1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
/* $OpenBSD: ospf.h,v 1.18 2010/02/16 08:39:05 dlg Exp $ */
/*
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* OSPF protocol definitions */
#ifndef _OSPF_H_
#define _OSPF_H_
#include <netinet/in.h>
/* misc */
#define OSPF_VERSION 2
#define IPPROTO_OSPF 89
#define AllSPFRouters "224.0.0.5"
#define AllDRouters "224.0.0.6"
#define PACKET_HDR 100 /* XXX used to calculate the IP payload */
#define DEFAULT_METRIC 10
#define DEFAULT_REDIST_METRIC 100
#define MIN_METRIC 1
#define MAX_METRIC 65535 /* sum & as-ext lsa use 24bit metrics */
#define DEFAULT_PRIORITY 1
#define MIN_PRIORITY 0
#define MAX_PRIORITY 255
#define DEFAULT_HELLO_INTERVAL 10
#define MIN_HELLO_INTERVAL 1
#define MAX_HELLO_INTERVAL 65535
/* msec */
#define DEFAULT_FAST_INTERVAL 333
#define MIN_FAST_INTERVAL 50
#define MAX_FAST_INTERVAL 333
#define DEFAULT_RTR_DEAD_TIME 40
#define FAST_RTR_DEAD_TIME 1
#define MIN_RTR_DEAD_TIME 2
#define MAX_RTR_DEAD_TIME 2147483647
#define DEFAULT_RXMT_INTERVAL 5
#define MIN_RXMT_INTERVAL 5
#define MAX_RXMT_INTERVAL 3600
#define DEFAULT_TRANSMIT_DELAY 1
#define MIN_TRANSMIT_DELAY 1
#define MAX_TRANSMIT_DELAY 3600
#define DEFAULT_ADJ_TMOUT 60
#define DEFAULT_NBR_TMOUT 86400 /* 24 hours */
/* msec */
#define DEFAULT_SPF_DELAY 1000
#define MIN_SPF_DELAY 10
#define MAX_SPF_DELAY 10000
/* msec */
#define DEFAULT_SPF_HOLDTIME 5000
#define MIN_SPF_HOLDTIME 10
#define MAX_SPF_HOLDTIME 5000
#define MIN_MD_ID 0
#define MAX_MD_ID 255
#define MAX_SIMPLE_AUTH_LEN 8
/* OSPF compatibility flags */
#define OSPF_OPTION_E 0x02
#define OSPF_OPTION_MC 0x04
#define OSPF_OPTION_NP 0x08
#define OSPF_OPTION_EA 0x10
#define OSPF_OPTION_DC 0x20
/* OSPF packet types */
#define PACKET_TYPE_HELLO 1
#define PACKET_TYPE_DD 2
#define PACKET_TYPE_LS_REQUEST 3
#define PACKET_TYPE_LS_UPDATE 4
#define PACKET_TYPE_LS_ACK 5
/* OSPF auth types */
#define AUTH_TYPE_NONE 0
#define AUTH_TYPE_SIMPLE 1
#define AUTH_TYPE_CRYPT 2
#define MIN_AUTHTYPE 0
#define MAX_AUTHTYPE 2
/* LSA */
#define LS_REFRESH_TIME 1800
#define MIN_LS_INTERVAL 5
#define MIN_LS_ARRIVAL 1
#define DEFAULT_AGE 0
#define MAX_AGE 3600
#define CHECK_AGE 300
#define MAX_AGE_DIFF 900
#define LS_INFINITY 0xffffff
#define RESV_SEQ_NUM 0x80000000 /* reserved and "unused" */
#define INIT_SEQ_NUM 0x80000001
#define MAX_SEQ_NUM 0x7fffffff
/* OSPF header */
struct crypt {
u_int16_t dummy;
u_int8_t keyid;
u_int8_t len;
u_int32_t seq_num;
};
struct ospf_hdr {
u_int8_t version;
u_int8_t type;
u_int16_t len;
u_int32_t rtr_id;
u_int32_t area_id;
u_int16_t chksum;
u_int16_t auth_type;
union {
char simple[MAX_SIMPLE_AUTH_LEN];
struct crypt crypt;
} auth_key;
};
/* Hello header (type 1) */
struct hello_hdr {
u_int32_t mask;
u_int16_t hello_interval;
u_int8_t opts;
u_int8_t rtr_priority;
u_int32_t rtr_dead_interval;
u_int32_t d_rtr;
u_int32_t bd_rtr;
};
/* Database Description header (type 2) */
struct db_dscrp_hdr {
u_int16_t iface_mtu;
u_int8_t opts;
u_int8_t bits;
u_int32_t dd_seq_num;
};
#define OSPF_DBD_MS 0x01
#define OSPF_DBD_M 0x02
#define OSPF_DBD_I 0x04
/* Link State Request header (type 3) */
struct ls_req_hdr {
u_int32_t type;
u_int32_t ls_id;
u_int32_t adv_rtr;
};
/* Link State Update header (type 4) */
struct ls_upd_hdr {
u_int32_t num_lsa;
};
#define LSA_TYPE_ROUTER 1
#define LSA_TYPE_NETWORK 2
#define LSA_TYPE_SUM_NETWORK 3
#define LSA_TYPE_SUM_ROUTER 4
#define LSA_TYPE_EXTERNAL 5
#define LINK_TYPE_POINTTOPOINT 1
#define LINK_TYPE_TRANSIT_NET 2
#define LINK_TYPE_STUB_NET 3
#define LINK_TYPE_VIRTUAL 4
/* LSA headers */
#define LSA_METRIC_MASK 0x00ffffff /* only for sum & as-ext */
#define LSA_ASEXT_E_FLAG 0x80000000
#define OSPF_RTR_B 0x01
#define OSPF_RTR_E 0x02
#define OSPF_RTR_V 0x04
struct lsa_rtr {
u_int8_t flags;
u_int8_t dummy;
u_int16_t nlinks;
};
struct lsa_rtr_link {
u_int32_t id;
u_int32_t data;
u_int8_t type;
u_int8_t num_tos;
u_int16_t metric;
};
struct lsa_net {
u_int32_t mask;
u_int32_t att_rtr[1];
};
struct lsa_net_link {
u_int32_t att_rtr;
};
struct lsa_sum {
u_int32_t mask;
u_int32_t metric; /* only lower 24 bit */
};
struct lsa_asext {
u_int32_t mask;
u_int32_t metric; /* lower 24 bit plus E bit */
u_int32_t fw_addr;
u_int32_t ext_tag;
};
struct lsa_hdr {
u_int16_t age;
u_int8_t opts;
u_int8_t type;
u_int32_t ls_id;
u_int32_t adv_rtr;
u_int32_t seq_num;
u_int16_t ls_chksum;
u_int16_t len;
};
#define LS_CKSUM_OFFSET ((u_int16_t)(&((struct lsa_hdr *)0)->ls_chksum))
struct lsa {
struct lsa_hdr hdr;
union {
struct lsa_rtr rtr;
struct lsa_net net;
struct lsa_sum sum;
struct lsa_asext asext;
} data;
};
#endif /* !_OSPF_H_ */
|
