/************************************************************************
* RSTP library - Rapid Spanning Tree (802.1t, 802.1w)
* Copyright (C) 2001-2003 Optical Access
* Author: Alex Rozin
*
* This file is part of RSTP library.
*
* RSTP library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; version 2.1
*
* RSTP library 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 Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with RSTP library; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
**********************************************************************/
/* BPDU formats: 9.1 - 9.3, 17.28 */
#ifndef _STP_BPDU_H__
#define _STP_BPDU_H__
#define MIN_BPDU 7
#define BPDU_L_SAP 0x42
#define LLC_UI 0x03
#define BPDU_PROTOCOL_ID 0x0000
#define BPDU_VERSION_ID 0x00
#define BPDU_VERSION_RAPID_ID 0x02
#define BPDU_TOPO_CHANGE_TYPE 0x80
#define BPDU_CONFIG_TYPE 0x00
#define BPDU_RSTP 0x02
#define TOPOLOGY_CHANGE_BIT 0x01
#define PROPOSAL_BIT 0x02
#define PORT_ROLE_OFFS 2 /* 0x04 & 0x08 */
#define PORT_ROLE_MASK (0x03 << PORT_ROLE_OFFS)
#define LEARN_BIT 0x10
#define FORWARD_BIT 0x20
#define AGREEMENT_BIT 0x40
#define TOPOLOGY_CHANGE_ACK_BIT 0x80
#define RSTP_PORT_ROLE_UNKN 0x00
#define RSTP_PORT_ROLE_ALTBACK 0x01
#define RSTP_PORT_ROLE_ROOT 0x02
#define RSTP_PORT_ROLE_DESGN 0x03
typedef struct mac_header_t {
unsigned char dst_mac[6];
unsigned char src_mac[6];
} MAC_HEADER_T;
typedef struct eth_header_t {
unsigned char len8023[2];
unsigned char dsap;
unsigned char ssap;
unsigned char llc;
} ETH_HEADER_T;
typedef struct bpdu_header_t {
unsigned char protocol[2];
unsigned char version;
unsigned char bpdu_type;
} BPDU_HEADER_T;
typedef struct bpdu_body_t {
unsigned char flags;
unsigned char root_id[8];
unsigned char root_path_cost[4];
unsigned char bridge_id[8];
unsigned char port_id[2];
unsigned char message_age[2];
unsigned char max_age[2];
unsigned char hello_time[2];
unsigned char forward_delay[2];
} BPDU_BODY_T;
typedef struct stp_bpdu_t {
ETH_HEADER_T eth;
BPDU_HEADER_T hdr;
BPDU_BODY_T body;
unsigned char ver_1_len[2];
} BPDU_T;
#endif /* _STP_BPDU_H__ */