NetXDuo
                                            
For version 6 and higher, please refer to the release notes on GitHub at https://github.com/eclipse-threadx/netxduo/releases.
Below is the revision history for 5.x.

1. NetXDuo

08-15-2019  NetX Duo generic code version 5.12. This release includes the
            following major features:

        Files are modified to fix window size overflow:
            nx_tcp_packet_send_control.c
            nx_tcp_socket_retransmit.c
            nx_tcp_socket_send_internal.c

        Files are modified to improve string length verification:
            demo_netx_duo_multihome_tcp.c
            demo_netx_duo_multihome_udp.c
            demo_netx_duo_tcp.c
            demo_netx_duo_udp.c
            nx_api.h
            nx_user.h

        Files are modified to improve RARP logic:
            nx_rarp_enable.c
            nx_rarp_periodic_update.c
            nx_rarp_packet_receive.c

        File is created to improve string length verification:
            nx_utility.c

        Files are modified to fix compiler warnings:
            nx_ip_checksum_compute.c
            nxd_ipv6_default_router_entry_get.c

        Files are modified to fix system state check:
            nx_api.h
            nx_icmp_packet_receive.c
            nx_igmp_packet_receive.c
            nx_tcp_client_bind_cleanup.c
            nx_tcp_connect_cleanup.c
            nx_tcp_disconnect_cleanup.c
            nx_tcp_packet_receive.c
            nx_tcp_receive_cleanup.c
            nx_tcp_transmit_cleanup.c
            nx_udp_packet_receive.c

        Files are modified to improve packet length verification:
            nx_arp_announce_send.c
            nx_arp_packet_receive.c
            nx_arp_packet_send.c
            nx_arp_probe_send.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_igmp_interface_report_send.c
            nx_rarp_packet_receive.c
            nx_rarp_packet_send.c
            nx_tcp_packet_send_control.c
            nx_udp_packet_receive.c

        Files are modified to support for 64-bit mode:
            nx_api.h
            nx_arp_queue_send.c
            nx_icmp_interface_ping.c
            nx_icmp_interface_ping6.c
            nx_icmpv4_process_echo_reply.c
            nx_icmpv4_send_error_message.c
            nx_icmpv6_destination_table_periodic_update.c
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_queued_packets.c
            nx_icmpv6_send_rs.c
            nx_icmpv6_validate_neighbor_message.c
            nx_icmpv6_validate_options.c
            nx_icmpv6_validate_ra.c
            nx_igmp_packet_process.c
            nx_ip_checksum_compute.c
            nx_ip_create.c
            nx_ip_dispatch_process.c
            nx_ip_driver_packet_send.c
            nx_ip_fast_periodic_timer_entry.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_forward_packet.c
            nx_ip_fragment_packet.c
            nx_ip_header_add.c
            nx_ip_packet_checksum_compute.c
            nx_ip_packet_send.c
            nx_ip_periodic_timer_entry.c
            nx_ip_thread_entry.c
            nx_ipv4_option_process.c
            nx_ipv4_packet_receive.c
            nx_ipv6_fragment_process.c
            nx_ipv6_header_add.c
            nx_ipv6_option_error.c
            nx_ipv6_packet_receive.c
            nx_ipv6_packet_send.c
            nx_ipv6_process_hop_by_hop_option.c
            nx_packet.h
            nx_packet_data_adjust.c
            nx_packet_debug_info_get.c
            nx_packet_pool_create.c
            nx_tcp_no_connection_reset.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_control.c
            nx_tcp_packet_send_syn.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_socket_packet_process.c
            nx_tcp_socket_receive.c
            nx_tcp_socket_retransmit.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_udp_packet_receive.c
            nx_udp_socket_bytes_available.c
            nx_udp_socket_receive.c
            nxd_ipv6_disable.c
            nxd_udp_socket_send.c
            nxde_icmp_ping.c
            nxde_icmp_source_ping.c
            nxe_packet_pool_create.c

        Other modified files:
            demo_netx_duo_multihome_udp.c                     Fixed packet leak when IPv4 disabled.
            nx_arp_packet_receive.c                           Fixed the ARP update on static entries.
            nx_ip_checksum_compute.c                          Fixed alignment issue.
            nx_ip_delete.c                                    Allowed driver uninit to execute without preemption disabled.
            nx_ip_dispatch_process.c                          Supported packet pool low watermark.
            nx_ipv4_option_process.c                          Improved internal logic.
            nx_ipv4_packet_receive.c                          Corrected the logic for checking DHCP message.
            nx_ipv4_packet_receive.c                          Supported packet pool low watermark.
            nxd_tcp_client_socket_connect.c                   Fixed a packet leak issue for TCP client.
            nx_tcp_packet_process.c                           Fixed connection MSS.
                                                              Validated option after SEQ and ACK are checked.
            nx_tcp_socket_packet_process.c                    Validated option after SEQ and ACK are checked.
            nx_tcp_packet_send_syn.c                          Fixed connection MSS.


07/15/2018  NetX Duo generic code version 5.11. This release includes the
            following major features:

        Files are modified to fix custom MSS value:
            nx_api.h
            nx_tcp_packet_process.c
            nx_tcp_packet_send_syn.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_socket_mss_get.c
            nx_tcp_socket_mss_set.c
            nx_tcp_socket_send_internal.c

        Files are modified to improve packet length verification:
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_packet_too_big.c
            nx_icmpv6_validate_options.c
            nx_ip_dispatch_process.c
            nx_ipv4_packet_receive.c
            nx_ipv6_packet_receive.c
            nx_ipv6_process_hop_by_hop_option.c
            nx_tcp_packet_process.c

        Files are modified to support Thread feature:
            nx_api.h
            nx_ipv6_process_hop_by_hop_option.c
            nx_ipv6_util.c
            nx_packet_allocate.c

        Files are modified to check interface for router lookup:
            nx_icmpv6_process_redirect.c
            nx_ipv6.h
            nx_ipv6_packet_send.c
            nxd_ipv6_router_lookup.c

        Files are modified to fix the logic to update the destination cache:
            nx_icmpv6.h
            nx_icmpv6_dest_table_add.c
            nx_icmpv6_dest_table_find.c
            nx_icmpv6_process_packet_too_big.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_queued_packets.c
            nx_ipv6_packet_send.c

        Files are modified to support specified source interface for IPv6:
            nx_icmp_ping6.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_rs.c
            nx_ipv6.h
            nxd_ipv6_interface_find.c
            nxd_tcp_client_socket_connect.c
            nxd_udp_socket_send.c

        Files are modified to improve internal logic:
            nx_api.h
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_send_error_message.c
            nx_ip_create.c
            nx_ip_dispatch_process.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_timeout_check.c
            nx_ip_header_add.c
            nx_ip_interface_attach.c
            nx_ip_interface_physical_address_set.c
            nx_ip_max_payload_size_find.c
            nx_ipv4_option_process.c
            nx_ipv6_header_add.c
            nx_ipv6_option_error.c
            nx_ipv6_packet_copy.c
            nx_ipv6_packet_send.c
            nx_ipv6_util.c
            nx_packet_allocate.c
            nx_packet_release.c
            nx_packet_transmit_release.c
            nx_ram_network_driver.c
            nx_tcp_client_socket_bind.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_control.c
            nx_tcp_packet_send_syn.c
            nx_tcp_server_socket_accept.c
            nx_tcp_socket_disconnect.c
            nx_tcp_socket_retransmit.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_udp_socket_bind.c
            nx_udp_socket_receive.c
            nxd_ipv6_default_router_delete.c
            nxd_ipv6_interface_find.c
            nxd_ipv6_search_onlink.c
            nxd_tcp_client_socket_connect.c
            nxd_udp_socket_send.c

        Files are modified to merge IPv6 loopback address with normal IPv6 address:
            nx_api.h
            nx_ip_create.c
            nx_ip_max_payload_size_find.c
            nxd_ipv6_disable.c
            nxde_icmp_source_ping.c
            nxde_ip_raw_packet_source_send.c
            nxde_ipv6_address_get.c
            nxde_udp_socket_source_send.c

        Files are modified to use macro to bring in symbol: _tx_thread_system_state:
            nxe_ip_forwarding_disable.c
            nxe_ip_forwarding_enable.c
            nxe_packet_pool_info_get.c
            nxe_tcp_enable.c
            nxe_tcp_socket_receive_queue_max_set.c
            nxe_udp_enable.c
            nxe_udp_info_get.c
            nxe_udp_socket_checksum_disable.c
            nxe_udp_socket_checksum_enable.c
            nxe_udp_socket_info_get.c

        Files are modified to remove unreachable code:
            nx_tcp_socket_receive.c
            nx_ipv6_packet_send.c

        Files are modified to be compatible with ThreadX 5.8 or later:
            nx_api.h
            nx_icmp_cleanup.c
            nx_icmpv4.h
            nx_ip.h
            nx_ip_delete.c
            nx_ip_raw_packet_cleanup.c
            nx_ip_raw_packet_disable.c
            nx_packet.h
            nx_packet_pool_cleanup.c
            nx_tcp.h
            nx_tcp_cleanup_deferred.c
            nx_tcp_client_bind_cleanup.c
            nx_tcp_client_socket_unbind.c
            nx_tcp_connect_cleanup.c
            nx_tcp_deferred_cleanup_check.c
            nx_tcp_disconnect_cleanup.c
            nx_tcp_receive_cleanup.c
            nx_tcp_server_socket_unaccept.c
            nx_tcp_socket_connection_reset.c
            nx_tcp_socket_disconnect.c
            nx_tcp_socket_state_established.c
            nx_tcp_socket_thread_suspend.c
            nx_tcp_transmit_cleanup.c
            nx_udp.h
            nx_udp_bind_cleanup.c
            nx_udp_receive_cleanup.c
            nx_udp_socket_unbind.c

        Files are modified to support random port find:
            nx_api.h
            nx_tcp_client_socket_bind.c
            nx_tcp_enable.c
            nx_tcp_free_port_find.c
            nx_udp_enable.c
            nx_udp_free_port_find.c
            nx_udp_socket_bind.c

        Files are modified to fix compiler errors when event trace is enabled:
            nx_icmpv4_packet_process.c
            nx_ip_create.c
            nx_ip_forwarding_disable.c
            nx_ip_forwarding_enable.c
            nx_ip_fragment_enable.c
            nx_ip_max_payload_size_find.c
            nx_ip_raw_packet_filter_set.c
            nx_ip_raw_packet_receive.c
            nx_ip_static_route_add.c
            nx_ip_static_route_delete.c
            nx_packet_allocate.c
            nx_rarp_disable.c
            nx_rarp_enable.c
            nx_rarp_info_get.c
            nx_tcp.h
            nx_tcp_connect_cleanup.c
            nx_tcp_socket_block_cleanup.c
            nx_tcp_socket_packet_process.c
            nx_tcp_socket_receive_notify.c
            nx_tcp_socket_state_syn_sent.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_window_update_notify_set.c
            nx_trace_object_unregister.c
            nx_trace_object_register.c
            nx_udp_info_get.c
            nx_udp_socket_checksum_disable.c
            nx_udp_socket_checksum_enable.c
            nx_udp_socket_info_get.c
            nx_udp_socket_port_get.c
            nxd_ipv6_address_change_notify.c
            nxd_ipv6_stateless_address_autoconfig_enable.c
            nxd_ipv6_stateless_address_autoconfig_disable.c
            nxd_udp_socket_send.c

        Files are modified to avoid NULL pointer access in trace logging:
            nx_ip_interface_info_get.c
            nx_ip_thread_entry.c
            nxd_ipv6_address_set.c
            nxd_udp_packet_info_extract.c

        Files are modified to fix the delay of initial router solicitation:
            nx_icmpv6.h
            nx_icmpv6_send_rs.c
            nx_user.h
            nxd_ipv6_enable.c
            nxd_ipv6_router_solicitation_check.c
            nxd_ipv6_stateless_address_autoconfig_enable.c

        Files are modified to move the destination and ND cache tables to IP structure:
            nx_api.h
            nx_icmpv6.h
            nx_icmpv6_DAD_clear_NDCache_entry.c
            nx_icmpv6_dest_table_add.c
            nx_icmpv6_dest_table_find.c
            nx_icmpv6_destination_table_periodic_update.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_queued_packets.c
            nx_ip_thread_entry.c
            nx_ipv6_packet_send.c
            nx_invalidate_destination_entry.c
            nx_nd_cache.h
            nx_nd_cache_add.c
            nx_nd_cache_add_entry.c
            nx_nd_cache_delete_internal.c
            nx_nd_cache_fast_periodic_update.c
            nx_nd_cache_find_entry.c
            nx_nd_cache_find_entry_by_mac_addr.c
            nx_nd_cache_interface_entries_delete.c
            nx_nd_cache_slow_periodic_update.c
            nx_system_initialize.c
            nxd_icmp_enable.c
            nxd_ipv6_destination_table_find_next_hop.c
            nxd_ipv6_disable.c
            nxd_ipv6_prefix_router_timer_tick.c
            nxd_nd_cache_entry_delete.c
            nxd_nd_cache_hardware_address_find.c
            nxd_nd_cache_invalidate.c
            nxd_nd_cache_ip_address_find.c

        Files are modified to add support for disabling IPv4:
            demo_netx_duo_multihome_tcp.c
            demo_netx_duo_multihome_udp.c
            demo_netx_duo_tcp.c
            demo_netx_duo_udp.c
            nx_api.h
            nx_arp.h
            nx_arp_announce_send.c
            nx_arp_dynamic_entries_invalidate.c
            nx_arp_dynamic_entry_delete.c
            nx_arp_dynamic_entry_set.c
            nx_arp_enable.c
            nx_arp_entry_allocate.c
            nx_arp_entry_delete.c
            nx_arp_gratuitous_send.c
            nx_arp_hardware_address_find.c
            nx_arp_info_get.c
            nx_arp_initialize.c
            nx_arp_interface_entries_delete.c
            nx_arp_ip_address_find.c
            nx_arp_packet_deferred_receive.c
            nx_arp_packet_receive.c
            nx_arp_packet_send.c
            nx_arp_periodic_update.c
            nx_arp_probe_send.c
            nx_arp_queue_process.c
            nx_arp_queue_send.c
            nx_arp_static_entries_delete.c
            nx_arp_static_entry_create.c
            nx_arp_static_entry_delete.c
            nx_arp_static_entry_delete_internal.c
            nx_icmp.h
            nx_icmp_enable.c
            nx_icmp_interface_ping.c
            nx_icmp_packet_process.c
            nx_icmp_packet_receive.c
            nx_icmp_ping.c
            nx_icmp_queue_process.c
            nx_icmpv4.h
            nx_icmpv4_packet_process.c
            nx_icmpv4_process_echo_reply.c
            nx_icmpv4_process_echo_request.c
            nx_icmpv4_send_error_message.c
            nx_igmp.h
            nx_igmp_enable.c
            nx_igmp_info_get.c
            nx_igmp_loopback_disable.c
            nx_igmp_loopback_enable.c
            nx_igmp_multicast_check.c
            nx_igmp_multicast_interface_join.c
            nx_igmp_multicast_interface_join_internal.c
            nx_igmp_multicast_interface_leave.c
            nx_igmp_multicast_interface_leave_internal.c
            nx_igmp_multicast_join.c
            nx_igmp_multicast_leave.c
            nx_igmp_packet_process.c
            nx_igmp_packet_receive.c
            nx_igmp_periodic_processing.c
            nx_igmp_queue_process.c
            nx_ip.h
            nx_ip_address_change_notify.c
            nx_ip_address_get.c
            nx_ip_address_set.c
            nx_ip_create.c
            nx_ip_delete.c
            nx_ip_dispatch_process.c
            nx_ip_driver_packet_send.c
            nx_ip_forward_packet_process.c
            nx_ip_forwarding_disable.c
            nx_ip_forwarding_enable.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_forward_packet.c
            nx_ip_fragment_packet.c
            nx_ip_fragment_timeout_check.c
            nx_ip_gateway_address_clear.c
            nx_ip_gateway_address_get.c
            nx_ip_gateway_address_set.c
            nx_ip_header_add.c
            nx_ip_interface_address_get.c
            nx_ip_interface_address_set.c
            nx_ip_interface_attach.c
            nx_ip_interface_detach.c
            nx_ip_interface_info_get.c
            nx_ip_interface_status_check.c
            nx_ip_max_payload_size_find.c
            nx_ip_packet_receive.c
            nx_ip_packet_send.c
            nx_ip_raw_packet_send.c
            nx_ip_raw_packet_source_send.c
            nx_ip_route_find.c
            nx_ip_static_route_add.c
            nx_ip_static_route_delete.c
            nx_ip_thread_entry.c
            nx_ipv4.h
            nx_ipv4_multicast_interface_join.c
            nx_ipv4_multicast_interface_leave.c
            nx_ipv4_option_process.c
            nx_ipv4_packet_receive.c
            nx_packet_allocate.c
            nx_ram_network_driver.c
            nx_rarp.h
            nx_rarp_disable.c
            nx_rarp_enable.c
            nx_rarp_info_get.c
            nx_rarp_packet_deferred_receive.c
            nx_rarp_packet_receive.c
            nx_rarp_packet_send.c
            nx_rarp_periodic_update.c
            nx_rarp_queue_process.c
            nx_tcp_client_socket_connect.c
            nx_tcp_no_connection_reset.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_control.c
            nx_tcp_packet_send_syn.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_server_socket_unaccept.c
            nx_tcp_socket_block_cleanup.c
            nx_tcp_socket_mss_set.c
            nx_tcp_socket_peer_info_get.c
            nx_tcp_socket_retransmit.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_udp_packet_info_extract.c
            nx_udp_packet_receive.c
            nx_udp_socket_receive.c
            nx_udp_socket_send.c
            nx_udp_source_extract.c
            nx_user.h
            nxd_icmp_enable.c
            nxd_icmp_ping.c
            nxd_icmp_source_ping.c
            nxd_ip_raw_packet_source_send.c
            nxd_tcp_client_socket_connect.c
            nxd_tcp_socket_peer_info_get.c
            nxd_udp_packet_info_extract.c
            nxd_udp_socket_send.c
            nxd_udp_socket_source_send.c
            nxd_udp_source_extract.c
            nxde_icmp_ping.c
            nxde_icmp_source_ping.c
            nxde_ip_raw_packet_send.c
            nxde_ip_raw_packet_source_send.c
            nxde_tcp_client_socket_connect.c
            nxde_udp_socket_send.c
            nxde_udp_socket_source_send.c
            nxe_arp_dynamic_entries_invalidate.c
            nxe_arp_dynamic_entry_set.c
            nxe_arp_enable.c
            nxe_arp_entry_delete.c
            nxe_arp_gratuitous_send.c
            nxe_arp_hardware_address_find.c
            nxe_arp_info_get.c
            nxe_arp_ip_address_find.c
            nxe_arp_static_entries_delete.c
            nxe_arp_static_entry_create.c
            nxe_arp_static_entry_delete.c
            nxe_icmp_enable.c
            nxe_icmp_ping.c
            nxe_igmp_enable.c
            nxe_igmp_info_get.c
            nxe_igmp_loopback_disable.c
            nxe_igmp_loopback_enable.c
            nxe_igmp_multicast_interface_join.c
            nxe_igmp_multicast_interface_leave.c
            nxe_igmp_multicast_join.c
            nxe_igmp_multicast_leave.c
            nxe_ip_address_change_notify.c
            nxe_ip_address_get.c
            nxe_ip_address_set.c
            nxe_ip_forwarding_disable.c
            nxe_ip_forwarding_enable.c
            nxe_ip_gateway_address_clear.c
            nxe_ip_gateway_address_get.c
            nxe_ip_gateway_address_set.c
            nxe_ip_interface_address_get.c
            nxe_ip_interface_address_set.c
            nxe_ip_interface_status_check.c
            nxe_ip_raw_packet_send.c
            nxe_ip_raw_packet_source_send.c
            nxe_ip_static_route_add.c
            nxe_ip_static_route_delete.c
            nxe_ipv4_multicast_interface_join.c
            nxe_ipv4_multicast_interface_leave.c
            nxe_rarp_disable.c
            nxe_rarp_enable.c
            nxe_rarp_info_get.c
            nxe_tcp_client_socket_connect.c
            nxe_tcp_socket_peer_info_get.c
            nxe_tcp_socket_send.c
            nxe_udp_packet_info_extract.c
            nxe_udp_socket_send.c
            nxe_udp_socket_source_send.c
            nxe_udp_source_extract.c

        Other modified files:

            nx_arp_packet_receive.c                           Added zero IP probe address check.
            nx_arp_periodic_update.c                          Improved retry counter check logic.
            nx_icmp_packet_receive.c                          Added logic for checking address of ICMP packet.
            nx_icmpv6_process_echo_request.c                  Corrected the logic for processing multicast echo.
            nx_igmp.h                                         Declared nx_igmp_interface_report_send function.
            nx_igmp_multicast_interface_leave_internal.c      Optimized to use the report_send function.
            nx_igmp_packet_process.c                          Fixed history information.
            nx_igmp_periodic_processing.c                     Optimized to use the report_send function.
            nx_ip_create.c                                    Fixed address index. The value is cleared by nxd_ipv6_disable.
            nx_ip_forward_packet_process.c                    Added check for class D address.
                                                                Corrected the logic for appending the overflowing data to the new packet.
            nx_ip_interface_detach.c                          Optimized the logic for invalidating destination entries when the router is invalid.
            nx_ipv6_fragment_process.c                        Fixed NULL pointer access.
            nx_nd_cache.h                                     Cleaned up internal functions.
            nx_nd_cache_clear_IsRouter_field.c                Removed unused function.
            nx_nd_cache_init.c                                Removed unused function.
            nx_packet.h                                       Adjusted the packet data to fill the specified header.
            nx_packet_data_append.c                           Fixed NULL pointer access.
            nx_tcp_client_socket_unbind.c                     Fixed a bug where packets in the receive queue may not be properly released.
            nx_tcp_packet_process.c                           Fixed the packet leak.
            nx_tcp_server_socket_accept.c                     Fixed an issue where SYN is sent multiple times.
            nx_tcp_socket_retransmit.c                        Fixed compiler error when NX_DISABLE_TCP_TX_CHECKSUM is defined.
            nx_tcp_socket_send_internal.c                     Fixed window size when receiving duplicated ACKs.
                                                                Fixed empty packet.
            nx_tcp_socket_state_ack_check.c                   Fixed ACK number check when zero window probe is ACKed.
                                                                Fixed the condition to update window size.
            nx_tcp_socket_state_transmit_check.c              Fixed window size when receiving duplicated ACKs.
            nx_user.h                                         Added symbol for checking address of ICMP packet.
            nxd_ipv6_default_router_delete.c                  Removed one line function _nx_nd_cache_clear_IsRouter_field().
            nxd_ipv6_enable.c                                 Fixed address index. The value is cleared by nxd_ipv6_disable.
            nxd_ipv6_prefix_router_timer_tick.c               Removed one line function _nx_nd_cache_clear_IsRouter_field().
                                                                Optimized the logic for invalidating destination entries when the router is invalid.
            nxd_nd_cache_invalidate.c                         Simplified the logic for invalidating all ND cache entries.
            nxd_nd_cache_invalidate_internal.c                Removed unused function.
            nxd_udp_socket_send.c                             Fixed compiler error when NX_DISABLE_UDP_TX_CHECKSUM is defined.
            nxe_ip_create.c                                   Modified invalid IP address check.
            nxe_ip_interface_attach.c                         Modified invalid IP address check.

        File created:
            nx_igmp_interface_report_send.c                   Created internal function for sending join and leave reports.
            nx_packet_data_adjust.c                           Adjusted the packet data to fill the specified header.


05/10/2016  NetX Duo generic code version 5.10. This release includes the
            following major features:

        Files are modified to add an argument to the parameter list of _nx_icmpv6_send_ns:
            nx_icmpv6.h
            nx_icmpv6_perform_DAD.c
            nx_icmpv6_send_ns.c
            nx_ip_thread_entry.c
            nx_ipv6_packet_send.c
            nx_nd_cache_fast_periodic_update.c

        Files are modified to remove unused stub functions for trace:
            nx_api.h
            nx_trace_event_insert.c
            nx_trace_event_update.c
            nx_trace_object_register.c
            nx_trace_object_unregister.c

        Files are modified to fix IPv6 router type:
            nx_api.h
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_ip.h
            nxd_ipv6_default_router_add.c
            nxd_ipv6_default_router_entry_get.c

        Files are added or modified to avoid recursive call:
            nx_icmpv6_send_ns.c
            nx_ip_dispatch_process.c
            nx_ipv6_header_add.c
            nx_ipv6_packet_send.c
            nx_ipv6_process_fragment_option.c

        Files are added or modified to remove unused IP pointer parameter:
            nx_api.h
            nx_icmpv6.h
            nx_icmpv6_destination_table_periodic_update.c
            nx_ip_thread_entry.c
            nx_nd_cache.h
            nx_nd_cache_add_entry.c
            nx_nd_cache_delete_internal.c
            nx_nd_cache_fast_periodic_update.c
            nx_nd_cache_interface_entries_delete.c
            nxd_ipv6_disable.c
            nxd_nd_cache_entry_delete.c
            nxd_nd_cache_invalidate.c
            nxd_nd_cache_invalidate_internal.c

        Files are added or modified to optimized the logic for IP address conflict detection:
            nx_api.h
            nx_arp.h
            nx_arp_announce_send.c
            nx_arp_gratuitous_send.c
            nx_arp_packet_receive.c
            nx_arp_probe_send.c

        Files are modified to pass PC-Lint check:
            nx_api.h
            nx_icmpv4.h
            nx_icmpv6.h
            nx_ip_create.c
            nx_ipv6.h
            nx_nd_cache.h
            nx_nd_cache_init.c

        Files are modified to support ASSERT macro:
            nx_arp_packet_send.c
            nx_icmpv6_dest_table_find.c
            nx_icmpv6_send_queued_packets.c
            nx_ip_checksum_compute.c
            nxd_ipv6_router_lookup.c
            nxd_tcp_client_socket_connect.c

        Files are modified to optimized the logic for TCP segment processing:
            nx_tcp_socket_packet_process.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_syn_received.c
            nx_tcp_socket_state_syn_sent.c

        Files are modified to remove unreachable code and deprecated functions:
            nx_api.h
            nx_arp.h
            nx_arp_entry_allocate.c
            nx_icmp.h
            nx_icmpv4.h
            nx_icmpv6.h
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_queued_packets.c
            nx_igmp.h
            nx_ipv4.h
            nx_ipv6.h
            nx_ipv6_fragment_process.c
            nx_ip_interface_detach.c
            nx_nd_cache_find_entry_by_mac_addr.c
            nx_packet.h
            nx_tcp.h
            nx_tcp_client_socket_bind.c
            nx_tcp_packet_process.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_tcp_socket_state_fin_wait1.c
            nx_tcp_socket_state_syn_sent.c
            nx_udp.h
            nx_udp_socket_bind.c
            nxd_ipv6_address_set.c
            nxd_ipv6_router_lookup.c
            nxd_ipv6_raw_packet_send_internal.c
            nxd_tcp_client_socket_connect.c
            nxde_udp_socket_send.c
            nxde_icmp_source_ping.c

        Files are modified to optimize the logic of checksum calculation:
            nx_icmp_interface_ping.c
            nx_icmp_interface_ping6.c
            nx_icmpv4_packet_process.c
            nx_icmpv4_process_echo_request.c
            nx_icmpv4_send_error_message.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_ip_checksum_compute.c
            nx_ip_fragment_packet.c
            nx_ip_header_add.c
            nx_ipv4_packet_receive.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_control.c
            nx_tcp_socket_send_internal.c
            nx_udp_socket_receive.c
            nxd_udp_socket_send.c

        Files are modified to protect ND process in _nx_icmpv6_packet_process:
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c

        Files are modified to avoid static analysis error report:
            nx_ipv6_fragment_process.c
            nxd_ipv6_address_set.c
            nxd_ipv6_default_router_entry_get.c
            nxd_ipv6_interface_find.c


        Other modified files:
            nx_api.h                                         Listed APIs by alphabetical order.
                                                               Added return status NX_CONTINUE.
                                                               Fixed typo of deprecated symbols.
            nx_arp_entry_allocate.c                          Fixed a bug that is_static of arp entry was not set.
            nx_arp_periodic_update.c                         Checked ARP expiration when NX_ARP_EXPIRATION_RATE is not zero.
                                                               Optimized the logic of updating ARP list.
            nx_arp_static_entries_delete.c                   Optimized the logic.
            nx_icmp_interface_ping6.c                        Optimized the logic due to NX_ICMPV6_ECHO is modified.
            nx_icmpv4_process_echo_reply.c                   Optimized the logic due to NX_ICMPV4_ECHO is modified.
            nx_icmpv6_destination_table_periodic_update.c    Optimized the code.
            nx_icmpv6_process_echo_reply.c                   Optimized the logic due to NX_ICMPV6_ECHO is modified.
            nx_icmpv6_process_ra.c                           Fixed a bug that is_router of ND entry was not set.
            nx_icmpv6_process_redirect.c                     Optimized the logic.
                                                               The destination table is not updated when packet is invalid.
            nx_icmpv6_send_ns.c                              Verified interface before is was used.
            nx_icmpv6_send_queued_packets.c                  Optimized the logic for fragmentation checking.
            nx_icmpv6_validate_neighbor_message.c            Fixed type check for destination address
                                                               when source address is unspecified.
            nx_igmp_multicast_interface_leave_internal       Fixed the bug for adding packet debug information.
            nx_igmp_packet_process                           Added support for packet chaining.
                                                               Compute the checksum over all IGMP data, not just the header.
                                                               Modified the logic for checking packet length.
            nx_igmp_periodic_processing                      Fixed the bug for adding packet debug information.
            nx_ipv4.h                                        Avoided redundant definition of fragmentation symbols.
            nx_ip_driver_packet_send.c                       Optimized the logic for fragmentation checking.
            nx_ip_fast_periodic_timer_entry.c                Set function _nx_ip_fast_periodic_timer_entry to static.
            nx_ip_forward_packet_process.c                   Fixed the bug for processing fragment bit.
            nx_ip_interface_detach.c                         Checked interface status before processing.
            nx_ip_route_find.c                               Fixed a bug that destination address is one of
                                                               the local interface addresses.
            nx_ipv4_option_process.c                         Optimized the code.
            nx_ipv4_packet_receive.c                         Adjusted processing order to make sure interface has IP address before forwarding.
            nx_ipv6_fragment_process.c                       Cleared reserved field in fragment option.
            nx_ipv6_option_error.c                           Optimized the logic for default case of switch.
            nx_ipv6_packet_send.c                            Optimized the logic for fragmentation checking.
                                                               Removed unnecessary check.
            nx_ipv6_perform_min_path_MTU_discovery.c         Moved the functionality into nx_icmpv6_destination_table_periodic_update.c
            nx_packet_data_extract_offset.c                  Removed duplicated for zero packet length.
            nx_system_initialize.c                           Make sure this service cannot invoked more than once.
                                                               Created destination table MUTEX.
            nx_tcp.h                                         Cleaned up the logic to get SYN packet size.
            nx_user.h                                        Added NX_DISABLE_ICMPV4_ERROR_MESSAGE configuration option
            nx_tcp_packet_process.c                          Fixed check for multicast source address.
            nx_tcp_socket_delete.c                           Fixed socket state check.
            nx_tcp_socket_disconnect.c                       Optimized the logic for checking wait_option.
            nx_tcp_socket_receive.c                          Suspended the send request when the connection is in progress.
            nx_tcp_socket_retransmit.c                       Fixed initial CWND value for fast recovery.
            nx_tcp_socket_send_internal.c                    Fixed a bug that empty segment was sent when data append failed.
                                                               Fixed a bug of endless loop in packet queue traverse.
                                                               Fixed the alignment of chained packet.
                                                               Suspended the send request when the connection is in progress.
            nx_tcp_socket_state_ack_check.c                  Fixed the calculation of TCP payload when packet
                                                               was not released by driver.
                                                               Fixed the check for immediately retransmission.
            nx_tcp_socket_state_data_check.c                 Fixed NULL pointer access.
            nx_tcp_socket_state_syn_received.c               Optimized the logic for checking acknowledgment number.
            nxd_icmp_ping.c                                  Removed duplicated error check.
            nxd_icmp_source_ping.c                           Removed duplicated error check.
            nxd_ipv6_disable.c                               Deleted ND cache added to current IP only.
                                                               Protected ND cache process by mutex.
            nxd_ipv6_interface_find.c                        Fixed a bug that destination address is one of
                                                               the local IPv6 addresses.
            nxd_tcp_client_socket_connect.c                  Cleaned up the logic to get SYN packet size.
            nxde_ip_raw_packet_send.c                        Removed unnecessary check. The return value of
                                                               _nxd_ip_raw_packet_source_send is always NX_SUCCESS.
            nxe_ip_raw_packet_source_send.c                  Removed unnecessary check. The return value of
                                                               _nx_ip_raw_packet_source_send is always NX_SUCCESS.


02/22/2016  NetX Duo generic code version 5.9. This release includes the
            following major features:

        Files are modified to fix compiler warnings:
            demo_netx_duo_multihome_tcp.c
            demo_netx_duo_multihome_udp.c
            demo_netx_duo_tcp.c
            demo_netx_duo_udp.c
            nx_api.h
            nx_icmpv4_packet_process.c
            nx_icmpv6_DAD_failure.c
            nx_icmpv6_dest_table_add.c
            nx_icmpv6_dest_table_find.c
            nx_icmpv6_destination_table_periodic_update.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_ip_auxiliary_packet_pool_set.c
            nx_ip_checksum_compute.c
            nx_ip_dispatch_process.c
            nx_ip_driver_deferred_enable.c
            nx_ip_driver_deferred_receive.c
            nx_ip_driver_packet_send.c
            nx_ip_forward_packet_process.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_disable.c
            nx_ip_fragment_enable.c
            nx_ip_interface_capability_get.c
            nx_ip_interface_capability_set.c
            nx_ip_max_payload_size_find.c
            nx_ip_packet_checksum_compute.c
            nx_ip_packet_send.c
            nx_ip_raw_packet_filter_set.c
            nx_ip_raw_packet_processing.c
            nx_ip_static_route_add.c
            nx_ip_static_route_delete.c
            nx_ipv6_fragment_process.c
            nx_ipv6_option_error.c
            nx_ipv6_packet_send.c
            nx_ipv6_process_fragment_option.c
            nx_ipv6_process_hop_by_hop_option.c
            nx_ipv6_process_routing_option.c
            nx_ipv6_util.c
            nx_nd_cache_delete_internal.c
            nx_packet_copy.c
            nx_packet_data_append.c
            nx_packet_pool_low_watermark_set.c
            nx_tcp_cleanup_deferred.c
            nx_tcp_periodic_processing.c
            nx_tcp_socket_disconnect_complete_notify.c
            nx_tcp_socket_establish_notify.c
            nx_tcp_socket_queue_depth_notify_set.c
            nx_tcp_socket_receive_queue_max_set.c
            nx_tcp_socket_timed_wait_callback.c
            nx_udp_socket_receive.c
            nxd_icmpv6_ra_flag_callback_set.c
            nxd_ipv6_address_change_notify.c
            nxd_ipv6_address_delete.c
            nxd_ipv6_address_get.c
            nxd_ipv6_address_set.c
            nxd_ipv6_default_router_add.c
            nxd_ipv6_default_router_delete.c
            nxd_ipv6_default_router_entry_get.c
            nxd_ipv6_default_router_get.c
            nxd_ipv6_default_router_number_of_entries_get.c
            nxd_ipv6_disable.c
            nxd_ipv6_enable.c
            nxd_ipv6_multicast_interface_join.c
            nxd_ipv6_multicast_interface_leave.c
            nxd_ipv6_stateless_address_autoconfig_disable.c
            nxd_ipv6_stateless_address_autoconfig_enable.c
            nxd_nd_cache_entry_delete.c
            nxd_nd_cache_entry_set.c
            nxd_nd_cache_hardware_address_find.c
            nxd_nd_cache_invalidate.c
            nxd_nd_cache_invalidate_internal.c
            nxd_nd_cache_ip_address_find.c
            nxd_udp_socket_send.c
            nxde_icmpv6_ra_flag_callback_set.c
            nxde_ipv6_address_change_notify.c
            nxde_ipv6_address_delete.c
            nxde_ipv6_address_get.c
            nxde_ipv6_address_set.c
            nxde_ipv6_default_router_add.c
            nxde_ipv6_default_router_delete.c
            nxde_ipv6_default_router_entry_get.c
            nxde_ipv6_default_router_get.c
            nxde_ipv6_default_router_number_of_entries_get.c
            nxde_ipv6_disable.c
            nxde_ipv6_enable.c
            nxde_ipv6_multicast_interface_join.c
            nxde_ipv6_multicast_interface_leave.c
            nxde_ipv6_stateless_address_autoconfig_disable.c
            nxde_ipv6_stateless_address_autoconfig_enable.c
            nxde_nd_cache_entry_delete.c
            nxde_nd_cache_entry_set.c
            nxde_nd_cache_hardware_address_find.c
            nxde_nd_cache_invalidate.c
            nxde_nd_cache_ip_address_find.c
            nxe_ip_auxiliary_packet_pool_set.c
            nxe_ip_interface_capability_get.c
            nxe_ip_interface_capability_set.c
            nxe_ip_raw_packet_filter_set.c
            nxe_ip_static_route_add.c
            nxe_ip_static_route_delete.c
            nxe_packet_pool_low_watermark_set.c
            nxe_tcp_socket_disconnect_complete_notify.c
            nxe_tcp_socket_establish_notify.c
            nxe_tcp_socket_queue_depth_notify_set.c
            nxe_tcp_socket_receive_queue_max_set.c
            nxe_tcp_socket_timed_wait_callback.c

        Files are modified to return NX_NOT_SUPPORTED when related compiler option is not enabled:
            nx_api.h
            nx_icmp.h
            nx_icmpv6.h
            nx_ipv6.h
            nx_nd_cache.h
            nx_packet.h
            nx_tcp.h
            nx_tcp_socket_disconnect_complete_notify.c
            nx_tcp_socket_establish_notify.c
            nx_tcp_socket_queue_depth_notify_set.c
            nx_tcp_socket_timed_wait_callback.c
            nxd_icmpv6_ra_flag_callback_set.c
            nxd_ipv6_address_change_notify.c
            nxd_ipv6_address_delete.c
            nxd_ipv6_address_get.c
            nxd_ipv6_address_set.c
            nxd_ipv6_default_router_add.c
            nxd_ipv6_default_router_delete.c
            nxd_ipv6_default_router_entry_get.c
            nxd_ipv6_default_router_get.c
            nxd_ipv6_default_router_number_of_entries_get.c
            nxd_ipv6_multicast_interface_join.c
            nxd_ipv6_multicast_interface_leave.c
            nxd_ipv6_stateless_address_autoconfig_disable.c
            nxd_ipv6_stateless_address_autoconfig_enable.c
            nxd_nd_cache_entry_delete.c
            nxd_nd_cache_entry_set.c
            nxd_nd_cache_hardware_address_find.c
            nxd_nd_cache_invalidate.c
            nxd_nd_cache_ip_address_find.c
            nxde_icmpv6_ra_flag_callback_set.c
            nxde_ipv6_address_delete.c
            nxde_ipv6_address_get.c
            nxde_ipv6_address_set.c
            nxde_ipv6_default_router_add.c
            nxde_ipv6_default_router_delete.c
            nxde_ipv6_default_router_entry_get.c
            nxde_ipv6_default_router_get.c
            nxde_ipv6_default_router_number_of_entries_get.c
            nxde_ipv6_stateless_address_autoconfig_disable.c
            nxde_ipv6_stateless_address_autoconfig_enable.c
            nxde_nd_cache_entry_delete.c
            nxde_nd_cache_entry_set.c
            nxde_nd_cache_hardware_address_find.c
            nxde_nd_cache_invalidate.c
            nxde_nd_cache_ip_address_find.c
            nxe_ip_auxiliary_packet_pool_set.c
            nxe_tcp_socket_disconnect_complete_notify.c
            nxe_tcp_socket_establish_notify.c
            nxe_tcp_socket_queue_depth_notify_set.c
            nxe_tcp_socket_timed_wait_callback.c

         Files are modified to fix address index check for loopback interface:
            nxde_icmp_source_ping.c
            nxde_ip_raw_packet_source_send.c
            nxde_udp_socket_source_send.c
            nxe_ip_raw_packet_source_send.c
            nxe_udp_socket_source_send.c

         Files are modified to support IP packet filter:
            nx_api.h
            nx_ip_packet_receive.c
            nx_ip_packet_send.c
            nx_ipv6_packet_send.c

        Files are added or modified to set TCP receive queue length:
            nx_api.h
            nx_tcp.h
            nx_tcp_socket_create.c
            nx_tcp_socket_receive_queue_max_set.c
            nx_tcp_socket_state_data_check.c
            nx_user.h
            nxe_tcp_socket_receive_queue_max_set.c

        Files are added or modified to support packet pool low watermark:
            nx_api.h
            nx_packet.h
            nx_packet_pool_low_watermark_set.c
            nx_tcp_socket_state_data_check.c
            nx_udp_packet_receive.c
            nx_user.h
            nxe_packet_pool_low_watermark_set.c
            nxe_tcp_socket_receive_queue_max_set.c

        Files are modified to add mutex protection:
            nx_rarp_disable.c
            nx_tcp_socket_queue_depth_notify_set.c
            nx_tcp_socket_receive_notify.c
            nx_tcp_socket_timed_wait_callback.c
            nx_tcp_socket_window_update_notify_set.c

        Files are added or modified to fix source selection for icmpv4 ping:
            nx_icmpv4.h
            nx_icmp_interface_ping.c
            nx_icmp_ping.c
            nxd_icmp_source_ping.c

        Files are modified to support ASSERT macro:
            nx_api.h
            nx_icmpv6_dest_table_add.c
            nx_ip_header_add.c
            nx_ip_driver_packet_send.c
            nx_ipv6_packet_send.c
            nxd_ipv6_destination_table_find_next_hop.c
            nxd_ipv6_interface_find.c

        Files are added or modified to support NewReno algorithm:
            nx_api.h
            nx_tcp.h
            nx_tcp_socket_retransmit.c
            nx_tcp_fast_periodic_processing.c
            nx_tcp_packet_send_syn.c
            nx_tcp_socket_block_cleanup.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_transmit_check.c
            nx_tcp_socket_state_syn_sent.c
            nx_tcp_socket_state_syn_received.c

        Files are added or modified to optimize the logic of sending TCP control packet:
            nx_tcp_packet_send_control.c
            nx_tcp_packet_send_syn.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_rst.c

        Files are deleted due to they are not used:
            nxe_igmp_multicast_interface_join_internal.c
            nxe_igmp_multicast_interface_leave_internal.c

        Files are modified to unify the definition of ThreadX ticks per second, use TX_TIMER_TICKS_PER_SECOND to derive NX_IP_PERIODIC_RATE:
            demo_netx_duo_multihome_tcp.c
            demo_netx_duo_multihome_udp.c
            demo_netx_duo_tcp.c
            demo_netx_duo_udp.c
            nx_api.h
            nx_icmpv6_dest_table_add.c
            nx_icmpv6_dest_table_find.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_validate_ra.c
            nx_ip_create.c
            nx_ip_fast_periodic_timer_entry.c
            nx_system.h
            nx_system_initialize.c
            nx_tcp.h
            nx_tcp_enable.c
            nx_user.h
            nxd_ipv6_disable.c
            nxd_ipv6_enable.c

        Files are deleted or modified to simplified the logic of extracting the prefix:
            nx_ipv6_address_find_prefix.c
            nx_ipv6.h
            nx_ipv6_prefix_list_delete_entry.c

        Files are modified to correct the IP Identification field for retransmitted packet:
            nx_api.h
            nx_ip_header_add.c
            nx_packet_allocate.c
            nx_packet_release.c
            nx_tcp_socket_retransmit.c

        Files are added or modified to fix zero window probe packet:
            nx_api.h
            nx_tcp.h
            nx_tcp_fast_periodic_processing.c
            nx_tcp_packet_send_probe.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c

        Files are modified to correct the sequence and ACK number check for TCP disconnect process:
            nx_api.h
            nx_tcp.h
            nx_tcp_server_socket_accept.c
            nx_tcp_socket_packet_process.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_fin_wait1.c
            nx_tcp_socket_state_fin_wait2.c
            nx_tcp_client_socket_connect.c

        Files are modified to pass PC-Lint check:
            nx_icmp.h
            nx_icmpv6.h
            nx_ip.h
            nx_ipv4.h
            nx_ipv6.h
            nx_ipv6_prefix_list_delete.c
            nx_nd_cache.h
            nx_udp.h
            nxd_icmp_ping.c
            nxd_icmp_source_ping.c
            nxd_icmpv6_ra_flag_callback_set.c
            nxd_ip_raw_packet_send.c
            nxd_ipv6_address_change_notify.c
            nxd_ipv6_address_set.c
            nxd_ipv6_default_router_add_internal.c
            nxd_ipv6_destination_table_find_next_hop.c
            nxd_ipv6_disable.c
            nxd_ipv6_enable.c
            nxd_ipv6_find_default_router_from_address.c
            nxd_ipv6_find_max_prefix_length.c
            nxd_ipv6_interface_find.c
            nxd_ipv6_raw_packet_send_internal.c
            nxd_ipv6_router_lookup.c
            nxd_ipv6_search_onlink.c
            nxd_ipv6_stateless_address_autoconfig_enable.c
            nxd_nd_cache_entry_set.c
            nxd_nd_cache_hardware_address_find.c
            nxde_icmp_ping.c
            nxde_icmp_source_ping.c
            nxde_ip_raw_packet_send.c
            nxde_ip_raw_packet_source_send.c
            nxde_ipv6_address_delete.c
            nxde_ipv6_default_router_delete.c
            nxde_ipv6_multicast_interface_join.c
            nxde_ipv6_multicast_interface_delete.c
            nxde_nd_cache_entry_set.c
            nxde_udp_socket_send.c


        Files are modified to remove deprecated macro for IPv6 path MTU:
            nx_icmpv6.h
            nx_user.h


        Files are added or modified to support packet debug feature:
            nx_api.h
            nx_arp_gratuitous_send.c
            nx_arp_packet_deferred_receive.c
            nx_arp_packet_send.c
            nx_icmp_interface_ping6.c
            nx_icmp_packet_process.c
            nx_icmp_packet_receive.c
            nx_icmp_ping.c
            nx_icmpv4_packet_process.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_packet_too_big.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_igmp_multicast_interface_leave_internal.c
            nx_igmp_packet_process.c
            nx_igmp_packet_receive.c
            nx_igmp_periodic_processing.c
            nx_ip_dispatch_process.c
            nx_ip_driver_packet_send.c
            nx_ip_fragment_forward_packet.c
            nx_ip_fragment_packet.c
            nx_ip_packet_deferred_receive.c
            nx_ip_packet_receive.c
            nx_ip_packet_send.c
            nx_ip_raw_packet_processing.c
            nx_ip_raw_packet_send.c
            nx_ip_raw_packet_source_send.c
            nx_ip_thread_entry.c
            nx_ipv4_packet_receive.c
            nx_ipv6_fragment_process.c
            nx_ipv6_packet_receive.c
            nx_ipv6_process_fragment_option.c
            nx_ipv6_process_hop_by_hop_option.c
            nx_ipv6_process_routing_option.c
            nx_packet.h
            nx_packet_allocate.c
            nx_packet_copy.c
            nx_packet_data_append.c
            nx_packet_debug_info_get.c
            nx_packet_pool_create.c
            nx_packet_release.c
            nx_packet_transmit_release.c
            nx_rarp_packet_deferred_receive.c
            nx_rarp_packet_send.c
            nx_tcp_packet_process.c
            nx_tcp_packet_receive.c
            nx_tcp_queue_process.c
            nx_tcp_socket_packet_process.c
            nx_tcp_socket_send.c
            nx_tcp_socket_send_internal.c
            nx_udp_packet_receive.c
            nx_user.h
            nxd_ip_raw_packet_source_send.c
            nxd_udp_socket_send.c


        Files are modified to support packet alignment for both header and payload:
            nx_api.h
            nx_packet_pool_create.c
            nxe_packet_pool_create.c
            nx_user.h

        Files are added or modified to ensure only one ARP entry point to specific address and optimized the ARP queued packet sending:
            nx_api.h
            nx_arp.h
            nx_arp_queue_send.c
            nx_arp_dynamic_entry_set.c
            nx_arp_entry_allocate.c
            nx_arp_static_entry_create.c
            nx_arp_static_entry_delete_internal.c
            nx_arp_packet_receive.c
            nx_ip_driver_packet_send.c

        Files are modified to send TCP reset message when receive an illegal TCP option:
            nx_tcp.h
            nx_tcp_packet_process.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_mss_option_get.c
            nx_tcp_window_scaling_option_get.c
            nx_tcp_no_connection_reset.c

        Files are modified to support for TCP TIMED WAIT state:
            nx_tcp.h
            nx_tcp_enable.c
            nxd_tcp_client_socket_connect.c
            nx_tcp_fast_periodic_processing.c
            nx_tcp_socket_state_fin_wait1.c
            nx_tcp_socket_state_fin_wait2.c
            nx_tcp_socket_state_closing.c
            nx_tcp_socket_packet_process.c

        Files are modified to optimize the code for deleting transmission control block
            nx_tcp.h
            nx_tcp_fast_periodic_processing.c
            nx_tcp_client_socket_unbind.c
            nx_tcp_socket_block_cleanup.c
            nx_tcp_socket_connection_reset.c
            nx_tcp_socket_disconnection.c
            nx_tcp_socket_state_last_ack.c

        Files are added or modified to support ICMPv4 error message:
            nx_icmpv4.h
            nx_icmpv4_packet_process.c
            nx_icmpv4_process_echo_reply.c
            nx_icmpv4_process_echo_request.c
            nx_icmpv4_send_error_message.c
            nx_ip_dispatch_process.c
            nx_ip_fragment_timeout_check.c
            nx_udp_packet_receive.c

        Files are added or modified to support IP Option processing:
            nx_ipv4.h
            nx_ipv4_packet_receive.c
            nx_ipv4_option_process.c

        Files are modified to correct the reassembly time:
            nx_api.h
            nx_user.h
            nx_ip_fragment_assembly.c

        Files are modified to optimize the code.
            nx_ip_gateway_address_set.c
            nx_ipv4.h
            nx_nd_cache_add.c
            nx_nd_cache_add_entry.c
            nx_nd_cache_find_entry.c
            nx_tcp_client_bind_cleanup.c
            nx_tcp_connect_cleanup.c
            nx_tcp_disconnect_cleanup.c
            nx_tcp_receive_cleanup.c
            nx_tcp_transmit_cleanup.c
            nxd_ipv6_stateless_address_autoconfig_disable.c
            nxd_ipv6_stateless_address_autoconfig_enable.c
            nxd_nd_cache_ip_address_find.c
            nxd_nd_cache_hardware_address_find.c
            nxde_ipv6_stateless_address_autoconfig_disable.c
            nxde_ipv6_stateless_address_autoconfig_enable.c
            nxe_ip_gateway_address_set.c
            nxe_ip_raw_packet_receive.c
            nxe_ip_static_route_add.c

         Files are modified to assembled all the fragments before calling NAT service:
            nx_api.h
            nx_ip_fragment_assembly.c
            nx_ipv4_packet_receive.c

        The following table contains mappings from legacy names to the new names developers
        are encouraged to use for furture development work.  For backward compatibility reasons,
        legacy names are still maintained. Therefore existing projects and build systems are not
        affected.


                  Legacy Names                                       New Names

            NX_ARP_DISABLE_AUTO_ARP_ENTRY                       NX_DISABLE_ARP_AUTO_ENTRY
            NX_DISABLE_ICMPv4_RX_CHECKSUM                       NX_DISABLE_ICMPV4_RX_CHECKSUM
            NX_DISABLE_ICMPv4_TX_CHECKSUM                       NX_DISABLE_ICMPV4_TX_CHECKSUM
            NX_DISABLE_ICMPv6_RX_CHECKSUM                       NX_DISABLE_ICMPV6_RX_CHECKSUM
            NX_DISABLE_ICMPv6_TX_CHECKSUM                       NX_DISABLE_ICMPV6_TX_CHECKSUM
            NX_DUAL_PACKET_POOL_ENABLE                          NX_ENABLE_DUAL_PACKET_POOL
            NX_IPV6_ADDRESS_CHANGE_NOTIFY_ENABLE                NX_ENABLE_IPV6_ADDRESS_CHANGE_NOTIFY
            NX_IPV6_DISABLE_PURGE_UNUSED_CACHE_ENTRIES          NX_DISABLE_IPV6_PURGE_UNUSED_CACHE_ENTRIES
            NX_IPV6_MULTICAST_ENABLE                            NX_ENABLE_IPV6_MULTICAST
            NX_TCP_ENABLE_KEEPALIVE                             NX_ENABLE_TCP_KEEPALIVE
            NX_TCP_ENABLE_MSS_CHECK                             NX_ENABLE_TCP_MSS_CHECK
            NX_TCP_ENABLE_WINDOW_SCALING                        NX_ENABLE_TCP_WINDOW_SCALING
            NX_TCP_QUEUE_DEPTH_UPDATE_NOTIFY_ENABLE             NX_ENABLE_TCP_QUEUE_DEPTH_UPDATE_NOTIFY
            NXDUO_DESTINATION_TABLE_SIZE                        NX_IPV6_DESTINATION_TABLE_SIZE
            NXDUO_DISABLE_ICMPV6_ERROR_MESSAGE                  NX_DISABLE_ICMPV6_ERROR_MESSAGE
            NXDUO_DISABLE_ICMPV6_REDIRECT_PROCESS               NX_DISABLE_ICMPV6_REDIRECT_PROCESS
            NXDUO_DISABLE_ICMPV6_ROUTER_ADVERTISEMENT_PROCESS   NX_DISABLE_ICMPV6_ROUTER_ADVERTISEMENT_PROCESS
            NXDUO_DISABLE_ICMPV6_ROUTER_SOLICITATION            NX_DISABLE_ICMPV6_ROUTER_SOLICITATION
            NXDUO_DISABLE_DAD                                   NX_DISABLE_IPV6_DAD
            NXDUO_DUP_ADDR_DETECT_TRANSMITS                     NX_IPV6_DAD_TRANSMITS
            NXDUO_ICMPV6_MAX_RTR_SOLICITATIONS                  NX_ICMPV6_MAX_RTR_SOLICITATIONS
            NXDUO_ICMPV6_RTR_SOLICITATION_INTERVAL              NX_ICMPV6_RTR_SOLICITATION_INTERVAL
            NX_CRYPTO_MAX_IV_SIZE_IN_BITS                       (Moved into IPsec module)

        Files are modified to rename symbols:

            nx_api.h
            nx_arp_gratuitous_send.c
            nx_arp_packet_receive.c
            nx_arp_packet_send.c
            nx_icmp_interface_ping6.c
            nx_icmp_interface_ping.c
            nx_icmpv4_packet_process.c
            nx_icmpv4_process_echo_request.c
            nx_icmpv4_send_error_message.c
            nx_icmpv6_DAD_failure.c
            nx_icmpv6_destination_table_periodic_update.c
            nx_icmpv6_dest_table_add.c
            nx_icmpv6_dest_table_find.c
            nx_icmpv6.h
            nx_icmpv6_packet_process.c
            nx_icmpv6_perform_DAD.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_icmpv6_validate_ra.c
            nx_igmp_multicast_interface_leave_internal.c
            nx_igmp_periodic_processing.c
            nx_invalidate_destination_entry.c
            nx_ip_auxiliary_packet_pool_set.c
            nx_ip_create.c
            nx_ip_dispatch_process.c
            nx_ip_fragment_timeout_check.c
            nx_ip_interface_attach.c
            nx_ip_interface_detach.c
            nx_ip_packet_receive.c
            nx_ip_packet_send.c
            nx_ip_thread_entry.c
            nx_ipv6_option_error.c
            nx_ipv6_packet_receive.c
            nx_ipv6_packet_send.c
            nx_ipv6_prefix_list_delete_entry.c
            nx_ipv6_process_fragment_option.c
            nx_ipv6_process_routing_option.c
            nx_mld.h
            nx_nd_cache_add_entry.c
            nx_nd_cache_delete_internal.c
            nx_packet.h
            nx_packet_pool_low_watermark_set.c
            nx_rarp_packet_send.c
            nx_system.h
            nx_system_initialize.c
            nx_tcp.h
            nx_tcp_packet_process.c
            nx_tcp_packet_send_control.c
            nx_tcp_packet_send_syn.c
            nx_tcp_periodic_processing.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_socket_create.c
            nx_tcp_socket_disconnect.c
            nx_tcp_socket_queue_depth_notify_set.c
            nx_tcp_socket_receive_queue_max_set.c
            nx_tcp_socket_retransmit.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_tcp_socket_state_established.c
            nx_tcp_socket_state_syn_received.c
            nx_tcp_socket_state_syn_sent.c
            nx_tcp_window_scaling_option_get.c
            nx_udp_packet_receive.c
            nx_user.h
            nxde_ipv6_address_change_notify.c
            nxde_ipv6_multicast_interface_join.c
            nxde_ipv6_multicast_interface_leave.c
            nxd_icmp_enable.c
            nxd_ipv6_address_change_notify.c
            nxd_ipv6_address_delete.c
            nxd_ipv6_address_set.c
            nxd_ipv6_destination_table_find_next_hop.c
            nxd_ipv6_disable.c
            nxd_ipv6_enable.c
            nxd_ipv6_interface_find.c
            nxd_ipv6_multicast_interface_join.c
            nxd_ipv6_multicast_interface_leave.c
            nxd_ipv6_prefix_router_timer_tick.c
            nxd_ipv6_router_solicitation_check.c
            nxe_packet_pool_low_watermark_set.c
            nxe_tcp_socket_create.c
            nxe_tcp_socket_queue_depth_notify_set.c
            nxe_tcp_socket_receive_queue_max_set.c



        Other modified files:
            nx_api.h                                         Removed internal functions.
                                                               Fixed typo for API names of stateless address control.
                                                               Added a macro to disable warning of parameter not used.
            nx_icmp_ping.h                                   Optimized the data offset of request packet.
            nx_icmp_interface_ping6.c                        Removed limitation of message size when sending echo request.
            nx_icmpv6.h                                      Updated the function name.
                                                               Removed unused argument of _nxd_ipv6_destination_table_find_next_hop.
            nx_icmpv6_dest_table_add.c                       Fixed a bug when destination table was full, index of
                                                               array was out of bound.
            nx_icmpv6_perform_DAD.c                          Updated the function name.
            nx_icmpv6_DAD_clear_NDCache_entry.c              Updated the function name and optimized the code.
            nx_icmpv6_DAD_failure.c                          Renamed the argument name to make it sense.
            nx_icmpv6_process_packet_too_big.c               Fixed a bug that packet was not released.
            nx_icmpv6_process_ra.c                           Fixed a bug that address was formed when prefix was link local.
                                                               Fixed the logic to find empty address entry.
                                                               Fixed retrans timer when it is 0.
            nx_icmpv6_process_redirect.c                     Fixed return status check. Fixed endian of MTU.
            nx_icmpv6_send_error_message.c                   Used wrong IPv6 address.
                                                               Fixed packet leak if IPsec SA disallows this packet.
                                                               Fixed multicast destination address check.
            nx_icmpv6_send_queued_packets                    Optimized the logic for IPv6 fragment processing.
            nx_icmpv6_send_rs.c                              Removed unreachable code.
            nx_icmpv6_validate_neighbor_message.c            Removed unused argument.
            nx_icmpv6_validate_ra.c                          Removed unused argument.
            nx_igmp_packet_process.c                         Optimized the logic of verifying checksum.
            nx_igmp_periodic_process.c                       Removed useless code.
            nx_ip_checksum_compute.c                         Fixed calculation for packet size that is only two bytes aligned.
            nx_ip_create.c                                   Removed the status check for TX API since internal call should be succeed.
            nx_ip_deferred_link_status_process.c             Removed cleanup logic when link was down.
            nx_ip_delete.c                                   Invalidated dynamic ARP entries and ND cache,
                                                               in case packets were queued.
            nx_ip_dispatch_process.c                         Corrected length check for extension header.
                                                               Removed unreachable code.
            nx_ip_driver_packet_send.c                       Added support for IPv4 link-local address
                                                               Optimized the logic for packet sending.
                                                               Added fragmentation check.
            nx_ip_header_add.c                               Stored IP header for outgoing packet.
            nx_ip_fragment_assembly.c                        Used the more recently arrived copy if fragments contain the same data.
                                                               Corrected the logic to find insert position for IPv6 fragments.
            nx_ip_fragment_disable.c                         Removed unreachable code when NX_FRAGMENT_IMMEDIATE_ASSEMBLY is defined.
            nx_ip_fragment_packet.c                          Removed unreachable code.
            nx_ip_fragment_forward_packet.c                  Removed unreachable code.
            nx_ip_forward_packet_process.c                   Added checks for link local address before forwarding.
            nx_ip_interface_attach.c                         Fixed duplicate empty address.
            nx_ip_interface_detach.c                         Simplified the logic to leave multicast group.
            nx_ip_interface_status_check.c                   Checked driver code for NX_IP_LINK_ENABLED status.
                                                               Fixed the bug for wait_option.
            nx_ip_packet_checksum_compute.c                  Removed code not used. Fixed offset when IPv4 header contained options.
                                                               Removed flag after IPv4 checksum calculated.
                                                               Fixed length calculation of IPv4 header.
            nx_ip_packet_send.c                              Removed unreachable lines.
                                                               Initialized status value.
            nx_ip_raw_packet_send.c                          Removed duplicate check for raw service enabled.
            nx_ip_raw_packet_source_send.c                   Removed duplicate check for raw service enabled.
                                                               Optimized the code.
            nx_ip_route_find.c                               Optimized search operation for loopback address.
                                                               Fixed a bug that loopback interface was used by multicast or broadcase address.
                                                               Added support for link-local address.
                                                               Verified whther or not routing address was reachable.
            nx_ip_static_route_add.c                         Fixed a bug that mutex is not released before return.
            nx_ip_status_check.c                             Removed duplicated code.
            nx_ip_thread_entry.c                             Ensured the pointer function is valid before use.
            nx_ipv4_packet_receive.c                         Fixed a bug in source check when address mapping is not needed.
            nx_ipv6_fragment_process.c                       Fixed offset of fragment packets.
            nx_ipv6_multicast_leave.c                        Removed unreachable code.
            nx_ipv6_multicast_join.c                         Removed unreachable code.
            nx_ipv6_option_error.c                           Removed duplicated check for function pointer.
            nx_ipv6_packet_copy.c                            Fixed a bug that four extra bytes were incorrectly copied.
            nx_ipv6_packet_send.c                            Removed fragment check when IPsec is disabled for PMTU, stored IP header for outgoing packet.
            nx_ipv6_prefix_list_add_entry.c                  Fixed a bug that prefix was not sorted.
                                                               Removed unused argument.
            nx_ipv6_prefix_list_delete_entry.c               Optimized the logic to find address.
            nx_ipv6_process_hop_by_hop_option.c              Eliminated unreachable code.
            nx_ipv6_util.c                                   Removed unnecessary NULL check in IPv6_Address_Type.
            nx_mld.h                                         Cleaned up this file.
            nx_packet_allocate.c                             Moved packet type check from _nxe_packet_allocate since
                                                               it is necessary when _nx_packet_allocate is called
                                                               by internal functions.
            nx_packet_copy.c                                 Copied the data of the first packet beginning at data starting position.
                                                               Fixed the bug for ip header pointer set.
            nx_packet_pool_create.c                          Removed unreachable code.
            nx_ram_network_driver.c                          Removed unused parameter in _nx_ram_network_driver_output.
                                                               Supported more commands.
            nx_rarp_packet_receive.c                         Continued RARP when address mapping needed.
            nx_tcp.h                                         Defined the TCP minimum acceptable MSS.
                                                               Added missing TCP function declarations.
            nx_tcp_client_socket_unbind.c                    Limited the socket state to closed only.
            nx_tcp_fast_periodic_processing.c                Modified the logic for zero window probe.
                                                               Updated ACK number and window size for retransmitted packet.
            nx_tcp_packet_process.c                          Fixed invalid source address check.
                                                               Improved statistics of invalid packet.
                                                               Optimized the logic of processing RST packet for listen queue.
            nx_tcp_periodic_processing.c                     Updated the retries to reach the max value.
            nx_tcp_server_socket_accept.c                    Removed unreachable code.
            nx_tcp_server_socket_unlisten.c                  Reset the socket state only when it was listening.
            nx_tcp_socket_create.c                           Removed duplicated check for window size.
            nx_tcp_socket_send_internal.c                    Modified the wait time.
                                                               Removed the TCP transmit suspended count limitation.
                                                               Modified to release IP mutex protection before a blocking call.
                                                               Replaced NX_NO_WAIT with the input wait_option in nx_packet_allocate, nx_packet_data_append.
                                                               Removed duplicated error check.
                                                               Optimized the logic of processing sending packet.
                                                               Fixed the alignment of subsequent packet in chain.
            nx_tcp_socket_disconnect.c                       Removed check for transmit queue when connection was not established.
                                                               Called the cleanup routines after completed the tcp disconnected operation.
            nx_tcp_socket_packet_process.c                   Removed the data check in CLOSE WAIT state.
                                                               Checked ACK for LAST ACK and CLOSING state.
                                                               Checked socket state before processing data.
                                                               Fixed a bug that the receive window can not recover.
            nx_tcp_socket_receive.c                          Modified the logic for SWS avoidance algorithm.
            nx_tcp_socket_state_ack_check.c                  Corrected the processing procedure for SYN/ACK bits.
                                                               Modified the logic to adjust congestion window during slow start and congestion avoidance.
                                                               Fixed a bug in ACK check logic if the packet was not transmitted by driver.
                                                               Stored IP header for outgoing packet.
            nx_tcp_socket_state_closing.c                    Removed sending ACK message code if ACK did not acknowledge FIN.
            nx_tcp_socket_state_data_check.c                 Fixed the ACKed packets in order.
                                                               Fixed the bug for updating receive window.
                                                               Trimmed the data that out of receive window.
                                                               Optimized the logic when a packet with old data is received.
                                                               Modified the logic for SWS avoidance algorithm.
            nx_tcp_socket_state_established.c                Removed unused parameter.
            nx_tcp_socket_state_last_ack.c                   Removed sending ACK message code if ACK did not acknowledge FIN.
            nx_tcp_socket_state_syn_sent.c                   Fixed sequence number for simultaneous connection.
                                                               Checked maximum value of window scale when it was set.
            nx_tcp_socket_state_syn_received.c               Updated tx_window_advertised value.
                                                               Checked maximum value of window scale when it was set.
                                                               Removed duplicated out of window check.
            nx_tcp_window_scaling_option_get.c               Limited the maximum value of window scale.
            nx_nd_cache_init.c                               Removed the status check for TX API since internal call should be succeed.
            nx_nd_cache_interface_entries_delete.c           Removed duplicated deletion for destination table.
            nx_tcp_packet_send_rst.c                         Modified reset ack number, sequence number and ACK bit according to incoming packet ACK bit.
            nx_tcp_server_socket_relisten.c                  Released the protection before return.
            nx_udp_packet_receive.c                          Removed duplicated check for function pointer.
            nx_user.h                                        Added ASSERT macros. Remvoed unused macros.
                                                               Added macros defined in nx_api.h but not in nx_user.h.
                                                               Sorted options by module.
            nxd_ip_raw_packet_source_send.c                  Removed duplicate check for raw service enabled.
            nxd_ipv6_address_delete.c                        Fixed a bug that if_index may be used before initialized.
            nxd_ipv6_address_set.c                           Fixed a bug that mutex is not released before return.
                                                               Fixed link local duplicate address set.
            nxd_ipv6_default_router_add_internal.c           Returned error status when router table was full.
            nxd_ipv6_default_router_delete.c                 Returned error status when router table was not found.
            nxd_ipv6_default_router_entry_get.c              Optimized logic comparing the interface.
            nxd_ipv6_default_router_get.c                    Used the logic of _nxd_ipv6_default_router_entry_get.
            nxd_ipv6_destination_table_find_next_hop.c       Removed unused argument.
            nxd_ipv6_disable.c                               Cleaned up ND_CACHE when ICMP was enabled.
            nxd_ipv6_enable.c                                Corrected retransmit timer when it is zero.
            nxd_ipv6_interface_find.c                        Used first up interface for link local multicast.
                                                               Fixed null pointer access.
            nxd_nd_cache_entry_delete.c                      Removed duplicated deletion for destination table.
            nxd_tcp_client_socket_connect.c                  Fixed the bug for address version check, updated the header size.
                                                               Fixed loopback destination.
                                                               Fixed the bug for socket state since it is updated in connect cleanup.
            nxd_udp_socket_send.c                            Fixed statistics when IPv6 address was not valid.
            nxde_ip_raw_packet_source_send.c                 Added the check for packet pointer.
            nxde_ipv6_address_change_notify.c                Checked calling thread.
            nxde_ipv6_address_set.c                          Filtered address that was not unicast type.
            nxde_udp_socket_send.c                           Fixed checking for header area of packet.
            nxde_udp_socket_source_send.c                    Added the check for packet pointer.
            nxe_arp_dynamic_entry_set.c                      Added the check for IP address.
            nxe_arp_ip_address_find.c                        Added the check for invalid physical address.
            nxe_arp_static_entry_create.c                    Added the check for invalid physical address.
                                                               Added the check for IP address.
            nxe_arp_static_entry_delete.c                    Added the check for invalid physical address.
            nxe_ip_create.c                                  Added the priority check.
            nxe_packet_allocate.c                            Moved packet type check to _nx_packet_allocate since
                                                               it is necessary when _nx_packet_allocate is called
                                                               by internal functions.
            nxe_tcp_socket_create.c                          Checked window size when window scale was not enabled.
            nxe_tcp_socket_send.c                            Fixed checking for header area of packet.
            nxe_tcp_socket_disconnect_complete_notify.c      Added the check for input parameters.
            nxe_tcp_socket_establish_notify.c                Added the check for input parameters.
            nxe_tcp_socket_timed_wait_callback.c             Added the check for input parameters.
            nxe_udp_socket_send.c                            Fixed checking for header area of packet.
            nxe_udp_socket_source_send.c                     Fixed checking for header area of packet.


01/12/2015  NetX Duo generic code version 5.8. This release includes the
            following major features:


        Files are modified to remove deprecated macro for IPv6 path MTU:
            nx_icmpv6.h
            nx_user.h


        Files are added or modified to support ipv4 multicast feature:
            nx_ipv4_multicast_interface_join.c
            nx_ipv4_multicast_interface_leave.c
            nxe_ipv4_multicast_interface_join.c
            nxe_ipv4_multicast_interface_leave.c


        Files are modified to fix compiler warnings:
            nx_arp_packet_receive.c
            nx_icmpv4_packet_process.c
            nx_icmpv6.h
            nx_icmpv6_dest_table_find.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_queued_packets.c
            nx_icmpv6_send_rs.c
            nx_icmpv6_validate_neighbor_message.c
            nx_icmpv6_validate_ra.c
            nx_igmp_packet_process.c
            nx_igmp_periodic_processing.c
            nx_invalidate_destination_entry.c
            nx_ip_checksum_compute.c
            nx_ip_dispatch_process.c
            nx_ip_forward_packet_process.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_packet.c
            nx_ip_packet_receive.c
            nx_ipv4_packet_receive.c
            nx_ipv6_address_find_prefix.c
            nx_ipv6_fragment_process.c
            nx_ipv6_option_error.c
            nx_ipv6_packet_copy.c
            nx_ipv6_packet_receive.c
            nx_ipv6_packet_send.c
            nx_ipv6_prefix_list_add_entry.c
            nx_ipv6_process_fragment_option.c
            nx_ipv6_process_hop_by_hop_option.c
            nx_ipv6_process_routing_option.c
            nx_ipv6_util.c
            nx_nd_cache_add.c
            nx_nd_cache_add_entry.c
            nx_nd_cache_find_entry.c
            nx_packet_copy.c
            nx_packet_data_append.c
            nx_packet_data_retrieve.c
            nx_tcp_no_connection_reset.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_rst.c
            nx_tcp_packet_send_syn.c
            nx_tcp_socket_bytes_available.c
            nx_tcp_socket_mss_set.c
            nx_tcp_socket_send.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_udp_packet_receive.c
            nx_udp_socket_receive.c
            nxd_ipv6_address_set.c
            nxd_ipv6_default_router_add_internal.c
            nxd_ipv6_default_router_entry_get.c
            nxd_ipv6_default_router_get.c
            nxd_ipv6_destination_table_find_next_hop.c
            nxd_ipv6_disable.c
            nxd_ipv6_interface_find.c
            nxd_ipv6_prefix_router_timer_tick.c
            nxd_ipv6_search_onlink.c
            nxd_nd_cache_hardware_address_find.c
            nxd_nd_cache_ip_address_find.c
            nxd_tcp_client_socket_connect.c
            nxd_udp_socket_send.c
            nxde_icmp_ping.c
            nxde_icmp_source_ping.c
            nxde_ip_raw_packet_send.c
            nxe_ip_create.c
            nxe_packet_pool_create.c
            nxe_tcp_socket_create.c
            nxe_tcp_socket_send.c
            nxe_udp_socket_create.c
            nxe_udp_socket_send.c
            nxe_udp_source_extract.c


        Files are modified to optimize NX_PACKET_STRUCT:
            nx_api.h
            nx_arp_dynamic_entry_set.c
            nx_arp_packet_receive.c
            nx_arp_packet_send.c
            nx_icmp_interface_ping6.c
            nx_icmp_ping.c
            nx_icmpv4_packet_process.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_packet_too_big.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_process_redirect.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_queued_packets.c
            nx_icmpv6_send_rs.c
            nx_igmp_packet_process.c
            nx_igmp_periodic_processing.c
            nx_ip_dispatch_process.c
            nx_ip_forward_packet_process.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_disable.c
            nx_ip_fragment_packet.c
            nx_ip_fragment_timeout_check.c
            nx_ip_packet_receive.c
            nx_ip_packet_send.c
            nx_ip_raw_packet_send.c
            nx_ip_raw_packet_source_send.c
            nx_ipv4.h
            nx_ipv4_packet_receive.c
            nx_ipv6.h
            nx_ipv6_fragment_process.c
            nx_ipv6_packet_receive.c
            nx_ipv6_packet_send.c
            nx_packet_allocate.c
            nx_packet_copy.c
            nx_packet_data_append.c
            nx_packet_data_extract_offset.c
            nx_packet_pool_create.c
            nx_packet_release.c
            nx_packet_transmit_release.c
            nx_ram_network_driver.c
            nx_rarp_packet_receive.c
            nx_rarp_packet_send.c
            nx_tcp_fast_periodic_processing.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_rst.c
            nx_tcp_packet_send_syn.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_socket_bytes_available.c
            nx_tcp_socket_receive.c
            nx_tcp_socket_receive_queue_flush.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_tcp_socket_state_transmit_check.c
            nx_tcp_socket_transmit_queue_flush.c
            nx_udp_socket_receive.c
            nx_udp_socket_source_send.c
            nxd_ip_raw_packet_source_send.c
            nxd_ipv6_raw_packet_send_internal.c
            nxd_udp_packet_info_extract.c
            nxd_udp_socket_send.c
            nxd_udp_socket_source_send.c
            nxde_udp_packet_info_extract.c
            nxde_udp_socket_send.c
            nxe_ip_raw_packet_send.c
            nxe_ip_raw_packet_source_send.c
            nxe_tcp_socket_send.c
            nxe_udp_packet_info_extract.c
            nxe_udp_socket_send.c
            nxe_udp_socket_source_send.c


        Files are modified to support the dual packet pool feature:
            nx_api.h
            nx_arp_gratuitous_send.c
            nx_arp_packet_send.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_igmp_periodic_processing.c
            nx_ip_create.c
            nx_ip_auxiliary_packet_pool_set.c
            nx_rarp_packet_send.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_rst.c
            nx_tcp_packet_send_syn.c
            nx_user.h
            nxe_ip_auxiliary_packet_pool_set.c


        Files are modified to optimize NX_UDP_SOCKET_STRUCT:
            nx_api.h
            nx_udp_socket_create.c
            nxd_udp_socket_send.c


        Files are added or modified to support the link status change feature:
            nx_api.h
            nx_arp_interface_entries_delete.c
            nx_icmpv6.h
            nx_ip.h
            nx_ip_deferred_link_status_process.c
            nx_ip_driver_link_status_event.c
            nx_ip_link_status_change_notify_set.c
            nx_ip_thread_entry.c
            nx_nd_cache_interface_entries_delete.c
            nxe_ip_link_status_change_notify_set.c


        Files are added or modified in order to fact out the IPv4 packet transmit process:
            nx_ip_driver_packet_send.c
            nx_ip_header_add.c
            nx_ip_packet_send.c


        Files are modified to consolidate IGMP-related data structure in the IP instance:
            nx_api.h
            nx_igmp_multicast_check.c
            nx_igmp_packet_process.c
            nx_igmp_periodic_processing.c
            nx_ip_packet_send.c


        Files are added or modified to support the simple IPv4 routing and the NAT feature:
            nx_api.h
            nx_icmpv4_packet_process.c
            nx_ip_forward_packet_process.c
            nx_ip_fragment_forward_packet.c
            nx_ip_packet_send.c
            nx_ipv4_packet_receive.c
            nx_tcp_free_port_find.c
            nx_tcp_client_socket_bind
            nx_tcp_no_connection_reset.c
            nx_tcp_packet_process.c
            nx_tcp_server_socket_listen
            nx_tcp_server_socket_relisten.c
            nx_udp_free_port_find.c
            nx_udp_socket_bind.c
            nx_user.h


        Files are modified to support user defined random function:
            nx_api.h


        Files are modified to support the router advertisement flag callback feature:
            nx_api.h
            nx_icmpv6.h
            nx_icmpv6_process_ra.c
            nxd_icmpv6_ra_flag_callback_set.c
            nxde_icmpv6_ra_flag_callback_set.c


        Files are modified to support the ARP conflict defend feature:
            nx_api.h
            nx_arp_packet_receive.c
            nx_arp_periodic_update.c
            nx_ip_address_set.c
            nx_ip_interface_address_set.c
            nx_user.h


        Files are added or modified to optimized the logic for ARP dynamic entry deletion:
            nx_arp_dynamic_entries_invalidate.c
            nx_arp_dynamic_entry_delete.c
            nx_arp_entry_allocate.c
            nx_arp_entry_delete.c
            nxe_arp_entry_delete.c
            nx_arp_static_entry_delete.c
            nx_arp_static_entry_delete_internal.c
            nx_ip_create.c


        Files are added or modified to support IPv4 multicast join and leave feature:
            nx_igmp.h
            nx_igmp_multicast_interface_join.c
            nx_igmp_multicast_interface_join_internal.c
            nx_igmp_multicast_interface_leave.c
            nx_igmp_multicast_interface_leave_internal.c
            nx_igmp_multicast_join.c
            nx_igmp_multicast_leave.c
            nx_igmp_packet_process.c
            nx_igmp_periodic_processing.c
            nxe_igmp_multicast_interface_join_internal.c
            nxe_igmp_multicast_interface_leave.c
            nxe_igmp_multicast_interface_leave_internal.c


        Files are modified to support the router alert feature:
            nx_igmp_periodic_processing.c
            nx_ip_fragment_packet.c
            nx_ip_packet_send.c
            nx_ipv4.h


        Other modified files:
            nx_api.h                          Added new APIs for ipv4 multicast and interface detach, added definition of reassembly
                                                added definition of reassembly time, added new service nx_ip_gateway_address_clear,
                                                removed duplicate declarations, mapped the old APIs to new APIs, fixed a bug that
                                                nx_ipv4_packet_receive is mapped to _nx_igmp_multicast_leave_internal which is nonexistent.
            nx_arp.h                          Added new APIs for ARP dynamic entry delete, static entry delete internal and interface entries
                                                delete, added ARP defend deature.
            nx_arp_packet_receive.c           Fixed that packet is used after released,
                                                added a feature that responds to a conflict GARP packet,
                                                added an ARP man in the middle detection feature (NX_ARP_MAC_CHANGE_NOTIFICATION_ENABLE),
                                                blocked adding entries to ARP cache with zero sender IP address,
                                                prevent an ARP request matching an ARP entry sender address to change the mac address.
            nx_arp_static_entry_create.c      Fixed a bug that interface is not initialized before used.
            nx_icmp_interface_ping6.c         Fixed a bug for sequence when nx_ip_icmp_sequence is greater than 65535.
            nx_icmpv4_packet_process.c        Fixed checksum zero for echo reply packet.
            nx_icmpv6_DAD_failure.c           Fixed a bug that address was not removed from interface.
            nx_icmpv6_perform_DAD.c           Optimized process logic.
            nx_icmpv6_send_error_message.c    Fixed endianness of the offending packet, fixed handling multicast packet,
                                                added logic to ensure data to copy does not exceed the ICMPv6 packet boundary.
            nx_icmpv6_send_queued_packets.c   Fixed the bug for unspecified address check.
                                              Cleaned up the nd_entry after fragment processing.
            nx_icmpv6_packet_process          Modified the logic of checksum calculation.
            nx_icmpv6_dest_table_add.c        Protected cache with mutex nx_nd_cache_protection.
            nx_icmpv6_process_redirect.c      Protected cache with mutex nx_nd_cache_protection.
            nx_ip.h                           Added new service nx_ip_gateway_clear,
                                                added function to compute checksum for fragments,
            nx_ipv4.h                         Added new service nx_ip_gatewar_clear.
            nx_ip_create.c                    Supported loopback interface capability,
            nx_ip_checksum_compute.c          Optimized the logic.
                                                fixed a bug when the priority of the calling thread is lower than IP thread.
            nx_ip_fragment_assembly.c         Added definition of reassembly time, fixed a bug in fragment queue.
            nx_ip_fragment_packet.c           Fixed checksum calculation when fragment is performed,
                                                copied interface from header packet, fixed size of each fragment,
                                                fixed a bug that NX_DISABLE_IP_TX_CHECKSUM option was ignored.
            nx_ip_fragment_timeout_check.c    Fixed the endian of offset flag before sending ICMPv6 error message.
                                                Fixed a problem with reset of the tail fragment.
                                                Fixed an error for reconnecting around a dropped fragment.
            nx_ip_gateway_address_set.c       Modified the logic to disallow a zero IP address.
            nx_ip_packet_receive.c            Added packet drop statisics for invalid packet.
            nx_ip_packet_send.c               Fixed destination address for non local network,
                                                fixed a bug in loopback interface processing,
                                                optimized the logic,
            nx_ip_route_find.c                Fixed a bug in loopback interface processing,
                                                skipped interface which is down when finding route and gateway.
            nx_ip_raw_packet_processing.c     Fixed a bug that interrupt is not restored when no thread waiting for packets.
            nx_ip_static_route_add.c          Fixed a bug that route table may overflow,
                                                added interface record when shifting route entries,
                                                fixed a bug that unsigned number overflows.
            nx_ip_static_route_delete.c       Added interface record when shifting route entries.
            nx_ip_max_payload_size_find.c     Fixed a bug that src_address was set incorrectly,
                                                removed unnecessary check for NULL pointer of IPv6 address.
            nx_ipv4_packet_receive.c          Supported processing fragmentation immediately,
                                                supported checking for source IP address.
                                                added a feature that receive unicast DHCP message.
            nx_ipv6_fragment_process.c        Fixed checksum calculation when fragment is performed,
                                                used the same packet pool for original packet and fragmentations.
                                              Increased the IP packet and bytes sent count.
            nx_ipv6_packet_copy.c             Fixed copy length check for destination packet.
            nx_ipv6_packet_send.c             Fixed checksum calculation when fragment is performed, optimized the logic.
            nx_ipv6_prefix_list_delete_entry.c
                                              Fixed IPv6 address when leave multicast group.
            nx_ipv6_process_fragment_option.c Supported processing fragmentation immediately,
                                                fixed the endian of offset flag before sending ICMPv6 error message.
            nxd_ip_raw_packet_source_send.c   Fixed source address selection for IPv6.
            nxd_ipv6_address_set.c            Fixed duplicate address set, fixed a bug when ip_address is null.
            nxd_ipv6_default_router_add_internal.c
                                              Checked router address whether it is reachable.
            nxd_ipv6_default_router_get.c     Got index from interface.
            nxd_ipv6_default_router_number_of_entries_get.c
                                              Got index from interface.
            nxd_ipv6_disable.c                Supported loopback address. Fixed a compiler error.
            nxd_ipv6_enable.c                 Supported loopback address.
            nxd_ipv6_interface_find.c         Fixed return status when there is no address in interface,
                                                supported loopback address, checked interface link status.
            nxd_ipv6_raw_packet_send_internal.c
                                              Fixed source address selection for IPv6.
            nxd_ipv6_stateless_address_autoconfig_enable.c
                                              Reset the solicitation count.
            nxd_ipv6_stateless_address_autoconfig_disable.c
                                              Reset the solicitation count.
            nxd_ipv6_multicast_interafce_leave.c
                                              Fixed the bug that return success status when find the same entry.
            nx_nd_cache.h                     Updated time of ND cache to RFC recommended values.
            nx_nd_cache_add.c                 Protected cache with mutex nx_nd_cache_protection.
            nx_nd_cache_find_entry.c          Removed the mutex release that is not necessary.
            nx_nd_cache_find_entry_by_mac_addr.c
                                              Fixed a bug that check the interface pointer before use.
            nxd_nd_cache_entry_delete.c       Fixed a bug that mutex is not released before return.
            nx_packet_copy.c                  Removed the size check to avoid failure to copy for chain packet.
            nx_packet_data_extract_offset.c   Used memcpy to optmize data copy.
            nx_packet_data_retrieve.c         Used memcpy to optmize data copy.
            nx_packet_data_append.c           Fixed a bug that releases already released packet.
            nx_packet_pool_create.c           Cleared pool structure before used.
            nx_tcp_mss_option_get.c           Fixed endless loop when option length is not set.
            nx_tcp_packet_process.c           Checked source address for syn packets that are queued.
            nx_tcp_server_socket_relisten.c   Fixed a bug that syn_received_notify was not called.
            nx_tcp_socket_delete.c            Not allowed to delete before resources are cleaned.
            nx_tcp_socket_packet_process.c    Fixed a bug ACKs, URGs, RSTs should be processed even sequence
                                                is out of window.
            nx_tcp_socket_send.c:             Moved process logic to internal function.
            nx_tcp_socket_send_internal.c     Fixed a bug when socket is not connected, supported
                                                to send small segmentation when length of packet is less than window size.
            nx_tcp_socket_state_ack_check.c   Fixed cwnd calculation. Fixed window size when ACK is duplicated.
            nx_tcp_socket_state_data_check.c  Supported to limit the number of packets that are out of order.
            nx_tcp_socket_state_transmit_check.c
                                              Moved logic when window size is non zero to send internal function.
            nx_tcp_transmit_cleanup.c         Removed adjusting sequence since packet in queue would
                                                never contain TCP header.
            nx_user.h                         Added definition for IP reassembly time,
                                                added symbol that allow IP fragment reassemble immediately,
                                                updated time of ND cache to RFC recommended values,
                                                added source address check for incoming packet,
                                                supported to limit the number of packets that are out of order.
            nx_udp_packet_receive.c           Fixed the endian of UDP header before sending ICMPv6 error message.
            nx_udp_socket_delete.c            Removed error checking that has been checked in nxe.
            nx_udp_socket_receive.c           Set packet pointer to NULL if no packet was available.
                                                Removed special process of all ones checksum.
            nxd_udp_socket_send.c             Fixed source address selection for IPv6.
            nxe_icmp_interface_ping6.c        Checked interface validity.
            nxde_icmp_source_ping.c           Checked interface validity.
            nxe_igmp_multicast_interface_join.c
                                              Fixed the bug for IP protectio operation.
            nxe_ip_gateway_address_set.c
                                              Added the interface status check.
            nxe_ip_interface_attach.c         Modified invalid IP address check.
            nxe_ip_interface_physical_address_get.c
                                              Fixed a dead recursive call bug.
            nxe_ip_interface_status_check.c   Added interface validation checking.
            nxde_ip_raw_packet_source_send.c  Fixed address_index check.
            nxde_ipv6_stateless_address_autoconfig_enable.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_stateless_address_autoconfig_disable.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_multicast_interface_leave.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_multicast_interface_join.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_default_router_number_of_entries_get.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_default_router_get.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_default_router_entry_get.c
                                              Modified the comment and fixed the bug.
            nxde_ipv6_address_delete.c
                                              Modified the comment and fixed the bug.
            nxde_nd_cache_entry_set           Added the ID check for IP instance.
            nxe_packet_release.c              Modified the return value.
            nxe_packet_transmit_release.c     Modified the return value.
            nxe_tcp_client_socket_connect.c   Added server address check,
            nxe_tcp_socket_queue_depth_notify_set.c
                                              Added input parameters check,
            nxe_tcp_socket_receive_notify.c   Added input parameters check,
            nxe_tcp_socket_transmit_configure.c
                                              Added tcp feature check,
            nxe_tcp_socket_window_update_notify_set.c
                                              Added input parameters check,
            nxe_udp_socket_source_send.c      Improved the error checking logic.
            nx_ram_network_driver.c           Received special MAC address for IPv6 multicast address,
                                              Correctly set the next IP.

        Files added:
            nx_ip_gateway_address_clear.c
            nx_ip_interface_detach.c
            nx_ip_packet_checksum_compute.c
            nxe_ip_gateway_address_clear.c
            nxe_ip_interface_detach.c





01/31/2013  NetX Duo generic code version 5.7. This release includes the
            following major features:


        Files are modified to allow conditional compilation for IP fragmentation support:
            nx_arp_dynamic_entry_set.c
            nx_arp_packet_receive.c
            nx_ip_fragment_disable.c
            nx_ip_fragment_enable.c
            nx_ip_fragment_packet.c
            nx_ip_fragment_timeout_check.c
            nx_ip_info_get.c
            nx_ip_packet_send.c
            nx_ipv6_packet_send.c
            nx_ipv6_process_fragment_option.c


        Files are added or modified to support the interface capability feature:
            nx_icmp_interface_ping6.c
            nx_icmp_ping.c
            nx_icmpv4_packet_process.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c
            nx_igmp_multicast_leave.c
            nx_igmp_packet_process.c
            nx_igmp_periodic_processing.c
            nx_ip_checksum_compute.c
            nx_ip_interface_capability_get.c
            nx_ip_interface_capability_set.c
            nx_ip_fragment_packet.c
            nx_ip_packet_send.c
            nx_ip_thread_entry.c
            nx_ipv4_packet_receive.c
            nx_ipv6_packet_send.c
            nx_packet_allocate.c
            nx_packet_copy.c
            nx_packet_release.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_rst.c
            nx_tcp_packet_send_syn.c
            nx_tcp_socket_send_internal.c
            nx_udp_socket_receive.c
            nxd_udp_socket_send.c
            nxe_ip_interface_capability_get.c
            nxe_ip_interface_capability_set.c


        Files are modified to allow the chained packet feature to be removed:
            nx_packet_allocate.c
            nx_packet_copy.c
            nx_packet_data_append.c
            nx_packet_data_extract_offset.c
            nx_packet_data_retrieve.c
            nx_packet_release.c


        Files are added or modified to support the IPv6 address change notify feature:
            nx_icmpv6_DAD_failure.c
            nx_icmpv6_perform_DAD.c
            nx_icmpv6_process_ra.c
            nx_ipv6_prefix_list_delete.c
            nx_ipv6_prefix_list_delete_entry.c
            nxd_ipv6_address_change_notify.c
            nxd_ipv6_address_delete.c
            nxd_ipv6_address_set.c
            nxde_ipv6_address_change_notify.c


        Files are added or modified to support the IP raw filter feature and
        the raw receive queue depth feature:
            nx_ip_raw_packet_enable.c
            nx_ip_raw_packet_filter_set.c
            nx_ip_raw_packet_processing.c
            nx_ip_raw_receive_queue_max_set.c
            nxe_ip_raw_packet_filter_set.c
            nxe_ip_raw_receive_queue_max_set.c


        Files are modified to reset the TCP internal timer when closing a socket:
            nx_tcp_client_socket_unbind.c
            nx_tcp_server_socket_accept.c
            nx_tcp_server_socket_listen.c
            nx_tcp_server_socket_relisten.c
            nx_tcp_server_socket_unaccept.c
            nx_tcp_server_socket_unlisten.c
            nx_tcp_socket_state_fin_wait2.c
            nx_tcp_socket_state_syn_received.c


        Other modified files:
          nx_arp_enable.c                         Cleaned up redundant logic.
          nx_icmpv6_dest_table_add.c              Protected cache with mutex nx_nd_cache_protection.
          nx_icmpv6_process_na.c                  Modified the logic to set incoming interface to be the
                                                    address requested in the NA message.
          nx_icmpv6_process_redirect.c            Protected cache with mutex nx_nd_cache_protection.
          nx_icmpv6_send_queued_packets.c         Convert destination address to host byte order before
                                                    calling nx_icmpv6_dest_table_find.
          nx_igmp_periodic_processing.c           Fixed a bug preventing the loop from decrementing all
                                                    group update times.
          nx_ip_create.c                          Initializes the device table and the address table.
          nx_ip_dispatch_process.c                Added upper layer protocol processing for IPv4
          nx_ip_driver_direct_command.c           Modified function name
          nx_ip_fragment_assembly.c               Simplified the logic by calling nx_ip_dispatch_process()
                                                    for processing upper layer protocols.
          nx_ip_fragment_packet.c                 Removed an extra alignment check
          nx_ip_max_payload_size_find.c           Added a case for IPsec
          nx_ip_raw_packet_source_send.c          Modified the constant for the raw packet type
          nx_ip_raw_packet_send.c                 Modified the constant for the raw packet type
          nx_ip_static_route_add.c                Record the physical interface the route is attached to.
          nx_ipv4_packet_receive.c                Simplified the logic by calling nx_ip_dispatch_process()
                                                    for processing upper layer protocols.
          nx_ipv6_fragment_process.c              Fixed a compiler warning.
          nx_ipv6_packet_receive.c                Added IPv6 multicast support
          nx_ipv6_packet_send.c                   Fixed a bug in the logic that does the IPv6 address
                                                    search, added a case where IPv6 address to MAC address
                                                    mapping is not needed.
          nx_ipv6_prefix_list_delete.c            Optimized the logic that computes the interface index.
          nx_ipv6_util.c                          Fixed the all router multicast address.
          nx_nd_cache_add.c                       Fixed compiler warnings, protected cache with mutex
                                                    nx_nd_cache_protection.
          nx_nd_cache_find_entry.c                Fixed a bug where an incorrect index value is used,
                                                    removed mutex release that is not necessary.
          nx_tcp_fast_periodic_processing.c       Fixed a bug that prevents TCP retry limit to be reached.
          nx_tcp_no_connection_reset.c            Fixed for IPsec.
          nx_tcp_packet_process.c                 Validate MSS value, validate IP address, added internal
                                                    callback function.
          nx_tcp_socket_disconnecte.c             Corrected TCP ACK number when sending a RST.
          nx_tcp_socket_packet_process.c          Improved the handling of validating incoming TCP
                                                    segments.
          nx_tcp_socket_receive.c                 Corrected the logic checking the receive queue against
                                                    the TCP socket state.
          nx_tcp_socket_send.c                    Added logic to handle error status returned from
                                                    nx_tcp_socket_internal to fix a packet leak.
          nx_tcp_socket_state_ack_check.c         Fixed a bug determining if packets can be released from
                                                    the queue when the transmit window wraps, also
                                                    modified the return value.
          nx_tcp_socket_state_data_check.c        Optimized the logic for handling incoming TCP data
                                                    segments.
          nx_tcp_socket_state_syn_received.c      Updated the acknowledged receive sequence.
          nx_tcp_socket_state_syn_sent.c          Fixed a logic for invalid ACK check.
          nx_udp_packet_receive.c                 Fixed compiler warnings.
          nx_udp_socket_source_send.c             Removed redundant code.
          nxd_ip_raw_packet_sourcee_send.c        Added additional parameters this service takes.
          nxd_ip_raw_packet_send.c                Added additional parameters this service takes.
          nxd_ipv6_address_get.c                  Simplified the logic that finds the address index.
          nxd_ipv6_default_router_add_internal.c  Fixed compiler warning.
          nxd_ipv6_interface_find.c               Added IPv6 multicast support, added a case where the
                                                    destination address is an offlink address.
          nxd_ipv6_router_solicitation_check.c    Cleaned up a line of statement.
          nxd_nd_cache_entry_set.c                Bug fix: Use IPv6 address index to find physical
                                                    interface.
          nxd_udp_packet_info_extract.c           Simplified the logic that finds the interface index.
          nxd_udp_socket_send.c                   Making sure the checksum is always generated for
                                                    IPv6 packets.
          nxd_udp_socket_source_send.c            Fixed the IP address detection logic.
          nxde_ip_raw_packet_source_send.c        Added additional parameters this service takes.
          nxde_ip_raw_packet_send.c               Added additional parameters this service takes.


       Files added:
          nx_ip_gateway_address_get.c
          nx_ip_interafce_address_mapping_configure.c
          nx_ip_interface_mtu_set.c
          nx_ip_interface_physical_address_get.c
          nx_ip_interface_physical_address_set.c
          nx_tcp_socket_queue_depth_notify_set.c
          nxd_ipv6_default_router_entry_get.c
          nxd_ipv6_default_router_number_of_entries_get.c
          nxd_ipv6_disable.c
          nxd_ipv6_multicast_interface_join.c
          nxd_ipv6_multicast_interafce_leave.c
          nxd_ipv6_stateless_address_autoconfig_disable.c
          nxd_ipv6_stateless_address_autoconfig_enable.c
          nxde_ipv6_default_router_entry_get.c
          nxde_ipv6_default_router_number_of_entries_get.c
          nxde_ipv6_disable.c
          nxde_ipv6_stateless_address_autoconfig_disable.c
          nxde_ipv6_stateless_address_autoconfig_enable.c
          nxde_ipv6_multicast_interface_join.c
          nxde_ipv6_multicast_interface_leave.c
          nxe_ip_gateway_address_get.c
          nxe_ip_interface_mtu_set.c
          nxe_ip_interface_physical_address_get.c
          nxe_ip_interface_physical_address_set.c
          nxe_tcp_socket_queue_depth_notify_set.c

       Files renamed:

               File Name in Release 5.6                              File Name in Release 5.7

           nx_ip_raw_packet_interface_send.c                      nx_ip_raw_packet_source_send.c
           nx_udp_socket_interface_send.c                         nx_udp_socket_source_send.c
           nxd_ip_raw_packet_interface_send.c                     nxd_ip_raw_packet_source_send.c
           nxd_udp_socket_interface_send.c                        nxd_udp_socket_source_send.c
           nxd_icmp_interface_ping.c                              nxd_icmp_source_ping.c
           nxe_ip_raw_packet_interface_send.c                     nxe_ip_raw_packet_source_send.c
           nxe_udp_socket_interface_send.c                        nxe_udp_socket_source_send.c
           nxde_ip_raw_packet_interface_send.c                    nxde_ip_raw_packet_source_send.c
           nxde_udp_socket_interface_send.c                       nxde_udp_socket_source_send.c
           nxde_icmp_interface_ping.c                             nxde_icmp_source_ping.c





10/10/2011  NetX generic code version 5.6. This release includes the following major features:

          * IPv4 and IPv6 multihome support
          * TCP window scaling
          * Allow applications to configure TCP Keep-alive feature on a per-socket basis
          * Added support for TCP state change callback functions.
          * Allow ICMP checksum operation to be removed
          * Added support for IPsec

        Files modified in order to support multihome
            nx_api.h
            nx_arp.h
            nx_arp_dynamic_entries_invalidate.c
            nx_arp_dynamic_entry_set.c
            nx_arp_gratuitous_send.c
            nx_arp_packet_receive.c
            nx_arp_packet_send.c
            nx_arp_periodic_update.c
            nx_arp_static_entry_create.c
            nx_icmp.h
            nx_icmp_ping.c
            nx_icmp_ping6.c
            nx_icmpv6.h
            nx_icmpv6_DAD_failure.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_process_ra.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_queued_packets.c
            nx_icmpv6_send_rs.c
            nx_icmpv5_packet_process.c
            nx_igmp.h
            nx_igmp_multicast_check.c
            nx_igmp_multicast_join.c
            nx_igmp_multicast_leave.c
            nx_ip.h
            nx_ip_create.c
            nx_ip_delete.c
            nx_ip_dispatch_process.c
            nx_ip_driver_direct_command.c
            nx_ip_fragment_packet.c
            nx_ip_gateway_address_set.c
            nx_ip_max_payload_size_find.c
            nx_ip_packet_receive.c
            nx_ip_packet_send.c
            nx_ip_status_check.c
            nx_ip_thread_entry.c
            nx_ip_static_route_add.c
            nx_ipv4.h
            nx_ipv4_packet_receive.c
            nx_ipv6.h
            nx_ipv6_address_find_prefix.c
            nx_ipv6_fragment_process.c
            nx_ipv6_multicast.c
            nx_ipv6_packet_receive.c
            nx_ipv6_packet_send.c
            nx_ipv6_prefix_list_delete_entry.c
            nx_nd_cache.h
            nx_nd_cache_add.c
            nx_packet_allocate.c
            nx_packet_copy.c
            nx_ram_network_driver.c
            nx_tcp_fast_periodic_processing.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_syn.c
            nx_tcp_socket_mss_set.c
            nx_tcp_socket_send.c
            nx_tcp_socket_state_transmit_check.c
            nx_udp.h
            nx_udp_socket_create.c
            nxd_ip_raw_packet_send.c
            nxd_ipv6_default_router_add.c
            nxd_ipv6_router_solicitation_check.c
            nxd_nd_cache_entry_set.c
            nxd_nd_cache_ip_address_find.c
            nxd_udp_socket_send.c
            nxde_ipv6_default_router_add.c
            nxde_nd_cache_entry_set.c
            nxde_nd_cache_ip_address_find.c
            nxe_arp_gratuitous_send.c
            nxe_igmp_multicast_join.c
            nxe_ip_gateway_address_set.c
            nxe_ip_status_check.c
            nxe_tcp_socket_send.c

        Files changed to allow optionally exclude the ICMPv6 Error Messages feature
            nx_icmpv6.h
            nx_icmpv6_send_error_message.c
            nx_ip_dispatch_process.c
            nx_ip_fragment_assembly.c
            nx_ip_fragment_timeout_check.c
            nx_ipv6_process_fragment_option.c
            nx_ipv6_process_routing_option.c
            nx_udp_packet_receive.c
            nx_user.h

        Files changed to support TCP window scaling:
            nx_tcp.h
            nx_tcp_mss_option_get.c
            nx_tcp_packet_process.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_syn.c
            nx_tcp_socket_create.c
            nx_tcp_socket_send.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_data_check.c
            nx_tcp_socket_state_syn_sent.c
            nx_tcp_socket_state_syn_received.c
            nx_user.h
            nxe_tcp_socket_create.c


        Files changed to support per-socket keepalive option:
            nx_tcp_periodic_processing.c
            nx_tcp_socket_create.c
            nx_tcp_socket_state_ack_check.c
            nx_tcp_socket_state_established.c
            nx_tcp_socket_state_syn_received.c
            nx_tcp_socket_state_syn_sent.c

        Files changed to support TCP state change callback functions:
            nx_tcp.h
            nx_tcp_socket_connection_reset.c
            nx_tcp_socket_create.c
            nx_tcp_socket_state_fin_wait1.c
            nx_tcp_socket_state_fin_wait2.c
            nx_tcp_socket_state_last_ack.c
            nx_tcp_socket_state_syn_received.c

        Added a check to make sure this function only operates on an entry owned by ip_ptr.
            nx_nd_cache_fast_periodic_update.c
            nx_nd_cache_find_entry_by_mac_addr.c
            nx_nd_cache_find_entry_and_add.c
            nx_nd_cache_find_entry.c
            nx_nd_cache_slow_periodic_update.c

        Files changed to allow ICMP checksum operation to be removed:
            nx_icmp_ping.c
            nx_icmpv4_packet_process.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_send_ns.c
            nx_icmpv6_send_rs.c


        Files changed to support IPsec:
            nx_icmp_ping.c
            nx_icmpv4_packet_process.c
            nx_icmpv6_DAD_clear_NDCache_entry.c
            nx_icmpv6_DAD_failure.c
            nx_icmpv6_packet_process.c
            nx_icmpv6_perform_DAD.c
            nx_icmpv6_process_echo_reply.c
            nx_icmpv6_process_echo_request.c
            nx_icmpv6_process_na.c
            nx_icmpv6_process_ns.c
            nx_icmpv6_send_error_message.c
            nx_icmpv6_validate_neighbor_message.c
            nx_ip_dispatch_process.c
            nx_ip_max_payload_size_find.c
            nx_ip_packet_send.c
            nx_ip_thread_entry.c
            nx_ipv4_packet_receive.c
            nx_ipv6_packet_send.c
            nx_ipv6_perform_min_path_MTU_discovery.c
            nx_packet_allocate.c
            nx_packet_copy.c
            nx_tcp_no_connection_reset.c
            nx_tcp_packet_send_ack.c
            nx_tcp_packet_send_fin.c
            nx_tcp_packet_send_rst.c
            nx_tcp_packet_send_syn.c
            nx_tcp_socket_create.c
            nx_tcp_socket_send_internal.c
            nx_udp_packet_receive.c
            nxd_udp_socket_send.c
            nxe_ip_max_payload_size_find.c

        Other modified files:
            nx_api.h                              Added macro NX_PACKET_HEADER_PAD_SIZE to allow an application
                                                  to specify the number of ULONG words padded towards the end of the
                                                  NX_PACKET structure, giving the starting address of the paylaod
                                                  area to a desired alignment.
            nx_icmpv6_dest_table_find.c           Allowed this function to update the path MTU information
            nx_icmpv6_destination_table_periodic_update.c
                                                  Upadted the path MTU logic, optimized the search process
            nx_icmpv6_perform_DAD.c               Added an option that allows caller to specify an IPv6 address for DAD.
            nx_icmpv6_process_echo_reply.c        Added ICMP statistical counter, removed ICMP header before passing the packet
                                                  to the thread
            nx_icmpv6_process_na.c                Optimized the NA packet process
            nx_icmpv6_process_ra.c                Optimized the destination table operation, added ICMP counters
            nx_icmpv6_process_redirect.c          Added ICMP statistical counter, optimized internal operation
            nx_igmp_loopback_disable.c            Added mutex protection
            nx_igmp_loopback_enable.c             Added mutex protection
            nx_igmp_packet_process.c              Allowed IGMP statistical counters to be compiled out,
                                                  impoved the handling of IGMPv1 packets
            nx_ip_address_change_notify.c         Added mutex protection
            nx_ip_address_get.c                   Added mutex protection
            nx_ip_address_set.c                   Added mutex protection
            nx_ip_checksum_compute.c              Fixed a compiler warning when the IPv6 feature is not enabled
            nx_ip_delete.c:                       Clear the nx_ip_id field after the IP internal is cleaned up.
            nx_ip_gateway_address_set.c           Added missing mutex release if no interface found, allow the gateway to be cleared
            nx_ip_fragment_assembly.c             Improved fragment matching per RFC 791, fixed a compiler warning
            nx_ip_packet_receive.c                Added VOID* cast to avoid compiler warnings.
            nx_ip_packet_send.c                   Added check for non null packet interface or next hop (e.g. gateway)
                                                  Fixed a bug where the prepend_ptr was incorrectedly adjusted before
                                                  calling nx_packet_transmit_release.
            nx_ipv6.h                             Added and modified internal API prototypes
            nx_ipv6_fragment_process.c            Release all fragments when discarding a fragment
                                                  Added counter for total_fragments sent.
            nx_ipv6_packet_send.c                 Fixed a bug where the prepend_ptr was incorrectedly adjusted before
                                                  calling nx_packet_transmit_release.
            nx_ipv6_util.h                        Optimized internal operations, added a check for the FF05:: multicast range
            nx_ip_status_check.c:                 Added the configurable wait option NX_IP_STATUS_CHECK_WAIT_TIME
            nx_ipv6_option_error.c                simplify the logic
            nx_ipv6_packet_copy.c                 Fixed a compiler warning
            nx_nd_cache_delete_internal.c         Optimized the destination table search process
            nx_packet_release                     Removed an IPv6 conditional compilation so the IP version field is cleaned up
            nx_rarp_packet_receive.c              Added initialization to avoid compiler warnings
            nx_tcp_mss_option_get.c               Corrected the logic in the option length calculation.
            nx_tcp_no_connection_reset.c          Added a parameter to indicate source IPv6 address to use when sending the RST packet.
            nx_tcp_packet_send_ack.c              Skip TCP checksum calculation if the feature is turned off.
            nx_tcp_packet_send_fin.c              Skip TCP checksum calculation if the feature is turned off.
            nx_tcp_packet_send_rst.c              Skip TCP checksum calculation if the feature is turned off.
            nx_tcp_packet_send_syn.c              Skip TCP checksum calculation if the feature is turned off.
            nx_tcp_socket_packet_process.c        Added check for acceptable RST, moved TCP header optino process into nx_tcp_packet_process
            nx_tcp_periodic_process.c             Added per-socket keep-alive feature.
            nx_tcp_socket_receive                 Optimized internal logic, added netX trace event
                                                  Modified logic to always return a packet in the receive queue regardless of the TCP socket state
            nx_tcp_server_socket_accept.c         Clean up the socket data structure before responding to a new conenction.
            nx_tcp_socket_state_closing.c         Validate the ACK and SEQ number before closing down the socket
            nx_tcp_socket_state_ack_check.c       Fixed a corner case where the ACK number was incorrectly checked
                                                  Fixed another corner case when determining if packets can be released from the transmit queue
                                                  where the transmit window is wrapped.
            nx_udp_packet_receive.c               Optimized internal operations
            nx_udp_socket_bytes_available:        Modified output to error status if the socket port is not bound, corrected return value, fixed comiler warnings
            nx_udp_socket_receive.c               Removed redundant calls to checksum
            nx_user.h                             Added options to remove ICMP checksum computation
            nxd_icmp_enable.c                     Added mutex protection, optimized initilization process
            nxd_ipv6_find_max_prefix_length.c     Optimized the search algorithm
            nxd_ipv6_prefix_router_timer_tick.c   Clean up the destination table when a router times out
            nxd_ipv6_router_lookup.c              Check nd_cache_entry being valid before dereferencing it,
            nxd_ipv6_router_solicitation_check.c  Check router entry valid before updating its timer value optimized the router table search algorithm
            nxd_ipv6_search_onlink.c              Also search manually configured Ipv6 addresses for onlink nodes
            nxd_nd_cache_entry_delete.c           Make sure the ND cache entry exists before deleting it, also invalidated the destination table entry
            nxd_tcp_client_socket_connect.c       Do socket cleanup before sending the SYN packet
            nxde_ip_raw_packet_send.c             Added more error checking logic
            nxde_udp_socket_send.c                Added more error checking logic
            nxe_ip_gateway_address_set.c          Removed a requirement that ARP be enabled before setting IPv4 gateway address and
                                                  removed requirement that the service must be called from a thread
            nxe_ip_max_payload_size_find.c        Replaced source address with an index to the source address
            nxe_ip_static_route_add.c             Added a check to make sure the next hop address is directly reachable.
            nxe_ip_static_route_delete.c          Removed unused code
            nxe_packet_release.c                  Removed unreachable code
            nxe_packet_transmit_release.c         Removed unreachable code


        Files added:
            demo_netx_duo_multihome_tcp.c
            demo_netx_duo_multihome_udp.c
            nx_icmp_interface_ping6.c
            nx_icmpv6_dest_table_add.c
            nx_icmpv6_process_packet_too_big.c
            nx_igmp_multicast_interface_join.c
            nx_ip_driver_interface_direct_command.c
            nx_ip_interface_address_get.c
            nx_ip_interface_address_set.c
            nx_ip_interface_attach.c
            nx_ip_interface_info_get.c
            nx_ip_interface_status_check.c
            nx_ip_raw_packet_interface_send.c
            nx_ip_route_find.c
            nx_nd_cache_add_entry.c
            nx_packet_data_extract_offset.c
            nx_tcp_socket_disconnect_complete_notify.c
            nx_tcp_socket_establish_notify.c
            nx_tcp_socket_send_internal.c
            nx_tcp_socket_timed_wait_callback.c
            nx_tcp_window_scaling_option_get.c
            nx_udp_packet_info_extract.c
            nx_udp_socket_interface_send.c
            nxd_icmp_interface_ping.c
            nxd_ip_raw_packet_interface_send.c
            nxd_ipv6_address_delete.c
            nxd_ipv6_address_get.c
            nxd_ipv6_address_set.c
            nxd_ipv6_default_router_get.c
            nxd_udp_socket_interface_send.c
            nxde_icmp_interface_ping.c
            nxde_ip_raw_packet_interface_send.c
            nxde_ipv6_address_delete.c
            nxde_ipv6_address_get.c
            nxde_ipv6_address_set.c
            nxde_ipv6_default_router_get.c
            nxde_udp_packet_info_extract.c
            nxde_udp_socket_interface_send.c
            nxe_icmp_interface_ping6.c
            nxe_igmp_multicast_interface_join.c
            nxe_ip_driver_interface_direct_command.c
            nxe_ip_interface_address_get.c
            nxe_ip_interface_address_set.c
            nxe_ip_interface_attach.c
            nxe_ip_interface_info_get.c
            nxe_ip_interface_status_check.c
            nxe_ip_raw_packet_interface_send.c
            nxe_packet_data_extract_offset.c
            nxe_tcp_socket_disconnect_complete_notify.c
            nxe_tcp_socket_establish_notify.c
            nxe_tcp_socket_timed_wait_callback.c
            nxe_udp_packet_info_extract.c
            nxe_udp_socket_interface_send.c


        Files removed:
            nx_icmpv6_dest_table_find_and_add.c
            nx_icmpv6_dest_table_find_and_add.c
            nx_ip_static_routing_disable.c
            nx_ip_static_routing_enable.c
            nx_ipv6_process_packet_too_big.c
            nx_nd_cache_find_entry_and_add.c
            nxd_ipv6_interface_address_get.c
            nxd_ipv6_interface_address_set.c
            nxd_ipv6_linklocal_address_get.c
            nxd_ipv6_linklocal_address_set.c
            nxd_udp_socket_set_interface.c
            nxde_ipv6_interface_address_get.c
            nxde_ipv6_interface_address_set.c
            nxde_ipv6_linklocal_address_get.c
            nxde_ipv6_linklocal_address_set.c
            nxde_udp_socket_set_interface.c
            nxe_ip_static_routing_disable.c
            nxe_ip_static_routing_enable.c,


06/01/2010  NetX generic code version 5.5. This release includes the following major features:
            Path MTU Discovery and IPv6 Advertised Link MTU
            Internal debug modules removed (replaced with TraceX events)

            Other modifications are:

            nx_icmpv6_process_ra.c                   Path MTU support
                                                     Fixed bug in Neighbor Discovery cache processing
            nx_icmpv6_process_redirect.c             Path MTU support
            nx_icmpv6_send_error_message.c           Path MTU support
            nx_icmpv6_send_queued_packets.c          Path MTU support
                                                     Fixed a bug where NA packet is received how queued packets requiring fragmentation are sent
            nx_ip_static_route_add.c                 Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nx_ip_static_route_delete.c              Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nx_ip_static_route_find.c                Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nx_ip_static_route_enable.c              Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nx_ip_static_route_disable.c             Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nx_ip_thread_entry.c                     Path MTU support
            nx_ipv6_packet_send.c                    Path MTU support
                                                     Added a check if source and destination IP addresses are the same as part of Denial of service attack,
                                                     Added check for suitable next hop; no packet transmitted if not found by routing algorithm */
                                                     Fixed bug how multicast packets are detected
            nx_tcp_packet_process.c                  Modified RST packets sent in response to invalid data packets to include proper ACK number
            nx_tcp_packet_send_rst.c                 Send a RST with proper ACK number in response to invalid data packet.
            nx_tcp_socket_packet_process.c           Removed duplicate logic that detects and sets MSS number from peer
                                                     Added logic for sending ACKs for out-of-order packet
                                                     Added check for duplicated SYNs
            nx_tcp_socket_state_data_check.c         Modified to send ACKs for out-of-order data packets
                                                     modified handling invalid RST control message
                                                     Added check for duplicated incoming SYNs
                                                     Fixed bug (corner case) handling overlapping sequence numbers
                                                     Make _nx_tcp_socket_state_data_trim and _nx_tcp_socket_state_data_trim_front
                                                     non-static function.
            nx_tcp_socket_state_syn_sent.c           Modified detection and handling of unacceptable ACK before sending RST packet
            nxd_icmp_enable.c                        Path MTU support
            nxd_ipv6_enable.c                        Replaced literal router solicitation parameters with macros defined in nx_user.h
            nxd_ipv6_find_max_prefix_length.c        Optimized the prefix match algorithm
            nxd_udp_socket_send.c                    Corrected placement of IPSec ENABLED conditional code,
                                                     Added check for IPv6 logical outgoing interface
            nxe_ip_static_routing_disable.c          Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nxe_ip_static_routing_enable.c           Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
            nx_icmpv6.h                              Path MTU support
            nx_nd_cache.h                            Removed unused defines for Router and ND protocols
            nx_user.h                                Added #defines for router solicitation parameters
                                                     Added NX_PACKET_HEADER_PAD_SIZE to pad towards the end of the NX_PACKET structure.


11/23/2009  NetX generic code version 5.4. This release includes the following major features:
            Multiple IPv6 address support added
            Path MTU and IPv6 Advertised Link MTU support removed

            Other modifications are:

            nx_ip_fragment_assembly.c                 Added check for invalid length (exceed maximum size limit)
            nx_ip_max_payload_size.c                  New API:computes max packet payload that will not require fragmentation
            nx_ip_packet_send.c                       Corrected NX_IP_LIMITIED_BROADCAST to NX_IP_LIMITED_BROADCAST as destination IP
            nx_ipv6_packet_receive.c                  Added support for multiple IPv6 addresses
            nx_ipv6_packet_send.c                     Made packet fragmentation conditional; if not enabled and fragmentation is required drop the packet
                                                      Added mutex protection around Neighbor Discovery cache table operations
            nx_ipv6_utils.c                           Fixed bug in IPv6_Address_Type() for detecting multicast address type
            nx_tcp_no_connection_reset.c              For socket in CLOSED state, RST packet sequence number set to incoming ACK number
            nx_tcp_fast_periodic_processing.c         Replaced reference to primary IP global address with transmit socket outgoing interface address
            nx_tcp_packet_process.c                   Added call to nxd_tcp_no_connection_reset depending if IPv6 is enabled on the IP instance if a RST
                                                      must be sent
                                                      Update the socket outgoing interface to the received packet interface
            nx_tcp_packet_send_ack.c                  Added support for multiple IPv6 addresses
            nx_tcp_packet_send_fin.c                  Added support for multiple IPv6 addresses
            nx_tcp_packet_send_rst.c                  Added support for multiple IPv6 addresses
            nx_tcp_packet_send_syn.c                  Added support for multiple IPv6 addresses
            nx_tcp_socket_create.c                    Initialize socket outgoing interface with NULL instead of IP global address
            nx_tcp_socket_send.c                      Added support for multiple IPv6 addresses
            nx_tcp_socket_state_data_check.c          Fixed minor compiler warning with conditional coding around IP block pointer declaration
            nx_tcp_socket_state_transmit_check.c      Renamed nx_tcp_window_update_callback_notify with nx_tcp_socket_window_update_notify
                                                      Added support for multiple IPv6 addresses
            nx_tcp_socket_window_update_notify_set.c  Renamed file from  nx_tcp_socket_window_notify to nx_tcp_socket_window_notify_set
            nx_udp_socket_create.c                    Initialize socket outgoing interface with NULL instead of IP global address
            nx_udp_socket_receive.c                   Corrected placement of conditional #defines around extracting packet source and destination address
            nx_udp_source_extract.c                   Modified for performing IPv4 packet extraction only
            nxd_icmp_enable.c                         Removed path MTU support
            nxd_icmp_ping.c                           Added check for IPv6 enabled for sending IPv6 echo request packets
            nxd_ipv6_enabled.c                        Send an error status return if not IPv6 enabled
            nxd_ipv6_find_max_prefix_length.c         New function: finds the longest matching prefix between two IPv6 addresses
            nxd_ipv6_interface_address_get.c          New API: returns IPv6 address and prefix length based in the input interface index
            nxd_ipv6_interface_address_set.c          New API: Sets the IPv6 address and prefix length of the input interface index
            nxd_ipv6_interface_find.c                 Added multiple IPv6 address support
            nxd_ipv6_linklocal_address_get.c          Replace reference to obsoleted IP link local address with IP instance zero index interface (designated
                                                      link local)
            nxd_ipv6_linklocal_address_get.c          Replace reference to obsoleted IP link local address with IP instance zero index interface (designated
                                                      link local)
            nxd_ipv6_raw_packet_send_internal.c       Added check for valid IP instance outgoing interface for packet destination
            nx_nd_cache_entry_delete.c                Added TraceX support
            nxd_tcp_client_socket_connect.c           Added support for multiple IPv6 addresses
            nxd_tcp_socket_peer_info_get.c            Added TraceX support
            nxd_udp_socket_send.c                     Added support for multiple IPv6 addresses
            nxd_udp_socket_set_interface.c            Added support for multiple IPv6 addresses
            nxd_udp_source_extract.c                  Optimized the logic for retrieving the IP address
            nxde_ipv6_default_router_add.c            Updated call to nxd_ipv6_default_router_add() based on changes to that function
            nxde_udp_source_extract.c                 Added check for packet with invalid IP header
            nxe_udp_source_extract.c                  Added check for packet with invalid IP header
            nx_nd_cache.h                             Declared two new API, _nxd_nd_cache_entry_delete and _nxd_nd_cache_entry_set
            nx_tcp.h                                  Declared new API, _nxd_tcp_no_connection_reset
            nx_user.h                                 Removed NX_DISABLE_IPV6_PATH_MTU_DISCOVERY



08/03/2009  NetX generic code version 5.3. This release includes the following major features:
            Trace Events support
            IPSec support
            IGMP version 2 support

            Other modifications are:

            nx_igmp_enable.c                        IGMPv2 support
            nx_igmp_multicast_leave.c               IGMPv2 support
            nx_igmp_packet_process.c                IGMPv2 support
            nx_igmp_periodic_processing.c           IGMPv2 support
            nx_ip_checksum_compute.c                When adding last byte to the checksum,
                                                    cast the byte to unsigned short
            nx_ip_fragment_assembly.c               Fixed a packet size computation bug
            nx_ip_packet_send.c                     Use nx_ip_packet_deferred_receive for loopback
            nx_ipv6_packet_send.c                   Use nx_ip_packet_deferred_receive for loopback
            nx_ip_thread_entry.c                    Added IPv6 destination table support
            nx_tcp_socket_state_data_check.c        Optimized TCP out-of-order data receive logic
                                                    Added support for TCP congestion avoidance
            nx_tcp_socket_state_syn_received.c      Added support for TCP congestion avoidance
            nx_tcp_socket_state_syn_sent.c          Added support for TCP congestion avoidance
            nx_tcp_socket_state_transmit_check.c    Added support for TCP congestion avoidance
            nx_tcp_socket_windows_update_notify.c   Added support for TCP congestion avoidance
            nxd_tcp_client_socket_connect.c         Revised TCP loopback connection handling
            nx*.h                                   Modified comment(s).
            nx*.c                                   Modified comment(s).

12/30/2007  Initial NetX Duo generic code version 5.2. This release is based on NetX 5.1 for IPv4 support,
            with features developed for IPv6.
            

2. NetXDuo Secure

08/15/2019  NX Secure generic code version 5.12. This release includes the
            following major features:

        Files are modified to store cipher suite pointer in the session:
            nx_secure_dtls_hash_record.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_send_serverhello.c
            nx_secure_dtls_server_handshake.c
            nx_secure_dtls_verify_mac.c
            nx_secure_tls.h
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_generate_premaster_secret.c
            nx_secure_tls_hash_record.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_server_key_exchange.c
            nx_secure_tls_process_serverhello.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_record_hash_calculate.c
            nx_secure_tls_record_hash_initialize.c
            nx_secure_tls_record_hash_update.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_record_payload_encrypt.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_record.c
            nx_secure_tls_send_server_key_exchange.c
            nx_secure_tls_send_serverhello.c
            nx_secure_tls_server_handshake.c
            nx_secure_tls_session_iv_size_get.c
            nx_secure_tls_session_keys_set.c
            nx_secure_tls_session_reset.c
            nx_secure_tls_verify_mac.c

        Files are modified to optimize RAM usage for remote certificates by
        utilizing otherwise unused space in the TLS packet reassembly buffer
        and parsing the certificates directly within the reassembly buffer:
            nx_secure_tls.h    
            nx_secure_tls_process_record.c    
            nx_secure_tls_process_remote_certificate.c    
            nx_secure_tls_remote_certificate_allocate.c    
            nx_secure_tls_remote_certificate_free_all.c    
            nx_secure_tls_session_packet_buffer_set.c
            nx_secure_tls_session_receive_records.c    
            nx_secure_tls_session_x509_client_verify_configure.c    
            nx_secure_x509.h    
            nxe_secure_tls_session_x509_client_verify_configure.c    

        Files are modified to add TLS session intialization checking:
            nx_secure_tls.h
            nx_secure_tls_session_create.c
            nx_secure_tls_session_delete.c
            nx_secure_tls_session_reset.c
            nxe_secure_dtls_client_protocol_version_override.c
            nxe_secure_dtls_client_session_start.c
            nxe_secure_dtls_packet_allocate.c
            nxe_secure_dtls_psk_add.c
            nxe_secure_dtls_server_session_send.c
            nxe_secure_dtls_server_session_start.c
            nxe_secure_dtls_session_client_info_get.c
            nxe_secure_dtls_session_end.c
            nxe_secure_dtls_session_local_certificate_add.c
            nxe_secure_dtls_session_local_certificate_remove.c
            nxe_secure_dtls_session_receive.c
            nxe_secure_dtls_session_reset.c
            nxe_secure_dtls_session_send.c
            nxe_secure_dtls_session_start.c
            nxe_secure_dtls_session_trusted_certificate_add.c
            nxe_secure_dtls_session_trusted_certificate_remove.c
            nxe_secure_tls_active_certificate_set.c
            nxe_secure_tls_client_psk_set.c
            nxe_secure_tls_local_certificate_add.c
            nxe_secure_tls_local_certificate_find.c
            nxe_secure_tls_local_certificate_remove.c
            nxe_secure_tls_packet_allocate.c
            nxe_secure_tls_psk_add.c
            nxe_secure_tls_remote_certificate_allocate.c
            nxe_secure_tls_remote_certificate_buffer_allocate.c
            nxe_secure_tls_remote_certificate_free_all.c
            nxe_secure_tls_server_certificate_add.c
            nxe_secure_tls_server_certificate_find.c
            nxe_secure_tls_server_certificate_remove.c
            nxe_secure_tls_session_alert_value_get.c
            nxe_secure_tls_session_certificate_callback_set.c
            nxe_secure_tls_session_client_callback_set.c
            nxe_secure_tls_session_client_verify_disable.c
            nxe_secure_tls_session_client_verify_enable.c
            nxe_secure_tls_session_end.c
            nxe_secure_tls_session_packet_buffer_set.c
            nxe_secure_tls_session_protocol_version_override.c
            nxe_secure_tls_session_receive.c
            nxe_secure_tls_session_renegotiate.c
            nxe_secure_tls_session_renegotiate_callback_set.c
            nxe_secure_tls_session_reset.c
            nxe_secure_tls_session_send.c
            nxe_secure_tls_session_server_callback_set.c
            nxe_secure_tls_session_sni_extension_parse.c
            nxe_secure_tls_session_sni_extension_set.c
            nxe_secure_tls_session_start.c
            nxe_secure_tls_session_time_function_set.c
            nxe_secure_tls_session_x509_client_verify_configure.c
            nxe_secure_tls_trusted_certificate_add.c
            nxe_secure_tls_trusted_certificate_remove.c


        Files are modified to fix DTLS version handling:
            nx_secure_dtls_send_clienthello.c
            nx_secure_dtls_send_helloverifyrequest.c
            nx_secure_dtls_server_handshake.c
            nx_secure_dtls_session_start.c

        Files are modified to improve informational error return codes for 
        easier debugging of TLS errors:
            nx_secure_dtls_client_handshake.c    
            nx_secure_dtls_process_clienthello.c    
            nx_secure_dtls_send_clienthello.c    
            nx_secure_dtls_send_serverhello.c    
            nx_secure_dtls_server_handshake.c    
            nx_secure_tls.h    
            nx_secure_tls_map_error_to_alert.c    
            nx_secure_tls_process_client_key_exchange.c    
            nx_secure_tls_process_finished.c    
            nx_secure_tls_process_server_key_exchange.c    
            nx_secure_tls_process_serverhello_extensions.c    
            nx_secure_tls_server_handshake.c    
            nx_secure_tls_ecc_generate_premaster_secret.c    
            nx_secure_tls_ecc_process_certificate_verify.c    
            nx_secure_tls_ecc_process_client_key_exchange.c    
            nx_secure_tls_ecc_process_server_key_exchange.c    
            nx_secure_tls_ecc_send_certificate_verify.c    
            nx_secure_tls_ecc_send_server_key_exchange.c    

        Files are added or modified for the new API 
        "nx_secure_tls_session_alert_value_get":
            nx_secure_dtls_process_record.c
            nx_secure_tls.h    
            nx_secure_tls_api.h    
            nx_secure_tls_session_alert_value_get.c    
            nx_secure_tls_session_start.c
            nxe_secure_tls_session_alert_value_get.c
     
        Files are modified to provide consistent error checking of return
        values from generic NX_CRYPTO cipher routine APIs:
            nx_secure_dtls_hash_record.c
            nx_secure_tls_client_handshake.c
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_handshake_hash_init.c
            nx_secure_tls_hash_record.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_server_handshake.c
            nx_secure_tls_session_keys_set.c
            nx_secure_tls_session_reset.c
            nx_secure_x509_certificate_verify.c
            nx_secure_x509_crl_verify.c
            
        Files are modified to improve the error return code when the
        TLS crypto key buffer is too small for the chosen ciphersuite:
            nx_secure_tls.
            nx_secure_tls_session_keys_set.c

        Files are modified to improve packet length verification:
            nx_secure_dtls_send_clienthello.c
            nx_secure_dtls_send_serverhello.c
            nx_secure_tls_ecc_generate_keys.c
            nx_secure_tls_ecc_send_client_key_exchange.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_serverhello.c

        Files are modified to add caller checking:
            nxe_secure_tls_active_certificate_set.c
            nxe_secure_tls_client_psk_set.c
            nxe_secure_tls_local_certificate_add.c
            nxe_secure_tls_local_certificate_find.c
            nxe_secure_tls_local_certificate_remove.c
            nxe_secure_tls_metadata_size_calculate.c
            nxe_secure_tls_packet_allocate.c
            nxe_secure_tls_psk_add.c
            nxe_secure_tls_remote_certificate_allocate.c
            nxe_secure_tls_remote_certificate_buffer_allocate.c
            nxe_secure_tls_remote_certificate_free_all.c
            nxe_secure_tls_server_certificate_add.c
            nxe_secure_tls_server_certificate_find.c
            nxe_secure_tls_server_certificate_remove.c
            nxe_secure_tls_session_certificate_callback_set.c
            nxe_secure_tls_session_client_callback_set.c
            nxe_secure_tls_session_client_verify_disable.c
            nxe_secure_tls_session_client_verify_enable.c
            nxe_secure_tls_session_create.c
            nxe_secure_tls_session_delete.c
            nxe_secure_tls_session_end.c
            nxe_secure_tls_session_packet_buffer_set.c
            nxe_secure_tls_session_protocol_version_override.c
            nxe_secure_tls_session_receive.c
            nxe_secure_tls_session_renegotiate.c
            nxe_secure_tls_session_renegotiate_callback_set.c
            nxe_secure_tls_session_reset.c
            nxe_secure_tls_session_send.c
            nxe_secure_tls_session_server_callback_set.c
            nxe_secure_tls_session_sni_extension_parse.c
            nxe_secure_tls_session_sni_extension_set.c
            nxe_secure_tls_session_start.c
            nxe_secure_tls_session_time_function_set.c
            nxe_secure_tls_session_x509_client_verify_configure.c
            nxe_secure_tls_trusted_certificate_add.c
            nxe_secure_tls_trusted_certificate_remove.c
            nxe_secure_x509_certificate_initialize.c
            nxe_secure_x509_common_name_dns_check.c
            nxe_secure_x509_crl_revocation_check.c
            nxe_secure_x509_dns_name_initialize.c
            nxe_secure_x509_extended_key_usage_extension_parse.c
            nxe_secure_x509_extension_find.c
            nxe_secure_x509_key_usage_extension_parse.c

        Files are modified to fix static anaylsis reports:
            nx_secure_tls_generate_keys.c
            nx_secure_tls_process_remote_certificate.c
            nx_secure_tls_session_packet_buffer_set.c
            nx_secure_tls_ecc_generate_keys.c
            nx_secure_tls_ecc_send_server_key_exchange.c

        Files are modified to correct self-signed certificate verification
        and support duplicate certificates sent by a remote host:
            nx_secure_tls_process_remote_certificate.c
            nx_secure_x509_certificate_chain_verify.c

        Files are modified to provide RFC 7507 version fallback SCSV support:
            nx_secure_tls_process_clienthello.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_send_clienthello.c
            nx_secure_tls.h
            nx_secure_tls_map_error_to_alert.c
            nx_secure_tls_newest_supported_version.c
            nx_secure_tls_protocol_version_get.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_serverhello_extensions.c
            nx_secure_tls_session_reset.c            

        Files are modified to improve packet length verification:
            nx_secure_dtls_allocate_handshake_packet.c
            nx_secure_dtls_packet_allocate.c
            nx_secure_dtls_process_record.c
            nx_secure_dtls_process_receive_callback.c
            nx_secure_dtls_send_helloverifyrequest.c
            nx_secure_dtls_send_record.c
            nx_secure_dtls_send_serverhello.c
            nx_secure_dtls_session_end.c
            nx_secure_dtls_session_receive.c
            nx_secure_dtls_session_start.c
            nx_secure_tls.h
            nx_secure_tls_allocate_handshake_packet.c
            nx_secure_tls_client_psk_set.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_generate_premaster_secret.c
            nx_secure_tls_packet_allocate.c
            nx_secure_tls_process_clienthello_extensions.c
            nx_secure_tls_process_serverhello.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_send_certificate.c
            nx_secure_tls_send_certificate_request.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_changecipherspec.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_clienthello_extensions.c
            nx_secure_tls_send_finished.c
            nx_secure_tls_send_record.c
            nx_secure_tls_send_server_key_exchange.c
            nx_secure_tls_send_serverhello.c
            nx_secure_tls_send_serverhello_extensions.c
            nx_secure_tls_session_receive_records.c
            nx_secure_tls_verify_mac.c

        Files are modified to add buffer boundary checking in ASN.1 parsing:
            nx_secure_x509.c
            nx_secure_x509.h
            nx_secure_x509_asn1_tlv_block_parse.c
            nx_secure_x509_certificate_revocation_list_parse.c
            nx_secure_x509_crl_revocation_check.c
            nx_secure_x509_distinguished_name_parse.c
            nx_secure_x509_extended_key_usage_extension_parse.c
            nx_secure_x509_extension_find.c
            nx_secure_x509_key_usage_extension_parse.c
            nx_secure_x509_pkcs1_rsa_private_key_parse.c
            nx_secure_x509_pkcs7_decode.c
            nx_secure_x509_subject_alt_names_find.c

        Files are added to support DTLS:
            nx_secure_dtls.h
            nx_secure_dtls_api.h
            nx_secure_dtls_allocate_handshake_packet.c
            nx_secure_dtls_client_handshake.c
            nx_secure_dtls_client_protocol_version_override.c
            nx_secure_dtls_client_session_start.c
            nx_secure_dtls_hash_record.c
            nx_secure_dtls_initialize.c
            nx_secure_dtls_packet_allocate.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_process_handshake_header.c
            nx_secure_dtls_process_header.c
            nx_secure_dtls_process_helloverifyrequest.c
            nx_secure_dtls_process_record.c
            nx_secure_dtls_psk_add.c
            nx_secure_dtls_receive_callback.c
            nx_secure_dtls_retransmit.c
            nx_secure_dtls_retransmit_queue_flush.c
            nx_secure_dtls_send_clienthello.c
            nx_secure_dtls_send_handshake_record.c
            nx_secure_dtls_send_helloverifyrequest.c
            nx_secure_dtls_send_record.c
            nx_secure_dtls_send_serverhello.c
            nx_secure_dtls_server_create.c
            nx_secure_dtls_server_delete.c
            nx_secure_dtls_server_handshake.c
            nx_secure_dtls_server_local_certificate_add.c
            nx_secure_dtls_server_local_certificate_remove.c
            nx_secure_dtls_server_notify_set.c
            nx_secure_dtls_server_protocol_version_override.c
            nx_secure_dtls_server_psk_add.c
            nx_secure_dtls_server_session_send.c
            nx_secure_dtls_server_session_start.c
            nx_secure_dtls_server_start.c
            nx_secure_dtls_server_stop.c
            nx_secure_dtls_server_trusted_certificate_add.c
            nx_secure_dtls_server_trusted_certificate_remove.c
            nx_secure_dtls_server_x509_client_verify_configure.c
            nx_secure_dtls_server_x509_client_verify_disable.c
            nx_secure_dtls_session_cache.c
            nx_secure_dtls_session_client_info_get.c
            nx_secure_dtls_session_create.c
            nx_secure_dtls_session_delete.c
            nx_secure_dtls_session_end.c
            nx_secure_dtls_session_local_certificate_add.c
            nx_secure_dtls_session_local_certificate_remove.c
            nx_secure_dtls_session_receive.c
            nx_secure_dtls_session_reset.c
            nx_secure_dtls_session_send.c
            nx_secure_dtls_session_start.c
            nx_secure_dtls_session_trusted_certificate_add.c
            nx_secure_dtls_session_trusted_certificate_remove.c
            nx_secure_dtls_verify_mac.c
            nxe_secure_dtls_client_protocol_version_override.c
            nxe_secure_dtls_client_session_start.c
            nxe_secure_dtls_packet_allocate.c
            nxe_secure_dtls_psk_add.c
            nxe_secure_dtls_server_create.c
            nxe_secure_dtls_server_delete.c
            nxe_secure_dtls_server_local_certificate_add.c
            nxe_secure_dtls_server_local_certificate_remove.c
            nxe_secure_dtls_server_notify_set.c
            nxe_secure_dtls_server_protocol_version_override.c
            nxe_secure_dtls_server_psk_add.c
            nxe_secure_dtls_server_session_send.c
            nxe_secure_dtls_server_session_start.c
            nxe_secure_dtls_server_start.c
            nxe_secure_dtls_server_stop.c
            nxe_secure_dtls_server_trusted_certificate_add.c
            nxe_secure_dtls_server_trusted_certificate_remove.c
            nxe_secure_dtls_server_x509_client_verify_configure.c
            nxe_secure_dtls_server_x509_client_verify_disable.c
            nxe_secure_dtls_session_client_info_get.c
            nxe_secure_dtls_session_create.c
            nxe_secure_dtls_session_delete.c
            nxe_secure_dtls_session_end.c
            nxe_secure_dtls_session_local_certificate_add.c
            nxe_secure_dtls_session_local_certificate_remove.c
            nxe_secure_dtls_session_receive.c
            nxe_secure_dtls_session_reset.c
            nxe_secure_dtls_session_send.c
            nxe_secure_dtls_session_start.c
            nxe_secure_dtls_session_trusted_certificate_add.c
            nxe_secure_dtls_session_trusted_certificate_remove.c

        Files are modified to fix compiler errors when NX_SECURE_X509_DISABLE_CRL is defined:
            nx_secure_x509.h
            nx_secure_x509_certificate_revocation_list_parse.c
            nx_secure_x509_crl_revocation_check.c
            nx_secure_x509_crl_verify.c
            nx_secure_x509_ecc_certificate_revocation_list_parse.c
            nx_secure_x509_ecc_crl_verify.c

        Files are modified to support AES-GCM cipher:
            nx_secure_crypto_method_self_test_aes.c
            nx_secure_crypto_table_self_test.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_record_payload_encrypt.c

        Files are modified to fix swapped PSK identity and hint parameters
          when sending to the remote host:
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_server_key_exchange.c

        Files are modified to fix Session ID handling problem (session ID
          length is always 0 in the initial ServerHello):
            nx_secure_tls_send_serverhello.c

        Files are modified to update scratch buffers to support the new
          default 4096-bit RSA key size:
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_client_key_exchange.c

        Files are modified to fix issue with processing CertificateVerify
          messages in a TLS Server with Client X.509 Certificate
          verification enabled:
            nx_secure_tls_process_remote_certificate.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_remote_certificate_verify.c
            nx_secure_tls_server_handshake.c

        Files are added to support new API for allocating buffer space
          for incoming remote certificates:
            nx_secure_tls_remote_certificate_buffer_allocate.c
            nxe_secure_tls_remote_certificate_buffer_allocate.c

        Files are modified to support new API for allocating buffer space
          for incoming remote certificates:
            nx_secure_tls.h
            nx_secure_tls_api.h

        Files are added to support new API for configuring Client X.509
          authentication for TLS servers:
            nx_secure_tls_session_x509_client_verify_configure.c
            nxe_secure_tls_session_x509_client_verify_configure.c

        Files are modified to support new API for Client X.509 authentication:
            nx_secure_tls.h
            nx_secure_tls_api.h

        Files are modified to clear cryptographic secret data on errors:
            nx_secure_tls_session_receive_records.c
            nx_secure_tls_session_send.c

        Files are modified to assure that random number values are always cast
          to 32-bit type or smaller:
            nx_secure_tls_generate_premaster_secret.c

        Files are modified to assure that CBC padding values are properly checked:
            nx_secure_tls_record_payload_decrypt.c

        Files are modified to assure that MAC hash checking happens even if
          decryption padding checking fails:
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_process_record.c

        Files are modified to free all allocated remote certificates in a
          TLS server session as soon as certificate chain validation is
          complete. TLS clients need the remote certificates until after
          the key echange is complete so they are cleared later:
            nx_secure_tls_process_remote_certificate.c
            nx_secure_tls_send_client_key_exchange.c

        Files are modified to fix the usage of crypto metadata for hash method:
            nx_secure_tls_local_certificate_add.c
            nx_secure_tls_process_remote_certificate.c
            nx_secure_tls_remote_certificate_verify.c
            nx_secure_tls_session_create.c
            nx_secure_tls_trusted_certificate_add.c
            nx_secure_x509.h
            nx_secure_x509_certificate_verify.c
            nx_secure_x509_crl_verify.c

        Files are modified to support AEAD cipher:
            nx_secure_tls.h
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_record_payload_encrypt.c

        Files are modified to reset TLS session state if the TLS connection fails:
            nx_secure_tls_session_end.c
            nx_secure_tls_session_start.c

        Files are modified to return errors if cryptographic routines are
          improperly initialized:
            nx_secure_tls.h
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_process_finished.c

        Files are modified to support elliptic curve cryptography:
            nx_secure_tls.h
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_process_server_key_exchange.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_clienthello_extensions.c
            nx_secure_tls_send_server_key_exchange.c
            nx_secure_tls_send_serverhello_extensions.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_send_clienthello.c
            nx_secure_dtls_send_serverhello.c

        Files are added or modified to optimize the logic:
            nx_secure_tls_client_handshake.c
            nx_secure_tls_payload_encrypt.c
            nx_secure_tls_process_clienthello_extensions.c
            nx_secure_tls_process_record.c
            nx_secure_tls_send_certificate.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_clienthello_extensions.c
            nx_secure_tls_send_serverhello.c
            nx_secure_tls_send_serverhello_extensions.c
            nx_secure_tls_server_handshake.c
            nx_secure_tls_session_create.c
            nx_secure_x509.c
            nx_secure_x509_certificate_chain_verify.c

        Files are modified to add wait_option to _nx_secure_tls_send_certificate:
            nx_secure_dtls_client_handshake.c
            nx_secure_dtls_server_handshake.c
            nx_secure_tls.h
            nx_secure_tls_client_handshake.c
            nx_secure_tls_send_certificate.c
            nx_secure_tls_server_handshake.c

        Files are modified to fix renegotiation issue with certain browsers due to both
          SCSV and the Secure Renegotiation extension being required (should be either/or):
            nx_secure_tls.h
            nx_secure_tls_map_error_to_alert.c
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_clienthello_extensions.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_session_renegotiate.c
            nx_secure_tls_session_reset.c

        Files are modified about server state processing:
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_process_finished.c
            nx_secure_tls_server_handshake.c
            nx_secure_dtls_server_handshake.c

        Files are modified to add flexibility of using macros instead of direct C library function calls:
            nx_secure_dtls_client_handshake.c
            nx_secure_dtls_hash_record.c
            nx_secure_dtls_packet_allocate.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_process_header.c
            nx_secure_dtls_process_helloverifyrequest.c
            nx_secure_dtls_process_record.c
            nx_secure_dtls_send_clienthello.c
            nx_secure_dtls_send_helloverifyrequest.c
            nx_secure_dtls_send_record.c
            nx_secure_dtls_send_serverhello.c
            nx_secure_dtls_server_handshake.c
            nx_secure_dtls_session_cache.c
            nx_secure_dtls_session_create.c
            nx_secure_dtls_session_reset.c
            nx_secure_dtls_session_send.c
            nx_secure_dtls_verify_mac.c
            nx_secure_tls.h
            nx_secure_tls_client_handshake.c
            nx_secure_tls_client_psk_set.c
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_generate_premaster_secret.c
            nx_secure_tls_key_material_init.c
            nx_secure_tls_local_certificate_remove.c
            nx_secure_tls_packet_allocate.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_changecipherspec.c
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_process_finished.c
            nx_secure_tls_process_remote_certificate.c
            nx_secure_tls_process_serverhello.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_psk_add.c
            nx_secure_tls_psk_find.c
            nx_secure_tls_record_payload_encrypt.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_finished.c
            nx_secure_tls_send_serverhello.c
            nx_secure_tls_session_create.c
            nx_secure_tls_session_keys_set.c
            nx_secure_tls_session_reset.c
            nx_secure_tls_session_sni_extension_parse.c
            nx_secure_tls_verify_mac.c
            nx_secure_x509_certificate_initialize.c
            nx_secure_x509_certificate_revocation_list_parse.c
            nx_secure_x509_certificate_verify.c
            nx_secure_x509_crl_revocation_check.c
            nx_secure_x509_distinguished_name_compare.c
            nx_secure_x509_dns_name_initialize.c
            nx_secure_x509_oid_parse.c

        Files are modified to add extension hook:
            nx_secure_tls.h
            nx_secure_tls_generate_keys.c
            nx_secure_tls_generate_premaster_secret.c
            nx_secure_tls_process_certificate_request.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_clienthello_extensions.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_process_server_key_exchange.c
            nx_secure_tls_send_certificate_request.c
            nx_secure_x509.h
            nx_secure_x509_crl_verify.c

        Files are modified to properly initialize the crypto control block and pass crypto handled
        into crypto internal functions:
            nx_secure_tls.h
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_handshake_hash_init.c
            nx_secure_tls_handshake_hash_update.c
            nx_secure_tls_hash_record.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_process_server_key_exchange.c
            nx_secure_tls_record_hash_initialize.c
            nx_secure_tls_record_hash_update.c
            nx_secure_x509_certificate_verify.c
            nx_secure_x509_crl_verify.c

        Files are modified to clear encryption key and other secret data:
            nx_secure_dtls_send_record.c
            nx_secure_dtls_session_end.c
            nx_secure_dtls_session_receive.c
            nx_secure_dtls_session_start.c
            nx_secure_tls_client_handshake.c
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_handshake_process.c
            nx_secure_tls_hash_record.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_record.c
            nx_secure_tls_record_hash_calculate.c
            nx_secure_tls_record_payload_encrypt.c
            nx_secure_tls_send_record.c
            nx_secure_tls_session_receive.c
            nx_secure_tls_session_receive_records.c
            nx_secure_tls_session_renegotiate.c
            nx_secure_x509_crl_verify.c

        Files are added for crypto method self test:
            nx_secure_crypto_method_self_test_3des.c
            nx_secure_crypto_method_self_test_aes.c
            nx_secure_crypto_method_self_test_des.c
            nx_secure_crypto_method_self_test_hmac_md5.c
            nx_secure_crypto_method_self_test_hmac_sha.c
            nx_secure_crypto_method_self_test_md5.c
            nx_secure_crypto_method_self_test_prf.c
            nx_secure_crypto_method_self_test_rsa.c
            nx_secure_crypto_method_self_test_sha.c
            nx_secure_crypto_rng_self_test.c
            nx_secure_crypto_table_self_test.c
            nx_secure_crypto_table_self_test.h

        Other modified files:
            nx_secure_dtls_process_clienthello.c            Adjusted the function name.
            nx_secure_dtls_send_clienthello.c               Fixed endian issue.
            nx_secure_module_hash_compute.c                 Compute the hash value of module.
            nx_secure_tls_ecc_send_client_key_exchange.c    Fixed swapped PSK identity and hint parameters.
            nx_secure_tls_process_record.c                  Removed unused function parameter (internal API).
            nx_secure_tls_session_receive_records.c         Removed unused function parameter (internal API).       
            nx_secure_tls.h                                 Supported ECC ciphersuite.
                                                            Disabled AEAD by default.
            nx_secure_tls_api.h                             Modified the format slightly.
            nx_secure_tls_check_protocol_version.c          Fix compiler errors for position independence.
            nx_secure_tls_ecc_process_certificate_request.c Fix the issue with no client certificate added.
            nx_secure_tls_finished_hash_generate.c          Fixed the function pointer checking.
            nx_secure_tls_generate_keys.c                   Rearranged code sequence for static analysis.
            nx_secure_tls_generate_premaster_secret.c       Rearranged code sequence for static analysis.
            nx_secure_tls_metadata_size_calculate.c         Fixed the usage of crypto metadata for hash method.
            nx_secure_tls_newest_supported_version.c        Moved version override support to a separate API.
            nx_secure_tls_process_certificate_verify.c      Fixed compiler warnings.
            nx_secure_tls_process_client_key_exchange.c     Used random premaster for incorrect message.
                                                              Fixed endian issue.
            nx_secure_tls_process_clienthello.c             Corrected the index of compress method.
            nx_secure_tls_process_clienthello_extensions.c  Added buffer size checking.
            nx_secure_tls_process_record.c                  Modified the format slightly.
            nx_secure_tls_process_server_key_exchange.c     Fixed endian issue.
            nx_secure_tls_process_serverhello_extensions.c  Fixed compiler warnings.
            nx_secure_tls_protocol_version_get.c            Moved version override support to a separate API. 

            nx_secure_tls_record_payload_decrypt.c          Modified the format slightly.
                                                              Fixed compiler issues.
            nx_secure_tls_record_payload_encrypt.c          Added CBC mode checking for chained packet.
                                                              Fixed packet buffer overflow while padding for AES-CBC.
            nx_secure_tls_remote_certificate_buffer_allocate.c
                                                            Rearranged code sequence for static analysis.
            nx_secure_tls_send_clienthello_extensions.c     Send ClientHello extensions.
            nx_secure_tls_send_record.c                     Skipped the hash when it was not required.
            nx_secure_tls_send_server_key_exchange.c        Fixed endian issue.
            nx_secure_tls_send_serverhello_extensions.c     Send ServerHello extensions.
            nx_secure_tls_send_serverhello.c                Fixed compiler warnings.
            nx_secure_tls_session_create.c                  Fixed the usage of crypto metadata for hash method.
            nx_secure_tls_session_iv_size_get.c             Fixed IV size for TLS 1.0.
            nx_secure_tls_session_keys_set.c                Rearranged code sequence for static analysis.
            nx_secure_tls_session_reset.c                   Optimized the logic.
            nx_secure_tls_session_time_function_set.c       Set a function pointer to get the current time.
            nx_secure_tls_verify_mac.c                      Supported zero-length TLS application data records.
            nx_secure_x509.c                                Fixed issues with parsing offsets and
                                                              version check in parsing unique IDs.
            nx_secure_x509.h                                Fixed compiler warnings.
            nx_secure_x509_certificate_revocation_list_parse.c
                                                            Improved CRL parsing.
            nx_secure_x509_certificate_initialize.c         Released mutex when return.
            nx_secure_x509_oid_parse.c                      Fix compiler errors for position independence.
            nx_secure_x509_pkcs1_rsa_private_key_parse.c    Removed obsolete comment.
            nxe_secure_tls_remote_certificate_buffer_allocate.c
                                                            Rearranged code sequence for static analysis.
            nxe_secure_tls_session_create.c                 Checked duplicate creation.
            nxe_secure_tls_session_delete.c                 Verified the session before it is deleted.

       Files renamed:

               File Name in Release 5.11                             File Name in Release 5.12
            nx_secure_tls_session_timestamp_function_set.c      nx_secure_tls_session_time_function_set.c
            nxe_secure_tls_session_timestamp_function_set.c     nxe_secure_tls_session_time_function_set.c

12/15/2017  NX Secure generic code version 5.11. This release includes the
            following major features:

        Session renegotiation and the Secure Renegotiation Indication extension
            Full TLS session renegotiation is now supported, along with the
            Secure Renegotiation Indication extension which prevents certain
            Man-in-the-Middle attacks against renegotiation.

        Certificate verification callback
            Added support to allow application to perform additional checks on
            a certificate provided by a remote host during the TLS handshake utilizing
            a user-supplied callback.

        Session callbacks for TLS Client and TLS Server
            Added support to allow the application to process TLS extensions following
            the reception of a Hello message from the remote host. This allows for
            the application to respond to extensions requiring decisions such as
            the Server Name Indication (SNI) extension which allows a client to specify
            the name of the server it wishes to connect with.

        Multiple Server Certificate support
            Added new API to support adding multiple device identity certificates,
            possibly with the same Subject (Common Name, etc.) using a new unique
            numeric identifier (supplied by the application). This allows a TLS server
            to host multiple identity certificates and choose an approriate certificate
            to send to a connecting client. Used with the TLS Server session callback,
            the application can search for the appropriate certificate during the TLS
            handshake, and the numeric identifier allows for name conflicts between
            multiple server certificates used for the same device.

        Server Name Indication TLS extension
            Added support for the TLS Server Name Indication (SNI) extension. This
            extension allows a client to specify the server with which it is trying
            to connect, allowing the server to select parameters and credentials
            in the case where a single endpoint services multiple different server
            identities.

        X.509 Certificate Revocation List parsing
            Added support for X.509 CRLs. A new API (used with the certificate verification
            callback) is provided to check revocation status for certificates recieved
            during the TLS handshake.

        X.509 Key Usage and Extended Key Usage extensions support
            Added helper functions to allow an application to check the Key Usage
            and Extended Key Usage extensions in the certificate verification callback.
            The extensions allow an application to determine if a certificate supplied
            by a remote host is valid for a particular operation (e.g. identifying a
            TLS server).

        DNS verification
            Added support for checking the URL top-level domain name for a remote host
            against the certificate provided by that remote host. A new API (used
            with the certificate verification callback) is provided to compare the TLD
            name of the URL used to access a host with the Common Name and subjectAltName
            DNSName fields in the X.509 certificate provided by the remote host.

        Vendor-defined private key types
            Added support for private key types beyond the standard DER-encoded RSA
            keys. Vendor-defined private keys will be passed directly to the hardware
            driver for the appropriate cryptographic operations, with the assumption
            that all parsing, unwrapping, and processing of those keys will be handled
            by the hardware or hardware driver.

        Files are modified or added to add session callbacks:
            nx_secure_tls.h
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_session_client_callback_set.c
            nx_secure_tls_process_serverhello.c
            nx_secure_tls_session_server_callback_set.c
            nxe_secure_tls_session_client_callback_set.c
            nxe_secure_tls_session_server_callback_set.c

        Files are modified to match the certificate ID:
            nx_secure_tls_local_certificate_remove.c
            nx_secure_tls_trusted_certificate_remove.c
            nx_secure_x509.h
            nx_secure_x509_certificate_chain_verify.c
            nx_secure_x509_certificate_list_add.c
            nx_secure_x509_certificate_list_find.c
            nx_secure_x509_certificate_list_remove.c
            nx_secure_x509_local_device_certificate_get.c
            nx_secure_x509_store_certificate_find.c
            nx_secure_x509_store_certificate_add.c
            nx_secure_x509_store_certificate_remove.c

        Files are modified or added to support multiple extensions:
            nx_secure_tls.h
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_clienthello_extensions.c
            nx_secure_tls_process_serverhello.c
            nx_secure_tls_process_serverhello_extensions.c
            nx_secure_tls_session_sni_extension_parse.c
            nx_secure_tls_session_sni_extension_set.c
            nxe_secure_tls_session_sni_extension_parse.c
            nxe_secure_tls_session_sni_extension_set.c

        Files are modified or added to support DTLS:
            nxe_secure_dtls_packet_allocate.c
            nxe_secure_dtls_session_create.c
            nxe_secure_dtls_session_delete.c
            nxe_secure_dtls_session_end.c
            nxe_secure_dtls_session_receive.c
            nxe_secure_dtls_session_reset.c
            nxe_secure_dtls_session_send.c
            nxe_secure_dtls_session_start.c
            nx_secure_dtls_allocate_handshake_packet.c
            nx_secure_dtls_api.h
            nx_secure_dtls_client_handshake.c
            nx_secure_dtls.h
            nx_secure_dtls_hash_record.c
            nx_secure_dtls_packet_allocate.c
            nx_secure_dtls_process_clienthello.c
            nx_secure_dtls_process_handshake_header.c
            nx_secure_dtls_process_header.c
            nx_secure_dtls_process_helloverifyrequest.c
            nx_secure_dtls_process_record.c
            nx_secure_dtls_retransmit.c
            nx_secure_dtls_retransmit_queue_flush.c
            nx_secure_dtls_send_clienthello.c
            nx_secure_dtls_send_handshake_record.c
            nx_secure_dtls_send_helloverifyrequest.c
            nx_secure_dtls_send_record.c
            nx_secure_dtls_send_serverhello.c
            nx_secure_dtls_server_handshake.c
            nx_secure_dtls_session_cache.c
            nx_secure_dtls_session_create.c
            nx_secure_dtls_session_delete.c
            nx_secure_dtls_session_end.c
            nx_secure_dtls_session_receive.c
            nx_secure_dtls_session_reset.c
            nx_secure_dtls_session_send.c
            nx_secure_dtls_session_start.c
            nx_secure_dtls_verify_mac.c
            nx_secure_tls_check_protocol_version.c
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_handshake_hash_update.c
            nx_secure_tls_newest_supported_version.c
            nx_secure_tls_process_certificate_request.c
            nx_secure_tls_send_certificate_verify.c

        Files are modified or added to optimize the logic:
            nx_secure_tls_client_handshake.c
            nx_secure_tls_ciphersuite_lookup.c
            nx_secure_tls_finished_hash_generate.c
            nx_secure_tls_generate_keys.c
            nx_secure_tls_handshake_process.c
            nx_secure_tls_key_material_init.c
            nx_secure_tls_process_certificate_request.c
            nx_secure_tls_process_certificate_verify.c
            nx_secure_tls_process_changecipherspec.c
            nx_secure_tls_process_header.c
            nx_secure_tls_process_remote_certificate.c
            nx_secure_tls_send_alert.c
            nx_secure_tls_send_certificate.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_changecipherspec.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_record.c
            nx_secure_tls_send_server_key_exchange.c
            nx_secure_tls_send_serverhello.c
            nx_secure_tls_server_handshake.c
            nx_secure_tls_session_create.c
            nx_secure_tls_session_iv_size_get.c
            nx_secure_tls_session_keys_set.c
            nx_secure_tls_session_start.c
            nx_secure_tls_verify_mac.c
            nx_secure_x509_certificate_list_find.c
            nx_secure_x509_remote_endpoint_certificate_get.c
            nx_secure_x509_store_certificate_add.c
            nxe_secure_tls_packet_allocate.c
            nxe_secure_tls_session_create.c

        Files are modified or added to support renegotiation:
            nx_secure_tls.h
            nx_secure_tls_client_handshake.c
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_process_finished.c
            nx_secure_tls_send_clienthello.c
            nx_secure_tls_send_finished.c
            nx_secure_tls_send_hellorequest.c
            nx_secure_tls_send_serverhello.c
            nx_secure_tls_session_receive.c
            nx_secure_tls_session_receive_records.c
            nx_secure_tls_session_renegotiate.c
            nx_secure_tls_session_renegotiation_callback_set.c
            nx_secure_tls_session_reset.c
            nxe_secure_tls_session_renegotiate.c
            nxe_secure_tls_session_renegotiation_callback_set.c

        Files are modified to support more ciphersuites:
            nx_secure_tls.h
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_record_payload_encrypt.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_clienthello.c

        Files are modified to support ECJPAKE for DTLS:
            nx_secure_tls.h
            nx_secure_tls_generate_keys.c
            nx_secure_tls_generate_premaster_secret.c
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_process_server_key_exchange.c
            nx_secure_tls_psk_add.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_tls_send_server_key_exchange.c
            nxe_secure_tls_psk_add.c

        Files are modified to fix compiler warnings:
            nx_secure_tls_process_clienthello.c
            nx_secure_tls_record_payload_decrypt.c
            nx_secure_tls_remote_certificate_verify.c
            nx_secure_tls_send_certificate.c
            nx_secure_tls_session_end.c
            nx_secure_x509.c
            nx_secure_x509_certificate_chain_verify.c
            nx_secure_x509_certificate_list_add.c
            nx_secure_x509_certificate_list_find.c
            nx_secure_x509_certificate_list_remove.c
            nx_secure_x509_certificate_verify.c
            nx_secure_x509_remote_endpoint_certificate_get.c

        Files are modified to support TLS protocol version override:
            nx_secure_tls_check_protocol_version.c
            nx_secure_tls_newest_supported_version.c
            nx_secure_tls_session_reset.c

        Files are modified to support context specific ASN.1 tags:
            nx_secure_x509_asn1_tlv_block_parse.c
            nx_secure_x509_pkcs1_rsa_private_key_parse.c
            nx_secure_x509_pkcs7_decode.c

        Files are added to hash record:
            nx_secure_tls_record_hash_calculate.c
            nx_secure_tls_record_hash_initialize.c
            nx_secure_tls_record_hash_update.c

        Files are added to free remote certificate:
            nx_secure_tls_remote_certificate_free.c
            nx_secure_tls_remote_certificate_free_all.c
            nxe_secure_tls_remote_certificate_free_all.c

        Files are added to support vendor-defined private key type:
            nx_secure_tls_process_client_key_exchange.c
            nx_secure_tls_send_certificate_verify.c
            nx_secure_tls_send_client_key_exchange.c
            nx_secure_x509.c
            nx_secure_x509_certificate_initialize.c
            nx_secure_x509_certificate_verify.c
            nx_secure_x509_pkcs1_rsa_private_key_parse.c
            nxe_secure_x509_certificate_initialize.c

        Files are added to support empty certificate messages:
            nx_secure_tls_send_certificate.c
            nx_secure_tls_send_certificate_verify.c

        Files are added for server certificate API:
            nx_secure_tls_server_certificate_add.c
            nx_secure_tls_server_certificate_find.c
            nx_secure_tls_server_certificate_remove.c
            nxe_secure_tls_server_certificate_add.c
            nxe_secure_tls_server_certificate_find.c
            nxe_secure_tls_server_certificate_remove.c

        Files are modified to add compare bit fields:
            nx_secure_tls_send_certificate.c
            nx_secure_x509.h
            nx_secure_x509_certificate_chain_verify.c
            nx_secure_x509_certificate_list_remove.c
            nx_secure_x509_distinguished_name_compare.c
            nx_secure_x509_remote_endpoint_certificate_get.c

        Other modified files:
            nx_secure_tls.h                                 Supported to configure symbols for PSK buffers.
                                                            Sorted the functions by alphabet order.
            nx_secure_tls_api.h                             Sorted the API by alphabet order.
            nx_secure_tls_check_protocol_version.c          Supported TLS protocol version override.
            nx_secure_tls_client_handshake.c                Handled the return values.
                                                            Fixed packet leak issue.
            nx_secure_tls_initialize.c                      Fixed the function name.
            nx_secure_port.h                                Fixed a typo.
            nx_secure_tls_generate_keys.c                   Added additional check for missing PRF.
            nx_secure_tls_map_error_to_alert.c              Updated mapping for certificate
                                                              verification failure.
            nx_secure_tls_process_client_key_exchange.c     Updated to new crypto API.
            nx_secure_tls_process_record.c                  Fixed record length check.
            nx_secure_tls_psk_find.c                        Returned the first associated PSK when
                                                              no hint is received.
            nx_secure_tls_record_payload_encrypt.c          Supported data in packet chain.
            nx_secure_tls_remote_certificate_verify.c       Added expiration data check.
            nx_secure_tls_send_certificate.c                Released mutex before block operation.
            nx_secure_tls_send_clienthello.c                Supported extensions.
            nx_secure_tls_send_handshake_record.c           Released packet on error.
            nx_secure_tls_send_record.c                     Let the caller release packet when TCP send failed.
            nx_secure_tls_send_serverhello.c                Supported extensions.
            nx_secure_tls_server_handshake.c                Added support for server-side client
                                                              certificate verification.
                                                            Released packet on send failed.
            nx_secure_tls_session_end.c                     Improved TLS session shutdown.
                                                            Released packet on send failed.
            nx_secure_tls_session_reset.c                   Cleaned up existing certificate.
            nx_secure_x509.c                                Added support for extension parsing.
            nx_secure_x509.h                                Added support for extension parsing and fixed typos for API names.
            nx_secure_x509_certificate_list_add.c           Fixed the logic to add certificate with duplicate ID.
            nx_secure_x509_distinguished_name_compare.c     Supported empty name comparison.
                                                            Improved the distinguished name comparison logic.
            nx_secure_x509_find_certificate_methods.c       Updated API to take an ID for the
                                                              algorithm desired.
            nx_secure_x509_local_device_certificate_get.c   Used pre-defined symbols instead of
                                                              hardcoded values.
            nx_secure_x509_pkcs7_decode.c                   Fixed signature length check.

        Other added files:
            nx_secure_tls_active_certificate_set.c          Set the active local certificate.
            nx_secure_tls_local_certificate_find.c          New API to find certificates by Common Name.
            nx_secure_tls_send_certificate_request.c        Populated an NX_PACKET with a CertificateRequest message.
            nx_secure_tls_session_certificate_callback_set.c
                                                            Set up a function pointer that TLS will
                                                              invoke when a certificate is received.
            nx_secure_tls_session_client_verify_disable.c   Disabled client certificate verification.
            nx_secure_tls_session_client_verify_enable.c    Enabled client certificate verification.
            nx_secure_tls_session_protocol_version_override.c
                                                            Overrided the TLS protocol version.
            nx_secure_x509_certificate_revocation_list_parse.c
                                                            Supported revocation list parse.
            nx_secure_x509_common_name_dns_check.c          Checked a certificate's Common Name
                                                              against a Top Level Domain name (TLD).
            nx_secure_x509_crl_revocation_check.c           Supported revocation check.
            nx_secure_x509_crl_verify.c                     Verified CRL.
            nx_secure_x509_distinguished_name_parse.c       Parsed a DER-encoded X.509 Distinguished Name.
            nx_secure_x509_dns_name_initialize.c            Initialized an X.509 DNS name.
            nx_secure_x509_expiration_check.c               Checked a certificate's validity period.
            nx_secure_x509_extended_key_usage_extension_parse.c
                                                            Parse through an X.509 certificate for
                                                              an Extended KeyUsage extension.
            nx_secure_x509_extension_find.c                 Added support for X.509 extension parsing.
            nx_secure_x509_key_usage_extension_parse.c      Parse through an X.509 certificate for
                                                              a KeyUsage extension.
            nx_secure_x509_local_certificate_find.c         Searched a given certificate store.
            nx_secure_x509_oid_parse.c                      Parsed a DER-encoded Object Identifier string.
            nx_secure_x509_subject_alt_names_find.c         Searched X.509 subjectAltName.
            nx_secure_x509_wildcard_compare.c               Compared wildcard names.
            nxe_secure_tls_active_certificate_set.c         Set the active local certificate.
            nxe_secure_tls_local_certificate_find.c         New API to find local certificate by Common Name.
            nxe_secure_tls_session_certificate_callback_set.c
                                                            Set up a function pointer that TLS will
                                                              invoke when a certificate is received.
            nxe_secure_tls_session_client_verify_disable.c  Disabled client certificate verification.
            nxe_secure_tls_session_client_verify_enable.c   Enabled client certificate verification.
            nxe_secure_tls_session_protocol_version_override.c
                                                            Overrided the TLS protocol version.
            nxe_secure_x509_common_name_dns_check.c         Checked a certificate's Common Name
                                                              against a Top Level Domain name (TLD).
            nxe_secure_x509_crl_revocation_check.c          Supported revocation check.
            nxe_secure_x509_dns_name_initialize.c           Initialized an X.509 DNS name.
            nxe_secure_x509_extension_find.c                Added support for X.509 extension parsing.
            nxe_secure_x509_extended_key_usage_extension_parse.c
                                                            Parse through an X.509 certificate for
                                                              an Extended KeyUsage extension.
            nxe_secure_x509_key_usage_extension_parse.c     Parse through an X.509 certificate for
                                                              a KeyUsage extension.

        Files renamed:

               File Name in Release 5.10                             File Name in Release 5.11
            nx_secure_tls_process_server_certificate.c      nx_secure_tls_process_remote_certificate.c

06/09/2017  Initial NX Secure generic code version 5.10.


3. NetXDuo Secure Crypto

08/15/2019  NX Secure generic code version 5.12. This release includes the
            following major features:

        Files are modified to provide consistent error checking of return
        values from generic NX_CRYPTO cipher routine APIs:
            nx_crypto_const.h
            nx_crypto_drbg.c
            nx_crypto_ecjpake.c
            nx_crypto_ecjpake.h
            nx_crypto_phash.c
            nx_crypto_pkcs1_v1.5.c

        Files are modified to improve error checking:
            nx_crypto_ec.c
            nx_crypto_ec.h
            nx_crypto_ecdh.c
            nx_crypto_ecdsa.c
            nx_crypto_ecjpake.c

        Files are modified to fix the compiler warnings for cast-function-type:
            nx_crypto_3des.c
            nx_crypto_des.c
            nx_crypto_des.h
            nx_crypto_md5.c
            nx_crypto_md5.h
            nx_crypto_sha1.c
            nx_crypto_sha1.h

        Files are modified to address issues raised by static anaylsis tools:
            nx_crypto_aes.c
            nx_crypto_cbc.c
            nx_crypto_drbg.c
            nx_crypto_ec.c
            nx_crypto_ecjpake.c
            nx_crypto_huge_number.c
            nx_crypto_phash.c
            nx_crypto_sha5.c

        Files are modified to add an "extern 'C'" wrapper for C++ compilers:
            nx_crypto.h
            nx_crypto_3des.h
            nx_crypto_const.h
            nx_crypto_des.h
            nx_crypto_ecdsa.h
            nx_crypto_hkdf.h
            nx_crypto_hmac_md5.h
            nx_crypto_hmac_sha1.h
            nx_crypto_hmac_sha2.h
            nx_crypto_hmac_sha5.h
            nx_crypto_md5.h
            nx_crypto_phash.h
            nx_crypto_pkcs1_v1.5.h
            nx_crypto_sha1.h
            nx_crypto_sha2.h
            nx_crypto_sha5.h
            nx_crypto_tls_prf_1.h
            nx_crypto_tls_prf_sha256.h
            nx_crypto_tls_prf_sha384.h
            nx_crypto_tls_prf_sha512.h

        Files are modified to avoid unaligned memory access:
            nx_crypto_aes.c
            nx_crypto_ccm.c
            nx_crypto_ctr.c
            nx_crypto_drbg.c
            nx_crypto_xcbc_mac.c

        Files are modified or added to be FIPS 140-2 compliant:
            nx_crypto.h
            nx_crypto_3des.c
            nx_crypto_3des.h
            nx_crypto_aes.c
            nx_crypto_cbc.c
            nx_crypto_cbc.h
            nx_crypto_ccm.c
            nx_crypto_ccm.h
            nx_crypto_const.h
            nx_crypto_ctr.c
            nx_crypto_ctr.h
            nx_crypto_des.c
            nx_crypto_des.h
            nx_crypto_dh.c
            nx_crypto_dh.h
            nx_crypto_ec.c
            nx_crypto_ec.h
            nx_crypto_ecjpake.c
            nx_crypto_ecjpake.h
            nx_crypto_generic_ciphersuites.c
            nx_crypto_hmac.c
            nx_crypto_hmac.h
            nx_crypto_hmac_md5.c
            nx_crypto_hmac_md5.h
            nx_crypto_hmac_sha1.c
            nx_crypto_hmac_sha1.h
            nx_crypto_hmac_sha2.c
            nx_crypto_hmac_sha2.h
            nx_crypto_hmac_sha5.c
            nx_crypto_hmac_sha5.h
            nx_crypto_huge_number.c
            nx_crypto_huge_number.h
            nx_crypto_huge_number_extended.c
            nx_crypto_initialize.c
            nx_crypto_md5.c
            nx_crypto_md5.h
            nx_crypto_method_self_test.c
            nx_crypto_method_self_test.h
            nx_crypto_method_self_test_3des.c
            nx_crypto_method_self_test_aes.c
            nx_crypto_method_self_test_des.c
            nx_crypto_method_self_test_drbg.c
            nx_crypto_method_self_test_ecdh.c
            nx_crypto_method_self_test_ecdsa.c
            nx_crypto_method_self_test_hmac_md5.c
            nx_crypto_method_self_test_hmac_sha.c
            nx_crypto_method_self_test_md5.c
            nx_crypto_method_self_test_pkcs1.c
            nx_crypto_method_self_test_prf.c
            nx_crypto_method_self_test_rsa.c
            nx_crypto_method_self_test_sha.c
            nx_crypto_module_start.c
            nx_crypto_null.h
            nx_crypto_null_cipher.c
            nx_crypto_phash.c
            nx_crypto_phash.h
            nx_crypto_pkcs1_v1.5.c
            nx_crypto_pkcs1_v1.5.h
            nx_crypto_rsa.c
            nx_crypto_sha1.c
            nx_crypto_sha1.h
            nx_crypto_sha2.c
            nx_crypto_sha2.h
            nx_crypto_sha5.c
            nx_crypto_sha5.h
            nx_crypto_tls_prf_1.c
            nx_crypto_tls_prf_1.h
            nx_crypto_tls_prf_sha256.c
            nx_crypto_tls_prf_sha256.h
            nx_crypto_xcbc_mac.c
            nx_crypto_xcbc_mac.h

        Files are modified to add operation method for elliptic curve cryptography:
            nx_crypto.h
            nx_crypto_const.h
            nx_crypto_ec.c
            nx_crypto_ec.h
            nx_crypto_ecjpake.c
            nx_crypto_ecjpake.h
            nx_crypto_generic_ciphersuites.c

        Other modified files:
            nx_crypto.h                                     Avoided unexpected optimization on memset.
            nx_crypto_aes.h                                 Split operation functions for different modes.
            nx_crypto_aes.c                                 Split operation functions for different modes.
            nx_crypto_const.h                               Set algorithm IDs to unique values.
            nx_crypto_dh.c                                  Fixed key length check.
            nx_crypto_ecjpake.c                             Generated key pair using extra bits.
            nx_crypto_generic_ciphersuites.c                Split crypto methods to nx_crypto_methods.c, 
                                                              remove CCM ciphersuites when AEAD was disabled.
            nx_crypto_huge_number.c                         Optimized the logic.
            nx_crypto_method_self_test_drbg.c               Added return value checking of nx_crypto_init.
            nx_crypto_rsa.h                                 Modified to support RSA 4096 bits by default.
            nx_crypto_generic_ciphersuites.c                Removed CCM ciphersuites when AEAD was disabled.

        Other added files:
            nx_crypto_drbg.c                                Supported DRBG.
            nx_crypto_drbg.h                                Supported DRBG.
            nx_crypto_ecdh.c                                Supported ECDH.
            nx_crypto_ecdh.h                                Supported ECDH.
            nx_crypto_ecdsa.c                               Supported ECDSA.
            nx_crypto_ecdsa.h                               Supported ECDSA.
            nx_crypto_methods.c                             Split from nx_crypto_generic_ciphersuites.c
            nx_crypto_tls_prf_sha384.c                      Supported PRF SHA384
            nx_crypto_tls_prf_sha384.h                      Supported PRF SHA384
            nx_crypto_tls_prf_sha512.c                      Supported PRF SHA512
            nx_crypto_tls_prf_sha512.h                      Supported PRF SHA512

12/15/2017  Initial Crypto generic code version 5.11.


4. NetXDuo Addons

Release 5.12  08-15-2019

            demo_netx_auto_ip.c                             Improved string length verification.
            nx_auto_ip.c                                    Modified comments.
            nx_auto_ip.h                                    Modified comments.
            
            bsd_demo_raw.c                                  Improved string length verification.
            bsd_demo_tcp.c                                  Improved string length verification.
            bsd_demo_udp.c                                  Improved string length verification.
            nxd_bsd.h                                       Supported BSD raw socket.
                                                            Added C++ extern wrapper.
            nxd_bsd.c                                       Supported BSD raw socket.
                                                            Added mutex protection.
                                                            Fixed BSD time calculation.
                                                            Improved packet length verification.
                                                            Modified API functions:
                                                              connect - Initialized the local interface after bind.
                                                              getaddrinfo - Fixed NULL pointer access.
                                                              inet_pton - Corrected dst buffer check.
                                                                           
            nxd_dhcp_client.c                               Improved string length verification.
                                                            Improved packet length verification.
                                                            Corrected the logic for checking DHCP message.
                                                            Fixed the outgoing interface.
                                                              Function is modified:
                                                              _nx_dhcp_client_send_with_zero_source_address()
                                                            Added check for invalid address.
            nxd_dhcp_server.c                               Improved string length verification.
                                                            Corrected the interface for sending response in _nx_dhcp_respond_to_client_message().
            demo_netxduo_dhcpv6.c                           Improved string length verification.
            nxd_dhcpv6_client.c                             Improved string length verification.
                                                            Validated the available payload in _nx_dhcpv6_send_request().
                                                            Improved packet length verification.
            nxd_dhcpv6_client.h                             Improved string length verification.
            nxd_dhcpv6_server.c                             Added new APIs to improve buffer/string length verification.
                                                            Validated the DUID private length in _nx_dhcpv6_add_client_record().
                                                            Improved packet length verification.
            nxd_dhcpv6_server.h                             Added new APIs to improve buffer/string length verification.
            
            nxd_dns.h                                       Improved internal logic.
            nxd_dns.c                                       Improved packet payload verification in _nx_dns_packet_pool_set().
                                                            Improved string length verification.
                                                              Functions are modified:
                                                              _nx_dns_cache_delete_string()
                                                              _nx_dns_cache_find_answer()
                                                              _nx_dns_host_by_address_get_internal()
                                                              _nx_dns_process_a_type()
                                                              _nx_dns_process_aaaa_type()
                                                              _nx_dns_process_cname_type()
                                                              _nx_dns_process_mx_type()
                                                              _nx_dns_process_ns_type()
                                                              _nx_dns_process_soa_type()
                                                              _nx_dns_process_srv_type()
                                                              _nx_dns_process_txt_type()
                                                              _nx_dns_question_add()
                                                              _nx_dns_send_query_by_address()
                                                            Improved internal logic.
                                                              Functions are modified:
                                                              _nx_dns_send_query_by_address()
                                                              _nx_dns_send_query_get_rdata_by_name()
                                                              _nx_dns_name_string_unencode()
                                                              _nxde_dns_host_by_name_get()
                                                            Fixed compiler warnings in _nx_dns_process_txt_type().
                                                            
         demo_netxduo_ftp.c                                 Improved string length verification.
         demo_netxduo_ftp_client_pasv.c                     Improved string length verification.
         nxd_ftp_client.c                                   Improved internal logic.
                                                            Improved string length verification.
                                                            Improved buffer length verification.
         nxd_ftp_client.h                                   Removed FileX dependency.
                                                            Improved string length verification.
         nxd_ftp_server.c                                   Fixed a bug when there were more than one connection.
                                                            Fixed socket state check on receiving RST packet.
                                                            Improved string length verification.
                                                            Improved buffer length verification.     
                                                            
        nxd_http_client.h                                   Included necessary headers.
                                                            Improved string length verification.
        nxd_http_server.h                                   Included necessary headers.
                                                            Improved string length verification.
        nxd_http_client.c                                   Added check of null pointer for username and password.
                                                            Improved packet length verification.
                                                            Improved string length verification.
        nxd_http_server.c                                   Fixed buffer size for DELETE method in _nx_http_server_digest_authenticate().
                                                            Fixed compiler warnings in _nx_http_server_hex_ascii_convert().
                                                            Improved logic to avoid timing attack in _nx_http_server_digest_authenticate()
                                                             and _nx_http_server_basic_authenticate().
                                                            Improved string length verification.
                                                            Created function nx_http_server_type_retrieve() as 
                                                             an alternative to nx_http_server_type_get().
                                                            Added digest authentication callback support.
                                                            Improved packet length verification.  
                                                            
        demo_netx_duo_mdns.c                                Added simultaneous interface support.
        nxd_mdns.c                                          Added local resource records as known answer.
                                                              Functions are modified:
                                                              _nx_mdns_data_send()
                                                              _nx_mdns_known_answer_find()
                                                            Initialized is_present to fix the bug for processing service change notify.
                                                              Functions is modified:
                                                              _nx_mdns_cache_add_resource_record()
                                                            Corrected the cache pointer.
                                                              Functions is modified:
                                                              _nx_mdns_service_lookup()
                                                            Added simultaneous interface support.
                                                              Functions are modified or added or deleted:
                                                              _nx_mdns_additional_a_aaaa_find()
                                                              _nx_mdns_additional_resource_record_find()
                                                              _nx_mdns_address_change_process()
                                                              _nx_mdns_announcing_send()
                                                              _nx_mdns_cache_add_resource_record()
                                                              _nx_mdns_cache_find_resource_record()
                                                              _nx_mdns_continuous_query()
                                                              _nx_mdns_create()
                                                              _nx_mdns_data_send()
                                                              _nx_mdns_disable()
                                                              _nx_mdns_enable()
                                                              _nx_mdns_host_address_get()
                                                              _nx_mdns_host_name_register()
                                                              _nx_mdns_known_answer_find()
                                                              _nx_mdns_one_shot_query()
                                                              _nx_mdns_packet_process()
                                                              _nx_mdns_packet_rr_process()
                                                              _nx_mdns_packet_rr_set()
                                                              _nx_mdns_packet_send()
                                                              _nx_mdns_probing_send()
                                                              _nx_mdns_query_check()
                                                              _nx_mdns_query_send()
                                                              _nx_mdns_response_send()
                                                              _nx_mdns_rr_a_aaaa_add()
                                                              _nx_mdns_rr_nsec_add()
                                                              _nx_mdns_rr_parameter_set()
                                                              _nx_mdns_rr_ptr_add()
                                                              _nx_mdns_rr_txt_add()
                                                              _nx_mdns_service_add()
                                                              _nx_mdns_service_addition_info_get()
                                                              _nx_mdns_service_change_notify_process()
                                                              _nx_mdns_service_continuous_query()
                                                              _nx_mdns_service_delete()
                                                              _nx_mdns_service_interface_delete()
                                                              _nx_mdns_service_lookup()
                                                              _nx_mdns_service_one_shot_query()
                                                              _nx_mdns_service_query_stop()
                                                              _nx_mdns_timer_event_process()
                                                              _nx_mdns_thread_entry()
                                                              _nxe_mdns_service_add()
                                                            Fixed compiler warnings in _nx_mdns_ipv6_address_change_notify().
                                                            Fixed ipv6 address string.
                                                              Functions are modified:
                                                              _nx_mdns_cache_delete_rr_string()
                                                              _nx_mdns_cache_find_resource_record()
                                                              _nx_mdns_packet_rr_data_set()
                                                              _nx_mdns_rr_a_aaaa_add()
                                                            Improve string length verification.
                                                              Functions are modified:
                                                              _nx_mdns_create()
                                                              _nx_mdns_disable()
                                                              _nxe_mdns_create()
                                                              _nxe_mdns_domain_name_set()
                                                              _nxe_mdns_service_add()
                                                              _nx_mdns_service_add()
                                                              _nxe_mdns_service_delete()
                                                              _nx_mdns_service_interface_delete()
                                                              _nxe_mdns_service_one_shot_query()
                                                              _nx_mdns_service_one_shot_query()
                                                              _nx_mdns_one_shot_query()
                                                              _nxe_mdns_service_continuous_query()
                                                              _nx_mdns_continuous_query()
                                                              _nxe_mdns_service_query_stop()
                                                              _nx_mdns_service_query_stop()
                                                              _nxe_mdns_service_lookup()
                                                              _nx_mdns_service_lookup()
                                                              _nxe_mdns_host_address_get()
                                                              _nx_mdns_host_address_get()
                                                              _nx_mdns_rr_ptr_add()
                                                              _nx_mdns_rr_srv_add()
                                                              _nx_mdns_rr_txt_add()
                                                              _nx_mdns_rr_nsec_add()
                                                              _nx_mdns_rr_parameter_set()
                                                              _nx_mdns_service_name_resolve()
                                                              _nx_mdns_service_name_assemble()
                                                              _nx_mdns_host_name_register()
                                                              _nx_mdns_timer_event_process()
                                                              _nx_mdns_probing_send()
                                                              _nx_mdns_packet_rr_add()
                                                              _nx_mdns_packet_rr_set()
                                                              _nx_mdns_packet_rr_process()
                                                              _nx_mdns_packet_rr_data_set()
                                                              _nx_mdns_conflict_process()
                                                              _nx_mdns_service_change_notify_process()
                                                              _nx_mdns_service_addition_info_get()
                                                              _nx_mdns_cache_add_resource_record()
                                                              _nx_mdns_cache_delete_string()
                                                              _nx_mdns_known_answer_find()
                                                              _nx_mdns_query_check()
                                                              _nx_mdns_service_mask_match()
                                                            Improve packet length verification.
                                                              Functions are modified:
                                                              _nx_mdns_packet_create()
                                                              _nx_mdns_packet_process()
            nxd_mdns.h                                      Added simultaneous interface support.
                                                            Fixed ipv6 address string.
                                                            Improve string length verification.     

            nxd_mqtt_client.c                               Corrected the mutex processing for receiving MQTT CONNACK.
                                                            Added packet receive notify.
                                                            Checked return status of TLS setup in _nxd_mqtt_client_secure_connect().
                                                            Deleted TLS session when disconnecting MQTT in _nxd_mqtt_process_disconnect().
                                                            Deleted TLS session when MQTT connect failed.
                                                            Improved internal logic.
                                                            Corrected timeout for TLS session.
                                                            Improved packet length verification.
            nxd_mqtt_client.h                               Added packet receive notify.
                                                            Changed the return type of tls_setup to UINT. 

            demo_netx_nat.c                                 Improved string length verification.   

            nxd_pop3_client.c                               Improved packet length verification.
                                                            Improved internal logic.
                                                            Improved string length verification.
            nxd_pop3_client.h                               Improved string length verification. 

            demo_netx_ppp.c                                 Improved string length verification.
                                                            Improved the logic.
         

            nx_ppp.c                                        Improved buffer length verification.
                                                            Functions are modified or added:
                                                              _nx_ppp_ipcp_configure_check()
                                                              _nx_ppp_lcp_configuration_retrieve()
                                                            Improved packet length verification.
                                                              Functions are modified or added:
                                                              _nx_ppp_chap_challenge_respond()
                                                              _nx_ppp_chap_challenge_send()
                                                              _nx_ppp_create()
                                                              _nx_ppp_ipcp_configure_check()
                                                              _nx_ppp_lcp_code_reject()
                                                              _nx_ppp_lcp_configuration_retrieve()
                                                              _nx_ppp_lcp_configure_reply_send()
                                                              _nx_ppp_pap_authentication_request()
                                                              _nx_ppp_ping_request()
                                                              _nx_ppp_receive_packet_process()
                                                            Improved internal logic.
                                                              Function is modified:
                                                              _nx_ppp_receive_packet_get()
                                                            Fixed the bug for chained packet.
                                                              Function is modified:
                                                              _nx_ppp_netx_packet_transfer()
                                                            Improved string length verification.
                                                              Functions are modified:
                                                              _nx_ppp_pap_authentication_request()
                                                              _nx_ppp_pap_login_valid()
                                                              _nx_ppp_chap_challenge_send()
                                                              _nx_ppp_chap_challenge_respond()
                                                              _nx_ppp_chap_challenge_validate()
                                                              _nx_ppp_pap_login_valid()
            nx_ppp.h                                           Improved string length verification.
                                                            Improved packet length verification.   

            nx_pppoe_client.c                               Improved string length verification.
                                                            Corrected the function name.
                                                            Improved internal logic.
                                                            Improved buffer length verification.
                                                            Fixed system state check.
            nx_pppoe_client.h                               Improved internal logic.
                                                            Improved string length verification.
            nx_pppoe_server.c                               Improved string length verification.
                                                            Improved buffer length verification.

            nxd_smtp_client.h                               Improved string length verification.
            nxd_smtp_client.c                               Improved string length verification.
                                                            Improved buffer length verification.   

            nxd_snmp.h                                      Improved string length verification.

            nxd_snmp.c                                      Improved buffer length verification.
                                                            Improved string length verification.
                                                            Fixed a compiler warning.
                                                            Modified nx_snmp_version_3_process to check for string size before writing PDU Engine name.     

            demo_netxduo_sntp_client.c                      Fixed compiler warnings.
            nxd_sntp_client.c                               Improved packet length verification.
                                                            Corrected the length of memset.
                                                            Adjusted local time before updating SNTP server time.
                                                            Kept microseconds precision while adding milliseconds.
            nxd_sntp_client.h                               Adjusted local time before updating SNTP server time.    

            nxd_telnet_server.c                             Improved packet length verification.
                                                            Fixed socket state check on receiving RST packet.
                                                            Fixed a bug when there were more than one connection.      

            demo_netxduo_tftp.c                             Improved string length verification.
            nxd_tftp_client.c                               Improved string length verification.
                                                            Improved packet length verification.
            nxd_tftp_server.c                               Improved string length verificaiton.
                                                            Improved packet length verification.   

            demo_netxduo_https.c                            Improved string length verification.
            nx_web_http_common.h                            Improved string length verification.
            nx_web_http_client.c                            Deleted TLS session in _nx_web_http_client_error_exit().
                                                            Cleared request packet.
                                                            Functions are modified:
                                                              _nx_web_http_client_delete()
                                                              _nx_web_http_client_request_initialize()
                                                              _nx_web_http_client_cleanup()
                                                            Added check of client state in _nx_web_http_client_response_body_get().
                                                            Checked if request packet was allocated.
                                                            Functions are modified:
                                                              _nx_web_http_client_request_header_add()
                                                              _nxe_web_http_client_request_send()
                                                              _nx_web_http_client_request_send()
                                                            Improved packet length verification.
                                                            Fixed the issue of reconnection.
                                                            Improved string length verification.
                                                            Fixed the bug of packet release.
            nx_web_http_client.h                            Included necessary headers.
                                                            Improved string length verification.
            nx_web_http_server.c                            Check content length in _nxe_web_http_server_packet_content_find().
                                                            Fixed buffer size for DELETE method in _nx_web_http_server_digest_authenticate().
                                                            Improved logic to avoid timing attack in _nx_web_http_server_digest_authenticate()
                                                              and _nx_web_http_server_basic_authenticate().
                                                            Added digest authentication callback support.
                                                            Improved packet length verification.
                                                            Fixed return value when suffix was not found.
                                                            Improved string length verification.
                                                            Created function nx_web_http_server_type_retrieve() as 
                                                              an alternative to nx_web_http_server_type_get().
            nx_web_http_server.h                            Included necessary headers.
                                                            Added digest authentication callback support.
                                                            Improved string length verification.
            nx_tcpserver.c                                  Fixed socket state check on receiving RST packet.
                                                            Fixed session reuse issue in _nx_tcpserver_data_process().                                                            
                                                            

Release 5.11  07-15-2018

            nx_auto_ip.c                                    Modified comments.
            nx_auto_ip.h                                    Modified comments.
            
            bsd_demo_raw.c                                  Supported for disabling IPv4 feature.
            bsd_demo_tcp.c                                  Supported for disabling IPv4 feature.
            bsd_demo_udp.c                                  Supported for disabling IPv4 feature.
            nxd_bsd.c                                       Improved internal logic.
                                                            Modified API functions:
                                                              getaddrinfo - Fixed a bug that AF_INET info was returned even ai_family was set to AF_INET6.
                                                              inet_pton - Fixed compiler warnings.
                                                                          Fixed endian issue for IPv6 address when ntohl is not defined.
                                                              nx_bsd_socket_set_inherited_settings - Removed NX_BSD_INHERIT_LISTENER_SOCKET_SETTINGS.
                                                              nx_bsd_raw_packet_info_extract - Used interface index since nx_interface_ip_instance 
                                                                                               is removed from interface structure.
                                                            Removed NetX trace event.
                                                            Supported for disabling IPv4 feature.
                                                            Modified internal functions:
                                                              nx_bsd_udp_receive_notify - used API to receive UDP packet to verify checksum.
                                                              nx_bsd_udp_packet_received - used API to receive UDP packet to verify checksum.
                                                              _nxd_bsd_ipv6_packet_send - Checked interface for router lookup.
                                                            Moved destination and ND cache tables to IP structure.
            nxd_bsd.h                                         Removed NX_BSD_INHERIT_LISTENER_SOCKET_SETTINGS which is now enabled, not optional
                                                              and NX_BSD_TIMED_WAIT_TIMEOUT - no longer in use.
                                                            Used time_t from time.h.                                                             

            demo_netxduo_dhcp.c                             Corrected the host name.
            nxd_dhcp_client.c                               Returned the option value as host byte order.
                                                            Function is modified:
                                                              _nx_dhcp_interface_user_option_retrieve()
                                                            Fixed compiler errors when event trace is enabled.
                                                              Function is modified:
                                                              _nx_dhcp_client_send_with_zero_source_address()
                                                            Added a check for invalid characters in the host name.
                                                              Function is modified:
                                                              _nx_dhcp_create() 
                                                            Improved packet length verification.
                                                              Function is modified:
                                                              _nx_dhcp_packet_process()
                                                            Supported for adding user supplied options.
                                                              Functions are added or modified:
                                                              _nx_dhcp_send_request_internal()
                                                              _nx_dhcp_user_option_add_callback_set()
                                                              _nxe_dhcp_user_option_add_callback_set()
                                                            Fixed a bug that mutex is not released before return.
                                                              Function is modified:
                                                              _nx_dhcp_client_send_with_zero_source_address()
            nxd_dhcp_client.h                               Added a status for invalid characters in the host name.
                                                            Supported for adding user supplied options.
                                                            Updated the default value of NX_DHCP_CLIENT_MAX_RECORDS. 
            nxd_dhcp_server.c                               Fixed an error checking for interface index in _nx_dhcp_create_server_ip_address_list().
                                                            Removed #if 0 code for feature never implemented in
                                                              _nx_dhcp_server_extract_information().
                                                            Improved internal logic.
                                                            Fixed a compiler warning.
            nxd_dhcp_server.h                               Removed unused symbol:NX_DHCP_CLIENT_IDENTIFIER_MAX.
            demo_netxduo_dhcpv6.c                           Corrected the symbol name and value for hardware type.
            demo_netxduo_dhcpv6_client.c                    Corrected the symbol name and value for hardware type.
            nxd_dhcpv6_client.c                             Corrected the symbol name and value for hardware type.
                                                              Function is modified:
                                                              _nxe_dhcpv6_create_client_duid()
                                                            Added support for EUI-64 hardware type.  
                                                              Functions are modified:
                                                              _nx_dhcpv6_add_client_duid()
                                                              _nx_dhcpv6_add_server_duid()
                                                              _nx_dhcpv6_create_client_duid()
                                                              _nx_dhcpv6_process_client_duid()
                                                              _nx_dhcpv6_process_server_duid()
                                                              _nxe_dhcpv6_create_client_duid()
                                                            Added function to set the destination address where DHCP message should be sent.
                                                              Functions are modified:
                                                              _nx_dhcpv6_client_create()
                                                              _nx_dhcpv6_client_set_destination_address()
                                                              _nxe_dhcpv6_client_set_destination_address()
                                                            Corrected the logic for setting the source address.  
                                                              Function is modified:
                                                              _nx_dhcpv6_send_request()
                                                            Supported for rapid option.
                                                              Function is modified:
                                                              _nx_dhcpv6_scan_packet_options()
                                                            Improved packet length verification.
                                                              Function is modified:
                                                              _nx_dhcpv6_packet_process()
                                                            Improved internal logic.
                                                              Function is modified:
                                                              _nx_dhcpv6_add_client_ia()
                                                              _nx_dhcpv6_client_create()
                                                              _nx_dhcpv6_create_client_duid()
                                                              _nx_dhcpv6_get_valid_ip_address_lease_time()
                                                              _nx_dhcpv6_process_domain_name()
                                                              _nx_dhcpv6_process_server_duid()
                                                              _nx_dhcpv6_remove_assigned_address()
                                                            Added support for setting DHCPv6 server as default router.
                                                              Functions are modified:
                                                              _nx_dhcpv6_packet_process()
                                                              _nx_dhcpv6_register_IP_address()
                                                              _nx_dhcpv6_remove_assigned_address()          
            nxd_dhcpv6_server.c                             Fixed the bug for checking length.
                                                            Function is modified:
                                                              _nx_dhcpv6_server_process_iana()
                                                            Improved packet length verification.
                                                              Function is modified:
                                                              _nx_dhcpv6_listen_for_messages()
                                                            Improved internal logic.
                                                              Functions are modified:
                                                              _nx_dhcpv6_assign_ip_address()
                                                              _nx_dhcpv6_find_client_record_by_duid()
                                                              _nx_dhcpv6_add_ip_address_lease()
                                                              _nx_dhcpv6_create_ip_address_range()
                                                              _nx_dhcpv6_reserve_ip_address_range()
                                                              _nx_dhcpv6_retrieve_client_record()
                                                              _nx_dhcpv6_server_utility_time_randomize()
            nxd_dhcpv6_server.h                             Corrected the symbol name and value for hardware type.
            
            demo_netxduo_dns.c                              Supported for disabling IPv4 feature.
            nxd_dns.c                                       Added the check for record count pointer.
                                                            Functions are modified: 
                                                              _nxe_dns_ipv4_address_by_name_get()
                                                              _nxde_dns_ipv6_address_by_name_get()
                                                              _nxe_dns_domain_name_server_get()
                                                              _nxe_dns_domain_mail_exchange_get()
                                                              _nxe_dns_domain_service_get()
                                                            Supported for disabling IPv4 feature.
                                                            Dropped the chained packet to avoid memory overflow.
                                                            Improved packet length verification.
                                                            Fixed a bug that mutex is not released before return.
                                                            Improved internal logic.
                                                              Functions are modified:
                                                              _nx_dns_cname_get()
                                                              _nx_dns_host_text_get()
                                                              _nx_dns_authority_zone_start_get()
                                                              _nx_dns_host_resource_data_by_name_get()
                                                              _nx_dns_response_process()
                                                              _nx_dns_server_remove_internal()
                                                              _nx_dns_process_cname_type()
                                                              _nx_dns_process_txt_type()
                                                              _nx_dns_process_soa_type()
                                                              _nx_dns_cache_add_string()
                                                              _nx_dns_cache_delete_string()

            nxd_ftp_client.c                                Supported for disabling IPv4 feature. 
                                                            Dropped the chained packet to avoid memory overflow.
                                                            Improved internal logic.
            nxd_ftp_server.c                                Made the sprintf formats the same for LIST the command case in nx_ftp_server_command_process().
                                                            Added a sanity check for minimum packet payload size of the FTP server in _nx_ftp_server_create_internal().
                                                            Supported for disabling IPv4 feature.
                                                            Dropped the chained packet to avoid memory overflow.
                                                            Improved internal logic.
                                                            Corrected the logic for processing login/out.
                                                            Fixed a bug that causes crash when month is invalid.
            nxd_ftp_server.h                                Created a configuration option for defining minimum FTP server packet pool payload, NX_FTP_SERVER_MIN_PACKET_PAYLOAD,
                                                              and created an error status NX_FTP_INSUFFICIENT_PACKET_PAYLOAD if the payload is too small.     
                                                            Supported for disabling IPv4 feature. 
                                                            
            demo_netxduo_http.c                             Supported for disabling IPv4 feature.
            nxd_http_server.c                               Fixed the logic for multi packet GET request.
                                                            Improved internal logic.
            nxd_http_client.c                               Supported for disabling IPv4 feature. 

            nxd_mqtt_client.c                               Improved packet length verification.
                                                            Removed the usage of global variable for MQTT client.
                                                            Added logic to prevent packet ID value from being zero.
                                                            Fixed a bug that packet may be queued by TLS and can not be received.
                                                            Added a symbol for user to set initial packet ID value.
                                                            Improved internal logic.
                                                            Modified _nxd_mqtt_process_disconnect to use the NXD_MQTT_SOCKET_TIMEOUT as the wait option
                                                            Modified _nxd_mqtt_packet_allocate to use TLS packet allocate for TLS socket.  TLS packet allocate routine is able to 
                                                              take into consideration the TLS header size, including the crypto initial vector area.
                                                            Modified _nxd_mqtt_client_publish to fix packet leak, and use packet append API instead of memcpy to prevent data 
                                                              overflow the packet strcutre.
                                                            Modified _nxd_mqtt_client_sub_unsub to fix a ptoential packet leak under error conditions.
                                                            Modified _nxd_mqtt_client_disconnect to not exit if the send message calls returns an error. Added a call to delete the timer
                                                              so that a subsequent connect call will not error out when it tries to create the already existing timer. 
                                                            Modified _nxd_mqtt_thread_entry to delete the TCP socket. Added logic to check if 
                                                              timer, event flag group are already deleted before deleting. Moved the socket delete call to the end of the function  
                                                            Modified _nxd_mqtt_client_create to create the socket instead of in the connect call. Delete the MQTT thread if an error occurs.
                                                            Modified _nxd_mqtt_client_connect to remove the socket create call, and removed socket delete calls where an error is handled. 
                                                            Delete the timer if an error occurs. Replaced NX_WAIT_FOREVER with NXD_MQTT_SOCKET_TIMEOUT on the socket receive calls.  
                                                            Modified _nxd_mqtt_client_delete to wait for the nxd_mqtt_client_thread_entry to complete processing the DELETE event. 
                                                            Modified _nxde_mqtt_client_login_set to allow user to set username but not password.
                                                            Added call to delete the MQTT thread after the DELETE event is finished processing. 
                                                            Supported user defined memory functions.
                                                            Added symbols NXD_MQTT_REQUIRE_TLS, NXD_MQTT_SECURE_MEMCPY, NXD_MQTT_SECURE_MEMCMP, NXD_MQTT_SECURE_MEMSET, NXD_MQTT_SECURE_MEMMOVE for
                                                              security requirement.
                                                            Checked topic name and message lengths in runtime.
                                                            Allowed zero length of username and password.  
            nxd_mqtt_client.h                               Added NXD_MQTT_SOCKET_TIMEOUT to put a finite timeout for nx_tcp_socket_disconnect. 
                                                            The default value is NX_WAIT_FOREVER so no difference in behavior should be observed. 
                                                            Supported user defined memory functions. 

            nx_nat.c                                        Set different timeout for TCP and non-TCP seesion.
                                                            Functions are modified:
                                                              _nx_nat_inbound_entry_find()
                                                              _nx_nat_outbound_entry_find()
                                                            Added support for replacement when cache is full.
                                                              Function is modified:
                                                              _nx_nat_entry_create()
                                                            Corrected the logic for appending the overflowing data to the new packet.
                                                              Function is modified:
                                                              _nx_nat_ip_packet_send()
                                                            Improved packet length verification.
                                                              Function is modified:
                                                              _nx_nat_process_packet()
            nx_nat.h                                        Added symbols for TCP and non-TCP session timeout.
                                                            Added NX_NAT_ENABLE_REPLACEMENT.   

            demo_netxduo_pop3_client.c                      Increased packet payload to 1460 from 500, and clear final_packet local variable in
                                                            the loop that iterates to capture all the packets in a mail item.

            nxd_pop3_client.c                               Corrected the logic in _nx_pop3_client_mail_item_message_get for handling packets with only
                                                              the POP3 end marker tag indicating end of mail message.
                                                            Supported for disabling IPv4 feature.
                                                            Dropped the chained packet to avoid memory overflow.
                                                            Improved internal logic.
                                                            Fixed the logic for handling message and command in one packet.
            nxd_pop3_client.h                               Fixed the logic for handling message and command in one packet. 

            nx_ppp.c                                        Supported for transmitting PPP over Ethernet.
                                                            Functions are modified or added:
                                                              _nx_ppp_netx_packet_transfer()
                                                              _nx_ppp_packet_receive()
                                                              _nx_ppp_packet_send_set()
                                                              _nx_ppp_packet_transmit()
                                                              _nx_ppp_process_deferred_raw_string_send()
                                                              _nx_ppp_receive_packet_get()
                                                              _nx_ppp_thread_entry()
                                                              _nxe_ppp_packet_receive()
                                                              _nxe_ppp_packet_send_set()
                                                              _nxe_ppp_create()
                                                              
                                                              _nx_ppp_crc_append()
                                                              _nx_ppp_process_deferred_ip_packet_send()
                                                              _nx_ppp_lcp_code_reject()
                                                              _nx_ppp_lcp_configure_reply_send()
                                                              _nx_ppp_lcp_configure_request_send()
                                                              _nx_ppp_lcp_configuration_retrieve()
                                                              _nx_ppp_lcp_state_machine_update()
                                                              _nx_ppp_lcp_terminate_ack_send()
                                                              _nx_ppp_lcp_terminate_request_send()
                                                              _nx_ppp_pap_authentication_request()
                                                              _nx_ppp_pap_authentication_ack()
                                                              _nx_ppp_pap_authentication_nak()
                                                              _nx_ppp_pap_login_valid()
                                                              _nx_ppp_pap_state_machine_update()
                                                              _nx_ppp_chap_challenge_send()
                                                              _nx_ppp_chap_challenge_respond()
                                                              _nx_ppp_chap_challenge_validate()
                                                              _nx_ppp_chap_state_machine_update()
                                                              _nx_ppp_ipcp_configure_check()
                                                              _nx_ppp_ipcp_configure_request_send()
                                                              _nx_ppp_ipcp_response_extract()
                                                              _nx_ppp_ipcp_response_send()
                                                              _nx_ppp_ipcp_state_machine_update()
                                                              _nx_ppp_ipcp_terminate_ack_send()
                                                              _nx_ppp_ipcp_terminate_send()
                                                              _nx_ppp_raw_string_send()
                                                              _nx_ppp_receive_packet_process()                                                              
                                                            Added state check before start PAP, CHAP and IPCP.
                                                              _nx_ppp_packet_receive()
                                                            Corrected the logic for stopping PPP.
                                                              Functions are modified:
                                                              _nx_ppp_thread_entry()
                                                              _nx_ppp_lcp_state_machine_update()
                                                            Corrected the logic for processing LCP message.
                                                              Function is modified: 
                                                              _nx_ppp_receive_packet_process()
                                                            Corrected the logic for setting gateway address.
                                                              Function is modified: 
                                                              _nx_ppp_ipcp_state_machine_update()
                                                            Set the flag to distinguish PPP Server and PPP Client.
                                                              Function is modified: 
                                                              _nx_ppp_receive_packet_process()
                                                            Added functions to stop/start PPP.
                                                              Function are modified:
                                                              _nx_ppp_start()
                                                              _nx_ppp_stop()
                                                              _nxe_ppp_start()
                                                              _nxe_ppp_stop()
                                                            Improved packet length verification.
                                                              Function are modified:
                                                              _nx_ppp_chap_challenge_respond()
                                                              _nx_ppp_chap_challenge_validate()
                                                              _nx_ppp_ipcp_configure_check()
                                                              _nx_ppp_ipcp_response_extract()
                                                              _nx_ppp_pap_login_valid()
                                                              _nx_ppp_receive_packet_process()
                                                            Improved internal logic.
                                                              Function are modified:
                                                              _nx_ppp_chap_challenge_respond()
                                                              _nx_ppp_chap_challenge_validate()
                                                              _nx_ppp_chap_state_machine_update()
                                                              _nx_ppp_ipcp_state_machine_update()
                                                              _nx_ppp_lcp_state_machine_update()
                                                              _nx_ppp_pap_state_machine_update()
                                                            Added echo request statistics and corrected the length field in _nx_ppp_ping_request().
            nx_ppp.h                                        Supported for transmitting PPP over Ethernet.
                                                            Added functions to stop/start PPP.  

            demo_netxduo_smtp_client.c                      Supported for disabling IPv4 feature.
            nxd_smtp_client.c                               Fix compiler errors when event trace is enabled.
                                                            Supported for disabling IPv4 feature.
                                                            Dropped the chained packet to avoid memory overflow.
                                                            Improved packet length verification.
            nxd_smtp_client.h                               Removed unused API macro nxd_smtp_mail_send. 

            nxd_snmp.c                                      Supported for disabling IPv4 feature.
                                                            Dropped the chained packet to avoid memory overflow.
                                                            Added buffer length check.
                                                            Fixed packet leak issue.
                                                            Modified logic of converting to UCHARs for the buffer.
                                                            Removed logic setting boot count to one if not set.
                                                            Fixed a bug to use the trap security flags instead of the agent security flags.
                                                            Fixed bug to use context name from get request if agent context name not set.
                                                            Improved internal logic.
                                                            Modified nx_snmpv3_agent_engineboot_set to accept boot count of zero
                                                            Fixed nx_snmp_utility_object_data_get, nx_snmp_object_counter64_get/set, 
                                                              nx_snmp_object_octet_string.get for errors in data processing.
                                                             Added new parsing route nx_snmp_tlv_parse_data to parse the Type-Length-Value
                                                              field as per ASN1 specificactions, this also handles the 'long form' for integer types
                                                            Added check for counter64 type to nx_snmp_v1/v2/v3_processing 
                                                            Added an error response to nx_snmp_v1/v2/v3_processing if nx_snmp_object_data_get returns an error
                                                              instead of failing silently.
                                                            Modified nx_snmp_utility_object_data_get to accept a null IPv4 address. 
            nxd_snmp.h                                      Removed #include nx_tcp.h
                                                            Added macros for ASN1/BER standard symbols used in TLV parsing routine 
                                                            Added new error returns relevant to the TLV parsing added.
                                                            Redefined IPv6 address type as NX_SNMP_ASN1_OCTET_STRING
            demo_snmp_helper.h                              Removed #include nx_tcp.h and references to TCP configuration options defined in nx_tcp.h.
                                                            Added a get_octet_callback() which is similar to the get_callback except that it includes the length
                                                               arguement to accomodate the nx_snmp_object_octet_string_get API
                                                            Added a length field to MIB table for reading octet strings which not 0x0 delimited. 
                                                            Simplified the table to a few dozen OIDs instead of a hundreds of OID for ease of use.
                                                            Added atIPv6NetworkAddress[16] and MIB table entry for it for testing IPv6 address types
            demo_netxduo_snmp.c                             Simplified mib2_variable_update to be a comment that this is where MIB data can be updated at runtime. 
                                                            Removed printf statements.
                                                            Added check of status returns from SNMP API that were missing them. 
            demo_netxduo_mib2.c                             Removed the demo file since demo_netx_snmp.c is sufficient to demonstrate the use of SNMP API
                                                              for managing the MIB table.

            nxd_sntp_client.c                               Modified nx_sntp_client_utility_convert_seconds_to_date causing the date to be off by one day if NX_SNTP_CURRENT_YEAR
                                                              is older than the current date and a leapyear has occurred between that year and the current date.
                                                            Removed useless code.
                                                            Supported for disabling IPv4 feature.
                                                            Improved internal logic.
            nxd_sntp_client.h                               Modified comments.        

            nxd_telnet_client.h                             Removed NX_TELNET_MAX_OPTION_SIZE option and 
                                                              nx_telnet_client_request_option from CLIENT_REQUEST structure.
            nxd_telnet_client.c                             Supported for disabling IPv4 feature.
            nxd_telnet_server.c                             Dropped the chained packet to avoid memory overflow.

            nxd_tftp_client.c                               Supported for disabling IPv4 feature.            
                                                            Improved packet length verification.
                                                            Corrected the field size of block number.
            nxd_tftp_server.c                               Improved packet length verification.
                                                            Improved internal logic.
                                                            Corrected the field size of block number.
            nxd_tftp_client.h                               Corrected the field size of block number.
            nxd_tftp_server.h                               Corrected the field size of block number. 

            nx_web_http_client.c                            Added support for chunked transfer. Functions are added or modified:
                                                              _nx_web_http_client_chunked_size_get()
                                                              _nx_web_http_client_cleanup()
                                                              _nx_web_http_client_memicmp()
                                                              _nx_web_http_client_process_header_fields()
                                                              _nx_web_http_client_response_body_get()
                                                              _nx_web_http_client_response_read()
                                                              _nx_web_http_client_response_byte_expect()
                                                              _nx_web_http_client_response_chunked_get()
                                                              _nx_web_http_client_request_chunked_set()
                                                              _nx_web_http_client_request_packet_send()
                                                              _nx_web_http_client_request_initialize()
                                                              _nxe_web_http_client_request_chunked_set()
                                                              _nxe_web_http_client_request_packet_send()
                                                              _nx_web_http_client_delete()
                                                            Corrected the TCP header size in _nxe_web_http_client_put_packet().
                                                            Added support for keep-alive. Functions are added or modified:
                                                              _nx_web_http_client_connect()
                                                              _nx_web_http_client_process_header_fields()
                                                              _nx_web_http_client_secure_connect()
                                                            Corrected the wait option.
                                                            Functions are modified:
                                                              _nx_web_http_client_request_initialize()
                                                              _nx_web_http_client_request_header_add()
                                                              _nx_web_http_client_request_send()
                                                            Added support for returning all the status code in _nx_web_http_client_response_body_get().
                                                            Fixed the issue of TCP socket cleanup in _nx_web_http_client_secure_connect().
            nx_web_http_client.h                            Added support for chunked transfer.
                                                            Added support for keep-alive.
                                                            Added support for returning all the status code.
            nx_web_http_server.c                            Added support for chunked transfer. Functions are added or modified:
                                                              _nx_web_http_server_content_get()
                                                              _nx_web_http_server_packet_content_find()
                                                              _nx_web_http_server_packet_get()
                                                              _nx_web_http_server_content_get_extended()
                                                              _nx_web_http_server_receive_data()
                                                              _nx_web_http_server_get_process()
                                                              _nx_web_http_server_put_process()
                                                              _nx_web_http_server_callback_packet_send()
                                                              _nx_web_http_server_request_read()
                                                              _nx_web_http_server_request_byte_expect()
                                                              _nx_web_http_server_chunked_size_get()
                                                              _nx_web_http_server_request_chunked_get()
                                                              _nxe_web_http_server_response_chunked_set()
                                                              _nx_web_http_server_response_chunked_set()
                                                              _nx_web_http_server_chunked_check()
                                                              _nx_web_http_server_get_entity_header()
                                                              _nx_web_http_server_boundary_find()
                                                            Modified packet allocation function. Functions are added or modified:
                                                              _nx_web_http_server_basic_authenticate()
                                                              _nx_web_http_server_calculate_content_offset()
                                                              _nx_web_http_server_callback_data_send()
                                                              _nx_web_http_server_digest_authenticate()
                                                              _nx_web_http_server_get_process()
                                                              _nx_web_http_server_generate_response_header()
                                                              _nx_web_http_server_response_packet_allocate()
                                                              _nxe_web_http_server_response_packet_allocate()
            nx_web_http_server.h                            Added support for chunked transfer.
                                                            Added packet allocation function.
            nx_tcpserver.c                                  Corrected the wait time of TCP server socket accepting in _nx_tcpserver_connect_process().
            nx_tcpserver.h                                  Modified the default thread priority of TCP server.
            nx_web_http_common.h                            Added support for returning all the status code.
            demo_netxduo_https.c                            Fixed the compile errors.            
                                                
                                                
Release 5.10  05-10-2016

            nx_auto_ip.c                                    Optimized the logic for detecting address conflict.
                                                            Functions are modified or deleted:
                                                               _nx_auto_ip_arp_packet_send()
                                                               _nx_auto_ip_conflict()
                                                               _nx_auto_ip_create()
                                                               _nx_auto_ip_delete()
                                                               _nx_auto_ip_thread_entry()
                                                            Fixed the bug for checking interface status.
                                                            Function is modified:
                                                              _nx_auto_ip_thread_entry()                                                       
            nx_auto_ip.h                                      Optimized the logic for detecting address conflict.
            
            nxd_bsd.c                                       Included internal header file in C file.
                                                            Modified API functions:
                                                              getsockopt - Optimized the logic for keepalive feature.
                                                              recv - Added support for thread preemption.
                                                              setsockopt - Optimized the logic for keepalive feature.
                                                              socket - Optimized the logic for keepalive feature.
                                                              inet_ntop - Fixed endian swap when ntohl is not defined.
                                                            Modified internal functions:
                                                              _nxd_bsd_ipv6_packet_send - Modified the parameter list of _nx_icmpv6_send_ns.
                                                              inet_ntoa_internal - Fixed endian swap when ntohl is not defined.
                                                              nx_bsd_find_interface_by_source_addr - Fixed endian swap when ntohl is not defined.
                                                              nx_bsd_send_internal - Added a case for the error status NX_NO_PACKET.
            nxd_bsd.h                                       Included internal header file in C file.
            
            nxd_dhcp_client.c                               Optimized the logic for detecting address conflict.
                                                              The following functions are modified or added: 
                                                              _nx_dhcp_client_send_arp_probe()
                                                              _nx_dhcp_create()
                                                              _nx_dhcp_delete()
                                                              _nx_dhcp_ip_conflict()
                                                              _nx_dhcp_process()
                                                            Corrected the logic for setting the broadcast bit.
                                                              The following functions are modified:
                                                              _nx_dhcp_send_request_internal()
                                                            Corrected the logic for setting the target IP address.
                                                              The following functions are modified:
                                                              _nx_dhcp_send_request_internal()
                                                            Modified the logic for processing DHCP options.
                                                              The following functions are modified:
                                                              _nx_dhcp_extract_information()
                                                              _nx_dhcp_user_option_retrieve()
                                                              _nx_dhcp_get_option_value()
                                                              _nx_dhcp_search_buffer()
                                                            Added support for DHCP on multiple interfaces.
                                                              The following API are modified or added: 
                                                              _nx_dhcp_create()
                                                              _nx_dhcp_clear_broadcast_flag()
                                                              _nx_dhcp_client_send_with_zero_source_address()
                                                              _nx_dhcp_delete()
                                                              _nx_dhcp_decline()
                                                              _nx_dhcp_extract_information()
                                                              _nx_dhcp_force_renew()
                                                              _nx_dhcp_packet_process()
                                                              _nx_dhcp_reinitialize()
                                                              _nx_dhcp_release()
                                                              _nx_dhcp_request_client_ip()
                                                              _nx_dhcp_resume()
                                                              _nx_dhcp_suspend()     
                                                              _nx_dhcp_send_request()
                                                              _nx_dhcp_send_request_internal()
                                                              _nx_dhcp_server_address_get()
                                                              _nx_dhcp_set_interface_index()
                                                              _nx_dhcp_start()
                                                              _nx_dhcp_stop()
                                                              _nx_dhcp_thread_entry()
                                                              _nx_dhcp_timeout_entry()
                                                              _nx_dhcp_timeout_process()
                                                              _nx_dhcp_udp_receive_notify()
                                                              _nx_dhcp_user_option_retrieve()  
                                                              _nx_dhcp_client_get_record()
                                                              _nx_dhcp_client_restore_record()
                                                              _nx_dhcp_client_update_time_remaining()
                                                              _nx_dhcp_client_interface_get_record()
                                                              _nx_dhcp_client_interface_restore_record()
                                                              _nx_dhcp_client_interface_update_time_remaining()
                                                              _nx_dhcp_interface_clear_broadcast_flag()
                                                              _nx_dhcp_interface_enable()
                                                              _nx_dhcp_interface_disable()
                                                              _nx_dhcp_interface_decline()
                                                              _nx_dhcp_interface_force_renew()
                                                              _nx_dhcp_interface_reinitialize()
                                                              _nx_dhcp_interface_release()
                                                              _nx_dhcp_interface_request_client_ip()
                                                              _nx_dhcp_interface_start()
                                                              _nx_dhcp_interface_stop()
                                                              _nx_dhcp_interface_send_request()
                                                              _nx_dhcp_interface_server_address_get()
                                                              _nx_dhcp_interface_state_change_notify()
                                                              _nx_dhcp_interface_user_option_retrieve()
                                                              _nx_dhcp_interface_record_find()
                                                              _nxe_dhcp_interface_clear_broadcast_flag()   
                                                              _nxe_dhcp_interface_enable()
                                                              _nxe_dhcp_interface_disable()
                                                              _nxe_dhcp_interface_decline()  
                                                              _nxe_dhcp_interface_force_renew()    
                                                              _nxe_dhcp_interface_reinitialize() 
                                                              _nxe_dhcp_interface_release()      
                                                              _nxe_dhcp_interface_request_client_ip()
                                                              _nxe_dhcp_interface_start()
                                                              _nxe_dhcp_interface_stop()   
                                                              _nxe_dhcp_interface_send_request()
                                                              _nxe_dhcp_interface_server_address_get() 
                                                              _nxe_dhcp_interface_state_change_notify()
                                                              _nxe_dhcp_interface_user_option_retrieve()
                                                              _nxe_dhcp_client_interface_get_record()         
                                                              _nxe_dhcp_client_interface_restore_record() 
                                                              _nxe_dhcp_client_interface_update_time_remaining()
                                                            Modified the logic for updating DHCP timeout. 
                                                             The following functions are modified:
                                                              _nx_dhcp_update_timeout() 
                                                              _nx_dhcp_packet_process()
                                                              _nx_dhcp_timeout_entry()
                                                              _nx_dhcp_interface_record_find()
                                                              _nx_dhcp_ip_conflict()
                                                              _nx_dhcp_thread_entry()
            nxd_dhcp_client.h                               Fixed compiler warnings.
                                                            Modified the logic for processing DHCP options.
                                                            Added support for DHCP on multiple interfaces.
            nxd_dhcp_server.c                               Added flag events to process packet receive event, fast periodic event and slow periodic event.
                                                            Functions are modified or renamed: 
                                                              _nx_dhcp_server_create()
                                                              _nx_dhcp_server_delete()
                                                              _nx_dhcp_fast_periodic_timer_entry()
                                                              _nx_dhcp_slow_periodic_timer_entry()
                                                              _nx_dhcp_server_thread_entry()
                                                              _nx_dhcp_listen_for_messages()
                                                              _nx_dhcp_server_packet_process()
                                                            Fixed packet leaks in _nx_dhcp_respond_to_client_message().
                                                            Added mutex protection.
                                                              Functions are modified: 
                                                              _nx_dhcp_create_server_ip_address_list()
                                                              _nx_dhcp_set_interface_network_parameters()
                                                              _nx_dhcp_clear_client_record()
            nxd_dhcp_server.h                               Added flag events to process packet receive event, fast periodic event and slow periodic event.            
            nxd_dhcpv6_server.c                             Fixed the typo, rename NX_DHCPV6_STATUS_NO_ADDRS_AVAILABLE to NX_DHCPV6_STATUS_MESSAGE_NO_ADDRS_AVAILABLE.
            nxd_dhcpv6_server.h                             Fixed the typo, rename NX_DHCPV6_STATUS_NO_ADDRS_AVAILABLE to NX_DHCPV6_STATUS_MESSAGE_NO_ADDRS_AVAILABLE.
            
            nxd_ftp_server.c                                Renamed _nx_ftp_server_control_disonnect_processing to nx_ftp_server_control_disconnect_processing.
                                                            Added a check on status return from FileX file write and file create calls in _nx_ftp_server_command_process
                                                              and _nx_ftp_server_data_process. 
            nxd_ftp_server.h                                Renamed _nx_ftp_server_control_disonnect_processing to nx_ftp_server_control_disconnect_processing.
            nxd_ftp_client.c                                Added support for PASV, passive transfer mode
                                                            Added IPv6 support to nx_ftp_client_directory_listing_get
            nxd_ftp_client.h                                Added support for PASV, passive transfer mode            
            
            demo_netxduo_http.c                             Fix a bug that memory of ram disk is corrupted.
            nxd_http_client.c                               Allow zero or more whitespaces between Content-Length and value
                                                             in nx_http_client_content_length_get()                                             
                                                            Optimized the code.
                                                             _nx_http_client_content_length_get()
                                                            Fixed packet leak for invalid HTTP packet in _nxd_http_client_get_start
                                                             and _nx_http_client_get_packet.
                                                            Corrected the logic in _nxd_http_client_get_start when checking
                                                             offset against the packet length
                                                            Modified nxd_http_client_get_start() and nxd_http_client_put_start()
                                                             to accept a URI resource string that refers to a full website
                                                             e.g. http://abc.def.com/index.htm.
                                                            Added nx_http_client_set_connect_port() service to allow the Client 
                                                             to change the HTTP server port at runtime. 
            nxd_http_client.h                               Declare the nx_http_client_set_connect_port() service
            
            nxd_pop3_client.c                               Returned NX_SUCCESS only if the positive response consists of "+OK".
                                                            Functions are modified:
                                                              _nx_pop3_client_mail_item_get()
                                                              _nx_pop3_client_mail_item_delete()
                                                              _nx_pop3_client_quit()


Release 5.9   02-22-2016

            demo_netx_auto_ip.c                             Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.
                                                            Fixed compiler warnings.
                                                             
            nx_auto_ip.c                                    Fixed one bug that hardware address is set as zero if IP instance is uninitialized.
                                                            Fixed compiler warnings.
                                                            Corrected the value of NX_AUTO_IP_END_ADDRESS.
                                                             
            bsd_demo_raw.c                                  Unified ticks per second. 
                                                            Fixed compiler warnings.
            bsd_demo_tcp.c                                  Unified ticks per second. 
                                                            Fixed compiler warnings.
            bsd_demo_udp.c                                  Unified ticks per second. 
                                                            Fixed compiler warnings.
            nxd_bsd.c                                       Fixed compiler warnings.
                                                            Modified API functions:
                                                              bsd_initialize - Returned error when extended notify feature was disabled.
                                                              recv - Fixed return value when peer shutdown orderly.
                                                                     Fixed statistics of TCP socket.
                                                              send - Fixed length of data sent.
                                                              sendto - Fixed length of data sent.
                                                              connect - Fixed errno when connection timeouts.
                                                              bind - Added logic to allow TCP IPv4 and IPv6 sockets to share a port if reuse is enabled 
                                                                     on the sockets (which it is by default. This lets BSD emulate a TCP client socket that accepts
                                                                     and transmits IPv4 and IPv6 packets. 
                                                              inet_addr - Corrected the status process of inet_aton.
                                                              setsockopt - Unified ticks per second. 
                                                                           Added support for SO_SNDTIMEO option.
                                                                           Renamed symbols from NX_TCP_ENABLE_KEEPALIVE to NX_ENABLE_TCP_KEEPALIVE,
                                                                           and from NX_TCP_ENABLE_WINDOW_SCALING to NX_ENABLE_TCP_WINDOW_SCALING.
                                                              select - Unified ticks per second. 
                                                                       Fixed statistics of TCP socket.
                                                            Modified internal functions:
                                                              bsd_initialize - Used tx_thread_sleep instead of setting event from timer.
                                                              nx_bsd_select_wakeup - Cleared fd_sets in suspend info if they were not met.
                                                              nx_bsd_send_internal - Supported to return length of data sent. 
                                                                                     Fixed timeout for packet process.
                                                                                     Added support for SO_SNDTIMEO option.
                                                              nx_bsd_socket_set_inherited_settings - Renamed symbols from NX_TCP_ENABLE_KEEPALIVE to NX_ENABLE_TCP_KEEPALIVE,
                                                                                                     and from NX_TCP_ENABLE_WINDOW_SCALING to NX_ENABLE_TCP_WINDOW_SCALING.
                                                              nx_bsd_tcp_socket_disconnect_notify - Fixed errno when connection timeouts.
                                                              nx_bsd_timer_entry - Used tx_thread_sleep instead of setting event from timer.
                                                              nx_bsd_thread_entry - Used tx_thread_sleep instead of setting event from timer.      
            nxd_bsd.h                                       Added support for unified timer tick macros.
                                                            Defined return code for environment error.
                                                            Modified the type of time_t and suseconds_t from ULONG to LONG.

            demo_netxduo_dhcp.c                             Unified ticks per second.
                                                            Simplified the demo.
                                                            Fixed compiler warnings.

            nxd_dhcp_client.c                               Unified ticks per second.
                                                            Added support for sending maximum DHCP message size option.
                                                            Changed the logic to check the DHCP state to update the time remaining in renew and rebind states.
                                                            Optimized the algorithm for calculating random time.
                                                            Corrected the logic for sending ARP probe and restarting configuration.
                                                            Fixed compiler warnings.
                                                            Set the source address field in the IP header to 0 for DHCP messages that client obtaining its IP address.
            nxd_dhcp_client.h                               Unified ticks per second.
                                                            Added support for sending maximum DHCP message size option.
                                                            Added symbol names for sending ARP probe and restarting configuration.
                                                            Fixed compiler warnings.
            nxd_dhcp_server.c                               Unified ticks per second in nx_dhcp_server_create(). 
                                                            Optimized process logic in nx_dhcp_server_thread_entry().         
                                                            Fixed a packet leak in nx_dhcp_listen_for_message().                                                            
                                                            Fixed the bug for user options seek in nx_dhcp_server_extract_information.
                                                            Initialized dhcp client in nx_dhcp_listen_for_message.
                                                            Copied the incoming data in one packet from dhcp server pool in nx_dhcp_listen_for_messages.
                                                            Fixed a bug in nx_dhcp_server_extract_information to initialize the dhcp_client_ptr to NULL in the event
                                                            the function encounters an invalid packet. Previously, the function returned a garbage dhcp_client_ptr to 
                                                            the caller which would then dereference it and get an exception.                                                            
                                                            Send NACK message if the client's requested IP address is incorrect in _nx_dhcp_validate_client_message.
                                                            Simplified the logic to find, record and clear the IP address owner.                                                            
                                                            Fixed compiler warnings.
            nxd_dhcp_server.h                               Unified ticks per second.
                                                            Adjusted the default value of configuration options.                                                    
                                                            Optimized the structure.  
            demo_netxduo_dhcpv6.c                           Unified ticks per second.
                                                            Simplified the demo.
                                                            Fixed compiler warnings.
            demo_netxduo_dhcpv6_client.c                    Unified ticks per second.
                                                            Fixed compiler warnings.
            nxd_dhcpv6_client.c                             Unified ticks per second.            
                                                            Verified the incoming data does not exceed our DHCPv6 Client packet payload in _nx_dhcpv6_packet_process().                                                            
                                                            Fixed the bug for setting IPv6 address change notify in _nx_dhcpv6_client_create().                                                            
                                                            Fixed the bug for setting address status in _nx_dhcpv6_register_IP_address().
                                                            Renamed symbols from NX_IPV6_ADDRESS_CHANGE_NOTIFY_ENABLE to NX_ENABLE_IPV6_ADDRESS_CHANGE_NOTIFY,
                                                              NXDUO_DISABLE_DAD to NX_DISABLE_IPV6_DAD since NetX Duo renamed these symbols.
                                                            Fixed compiler warnings.
            nxd_dhcpv6_client.h                             Unified ticks per second.
                                                            Added conditional code for DAD notify declaration.
                                                            Renamed symbols from NX_IPV6_ADDRESS_CHANGE_NOTIFY_ENABLE to NX_ENABLE_IPV6_ADDRESS_CHANGE_NOTIFY,
                                                              NXDUO_DISABLE_DAD to NX_DISABLE_IPV6_DAD since NetX Duo renamed these symbols.
                                                            Fixed compiler warnings.  
            nxd_dhcpv6_server.c                             Unified ticks per second.
                                                            Copied the incoming data in one packet from dhcpv6 server pool in nx_dhcpv6_listen_for_messages.                                                            
                                                            Fixed the bug for IPv6 address get.
                                                            Fixed compiler warnings.
            nxd_dhcpv6_server.h                             Unified ticks per second.            
                                                            Fixed the bug for IPv6 address get.   
                                                            
            demo_netxduo_dns.c                              Unified ticks per second.             
                                                            Fixed compiler warnings.
            nxd_dns.h                                       Unified ticks per second.
                                                            Removed the symbol NX_DNS_CLIENT_IP_GATEWAY_ADDRESS.                                                    
            nxd_dns.c                                       Unified ticks per second.
                                                            Modified the logic to send DNS query in _nx_dns_host_resource_rdata_by_name_get and 
                                                              _nx_dns_host_by_address_get_internal.
                                                            Modified the return status in _nx_dns_send_query_by_address. 
                                                            Modified the return status if answer_found is true in _nx_dns_response_process.                                                             
                                                            Modified the logic for setting the IP gateway server to be the DNS Server in _nx_dns_create.                                                            
                                                            Added check for malformed packet.                    
                                                            Fixed compiler warnings.
                                                            Added the check for record_count_pointer. 

            demo_netxduo_ftp.c                              Unified ticks per second.
                                                            Fixed compiler warnings.
            nxd_ftp_client.c                                Fixed compiler warnings.
            nxd_ftp_server.c                                Cleared socket resource when ftp server is stopped.
                                                            Optimized the logic.
                                                            Fixed a bug for calculating the length of file info.
                                                            Fixed compiler warnings.
            nxd_ftp_server.h                                Unified ticks per second. 
                                                            Added event to stop ftp server.  

            demo_netxduo_http.c                             Unified ticks per second. 
                                                            Fixed compiler warnings.
            nxd_http_client.h                               Unified ticks per second. 
            nxd_http_client.c                               Removed trailing space on HTTP/1.0.
            nxd_http_server.h                               Unified ticks per second. 
                                                            Declared missing function headers.
            nxd_http_server.c                               Cleared socket resource when stopped. 
                                                            Fixed first MIME type in the default array.
                                                            Fixed compiler warnings.      

            demo_netx_nat.c                                 Unified ticks per second. 
            nx_nat.c                                        Unified ticks per second.
                                                            Fixed compiler warnings.
                                                            Modified the logic for packet processing and sending since all 
                                                              the fragments are assembled before forwarding.
                                                              Functions are modified:
                                                              _nx_nat_process_packet()
                                                              _nx_nat_ip_packet_send()
            nx_nat.h                                        Unified ticks per second.  

            demo_netxduo_pop3_client.c                      Unified ticks per second. Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.
                                                            Fixed compiler errors.
            nxd_pop3_client.c                               Unified ticks per second. Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.
                                                            Fixed compiler errors.
                                                            Fixed number checking.
            nxd_pop3_client.h                               Unified ticks per second. Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.    

            demo_netx_ppp.c                                 Unified ticks per second.
                                                            Fixed compiler warnings.
            nx_ppp.c                                        Replaced hard numbers with PPP symbols for PPP codes, protocols, options and protocol states.
                                                            Added _nx_ppp_debug_log_capture_protocol function to outputs the status of various protocols and timeouts of the specified PPP instance.
                                                            Added support for the secondary DNS option in the IPCP protocol.
                                                            Added a retry limit on IPCP NAK list requests with primary and secondary DNS options so that
                                                              IPCP can complete if either address is not available.
                                                            Added NXE function for error checking.
                                                            Fixed compiler warnings.
            nx_ppp.h                                        Unified ticks per second.
                                                            Defined PPP symbols for naked list options.
                                                            Added _nx_ppp_debug_log_capture_protocol prototype.
                                                            Modified the NX_PPP data block to contain a secondary DNS address and count of retries on IPCP
                                                              config requests with DNS address options.             
                                                            Added #defines for maximum retries on IPCP requests containing DNS options.
                                                            Added services for setting and getting the primary and secondary DNS addresses.
                                                            Added NXE function for error checking.
                                                            Fixed the compiler error if defined NX_PPP_DISABLE_INFO.   

            demo_netxduo_smtp_client.c                      Unified ticks per second.
                                                            Fixed compiler warnings.
            nxd_smtp_client.c                               Unified ticks per second.
                                                            Removed unused code and simplified SMTP client data types
                                                            Fixed packet leaks in various functions
                                                            Added logic for SMTP servers not configured for authentication
                                                            Added option for SMTP Client to skip authentication (NX_SMTP_CLIENT_AUTH_NONE)
                                                            Fixed problems handling multi-packet response from the server to client EHLO
                                                            Check socket state and delete TCP socket in nx_smtp_client_delete() before clearing SMTP Client memory
                                                            Modified _nx_smtp_utility_parse_server_services() not to set AUTH type if the current 250 packet does not
                                                               contain the AUTH keyword. Otherwise the client authentication type may not be set correctly.
                                                            Fixed compiler warnings.
            nxd_smtp_client.h                               Unified ticks per second. Remove definitions of NX_SMTP_MILLISECONDS_PER_TICK and NX_SMTP_TICKS_PER_SECOND.
                                                            Added logic for SMTP servers not configured for authentication
                                                            Added option for SMTP Client to skip authentication (NX_SMTP_CLIENT_AUTH_NONE)
                                                            Removed unused code and simplified SMTP client data types        

            demo_netxduo_mib2.c                             Unified ticks per second.
                                                            Fixed compiler warnings.
            demo_netxduo_snmp.c                             Unified ticks per second.
                                                            Fixed compiler warnings.
                                                            Replace #ifdef ENABLE_V3 with #ifndef NX_SNMP_DISABLE_V3 to eliminate compile errors
                                                              if NX_SNMP_DISABLE_V3 is defined in SNMP.
            demo_snmp_helper.h                              Fixed compiler warnings.
            nxd_snmp.c                                      Modified nx_snmp_version3_report_send() :
                                                                1) never encrypt data in a report response
                                                                2) never to set encryption or reportable bit in security header flags field,
                                                                3) if sending time synchronization report, only use authentication even if encryption is enabled,
                                                                4) never send boot data in response to a discovery request.
                                                            Modified nx_snmp_version3_process() :
                                                                1) Flags in the security header should never have reportable bit sent
                                                                2) never send boot data if authentication is not enabled.
                                                            Modified nx_snmp_version3_process where it sets the request_type_ptr
                                                                for returning the request packet with an error status.
                                                            Renamed _nx_snmp_utility_request_type_set_A5 to _nx_snmp_utility_request_type_set_multibyte
                                                            Removed _nx_snmp_utility_request_type_set (use only _nx_snmp_utility_request_type_set_1byte)
                                                            Modified nx_snmp_send_error_response() and nx_snmp_encrypt_pdu for handling SNMPV3 request packet PDUs
                                                                for error messages when security is enabled.
                                                            Replaced 1 byte data size fields with 2 byte data size fields in sequence headers in trap send,
                                                                and SNMP message process functions, wherever there is a possibility the data may exceed 128 bytes
                                                                (and thus require 2 bytes).
                                                            Modified logic in data object get functions to determine the size of the data size field rather than
                                                                assume 2 bytes (e.g. _nx_snmp_utility_community_get, _nx_snmp_utility_object_id_get,
                                                                _nx_snmp_utility_object_data_get).
                                                            Fixed a bug in _nx_snmp_agent_encrypt_pdu for not adjusting encrypted PDU length for non-zero padding.
                                                            Added a null pointer check for the object list pointer in the trap functions when going through
                                                                the PDU object list items.
                                                            Added NX_SNMP_V3_DISABLE conditional compile directives around global PDU processing variables and in
                                                                _nx_snmp_version_error_response relevant for V3 security specific processing.
                                                            Fixed compiler warnings.
                                                            Minor correction masking the length variable.
            nxd_snmp.h                                      Renamed _nx_snmp_utility_request_type_set_A5 to _nx_snmp_utility_request_type_set_multibyte.
                                                            Removed _nx_snmp_utility_request_type_set (use only _nx_snmp_utility_request_type_set_1byte).
                                                            Changed the order of internal functions for more logical grouping.
                                                            Unified ticks per second.
                                                            Added #ifdef NX_SNMP_V3_DISABLE checks around #includes for authentication
                                                                and encryption key processing, and around API fucntions that compute and activate keys.
                                                            Removed unused extern nx_system_ticks_per_second.            

            demo_netxduo_sntp_client.c                      Unified ticks per second.
                                                            Updated the demo for creating SNTP client packet pool.
                                                            Fixed compiler warnings.
            nxd_sntp_client.c                               Modified nx_sntp_client_get_msecs_diff to simplify the logic
                                                            Modified nx_sntp_client_server_clock_dispersion_check to simplify the logic
                                                            Reworked the logic in nx_sntp_client_utility_get_msec_diff to add back in flag for postive or 
                                                              negative difference. Some use cases in NetX SNTP Client regard a negative difference as an error. 
                                                            Modified nx_sntp_client_utility_convert_secs_to_date to handle a date stamp in a year 
                                                              after NX_SNTP_CURRENT_YEAR.
                                                            Created new API  _nx_sntp_client_request_unicast_time to request unicast updates asynchronously of the
                                                              SNTP Client thread task. 
                                                            Simplified the completion status logic for _nx_sntp_client_process_update_packet
                                                            Removed unnecessary input for _nx_sntp_client_receive_time_update and _nx_sntp_client_apply_sanity_checks, 
                                                            Fixed the logic to check if the update time has expired without a response. 
                                                            Modified nx_sntp_client_initialize_broadcast to handle invalid parameter input. 
                                                            Created nx_sntp_client_set_time_update_notify to set a callback when the SNTP Client receives a valid 
                                                              SNTP update. 
                                                            Simplified logic for valid packet processing in _nx_sntp_client_process_broadcast.
                                                            Simplified error code in _nx_sntp_client_apply_sanity_checks.
                                                            Modifiied _nx_sntp_client_process_time_data to add status check for adding msec to ntp time.
                                                            Unified ticks per second.
                                                            Fixed a bug when multiple packets were received and the first one was invalid,
                                                              other packets were not processed in time.
                                                            Fixed compiler warnings.
            nxd_sntp_client.h                               Modified nx_sntp_client_server_clock_dispersion_check declaration for changes to input args
                                                            Created new API  nx_sntp_client_request_unicast_time()
                                                            Removed unnecessary input for _nx_sntp_client_receive_time_update and _nx_sntp_client_apply_sanity_checks, 
                                                            Added support for nx_sntp_client_set_time_update_notify() callback.
                                                            Unified ticks per second.
                                                            Removed unused macros. 
                                                            Fixed compiler warnings.        

            demo_netxduo_telnet.c                           Unified ticks per second.
                                                            Fixed compiler warnings.            
            nxd_telnet_server.c                             Added support for external packet pool creation for use when NX_TELNET_SERVER_OPTION_DISABLE
                                                              is not defined and the Telnet Server needs a packet pool to send Telnet options. 
                                                            Created _nx_telnet_server_packet_pool_set() API for applications to set the Telnet Server packet
                                                              pool if NX_TELNET_SERVER_USER_CREATE_PACKET_POOL is defined.  The default is the Telnet Server
                                                              creates the packet pool.
                                                            Cleared socket resource when telnet server is stopped.                  
                                                            Modified nx_telnet_server_process_options to move the offset for all responses to the ECHO request.
                                                            Fixed a bug when packet contains command and data, data are not processed.
                                                            Fixed compiler warnings.                                          
            nxd_telnet_server.h                             Added support for for external packet pool creation with configuration option 
                                                              NX_TELNET_SERVER_USER_CREATE_PACKET_POOL and API nx_telnet_server_packet_pool_set().                                                   
                                                            Unified ticks per second.
                                                            Added event to stop telnet server.
            nxd_telnet_client.h                             Removed unused macro.   

            demo_netxduo_tftp.c                             Unified ticks per second.
                                                            Fixed compiler warnings.
            nxd_tftp_server.c                               Added support for a retransmit feature where a packet is
                                                             retransmitted if the correct data or ACK from the TFTP Client
                                                             is not received within user specified timeout period.
                                                            Added logic to handle duplicate WRITE or READ requests e.g. the 
                                                            TFTP server is delayed responding to the first request and while
                                                              processing it receives one or more duplicate requests (which are dropped).
                                                            Fixed packet leak.
                                                            Fixed compiler warnings.
            nxd_tftp_server.h                               Added support for a retransmit feature.
            nxd_tftp_client.c                               Fixed compiler warnings.            

                                                             
Release 5.8   01-12-2015

            nx_auto_ip.c                                    Added NX_RAND to replace rand to get the random value.

            nxd_bsd.c                                       Added API functions:
                                                              inet_pton - This function converts an IP address from presentation to numeric.
                                                              inet_ntop - This function converts an IP address from numeric to presentation.
                                                              getaddrinfo - This function returns one or more addrinfo structures according
                                                                            to the specified node and service.
                                                              freeaddrinfo - This function releases the memory allocated by getaddrinfo.
                                                              getnameinfo - This function converts a socket address to a corresponding host and service.
                                                            Modified API functions:
                                                              socket - Improved UDP and raw socket performance. 
                                                              connect - Fixed error status when connection fails in blocking mode.
                                                              bind   - Fixed a bug in local bound port, improved UDP socket performance. 
                                                              accept - Cleared the INPROGRESS flag when connection is established.
                                                              getsockname - Fixed port value for UDP socket.
                                                              recv   - Fixed how socket timeout is handled.  Socket doing blocked receive
                                                                       with timeout value would not wake up if there are other BSD sockets
                                                                       receiving data. Fixed return code. Supported flags MSG_PEEK and MSG_DONTWAIT.
                                                              recvfrom - Supported flags MSG_PEEK and MSG_DONTWAIT.
                                                              select - Fixed fd_set value when socket is not in use.
                                                                       Removed an obsolete for loop clearing blocked sockets for new connection requests.
                                                              send - Supported raw PPPOE. Supported flags MSG_DONTWAIT.
                                                              sendto - Supported raw PPPOE. Supported flags MSG_DONTWAIT.
                                                              soc_close - Improved UDP and raw socket performance.
                                                                          Added support for NX_BSD_TCP_SOCKET_DISCONNECT_TIMEOUT in the nx_tcp_socket_disconnect call.
                                                                          Fixed a bug that secondary socket was not disconnected. 
                                                              ioctl  - Added logic for applications to clear the non-blocking flag.
                                                                       Modified FIONREAD option to capture the correct number of bytes received on the UDP socket
                                                              inet_ntoa  - Move logic to internal function inet_ntoa_internal.
                                                              inet_aton - Added an error return if an invalid character is received
                                                                          for base-16 address buffer. Fixed a bug of processing hex number.
                                                              FD_SET - Fixed FD_SETSIZE check
                                                              FD_CLR - Fixed FD_SETSIZE check
                                                              FD_ISSET - Fixed FD_SETSIZE check
                                                              FD_ZERO  - Fixed FD_SETSIZE value
                                                            Added internal functions:
                                                              nx_bsd_pppoe_internal_sendto - This function sends raw PPPOE packet to driver directly.
                                                              _nx_bsd_pppoe_packet_received - This function receives raw PPPOE packet from driver directly.
                                                              inet_ntoa_internal - This function converts an IPv4 address to a string and 
                                                                                   returns the size of the string.
                                                              bsd_string_to_number - This function converts string to number.
                                                              nx_bsd_set_service_list - This function lets user set the service list used by getaddrinfo.
                                                              _nx_bsd_string_length - This function returns the length of string.
                                                            Modified internal functions:
                                                              bsd_initialize - Supported getaddrinfo and getnameinfo APIs.
                                                              nx_bsd_timeout_process - Corrected the logic and comment to skip client sockets.
                                                              nx_bsd_send_internal - Remove unnecessary code. Supported flags MSG_DONTWAIT.
                                                              bsd_number_convert - Added support for HEX number. Added argument to avoid overflow. 
                                                              nx_bsd_raw_socket_filter - Improved the raw socket search logic.
                                                              nx_bsd_tcp_create_listen_socket - Fixed a bug to allow accept from remote end.
                                                              nx_packet_data_extract_offset - Fixed a bug when offset and length of packet are both zero.
                                                              nx_bsd_udp_packet_received - Improved the UDP socket search logic
                                                              nx_bsd_tcp_syn_received_notify - Fixed connection status
                                                              _nxd_bsd_ipv4_packet_send - Encapsulated all IGMP-related infomation.
                                                            Removed internal functions: nx_bsd_isascii
            nxd_bsd.h                                       Fixed FD_SETSIZE, added PPPOE and DNS support,
                                                              added inet_pton, inet_ntop, getnameinfo, getaddrinfo, freeaddrinfo services,
                                                              supported flags MSG_PEEK.
                                                              New configuration option for TCP socket disconnect, NX_BSD_TCP_SOCKET_DISCONNECT_TIMEOUT.
                                                              The default value is 1 (timer tick) 
                                                              
            nxd_dhcp_client.c                               Removed MULTI_HOME_NETXDUO/MULTI_HOME_NETX macro definition.
                                                            Fixed a bug in nx_dhcp_search_buffer() that could potentially casue buffer overflow
                                                            Fixed a packet leak in nx_dhcp_process() in the REQUEST state. 
                                                            Replaced rand() with NetX Duo macro NX_RAND
                                                            Updated nx_dhcp_process and nx_dhcp_send_request_internal for updating the 'secs' field 
                                                                in the DHCP client header for those DHCP servers that expect this field to be updated. 
                                                            Fixed a bug in nx_dhcp_add_randomize that could potentially cause a huge random delay factor
                                                            Added nx_dhcp_clear_broadcast_flag service for cases where the DHCP server is behind
                                                                a router and the server must be able to send unicast messages.
                                                            Added nx_dhcp_seconds to the DHCP Client structure for filling in the 'secs' field in 
                                                                the DHCP header.
                                                            Modified calls for allocating packets so that NetX Duo DHCP CLient will also compile and run
                                                                in a NetX environment.                                                                 
                                                            Modified nx_dhcp_process for DHCP CLient to update the IP router and IP address from ACKs received
                                                                from the server in the RENEW and REBIND state. 
                                                            Modified the clear gateway address call function to match NetX Duo 5.8 
                                                            Remove the nx_packet_data_extract_offset function since nx_packet_data_extract_offset function
                                                                is defined in NetX/NetXDuo 5.8
                                                            Fixed the bug of DHCPv4 Client option added operation: added Server identifier option in DHCP Decline and Release messages, 
                                                                removed Host name option in DHCP Decline and Release messages.
                                                            Remove the internal function from nxd_dhcp_client.h into nxd_dhcp_client.c.
                                                            _nx_dhcp_client_send_arp_probe modified to check if an arp entry with matching IP address 
                                                            does not have a non-zero MAC address.
                                                            Modified the logic to get DHCP option value to avoid using the released packet in _nx_dhcp_user_option_retrieve.
                                                            Processed the DNS and NTP server options in _nx_dhcp_extract_information.

            nxd_dhcp_client.h                               Modified definition of NX_DHCP_PACKET_PAYLOAD so that NetX Duo DHCP CLient will also compile and run
                                                              in a NetX environment.                                                                  
                                                            Added nx_dhcp_seconds to the DHCP CLIENT struct.
                                                            Added nx_dhcp_clear_broadcast_flag service for cases where the DHCP server is behind
                                                              a router and the server must be able to send unicast messages.
                                                            Added variables to store DNS and NTP server addresses.
            nxd_dhcp_server.c                               Modified the process of DHCP Server response message, set the correct destination address 
                                                            and destination port according to the 'giaddr', 'ciaddr' and broadcast bit. 
                                                            Modified the logic in nx_dhcp_server_validate_client_message to delay
                                                            NACKs to finish checking for invalid data which requires the Server
                                                            to respond silently.
                                                            Added logic in nx_dhcp_listen_for_messages to check for invalid DHCP packet length
                                                            being less than NX_DHCP_HEADER_SIZE.                                    
                                                            Removed the MULTI_HOME_NETXDUO macro definition.
                                                            Fixed a bug of DHCPv4 Server option added operation
                                                            Removed the internal function from nxd_dhcp_server.h into nxd_dhcp_server.c.
                                                            Used API to get the interface instead of directly getting the internal parameters.
                                                            Corrected memset in nx_dhcp_server_create_ip_list() for the size input arguement.
            nxd_dhcp_server.h                               Created a new error status for malformed packets (0xA4).  Added a new define for
                                                            DHCP header size (no option bytes)  NX_DHCP_HEADER_SIZE.                                                             
                                                            Removed the MULTI_HOME_NETXDUO macro definition. 
                                                            Removed useless function declaration (nx_dhcp_create_server_ip_address_list_text).
            nxd_dhcpv6_client.c                             Created nx_dhcpv6_get_valid_ip_address_prefix service for obtaining the prefix of 
                                                            addresses assigned by DHCPv6 servers.
                                                            Modified nx_dhcpv6_thread_entry to automatically restart the SOLICIT messages if the DHCPv6 Client
                                                            IPv6 address expires. Previously it put the DHCPv6 Client in the INIT state, requiring the DHCPv6
                                                            Client app to manually restart the SOLICIT messages.                                               
                                                            Created nx_dhcpv6_get_time_server_address service for obtaining the time server address assigned by DHCPv6 Servers.
                                                            Added support for the FQDN option to the DHCPv6 Client, with new API nx_dhcpv6_request_option_FQDN
                                                            Fixed the bug for NoAddrsAvail status in nx_dhcpv6_process()
                                                            Modified the nx_dhcpv6_server_error_handler function; the message type should be the type of received message 
                                                            and defined status codes to reflect the error (see nxd_dhcpv6_client.h). 
                                                            Modified the nx_dhcpv6_resume function to support for DHCPv6 state restore feature.
                                                            Added nx_dhcpv6_client_get_record and nx_dhcpv6_client_restore_record functions to realize the DHCPv6 Client restore feature.
                                                            Added _nx_dhcpv6_flush_queue_packets function to flush the useless queue packets 
                                                            Loop to receive the queue packets until get the valid answer or timeout.                                                  
            nxd_dhcpv6_client.h                             Added support for the FQDN option, including defining FQDN settings and creating a new NX_DHCPV6_CLIENT_FQDN struct
                                                            Added declaration of nx_dhcpv6_get_valid_ip_address_prefix service API service.
                                                            Added declaration of nx_dhcpv6_get_time_server_address service API service.
                                                            Added nx_dhcp_seconds to the DHCP CLIENT struct.                                                            
                                                            Defined error status codes for server error handler op codes; NX_DHCPV6_ERROR_STATUS_CODE_IN_OPTION_FIELD,  
                                                            NX_DHCPV6_ERROR_STATUS_CODE_IN_IA_NA, and NX_DHCPV6_ERROR_STATUS_CODE_IN_IA_ADDRESS.
                                                            Added nx_dhcpv6_client_get_record and nx_dhcpv6_client_restore_record functions to realize the DHCPv6 Client restore feature.
                                                            Added _nx_dhcpv6_flush_queue_packets function to flush the useless queue packets.
                                                            Optimized DHCPv6 struct, removed nx_dhcpv6_valid_advertise_or_reply_flag.
            nxd_dhcpv6_server.c                             Fixed the compiler warnings     
                                                            Removed MULTI_HOME macro definition.
                                                            Used NetX Duo API to get the interface instead of directly getting the internal parameters.
                                                            Fixed the bug for physical address check.
                                                            
            nxd_dns.c                                       Added two new services, nx_dns_server_remove_all() which removes all DNS servers 
                                                            registered with the DNS Client, and nx_dns_info_by_name_get() which gets the
                                                            Service record associated with the specified host name.  These services sere
                                                            previously only available in NetX DNS Client. 
                                                            Fixed a bug in nxd_dns_response_process() that return error code if the packet 
                                                            does not contain the RR the application expects.
                                                            Fixed a bug in nx_dns_name_string_unencode() that return error code if the buffer
                                                            size can not store the all name string. 
                                                            Change the internal nxd_* function and nxd_* variables to nx_* function and nx_* variables.                                               
                                                            Added DNS CACHE feature.    
            nxd_dns.h                                       Added two new services, nx_dns_server_remove_all() and nx_dns_info_by_name_get().
                                                            Added DNS CACHE feature.           

            nxd_ftp_client.c                                Added _nx_ftp_client_connect_internal function and modified the _nxd_ftp_client_connect function.                                                    
                                                            Added '|' character as the delimiter type for EPRT. 
            nxd_ftp_client.h                                Added declaration for _nx_ftp_client_connect_internal function. 
            nxd_ftp_server.c                                Added support for packet chain                                       
                                                            Fixed complier warning
                                                            Added _nx_ftp_server_create_internal function and modified the _nx_ftp_server_create function. 
            nxd_ftp_server.h                                Added declaration for _nx_ftp_server_create_internal function.      

            nxd_http_client.c                               Fixed a bug that username and password might be NULL.
                                                            Added size check for nxe_http_client_create.
            nxd_http_client.h                               Added size check for nxe_http_client_create.
            nxd_http_server.c                               Fixed the logic in _nx_http_server_get_client_request to handle 
                                                            multipacket Get requests.                            
                                                            Added cache feature.
                                                            Supported user defined MIME maps.
                                                            Supported packet chain feature.
                                                            Supported multipart upload feature.
                                                            Unified response line.
                                                            Fixed compiler warnings.
                                                            Fixed memory leak when packet is chained.
                                                            Supported escape character.
                                                            Supported absolute URI.
                                                            Added separate input pointer to authenticate function if authentication is required. 
                                                            Return on internal error code.
                                                            Added size check for nxe_http_server_create.
                                                            Added timeouts for receive, accept, send and disconnect.
                                                            Defined values and structures for new features in nxd_http_server.c.
                                                            Added new services for new features in nxd_http_server.c.
                                                            Supported invalid user/password callback function.
            nxd_http_server.h                               Supported multipart upload feature.
                                                            Unified response line.
                                                            Supported to response date in header.
                                                            Removed declarations for _nxe version.
                                                            Added cache feature.
                                                            Supported user defined MIME maps.
                                                            Added new services for new features in nxd_http_server.c.
                                                            Added size check for nxe_http_server_create.
                                                            Added timeouts for receive, accept, send and disconnect.
                                                            Modified NX_HTTP_MAX_STRING to ensure room for encoded string. 

            nx_ppp.c                                        Modified logic in nx_ppp_packet_receive_get() to ensure that multipacket PPP messages cleave off
                                                            packets with junk data from the datagram (e.g. ppp crc computation and the 0x7e marker).
                                                            Modified logic in nx_ppp_lcp_configure_request() and nx_ppp_lcp_terminate_request_sent() to 
                                                            remove logic decementing the nx_ppp_protocol_retry_counter.  The logic is that the counter is
                                                            incremented up to NX_PPP_MAX_LCP_PROTOCOL_RETRIES, not down to zero. By decrementing the counter
                                                            effectively there was no limit to the retries in the LCP stage.
                                                            Removed unnecessary NX_PPP_IPCP_CONFIGURE_REQUEST case in the NX_PPP_IPCP_PEER_CONFIGURE_REQUEST_ACKED state
                                                            Added support for DNS request option configuration option.
                                                            Added support for LCP echo, both responding to echo requests and sending ping requests with the new service
                                                              nx_ppp_ping_request.                                                              
                                                            Modified the _nx_ppp_hash_generator, and all callers of this function to include a length arguement,
                                                            rather than assume the rand_value is null terminated (0x0 is a valid random octet).
                                                            Modified nx_ppp_delete to terminate the PPP thread before deleting it.                                                           
                                                            Fixed nx_ppp_pap_authenticate_nak not to set the PPP authenticated status to TRUE. 
                                                            Fixed nx_ppp_pap_login to only return TRUE or FALSE, not status, so that mismatched user/passwords will be detected.
                                                            Corrected the logic in nx_ppp_thread_entry() determining if the PPP should be set to authenticated.
                                                            Modified  _nx_ppp_lcp_state_machine_update() to accept LCP requests if already in the completed state (WIP).
                                                            Corrected logic in  _nx_ppp_pap_state_machine_update() setting the PPP PAP state if PAP authentication fails.       
            nx_ppp.h                                        Added DNS request option configuration option to disable the DNS request in IPCP messages.
                                                            Added support for LCP echo, both responding to echo requests and sending ping requests with the new service
                                                              nx_ppp_ping_request. 
                                                            Modified the _nx_ppp_hash_generator to include a length arguement,
                                                            rather than assume the rand_value is null terminated (0x0 is a valid random octet).   

            nxd_smtp_client.c                               Fixed error in invalid pointer check in _nxe_smtp_mail_send.
                                                            Fixed compiler error when IPv6 is disabled in _nxd_smtp_client_create.
                                                            Fixed bug checking for invalid pointers.
                                                            Fixed a typo in _nx_smtp_cmd_message.
                                                            Fixed case insensitive compare for challenge word.
                                                            Corrected 5.2 release date from 04-15-13 to 04-15-2013
            nxd_smtp_client.h                               Corrected 5.2 release date from 04-15-13 to 04-15-2013        

            nxd_snmp.c                                      Renamed API to be consistent with Express Logic names:
                                                              nx_snmp_agent_get_current_version to nx_snmp_agent_current_version_get
                                                              nx_snmp_agent_set_current_version to nx_snmp_agent_current_version_set
                                                              nx_snmp_agent_set_private_string to nx_snmp_agent_private_string_set
                                                              nx_snmp_agent_set_public_string to nx_snmp_agent_public_string_set
                                                              nx_snmp_agent_received_private_string to nx_snmp_agent_private_string_test
                                                            Simplified the logic in _nx_snmp_agent_private_string_test.
                                                            Used zero as terminal of string in _nx_snmp_agent_private_string_set
                                                              and _nx_snmp_agent_public_string_set.
                                                            Created nx_snmp_agent_public_string_set to set the SNMP Agent public string.
                                                            Created nx_snmp_agent_get_type_test to determine if an SNMP message received
                                                              is a GET or SET type.
                                                            Modified nx_snmp_version_1_process, nx_snmp_version_2_process and nx_snmp_version_3_process
                                                              to support the nx_snmp_agent_get_type_test service (save the request
                                                              type of the current received message).
                                                            Created nxd_snmp_agent_trapv2_oid_send and nxd_snmp_agent_trapv3_oid_send services.
            nxd_snmp.h                                      Renamed API to be consistent with Express Logic names:
                                                              nx_snmp_agent_get_current_version to nx_snmp_agent_current_version_get
                                                              nx_snmp_agent_set_version to nx_snmp_agent_version_set
                                                              nx_snmp_agent_set_private_string to nx_snmp_agent_private_string_set
                                                              nx_snmp_agent_set_public_string to nx_snmp_agent_public_string_set
                                                              nx_snmp_agent_received_private_string to nx_snmp_agent_private_string_test
                                                            Added new API nx_snmp_agent_public_string_set and nx_snmp_agent_request_get_type_test
                                                            Created nxd_snmp_agent_trapv2_oid_send and nxd_snmp_agent_trapv3_oid_send services.  

            nxd_sntp_client.c                               Fixed a bug in setting flags of request packet.
                                                            Fixed a compiler error when IPv6 is disabled.
                                                            Fixed compiler warnings.
                                                            Fixed a bug that dispersion check is disabled, the return
                                                              status should be success.
            nxd_sntp_client.h                               Fixed default value for packet size.
                                                            Fixed predefined value of current year and NTP time at 1999-01-01. 

            nxd_telnet_server.c                             Added support for option negotiation. The supported options are "ECHO" and "Suppress Go Ahead". 
                                                            Fixed a bug that connection end callback function was not invoked.
                                                            Added logic to handle a RST where the socket is already closed.
                                                            Added a callback to set remote echo (used by the NetX Duo SHELL Telnet driver).
            nxd_telnet_server.h                             Added support for option negotiation. The supported options are "ECHO" and "Suppress Go Ahead".  

            nxd_tftp_server.c                               Remove the MULTI_HOME macro definition. 
                                                            Added support for packet chaining.
            nxd_tftp_server.h                               Remove the MULTI_HOME macro definition.           
            nxd_tftp_client.c                               Fixed packet leaks in nx_tftp_client_file_read and nx_tftp_client_file_open.
                                                            Remove the MULTI_HOME macro definition.                                                   
                                                            Modified nx_tftp_client_file_write and nx_tftp_client_file_open (write request) to save server
                                                              error type and message to TFTP Client if an ACK is not received after data is sent.                                                   
                                                            Modified nx_tftp_client_file_read to fix bug parsing the server error type from the server 
                                                              if an error code is received.             


Release 5.4   11-23-2009

            nxd_dhcp_client.c                               Added logic to clear non specific DHCP broadcast packets from the DHCP Client
                                                            receive queue in nx_dhcp_thread_entry() and nx_dhcp_get_response(). This is enabled by
                                                            defining the NX_DHCP_CLIENT_CLEAR_QUEUE option in nx_dhcp.h. 
                                                            Made corrections to nx_dhcp_process for more accurate handling of retransmission
                                                            intervals in both the process of reaching the BOUND state and in the RENEW and REBIND
                                                            states.
                                                            Simplified the logic for extracting network parameters from the Server DHCP messages
                                                            between nx_dhcp_extract_information and nx_dhcp_process, in particular if the 
                                                            ARP probe is enabled. This also fixed a bug with using nx_dhcp_send_arp_probe of 
                                                            calling the state change notify function before the probe completed and the DHCP Client
                                                            properly promoted to the BOUND state. 
                                                            Simplified the logic in nx_dhcp_start and nx_dhcp_request_client_ip for setting the DHCP 
                                                            Client state with respect to the Client requesting a particular IP address.         
                                                            Modified nx_dhcp_get_response() to prevent invalid packet releases.
                                                            Removed the requirement for having the DHCP CLient to have a non zero interface IP address for using 
                                                            the option to skip the discovery step.                                                             
                                                            Modified nx_dhcp_process, nx_dhcp_release, nx_dhcp_decline and nx_dhcp_reinitialize to clear the DHCP
                                                            Client copy of network parameters (e.g. network mask, gateway) if the DHCP Client is clearing the 
                                                            interface IP address and gateway.
                                                            Made a correction to nx_dhcp_send_response_internal to always send DISCOVERY messages
                                                            as broadcast packets as per the RFC 2131.
                                                            Made a correction to nx_dhcp_send_response_internal to always send REQUEST messages
                                                            as broadcast packets if the DHCP Client is in the REBIND or REQUESTING state as per the RFC 2131.
                                                            Made corrections for creating and sending the INFORM_REQUEST message.                                                  
                                                            Created nx_dhcp_decline() to send DECLINE messages
                                                            Modified nx_dhcp_send_request() to disallow RELEASE and DECLINE messages.
                                                            Removed logic in nx_dhcp_client_arp_probe_send() setting IP network parameters.  Modified to only 
                                                            return status if the IP address is not in use.  
                                                            Modified nx_dhcp_release to set the start flag to false which is required to be able to restart the client with nx_dhcp_start().  
                                                            Modified nx_dhcp_delete() to unbind the socket before deleting. 
                                                            Modified nx_dhcp_delete() and nx_dhcp_create() to delete the DHCP Client packet pool only if the DHCP 
                                                            Client task created it. 
                                                            Modified nx_dhcp_option_retrieve() for an error in parsing the option buffer. 
                                                            Modified nx_dhcp_process() to sleep for the NX_DHCP_TIME_INTERVAL only if the 
                                                            DHCP client is at or beyond the bound state.
                                                            Modified nx_dhcp_process() to set the IP network address to zero if the ARP probe 
                                                            fails. This ensures the DHCP Client sends the subsequent DHCP messages out as broadcast
                                                            (not unicast).  
                                                            Modified nx_dhcp_process() to adjust the DHCP Client time remaining on its IP lease for 
                                                            the length of time of the ARP probe.
            nxd_dhcp_client.h                               Added nx_dhcp_decline to the list of DHCP Client API services
                                                            Modified nx_dhcp_client_arp_probe_send definition
                                                            Added internal flags to the DHCP CLient struct to simplify internal logic of the DHCP
                                                            Client processing messages from the Server.
            nxd_dhcp_server.c                               Replaced an array of CHAR pointers with a single CHAR array for the DHCP 
                                                            Server dhcp_name field.  Modified nx_dhcp_server_create() to copy the input 
                                                            name to the server dhcp_name field.


Release 5.3   08-03-2009
            nxd_bsd.c                                       nx_bsd_raw_filter_set - sets a function pointer to the BSD function that filters packets when raw
                                                               sockets are enabled in NetX Duo and NX_RAW_PACKET_FILTER_ENABLE is defined at NetX Duo
                                                               library build time.  Note that if there are multiple BSD raw sockets using the same protocol,
                                                               the behavior in NetX Duo is undefined. BSD sockets should copy received packets to all raw sockets
                                                               having the same protocol, but this is not implemented in BSD 5.3
                                                            nx_bsd_packet_receive- Retrieves packets enqueued on the BSD raw socket queue.
                                                            nx_bsd_raw_packet_info_extract - Extracts the raw packet sender and physical interface. 
                                                            nx_bsd_raw_receive_notify - This is the callback function NetX Duo uses when a raw packet has been received
                                                               and raw sockets are enabled in NetX Duo.                          
                                                            nx_bsd_raw_packet_filter - receives packets from NetX Duo if raw sockets are enabled and determines if 
                                                               BSD will consume the packet or let NetX Duo continue processing the packet e.g. hand off to TCP,
                                                               UDP, ICMP and other protocol handlers.
                                                            Modified functions
                                                               sendto - modified to send raw packets out the BSD socket if raw sockets are enabled.
                                                               recv - modified to receive raw packets if raw sockets enabled in NetX Duo
                                                               select - modified to receive raw packets if raw sockets enabled in NetX Duo
                                                               connect - modified to check for and disallow raw sockets to use this service 
                                                               send - modified to check for and disallow raw sockets to use this service
                                                               soc_close - modified for closing BSD sockets enabled for raw socket handling, including 
                                                                        manully clearing packet from the raw receive queue     
            nxd_bsd.h                                       Added the NX_BSD_PRINT_ERROR macro definition (disbaled by default0 for debug output
        
            nxd_dhcp_client.c                               Added  _nx_dhcp_server_address_get, for obtaining the DHCP server address and
                                                              _nx_dhcp_packet_pool_set to allow the host application to create the packet pool instead
                                                              of the default DHCP Client packet pool.  
                                                            Added critical section and mutex protection to the DHCPv6 Client                                                    
                                                            Modified nx_dhcp_get_response to add missing nx_packet_release calls to prevent packet leaks.
            nxd_dhcp_client.h                               Corrected the definition for NX_PACKET_ALLOCATE_TIMEOUT
                                                            Created a configuration option NX_DHCP_CLIENT_USER_CREATE_PACKET_POOL for the new feature for the 
                                                              host application to optionally create the DHCP Client packet pool  
            nxd_dhcp_server.c                               Renamed internal functions, error constants and definitions to avoid conflicts with the 
                                                            DHCP client.
            nxd_dhcp_server.h                               Renamed internal functions, error constants and definitions to avoid conflicts with the 
                                                            DHCP client.           
            nxd_dhcpv6_client.c                             Modified the DHCPv6 Client thread task to be stoppable at any time
                                                            Added nx_dhcpv6_stop and nx_dhcpv6_reinitialize for stopping and restarting the Client
                                                            Added nx_dhcpv6_register_IP_address for updating NetX Duo with the DHCPv6 Client assigned IP address
                                                            Modified DHCPv6 Client to remove IP address from the IP instance address table if an IP address is not reassigned
                                                            for example if rebind fails or host decides to release or decline an assigned address                                                    
                                                            Added critical section and mutex protection to the DHCPv6 Client
            nxd_dhcpv6_client.h                             Corrected the timer interval for the accrued lifetime entry function to use seconds, not ticks
                                                            Created a BOUND state and removed the FAILURE state (not useful); the BOUND state is a drop through
                                                            state in the DHCPv6 Client processing thread (does nothing)                                                            


Release 5.2   12-30-2007

            nx_auto_ip.c                                    Fixed a bug causing an infinate loop
                                                            Added support for NetX Duo (5.5 and later) to run over IPv4 when IPv6 is enabled.
            nx_auto_ip.h                                    Added support for NetX Duo (5.5 and later) to run over IPv4 when IPv6 is enabled.
            
            nxd_bsd.c                                       Fixed compile error caused by NX_BSD_ADDRESS_FAMILY_ERROR and NX_BSD_ERROR(NX_BSD_ERROR, __LINE__).
            nxd_bsd.h                                       NX_BSD_INHERIT_LISTENER_SOCKET_SETTINGS corrected to be enabled by default 
            
            nxd_dhcp_client.c                               First release of NetX Duo DHCP Client (branched from NetX DHCP Client)                                                         
                                                            Renamed the NetX Duo Client source code file from nx_dhpc.c to nxd_dhcp_client.c to specify the 
                                                            DHCP Client and to indicate that the DHCP Client will work properly in an IPv6 enabled NetX Duo 
                                                            environment.
            nxd_dhcp_client.h                               Renamed the NetX Duo Client header file from nx_dhpc.h to nxd_dhcp_client.h
            nxd_dhcp_server.c                               First release of NetX Duo DHCP Server (branched from NetX DHCP Server)  
                                                            Renamed the NetX Duo Server source code file from nx_dhpc_server.c to nxd_dhcp_server.c to 
                                                            indicate that the DHCP Server will work properly in an IPv6 enabled NetX Duo 
                                                            environment. 
            nxd_dhcp_server.h                               Renamed the NetX Duo Server header file from nx_dhpc_server.h to nxd_dhcp_server.h
            nxd_dhcpv6_client.c                             Fixed compile errors in the NetX duo 5.6 environment.
                                                            v5.1 patches:
                                                            Modified nx_dhcpv6_start() for DHCPv6 client hosts rebooting with a valid IP lease already assigned.
                                                            Modified nx_dhcpv6_client_create_duid() not to set the link local address. The host application must do this                                                            
                                                            Added support for multihoming and NetX Duo v5.5 and later.
            nxd_dhcpv6_client.h                             Fixed compile errors in the NetX duo 5.6 environment.
            
            nxd_ftp_client.c                                Moved data socket disconnect ahead of releasing the
                                                            port and removing from the listen queue, flush server 
                                                            FTP messages from previous open request before starting 
                                                            the current open file request, added an unnaccept call 
                                                            if the data socket accept call fails, disconnect data 
                                                            socket if an error occurs on the control socket ending 
                                                            the file open request, increment the data port in the 
                                                            event the FTP server puts the data socket in a timed wait,
                                                            fixed the source of the IPv6 address in the number to 
                                                            ascii converstion routine, flush server FTP messages 
                                                            from previous open request before starting the current
                                                            open file request, added an unnaccept call if the data 
                                                            socket accept call fails, disconnect data socket if an
                                                            error occurs on the control socket ending the file open 
                                                            request, increment the data port in the event the FTP 
                                                            server puts the data socket in a timed wait.
            nxd_ftp_client.h                                Added client data socket port to increment data port 
                                                            binding on successive connections.
            nxd_ftp_server.c                                Added a cast to the FTP server pointer, added a check for 
                                                            whether or not IPv6 is enabled in NetX Duo.
            nxd_ftp_server.h                                Added conditional IPv6 check for IPv6 specific 
                                                            function declarations.
                                                            
            nxd_http_server.c                               Created _nx_http_server_content_length_get_extended and                            
                                                              _nx_http_server_content_get_extended services which will accept 
                                                              empty (content-length = 0) PUT and POST requests. 
                                                            Corrected 411 error codes in HTTP server replies to 400 error codes
                                                              since 411 error code is when the HTTP server refuses to accept a
                                                              request without a defined content-length. HTTP 1.0 permits requests 
                                                              without Content-length but does not permit Content-length that does 
                                                              not match the message body. 
                                                              
            nx_ppp.c                                        Added logic in nx_ppp_ipcp_state_machine_update() to handle late configuration requests
                                                            after the other side has completed the IPCP handshake. 
                                                            Corrected the processing of the CHAP challenge 'name' in nx_ppp_chap_challenge_respond().
                                                            Fixed a corner case if packet payload size falls on a certain boundary such that the 7E marker
                                                            terminating PPP message overwrites the end of the packet payload boundary in nx_ppp_packet_receive_get(). 
                                                            Also fixed an error in checksum computation for the same packet payloads of the same size. 
                                                            Added packet chaining support                                                           
                                                            Modified nx_ppp_receive_packet_process to only call link up callback if PPP has just transitioned to 
                                                            IPCP complete state, not if it was already in that state. 
                                                            
            nxd_telnet_server.c                             Added support for activity timeout disconnect callback. When a connection times out
                                                            NetX Duo Telnet Server calls the disconnect callback. Previously, it simply
                                                            closed the connection silently.
                                                            Added a current open connection counter and new API 
                                                              nx_telnet_server_get_open_connection_count for retrieving the open conneciton count.
            nxd_telnet_server.h                             Added support for the new API nx_telnet_server_get_open_connection_count
            
            
Release 5.1   01-12-2012

        
            nxd_dhcpv6_server.c                             Modified the nx_dhcpv6_server_create function to include a stack size. Defaulted the 
                                                            DHCPv6 server IP address index to 1 instead of requiring the host application to use 
                                                            the nx_dhcpv6_server_set_interface (only necessary if using the non primary interface 
                                                            or global address not at index 1 in the IP address table). 
                                                            Renamed internal functions and #defines to avoid compile erros in projects including the DHCPv6 Client 
            nxd_dhcpv6_server.h                             Renamed internal functions and #defines to avoid compile erros in projects including the DHCPv6 Client
            
            nxd_http_client.h                               Created a separate header file for HTTP Client and HTTP Server
            nxd_http_server.h                               Created a separate header file for HTTP Client and HTTP Server 

            nxd_snmp.c                                      Added support for packet chaining
                                                            Moved nx_udp_socket_bind call from nx_snmp_agent_create to nx_snmp_agent_start
                                                              moved nx_udp_socket_unbind in nx_snmp_agent_stop. This prevent packets from
                                                              piling up on the receive queue before the SNMP agent thread can start processing them.
                                                            Corrected how SNMPv3 packets are encrypted by adding an extra sequence between the top level
                                                              PDU sequence and the engine ID. nx_snmp_version_3_process, nx_snmp_version_3_report_send
                                                              and nx_snmp_agent_encrypt_pdu modified accordingly.
                                                            Added trap security to provide authentication and encryption for trap messages. The keys for trap message processing
                                                              can take separate passwords than the keys for processing responses messages.
                                                            Added logic to handle empty strings in _nx_snmp_object_id_get
                                                            Modified nx_snmp_version_3_process and nx_snmp_version_3_discovery to fix bugs handling discovery requests.
                                                            Modified nx_snmp_version_3_process to fix bugs when authentication enabled.
                                                            Added support for negative INTEGER data types in _nx_snmp_utility_object_data_get
                                                            Added _nx_snmp_agent_v3_context_boots_get()
                                                            Added support for setting SNMP version at run time and creating private community strings:
                                                            Created nx_snmp_agent_get_current_version to determine the SNMP version of the most recent
                                                              SNMP manager packet sent to the agent.
                                                            Created nx_snmp_agent_set_version to set the enable/disable the SNMP agent for SNMPV1,
                                                              SNMPV2, and SNMPv3.  These run time settings are overridden by the #defines
                                                              (NX_SNMP_DISABLE_V1, NX_SNMP_DISABLE_V2,  and NX_SNMP_DISABLE_V3 ).  Enabling the SNMP
                                                              agent for SNMPv1 at run time has no effect if NX_SNMP_DISABLE_V3 is defined.
                                                            Created nx_snmp_agent_set_private_string to set the SNMP Agent private string. This enables
                                                              the agent to have public and private data, and if it will accept the SNMP manager
                                                              packet SET requests.
                                                            Created nx_snmp_agent_set_public_string to set the SNMP Agent public string. The default value
                                                              is "public".  Previously the NetX Duo SNMP Agent did not evaluate the community string
                                                              and as such allowed all SET requests and all data was considered public.
                                                            Created nx_snmp_agent_received_private_string to compare the community string
                                                              in the received SNMP packet with the Agent private string for a match.
                                                            Modified nx_snmp_agent_version_1_process and nx_snmp_agent_version_2_process to
                                                              send an error report if an unsupported object type is received.
                                                            Modified key use services to accept a null key pointer in the error handler; this allows the caller
                                                              to disable authentication or encryption at run time.
            nxd_snmp.h                                      Added new API nx_snmp_agent_get_current_version, nx_snmp_agent_set_version,
                                                              nx_snmp_agent_set_private_string, nx_snmp_agent_set_public_string, and
                                                              nx_snmp_agent_received_private_string

                                                            Modified the NX_SNMP_AGENT control block to support the new API/features.