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
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
|
/* $OpenBSD: bgpd.h,v 1.166 2005/05/27 17:52:11 claudio Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@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 __BGPD_H__
#define __BGPD_H__
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <net/pfkeyv2.h>
#include <poll.h>
#include <stdarg.h>
#define BGP_VERSION 4
#define BGP_PORT 179
#define CONFFILE "/etc/bgpd.conf"
#define BGPD_USER "_bgpd"
#define PEER_DESCR_LEN 32
#define PFTABLE_LEN 16
#define TCP_MD5_KEY_LEN 80
#define IPSEC_ENC_KEY_LEN 32
#define IPSEC_AUTH_KEY_LEN 20
#define MAX_PKTSIZE 4096
#define MIN_HOLDTIME 3
#define READ_BUF_SIZE 65535
#define RT_BUF_SIZE 16384
#define MAX_RTSOCK_BUF 128 * 1024
#define BGPD_OPT_VERBOSE 0x0001
#define BGPD_OPT_VERBOSE2 0x0002
#define BGPD_OPT_NOACTION 0x0004
#define BGPD_FLAG_NO_FIB_UPDATE 0x0001
#define BGPD_FLAG_NO_EVALUATE 0x0002
#define BGPD_FLAG_REFLECTOR 0x0004
#define BGPD_FLAG_REDIST_STATIC 0x0008
#define BGPD_FLAG_REDIST_CONNECTED 0x0010
#define BGPD_FLAG_DECISION_MASK 0x0f00
#define BGPD_FLAG_DECISION_ROUTEAGE 0x0100
#define BGPD_FLAG_DECISION_TRANS_AS 0x0200
#define BGPD_LOG_UPDATES 0x0001
#define SOCKET_NAME "/var/run/bgpd.sock"
#define F_BGPD_INSERTED 0x0001
#define F_KERNEL 0x0002
#define F_CONNECTED 0x0004
#define F_NEXTHOP 0x0008
#define F_DOWN 0x0010
#define F_STATIC 0x0020
#define F_LONGER 0x0040
#define F_REJECT 0x0080
#define F_BLACKHOLE 0x0100
enum {
PROC_MAIN,
PROC_SE,
PROC_RDE
} bgpd_process;
enum reconf_action {
RECONF_NONE,
RECONF_KEEP,
RECONF_REINIT,
RECONF_DELETE
};
struct buf {
TAILQ_ENTRY(buf) entry;
u_char *buf;
size_t size;
size_t wpos;
size_t rpos;
int fd;
};
struct msgbuf {
TAILQ_HEAD(, buf) bufs;
u_int32_t queued;
int fd;
};
struct bgpd_addr {
sa_family_t af;
union {
struct in_addr v4;
struct in6_addr v6;
u_int8_t addr8[16];
u_int16_t addr16[8];
u_int32_t addr32[4];
} ba; /* 128-bit address */
u_int32_t scope_id; /* iface scope id for v6 */
#define v4 ba.v4
#define v6 ba.v6
#define addr8 ba.addr8
#define addr16 ba.addr16
#define addr32 ba.addr32
};
#define DEFAULT_LISTENER 0x01
#define LISTENER_LISTENING 0x02
struct listen_addr {
TAILQ_ENTRY(listen_addr) entry;
struct sockaddr_storage sa;
int fd;
enum reconf_action reconf;
u_int8_t flags;
};
TAILQ_HEAD(listen_addrs, listen_addr);
SIMPLEQ_HEAD(filter_set_head, filter_set);
struct bgpd_config {
struct filter_set_head connectset;
struct filter_set_head staticset;
struct listen_addrs *listen_addrs;
int opts;
int flags;
int log;
u_int32_t bgpid;
u_int32_t clusterid;
u_int16_t as;
u_int16_t holdtime;
u_int16_t min_holdtime;
};
struct buf_read {
u_char buf[READ_BUF_SIZE];
u_char *rptr;
size_t wpos;
};
enum announce_type {
ANNOUNCE_UNDEF,
ANNOUNCE_SELF,
ANNOUNCE_NONE,
ANNOUNCE_DEFAULT_ROUTE,
ANNOUNCE_ALL
};
enum enforce_as {
ENFORCE_AS_UNDEF,
ENFORCE_AS_OFF,
ENFORCE_AS_ON
};
enum auth_method {
AUTH_NONE,
AUTH_MD5SIG,
AUTH_IPSEC_MANUAL_ESP,
AUTH_IPSEC_MANUAL_AH,
AUTH_IPSEC_IKE_ESP,
AUTH_IPSEC_IKE_AH
};
struct peer_auth {
char md5key[TCP_MD5_KEY_LEN];
char auth_key_in[IPSEC_AUTH_KEY_LEN];
char auth_key_out[IPSEC_AUTH_KEY_LEN];
char enc_key_in[IPSEC_ENC_KEY_LEN];
char enc_key_out[IPSEC_ENC_KEY_LEN];
u_int32_t spi_in;
u_int32_t spi_out;
enum auth_method method;
u_int8_t md5key_len;
u_int8_t auth_alg_in;
u_int8_t auth_alg_out;
u_int8_t auth_keylen_in;
u_int8_t auth_keylen_out;
u_int8_t enc_alg_in;
u_int8_t enc_alg_out;
u_int8_t enc_keylen_in;
u_int8_t enc_keylen_out;
};
struct capabilities {
u_int8_t mp_v4; /* multiprotocol extensions, RFC 2858 */
u_int8_t mp_v6;
u_int8_t refresh; /* route refresh, RFC 2918 */
};
struct peer_config {
struct bgpd_addr remote_addr;
struct bgpd_addr local_addr;
struct peer_auth auth;
struct capabilities capabilities;
struct filter_set_head attrset;
char group[PEER_DESCR_LEN];
char descr[PEER_DESCR_LEN];
char if_depend[IFNAMSIZ];
u_int32_t id;
u_int32_t groupid;
u_int32_t max_prefix;
enum announce_type announce_type;
enum enforce_as enforce_as;
enum reconf_action reconf_action;
u_int16_t remote_as;
u_int16_t holdtime;
u_int16_t min_holdtime;
u_int8_t template;
u_int8_t remote_masklen;
u_int8_t cloned;
u_int8_t ebgp; /* 1 = ebgp, 0 = ibgp */
u_int8_t distance; /* 1 = direct, >1 = multihop */
u_int8_t passive;
u_int8_t announce_capa;
u_int8_t reflector_client;
};
struct network_config {
struct bgpd_addr prefix;
struct filter_set_head attrset;
u_int8_t prefixlen;
};
TAILQ_HEAD(network_head, network);
struct network {
struct network_config net;
TAILQ_ENTRY(network) entry;
};
/* ipc messages */
#define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
#define MAX_IMSGSIZE 8192
struct imsg_fd {
TAILQ_ENTRY(imsg_fd) entry;
int fd;
};
struct imsgbuf {
TAILQ_HEAD(fds, imsg_fd) fds;
struct buf_read r;
struct msgbuf w;
int fd;
pid_t pid;
};
enum imsg_type {
IMSG_NONE,
IMSG_RECONF_CONF,
IMSG_RECONF_PEER,
IMSG_RECONF_FILTER,
IMSG_RECONF_LISTENER,
IMSG_RECONF_DONE,
IMSG_UPDATE,
IMSG_UPDATE_ERR,
IMSG_SESSION_ADD,
IMSG_SESSION_UP,
IMSG_SESSION_DOWN,
IMSG_MRT_OPEN,
IMSG_MRT_REOPEN,
IMSG_MRT_CLOSE,
IMSG_KROUTE_CHANGE,
IMSG_KROUTE_DELETE,
IMSG_KROUTE6_CHANGE,
IMSG_KROUTE6_DELETE,
IMSG_NEXTHOP_ADD,
IMSG_NEXTHOP_REMOVE,
IMSG_NEXTHOP_UPDATE,
IMSG_PFTABLE_ADD,
IMSG_PFTABLE_REMOVE,
IMSG_PFTABLE_COMMIT,
IMSG_NETWORK_ADD,
IMSG_NETWORK_REMOVE,
IMSG_NETWORK_FLUSH,
IMSG_NETWORK_DONE,
IMSG_FILTER_SET,
IMSG_CTL_SHOW_NEIGHBOR,
IMSG_CTL_END,
IMSG_CTL_RELOAD,
IMSG_CTL_FIB_COUPLE,
IMSG_CTL_FIB_DECOUPLE,
IMSG_CTL_NEIGHBOR_UP,
IMSG_CTL_NEIGHBOR_DOWN,
IMSG_CTL_NEIGHBOR_CLEAR,
IMSG_CTL_KROUTE,
IMSG_CTL_KROUTE6,
IMSG_CTL_KROUTE_ADDR,
IMSG_CTL_SHOW_NEXTHOP,
IMSG_CTL_SHOW_INTERFACE,
IMSG_CTL_SHOW_RIB,
IMSG_CTL_SHOW_RIB_AS,
IMSG_CTL_SHOW_RIB_PREFIX,
IMSG_CTL_SHOW_NETWORK,
IMSG_REFRESH,
IMSG_IFINFO
};
struct imsg_hdr {
u_int32_t peerid;
pid_t pid;
enum imsg_type type;
u_int16_t len;
};
struct imsg {
struct imsg_hdr hdr;
void *data;
};
/* needed for session.h parse prototype */
LIST_HEAD(mrt_head, mrt);
/* error codes and subcodes needed in SE and RDE */
enum err_codes {
ERR_HEADER = 1,
ERR_OPEN,
ERR_UPDATE,
ERR_HOLDTIMEREXPIRED,
ERR_FSM,
ERR_CEASE
};
enum suberr_update {
ERR_UPD_UNSPECIFIC,
ERR_UPD_ATTRLIST,
ERR_UPD_UNKNWN_WK_ATTR,
ERR_UPD_MISSNG_WK_ATTR,
ERR_UPD_ATTRFLAGS,
ERR_UPD_ATTRLEN,
ERR_UPD_ORIGIN,
ERR_UPD_LOOP,
ERR_UPD_NEXTHOP,
ERR_UPD_OPTATTR,
ERR_UPD_NETWORK,
ERR_UPD_ASPATH
};
enum suberr_cease {
ERR_CEASE_MAX_PREFIX = 1,
ERR_CEASE_ADMIN_DOWN,
ERR_CEASE_PEER_UNCONF,
ERR_CEASE_ADMIN_RESET,
ERR_CEASE_CONN_REJECT,
ERR_CEASE_OTHER_CHANGE,
ERR_CEASE_COLLISION,
ERR_CEASE_RSRC_EXHAUST
};
struct kroute {
struct in_addr prefix;
struct in_addr nexthop;
u_int16_t flags;
u_short ifindex;
u_int8_t prefixlen;
};
struct kroute6 {
struct in6_addr prefix;
struct in6_addr nexthop;
u_int16_t flags;
u_short ifindex;
u_int8_t prefixlen;
};
struct kroute_nexthop {
union {
struct kroute kr4;
struct kroute6 kr6;
} kr;
struct bgpd_addr nexthop;
struct bgpd_addr gateway;
u_int8_t valid;
u_int8_t connected;
};
struct kif {
char ifname[IFNAMSIZ];
u_long baudrate;
int flags;
u_short ifindex;
u_int8_t media_type;
u_int8_t link_state;
u_int8_t nh_reachable; /* for nexthop verification */
};
struct session_up {
struct bgpd_addr local_addr;
struct bgpd_addr remote_addr;
struct capabilities capa_announced;
struct capabilities capa_received;
u_int32_t remote_bgpid;
};
struct pftable_msg {
struct bgpd_addr addr;
char pftable[PFTABLE_LEN];
u_int8_t len;
};
struct ctl_show_nexthop {
struct bgpd_addr addr;
u_int8_t valid;
struct kif kif;
};
struct ctl_neighbor {
struct bgpd_addr addr;
char descr[PEER_DESCR_LEN];
};
#define F_RIB_ELIGIBLE 0x01
#define F_RIB_ACTIVE 0x02
#define F_RIB_INTERNAL 0x04
#define F_RIB_ANNOUNCE 0x08
struct ctl_show_rib {
struct bgpd_addr nexthop;
struct bgpd_addr prefix;
time_t lastchange;
u_int32_t local_pref;
u_int32_t med;
u_int16_t prefix_cnt;
u_int16_t active_cnt;
u_int16_t aspath_len;
u_int8_t prefixlen;
u_int8_t origin;
u_int8_t flags;
/* plus a aspath_len bytes long aspath */
};
struct ctl_show_rib_prefix {
struct bgpd_addr prefix;
time_t lastchange;
u_int8_t prefixlen;
u_int8_t flags;
};
enum as_spec {
AS_NONE,
AS_ALL,
AS_SOURCE,
AS_TRANSIT,
AS_EMPTY
};
struct filter_as {
enum as_spec type;
u_int16_t as;
};
enum filter_actions {
ACTION_NONE,
ACTION_ALLOW,
ACTION_DENY
};
enum directions {
DIR_IN = 1,
DIR_OUT,
DIR_DEFAULT_IN, /* only needed to apply default set */
DIR_DEFAULT_OUT
};
enum from_spec {
FROM_ALL,
FROM_ADDRESS,
FROM_DESCR,
FROM_GROUP
};
enum comp_ops {
OP_NONE,
OP_RANGE,
OP_XRANGE,
OP_EQ,
OP_NE,
OP_LE,
OP_LT,
OP_GE,
OP_GT
};
struct filter_peers {
u_int32_t peerid;
u_int32_t groupid;
};
/* special community type */
#define COMMUNITY_ERROR -1
#define COMMUNITY_ANY -2
#define COMMUNITY_WELLKNOWN 0xffff
#define COMMUNITY_NO_EXPORT 0xff01
#define COMMUNITY_NO_ADVERTISE 0xff02
#define COMMUNITY_NO_EXPSUBCONFED 0xff03
#define COMMUNITY_NO_PEER 0xff04 /* rfc3765 */
struct filter_prefix {
struct bgpd_addr addr;
u_int8_t len;
};
struct filter_prefixlen {
enum comp_ops op;
sa_family_t af;
u_int8_t len_min;
u_int8_t len_max;
};
struct filter_community {
int as;
int type;
};
struct filter_match {
struct filter_prefix prefix;
struct filter_prefixlen prefixlen;
struct filter_as as;
struct filter_community community;
};
TAILQ_HEAD(filter_head, filter_rule);
struct filter_rule {
TAILQ_ENTRY(filter_rule) entry;
struct filter_peers peer;
struct filter_match match;
struct filter_set_head set;
enum filter_actions action;
enum directions dir;
u_int8_t quick;
};
enum action_types {
ACTION_SET_LOCALPREF,
ACTION_SET_RELATIVE_LOCALPREF,
ACTION_SET_MED,
ACTION_SET_RELATIVE_MED,
ACTION_SET_WEIGHT,
ACTION_SET_RELATIVE_WEIGHT,
ACTION_SET_PREPEND_SELF,
ACTION_SET_PREPEND_PEER,
ACTION_SET_NEXTHOP,
ACTION_SET_NEXTHOP_REJECT,
ACTION_SET_NEXTHOP_BLACKHOLE,
ACTION_SET_NEXTHOP_NOMODIFY,
ACTION_SET_COMMUNITY,
/* ACTION_SCRUB_COMMUNITY, */
ACTION_PFTABLE
};
struct filter_set {
SIMPLEQ_ENTRY(filter_set) entry;
union {
u_int8_t prepend;
u_int32_t metric;
int32_t relative;
struct bgpd_addr nexthop;
struct filter_community community;
char pftable[PFTABLE_LEN];
} action;
enum action_types type;
};
struct rrefresh {
u_int16_t afi;
u_int8_t safi;
};
/* Address Family Numbers as per rfc1700 */
#define AFI_IPv4 1
#define AFI_IPv6 2
#define AFI_ALL 0xffff
/* Subsequent Address Family Identifier as per rfc2858 */
#define SAFI_NONE 0x00
#define SAFI_UNICAST 0x01
#define SAFI_MULTICAST 0x02
#define SAFI_BOTH 0x03
#define SAFI_ALL 0xff
/* prototypes */
/* bgpd.c */
void send_nexthop_update(struct kroute_nexthop *);
void send_imsg_session(int, pid_t, void *, u_int16_t);
int bgpd_redistribute(int, struct kroute *, struct kroute6 *);
/* buffer.c */
struct buf *buf_open(size_t);
int buf_add(struct buf *, void *, size_t);
void *buf_reserve(struct buf *, size_t);
int buf_close(struct msgbuf *, struct buf *);
int buf_write(int, struct buf *);
void buf_free(struct buf *);
void msgbuf_init(struct msgbuf *);
void msgbuf_clear(struct msgbuf *);
int msgbuf_write(struct msgbuf *);
int msgbuf_writebound(struct msgbuf *);
int msgbuf_unbounded(struct msgbuf *msgbuf);
/* log.c */
void log_init(int);
void vlog(int, const char *, va_list);
void log_peer_warn(const struct peer_config *, const char *, ...);
void log_peer_warnx(const struct peer_config *, const char *, ...);
void log_warn(const char *, ...);
void log_warnx(const char *, ...);
void log_info(const char *, ...);
void log_debug(const char *, ...);
void fatal(const char *);
void fatalx(const char *);
void fatal_ensure(const char *, int, const char *);
const char *log_addr(const struct bgpd_addr *);
const char *log_in6addr(const struct in6_addr *);
/* parse.y */
int cmdline_symset(char *);
/* config.c */
int check_file_secrecy(int, const char *);
int host(const char *, struct bgpd_addr *, u_int8_t *);
/* imsg.c */
void imsg_init(struct imsgbuf *, int);
int imsg_read(struct imsgbuf *);
int imsg_get(struct imsgbuf *, struct imsg *);
int imsg_compose(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t, int,
void *, u_int16_t);
struct buf *imsg_create(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
u_int16_t);
int imsg_add(struct buf *, void *, u_int16_t);
int imsg_close(struct imsgbuf *, struct buf *);
void imsg_free(struct imsg *);
int imsg_get_fd(struct imsgbuf *);
/* kroute.c */
int kr_init(int);
int kr_change(struct kroute *);
int kr_delete(struct kroute *);
int kr6_change(struct kroute6 *);
int kr6_delete(struct kroute6 *);
void kr_shutdown(void);
void kr_fib_couple(void);
void kr_fib_decouple(void);
int kr_dispatch_msg(void);
int kr_nexthop_add(struct bgpd_addr *);
void kr_nexthop_delete(struct bgpd_addr *);
void kr_show_route(struct imsg *);
void kr_ifinfo(char *);
int kr_redist_reload(void);
in_addr_t prefixlen2mask(u_int8_t);
struct in6_addr *prefixlen2mask6(u_int8_t prefixlen);
void inet6applymask(struct in6_addr *, const struct in6_addr *,
int);
/* control.c */
int control_init(void);
void control_cleanup(void);
int control_imsg_relay(struct imsg *);
/* pftable.c */
int pftable_exists(const char *);
int pftable_add(const char *);
int pftable_clear_all(void);
int pftable_addr_add(struct pftable_msg *);
int pftable_addr_remove(struct pftable_msg *);
int pftable_commit(void);
#endif /* __BGPD_H__ */
|