1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.3 2000/12/17 23:07:50 guy Exp $ (LBL) */ 2 /* 3 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that: (1) source code distributions 8 * retain the above copyright notice and this paragraph in its entirety, (2) 9 * distributions including binary code include the above copyright notice and 10 * this paragraph in its entirety in the documentation or other materials 11 * provided with the distribution, and (3) all advertising materials mentioning 12 * features or use of this software display the following acknowledgement: 13 * ``This product includes software developed by the University of California, 14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 15 * the University nor the names of its contributors may be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 21 * 22 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu) 23 */ 24 #define OSPF_TYPE_UMD 0 /* UMd's special monitoring packets */ 25 #define OSPF_TYPE_HELLO 1 /* Hello */ 26 #define OSPF_TYPE_DB 2 /* Database Description */ 27 #define OSPF_TYPE_LSR 3 /* Link State Request */ 28 #define OSPF_TYPE_LSU 4 /* Link State Update */ 29 #define OSPF_TYPE_LSA 5 /* Link State Ack */ 30 #define OSPF_TYPE_MAX 6 31 32 /* Options *_options */ 33 #define OSPF_OPTION_T 0x01 /* T bit: TOS support */ 34 #define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */ 35 #define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */ 36 37 /* ospf_authtype */ 38 #define OSPF_AUTH_NONE 0 /* No auth-data */ 39 #define OSPF_AUTH_SIMPLE 1 /* Simple password */ 40 #define OSPF_AUTH_MD5 2 /* MD5 authentication */ 41 #define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */ 42 43 44 /* db_flags */ 45 #define OSPF_DB_INIT 0x04 /* */ 46 #define OSPF_DB_MORE 0x02 47 #define OSPF_DB_MASTER 0x01 48 49 /* ls_type */ 50 #define LS_TYPE_ROUTER 1 /* router link */ 51 #define LS_TYPE_NETWORK 2 /* network link */ 52 #define LS_TYPE_SUM_IP 3 /* summary link */ 53 #define LS_TYPE_SUM_ABR 4 /* summary area link */ 54 #define LS_TYPE_ASE 5 /* ASE */ 55 #define LS_TYPE_GROUP 6 /* Group membership (multicast */ 56 /* extensions 23 July 1991) */ 57 #define LS_TYPE_MAX 7 58 59 /************************************************* 60 * 61 * is the above a bug in the documentation? 62 * 63 *************************************************/ 64 65 66 /* rla_link.link_type */ 67 #define RLA_TYPE_ROUTER 1 /* point-to-point to another router */ 68 #define RLA_TYPE_TRANSIT 2 /* connection to transit network */ 69 #define RLA_TYPE_STUB 3 /* connection to stub network */ 70 #define RLA_TYPE_VIRTUAL 4 /* virtual link */ 71 72 /* rla_flags */ 73 #define RLA_FLAG_B 0x01 74 #define RLA_FLAG_E 0x02 75 #define RLA_FLAG_W1 0x04 76 #define RLA_FLAG_W2 0x08 77 78 /* sla_tosmetric breakdown */ 79 #define SLA_MASK_TOS 0x7f000000 80 #define SLA_MASK_METRIC 0x00ffffff 81 #define SLA_SHIFT_TOS 24 82 83 /* asla_tosmetric breakdown */ 84 #define ASLA_FLAG_EXTERNAL 0x80000000 85 #define ASLA_MASK_TOS 0x7f000000 86 #define ASLA_SHIFT_TOS 24 87 #define ASLA_MASK_METRIC 0x00ffffff 88 89 /* multicast vertex type */ 90 #define MCLA_VERTEX_ROUTER 1 91 #define MCLA_VERTEX_NETWORK 2 92 93 /* link state advertisement header */ 94 struct lsa_hdr { 95 u_int16_t ls_age; 96 u_int8_t ls_options; 97 u_int8_t ls_type; 98 struct in_addr ls_stateid; 99 struct in_addr ls_router; 100 u_int32_t ls_seq; 101 u_int16_t ls_chksum; 102 u_int16_t ls_length; 103 } ; 104 105 /* link state advertisement */ 106 struct lsa { 107 struct lsa_hdr ls_hdr; 108 109 /* Link state types */ 110 union { 111 /* Router links advertisements */ 112 struct { 113 u_int8_t rla_flags; 114 u_int8_t rla_zero[1]; 115 u_int16_t rla_count; 116 struct rlalink { 117 struct in_addr link_id; 118 struct in_addr link_data; 119 u_int8_t link_type; 120 u_int8_t link_toscount; 121 u_int16_t link_tos0metric; 122 } rla_link[1]; /* may repeat */ 123 } un_rla; 124 125 /* Network links advertisements */ 126 struct { 127 struct in_addr nla_mask; 128 struct in_addr nla_router[1]; /* may repeat */ 129 } un_nla; 130 131 /* Summary links advertisements */ 132 struct { 133 struct in_addr sla_mask; 134 u_int32_t sla_tosmetric[1]; /* may repeat */ 135 } un_sla; 136 137 /* AS external links advertisements */ 138 struct { 139 struct in_addr asla_mask; 140 struct aslametric { 141 u_int32_t asla_tosmetric; 142 struct in_addr asla_forward; 143 struct in_addr asla_tag; 144 } asla_metric[1]; /* may repeat */ 145 } un_asla; 146 147 /* Multicast group membership */ 148 struct mcla { 149 u_int32_t mcla_vtype; 150 struct in_addr mcla_vid; 151 } un_mcla[1]; 152 } lsa_un; 153 } ; 154 155 156 /* 157 * TOS metric struct (will be 0 or more in router links update) 158 */ 159 struct tos_metric { 160 u_int8_t tos_type; 161 u_int8_t tos_zero; 162 u_int16_t tos_metric; 163 } ; 164 165 #define OSPF_AUTH_SIZE 8 166 167 /* 168 * the main header 169 */ 170 struct ospfhdr { 171 u_int8_t ospf_version; 172 u_int8_t ospf_type; 173 u_int16_t ospf_len; 174 struct in_addr ospf_routerid; 175 struct in_addr ospf_areaid; 176 u_int16_t ospf_chksum; 177 u_int16_t ospf_authtype; 178 u_int8_t ospf_authdata[OSPF_AUTH_SIZE]; 179 union { 180 181 /* Hello packet */ 182 struct { 183 struct in_addr hello_mask; 184 u_int16_t hello_helloint; 185 u_int8_t hello_options; 186 u_int8_t hello_priority; 187 u_int32_t hello_deadint; 188 struct in_addr hello_dr; 189 struct in_addr hello_bdr; 190 struct in_addr hello_neighbor[1]; /* may repeat */ 191 } un_hello; 192 193 /* Database Description packet */ 194 struct { 195 u_int8_t db_zero[2]; 196 u_int8_t db_options; 197 u_int8_t db_flags; 198 u_int32_t db_seq; 199 struct lsa_hdr db_lshdr[1]; /* may repeat */ 200 } un_db; 201 202 /* Link State Request */ 203 struct lsr { 204 u_int32_t ls_type; 205 struct in_addr ls_stateid; 206 struct in_addr ls_router; 207 } un_lsr[1]; /* may repeat */ 208 209 /* Link State Update */ 210 struct { 211 u_int32_t lsu_count; 212 struct lsa lsu_lsa[1]; /* may repeat */ 213 } un_lsu; 214 215 /* Link State Acknowledgement */ 216 struct { 217 struct lsa_hdr lsa_lshdr[1]; /* may repeat */ 218 } un_lsa ; 219 } ospf_un ; 220 } ; 221 222 #define ospf_hello ospf_un.un_hello 223 #define ospf_db ospf_un.un_db 224 #define ospf_lsr ospf_un.un_lsr 225 #define ospf_lsu ospf_un.un_lsu 226 #define ospf_lsa ospf_un.un_lsa 227 228