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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 */
/** */
/** Packet Pool Management (Packet) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_packet.h"
/* Bring in externs for caller checking code. */
NX_CALLER_CHECKING_EXTERNS
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxe_packet_data_append PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in the packet data append */
/* function call. */
/* */
/* INPUT */
/* */
/* packet_ptr Pointer to packet to append */
/* data_start Pointer to start of the data */
/* data_size Number of bytes to append */
/* pool_ptr Pool to allocate the packet */
/* wait_option Suspension option */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_packet_data_append Actual packet data append */
/* function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nxe_packet_data_append(NX_PACKET *packet_ptr, VOID *data_start, ULONG data_size,
NX_PACKET_POOL *pool_ptr, ULONG wait_option)
{
UINT status;
/* Check for invalid input pointers. */
if ((pool_ptr == NX_NULL) || (pool_ptr -> nx_packet_pool_id != NX_PACKET_POOL_ID) ||
(packet_ptr == NX_NULL) || (data_start == NX_NULL))
{
return(NX_PTR_ERROR);
}
/* Check for an invalid size of data to append. */
if (!data_size)
{
return(NX_SIZE_ERROR);
}
/* Check for an invalid packet prepend pointer. */
/*lint -e{946} suppress pointer subtraction, since it is necessary. */
if (packet_ptr -> nx_packet_prepend_ptr < packet_ptr -> nx_packet_data_start)
{
return(NX_UNDERFLOW);
}
/* Check for an invalid packet append pointer. */
/*lint -e{946} suppress pointer subtraction, since it is necessary. */
if (packet_ptr -> nx_packet_append_ptr > packet_ptr -> nx_packet_data_end)
{
return(NX_OVERFLOW);
}
/* Check for appropriate caller. */
NX_THREAD_WAIT_CALLER_CHECKING
/* Call actual packet data append function. */
status = _nx_packet_data_append(packet_ptr, data_start, data_size, pool_ptr, wait_option);
/* Return completion status. */
return(status);
}
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