arp_cache.c File Reference

ARP cache management. More...

#include "core/net.h"
#include "ipv4/arp_cache.h"
#include "ipv4/ipv4_misc.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   ARP_TRACE_LEVEL

Functions
void	arpChangeState (ArpCacheEntry *entry, ArpState newState)
	Update ARP cache entry state. More...
ArpCacheEntry *	arpCreateEntry (NetInterface *interface)
	Create a new entry in the ARP cache. More...
ArpCacheEntry *	arpFindEntry (NetInterface *interface, Ipv4Addr ipAddr)
	Search the ARP cache for a given IPv4 address. More...
void	arpFlushCache (NetInterface *interface)
	Flush ARP cache. More...
void	arpSendQueuedPackets (NetInterface *interface, ArpCacheEntry *entry)
	Send packets that are waiting for address resolution. More...
void	arpFlushQueuedPackets (NetInterface *interface, ArpCacheEntry *entry)
	Flush packet queue. More...

Detailed Description

ARP cache management.

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneTCP Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Description

Address Resolution Protocol is used to determine the hardware address of a specific host when only its IPv4 address is known. Refer to RFC 826

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.4.0

Definition in file arp_cache.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   ARP_TRACE_LEVEL

Definition at line 37 of file arp_cache.c.

Function Documentation

arpChangeState()

void arpChangeState	(	ArpCacheEntry *	entry,
		ArpState	newState
	)

Update ARP cache entry state.

Parameters

[in]	entry	Pointer to a ARP cache entry
[in]	newState	New state to switch to

Definition at line 55 of file arp_cache.c.

arpCreateEntry()

ArpCacheEntry* arpCreateEntry

(

NetInterface *

interface

)

Create a new entry in the ARP cache.

Parameters

[in]

interface

Underlying network interface

Returns

Pointer to the newly created entry

Definition at line 74 of file arp_cache.c.

arpFindEntry()

ArpCacheEntry* arpFindEntry	(	NetInterface *	interface,
		Ipv4Addr	ipAddr
	)

Search the ARP cache for a given IPv4 address.

Parameters

[in]	interface	Underlying network interface
[in]	ipAddr	IPv4 address

Returns

A pointer to the matching ARP entry is returned. NULL is returned if the specified IPv4 address could not be found in ARP cache

Definition at line 156 of file arp_cache.c.

arpFlushCache()

void arpFlushCache

(

NetInterface *

interface

)

Flush ARP cache.

Parameters

[in]

interface

Underlying network interface

Definition at line 188 of file arp_cache.c.

arpFlushQueuedPackets()

void arpFlushQueuedPackets	(	NetInterface *	interface,
		ArpCacheEntry *	entry
	)

Flush packet queue.

Parameters

[in]	interface	Underlying network interface
[in]	entry	Pointer to a ARP cache entry

Definition at line 262 of file arp_cache.c.

arpSendQueuedPackets()

void arpSendQueuedPackets	(	NetInterface *	interface,
		ArpCacheEntry *	entry
	)

Send packets that are waiting for address resolution.

Parameters

[in]	interface	Underlying network interface
[in]	entry	Pointer to a ARP cache entry

Definition at line 222 of file arp_cache.c.