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
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
|
/* $OpenBSD: mrt.h,v 1.26 2010/04/22 08:24:58 claudio Exp $ */
/*
* Copyright (c) 2003, 2004 Claudio Jeker <claudio@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.
*/
#ifndef __MRT_H__
#define __MRT_H__
/*
* MRT binary packet format
* For more info see:
* draft-ietf-grow-mrt-04.txt, "MRT routing information export format"
* http://www.quagga.net/docs/docs-multi/Packet-Binary-Dump-Format.html
*/
/*
* MRT header:
* +--------+--------+--------+--------+
* | timestamp |
* +--------+--------+--------+--------+
* | type | subtype |
* +--------+--------+--------+--------+
* | length | length of packet excluding this header
* +--------+--------+--------+--------+
*
* ET types include an additional 32bit microsecond field comming after the
* length field.
*/
#define MRT_HEADER_SIZE 12
enum MRT_MSG_TYPES {
MSG_NULL, /* 0 empty msg (deprecated) */
MSG_START, /* 1 sender is starting up */
MSG_DIE, /* 2 receiver should shut down (deprecated) */
MSG_I_AM_DEAD, /* 3 sender is shutting down */
MSG_PEER_DOWN, /* 4 sender's peer is down (deprecated) */
MSG_PROTOCOL_BGP, /* 5 msg is a BGP packet (deprecated) */
MSG_PROTOCOL_RIP, /* 6 msg is a RIP packet */
MSG_PROTOCOL_IDRP, /* 7 msg is an IDRP packet (deprecated) */
MSG_PROTOCOL_RIPNG, /* 8 msg is a RIPNG packet */
MSG_PROTOCOL_BGP4PLUS, /* 9 msg is a BGP4+ packet (deprecated) */
MSG_PROTOCOL_BGP4PLUS1, /* 10 msg is a BGP4+ (draft 01) (deprecated) */
MSG_PROTOCOL_OSPF, /* 11 msg is an OSPF packet */
MSG_TABLE_DUMP, /* 12 routing table dump */
MSG_TABLE_DUMP_V2, /* 13 routing table dump */
MSG_PROTOCOL_BGP4MP=16, /* 16 zebras own packet format */
MSG_PROTOCOL_BGP4MP_ET=17,
MSG_PROTOCOL_ISIS=32, /* 32 msg is a ISIS package */
MSG_PROTOCOL_ISIS_ET=33,
MSG_PROTOCOL_OSPFV3=48, /* 48 msg is a OSPFv3 package */
MSG_PROTOCOL_OSPFV3_ET=49
};
/*
* Main zebra dump format is in MSG_PROTOCOL_BGP4MP exceptions are table dumps
* that are normaly saved as MSG_TABLE_DUMP.
* In most cases this is the format to choose to dump updates et al.
*/
enum MRT_BGP4MP_TYPES {
BGP4MP_STATE_CHANGE, /* state change */
BGP4MP_MESSAGE, /* bgp message */
BGP4MP_ENTRY, /* table dumps (deprecated) */
BGP4MP_SNAPSHOT, /* file name for dump (deprecated) */
BGP4MP_MESSAGE_AS4, /* same as BGP4MP_MESSAGE with 4byte AS */
BGP4MP_STATE_CHANGE_AS4,
BGP4MP_MESSAGE_LOCAL, /* same as BGP4MP_MESSAGE but for self */
BGP4MP_MESSAGE_AS4_LOCAL /* originated updates. Not implemented */
};
/* size of the BGP4MP headers without payload */
#define MRT_BGP4MP_IPv4_HEADER_SIZE 16
#define MRT_BGP4MP_IPv6_HEADER_SIZE 40
/* 4-byte AS variants of the previous */
#define MRT_BGP4MP_AS4_IPv4_HEADER_SIZE 20
#define MRT_BGP4MP_AS4_IPv6_HEADER_SIZE 44
/* If the type is PROTOCOL_BGP4MP and the subtype is either BGP4MP_STATE_CHANGE
* or BGP4MP_MESSAGE the message consists of a common header plus the payload.
* Header format:
*
* +--------+--------+--------+--------+
* | source_as | dest_as |
* +--------+--------+--------+--------+
* | if_index | afi |
* +--------+--------+--------+--------+
* | source_ip |
* +--------+--------+--------+--------+
* | dest_ip |
* +--------+--------+--------+--------+
* | message specific payload ...
* +--------+--------+--------+--------+
*
* The source_ip and dest_ip are dependant of the afi type. For IPv6 source_ip
* and dest_ip are both 16 bytes long.
*
* Payload of a BGP4MP_STATE_CHANGE packet:
*
* +--------+--------+--------+--------+
* | old_state | new_state |
* +--------+--------+--------+--------+
*
* The state values are the same as in RFC 1771.
*
* The payload of a BGP4MP_MESSAGE is the full bgp message with header.
*/
/*
* size of the BGP4MP entries without variable stuff.
* All until nexthop plus attr_len, not included plen, prefix and bgp attrs.
*/
#define MRT_BGP4MP_IPv4_ENTRY_SIZE 18
#define MRT_BGP4MP_IPv6_ENTRY_SIZE 30
#define MRT_BGP4MP_MAX_PREFIXLEN 17
/*
* The "new" table dump format consists of messages of type PROTOCOL_BGP4MP
* and subtype BGP4MP_ENTRY.
*
* +--------+--------+--------+--------+
* | view | status |
* +--------+--------+--------+--------+
* | originated |
* +--------+--------+--------+--------+
* | afi | safi | nhlen |
* +--------+--------+--------+--------+
* | nexthop |
* +--------+--------+--------+--------+
* | plen | prefix variable ... |
* +--------+--------+--------+--------+
* | attr_len | bgp attributes
* +--------+--------+--------+--------+
* bgp attributes, attr_len bytes long
* +--------+--------+--------+--------+
* ... |
* +--------+--------+--------+
*
* View is normaly 0 and originated the time of last change.
* The status seems to be 1 by default but probably something to indicate
* the status of a prefix would be more useful.
* The format of the nexthop address is defined via the afi value. For IPv6
* the nexthop field is 16 bytes long.
* The prefix field is as in the bgp update message variable length. It is
* plen bits long but rounded to the next octet.
*/
/*
* Format for routing table dumps in "old" mrt format.
* Type MSG_TABLE_DUMP and subtype is AFI_IPv4 (1) for IPv4 and AFI_IPv6 (2)
* for IPv6. In the IPv6 case prefix and peer_ip are both 16 bytes long.
*
* +--------+--------+--------+--------+
* | view | seqnum |
* +--------+--------+--------+--------+
* | prefix |
* +--------+--------+--------+--------+
* | plen | status | originated time
* +--------+--------+--------+--------+
* originated time | peer_ip
* +--------+--------+--------+--------+
* peer_ip | peer_as |
* +--------+--------+--------+--------+
* | attr_len | bgp attributes
* +--------+--------+--------+--------+
* bgp attributes, attr_len bytes long
* +--------+--------+--------+--------+
* ... |
* +--------+--------+--------+
*
*
* View is normaly 0 and seqnum just a simple counter for this dump.
* The status field is unused and should be set to 1.
*/
/* size of the dump header until attr_len */
#define MRT_DUMP_HEADER_SIZE 22
/*
* OLD MRT message headers. These structs are here for completion but
* will not be used to generate dumps. It seems that nobody uses those.
*
* Only for bgp messages (type 5, 9 and 10)
* Nota bene for bgp dumps MSG_PROTOCOL_BGP4MP should be used.
*/
enum MRT_BGP_TYPES {
MSG_BGP_NULL,
MSG_BGP_UPDATE, /* raw update packet (contains both withdraws
and announcements) */
MSG_BGP_PREF_UPDATE, /* tlv preferences followed by raw update */
MSG_BGP_STATE_CHANGE, /* state change */
MSG_BGP_SYNC, /* file name for a table dump */
MSG_BGP_OPEN, /* BGP open messages */
MSG_BGP_NOTIFY, /* BGP notify messages */
MSG_BGP_KEEPALIVE /* BGP keepalives */
};
/* if type MSG_PROTOCOL_BGP and subtype MSG_BGP_UPDATE, MSG_BGP_OPEN,
* MSG_BGP_NOTIFY or MSG_BGP_KEEPALIVE
*
* +--------+--------+--------+--------+
* | source_as | source_ip
* +--------+--------+--------+--------+
* source_ip | dest_as |
* +--------+--------+--------+--------+
* | dest_ip |
* +--------+--------+--------+--------+
* | bgp update packet with header et
* +--------+--------+--------+--------+
* al. (variable length) ...
* +--------+--------+--------+--------+
*
* For IPv6 the type is MSG_PROTOCOL_BGP4PLUS and the subtype remains
* MSG_BGP_UPDATE. The source_ip and dest_ip are again extended to 16 bytes.
*/
/*
* For subtype MSG_BGP_STATECHANGE (for all BGP types or just for the
* MSG_PROTOCOL_BGP4PLUS case? Unclear.)
*
* +--------+--------+--------+--------+
* | source_as | source_ip
* +--------+--------+--------+--------+
* source_ip | old_state |
* +--------+--------+--------+--------+
* | new_state |
* +--------+--------+
*
* State are defined in RFC 1771.
*/
/*
* if type MSG_PROTOCOL_BGP and subtype MSG_BGP_SYNC OR
* if type MSG_PROTOCOL_BGP4MP and subtype BGP4MP_SNAPSHOT
* *DEPRECATED*
*
* +--------+--------+--------+--------+
* | view | filename
* +--------+--------+--------+--------+
* filename variable length zero
* +--------+--------+--------+--------+
* terminated ... | 0 |
* +--------+--------+--------+
*/
#define MRT_FILE_LEN 512
enum mrt_type {
MRT_NONE,
MRT_TABLE_DUMP,
MRT_TABLE_DUMP_MP,
MRT_ALL_IN,
MRT_ALL_OUT,
MRT_UPDATE_IN,
MRT_UPDATE_OUT
};
enum mrt_state {
MRT_STATE_RUNNING,
MRT_STATE_OPEN,
MRT_STATE_REOPEN,
MRT_STATE_REMOVE
};
struct mrt {
char rib[PEER_DESCR_LEN];
struct msgbuf wbuf;
LIST_ENTRY(mrt) entry;
u_int32_t peer_id;
u_int32_t group_id;
enum mrt_type type;
enum mrt_state state;
u_int16_t seqnum;
};
struct mrt_config {
struct mrt conf;
char name[MRT_FILE_LEN]; /* base file name */
char file[MRT_FILE_LEN]; /* actual file name */
time_t ReopenTimer;
time_t ReopenTimerInterval;
};
#define MRT2MC(x) ((struct mrt_config *)(x))
#define MRT_MAX_TIMEOUT 7200
struct peer;
struct prefix;
struct rib_entry;
/* prototypes */
void mrt_dump_bgp_msg(struct mrt *, void *, u_int16_t,
struct peer *);
void mrt_dump_state(struct mrt *, u_int16_t, u_int16_t,
struct peer *);
void mrt_clear_seq(void);
void mrt_dump_upcall(struct rib_entry *, void *);
void mrt_done(void *);
void mrt_write(struct mrt *);
void mrt_clean(struct mrt *);
void mrt_init(struct imsgbuf *, struct imsgbuf *);
int mrt_timeout(struct mrt_head *);
void mrt_reconfigure(struct mrt_head *);
void mrt_handler(struct mrt_head *);
struct mrt *mrt_get(struct mrt_head *, struct mrt *);
int mrt_mergeconfig(struct mrt_head *, struct mrt_head *);
#endif
|
