1*4eaa4710SRishi Srivatsavai /************************************************************************ 2*4eaa4710SRishi Srivatsavai * RSTP library - Rapid Spanning Tree (802.1t, 802.1w) 3*4eaa4710SRishi Srivatsavai * Copyright (C) 2001-2003 Optical Access 4*4eaa4710SRishi Srivatsavai * Author: Alex Rozin 5*4eaa4710SRishi Srivatsavai * 6*4eaa4710SRishi Srivatsavai * This file is part of RSTP library. 7*4eaa4710SRishi Srivatsavai * 8*4eaa4710SRishi Srivatsavai * RSTP library is free software; you can redistribute it and/or modify it 9*4eaa4710SRishi Srivatsavai * under the terms of the GNU Lesser General Public License as published by the 10*4eaa4710SRishi Srivatsavai * Free Software Foundation; version 2.1 11*4eaa4710SRishi Srivatsavai * 12*4eaa4710SRishi Srivatsavai * RSTP library is distributed in the hope that it will be useful, but 13*4eaa4710SRishi Srivatsavai * WITHOUT ANY WARRANTY; without even the implied warranty of 14*4eaa4710SRishi Srivatsavai * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 15*4eaa4710SRishi Srivatsavai * General Public License for more details. 16*4eaa4710SRishi Srivatsavai * 17*4eaa4710SRishi Srivatsavai * You should have received a copy of the GNU Lesser General Public License 18*4eaa4710SRishi Srivatsavai * along with RSTP library; see the file COPYING. If not, write to the Free 19*4eaa4710SRishi Srivatsavai * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 20*4eaa4710SRishi Srivatsavai * 02111-1307, USA. 21*4eaa4710SRishi Srivatsavai **********************************************************************/ 22*4eaa4710SRishi Srivatsavai 23*4eaa4710SRishi Srivatsavai /* BPDU formats: 9.1 - 9.3, 17.28 */ 24*4eaa4710SRishi Srivatsavai 25*4eaa4710SRishi Srivatsavai #ifndef _STP_BPDU_H__ 26*4eaa4710SRishi Srivatsavai #define _STP_BPDU_H__ 27*4eaa4710SRishi Srivatsavai 28*4eaa4710SRishi Srivatsavai #define MIN_BPDU 7 29*4eaa4710SRishi Srivatsavai #define BPDU_L_SAP 0x42 30*4eaa4710SRishi Srivatsavai #define LLC_UI 0x03 31*4eaa4710SRishi Srivatsavai #define BPDU_PROTOCOL_ID 0x0000 32*4eaa4710SRishi Srivatsavai #define BPDU_VERSION_ID 0x00 33*4eaa4710SRishi Srivatsavai #define BPDU_VERSION_RAPID_ID 0x02 34*4eaa4710SRishi Srivatsavai 35*4eaa4710SRishi Srivatsavai #define BPDU_TOPO_CHANGE_TYPE 0x80 36*4eaa4710SRishi Srivatsavai #define BPDU_CONFIG_TYPE 0x00 37*4eaa4710SRishi Srivatsavai #define BPDU_RSTP 0x02 38*4eaa4710SRishi Srivatsavai 39*4eaa4710SRishi Srivatsavai #define TOPOLOGY_CHANGE_BIT 0x01 40*4eaa4710SRishi Srivatsavai #define PROPOSAL_BIT 0x02 41*4eaa4710SRishi Srivatsavai #define PORT_ROLE_OFFS 2 /* 0x04 & 0x08 */ 42*4eaa4710SRishi Srivatsavai #define PORT_ROLE_MASK (0x03 << PORT_ROLE_OFFS) 43*4eaa4710SRishi Srivatsavai #define LEARN_BIT 0x10 44*4eaa4710SRishi Srivatsavai #define FORWARD_BIT 0x20 45*4eaa4710SRishi Srivatsavai #define AGREEMENT_BIT 0x40 46*4eaa4710SRishi Srivatsavai #define TOPOLOGY_CHANGE_ACK_BIT 0x80 47*4eaa4710SRishi Srivatsavai 48*4eaa4710SRishi Srivatsavai #define RSTP_PORT_ROLE_UNKN 0x00 49*4eaa4710SRishi Srivatsavai #define RSTP_PORT_ROLE_ALTBACK 0x01 50*4eaa4710SRishi Srivatsavai #define RSTP_PORT_ROLE_ROOT 0x02 51*4eaa4710SRishi Srivatsavai #define RSTP_PORT_ROLE_DESGN 0x03 52*4eaa4710SRishi Srivatsavai 53*4eaa4710SRishi Srivatsavai typedef struct mac_header_t { 54*4eaa4710SRishi Srivatsavai unsigned char dst_mac[6]; 55*4eaa4710SRishi Srivatsavai unsigned char src_mac[6]; 56*4eaa4710SRishi Srivatsavai } MAC_HEADER_T; 57*4eaa4710SRishi Srivatsavai 58*4eaa4710SRishi Srivatsavai typedef struct eth_header_t { 59*4eaa4710SRishi Srivatsavai unsigned char len8023[2]; 60*4eaa4710SRishi Srivatsavai unsigned char dsap; 61*4eaa4710SRishi Srivatsavai unsigned char ssap; 62*4eaa4710SRishi Srivatsavai unsigned char llc; 63*4eaa4710SRishi Srivatsavai } ETH_HEADER_T; 64*4eaa4710SRishi Srivatsavai 65*4eaa4710SRishi Srivatsavai typedef struct bpdu_header_t { 66*4eaa4710SRishi Srivatsavai unsigned char protocol[2]; 67*4eaa4710SRishi Srivatsavai unsigned char version; 68*4eaa4710SRishi Srivatsavai unsigned char bpdu_type; 69*4eaa4710SRishi Srivatsavai } BPDU_HEADER_T; 70*4eaa4710SRishi Srivatsavai 71*4eaa4710SRishi Srivatsavai typedef struct bpdu_body_t { 72*4eaa4710SRishi Srivatsavai unsigned char flags; 73*4eaa4710SRishi Srivatsavai unsigned char root_id[8]; 74*4eaa4710SRishi Srivatsavai unsigned char root_path_cost[4]; 75*4eaa4710SRishi Srivatsavai unsigned char bridge_id[8]; 76*4eaa4710SRishi Srivatsavai unsigned char port_id[2]; 77*4eaa4710SRishi Srivatsavai unsigned char message_age[2]; 78*4eaa4710SRishi Srivatsavai unsigned char max_age[2]; 79*4eaa4710SRishi Srivatsavai unsigned char hello_time[2]; 80*4eaa4710SRishi Srivatsavai unsigned char forward_delay[2]; 81*4eaa4710SRishi Srivatsavai } BPDU_BODY_T; 82*4eaa4710SRishi Srivatsavai 83*4eaa4710SRishi Srivatsavai typedef struct stp_bpdu_t { 84*4eaa4710SRishi Srivatsavai ETH_HEADER_T eth; 85*4eaa4710SRishi Srivatsavai BPDU_HEADER_T hdr; 86*4eaa4710SRishi Srivatsavai BPDU_BODY_T body; 87*4eaa4710SRishi Srivatsavai unsigned char ver_1_len[2]; 88*4eaa4710SRishi Srivatsavai } BPDU_T; 89*4eaa4710SRishi Srivatsavai 90*4eaa4710SRishi Srivatsavai #endif /* _STP_BPDU_H__ */ 91