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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 */
/** */
/** Internet Protocol (IP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ip.h"
#include "nx_packet.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_ip_driver_deferred_receive PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function places the supplied packet on the driver's deferred */
/* receive queue. It will be processed later during subsequent */
/* execution of the IP helper thread by calling the driver's deferred */
/* handling routine. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* packet_ptr Raw receive packet */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Application Driver Receive ISR */
/* */
/**************************************************************************/
VOID _nx_ip_driver_deferred_receive(NX_IP *ip_ptr, NX_PACKET *packet_ptr)
{
#ifdef NX_DRIVER_DEFERRED_PROCESSING
TX_INTERRUPT_SAVE_AREA
/* Disable interrupts. */
TX_DISABLE
/* Add the packet to the end of the driver queue for processing */
packet_ptr -> nx_packet_queue_next = NX_NULL;
if (ip_ptr -> nx_ip_driver_deferred_packet_head == NX_NULL)
{
/* The queue is empty, set both the first and last packet
pointers to the new packet */
ip_ptr -> nx_ip_driver_deferred_packet_head = packet_ptr;
ip_ptr -> nx_ip_driver_deferred_packet_tail = packet_ptr;
/* Restore interrupts. */
TX_RESTORE
/* Wakeup IP helper thread to process the packet. */
tx_event_flags_set(&(ip_ptr -> nx_ip_events), NX_IP_DRIVER_PACKET_EVENT, TX_OR);
}
else
{
/* The queue is not empty, simply add the packet to the end of the queue. */
(ip_ptr -> nx_ip_driver_deferred_packet_tail) -> nx_packet_queue_next = packet_ptr;
ip_ptr -> nx_ip_driver_deferred_packet_tail = packet_ptr;
/* Restore interrupts. */
TX_RESTORE
}
#else
NX_PARAMETER_NOT_USED(ip_ptr);
/* No deferred packet processing, just release the packet. */
_nx_packet_release(packet_ptr);
#endif
}
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