ospf.h revision 39297 
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 */
93struct 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 */
105struct 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 */
158struct 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 */
169struct 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