/**************************************************************************/ /* */ /* 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 */ /** */ /** Transmission Control Protocol (TCP) */ /** */ /**************************************************************************/ /**************************************************************************/ #define NX_SOURCE_CODE /* Include necessary system files. */ #include "nx_api.h" #include "nx_ip.h" #include "nx_packet.h" #include "nx_tcp.h" /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _nx_tcp_socket_receive_queue_flush PORTABLE C */ /* 6.1 */ /* AUTHOR */ /* */ /* Yuxin Zhou, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function releases all packets in the specified socket's */ /* receive queue. */ /* */ /* INPUT */ /* */ /* socket_ptr Pointer to socket */ /* */ /* OUTPUT */ /* */ /* None */ /* */ /* CALLS */ /* */ /* _nx_packet_release Release a packet */ /* */ /* CALLED BY */ /* */ /* _nx_tcp_socket_connection_reset Socket connection reset */ /* processing */ /* _nx_tcp_server_socket_unaccept Server socket unaccept */ /* processing */ /* */ /* 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 */ /* */ /**************************************************************************/ VOID _nx_tcp_socket_receive_queue_flush(NX_TCP_SOCKET *socket_ptr) { NX_PACKET *packet_ptr; NX_PACKET *next_packet_ptr; /* Setup packet pointer. */ packet_ptr = socket_ptr -> nx_tcp_socket_receive_queue_head; /* Clear the head and the tail pointers. */ socket_ptr -> nx_tcp_socket_receive_queue_head = NX_NULL; socket_ptr -> nx_tcp_socket_receive_queue_tail = NX_NULL; /* Loop to clear all the packets out. */ while (socket_ptr -> nx_tcp_socket_receive_queue_count) { /* Pickup the next queued packet. */ next_packet_ptr = packet_ptr -> nx_packet_union_next.nx_packet_tcp_queue_next; /* Mark it as allocated so it will be released. */ /*lint -e{923} suppress cast of ULONT to pointer. */ packet_ptr -> nx_packet_union_next.nx_packet_tcp_queue_next = (NX_PACKET *)NX_PACKET_ALLOCATED; /* Release the packet. */ _nx_packet_release(packet_ptr); /* Move to the next packet. */ packet_ptr = next_packet_ptr; /* Decrease the queued packet count. */ socket_ptr -> nx_tcp_socket_receive_queue_count--; } }