ospf6.h revision 56893 
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 OSPF6_OPTION_V6	0x01	/* V6 bit: A bit for peeping tom */
33#define OSPF6_OPTION_E	0x02	/* E bit: External routes advertised	*/
34#define OSPF6_OPTION_MC	0x04	/* MC bit: Multicast capable */
35#define OSPF6_OPTION_N	0x08	/* N bit: For type-7 LSA */
36#define OSPF6_OPTION_R	0x10	/* R bit: Router bit */
37#define OSPF6_OPTION_DC	0x20	/* DC bit: Demand circuits */
38
39
40/* db_flags	*/
41#define	OSPF6_DB_INIT		0x04	    /*	*/
42#define	OSPF6_DB_MORE		0x02
43#define	OSPF6_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_INTER_AP	3   /* Inter-Area-Prefix */
49#define	LS_TYPE_INTER_AR	4   /* Inter-Area-Router */
50#define	LS_TYPE_ASE		5   /* ASE */
51#define	LS_TYPE_GROUP		6   /* Group membership */
52#define	LS_TYPE_TYPE7		7   /* Type 7 LSA */
53#define	LS_TYPE_LINK		8   /* Link LSA */
54#define	LS_TYPE_INTRA_AP	9   /* Intra-Area-Prefix */
55#define	LS_TYPE_MAX		10
56#define LS_TYPE_MASK		0x1fff
57
58#define LS_SCOPE_LINKLOCAL	0x0000
59#define LS_SCOPE_AREA		0x2000
60#define LS_SCOPE_AS		0x4000
61#define LS_SCOPE_MASK		0x6000
62
63/*************************************************
64 *
65 * is the above a bug in the documentation?
66 *
67 *************************************************/
68
69
70/* rla_link.link_type	*/
71#define	RLA_TYPE_ROUTER		1   /* point-to-point to another router	*/
72#define	RLA_TYPE_TRANSIT	2   /* connection to transit network	*/
73#define RLA_TYPE_VIRTUAL	4   /* virtual link			*/
74
75/* rla_flags	*/
76#define	RLA_FLAG_B	0x01
77#define	RLA_FLAG_E	0x02
78#define	RLA_FLAG_V	0x04
79#define	RLA_FLAG_W	0x08
80
81/* sla_tosmetric breakdown	*/
82#define	SLA_MASK_TOS		0x7f000000
83#define	SLA_MASK_METRIC		0x00ffffff
84#define SLA_SHIFT_TOS		24
85
86/* asla_tosmetric breakdown	*/
87#define	ASLA_FLAG_EXTERNAL	0x80000000
88#define	ASLA_MASK_TOS		0x7f000000
89#define	ASLA_SHIFT_TOS		24
90#define	ASLA_MASK_METRIC	0x00ffffff
91
92/* multicast vertex type */
93#define	MCLA_VERTEX_ROUTER	1
94#define	MCLA_VERTEX_NETWORK	2
95
96typedef u_int32_t rtrid_t;
97
98/* link state advertisement header */
99struct lsa_hdr {
100    u_int16_t ls_age;
101    u_int16_t ls_type;
102    rtrid_t ls_stateid;
103    rtrid_t ls_router;
104    u_int32_t ls_seq;
105    u_int16_t ls_chksum;
106    u_int16_t ls_length;
107} ;
108
109struct lsa_prefix {
110    u_int8_t lsa_p_len;
111    u_int8_t lsa_p_opt;
112    u_int16_t lsa_p_mbz;
113    u_int8_t lsa_p_prefix[4];
114};
115
116/* link state advertisement */
117struct lsa {
118    struct lsa_hdr ls_hdr;
119
120    /* Link state types */
121    union {
122	/* Router links advertisements */
123	struct {
124	    union {
125		u_int8_t flg;
126		u_int32_t opt;
127	    } rla_flgandopt;
128#define rla_flags	rla_flgandopt.flg
129#define rla_options	rla_flgandopt.opt
130	    struct rlalink {
131		u_int8_t link_type;
132		u_int8_t link_zero[1];
133		u_int16_t link_metric;
134		u_int32_t link_ifid;
135		u_int32_t link_nifid;
136		rtrid_t link_nrtid;
137	    } rla_link[1];		/* may repeat	*/
138	} un_rla;
139
140	/* Network links advertisements */
141	struct {
142	    u_int32_t nla_options;
143	    rtrid_t nla_router[1];	/* may repeat	*/
144	} un_nla;
145
146	/* Inter Area Prefix LSA */
147	struct {
148	    u_int32_t inter_ap_metric;
149	    struct lsa_prefix inter_ap_prefix[1];
150	} un_inter_ap;
151
152#if 0
153	/* Summary links advertisements */
154	struct {
155	    struct in_addr sla_mask;
156	    u_int32_t sla_tosmetric[1];	/* may repeat	*/
157	} un_sla;
158
159	/* AS external links advertisements */
160	struct {
161	    struct in_addr asla_mask;
162	    struct aslametric {
163		u_int32_t asla_tosmetric;
164		struct in_addr asla_forward;
165		struct in_addr asla_tag;
166	    } asla_metric[1];		/* may repeat	*/
167	} un_asla;
168
169	/* Multicast group membership */
170	struct mcla {
171	    u_int32_t mcla_vtype;
172	    struct in_addr mcla_vid;
173	} un_mcla[1];
174#endif
175
176	/* Type 7 LSA */
177
178	/* Link LSA */
179	struct llsa {
180	    union {
181		u_int8_t pri;
182		u_int32_t opt;
183	    } llsa_priandopt;
184#define llsa_priority	llsa_priandopt.pri
185#define llsa_options	llsa_priandopt.opt
186	    struct in6_addr llsa_lladdr;
187	    u_int32_t llsa_nprefix;
188	    struct lsa_prefix llsa_prefix[1];
189	} un_llsa;
190
191	/* Intra-Area-Prefix */
192	struct {
193	    u_int16_t intra_ap_nprefix;
194	    u_int16_t intra_ap_lstype;
195	    rtrid_t intra_ap_lsid;
196	    rtrid_t intra_ap_rtid;
197	    struct lsa_prefix intra_ap_prefix[1];
198	} un_intra_ap;
199    } lsa_un;
200} ;
201
202
203/*
204 * TOS metric struct (will be 0 or more in router links update)
205 */
206struct tos_metric {
207    u_int8_t tos_type;
208    u_int8_t tos_zero;
209    u_int16_t tos_metric;
210} ;
211
212#define	OSPF_AUTH_SIZE	8
213
214/*
215 * the main header
216 */
217struct ospf6hdr {
218    u_int8_t ospf6_version;
219    u_int8_t ospf6_type;
220    u_int16_t ospf6_len;
221    rtrid_t ospf6_routerid;
222    rtrid_t ospf6_areaid;
223    u_int16_t ospf6_chksum;
224    u_int8_t ospf6_instanceid;
225    u_int8_t ospf6_rsvd;
226    union {
227
228	/* Hello packet */
229	struct {
230	    u_int32_t hello_ifid;
231	    union {
232		u_int8_t pri;
233		u_int32_t opt;
234	    } hello_priandopt;
235#define hello_priority	hello_priandopt.pri
236#define hello_options	hello_priandopt.opt
237	    u_int16_t hello_helloint;
238	    u_int16_t hello_deadint;
239	    rtrid_t hello_dr;
240	    rtrid_t hello_bdr;
241	    rtrid_t hello_neighbor[1]; /* may repeat	*/
242	} un_hello;
243
244	/* Database Description packet */
245	struct {
246	    u_int32_t db_options;
247	    u_int16_t db_mtu;
248	    u_int8_t db_mbz;
249	    u_int8_t db_flags;
250	    u_int32_t db_seq;
251	    struct lsa_hdr db_lshdr[1]; /* may repeat	*/
252	} un_db;
253
254	/* Link State Request */
255	struct lsr {
256	    u_int16_t ls_mbz;
257	    u_int16_t ls_type;
258	    rtrid_t ls_stateid;
259	    rtrid_t ls_router;
260	} un_lsr[1];		/* may repeat	*/
261
262	/* Link State Update */
263	struct {
264	    u_int32_t lsu_count;
265	    struct lsa lsu_lsa[1]; /* may repeat	*/
266	} un_lsu;
267
268	/* Link State Acknowledgement */
269	struct {
270	    struct lsa_hdr lsa_lshdr[1]; /* may repeat	*/
271	} un_lsa ;
272    } ospf6_un ;
273} ;
274
275#define	ospf6_hello	ospf6_un.un_hello
276#define	ospf6_db	ospf6_un.un_db
277#define	ospf6_lsr	ospf6_un.un_lsr
278#define	ospf6_lsu	ospf6_un.un_lsu
279#define	ospf6_lsa	ospf6_un.un_lsa
280
281