stp_bpdu.h
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上传日期:2021-08-29
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- /************************************************************************
- * 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 TOLPLOGY_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 TOLPLOGY_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__ */