lldp_misc.c File Reference

Helper functions for LLDP. More...

#include "core/net.h"
#include "lldp/lldp.h"
#include "lldp/lldp_fsm.h"
#include "lldp/lldp_misc.h"
#include "lldp/lldp_debug.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   LLDP_TRACE_LEVEL

Functions
void	lldpTick (LldpAgentContext *context)
	LLDP agent timer handler. More...
void	lldpProcessFrame (LldpAgentContext *context)
	Process incoming LLDP frame. More...
error_t	lldpCheckDataUnit (LldpPortEntry *port, LldpDataUnit *lldpdu)
	LLDP data unit validation. More...
LldpNeighborEntry *	lldpCreateNeighborEntry (LldpAgentContext *context)
	Create a new entry in the remote systems MIB. More...
LldpNeighborEntry *	lldpFindNeighborEntry (LldpAgentContext *context, LldpDataUnit *lldpdu)
	Search the remote systems MIB for a matching MSAP identifier. More...
void	lldpDeleteNeighborEntry (LldpNeighborEntry *entry)
	Remove an entry from the remote systems MIB. More...
bool_t	lldpGetLinkState (LldpAgentContext *context, uint_t portIndex)
	Get link state. More...
error_t	lldpAcceptMulticastAddr (LldpAgentContext *context)
	Add the LLDP multicast address to the static MAC table. More...
error_t	lldpDropMulticastAddr (LldpAgentContext *context)
	Remove the LLDP multicast address from the static MAC table. More...
void	lldpGeneratePortAddr (LldpPortEntry *port)
	Port's MAC address generation. More...
error_t	lldpGetMsapId (LldpDataUnit *lldpdu, LldpMsapId *msapId)
	Extract MSAP identifier. More...
bool_t	lldpCompareMsapId (const LldpMsapId *msapId1, const LldpMsapId *msapId2)
	Compare MSAP identifiers. More...
void	lldpSomethingChangedLocal (LldpAgentContext *context)
	Notify LLDP that an object in the LLDP local system MIB has changed. More...
void	lldpDecrementTimer (uint_t *x)
	Decrement timer value. More...

Variables
const MacAddr	LLDP_MULTICAST_ADDR = {{{0x01, 0x80, 0xC2, 0x00, 0x00, 0x0E}}}

Detailed Description

Helper functions for LLDP.

License

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

Copyright (C) 2010-2025 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.

Author

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

Version

2.5.4

Definition in file lldp_misc.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   LLDP_TRACE_LEVEL

Definition at line 32 of file lldp_misc.c.

Function Documentation

lldpAcceptMulticastAddr()

error_t lldpAcceptMulticastAddr

(

LldpAgentContext *

context

)

Add the LLDP multicast address to the static MAC table.

Parameters

[in]

context

Pointer to the LLDP agent context

Returns

Error code

Definition at line 580 of file lldp_misc.c.

lldpCheckDataUnit()

error_t lldpCheckDataUnit	(	LldpPortEntry *	port,
		LldpDataUnit *	lldpdu
	)

LLDP data unit validation.

Parameters

[in]	port	Pointer to the port context
[in]	lldpdu	Pointer to the received LLDP data unit

Returns

Error code

Definition at line 242 of file lldp_misc.c.

lldpCompareMsapId()

bool_t lldpCompareMsapId	(	const LldpMsapId *	msapId1,
		const LldpMsapId *	msapId2
	)

Compare MSAP identifiers.

Parameters

[in]	msapId1	Pointer to the first MSAP identifier
[in]	msapId2	Pointer to the second MSAP identifier

Returns

TRUE if the MSAP identifiers match, else FALSE

Definition at line 768 of file lldp_misc.c.

lldpCreateNeighborEntry()

LldpNeighborEntry* lldpCreateNeighborEntry

(

LldpAgentContext *

context

)

Create a new entry in the remote systems MIB.

Parameters

[in]

context

Pointer to the LLDP agent context

Returns

Pointer to the newly created entry

Definition at line 444 of file lldp_misc.c.

lldpDecrementTimer()

void lldpDecrementTimer

(

uint_t *

x

)

Decrement timer value.

Parameters

[in,out]

x

Actual timer value

Definition at line 825 of file lldp_misc.c.

lldpDeleteNeighborEntry()

void lldpDeleteNeighborEntry

(

LldpNeighborEntry *

entry

)

Remove an entry from the remote systems MIB.

Parameters

[in]

entry

Pointer to a given entry

Definition at line 528 of file lldp_misc.c.

lldpDropMulticastAddr()

error_t lldpDropMulticastAddr

(

LldpAgentContext *

context

)

Remove the LLDP multicast address from the static MAC table.

Parameters

[in]

context

Pointer to the LLDP agent context

Returns

Error code

Definition at line 635 of file lldp_misc.c.

lldpFindNeighborEntry()

LldpNeighborEntry* lldpFindNeighborEntry	(	LldpAgentContext *	context,
		LldpDataUnit *	lldpdu
	)

Search the remote systems MIB for a matching MSAP identifier.

Parameters

[in]	context	Pointer to the LLDP agent context
[in]	lldpdu	Pointer to the received LLDP data unit

Returns

Pointer to the matching entry, if any

Definition at line 476 of file lldp_misc.c.

lldpGeneratePortAddr()

void lldpGeneratePortAddr

(

LldpPortEntry *

port

)

Port's MAC address generation.

Parameters

[in]

port

Pointer to the port context

Definition at line 689 of file lldp_misc.c.

lldpGetLinkState()

bool_t lldpGetLinkState	(	LldpAgentContext *	context,
		uint_t	portIndex
	)

Get link state.

Parameters

[in]	context	Pointer to the LLDP agent context
[in]	portIndex	Port index

Returns

Error code

Definition at line 544 of file lldp_misc.c.

lldpGetMsapId()

error_t lldpGetMsapId	(	LldpDataUnit *	lldpdu,
		LldpMsapId *	msapId
	)

Extract MSAP identifier.

Parameters

[in]	lldpdu	Pointer to the LLDP data unit
[out]	msapId	MSAP identifier

Returns

Error code

Definition at line 740 of file lldp_misc.c.

lldpProcessFrame()

void lldpProcessFrame

(

LldpAgentContext *

context

)

Process incoming LLDP frame.

Parameters

[in]

context

Pointer to the LLDP agent context

Definition at line 170 of file lldp_misc.c.

lldpSomethingChangedLocal()

void lldpSomethingChangedLocal

(

LldpAgentContext *

context

)

Notify LLDP that an object in the LLDP local system MIB has changed.

Parameters

[in]

context

Pointer to the LLDP agent context

Definition at line 806 of file lldp_misc.c.

lldpTick()

void lldpTick

(

LldpAgentContext *

context

)

LLDP agent timer handler.

This routine must be periodically called by the TCP/IP stack to manage LLDP agent operation

Parameters

[in]

context

Pointer to the LLDP agent context

Definition at line 58 of file lldp_misc.c.

Variable Documentation

LLDP_MULTICAST_ADDR

const MacAddr LLDP_MULTICAST_ADDR = {{{0x01, 0x80, 0xC2, 0x00, 0x00, 0x0E}}}

Definition at line 46 of file lldp_misc.c.