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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2025-present Eclipse ThreadX Contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** 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_transmit_queue_flush PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function releases all packets in the specified socket's */
/* transmit 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_socket_disconnect Socket disconnect processing */
/* */
/**************************************************************************/
VOID _nx_tcp_socket_transmit_queue_flush(NX_TCP_SOCKET *socket_ptr)
{
TX_INTERRUPT_SAVE_AREA
NX_PACKET *packet_ptr;
NX_PACKET *next_packet_ptr;
/* Setup packet pointer. */
packet_ptr = socket_ptr -> nx_tcp_socket_transmit_sent_head;
/* Clear the head and the tail pointers. */
socket_ptr -> nx_tcp_socket_transmit_sent_head = NX_NULL;
socket_ptr -> nx_tcp_socket_transmit_sent_tail = NX_NULL;
/* Loop to clear all the packets out. */
while (socket_ptr -> nx_tcp_socket_transmit_sent_count)
{
/* Disable interrupts. */
TX_DISABLE
/* Pickup the next queued packet. */
next_packet_ptr = packet_ptr -> nx_packet_union_next.nx_packet_tcp_queue_next;
/* Mark the packet as no longer being in a TCP queue. */
/*lint -e{923} suppress cast of ULONG to pointer. */
packet_ptr -> nx_packet_union_next.nx_packet_tcp_queue_next = (NX_PACKET *)NX_PACKET_ALLOCATED;
/* Has the packet been transmitted? */
/*lint -e{923} suppress cast of ULONG to pointer. */
if (packet_ptr -> nx_packet_queue_next == ((NX_PACKET *)NX_DRIVER_TX_DONE))
{
/* Yes, the driver has already released the packet. */
/* Restore interrupts. */
TX_RESTORE
/* Release the packet. */
_nx_packet_release(packet_ptr);
}
else
{
/* Just restore interrupts. */
TX_RESTORE
}
/* Move to the next packet. */
packet_ptr = next_packet_ptr;
/* Decrease the queued packet count. */
socket_ptr -> nx_tcp_socket_transmit_sent_count--;
}
}
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