summaryrefslogtreecommitdiff
path: root/bgpd/bgpd.h
blob: aacbd3a4c104ffb8d77d871fade662292f6a247b (plain)
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
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
/* BGP message definition header.
   Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro

This file is part of GNU Zebra.

GNU Zebra is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

GNU Zebra is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Zebra; see the file COPYING.  If not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

#ifndef _QUAGGA_BGPD_H
#define _QUAGGA_BGPD_H

/* For union sockunion.  */
#include "sockunion.h"

/* Typedef BGP specific types.  */
typedef u_int16_t as_t;
typedef u_int16_t bgp_size_t;

/* BGP master for system wide configurations and variables.  */
struct bgp_master
{
  /* BGP instance list.  */
  struct list *bgp;

  /* BGP thread master.  */
  struct thread_master *master;

  /* work queues */
  struct work_queue *process_main_queue;
  struct work_queue *process_rsclient_queue;
  struct work_queue *clear_node_queue;
  
  /* BGP port number.  */
  u_int16_t port;

  /* BGP start time.  */
  time_t start_time;

  /* Various BGP global configuration.  */
  u_char options;
#define BGP_OPT_NO_FIB                   (1 << 0)
#define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
#define BGP_OPT_CONFIG_CISCO             (1 << 2)
};

/* BGP instance structure.  */
struct bgp 
{
  /* AS number of this BGP instance.  */
  as_t as;

  /* Name of this BGP instance.  */
  char *name;
  
  /* Self peer.  */
  struct peer *peer_self;

  /* BGP peer. */
  struct list *peer;

  /* BGP peer group.  */
  struct list *group;

  /* BGP route-server-clients. */
  struct list *rsclient;

  /* BGP configuration.  */
  u_int16_t config;
#define BGP_CONFIG_ROUTER_ID              (1 << 0)
#define BGP_CONFIG_CLUSTER_ID             (1 << 1)
#define BGP_CONFIG_CONFEDERATION          (1 << 2)

  /* BGP router identifier.  */
  struct in_addr router_id;
  struct in_addr router_id_static;

  /* BGP route reflector cluster ID.  */
  struct in_addr cluster_id;

  /* BGP confederation information.  */
  as_t confed_id;
  as_t *confed_peers;
  int confed_peers_cnt;

  /* BGP flags. */
  u_int16_t flags;
#define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
#define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
#define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
#define BGP_FLAG_MED_CONFED               (1 << 3)
#define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
#define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
#define BGP_FLAG_ENFORCE_FIRST_AS         (1 << 6)
#define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
#define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
#define BGP_FLAG_IMPORT_CHECK             (1 << 9)
#define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
#define BGP_FLAG_LOG_NEIGHBOR_CHANGES     (1 << 11)
#define BGP_FLAG_GRACEFUL_RESTART         (1 << 12)
#define BGP_FLAG_ASPATH_CONFED            (1 << 13)

  /* BGP Per AF flags */
  u_int16_t af_flags[AFI_MAX][SAFI_MAX];
#define BGP_CONFIG_DAMPENING              (1 << 0)

  /* Static route configuration.  */
  struct bgp_table *route[AFI_MAX][SAFI_MAX];

  /* Aggregate address configuration.  */
  struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];

  /* BGP routing information base.  */
  struct bgp_table *rib[AFI_MAX][SAFI_MAX];

  /* BGP redistribute configuration. */
  u_char redist[AFI_MAX][ZEBRA_ROUTE_MAX];

  /* BGP redistribute metric configuration. */
  u_char redist_metric_flag[AFI_MAX][ZEBRA_ROUTE_MAX];
  u_int32_t redist_metric[AFI_MAX][ZEBRA_ROUTE_MAX];

  /* BGP redistribute route-map.  */
  struct
  {
    char *name;
    struct route_map *map;
  } rmap[AFI_MAX][ZEBRA_ROUTE_MAX];

  /* BGP distance configuration.  */
  u_char distance_ebgp;
  u_char distance_ibgp;
  u_char distance_local;
  
  /* BGP default local-preference.  */
  u_int32_t default_local_pref;

  /* BGP default timer.  */
  u_int32_t default_holdtime;
  u_int32_t default_keepalive;

  /* BGP graceful restart */
  u_int32_t restart_time;
  u_int32_t stalepath_time;
};

/* BGP peer-group support. */
struct peer_group
{
  /* Name of the peer-group. */
  char *name;

  /* Pointer to BGP.  */
  struct bgp *bgp;
  
  /* Peer-group client list. */
  struct list *peer;

  /* Peer-group config */
  struct peer *conf;
};

/* BGP Notify message format. */
struct bgp_notify 
{
  u_char code;
  u_char subcode;
  char *data;
  bgp_size_t length;
};

/* Next hop self address. */
struct bgp_nexthop
{
  struct interface *ifp;
  struct in_addr v4;
#ifdef HAVE_IPV6
  struct in6_addr v6_global;
  struct in6_addr v6_local;
#endif /* HAVE_IPV6 */  
};

/* BGP router distinguisher value.  */
#define BGP_RD_SIZE                8

struct bgp_rd
{
  u_char val[BGP_RD_SIZE];
};

#define RMAP_IN           0
#define RMAP_OUT        1
#define RMAP_IMPORT   2
#define RMAP_EXPORT   3
#define RMAP_MAX        4

/* BGP filter structure. */
struct bgp_filter
{
  /* Distribute-list.  */
  struct 
  {
    char *name;
    struct access_list *alist;
  } dlist[FILTER_MAX];

  /* Prefix-list.  */
  struct
  {
    char *name;
    struct prefix_list *plist;
  } plist[FILTER_MAX];

  /* Filter-list.  */
  struct
  {
    char *name;
    struct as_list *aslist;
  } aslist[FILTER_MAX];

  /* Route-map.  */
  struct
  {
    char *name;
    struct route_map *map;
  } map[RMAP_MAX];

  /* Unsuppress-map.  */
  struct
  {
    char *name;
    struct route_map *map;
  } usmap;
};

/* BGP neighbor structure. */
struct peer
{
  /* BGP structure.  */
  struct bgp *bgp;

  /* reference count, primarily to allow bgp_process'ing of route_node's
   * to be done after a struct peer is deleted.
   *
   * named 'lock' for hysterical reasons within Quagga.
   */
  int lock;

  /* BGP peer group.  */
  struct peer_group *group;
  u_char af_group[AFI_MAX][SAFI_MAX];

  /* Peer's remote AS number. */
  as_t as;			

  /* Peer's local AS number. */
  as_t local_as;

  /* Peer's Change local AS number. */
  as_t change_local_as;

  /* Remote router ID. */
  struct in_addr remote_id;

  /* Local router ID. */
  struct in_addr local_id;

  /* Peer specific RIB when configured as route-server-client. */
  struct bgp_table *rib[AFI_MAX][SAFI_MAX];

  /* Packet receive and send buffer. */
  struct stream *ibuf;
  struct stream_fifo *obuf;
  struct stream *work;

  /* Status of the peer. */
  int status;
  int ostatus;

  /* Peer information */
  int fd;			/* File descriptor */
  int ttl;			/* TTL of TCP connection to the peer. */
  char *desc;			/* Description of the peer. */
  unsigned short port;          /* Destination port for peer */
  char *host;			/* Printable address of the peer. */
  union sockunion su;		/* Sockunion address of the peer. */
  time_t uptime;		/* Last Up/Down time */
  time_t readtime;		/* Last read time */
  time_t resettime;		/* Last reset time */
  
  unsigned int ifindex;		/* ifindex of the BGP connection. */
  char *ifname;			/* bind interface name. */
  char *update_if;
  union sockunion *update_source;
  struct zlog *log;

  union sockunion *su_local;	/* Sockunion of local address.  */
  union sockunion *su_remote;	/* Sockunion of remote address.  */
  int shared_network;		/* Is this peer shared same network. */
  struct bgp_nexthop nexthop;	/* Nexthop */

  /* Peer address family configuration. */
  u_char afc[AFI_MAX][SAFI_MAX];
  u_char afc_nego[AFI_MAX][SAFI_MAX];
  u_char afc_adv[AFI_MAX][SAFI_MAX];
  u_char afc_recv[AFI_MAX][SAFI_MAX];

  /* Capability flags (reset in bgp_stop) */
  u_char cap;
#define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
#define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
#define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
#define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
#define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
#define PEER_CAP_RESTART_ADV                (1 << 5) /* restart advertised */
#define PEER_CAP_RESTART_RCV                (1 << 6) /* restart received */

  /* Capability flags (reset in bgp_stop) */
  u_int16_t af_cap[AFI_MAX][SAFI_MAX];
#define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
#define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
#define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
#define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
#define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
#define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
#define PEER_CAP_RESTART_AF_RCV             (1 << 6) /* graceful restart afi/safi received */
#define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */

  /* Global configuration flags. */
  u_int32_t flags;
#define PEER_FLAG_PASSIVE                   (1 << 0) /* passive mode */
#define PEER_FLAG_SHUTDOWN                  (1 << 1) /* shutdown */
#define PEER_FLAG_DONT_CAPABILITY           (1 << 2) /* dont-capability */
#define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 3) /* override-capability */
#define PEER_FLAG_STRICT_CAP_MATCH          (1 << 4) /* strict-match */
#define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 5) /* dynamic capability */
#define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 6) /* disable-connected-check */
#define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 7) /* local-as no-prepend */

  /* NSF mode (graceful restart) */
  u_char nsf[AFI_MAX][SAFI_MAX];

  /* Per AF configuration flags. */
  u_int32_t af_flags[AFI_MAX][SAFI_MAX];
#define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
#define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
#define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
#define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
#define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
#define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
#define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
#define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
#define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
#define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
#define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
#define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
#define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
#define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
#define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
#define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
#define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED   (1 << 16) /* leave link-local nexthop unchanged */ 

  /* default-originate route-map.  */
  struct
  {
    char *name;
    struct route_map *map;
  } default_rmap[AFI_MAX][SAFI_MAX];

  /* Peer status flags. */
  u_int16_t sflags;
#define PEER_STATUS_ACCEPT_PEER	      (1 << 0) /* accept peer */
#define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
#define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
#define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
#define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
#define PEER_STATUS_NSF_MODE          (1 << 5) /* NSF aware peer */
#define PEER_STATUS_NSF_WAIT          (1 << 6) /* wait comeback peer */

  /* Peer status af flags (reset in bgp_stop) */
  u_int16_t af_sflags[AFI_MAX][SAFI_MAX];
#define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
#define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
#define PEER_STATUS_DEFAULT_ORIGINATE (1 << 2) /* default-originate peer */
#define PEER_STATUS_PREFIX_THRESHOLD  (1 << 3) /* exceed prefix-threshold */
#define PEER_STATUS_PREFIX_LIMIT      (1 << 4) /* exceed prefix-limit */
#define PEER_STATUS_EOR_SEND          (1 << 5) /* end-of-rib send to peer */
#define PEER_STATUS_EOR_RECEIVED      (1 << 6) /* end-of-rib received from peer */


  /* Default attribute value for the peer. */
  u_int32_t config;
#define PEER_CONFIG_WEIGHT            (1 << 0) /* Default weight. */
#define PEER_CONFIG_TIMER             (1 << 1) /* keepalive & holdtime */
#define PEER_CONFIG_CONNECT           (1 << 2) /* connect */
#define PEER_CONFIG_ROUTEADV          (1 << 3) /* route advertise */
  u_int32_t weight;
  u_int32_t holdtime;
  u_int32_t keepalive;
  u_int32_t connect;
  u_int32_t routeadv;

  /* Timer values. */
  u_int32_t v_start;
  u_int32_t v_connect;
  u_int32_t v_holdtime;
  u_int32_t v_keepalive;
  u_int32_t v_asorig;
  u_int32_t v_routeadv;
  u_int32_t v_pmax_restart;
  u_int32_t v_gr_restart;

  /* Threads. */
  struct thread *t_read;
  struct thread *t_write;
  struct thread *t_start;
  struct thread *t_connect;
  struct thread *t_holdtime;
  struct thread *t_keepalive;
  struct thread *t_asorig;
  struct thread *t_routeadv;
  struct thread *t_pmax_restart;
  struct thread *t_gr_restart;
  struct thread *t_gr_stale;

  /* Statistics field */
  u_int32_t open_in;		/* Open message input count */
  u_int32_t open_out;		/* Open message output count */
  u_int32_t update_in;		/* Update message input count */
  u_int32_t update_out;		/* Update message ouput count */
  time_t update_time;		/* Update message received time. */
  u_int32_t keepalive_in;	/* Keepalive input count */
  u_int32_t keepalive_out;	/* Keepalive output count */
  u_int32_t notify_in;		/* Notify input count */
  u_int32_t notify_out;		/* Notify output count */
  u_int32_t refresh_in;		/* Route Refresh input count */
  u_int32_t refresh_out;	/* Route Refresh output count */
  u_int32_t dynamic_cap_in;	/* Dynamic Capability input count.  */
  u_int32_t dynamic_cap_out;	/* Dynamic Capability output count.  */

  /* BGP state count */
  u_int32_t established;	/* Established */
  u_int32_t dropped;		/* Dropped */

  /* Syncronization list and time.  */
  struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
  time_t synctime;

  /* Send prefix count. */
  unsigned long scount[AFI_MAX][SAFI_MAX];

  /* Announcement attribute hash.  */
  struct hash *hash[AFI_MAX][SAFI_MAX];

  /* Notify data. */
  struct bgp_notify notify;

  /* Whole packet size to be read. */
  unsigned long packet_size;

  /* Filter structure. */
  struct bgp_filter filter[AFI_MAX][SAFI_MAX];

  /* ORF Prefix-list */
  struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];

  /* Prefix count. */
  unsigned long pcount[AFI_MAX][SAFI_MAX];

  /* Max prefix count. */
  unsigned long pmax[AFI_MAX][SAFI_MAX];
  u_char pmax_threshold[AFI_MAX][SAFI_MAX];
  u_int16_t pmax_restart[AFI_MAX][SAFI_MAX];
#define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75

  /* allowas-in. */
  char allowas_in[AFI_MAX][SAFI_MAX];

  /* peer reset cause */
  char last_reset;
#define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
#define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
#define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
#define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
#define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
#define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
#define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
#define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
#define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
#define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
#define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
#define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
#define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
#define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
#define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
#define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
#define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
#define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
#define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
#define PEER_DOWN_PASSIVE_CHANGE        20 /* neighbor passive command */
#define PEER_DOWN_MULTIHOP_CHANGE       21 /* neighbor multihop command */
#define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */

  /* The kind of route-map Flags.*/
  u_char rmap_type;
#define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
#define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
#define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
#define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
#define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
#define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */
#define PEER_RMAP_TYPE_IMPORT         (1 << 6) /* neighbor route-map import */
#define PEER_RMAP_TYPE_EXPORT         (1 << 7) /* neighbor route-map export */
};

/* This structure's member directly points incoming packet data
   stream. */
struct bgp_nlri
{
  /* AFI.  */
  afi_t afi;

  /* SAFI.  */
  safi_t safi;

  /* Pointer to NLRI byte stream.  */
  u_char *nlri;

  /* Length of whole NLRI.  */
  bgp_size_t length;
};

/* BGP versions.  */
#define BGP_VERSION_4		                 4

/* Default BGP port number.  */
#define BGP_PORT_DEFAULT                       179

/* BGP message header and packet size.  */
#define BGP_MARKER_SIZE		                16
#define BGP_HEADER_SIZE		                19
#define BGP_MAX_PACKET_SIZE                   4096

/* BGP minimum message size.  */
#define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
#define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
#define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
#define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
#define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
#define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)

/* BGP message types.  */
#define	BGP_MSG_OPEN		                 1
#define	BGP_MSG_UPDATE		                 2
#define	BGP_MSG_NOTIFY		                 3
#define	BGP_MSG_KEEPALIVE	                 4
#define BGP_MSG_ROUTE_REFRESH_NEW                5
#define BGP_MSG_CAPABILITY                       6
#define BGP_MSG_ROUTE_REFRESH_OLD              128

/* BGP open optional parameter.  */
#define BGP_OPEN_OPT_AUTH                        1
#define BGP_OPEN_OPT_CAP                         2

/* BGP4 attribute type codes.  */
#define BGP_ATTR_ORIGIN                          1
#define BGP_ATTR_AS_PATH                         2
#define BGP_ATTR_NEXT_HOP                        3
#define BGP_ATTR_MULTI_EXIT_DISC                 4
#define BGP_ATTR_LOCAL_PREF                      5
#define BGP_ATTR_ATOMIC_AGGREGATE                6
#define BGP_ATTR_AGGREGATOR                      7
#define BGP_ATTR_COMMUNITIES                     8
#define BGP_ATTR_ORIGINATOR_ID                   9
#define BGP_ATTR_CLUSTER_LIST                   10
#define BGP_ATTR_DPA                            11
#define BGP_ATTR_ADVERTISER                     12
#define BGP_ATTR_RCID_PATH                      13
#define BGP_ATTR_MP_REACH_NLRI                  14
#define BGP_ATTR_MP_UNREACH_NLRI                15
#define BGP_ATTR_EXT_COMMUNITIES                16

/* BGP update origin.  */
#define BGP_ORIGIN_IGP                           0
#define BGP_ORIGIN_EGP                           1
#define BGP_ORIGIN_INCOMPLETE                    2

/* BGP notify message codes.  */
#define BGP_NOTIFY_HEADER_ERR                    1
#define BGP_NOTIFY_OPEN_ERR                      2
#define BGP_NOTIFY_UPDATE_ERR                    3
#define BGP_NOTIFY_HOLD_ERR                      4
#define BGP_NOTIFY_FSM_ERR                       5
#define BGP_NOTIFY_CEASE                         6
#define BGP_NOTIFY_CAPABILITY_ERR                7
#define BGP_NOTIFY_MAX	                         8

/* BGP_NOTIFY_HEADER_ERR sub codes.  */
#define BGP_NOTIFY_HEADER_NOT_SYNC               1
#define BGP_NOTIFY_HEADER_BAD_MESLEN             2
#define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
#define BGP_NOTIFY_HEADER_MAX                    4

/* BGP_NOTIFY_OPEN_ERR sub codes.  */
#define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
#define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
#define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
#define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
#define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
#define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
#define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
#define BGP_NOTIFY_OPEN_MAX                      8

/* BGP_NOTIFY_UPDATE_ERR sub codes.  */
#define BGP_NOTIFY_UPDATE_MAL_ATTR               1
#define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
#define BGP_NOTIFY_UPDATE_MISS_ATTR              3
#define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
#define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
#define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
#define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
#define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
#define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
#define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
#define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
#define BGP_NOTIFY_UPDATE_MAX                   12

/* BGP_NOTIFY_CEASE sub codes (draft-ietf-idr-cease-subcode-05).  */
#define BGP_NOTIFY_CEASE_MAX_PREFIX              1
#define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
#define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
#define BGP_NOTIFY_CEASE_ADMIN_RESET             4
#define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
#define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
#define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION    7
#define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
#define BGP_NOTIFY_CEASE_MAX                     9

/* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
#define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
#define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
#define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
#define BGP_NOTIFY_CAPABILITY_MAX                4

/* BGP finite state machine status.  */
#define Idle                                     1
#define Connect                                  2
#define Active                                   3
#define OpenSent                                 4
#define OpenConfirm                              5
#define Established                              6
#define BGP_STATUS_MAX                           7

/* BGP finite state machine events.  */
#define BGP_Start                                1
#define BGP_Stop                                 2
#define TCP_connection_open                      3
#define TCP_connection_closed                    4
#define TCP_connection_open_failed               5
#define TCP_fatal_error                          6
#define ConnectRetry_timer_expired               7
#define Hold_Timer_expired                       8
#define KeepAlive_timer_expired                  9
#define Receive_OPEN_message                    10
#define Receive_KEEPALIVE_message               11
#define Receive_UPDATE_message                  12
#define Receive_NOTIFICATION_message            13
#define BGP_EVENTS_MAX                          14

/* BGP timers default value.  */
#define BGP_INIT_START_TIMER                     5
#define BGP_ERROR_START_TIMER                   30
#define BGP_DEFAULT_HOLDTIME                   180
#define BGP_DEFAULT_KEEPALIVE                   60 
#define BGP_DEFAULT_ASORIGINATE                 15
#define BGP_DEFAULT_EBGP_ROUTEADV               30
#define BGP_DEFAULT_IBGP_ROUTEADV                5
#define BGP_CLEAR_CONNECT_RETRY                 20
#define BGP_DEFAULT_CONNECT_RETRY              120

/* BGP default local preference.  */
#define BGP_DEFAULT_LOCAL_PREF                 100

/* BGP graceful restart  */
#define BGP_DEFAULT_RESTART_TIME               120
#define BGP_DEFAULT_STALEPATH_TIME             360

/* SAFI which used in open capability negotiation.  */
#define BGP_SAFI_VPNV4                         128
#define BGP_SAFI_VPNV6                         129

/* Max TTL value.  */
#define TTL_MAX                                255

/* BGP uptime string length.  */
#define BGP_UPTIME_LEN 25

/* Default configuration settings for bgpd.  */
#define BGP_VTY_PORT                          2605
#define BGP_DEFAULT_CONFIG             "bgpd.conf"

/* Check AS path loop when we send NLRI.  */
/* #define BGP_SEND_ASPATH_CHECK */

/* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
   a peer who's AS is part of our Confederation.  */
enum
{
  BGP_PEER_IBGP,
  BGP_PEER_EBGP,
  BGP_PEER_INTERNAL,
  BGP_PEER_CONFED
};

/* Flag for peer_clear_soft().  */
enum bgp_clear_type
{
  BGP_CLEAR_SOFT_NONE,
  BGP_CLEAR_SOFT_OUT,
  BGP_CLEAR_SOFT_IN,
  BGP_CLEAR_SOFT_BOTH,
  BGP_CLEAR_SOFT_IN_ORF_PREFIX,
  BGP_CLEAR_SOFT_RSCLIENT
};

/* Macros. */
#define BGP_INPUT(P)         ((P)->ibuf)
#define BGP_INPUT_PNT(P)     (STREAM_PNT(BGP_INPUT(P)))

/* Macro to check BGP information is alive or not.  */
#define BGP_INFO_HOLDDOWN(BI)                         \
  (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID)         \
   || CHECK_FLAG ((BI)->flags, BGP_INFO_HISTORY)      \
   || CHECK_FLAG ((BI)->flags, BGP_INFO_DAMPED))

/* Count prefix size from mask length */
#define PSIZE(a) (((a) + 7) / (8))

/* BGP error codes.  */
#define BGP_SUCCESS                               0
#define BGP_ERR_INVALID_VALUE                    -1
#define BGP_ERR_INVALID_FLAG                     -2
#define BGP_ERR_INVALID_AS                       -3
#define BGP_ERR_INVALID_BGP                      -4
#define BGP_ERR_PEER_GROUP_MEMBER                -5
#define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
#define BGP_ERR_PEER_GROUP_MEMBER_EXISTS         -7
#define BGP_ERR_PEER_BELONGS_TO_GROUP            -8
#define BGP_ERR_PEER_GROUP_AF_UNCONFIGURED       -9
#define BGP_ERR_PEER_GROUP_NO_REMOTE_AS         -10
#define BGP_ERR_PEER_GROUP_CANT_CHANGE          -11
#define BGP_ERR_PEER_GROUP_MISMATCH             -12
#define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -13
#define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -14
#define BGP_ERR_AS_MISMATCH                     -15
#define BGP_ERR_PEER_INACTIVE                   -16
#define BGP_ERR_INVALID_FOR_PEER_GROUP_MEMBER   -17
#define BGP_ERR_PEER_GROUP_HAS_THE_FLAG         -18
#define BGP_ERR_PEER_FLAG_CONFLICT              -19
#define BGP_ERR_PEER_GROUP_SHUTDOWN             -20
#define BGP_ERR_PEER_FILTER_CONFLICT            -21
#define BGP_ERR_NOT_INTERNAL_PEER               -22
#define BGP_ERR_REMOVE_PRIVATE_AS               -23
#define BGP_ERR_AF_UNCONFIGURED                 -24
#define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -25
#define BGP_ERR_INSTANCE_MISMATCH               -26
#define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -27
#define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -28
#define BGP_ERR_MAX                             -29

extern struct bgp_master *bm;

extern struct thread_master *master;

/* Prototypes. */
void bgp_terminate (void);
void bgp_reset (void);
void bgp_zclient_reset ();
int bgp_nexthop_set (union sockunion *, union sockunion *, 
		     struct bgp_nexthop *, struct peer *);
struct bgp *bgp_get_default ();
struct bgp *bgp_lookup (as_t, const char *);
struct bgp *bgp_lookup_by_name (const char *);
struct peer *peer_lookup (struct bgp *, union sockunion *);
struct peer_group *peer_group_lookup (struct bgp *, const char *);
struct peer_group *peer_group_get (struct bgp *, const char *);
struct peer *peer_lookup_with_open (union sockunion *, as_t, struct in_addr *,
				    int *);
extern struct peer *peer_lock (struct peer *);
extern struct peer *peer_unlock (struct peer *);
int peer_sort (struct peer *peer);
int peer_active (struct peer *);
int peer_active_nego (struct peer *);
struct peer *peer_create_accept (struct bgp *);
char *peer_uptime (time_t, char *, size_t);
void bgp_config_write_family_header (struct vty *, afi_t, safi_t, int *);

void bgp_master_init ();

void bgp_init ();

int bgp_option_set (int);
int bgp_option_unset (int);
int bgp_option_check (int);

int bgp_get (struct bgp **, as_t *, const char *);
int bgp_delete (struct bgp *);

int bgp_flag_set (struct bgp *, int);
int bgp_flag_unset (struct bgp *, int);
int bgp_flag_check (struct bgp *, int);

int bgp_router_id_set (struct bgp *, struct in_addr *);
int bgp_router_id_unset (struct bgp *);

int bgp_cluster_id_set (struct bgp *, struct in_addr *);
int bgp_cluster_id_unset (struct bgp *);

int bgp_confederation_id_set (struct bgp *, as_t);
int bgp_confederation_id_unset (struct bgp *);
int bgp_confederation_peers_check (struct bgp *, as_t);

int bgp_confederation_peers_add (struct bgp *, as_t);
int bgp_confederation_peers_remove (struct bgp *, as_t);

int bgp_timers_set (struct bgp *, u_int32_t, u_int32_t);
int bgp_timers_unset (struct bgp *);

int bgp_default_local_preference_set (struct bgp *, u_int32_t);
int bgp_default_local_preference_unset (struct bgp *);

int peer_rsclient_active (struct peer *);

int peer_remote_as (struct bgp *, union sockunion *, as_t *, afi_t, safi_t);
int peer_group_remote_as (struct bgp *, const char *, as_t *);
int peer_delete (struct peer *peer);
int peer_group_delete (struct peer_group *);
int peer_group_remote_as_delete (struct peer_group *);

int peer_activate (struct peer *, afi_t, safi_t);
int peer_deactivate (struct peer *, afi_t, safi_t);

int peer_group_bind (struct bgp *, union sockunion *, struct peer_group *,
		     afi_t, safi_t, as_t *);
int peer_group_unbind (struct bgp *, struct peer *, struct peer_group *,
		       afi_t, safi_t);

int peer_flag_set (struct peer *, u_int32_t);
int peer_flag_unset (struct peer *, u_int32_t);

int peer_af_flag_set (struct peer *, afi_t, safi_t, u_int32_t);
int peer_af_flag_unset (struct peer *, afi_t, safi_t, u_int32_t);
int peer_af_flag_check (struct peer *, afi_t, safi_t, u_int32_t);

int peer_ebgp_multihop_set (struct peer *, int);
int peer_ebgp_multihop_unset (struct peer *);

int peer_description_set (struct peer *, char *);
int peer_description_unset (struct peer *);

int peer_update_source_if_set (struct peer *, const char *);
int peer_update_source_addr_set (struct peer *, union sockunion *);
int peer_update_source_unset (struct peer *);

int peer_default_originate_set (struct peer *, afi_t, safi_t, const char *);
int peer_default_originate_unset (struct peer *, afi_t, safi_t);

int peer_port_set (struct peer *, u_int16_t);
int peer_port_unset (struct peer *);

int peer_weight_set (struct peer *, u_int16_t);
int peer_weight_unset (struct peer *);

int peer_timers_set (struct peer *, u_int32_t, u_int32_t);
int peer_timers_unset (struct peer *);

int peer_timers_connect_set (struct peer *, u_int32_t);
int peer_timers_connect_unset (struct peer *);

int peer_advertise_interval_set (struct peer *, u_int32_t);
int peer_advertise_interval_unset (struct peer *);

int peer_interface_set (struct peer *, const char *);
int peer_interface_unset (struct peer *);

int peer_distribute_set (struct peer *, afi_t, safi_t, int, const char *);
int peer_distribute_unset (struct peer *, afi_t, safi_t, int);

int peer_allowas_in_set (struct peer *, afi_t, safi_t, int);
int peer_allowas_in_unset (struct peer *, afi_t, safi_t);

int peer_local_as_set (struct peer *, as_t, int);
int peer_local_as_unset (struct peer *);

int peer_prefix_list_set (struct peer *, afi_t, safi_t, int, const char *);
int peer_prefix_list_unset (struct peer *, afi_t, safi_t, int);

int peer_aslist_set (struct peer *, afi_t, safi_t, int, const char *);
int peer_aslist_unset (struct peer *,afi_t, safi_t, int);

int peer_route_map_set (struct peer *, afi_t, safi_t, int, const char *);
int peer_route_map_unset (struct peer *, afi_t, safi_t, int);

int peer_unsuppress_map_set (struct peer *, afi_t, safi_t, const char *);
int peer_unsuppress_map_unset (struct peer *, afi_t, safi_t);

int peer_maximum_prefix_set (struct peer *, afi_t, safi_t, u_int32_t, u_char, int, u_int16_t);
int peer_maximum_prefix_unset (struct peer *, afi_t, safi_t);

int peer_clear (struct peer *);
int peer_clear_soft (struct peer *, afi_t, safi_t, enum bgp_clear_type);

void peer_nsf_stop (struct peer *);

#endif /* _QUAGGA_BGPD_H */