227 lines
6.2 KiB
C
227 lines
6.2 KiB
C
/*
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* Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
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*/
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#define OSPF_TYPE_UMD 0 /* UMd's special monitoring packets */
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#define OSPF_TYPE_HELLO 1 /* Hello */
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#define OSPF_TYPE_DB 2 /* Database Description */
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#define OSPF_TYPE_LSR 3 /* Link State Request */
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#define OSPF_TYPE_LSU 4 /* Link State Update */
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#define OSPF_TYPE_LSA 5 /* Link State Ack */
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#define OSPF_TYPE_MAX 6
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/* Options *_options */
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#define OSPF_OPTION_T 0x01 /* T bit: TOS support */
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#define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */
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#define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */
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/* ospf_authtype */
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#define OSPF_AUTH_NONE 0 /* No auth-data */
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#define OSPF_AUTH_SIMPLE 1 /* Simple password */
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#define OSPF_AUTH_MD5 2 /* MD5 authentication */
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#define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */
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/* db_flags */
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#define OSPF_DB_INIT 0x04 /* */
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#define OSPF_DB_MORE 0x02
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#define OSPF_DB_MASTER 0x01
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/* ls_type */
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#define LS_TYPE_ROUTER 1 /* router link */
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#define LS_TYPE_NETWORK 2 /* network link */
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#define LS_TYPE_SUM_IP 3 /* summary link */
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#define LS_TYPE_SUM_ABR 4 /* summary area link */
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#define LS_TYPE_ASE 5 /* ASE */
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#define LS_TYPE_GROUP 6 /* Group membership (multicast */
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/* extensions 23 July 1991) */
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#define LS_TYPE_MAX 7
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/*************************************************
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*
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* is the above a bug in the documentation?
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*
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*************************************************/
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/* rla_link.link_type */
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#define RLA_TYPE_ROUTER 1 /* point-to-point to another router */
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#define RLA_TYPE_TRANSIT 2 /* connection to transit network */
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#define RLA_TYPE_STUB 3 /* connection to stub network */
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#define RLA_TYPE_VIRTUAL 4 /* virtual link */
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/* rla_flags */
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#define RLA_FLAG_B 0x01
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#define RLA_FLAG_E 0x02
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#define RLA_FLAG_W1 0x04
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#define RLA_FLAG_W2 0x08
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/* sla_tosmetric breakdown */
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#define SLA_MASK_TOS 0x7f000000
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#define SLA_MASK_METRIC 0x00ffffff
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#define SLA_SHIFT_TOS 24
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/* asla_tosmetric breakdown */
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#define ASLA_FLAG_EXTERNAL 0x80000000
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#define ASLA_MASK_TOS 0x7f000000
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#define ASLA_SHIFT_TOS 24
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#define ASLA_MASK_METRIC 0x00ffffff
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/* multicast vertex type */
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#define MCLA_VERTEX_ROUTER 1
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#define MCLA_VERTEX_NETWORK 2
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/* link state advertisement header */
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struct lsa_hdr {
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u_short ls_age;
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u_char ls_options;
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u_char ls_type;
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struct in_addr ls_stateid;
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struct in_addr ls_router;
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u_int32_t ls_seq;
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u_short ls_chksum;
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u_short ls_length;
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} ;
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/* link state advertisement */
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struct lsa {
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struct lsa_hdr ls_hdr;
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/* Link state types */
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union {
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/* Router links advertisements */
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struct {
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u_char rla_flags;
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u_char rla_zero[1];
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u_short rla_count;
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struct rlalink {
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struct in_addr link_id;
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struct in_addr link_data;
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u_char link_type;
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u_char link_toscount;
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u_short link_tos0metric;
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} rla_link[1]; /* may repeat */
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} un_rla;
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/* Network links advertisements */
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struct {
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struct in_addr nla_mask;
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struct in_addr nla_router[1]; /* may repeat */
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} un_nla;
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/* Summary links advertisements */
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struct {
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struct in_addr sla_mask;
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u_int32_t sla_tosmetric[1]; /* may repeat */
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} un_sla;
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/* AS external links advertisements */
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struct {
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struct in_addr asla_mask;
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struct aslametric {
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u_int32_t asla_tosmetric;
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struct in_addr asla_forward;
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struct in_addr asla_tag;
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} asla_metric[1]; /* may repeat */
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} un_asla;
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/* Multicast group membership */
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struct mcla {
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u_int32_t mcla_vtype;
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struct in_addr mcla_vid;
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} un_mcla[1];
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} lsa_un;
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} ;
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/*
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* TOS metric struct (will be 0 or more in router links update)
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*/
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struct tos_metric {
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u_char tos_type;
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u_char tos_zero;
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u_short tos_metric;
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} ;
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#define OSPF_AUTH_SIZE 8
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/*
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* the main header
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*/
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struct ospfhdr {
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u_char ospf_version;
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u_char ospf_type;
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u_short ospf_len;
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struct in_addr ospf_routerid;
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struct in_addr ospf_areaid;
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u_short ospf_chksum;
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u_short ospf_authtype;
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u_char ospf_authdata[OSPF_AUTH_SIZE];
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union {
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/* Hello packet */
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struct {
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struct in_addr hello_mask;
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u_short hello_helloint;
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u_char hello_options;
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u_char hello_priority;
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u_int32_t hello_deadint;
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struct in_addr hello_dr;
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struct in_addr hello_bdr;
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struct in_addr hello_neighbor[1]; /* may repeat */
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} un_hello;
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/* Database Description packet */
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struct {
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u_char db_zero[2];
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u_char db_options;
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u_char db_flags;
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u_int32_t db_seq;
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struct lsa_hdr db_lshdr[1]; /* may repeat */
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} un_db;
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/* Link State Request */
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struct lsr {
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u_int32_t ls_type;
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struct in_addr ls_stateid;
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struct in_addr ls_router;
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} un_lsr[1]; /* may repeat */
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/* Link State Update */
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struct {
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u_int32_t lsu_count;
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struct lsa lsu_lsa[1]; /* may repeat */
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} un_lsu;
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/* Link State Acknowledgement */
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struct {
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struct lsa_hdr lsa_lshdr[1]; /* may repeat */
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} un_lsa ;
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} ospf_un ;
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} ;
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#define ospf_hello ospf_un.un_hello
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#define ospf_db ospf_un.un_db
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#define ospf_lsr ospf_un.un_lsr
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#define ospf_lsu ospf_un.un_lsu
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#define ospf_lsa ospf_un.un_lsa
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