projects / people / ms / rstp.git / blame
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|---|---|---|
| ad02a0eb SH |
1 | /************************************************************************ |
| 2 | * RSTP library - Rapid Spanning Tree (802.1t, 802.1w) | |
| 3 | * Copyright (C) 2001-2003 Optical Access | |
| 4 | * Author: Alex Rozin | |
| 5 | * | |
| 6 | * This file is part of RSTP library. | |
| 7 | * | |
| 8 | * RSTP library is free software; you can redistribute it and/or modify it | |
| 9 | * under the terms of the GNU Lesser General Public License as published by the | |
| 10 | * Free Software Foundation; version 2.1 | |
| 11 | * | |
| 12 | * RSTP library is distributed in the hope that it will be useful, but | |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser | |
| 15 | * General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public License | |
| 18 | * along with RSTP library; see the file COPYING. If not, write to the Free | |
| 19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
| 20 | * 02111-1307, USA. | |
| 21 | **********************************************************************/ | |
| 22 | ||
| 23 | /* BPDU formats: 9.1 - 9.3, 17.28 */ | |
| 24 | ||
| 25 | #ifndef _STP_BPDU_H__ | |
| 26 | #define _STP_BPDU_H__ | |
| 27 | ||
| 28 | #define MIN_BPDU 7 | |
| 29 | #define BPDU_L_SAP 0x42 | |
| 30 | #define LLC_UI 0x03 | |
| 31 | #define BPDU_PROTOCOL_ID 0x0000 | |
| 32 | #define BPDU_VERSION_ID 0x00 | |
| 33 | #define BPDU_VERSION_RAPID_ID 0x02 | |
| 34 | ||
| 35 | #define BPDU_TOPO_CHANGE_TYPE 0x80 | |
| 36 | #define BPDU_CONFIG_TYPE 0x00 | |
| 37 | #define BPDU_RSTP 0x02 | |
| 38 | ||
| 39 | #define TOLPLOGY_CHANGE_BIT 0x01 | |
| 40 | #define PROPOSAL_BIT 0x02 | |
| 41 | #define PORT_ROLE_OFFS 2 /* 0x04 & 0x08 */ | |
| 42 | #define PORT_ROLE_MASK (0x03 << PORT_ROLE_OFFS) | |
| 43 | #define LEARN_BIT 0x10 | |
| 44 | #define FORWARD_BIT 0x20 | |
| 45 | #define AGREEMENT_BIT 0x40 | |
| 46 | #define TOLPLOGY_CHANGE_ACK_BIT 0x80 | |
| 47 | ||
| 48 | #define RSTP_PORT_ROLE_UNKN 0x00 | |
| 49 | #define RSTP_PORT_ROLE_ALTBACK 0x01 | |
| 50 | #define RSTP_PORT_ROLE_ROOT 0x02 | |
| 51 | #define RSTP_PORT_ROLE_DESGN 0x03 | |
| 52 | ||
| 53 | typedef struct mac_header_t { | |
| 54 | unsigned char dst_mac[6]; | |
| 55 | unsigned char src_mac[6]; | |
| 56 | } MAC_HEADER_T; | |
| 57 | ||
| 58 | typedef struct eth_header_t { | |
| 59 | unsigned char len8023[2]; | |
| 60 | unsigned char dsap; | |
| 61 | unsigned char ssap; | |
| 62 | unsigned char llc; | |
| 63 | } ETH_HEADER_T; | |
| 64 | ||
| 65 | typedef struct bpdu_header_t { | |
| 66 | unsigned char protocol[2]; | |
| 67 | unsigned char version; | |
| 68 | unsigned char bpdu_type; | |
| 69 | } BPDU_HEADER_T; | |
| 70 | ||
| 71 | typedef struct bpdu_body_t { | |
| 72 | unsigned char flags; | |
| 73 | unsigned char root_id[8]; | |
| 74 | unsigned char root_path_cost[4]; | |
| 75 | unsigned char bridge_id[8]; | |
| 76 | unsigned char port_id[2]; | |
| 77 | unsigned char message_age[2]; | |
| 78 | unsigned char max_age[2]; | |
| 79 | unsigned char hello_time[2]; | |
| 80 | unsigned char forward_delay[2]; | |
| 81 | } BPDU_BODY_T; | |
| 82 | ||
| 83 | typedef struct stp_bpdu_t { | |
| 84 | ETH_HEADER_T eth; | |
| 85 | BPDU_HEADER_T hdr; | |
| 86 | BPDU_BODY_T body; | |
| 87 | unsigned char ver_1_len[2]; | |
| 88 | } BPDU_T; | |
| 89 | ||
| 90 | #endif /* _STP_BPDU_H__ */ | |
| 91 |