/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */ /**************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** NetX Component */ /** */ /** Internet Protocol (IP) */ /** */ /**************************************************************************/ /**************************************************************************/ #define NX_SOURCE_CODE /* Include necessary system files. */ #include "nx_api.h" #include "nx_ipv6.h" #ifdef FEATURE_NX_IPV6 #include "nx_nd_cache.h" #include "nx_icmpv6.h" #endif /* FEATURE_NX_IPV6 */ /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _nxd_ipv6_disable PORTABLE C */ /* 6.1 */ /* AUTHOR */ /* */ /* Yuxin Zhou, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function disables the IPv6 for the specified IP instance. */ /* */ /* INPUT */ /* */ /* ip_ptr IP instance pointer */ /* */ /* OUTPUT */ /* */ /* status Completion status */ /* NX_ALREADY_ENABLED IPv6 already enabled on IP */ /* NX_NOT_SUPPORTED IPv6 not supported on this IP */ /* */ /* CALLS */ /* */ /* _nx_ipv6_multicast_leave Leave the multicast group */ /* _nxd_ipv6_default_router_table_init Initialize IPv6 routing table */ /* _nx_nd_cache_delete_internal Delete ND Cache Entry */ /* tx_mutex_get Obtain a protection mutex */ /* tx_mutex_put Release protection mutex */ /* */ /* CALLED BY */ /* */ /* Application Code */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */ /* 09-30-2020 Yuxin Zhou Modified comment(s), */ /* resulting in version 6.1 */ /* */ /**************************************************************************/ UINT _nxd_ipv6_disable(NX_IP *ip_ptr) { #ifdef FEATURE_NX_IPV6 TX_INTERRUPT_SAVE_AREA ULONG address[4]; UINT i; /* Make sure IPv6 is not already enabled. */ /* Cast the function pointer into a ULONG. Since this is exactly what we wish to do, disable the lint warning with the following comment: */ /*lint -e{923} suppress cast of pointer to ULONG. */ if ((ALIGN_TYPE)ip_ptr -> nx_ipv6_packet_receive == NX_NULL) { return(NX_SUCCESS); } /* If trace is enabled, insert this event into the trace buffer. */ NX_TRACE_IN_LINE_INSERT(NX_TRACE_IPV6_DISABLE, ip_ptr, 0, 0, 0, NX_TRACE_IP_EVENTS, 0, 0); /* Obtain the IP mutex so we can manipulate the internal routing table. */ tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER); /* Disable Interrupt */ TX_DISABLE /* Install IPv6 packet receive processing function pointer */ ip_ptr -> nx_ipv6_packet_receive = NX_NULL; /* Enable Interrupt */ TX_RESTORE /* Zero out the IPv6 default router table */ _nxd_ipv6_default_router_table_init(ip_ptr); /* Clear IPv6 internal timers. */ ip_ptr -> nx_ipv6_reachable_timer = 0; ip_ptr -> nx_ipv6_retrans_timer_ticks = 0; /* Check if router solicitation is not disabled. */ #ifndef NX_DISABLE_ICMPV6_ROUTER_SOLICITATION /* Create the all-node multicast group address, */ address[0] = 0xFF020000; address[1] = 0; address[2] = 0; address[3] = 1; #endif /* NX_DISABLE_ICMPV6_ROUTER_SOLICITATION */ /* Reset the router solicitation values . */ for (i = 0; i < NX_MAX_PHYSICAL_INTERFACES; i++) { if (ip_ptr -> nx_ip_interface[i].nx_interface_valid == NX_TRUE) { ip_ptr -> nx_ip_interface[i].nxd_interface_ipv6_address_list_head = NX_NULL; #ifndef NX_DISABLE_ICMPV6_ROUTER_SOLICITATION ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_max = 0; ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_count = 0; ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_interval = 0; ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_timer = 0; /* Leave all-node multicast group. */ _nx_ipv6_multicast_leave(ip_ptr, address, &ip_ptr -> nx_ip_interface[i]); #endif /* NX_DISABLE_ICMPV6_ROUTER_SOLICITATION */ } } /* Remove the IPv6 addresses, and leave the corresponding multicast groups. */ for (i = 0; i < NX_MAX_IPV6_ADDRESSES; i++) { if (ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address_valid) { SET_SOLICITED_NODE_MULTICAST_ADDRESS(address, ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address); _nx_ipv6_multicast_leave(ip_ptr, &address[0], ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address_attached); } } /* Zero out the IPv6 address structure table. */ memset(&ip_ptr -> nx_ipv6_address[0], 0, sizeof(ip_ptr -> nx_ipv6_address)); /* Clean up the ND Cache table. */ if (ip_ptr -> nx_ip_icmpv6_packet_process) { for (i = 0; i < NX_IPV6_NEIGHBOR_CACHE_SIZE; i++) { if ((ip_ptr -> nx_ipv6_nd_cache[i].nx_nd_cache_nd_status != ND_CACHE_STATE_INVALID) && (ip_ptr -> nx_ipv6_nd_cache[i].nx_nd_cache_interface_ptr)) { _nx_nd_cache_delete_internal(ip_ptr, &ip_ptr -> nx_ipv6_nd_cache[i]); } } } /* Disable ND cache periodic update routine. */ ip_ptr -> nx_nd_cache_fast_periodic_update = NX_NULL; ip_ptr -> nx_nd_cache_slow_periodic_update = NX_NULL; /* Disable ICMPv6 services. */ ip_ptr -> nx_ip_icmpv6_packet_process = NX_NULL; #ifdef NX_ENABLE_IPV6_PATH_MTU_DISCOVERY ip_ptr -> nx_destination_table_periodic_update = NX_NULL; #endif /* NX_ENABLE_IPV6_PATH_MTU_DISCOVERY */ /* Clean up the loop back address. */ #ifndef NX_DISABLE_LOOPBACK_INTERFACE ip_ptr -> nx_ip_interface[NX_LOOPBACK_INTERFACE].nxd_interface_ipv6_address_list_head = NX_NULL; #endif /* NX_DISABLE_LOOPBACK_INTERFACE */ /* Release the IP protection. */ tx_mutex_put(&(ip_ptr -> nx_ip_protection)); /* Return successful completion. */ return(NX_SUCCESS); #else /* !FEATURE_NX_IPV6 */ NX_PARAMETER_NOT_USED(ip_ptr); return(NX_NOT_SUPPORTED); #endif /* FEATURE_NX_IPV6 */ }