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