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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 */
/** */
/** Address Resolution Protocol (ARP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ip.h"
#include "nx_arp.h"
/* Bring in externs for caller checking code. */
NX_CALLER_CHECKING_EXTERNS
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxe_arp_enable PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in the ARP enable function */
/* call. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* arp_cache_memory Start of ARP cache memory */
/* arp_cache_size Size in bytes of cache memory */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_arp_enable Actual ARP enable function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nxe_arp_enable(NX_IP *ip_ptr, VOID *arp_cache_memory, ULONG arp_cache_size)
{
#ifndef NX_DISABLE_IPV4
UINT status;
/* Check for invalid input pointers. */
if ((ip_ptr == NX_NULL) || (ip_ptr -> nx_ip_id != NX_IP_ID) || (arp_cache_memory == NX_NULL))
{
return(NX_PTR_ERROR);
}
/* Check to see if ARP is already enabled. */
if (ip_ptr -> nx_ip_arp_allocate)
{
return(NX_ALREADY_ENABLED);
}
/* Check for invalid ARP cache size. */
if (arp_cache_size < sizeof(NX_ARP))
{
return(NX_SIZE_ERROR);
}
/* Check for appropriate caller. */
NX_INIT_AND_THREADS_CALLER_CHECKING
/* Call actual ARP enable function. */
status = _nx_arp_enable(ip_ptr, arp_cache_memory, arp_cache_size);
/* Return completion status. */
return(status);
#else /* NX_DISABLE_IPV4 */
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(arp_cache_memory);
NX_PARAMETER_NOT_USED(arp_cache_size);
return(NX_NOT_SUPPORTED);
#endif /* !NX_DISABLE_IPV4 */
}
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