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/* $OpenBSD: ospf.h,v 1.11 2019/04/14 00:37:31 dlg Exp $ */
/*
* Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
*/
#define OSPF_TYPE_UMD 0 /* UMd's special monitoring packets */
#define OSPF_TYPE_HELLO 1 /* Hello */
#define OSPF_TYPE_DB 2 /* Database Description */
#define OSPF_TYPE_LSR 3 /* Link State Request */
#define OSPF_TYPE_LSU 4 /* Link State Update */
#define OSPF_TYPE_LSA 5 /* Link State Ack */
#define OSPF_TYPE_MAX 6
/* Options *_options */
#define OSPF_OPTION_T 0x01 /* T bit: TOS support */
#define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */
#define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */
/* ospf_authtype */
#define OSPF_AUTH_NONE 0 /* No auth-data */
#define OSPF_AUTH_SIMPLE 1 /* Simple password */
#define OSPF_AUTH_MD5 2 /* MD5 authentication */
#define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */
/* db_flags */
#define OSPF_DB_INIT 0x04 /* */
#define OSPF_DB_MORE 0x02
#define OSPF_DB_MASTER 0x01
/* ls_type */
#define LS_TYPE_ROUTER 1 /* router link */
#define LS_TYPE_NETWORK 2 /* network link */
#define LS_TYPE_SUM_IP 3 /* summary link */
#define LS_TYPE_SUM_ABR 4 /* summary area link */
#define LS_TYPE_ASE 5 /* ASE */
#define LS_TYPE_GROUP 6 /* Group membership (multicast */
/* extensions 23 July 1991) */
#define LS_TYPE_MAX 7
/*************************************************
*
* is the above a bug in the documentation?
*
*************************************************/
/* rla_link.link_type */
#define RLA_TYPE_ROUTER 1 /* point-to-point to another router */
#define RLA_TYPE_TRANSIT 2 /* connection to transit network */
#define RLA_TYPE_STUB 3 /* connection to stub network */
#define RLA_TYPE_VIRTUAL 4 /* virtual link */
/* rla_flags */
#define RLA_FLAG_B 0x01
#define RLA_FLAG_E 0x02
#define RLA_FLAG_W1 0x04
#define RLA_FLAG_W2 0x08
/* sla_tosmetric breakdown */
#define SLA_MASK_TOS 0x7f000000
#define SLA_MASK_METRIC 0x00ffffff
#define SLA_SHIFT_TOS 24
/* asla_tosmetric breakdown */
#define ASLA_FLAG_EXTERNAL 0x80000000
#define ASLA_MASK_TOS 0x7f000000
#define ASLA_SHIFT_TOS 24
#define ASLA_MASK_METRIC 0x00ffffff
/* multicast vertex type */
#define MCLA_VERTEX_ROUTER 1
#define MCLA_VERTEX_NETWORK 2
/* link state advertisement header */
struct lsa_hdr {
u_short ls_age;
u_char ls_options;
u_char ls_type;
struct in_addr ls_stateid;
struct in_addr ls_router;
u_int32_t ls_seq;
u_short ls_chksum;
u_short ls_length;
} ;
/* link state advertisement */
struct lsa {
struct lsa_hdr ls_hdr;
/* Link state types */
union {
/* Router links advertisements */
struct {
u_char rla_flags;
u_char rla_zero[1];
u_short rla_count;
struct rlalink {
struct in_addr link_id;
struct in_addr link_data;
u_char link_type;
u_char link_toscount;
u_short link_tos0metric;
} rla_link[1]; /* may repeat */
} un_rla;
/* Network links advertisements */
struct {
struct in_addr nla_mask;
struct in_addr nla_router[1]; /* may repeat */
} un_nla;
/* Summary links advertisements */
struct {
struct in_addr sla_mask;
u_int32_t sla_tosmetric[1]; /* may repeat */
} un_sla;
/* AS external links advertisements */
struct {
struct in_addr asla_mask;
struct aslametric {
u_int32_t asla_tosmetric;
struct in_addr asla_forward;
u_int32_t asla_tag;
} asla_metric[1]; /* may repeat */
} un_asla;
/* Multicast group membership */
struct mcla {
u_int32_t mcla_vtype;
struct in_addr mcla_vid;
} un_mcla[1];
} lsa_un;
} ;
/*
* TOS metric struct (will be 0 or more in router links update)
*/
struct tos_metric {
u_char tos_type;
u_char tos_zero;
u_short tos_metric;
} ;
#define OSPF_AUTH_SIZE 8
/*
* the main header
*/
struct ospfhdr {
u_char ospf_version;
u_char ospf_type;
u_short ospf_len;
struct in_addr ospf_routerid;
struct in_addr ospf_areaid;
u_short ospf_chksum;
u_short ospf_authtype;
u_char ospf_authdata[OSPF_AUTH_SIZE];
union {
/* Hello packet */
struct {
struct in_addr hello_mask;
u_short hello_helloint;
u_char hello_options;
u_char hello_priority;
u_int32_t hello_deadint;
struct in_addr hello_dr;
struct in_addr hello_bdr;
struct in_addr hello_neighbor[1]; /* may repeat */
} un_hello;
/* Database Description packet */
struct {
u_int16_t db_mtu;
u_char db_options;
u_char db_flags;
u_int32_t db_seq;
struct lsa_hdr db_lshdr[1]; /* may repeat */
} un_db;
/* Link State Request */
struct lsr {
u_int32_t ls_type;
struct in_addr ls_stateid;
struct in_addr ls_router;
} un_lsr[1]; /* may repeat */
/* Link State Update */
struct {
u_int32_t lsu_count;
struct lsa lsu_lsa[1]; /* may repeat */
} un_lsu;
/* Link State Acknowledgement */
struct {
struct lsa_hdr lsa_lshdr[1]; /* may repeat */
} un_lsa ;
} ospf_un ;
} ;
struct ospf_md5_authdata {
uint16_t auth_md5_offset;
uint8_t auth_keyid;
uint8_t auth_len;
uint32_t auth_seq;
};
#define ospf_hello ospf_un.un_hello
#define ospf_db ospf_un.un_db
#define ospf_lsr ospf_un.un_lsr
#define ospf_lsu ospf_un.un_lsu
#define ospf_lsa ospf_un.un_lsa
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