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/**************************************************************************/
/* */
/* 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_tcp.h"
#include "nx_ipv6.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_tcp_socket_block_cleanup PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function cleans up the transmission control block. */
/* */
/* INPUT */
/* */
/* socket_ptr Pointer to owning socket */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_tcp_fast_periodic_processing Process TCP packet for socket */
/* _nx_tcp_socket_connection_reset Reset TCP connection */
/* _nx_tcp_socket_disconnect Close TCP conenction */
/* _nx_tcp_socket_state_last_ack Process data on LAST ACK state*/
/* _nx_tcp_client_socket_unbind Ubind the TCP client socket */
/* */
/* 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_block_cleanup(NX_TCP_SOCKET *socket_ptr)
{
/* Clean up the connect IP address. */
socket_ptr -> nx_tcp_socket_connect_ip.nxd_ip_version = 0;
#ifdef FEATURE_NX_IPV6
/* Clean up the IP address field. */
SET_UNSPECIFIED_ADDRESS(socket_ptr -> nx_tcp_socket_connect_ip.nxd_ip_address.v6);
#else /* FEATURE_NX_IPV6 */
socket_ptr -> nx_tcp_socket_connect_ip.nxd_ip_address.v4 = 0;
#endif /* FEATURE_NX_IPV6 */
/* Clean up the connect port. */
socket_ptr -> nx_tcp_socket_connect_port = 0;
/* Reset zero window probe flag. */
socket_ptr -> nx_tcp_socket_zero_window_probe_has_data = NX_FALSE;
/* Simply clear the timeout. */
socket_ptr -> nx_tcp_socket_timeout = 0;
/* Reset duplicated ack received. */
socket_ptr -> nx_tcp_socket_duplicated_ack_received = 0;
/* Reset fast recovery stage. */
socket_ptr -> nx_tcp_socket_fast_recovery = NX_FALSE;
/* Connection needs to be closed down immediately. */
if (socket_ptr -> nx_tcp_socket_client_type)
{
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_INTERNAL_TCP_STATE_CHANGE, socket_ptr -> nx_tcp_socket_ip_ptr, socket_ptr, socket_ptr -> nx_tcp_socket_state, NX_TCP_CLOSED, NX_TRACE_INTERNAL_EVENTS, 0, 0);
/* Client socket, return to a CLOSED state. */
socket_ptr -> nx_tcp_socket_state = NX_TCP_CLOSED;
}
else
{
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_INTERNAL_TCP_STATE_CHANGE, socket_ptr -> nx_tcp_socket_ip_ptr, socket_ptr, socket_ptr -> nx_tcp_socket_state, NX_TCP_LISTEN_STATE, NX_TRACE_INTERNAL_EVENTS, 0, 0);
/* Server socket, return to LISTEN state. */
socket_ptr -> nx_tcp_socket_state = NX_TCP_LISTEN_STATE;
}
}