ospf.h revision 17680 
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 */
90struct 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 */
102struct 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 */
155struct 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 */
166struct 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