1 /* $OpenBSD: ospf.h,v 1.11 2019/04/14 00:37:31 dlg Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 * 23 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu) 24 */ 25 #define OSPF_TYPE_UMD 0 /* UMd's special monitoring packets */ 26 #define OSPF_TYPE_HELLO 1 /* Hello */ 27 #define OSPF_TYPE_DB 2 /* Database Description */ 28 #define OSPF_TYPE_LSR 3 /* Link State Request */ 29 #define OSPF_TYPE_LSU 4 /* Link State Update */ 30 #define OSPF_TYPE_LSA 5 /* Link State Ack */ 31 #define OSPF_TYPE_MAX 6 32 33 /* Options *_options */ 34 #define OSPF_OPTION_T 0x01 /* T bit: TOS support */ 35 #define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */ 36 #define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */ 37 38 /* ospf_authtype */ 39 #define OSPF_AUTH_NONE 0 /* No auth-data */ 40 #define OSPF_AUTH_SIMPLE 1 /* Simple password */ 41 #define OSPF_AUTH_MD5 2 /* MD5 authentication */ 42 #define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */ 43 44 45 /* db_flags */ 46 #define OSPF_DB_INIT 0x04 /* */ 47 #define OSPF_DB_MORE 0x02 48 #define OSPF_DB_MASTER 0x01 49 50 /* ls_type */ 51 #define LS_TYPE_ROUTER 1 /* router link */ 52 #define LS_TYPE_NETWORK 2 /* network link */ 53 #define LS_TYPE_SUM_IP 3 /* summary link */ 54 #define LS_TYPE_SUM_ABR 4 /* summary area link */ 55 #define LS_TYPE_ASE 5 /* ASE */ 56 #define LS_TYPE_GROUP 6 /* Group membership (multicast */ 57 /* extensions 23 July 1991) */ 58 #define LS_TYPE_MAX 7 59 60 /************************************************* 61 * 62 * is the above a bug in the documentation? 63 * 64 *************************************************/ 65 66 67 /* rla_link.link_type */ 68 #define RLA_TYPE_ROUTER 1 /* point-to-point to another router */ 69 #define RLA_TYPE_TRANSIT 2 /* connection to transit network */ 70 #define RLA_TYPE_STUB 3 /* connection to stub network */ 71 #define RLA_TYPE_VIRTUAL 4 /* virtual link */ 72 73 /* rla_flags */ 74 #define RLA_FLAG_B 0x01 75 #define RLA_FLAG_E 0x02 76 #define RLA_FLAG_W1 0x04 77 #define RLA_FLAG_W2 0x08 78 79 /* sla_tosmetric breakdown */ 80 #define SLA_MASK_TOS 0x7f000000 81 #define SLA_MASK_METRIC 0x00ffffff 82 #define SLA_SHIFT_TOS 24 83 84 /* asla_tosmetric breakdown */ 85 #define ASLA_FLAG_EXTERNAL 0x80000000 86 #define ASLA_MASK_TOS 0x7f000000 87 #define ASLA_SHIFT_TOS 24 88 #define ASLA_MASK_METRIC 0x00ffffff 89 90 /* multicast vertex type */ 91 #define MCLA_VERTEX_ROUTER 1 92 #define MCLA_VERTEX_NETWORK 2 93 94 /* link state advertisement header */ 95 struct lsa_hdr { 96 u_short ls_age; 97 u_char ls_options; 98 u_char ls_type; 99 struct in_addr ls_stateid; 100 struct in_addr ls_router; 101 u_int32_t ls_seq; 102 u_short ls_chksum; 103 u_short ls_length; 104 } ; 105 106 /* link state advertisement */ 107 struct lsa { 108 struct lsa_hdr ls_hdr; 109 110 /* Link state types */ 111 union { 112 /* Router links advertisements */ 113 struct { 114 u_char rla_flags; 115 u_char rla_zero[1]; 116 u_short rla_count; 117 struct rlalink { 118 struct in_addr link_id; 119 struct in_addr link_data; 120 u_char link_type; 121 u_char link_toscount; 122 u_short link_tos0metric; 123 } rla_link[1]; /* may repeat */ 124 } un_rla; 125 126 /* Network links advertisements */ 127 struct { 128 struct in_addr nla_mask; 129 struct in_addr nla_router[1]; /* may repeat */ 130 } un_nla; 131 132 /* Summary links advertisements */ 133 struct { 134 struct in_addr sla_mask; 135 u_int32_t sla_tosmetric[1]; /* may repeat */ 136 } un_sla; 137 138 /* AS external links advertisements */ 139 struct { 140 struct in_addr asla_mask; 141 struct aslametric { 142 u_int32_t asla_tosmetric; 143 struct in_addr asla_forward; 144 u_int32_t asla_tag; 145 } asla_metric[1]; /* may repeat */ 146 } un_asla; 147 148 /* Multicast group membership */ 149 struct mcla { 150 u_int32_t mcla_vtype; 151 struct in_addr mcla_vid; 152 } un_mcla[1]; 153 } lsa_un; 154 } ; 155 156 157 /* 158 * TOS metric struct (will be 0 or more in router links update) 159 */ 160 struct tos_metric { 161 u_char tos_type; 162 u_char tos_zero; 163 u_short tos_metric; 164 } ; 165 166 #define OSPF_AUTH_SIZE 8 167 168 /* 169 * the main header 170 */ 171 struct ospfhdr { 172 u_char ospf_version; 173 u_char ospf_type; 174 u_short ospf_len; 175 struct in_addr ospf_routerid; 176 struct in_addr ospf_areaid; 177 u_short ospf_chksum; 178 u_short ospf_authtype; 179 u_char ospf_authdata[OSPF_AUTH_SIZE]; 180 union { 181 182 /* Hello packet */ 183 struct { 184 struct in_addr hello_mask; 185 u_short hello_helloint; 186 u_char hello_options; 187 u_char hello_priority; 188 u_int32_t hello_deadint; 189 struct in_addr hello_dr; 190 struct in_addr hello_bdr; 191 struct in_addr hello_neighbor[1]; /* may repeat */ 192 } un_hello; 193 194 /* Database Description packet */ 195 struct { 196 u_int16_t db_mtu; 197 u_char db_options; 198 u_char db_flags; 199 u_int32_t db_seq; 200 struct lsa_hdr db_lshdr[1]; /* may repeat */ 201 } un_db; 202 203 /* Link State Request */ 204 struct lsr { 205 u_int32_t ls_type; 206 struct in_addr ls_stateid; 207 struct in_addr ls_router; 208 } un_lsr[1]; /* may repeat */ 209 210 /* Link State Update */ 211 struct { 212 u_int32_t lsu_count; 213 struct lsa lsu_lsa[1]; /* may repeat */ 214 } un_lsu; 215 216 /* Link State Acknowledgement */ 217 struct { 218 struct lsa_hdr lsa_lshdr[1]; /* may repeat */ 219 } un_lsa ; 220 } ospf_un ; 221 } ; 222 223 struct ospf_md5_authdata { 224 uint16_t auth_md5_offset; 225 uint8_t auth_keyid; 226 uint8_t auth_len; 227 uint32_t auth_seq; 228 }; 229 230 #define ospf_hello ospf_un.un_hello 231 #define ospf_db ospf_un.un_db 232 #define ospf_lsr ospf_un.un_lsr 233 #define ospf_lsu ospf_un.un_lsu 234 #define ospf_lsa ospf_un.un_lsa 235 236