1 /* 2 * Copyright (c) 1991, 1993, 1994, 1995, 1996 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 40 /* db_flags */ 41 #define OSPF_DB_INIT 0x04 /* */ 42 #define OSPF_DB_MORE 0x02 43 #define OSPF_DB_MASTER 0x01 44 45 /* ls_type */ 46 #define LS_TYPE_ROUTER 1 /* router link */ 47 #define LS_TYPE_NETWORK 2 /* network link */ 48 #define LS_TYPE_SUM_IP 3 /* summary link */ 49 #define LS_TYPE_SUM_ABR 4 /* summary area link */ 50 #define LS_TYPE_ASE 5 /* ASE */ 51 #define LS_TYPE_GROUP 6 /* Group membership (multicast */ 52 /* extensions 23 July 1991) */ 53 #define LS_TYPE_MAX 7 54 55 /************************************************* 56 * 57 * is the above a bug in the documentation? 58 * 59 *************************************************/ 60 61 62 /* rla_link.link_type */ 63 #define RLA_TYPE_ROUTER 1 /* point-to-point to another router */ 64 #define RLA_TYPE_TRANSIT 2 /* connection to transit network */ 65 #define RLA_TYPE_STUB 3 /* connection to stub network */ 66 #define RLA_TYPE_VIRTUAL 4 /* virtual link */ 67 68 /* rla_flags */ 69 #define RLA_FLAG_B 0x01 70 #define RLA_FLAG_E 0x02 71 #define RLA_FLAG_W1 0x04 72 #define RLA_FLAG_W2 0x08 73 74 /* sla_tosmetric breakdown */ 75 #define SLA_MASK_TOS 0x7f000000 76 #define SLA_MASK_METRIC 0x00ffffff 77 #define SLA_SHIFT_TOS 24 78 79 /* asla_tosmetric breakdown */ 80 #define ASLA_FLAG_EXTERNAL 0x80000000 81 #define ASLA_MASK_TOS 0x7f000000 82 #define ASLA_SHIFT_TOS 24 83 #define ASLA_MASK_METRIC 0x00ffffff 84 85 /* multicast vertex type */ 86 #define MCLA_VERTEX_ROUTER 1 87 #define MCLA_VERTEX_NETWORK 2 88 89 /* link state advertisement header */ 90 struct lsa_hdr { 91 u_short ls_age; 92 u_char ls_options; 93 u_char ls_type; 94 struct in_addr ls_stateid; 95 struct in_addr ls_router; 96 u_int32_t ls_seq; 97 u_short ls_chksum; 98 u_short ls_length; 99 } ; 100 101 /* link state advertisement */ 102 struct lsa { 103 struct lsa_hdr ls_hdr; 104 105 /* Link state types */ 106 union { 107 /* Router links advertisements */ 108 struct { 109 u_char rla_flags; 110 u_char rla_zero[1]; 111 u_short rla_count; 112 struct rlalink { 113 struct in_addr link_id; 114 struct in_addr link_data; 115 u_char link_type; 116 u_char link_toscount; 117 u_short link_tos0metric; 118 } rla_link[1]; /* may repeat */ 119 } un_rla; 120 121 /* Network links advertisements */ 122 struct { 123 struct in_addr nla_mask; 124 struct in_addr nla_router[1]; /* may repeat */ 125 } un_nla; 126 127 /* Summary links advertisements */ 128 struct { 129 struct in_addr sla_mask; 130 u_int32_t sla_tosmetric[1]; /* may repeat */ 131 } un_sla; 132 133 /* AS external links advertisements */ 134 struct { 135 struct in_addr asla_mask; 136 struct aslametric { 137 u_int32_t asla_tosmetric; 138 struct in_addr asla_forward; 139 struct in_addr asla_tag; 140 } asla_metric[1]; /* may repeat */ 141 } un_asla; 142 143 /* Multicast group membership */ 144 struct mcla { 145 u_int32_t mcla_vtype; 146 struct in_addr mcla_vid; 147 } un_mcla[1]; 148 } lsa_un; 149 } ; 150 151 152 /* 153 * TOS metric struct (will be 0 or more in router links update) 154 */ 155 struct tos_metric { 156 u_char tos_type; 157 u_char tos_zero; 158 u_short tos_metric; 159 } ; 160 161 #define OSPF_AUTH_SIZE 8 162 163 /* 164 * the main header 165 */ 166 struct ospfhdr { 167 u_char ospf_version; 168 u_char ospf_type; 169 u_short ospf_len; 170 struct in_addr ospf_routerid; 171 struct in_addr ospf_areaid; 172 u_short ospf_chksum; 173 u_short ospf_authtype; 174 u_char ospf_authdata[OSPF_AUTH_SIZE]; 175 union { 176 177 /* Hello packet */ 178 struct { 179 struct in_addr hello_mask; 180 u_short hello_helloint; 181 u_char hello_options; 182 u_char hello_priority; 183 u_int32_t hello_deadint; 184 struct in_addr hello_dr; 185 struct in_addr hello_bdr; 186 struct in_addr hello_neighbor[1]; /* may repeat */ 187 } un_hello; 188 189 /* Database Description packet */ 190 struct { 191 u_char db_zero[2]; 192 u_char db_options; 193 u_char db_flags; 194 u_int32_t db_seq; 195 struct lsa_hdr db_lshdr[1]; /* may repeat */ 196 } un_db; 197 198 /* Link State Request */ 199 struct lsr { 200 u_int32_t ls_type; 201 struct in_addr ls_stateid; 202 struct in_addr ls_router; 203 } un_lsr[1]; /* may repeat */ 204 205 /* Link State Update */ 206 struct { 207 u_int32_t lsu_count; 208 struct lsa lsu_lsa[1]; /* may repeat */ 209 } un_lsu; 210 211 /* Link State Acknowledgement */ 212 struct { 213 struct lsa_hdr lsa_lshdr[1]; /* may repeat */ 214 } un_lsa ; 215 } ospf_un ; 216 } ; 217 218 #define ospf_hello ospf_un.un_hello 219 #define ospf_db ospf_un.un_db 220 #define ospf_lsr ospf_un.un_lsr 221 #define ospf_lsu ospf_un.un_lsu 222 #define ospf_lsa ospf_un.un_lsa 223 224