ospf.h revision 162017 
1/* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.16.2.1 2005/08/23 11:16:30 hannes Exp $ (LBL) */
2/*
3 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that: (1) source code distributions
8 * retain the above copyright notice and this paragraph in its entirety, (2)
9 * distributions including binary code include the above copyright notice and
10 * this paragraph in its entirety in the documentation or other materials
11 * provided with the distribution, and (3) all advertising materials mentioning
12 * features or use of this software display the following acknowledgement:
13 * ``This product includes software developed by the University of California,
14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
15 * the University nor the names of its contributors may be used to endorse
16 * or promote products derived from this software without specific prior
17 * written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 *
22 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
23 */
24#define	OSPF_TYPE_UMD           0	/* UMd's special monitoring packets */
25#define	OSPF_TYPE_HELLO         1	/* Hello */
26#define	OSPF_TYPE_DD            2	/* Database Description */
27#define	OSPF_TYPE_LS_REQ        3	/* Link State Request */
28#define	OSPF_TYPE_LS_UPDATE     4	/* Link State Update */
29#define	OSPF_TYPE_LS_ACK        5	/* Link State Ack */
30
31/* Options field
32 *
33 * +------------------------------------+
34 * | * | O | DC | EA | N/P | MC | E | T |
35 * +------------------------------------+
36 *
37 */
38
39#define OSPF_OPTION_T	0x01	/* T bit: TOS support	*/
40#define OSPF_OPTION_E	0x02	/* E bit: External routes advertised	*/
41#define	OSPF_OPTION_MC	0x04	/* MC bit: Multicast capable */
42#define	OSPF_OPTION_NP	0x08	/* N/P bit: NSSA capable */
43#define	OSPF_OPTION_EA	0x10	/* EA bit: External Attribute capable */
44#define	OSPF_OPTION_DC	0x20	/* DC bit: Demand circuit capable */
45#define	OSPF_OPTION_O	0x40	/* O bit: Opaque LSA capable */
46#define	OSPF_OPTION_DN	0x80	/* DN bit: Up/Down Bit capable - draft-ietf-ospf-2547-dnbit-04 */
47
48/* ospf_authtype	*/
49#define	OSPF_AUTH_NONE		0	/* No auth-data */
50#define	OSPF_AUTH_SIMPLE	1	/* Simple password */
51#define OSPF_AUTH_MD5		2	/* MD5 authentication */
52#define OSPF_AUTH_MD5_LEN	16	/* length of MD5 authentication */
53
54/* db_flags	*/
55#define	OSPF_DB_INIT		0x04	    /*	*/
56#define	OSPF_DB_MORE		0x02
57#define	OSPF_DB_MASTER		0x01
58
59/* ls_type	*/
60#define	LS_TYPE_ROUTER		1   /* router link */
61#define	LS_TYPE_NETWORK		2   /* network link */
62#define	LS_TYPE_SUM_IP		3   /* summary link */
63#define	LS_TYPE_SUM_ABR		4   /* summary area link */
64#define	LS_TYPE_ASE		5   /* ASE  */
65#define	LS_TYPE_GROUP		6   /* Group membership (multicast */
66				    /* extensions 23 July 1991) */
67#define	LS_TYPE_NSSA            7   /* rfc3101 - Not so Stubby Areas */
68#define	LS_TYPE_OPAQUE_LL       9   /* rfc2370 - Opaque Link Local */
69#define	LS_TYPE_OPAQUE_AL      10   /* rfc2370 - Opaque Link Local */
70#define	LS_TYPE_OPAQUE_DW      11   /* rfc2370 - Opaque Domain Wide */
71
72#define LS_OPAQUE_TYPE_TE       1   /* rfc3630 */
73#define LS_OPAQUE_TYPE_GRACE    3   /* rfc3623 */
74#define LS_OPAQUE_TYPE_RI       4   /* draft-ietf-ospf-cap-03 */
75
76#define LS_OPAQUE_TE_TLV_ROUTER 1   /* rfc3630 */
77#define LS_OPAQUE_TE_TLV_LINK   2   /* rfc3630 */
78
79#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE             1 /* rfc3630 */
80#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID               2 /* rfc3630 */
81#define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP              3 /* rfc3630 */
82#define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP             4 /* rfc3630 */
83#define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC             5 /* rfc3630 */
84#define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW                6 /* rfc3630 */
85#define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW            7 /* rfc3630 */
86#define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW              8 /* rfc3630 */
87#define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP           9 /* rfc3630 */
88#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* draft-ietf-ccamp-ospf-gmpls-extensions */
89#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* draft-ietf-ccamp-ospf-gmpls-extensions */
90#define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR    15 /* draft-ietf-ccamp-ospf-gmpls-extensions */
91#define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP    16 /* draft-ietf-ccamp-ospf-gmpls-extensions */
92#define LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS       17 /* rfc4124 */
93
94#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP        1  /* rfc3630 */
95#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA         2  /* rfc3630 */
96
97#define LS_OPAQUE_GRACE_TLV_PERIOD       1 /* rfc3623 */
98#define LS_OPAQUE_GRACE_TLV_REASON       2 /* rfc3623 */
99#define LS_OPAQUE_GRACE_TLV_INT_ADDRESS  3 /* rfc3623 */
100
101#define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN     0 /* rfc3623 */
102#define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART  1 /* rfc3623 */
103#define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE  2 /* rfc3623 */
104#define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH   3 /* rfc3623 */
105
106#define LS_OPAQUE_RI_TLV_CAP             1 /* draft-ietf-ospf-cap-03 */
107
108/*************************************************
109 *
110 * is the above a bug in the documentation?
111 *
112 *************************************************/
113
114
115/* rla_link.link_type	*/
116#define	RLA_TYPE_ROUTER		1   /* point-to-point to another router	*/
117#define	RLA_TYPE_TRANSIT	2   /* connection to transit network	*/
118#define	RLA_TYPE_STUB		3   /* connection to stub network	*/
119#define RLA_TYPE_VIRTUAL	4   /* virtual link			*/
120
121/* rla_flags	*/
122#define	RLA_FLAG_B	0x01
123#define	RLA_FLAG_E	0x02
124#define	RLA_FLAG_W1	0x04
125#define	RLA_FLAG_W2	0x08
126
127/* sla_tosmetric breakdown	*/
128#define	SLA_MASK_TOS		0x7f000000
129#define	SLA_MASK_METRIC		0x00ffffff
130#define SLA_SHIFT_TOS		24
131
132/* asla_tosmetric breakdown	*/
133#define	ASLA_FLAG_EXTERNAL	0x80000000
134#define	ASLA_MASK_TOS		0x7f000000
135#define	ASLA_SHIFT_TOS		24
136#define	ASLA_MASK_METRIC	0x00ffffff
137
138/* multicast vertex type */
139#define	MCLA_VERTEX_ROUTER	1
140#define	MCLA_VERTEX_NETWORK	2
141
142/* link state advertisement header */
143struct lsa_hdr {
144    u_int16_t ls_age;
145    u_int8_t ls_options;
146    u_int8_t ls_type;
147    union {
148        struct in_addr lsa_id;
149        struct { /* opaque LSAs change the LSA-ID field */
150            u_int8_t opaque_type;
151            u_int8_t opaque_id[3];
152	} opaque_field;
153    } un_lsa_id;
154    struct in_addr ls_router;
155    u_int32_t ls_seq;
156    u_int16_t ls_chksum;
157    u_int16_t ls_length;
158};
159
160/* link state advertisement */
161struct lsa {
162    struct lsa_hdr ls_hdr;
163
164    /* Link state types */
165    union {
166	/* Router links advertisements */
167	struct {
168	    u_int8_t rla_flags;
169	    u_int8_t rla_zero[1];
170	    u_int16_t rla_count;
171	    struct rlalink {
172		struct in_addr link_id;
173		struct in_addr link_data;
174		u_int8_t link_type;
175		u_int8_t link_toscount;
176		u_int16_t link_tos0metric;
177	    } rla_link[1];		/* may repeat	*/
178	} un_rla;
179
180	/* Network links advertisements */
181	struct {
182	    struct in_addr nla_mask;
183	    struct in_addr nla_router[1];	/* may repeat	*/
184	} un_nla;
185
186	/* Summary links advertisements */
187	struct {
188	    struct in_addr sla_mask;
189	    u_int32_t sla_tosmetric[1];	/* may repeat	*/
190	} un_sla;
191
192	/* AS external links advertisements */
193	struct {
194	    struct in_addr asla_mask;
195	    struct aslametric {
196		u_int32_t asla_tosmetric;
197		struct in_addr asla_forward;
198		struct in_addr asla_tag;
199	    } asla_metric[1];		/* may repeat	*/
200	} un_asla;
201
202	/* Multicast group membership */
203	struct mcla {
204	    u_int32_t mcla_vtype;
205	    struct in_addr mcla_vid;
206	} un_mcla[1];
207
208        /* Opaque TE LSA */
209        struct {
210	    u_int16_t type;
211	    u_int16_t length;
212	    u_int8_t data[1]; /* may repeat   */
213	} un_te_lsa_tlv;
214
215        /* Opaque Grace LSA */
216        struct {
217	    u_int16_t type;
218	    u_int16_t length;
219	    u_int8_t data[1]; /* may repeat   */
220	} un_grace_tlv;
221
222        /* Opaque Router information LSA */
223        struct {
224	    u_int16_t type;
225	    u_int16_t length;
226	    u_int8_t data[1]; /* may repeat   */
227	} un_ri_tlv;
228
229        /* Unknown LSA */
230        struct unknown {
231	    u_int8_t data[1]; /* may repeat   */
232	} un_unknown[1];
233
234    } lsa_un;
235};
236
237
238/*
239 * TOS metric struct (will be 0 or more in router links update)
240 */
241struct tos_metric {
242    u_int8_t tos_type;
243    u_int8_t tos_zero;
244    u_int16_t tos_metric;
245};
246
247#define	OSPF_AUTH_SIZE	8
248
249/*
250 * the main header
251 */
252struct ospfhdr {
253    u_int8_t ospf_version;
254    u_int8_t ospf_type;
255    u_int16_t ospf_len;
256    struct in_addr ospf_routerid;
257    struct in_addr ospf_areaid;
258    u_int16_t ospf_chksum;
259    u_int16_t ospf_authtype;
260    u_int8_t ospf_authdata[OSPF_AUTH_SIZE];
261    union {
262
263	/* Hello packet */
264	struct {
265	    struct in_addr hello_mask;
266	    u_int16_t hello_helloint;
267	    u_int8_t hello_options;
268	    u_int8_t hello_priority;
269	    u_int32_t hello_deadint;
270	    struct in_addr hello_dr;
271	    struct in_addr hello_bdr;
272	    struct in_addr hello_neighbor[1]; /* may repeat	*/
273	} un_hello;
274
275	/* Database Description packet */
276	struct {
277	    u_int8_t db_zero[2];
278	    u_int8_t db_options;
279	    u_int8_t db_flags;
280	    u_int32_t db_seq;
281	    struct lsa_hdr db_lshdr[1]; /* may repeat	*/
282	} un_db;
283
284	/* Link State Request */
285	struct lsr {
286	    u_int8_t ls_type[4];
287            union {
288                struct in_addr ls_stateid;
289                struct { /* opaque LSAs change the LSA-ID field */
290                    u_int8_t opaque_type;
291                    u_int8_t opaque_id[3];
292                } opaque_field;
293            } un_ls_stateid;
294	    struct in_addr ls_router;
295	} un_lsr[1];		/* may repeat	*/
296
297	/* Link State Update */
298	struct {
299	    u_int32_t lsu_count;
300	    struct lsa lsu_lsa[1]; /* may repeat	*/
301	} un_lsu;
302
303	/* Link State Acknowledgement */
304	struct {
305	    struct lsa_hdr lsa_lshdr[1]; /* may repeat	*/
306	} un_lsa ;
307    } ospf_un ;
308};
309
310#define	ospf_hello	ospf_un.un_hello
311#define	ospf_db		ospf_un.un_db
312#define	ospf_lsr	ospf_un.un_lsr
313#define	ospf_lsu	ospf_un.un_lsu
314#define	ospf_lsa	ospf_un.un_lsa
315
316