4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/************************************************************************
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * RSTP library - Rapid Spanning Tree (802.1t, 802.1w)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Copyright (C) 2001-2003 Optical Access
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Author: Alex Rozin
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * This file is part of RSTP library.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * RSTP library is free software; you can redistribute it and/or modify it
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * under the terms of the GNU Lesser General Public License as published by the
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Free Software Foundation; version 2.1
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * RSTP library is distributed in the hope that it will be useful, but
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * WITHOUT ANY WARRANTY; without even the implied warranty of
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * General Public License for more details.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * You should have received a copy of the GNU Lesser General Public License
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * along with RSTP library; see the file COPYING. If not, write to the Free
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * 02111-1307, USA.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai **********************************************************************/
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/* BPDU formats: 9.1 - 9.3, 17.28 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifndef _STP_BPDU_H__
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define _STP_BPDU_H__
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define MIN_BPDU 7
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_L_SAP 0x42
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define LLC_UI 0x03
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_PROTOCOL_ID 0x0000
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_VERSION_ID 0x00
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_VERSION_RAPID_ID 0x02
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_TOPO_CHANGE_TYPE 0x80
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_CONFIG_TYPE 0x00
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define BPDU_RSTP 0x02
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define TOPOLOGY_CHANGE_BIT 0x01
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define PROPOSAL_BIT 0x02
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define PORT_ROLE_OFFS 2 /* 0x04 & 0x08 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define PORT_ROLE_MASK (0x03 << PORT_ROLE_OFFS)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define LEARN_BIT 0x10
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define FORWARD_BIT 0x20
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define AGREEMENT_BIT 0x40
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define TOPOLOGY_CHANGE_ACK_BIT 0x80
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define RSTP_PORT_ROLE_UNKN 0x00
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define RSTP_PORT_ROLE_ALTBACK 0x01
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define RSTP_PORT_ROLE_ROOT 0x02
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define RSTP_PORT_ROLE_DESGN 0x03
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaitypedef struct mac_header_t {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char dst_mac[6];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char src_mac[6];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai} MAC_HEADER_T;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaitypedef struct eth_header_t {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char len8023[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char dsap;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char ssap;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char llc;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai} ETH_HEADER_T;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaitypedef struct bpdu_header_t {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char protocol[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char version;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char bpdu_type;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai} BPDU_HEADER_T;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaitypedef struct bpdu_body_t {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char flags;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char root_id[8];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char root_path_cost[4];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char bridge_id[8];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char port_id[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char message_age[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char max_age[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char hello_time[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char forward_delay[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai} BPDU_BODY_T;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaitypedef struct stp_bpdu_t {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai ETH_HEADER_T eth;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai BPDU_HEADER_T hdr;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai BPDU_BODY_T body;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai unsigned char ver_1_len[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai} BPDU_T;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif /* _STP_BPDU_H__ */