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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_arp.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_arp_dynamic_entries_invalidate PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function invalidates all ARP dynamic entries currently in */
/* the ARP cache. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* _nx_arp_dynamic_entry_delete Delete dynamic ARP entry */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nx_arp_dynamic_entries_invalidate(NX_IP *ip_ptr)
{
#ifndef NX_DISABLE_IPV4
NX_ARP *arp_entry;
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_ARP_DYNAMIC_ENTRIES_INVALIDATE, ip_ptr, ip_ptr -> nx_ip_arp_dynamic_active_count, 0, 0, NX_TRACE_ARP_EVENTS, 0, 0);
/* Obtain protection on this IP instance for access into the ARP dynamic
list. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Setup pointers to the starting and ending ARP entries in the dynamic list. */
arp_entry = ip_ptr -> nx_ip_arp_dynamic_list;
/* Walk through the dynamic ARP list until there are no more active entries. */
while ((arp_entry) && (ip_ptr -> nx_ip_arp_dynamic_active_count))
{
/* Remove from the dynamic list. */
_nx_arp_dynamic_entry_delete(ip_ptr, arp_entry);
/* Cleanup the nx_arp_ip_interface field. */
arp_entry -> nx_arp_ip_interface = NX_NULL;
/* Determine if we are at the end of the dynamic list. */
if (arp_entry -> nx_arp_pool_next != ip_ptr -> nx_ip_arp_dynamic_list)
{
/* No, simply move to the next dynamic entry. */
arp_entry = arp_entry -> nx_arp_pool_next;
}
else
{
/* Yes, we are at the end of the dynamic list, break out of the loop. */
break;
}
}
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Return successful status to the caller. */
return(NX_SUCCESS);
#else /* NX_DISABLE_IPV4 */
NX_PARAMETER_NOT_USED(ip_ptr);
return(NX_NOT_SUPPORTED);
#endif /* !NX_DISABLE_IPV4 */
}
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