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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 */
/** */
/** 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_copy PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in the packet copy */
/* function call. */
/* */
/* INPUT */
/* */
/* packet_ptr Pointer to source packet */
/* new_packet_ptr Pointer to return packet */
/* pool_ptr Pointer to packet pool to use */
/* for new packet(s) */
/* wait_option Suspension option */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_packet_copy Actual packet copy function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* 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 */
/* */
/**************************************************************************/
UINT _nxe_packet_copy(NX_PACKET *packet_ptr, NX_PACKET **new_packet_ptr,
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) || (new_packet_ptr == NX_NULL))
{
return(NX_PTR_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 copy function. */
status = _nx_packet_copy(packet_ptr, new_packet_ptr, pool_ptr, wait_option);
/* Return completion status. */
return(status);
}