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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 */
/** */
/** Neighbor Discovery Cache */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_nd_cache.h"
#ifdef FEATURE_NX_IPV6
#include "nx_ipv6.h"
#endif /* FEATURE_NX_IPV6 */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_nd_cache_entry_delete PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deletes an entry in the ND cache table. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP instance */
/* dest_ip Pointer to IP address to */
/* be deleted */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* _nx_nd_cache_delete_internal Actual function to add an */
/* entry to the cache. */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nxd_nd_cache_entry_delete(NX_IP *ip_ptr, ULONG *dest_ip)
{
#ifdef FEATURE_NX_IPV6
UINT status;
ND_CACHE_ENTRY *entry;
/* Obtain the protection. */
tx_mutex_get(&ip_ptr -> nx_ip_protection, TX_WAIT_FOREVER);
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NXD_TRACE_ND_CACHE_DELETE, dest_ip[3], 0, 0, 0, NX_TRACE_ARP_EVENTS, 0, 0);
/* If not found in the ND cache return an error status. */
if (_nx_nd_cache_find_entry(ip_ptr, dest_ip, &entry) != NX_SUCCESS)
{
/* Release the protection. */
tx_mutex_put(&ip_ptr -> nx_ip_protection);
return(NX_ENTRY_NOT_FOUND);
}
/*lint -e{644} suppress variable might not be initialized, since "entry" was initialized as long as previous call is NX_SUCCESS. */
status = _nx_nd_cache_delete_internal(ip_ptr, entry);
/* Release the protection. */
tx_mutex_put(&ip_ptr -> nx_ip_protection);
return(status);
#else /* !FEATURE_NX_IPV6 */
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(dest_ip);
return(NX_NOT_SUPPORTED);
#endif /* FEATURE_NX_IPV6 */
}
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