usr/src/lib/librstp/common/stp_bpdu.h

   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 TOPOLOGY_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 TOPOLOGY_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__ */