stp_bpdu.h File Reference

BPDU processing. More...

#include "stp/stp.h"

Go to the source code of this file.

Macros
#define	STP_TCN_BPDU_SIZE   4
#define	STP_CONFIG_BPDU_SIZE   35
#define	STP_PORT_PRIORITY_MASK   0xFF00
#define	STP_PORT_NUM_MASK   0x00FF

Enumerations
enum	StpBpduTypes { STP_BPDU_TYPE_CONFIG = 0x00, STP_BPDU_TYPE_TCN = 0x80 }
	BPDU types. More...
enum	StpBpduFlags { STP_BPDU_FLAG_TC = 0x01, STP_BPDU_FLAG_TC_ACK = 0x80 }
	BPDU flags. More...

Functions
void	stpProcessLlcFrame (NetInterface *interface, EthHeader *ethHeader, const uint8_t *data, size_t length, NetRxAncillary *ancillary, void *param)
	Process incoming LLC frame. More...
error_t	stpProcessBpdu (StpBridgePort *port, const StpBpdu *bpdu, size_t length)
	Process incoming bridge protocol data unit. More...
error_t	stpSendBpdu (StpBridgePort *port, const StpBpdu *bpdu, size_t length)
	Send bridge protocol data unit. More...
error_t	stpDumpBpdu (const StpBpdu *bpdu, size_t length)
	Dump BPDU for debugging purpose. More...
void	stpDumpFlags (uint8_t flags)
	Dump Flags field for debugging purpose. More...

Variables
typedef	__packed_struct
	Spanning Tree BPDU. More...
uint8_t	protocolVersionId
uint8_t	bpduType
uint8_t	flags
StpBridgeId	rootId
uint32_t	rootPathCost
StpBridgeId	bridgeId
uint16_t	portId
uint16_t	messageAge
uint16_t	maxAge
uint16_t	helloTime
uint16_t	forwardDelay
	StpBpdu
const MacAddr	STP_BRIDGE_GROUP_ADDR

Detailed Description

BPDU processing.

License

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

Copyright (C) 2019-2024 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneSTP 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

2.4.4

Definition in file stp_bpdu.h.

Macro Definition Documentation

STP_CONFIG_BPDU_SIZE

#define STP_CONFIG_BPDU_SIZE   35

Definition at line 39 of file stp_bpdu.h.

STP_PORT_NUM_MASK

#define STP_PORT_NUM_MASK   0x00FF

Definition at line 43 of file stp_bpdu.h.

STP_PORT_PRIORITY_MASK

#define STP_PORT_PRIORITY_MASK   0xFF00

Definition at line 42 of file stp_bpdu.h.

STP_TCN_BPDU_SIZE

#define STP_TCN_BPDU_SIZE   4

Definition at line 38 of file stp_bpdu.h.

Enumeration Type Documentation

StpBpduFlags

enum StpBpduFlags

BPDU flags.

Enumerator
STP_BPDU_FLAG_TC
STP_BPDU_FLAG_TC_ACK

Definition at line 66 of file stp_bpdu.h.

StpBpduTypes

enum StpBpduTypes

BPDU types.

Enumerator
STP_BPDU_TYPE_CONFIG
STP_BPDU_TYPE_TCN

Definition at line 55 of file stp_bpdu.h.

Function Documentation

stpDumpBpdu()

error_t stpDumpBpdu	(	const StpBpdu *	bpdu,
		size_t	length
	)

Dump BPDU for debugging purpose.

Parameters

[in]	bpdu	Pointer to the BPDU to dump
[in]	length	Length of the BPDU, in bytes

Returns

Error code

Definition at line 267 of file stp_bpdu.c.

stpDumpFlags()

void stpDumpFlags

(

uint8_t

flags

)

Dump Flags field for debugging purpose.

Parameters

[in]

flags

Value of the Flags field

Definition at line 337 of file stp_bpdu.c.

stpProcessBpdu()

error_t stpProcessBpdu	(	StpBridgePort *	port,
		const StpBpdu *	bpdu,
		size_t	length
	)

Process incoming bridge protocol data unit.

Parameters

[in]	port	Pointer to the bridge port context
[in]	bpdu	Pointer to the received BPDU
[in]	length	Length of the BPDU, in bytes

Returns

Error code

Definition at line 130 of file stp_bpdu.c.

stpProcessLlcFrame()

void stpProcessLlcFrame	(	NetInterface *	interface,
		EthHeader *	ethHeader,
		const uint8_t *	data,
		size_t	length,
		NetRxAncillary *	ancillary,
		void *	param
	)

Process incoming LLC frame.

Parameters

[in]	interface	Underlying network interface
[in]	ethHeader	Pointer to the Ethernet header
[in]	data	Pointer to the LLC frame
[in]	length	Length of the LLC frame, in bytes
[in]	ancillary	Additional options passed to the stack along with the packet
[in]	param	Pointer to the STP bridge context

Definition at line 72 of file stp_bpdu.c.

stpSendBpdu()

error_t stpSendBpdu	(	StpBridgePort *	port,
		const StpBpdu *	bpdu,
		size_t	length
	)

Send bridge protocol data unit.

Parameters

[in]	port	Pointer to the bridge port context
[in]	bpdu	Pointer to the BPDU to be transmitted
[in]	length	Length of the BPDU, in bytes

Returns

Error code

Definition at line 186 of file stp_bpdu.c.

Variable Documentation

__packed_struct

typedef __packed_struct

Initial value:

{
   uint16_t protocolId

Spanning Tree BPDU.

Definition at line 85 of file stp_bpdu.h.

bpduType

uint8_t bpduType

Definition at line 89 of file stp_bpdu.h.

bridgeId

StpBridgeId bridgeId

Definition at line 93 of file stp_bpdu.h.

flags

uint8_t flags

Definition at line 90 of file stp_bpdu.h.

forwardDelay

uint16_t forwardDelay

Definition at line 98 of file stp_bpdu.h.

helloTime

uint16_t helloTime

Definition at line 97 of file stp_bpdu.h.

maxAge

uint16_t maxAge

Definition at line 96 of file stp_bpdu.h.

messageAge

uint16_t messageAge

Definition at line 95 of file stp_bpdu.h.

portId

uint16_t portId

Definition at line 94 of file stp_bpdu.h.

protocolVersionId

uint8_t protocolVersionId

Definition at line 88 of file stp_bpdu.h.

rootId

StpBridgeId rootId

Definition at line 91 of file stp_bpdu.h.

rootPathCost

uint32_t rootPathCost

Definition at line 92 of file stp_bpdu.h.

STP_BRIDGE_GROUP_ADDR

const MacAddr STP_BRIDGE_GROUP_ADDR

extern

Definition at line 45 of file stp_bpdu.c.

StpBpdu

StpBpdu

Definition at line 99 of file stp_bpdu.h.