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1 /* BGP message definition header.
2 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef _QUAGGA_BGPD_H
22 #define _QUAGGA_BGPD_H
23
24 #include "qobj.h"
25 #include <pthread.h>
26
27 #include "lib/json.h"
28 #include "vrf.h"
29 #include "vty.h"
30
31 /* For union sockunion. */
32 #include "queue.h"
33 #include "sockunion.h"
34 #include "routemap.h"
35 #include "linklist.h"
36 #include "defaults.h"
37 #include "bgp_memory.h"
38 #include "bitfield.h"
39 #include "vxlan.h"
40 #include "bgp_labelpool.h"
41
42 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
43 #define BGP_PEER_MAX_HASH_SIZE 16384
44
45 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
46 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
47
48 struct update_subgroup;
49 struct bpacket;
50
51 /*
52 * Allow the neighbor XXXX remote-as to take internal or external
53 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
54 * behavior
55 * in the system.
56 */
57 enum { AS_UNSPECIFIED = 0,
58 AS_SPECIFIED,
59 AS_INTERNAL,
60 AS_EXTERNAL,
61 };
62
63 /* Typedef BGP specific types. */
64 typedef uint32_t as_t;
65 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
66 typedef uint16_t bgp_size_t;
67
68 #define max(a, b) \
69 ({ \
70 __typeof__(a) _a = (a); \
71 __typeof__(b) _b = (b); \
72 _a > _b ? _a : _b; \
73 })
74
75 enum bgp_af_index {
76 BGP_AF_START,
77 BGP_AF_IPV4_UNICAST = BGP_AF_START,
78 BGP_AF_IPV4_MULTICAST,
79 BGP_AF_IPV4_VPN,
80 BGP_AF_IPV6_UNICAST,
81 BGP_AF_IPV6_MULTICAST,
82 BGP_AF_IPV6_VPN,
83 BGP_AF_IPV4_ENCAP,
84 BGP_AF_IPV6_ENCAP,
85 BGP_AF_L2VPN_EVPN,
86 BGP_AF_IPV4_LBL_UNICAST,
87 BGP_AF_IPV6_LBL_UNICAST,
88 BGP_AF_IPV4_FLOWSPEC,
89 BGP_AF_IPV6_FLOWSPEC,
90 BGP_AF_MAX
91 };
92
93 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
94
95 #define FOREACH_AFI_SAFI(afi, safi) \
96 for (afi = AFI_IP; afi < AFI_MAX; afi++) \
97 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
98
99 /* BGP master for system wide configurations and variables. */
100 struct bgp_master {
101 /* BGP instance list. */
102 struct list *bgp;
103
104 /* BGP thread master. */
105 struct thread_master *master;
106
107 /* BGP pthreads. */
108 #define PTHREAD_IO (1 << 1)
109 #define PTHREAD_KEEPALIVES (1 << 2)
110
111 /* work queues */
112 struct work_queue *process_main_queue;
113
114 /* Listening sockets */
115 struct list *listen_sockets;
116
117 /* BGP port number. */
118 uint16_t port;
119
120 /* Listener address */
121 char *address;
122
123 /* BGP start time. */
124 time_t start_time;
125
126 /* Various BGP global configuration. */
127 uint8_t options;
128 #define BGP_OPT_NO_FIB (1 << 0)
129 #define BGP_OPT_MULTIPLE_INSTANCE (1 << 1)
130 #define BGP_OPT_CONFIG_CISCO (1 << 2)
131 #define BGP_OPT_NO_LISTEN (1 << 3)
132
133 uint64_t updgrp_idspace;
134 uint64_t subgrp_idspace;
135
136 /* timer to dampen route map changes */
137 struct thread *t_rmap_update; /* Handle route map updates */
138 uint32_t rmap_update_timer; /* Route map update timer */
139 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
140
141 /* Id space for automatic RD derivation for an EVI/VRF */
142 bitfield_t rd_idspace;
143
144 /* dynamic mpls label allocation pool */
145 struct labelpool labelpool;
146
147 QOBJ_FIELDS
148 };
149 DECLARE_QOBJ_TYPE(bgp_master)
150
151 /* BGP route-map structure. */
152 struct bgp_rmap {
153 char *name;
154 struct route_map *map;
155 };
156
157 struct bgp_redist {
158 unsigned short instance;
159
160 /* BGP redistribute metric configuration. */
161 uint8_t redist_metric_flag;
162 uint32_t redist_metric;
163
164 /* BGP redistribute route-map. */
165 struct bgp_rmap rmap;
166 };
167
168 typedef enum {
169 BGP_VPN_POLICY_DIR_FROMVPN = 0,
170 BGP_VPN_POLICY_DIR_TOVPN = 1,
171 BGP_VPN_POLICY_DIR_MAX = 2
172 } vpn_policy_direction_t;
173
174 struct vpn_policy {
175 struct bgp *bgp; /* parent */
176 afi_t afi;
177 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
178 struct ecommunity *import_redirect_rtlist;
179 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
180 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
181
182 /* should be mpls_label_t? */
183 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
184 uint32_t tovpn_zebra_vrf_label_last_sent;
185 struct prefix_rd tovpn_rd;
186 struct prefix tovpn_nexthop; /* unset => set to 0 */
187 uint32_t flags;
188 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
189 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
190 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
191
192 /* If we are importing a vrf -> vrf keep a list of vrf names */
193 struct list *import_vrf;
194 struct list *export_vrf;
195 };
196
197 /*
198 * Type of 'struct bgp'.
199 * - Default: The default instance
200 * - VRF: A specific (non-default) VRF
201 * - View: An instance used for route exchange
202 * The "default" instance is treated separately to simplify the code. Note
203 * that if deployed in a Multi-VRF environment, it may not exist.
204 */
205 enum bgp_instance_type {
206 BGP_INSTANCE_TYPE_DEFAULT,
207 BGP_INSTANCE_TYPE_VRF,
208 BGP_INSTANCE_TYPE_VIEW
209 };
210
211 /* BGP instance structure. */
212 struct bgp {
213 /* AS number of this BGP instance. */
214 as_t as;
215
216 /* Name of this BGP instance. */
217 char *name;
218 char *name_pretty; /* printable "VRF|VIEW name|default" */
219
220 /* Type of instance and VRF id. */
221 enum bgp_instance_type inst_type;
222 vrf_id_t vrf_id;
223
224 /* Reference count to allow peer_delete to finish after bgp_delete */
225 int lock;
226
227 /* Self peer. */
228 struct peer *peer_self;
229
230 /* BGP peer. */
231 struct list *peer;
232 struct hash *peerhash;
233
234 /* BGP peer group. */
235 struct list *group;
236
237 /* The maximum number of BGP dynamic neighbors that can be created */
238 int dynamic_neighbors_limit;
239
240 /* The current number of BGP dynamic neighbors */
241 int dynamic_neighbors_count;
242
243 struct hash *update_groups[BGP_AF_MAX];
244
245 /*
246 * Global statistics for update groups.
247 */
248 struct {
249 uint32_t join_events;
250 uint32_t prune_events;
251 uint32_t merge_events;
252 uint32_t split_events;
253 uint32_t updgrp_switch_events;
254 uint32_t peer_refreshes_combined;
255 uint32_t adj_count;
256 uint32_t merge_checks_triggered;
257
258 uint32_t updgrps_created;
259 uint32_t updgrps_deleted;
260 uint32_t subgrps_created;
261 uint32_t subgrps_deleted;
262 } update_group_stats;
263
264 /* BGP configuration. */
265 uint16_t config;
266 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
267 #define BGP_CONFIG_CONFEDERATION (1 << 1)
268
269 /* BGP router identifier. */
270 struct in_addr router_id;
271 struct in_addr router_id_static;
272 struct in_addr router_id_zebra;
273
274 /* BGP route reflector cluster ID. */
275 struct in_addr cluster_id;
276
277 /* BGP confederation information. */
278 as_t confed_id;
279 as_t *confed_peers;
280 int confed_peers_cnt;
281
282 struct thread
283 *t_startup; /* start-up timer on only once at the beginning */
284
285 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
286 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
287 uint32_t maxmed_onstartup_value; /* Max-med value when active on
288 start-up */
289 struct thread
290 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
291 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
292
293 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
294 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
295 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
296 */
297 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
298
299 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
300 uint32_t maxmed_value; /* Max-med value when its active */
301
302 /* BGP update delay on startup */
303 struct thread *t_update_delay;
304 struct thread *t_establish_wait;
305 uint8_t update_delay_over;
306 uint8_t main_zebra_update_hold;
307 uint8_t main_peers_update_hold;
308 uint16_t v_update_delay;
309 uint16_t v_establish_wait;
310 char update_delay_begin_time[64];
311 char update_delay_end_time[64];
312 char update_delay_zebra_resume_time[64];
313 char update_delay_peers_resume_time[64];
314 uint32_t established;
315 uint32_t restarted_peers;
316 uint32_t implicit_eors;
317 uint32_t explicit_eors;
318 #define BGP_UPDATE_DELAY_DEF 0
319 #define BGP_UPDATE_DELAY_MIN 0
320 #define BGP_UPDATE_DELAY_MAX 3600
321
322 /* BGP flags. */
323 uint32_t flags;
324 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
325 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
326 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
327 #define BGP_FLAG_MED_CONFED (1 << 3)
328 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
329 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
330 #define BGP_FLAG_ENFORCE_FIRST_AS (1 << 6)
331 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
332 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
333 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
334 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
335 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
336 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
337 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
338 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
339 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
340 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
341 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
342 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
343 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
344 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
345 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
346
347 /* BGP Per AF flags */
348 uint16_t af_flags[AFI_MAX][SAFI_MAX];
349 #define BGP_CONFIG_DAMPENING (1 << 0)
350 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
351 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
352 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
353 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
354 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
355 /* import/export between address families */
356 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
357 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
358 /* vrf-route leaking flags */
359 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
360 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
361
362
363 /* Route table for next-hop lookup cache. */
364 struct bgp_table *nexthop_cache_table[AFI_MAX];
365
366 /* Route table for import-check */
367 struct bgp_table *import_check_table[AFI_MAX];
368
369 struct bgp_table *connected_table[AFI_MAX];
370
371 struct hash *address_hash;
372
373 /* DB for all local tunnel-ips - used mainly for martian checks
374 Currently it only has all VxLan tunnel IPs*/
375 struct hash *tip_hash;
376
377 /* Static route configuration. */
378 struct bgp_table *route[AFI_MAX][SAFI_MAX];
379
380 /* Aggregate address configuration. */
381 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
382
383 /* BGP routing information base. */
384 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
385
386 /* BGP table route-map. */
387 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
388
389 /* BGP redistribute configuration. */
390 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
391
392 /* Allocate MPLS labels */
393 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
394
395 /* timer to re-evaluate neighbor default-originate route-maps */
396 struct thread *t_rmap_def_originate_eval;
397 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
398
399 /* BGP distance configuration. */
400 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
401 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
402 uint8_t distance_local[AFI_MAX][SAFI_MAX];
403
404 /* BGP default local-preference. */
405 uint32_t default_local_pref;
406
407 /* BGP default subgroup pkt queue max */
408 uint32_t default_subgroup_pkt_queue_max;
409
410 /* BGP default timer. */
411 uint32_t default_holdtime;
412 uint32_t default_keepalive;
413
414 /* BGP graceful restart */
415 uint32_t restart_time;
416 uint32_t stalepath_time;
417
418 /* Maximum-paths configuration */
419 struct bgp_maxpaths_cfg {
420 uint16_t maxpaths_ebgp;
421 uint16_t maxpaths_ibgp;
422 uint16_t ibgp_flags;
423 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
424 } maxpaths[AFI_MAX][SAFI_MAX];
425
426 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
427 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
428
429 /* Automatic coalesce adjust on/off */
430 bool heuristic_coalesce;
431 /* Actual coalesce time */
432 uint32_t coalesce_time;
433
434 /* Auto-shutdown new peers */
435 bool autoshutdown;
436
437 uint32_t addpath_tx_id;
438 int addpath_tx_used[AFI_MAX][SAFI_MAX];
439
440 #if ENABLE_BGP_VNC
441 struct rfapi_cfg *rfapi_cfg;
442 struct rfapi *rfapi;
443 #endif
444
445 /* EVPN related information */
446
447 /* EVI hash table */
448 struct hash *vnihash;
449
450 /* EVPN enable - advertise gateway macip routes */
451 int advertise_gw_macip;
452
453 /* EVPN enable - advertise local VNIs and their MACs etc. */
454 int advertise_all_vni;
455
456 /* Hash table of Import RTs to EVIs */
457 struct hash *import_rt_hash;
458
459 /* Hash table of VRF import RTs to VRFs */
460 struct hash *vrf_import_rt_hash;
461
462 /* L3-VNI corresponding to this vrf */
463 vni_t l3vni;
464
465 /* router-mac to be used in mac-ip routes for this vrf */
466 struct ethaddr rmac;
467
468 /* originator ip - to be used as NH for type-5 routes */
469 struct in_addr originator_ip;
470
471 /* vrf flags */
472 uint32_t vrf_flags;
473 #define BGP_VRF_AUTO (1 << 0)
474 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
475 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
476 #define BGP_VRF_RD_CFGD (1 << 3)
477 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
478
479
480 /* unique ID for auto derivation of RD for this vrf */
481 uint16_t vrf_rd_id;
482
483 /* RD for this VRF */
484 struct prefix_rd vrf_prd;
485
486 /* import rt list for the vrf instance */
487 struct list *vrf_import_rtl;
488
489 /* export rt list for the vrf instance */
490 struct list *vrf_export_rtl;
491
492 /* list of corresponding l2vnis (struct bgpevpn) */
493 struct list *l2vnis;
494
495 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
496 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
497
498 struct vpn_policy vpn_policy[AFI_MAX];
499
500 QOBJ_FIELDS
501 };
502 DECLARE_QOBJ_TYPE(bgp)
503
504 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
505
506 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
507 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
508 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
509 && bgp->vrf_id != VRF_UNKNOWN))
510
511 /* BGP peer-group support. */
512 struct peer_group {
513 /* Name of the peer-group. */
514 char *name;
515
516 /* Pointer to BGP. */
517 struct bgp *bgp;
518
519 /* Peer-group client list. */
520 struct list *peer;
521
522 /** Dynamic neighbor listening ranges */
523 struct list *listen_range[AFI_MAX];
524
525 /* Peer-group config */
526 struct peer *conf;
527 };
528
529 /* BGP Notify message format. */
530 struct bgp_notify {
531 uint8_t code;
532 uint8_t subcode;
533 char *data;
534 bgp_size_t length;
535 uint8_t *raw_data;
536 };
537
538 /* Next hop self address. */
539 struct bgp_nexthop {
540 struct interface *ifp;
541 struct in_addr v4;
542 struct in6_addr v6_global;
543 struct in6_addr v6_local;
544 };
545
546 /* BGP addpath values */
547 #define BGP_ADDPATH_RX 1
548 #define BGP_ADDPATH_TX 2
549 #define BGP_ADDPATH_ID_LEN 4
550
551 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
552
553 /* BGP router distinguisher value. */
554 #define BGP_RD_SIZE 8
555
556 struct bgp_rd {
557 uint8_t val[BGP_RD_SIZE];
558 };
559
560 #define RMAP_IN 0
561 #define RMAP_OUT 1
562 #define RMAP_MAX 2
563
564 #include "filter.h"
565
566 /* BGP filter structure. */
567 struct bgp_filter {
568 /* Distribute-list. */
569 struct {
570 char *name;
571 struct access_list *alist;
572 } dlist[FILTER_MAX];
573
574 /* Prefix-list. */
575 struct {
576 char *name;
577 struct prefix_list *plist;
578 } plist[FILTER_MAX];
579
580 /* Filter-list. */
581 struct {
582 char *name;
583 struct as_list *aslist;
584 } aslist[FILTER_MAX];
585
586 /* Route-map. */
587 struct {
588 char *name;
589 struct route_map *map;
590 } map[RMAP_MAX];
591
592 /* Unsuppress-map. */
593 struct {
594 char *name;
595 struct route_map *map;
596 } usmap;
597 };
598
599 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
600 a peer who's AS is part of our Confederation. */
601 typedef enum {
602 BGP_PEER_IBGP = 1,
603 BGP_PEER_EBGP,
604 BGP_PEER_INTERNAL,
605 BGP_PEER_CONFED,
606 } bgp_peer_sort_t;
607
608 /* BGP message header and packet size. */
609 #define BGP_MARKER_SIZE 16
610 #define BGP_HEADER_SIZE 19
611 #define BGP_MAX_PACKET_SIZE 4096
612 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
613
614 /*
615 * Trigger delay for bgp_announce_route().
616 */
617 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
618 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
619
620 struct peer_af {
621 /* back pointer to the peer */
622 struct peer *peer;
623
624 /* which subgroup the peer_af belongs to */
625 struct update_subgroup *subgroup;
626
627 /* for being part of an update subgroup's peer list */
628 LIST_ENTRY(peer_af) subgrp_train;
629
630 /* for being part of a packet's peer list */
631 LIST_ENTRY(peer_af) pkt_train;
632
633 struct bpacket *next_pkt_to_send;
634
635 /*
636 * Trigger timer for bgp_announce_route().
637 */
638 struct thread *t_announce_route;
639
640 afi_t afi;
641 safi_t safi;
642 int afid;
643 };
644
645 /* BGP neighbor structure. */
646 struct peer {
647 /* BGP structure. */
648 struct bgp *bgp;
649
650 /* reference count, primarily to allow bgp_process'ing of route_node's
651 * to be done after a struct peer is deleted.
652 *
653 * named 'lock' for hysterical reasons within Quagga.
654 */
655 int lock;
656
657 /* BGP peer group. */
658 struct peer_group *group;
659 uint64_t version[AFI_MAX][SAFI_MAX];
660
661 /* BGP peer_af structures, per configured AF on this peer */
662 struct peer_af *peer_af_array[BGP_AF_MAX];
663
664 /* Peer's remote AS number. */
665 int as_type;
666 as_t as;
667
668 /* Peer's local AS number. */
669 as_t local_as;
670
671 bgp_peer_sort_t sort;
672
673 /* Peer's Change local AS number. */
674 as_t change_local_as;
675
676 /* Remote router ID. */
677 struct in_addr remote_id;
678
679 /* Local router ID. */
680 struct in_addr local_id;
681
682 /* Packet receive and send buffer. */
683 pthread_mutex_t io_mtx; // guards ibuf, obuf
684 struct stream_fifo *ibuf; // packets waiting to be processed
685 struct stream_fifo *obuf; // packets waiting to be written
686
687 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
688 struct stream *obuf_work; // WiP buffer used to construct packets
689
690 struct stream *curr; // the current packet being parsed
691
692 /* We use a separate stream to encode MP_REACH_NLRI for efficient
693 * NLRI packing. peer->obuf_work stores all the other attributes. The
694 * actual packet is then constructed by concatenating the two.
695 */
696 struct stream *scratch;
697
698 /* the doppelganger peer structure, due to dual TCP conn setup */
699 struct peer *doppelganger;
700
701 /* Status of the peer. */
702 int status;
703 int ostatus;
704
705 /* FSM events, stored for debug purposes.
706 * Note: uchar used for reduced memory usage.
707 */
708 unsigned char cur_event;
709 unsigned char last_event;
710 unsigned char last_major_event;
711
712 /* Peer index, used for dumping TABLE_DUMP_V2 format */
713 uint16_t table_dump_index;
714
715 /* Peer information */
716 int fd; /* File descriptor */
717 int ttl; /* TTL of TCP connection to the peer. */
718 int rtt; /* Estimated round-trip-time from TCP_INFO */
719 int gtsm_hops; /* minimum hopcount to peer */
720 char *desc; /* Description of the peer. */
721 unsigned short port; /* Destination port for peer */
722 char *host; /* Printable address of the peer. */
723 union sockunion su; /* Sockunion address of the peer. */
724 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
725 time_t uptime; /* Last Up/Down time */
726 time_t readtime; /* Last read time */
727 time_t resettime; /* Last reset time */
728
729 char *conf_if; /* neighbor interface config name. */
730 struct interface *ifp; /* corresponding interface */
731 char *ifname; /* bind interface name. */
732 char *update_if;
733 union sockunion *update_source;
734
735 union sockunion *su_local; /* Sockunion of local address. */
736 union sockunion *su_remote; /* Sockunion of remote address. */
737 int shared_network; /* Is this peer shared same network. */
738 struct bgp_nexthop nexthop; /* Nexthop */
739
740 /* Peer address family configuration. */
741 uint8_t afc[AFI_MAX][SAFI_MAX];
742 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
743 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
744 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
745
746 /* Capability flags (reset in bgp_stop) */
747 uint32_t cap;
748 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
749 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
750 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
751 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
752 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
753 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
754 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
755 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
756 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
757 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
758 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
759 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
760 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
761 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
762 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
763 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
764 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
765
766 /* Capability flags (reset in bgp_stop) */
767 uint32_t af_cap[AFI_MAX][SAFI_MAX];
768 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
769 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
770 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
771 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
772 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
773 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
774 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
775 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
776 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
777 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
778 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
779 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
780 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
781 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
782 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
783
784 /* Global configuration flags. */
785 uint32_t flags;
786 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
787 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
788 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
789 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
790 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
791 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
792 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
793 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
794 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
795 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
796 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
797 #define PEER_FLAG_LONESOUL (1 << 11)
798 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
799 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
800 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
801 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
802
803 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
804 char *tx_shutdown_message;
805
806 /* NSF mode (graceful restart) */
807 uint8_t nsf[AFI_MAX][SAFI_MAX];
808
809 /* Per AF configuration flags. */
810 uint32_t af_flags[AFI_MAX][SAFI_MAX];
811 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
812 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
813 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
814 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
815 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
816 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
817 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
818 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
819 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
820 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
821 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
822 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
823 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
824 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
825 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
826 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
827 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
828 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
829 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
830 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
831 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
832 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
833 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS (1 << 22) /* addpath-tx-all-paths */
834 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
835 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
836 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
837 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
838
839 /* MD5 password */
840 char *password;
841
842 /* default-originate route-map. */
843 struct {
844 char *name;
845 struct route_map *map;
846 } default_rmap[AFI_MAX][SAFI_MAX];
847
848 /* Peer status flags. */
849 uint16_t sflags;
850 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
851 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
852 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
853 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
854 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
855 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
856 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
857
858 /* Peer status af flags (reset in bgp_stop) */
859 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
860 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
861 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
862 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
863 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
864 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
865 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
866
867 /* Default attribute value for the peer. */
868 uint32_t config;
869 #define PEER_CONFIG_TIMER (1 << 0) /* keepalive & holdtime */
870 #define PEER_CONFIG_CONNECT (1 << 1) /* connect */
871 #define PEER_CONFIG_ROUTEADV (1 << 2) /* route advertise */
872 #define PEER_GROUP_CONFIG_TIMER (1 << 3) /* timers from peer-group */
873
874 #define PEER_OR_GROUP_TIMER_SET(peer) \
875 (CHECK_FLAG(peer->config, PEER_CONFIG_TIMER) \
876 || CHECK_FLAG(peer->config, PEER_GROUP_CONFIG_TIMER))
877
878 _Atomic uint32_t holdtime;
879 _Atomic uint32_t keepalive;
880 _Atomic uint32_t connect;
881 _Atomic uint32_t routeadv;
882
883 /* Timer values. */
884 _Atomic uint32_t v_start;
885 _Atomic uint32_t v_connect;
886 _Atomic uint32_t v_holdtime;
887 _Atomic uint32_t v_keepalive;
888 _Atomic uint32_t v_routeadv;
889 _Atomic uint32_t v_pmax_restart;
890 _Atomic uint32_t v_gr_restart;
891
892 /* Threads. */
893 struct thread *t_read;
894 struct thread *t_write;
895 struct thread *t_start;
896 struct thread *t_connect_check_r;
897 struct thread *t_connect_check_w;
898 struct thread *t_connect;
899 struct thread *t_holdtime;
900 struct thread *t_routeadv;
901 struct thread *t_pmax_restart;
902 struct thread *t_gr_restart;
903 struct thread *t_gr_stale;
904 struct thread *t_generate_updgrp_packets;
905 struct thread *t_process_packet;
906
907 /* Thread flags. */
908 _Atomic uint16_t thread_flags;
909 #define PEER_THREAD_WRITES_ON (1 << 0)
910 #define PEER_THREAD_READS_ON (1 << 1)
911 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
912 /* workqueues */
913 struct work_queue *clear_node_queue;
914
915 #define PEER_TOTAL_RX(peer) \
916 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
917 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
918 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
919 + atomic_load_explicit(&peer->refresh_in, \
920 memory_order_relaxed) \
921 + atomic_load_explicit(&peer->keepalive_in, \
922 memory_order_relaxed) \
923 + atomic_load_explicit(&peer->dynamic_cap_in, \
924 memory_order_relaxed)
925
926 #define PEER_TOTAL_TX(peer) \
927 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
928 + atomic_load_explicit(&peer->update_out, \
929 memory_order_relaxed) \
930 + atomic_load_explicit(&peer->notify_out, \
931 memory_order_relaxed) \
932 + atomic_load_explicit(&peer->refresh_out, \
933 memory_order_relaxed) \
934 + atomic_load_explicit(&peer->keepalive_out, \
935 memory_order_relaxed) \
936 + atomic_load_explicit(&peer->dynamic_cap_out, \
937 memory_order_relaxed)
938
939 /* Statistics field */
940 _Atomic uint32_t open_in; /* Open message input count */
941 _Atomic uint32_t open_out; /* Open message output count */
942 _Atomic uint32_t update_in; /* Update message input count */
943 _Atomic uint32_t update_out; /* Update message ouput count */
944 _Atomic time_t update_time; /* Update message received time. */
945 _Atomic uint32_t keepalive_in; /* Keepalive input count */
946 _Atomic uint32_t keepalive_out; /* Keepalive output count */
947 _Atomic uint32_t notify_in; /* Notify input count */
948 _Atomic uint32_t notify_out; /* Notify output count */
949 _Atomic uint32_t refresh_in; /* Route Refresh input count */
950 _Atomic uint32_t refresh_out; /* Route Refresh output count */
951 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
952 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
953
954 /* BGP state count */
955 uint32_t established; /* Established */
956 uint32_t dropped; /* Dropped */
957
958 /* Update delay related fields */
959 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
960 for EOR */
961
962 /* Syncronization list and time. */
963 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
964 time_t synctime;
965 /* timestamp when the last UPDATE msg was written */
966 _Atomic time_t last_write;
967 /* timestamp when the last msg was written */
968 _Atomic time_t last_update;
969
970 /* Send prefix count. */
971 unsigned long scount[AFI_MAX][SAFI_MAX];
972
973 /* Notify data. */
974 struct bgp_notify notify;
975
976 /* Filter structure. */
977 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
978
979 /* ORF Prefix-list */
980 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
981
982 /* Text description of last attribute rcvd */
983 char rcvd_attr_str[BUFSIZ];
984
985 /* Track if we printed the attribute in debugs */
986 int rcvd_attr_printed;
987
988 /* Prefix count. */
989 unsigned long pcount[AFI_MAX][SAFI_MAX];
990
991 /* Max prefix count. */
992 unsigned long pmax[AFI_MAX][SAFI_MAX];
993 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
994 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
995 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
996
997 /* allowas-in. */
998 char allowas_in[AFI_MAX][SAFI_MAX];
999
1000 /* weight */
1001 unsigned long weight[AFI_MAX][SAFI_MAX];
1002
1003 /* peer reset cause */
1004 char last_reset;
1005 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1006 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1007 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1008 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1009 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1010 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1011 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1012 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1013 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1014 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1015 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1016 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1017 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1018 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1019 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1020 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1021 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1022 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1023 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1024 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1025 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1026 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1027 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1028 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1029 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1030 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1031 unsigned long last_reset_cause_size;
1032 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1033
1034 /* The kind of route-map Flags.*/
1035 uint8_t rmap_type;
1036 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1037 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1038 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1039 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1040 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1041 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1042 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1043 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1044
1045 /* peer specific BFD information */
1046 struct bfd_info *bfd_info;
1047
1048 /* hostname and domainname advertised by host */
1049 char *hostname;
1050 char *domainname;
1051
1052 QOBJ_FIELDS
1053 };
1054 DECLARE_QOBJ_TYPE(peer)
1055
1056 /* Check if suppress start/restart of sessions to peer. */
1057 #define BGP_PEER_START_SUPPRESSED(P) \
1058 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1059 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1060
1061 #define PEER_PASSWORD_MINLEN (1)
1062 #define PEER_PASSWORD_MAXLEN (80)
1063
1064 /* This structure's member directly points incoming packet data
1065 stream. */
1066 struct bgp_nlri {
1067 /* AFI. */
1068 uint16_t afi; /* iana_afi_t */
1069
1070 /* SAFI. */
1071 uint8_t safi; /* iana_safi_t */
1072
1073 /* Pointer to NLRI byte stream. */
1074 uint8_t *nlri;
1075
1076 /* Length of whole NLRI. */
1077 bgp_size_t length;
1078 };
1079
1080 /* BGP versions. */
1081 #define BGP_VERSION_4 4
1082
1083 /* Default BGP port number. */
1084 #define BGP_PORT_DEFAULT 179
1085
1086 /* BGP minimum message size. */
1087 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1088 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1089 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1090 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1091 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1092 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1093
1094 /* BGP message types. */
1095 #define BGP_MSG_OPEN 1
1096 #define BGP_MSG_UPDATE 2
1097 #define BGP_MSG_NOTIFY 3
1098 #define BGP_MSG_KEEPALIVE 4
1099 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1100 #define BGP_MSG_CAPABILITY 6
1101 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1102
1103 /* BGP open optional parameter. */
1104 #define BGP_OPEN_OPT_AUTH 1
1105 #define BGP_OPEN_OPT_CAP 2
1106
1107 /* BGP4 attribute type codes. */
1108 #define BGP_ATTR_ORIGIN 1
1109 #define BGP_ATTR_AS_PATH 2
1110 #define BGP_ATTR_NEXT_HOP 3
1111 #define BGP_ATTR_MULTI_EXIT_DISC 4
1112 #define BGP_ATTR_LOCAL_PREF 5
1113 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1114 #define BGP_ATTR_AGGREGATOR 7
1115 #define BGP_ATTR_COMMUNITIES 8
1116 #define BGP_ATTR_ORIGINATOR_ID 9
1117 #define BGP_ATTR_CLUSTER_LIST 10
1118 #define BGP_ATTR_DPA 11
1119 #define BGP_ATTR_ADVERTISER 12
1120 #define BGP_ATTR_RCID_PATH 13
1121 #define BGP_ATTR_MP_REACH_NLRI 14
1122 #define BGP_ATTR_MP_UNREACH_NLRI 15
1123 #define BGP_ATTR_EXT_COMMUNITIES 16
1124 #define BGP_ATTR_AS4_PATH 17
1125 #define BGP_ATTR_AS4_AGGREGATOR 18
1126 #define BGP_ATTR_AS_PATHLIMIT 21
1127 #define BGP_ATTR_PMSI_TUNNEL 22
1128 #define BGP_ATTR_ENCAP 23
1129 #define BGP_ATTR_LARGE_COMMUNITIES 32
1130 #define BGP_ATTR_PREFIX_SID 40
1131 #if ENABLE_BGP_VNC
1132 #define BGP_ATTR_VNC 255
1133 #endif
1134
1135 /* BGP update origin. */
1136 #define BGP_ORIGIN_IGP 0
1137 #define BGP_ORIGIN_EGP 1
1138 #define BGP_ORIGIN_INCOMPLETE 2
1139
1140 /* BGP notify message codes. */
1141 #define BGP_NOTIFY_HEADER_ERR 1
1142 #define BGP_NOTIFY_OPEN_ERR 2
1143 #define BGP_NOTIFY_UPDATE_ERR 3
1144 #define BGP_NOTIFY_HOLD_ERR 4
1145 #define BGP_NOTIFY_FSM_ERR 5
1146 #define BGP_NOTIFY_CEASE 6
1147 #define BGP_NOTIFY_CAPABILITY_ERR 7
1148
1149 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1150
1151 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1152 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1153 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1154 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1155
1156 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1157 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1158 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1159 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1160 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1161 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1162 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1163 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1164 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1165
1166 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1167 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1168 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1169 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1170 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1171 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1172 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1173 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1174 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1175 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1176 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1177 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1178
1179 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1180 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1181 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1182 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1183 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1184 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1185 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1186 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1187 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1188
1189 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1190 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1191 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1192 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1193
1194 /* BGP finite state machine status. */
1195 #define Idle 1
1196 #define Connect 2
1197 #define Active 3
1198 #define OpenSent 4
1199 #define OpenConfirm 5
1200 #define Established 6
1201 #define Clearing 7
1202 #define Deleted 8
1203 #define BGP_STATUS_MAX 9
1204
1205 /* BGP finite state machine events. */
1206 #define BGP_Start 1
1207 #define BGP_Stop 2
1208 #define TCP_connection_open 3
1209 #define TCP_connection_closed 4
1210 #define TCP_connection_open_failed 5
1211 #define TCP_fatal_error 6
1212 #define ConnectRetry_timer_expired 7
1213 #define Hold_Timer_expired 8
1214 #define KeepAlive_timer_expired 9
1215 #define Receive_OPEN_message 10
1216 #define Receive_KEEPALIVE_message 11
1217 #define Receive_UPDATE_message 12
1218 #define Receive_NOTIFICATION_message 13
1219 #define Clearing_Completed 14
1220 #define BGP_EVENTS_MAX 15
1221
1222 /* BGP timers default value. */
1223 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1224 #define BGP_INIT_START_TIMER 1
1225 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1226 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1227 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1228 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1229 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1230
1231 /* BGP default local preference. */
1232 #define BGP_DEFAULT_LOCAL_PREF 100
1233
1234 /* BGP local-preference to send when 'bgp graceful-shutdown'
1235 * is configured */
1236 #define BGP_GSHUT_LOCAL_PREF 0
1237
1238 /* BGP default subgroup packet queue max . */
1239 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1240
1241 /* BGP graceful restart */
1242 #define BGP_DEFAULT_RESTART_TIME 120
1243 #define BGP_DEFAULT_STALEPATH_TIME 360
1244
1245 /* BGP uptime string length. */
1246 #define BGP_UPTIME_LEN 25
1247
1248 /* Default configuration settings for bgpd. */
1249 #define BGP_VTY_PORT 2605
1250 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1251
1252 /* Check AS path loop when we send NLRI. */
1253 /* #define BGP_SEND_ASPATH_CHECK */
1254
1255 /* BGP Dynamic Neighbors feature */
1256 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1257 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1258 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1259
1260 /* Flag for peer_clear_soft(). */
1261 enum bgp_clear_type {
1262 BGP_CLEAR_SOFT_NONE,
1263 BGP_CLEAR_SOFT_OUT,
1264 BGP_CLEAR_SOFT_IN,
1265 BGP_CLEAR_SOFT_BOTH,
1266 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1267 };
1268
1269 /* Macros. */
1270 #define BGP_INPUT(P) ((P)->curr)
1271 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1272 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1273 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1274
1275 /* BGP error codes. */
1276 #define BGP_SUCCESS 0
1277 #define BGP_ERR_INVALID_VALUE -1
1278 #define BGP_ERR_INVALID_FLAG -2
1279 #define BGP_ERR_INVALID_AS -3
1280 #define BGP_ERR_INVALID_BGP -4
1281 #define BGP_ERR_PEER_GROUP_MEMBER -5
1282 #define BGP_ERR_MULTIPLE_INSTANCE_USED -6
1283 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1284 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1285 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1286 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1287 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET -11
1288 #define BGP_ERR_AS_MISMATCH -12
1289 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1290 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1291 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1292 #define BGP_ERR_NOT_INTERNAL_PEER -16
1293 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1294 #define BGP_ERR_AF_UNCONFIGURED -18
1295 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1296 #define BGP_ERR_INSTANCE_MISMATCH -20
1297 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1298 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1299 #define BGP_ERR_TCPSIG_FAILED -23
1300 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1301 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1302 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1303 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1304 #define BGP_ERR_AS_OVERRIDE -28
1305 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1306 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1307 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1308 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1309 #define BGP_ERR_MAX -33
1310 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1311 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1312
1313 /*
1314 * Enumeration of different policy kinds a peer can be configured with.
1315 */
1316 typedef enum {
1317 BGP_POLICY_ROUTE_MAP,
1318 BGP_POLICY_FILTER_LIST,
1319 BGP_POLICY_PREFIX_LIST,
1320 BGP_POLICY_DISTRIBUTE_LIST,
1321 } bgp_policy_type_e;
1322
1323 extern struct bgp_master *bm;
1324 extern unsigned int multipath_num;
1325
1326 /* Prototypes. */
1327 extern void bgp_terminate(void);
1328 extern void bgp_reset(void);
1329 extern time_t bgp_clock(void);
1330 extern void bgp_zclient_reset(void);
1331 extern int bgp_nexthop_set(union sockunion *, union sockunion *,
1332 struct bgp_nexthop *, struct peer *);
1333 extern struct bgp *bgp_get_default(void);
1334 extern struct bgp *bgp_lookup(as_t, const char *);
1335 extern struct bgp *bgp_lookup_by_name(const char *);
1336 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1337 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1338 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1339 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1340 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1341 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1342 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1343 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1344 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1345 union sockunion *,
1346 struct peer_group *);
1347 extern struct prefix *
1348 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1349 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1350 struct prefix *,
1351 struct prefix **);
1352 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1353 union sockunion *);
1354 extern void peer_drop_dynamic_neighbor(struct peer *);
1355
1356 /*
1357 * Peers are incredibly easy to memory leak
1358 * due to the various ways that they are actually used
1359 * Provide some functionality to debug locks and unlocks
1360 */
1361 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1362 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1363 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1364 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1365
1366 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1367 extern int peer_active(struct peer *);
1368 extern int peer_active_nego(struct peer *);
1369 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1370 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1371 as_t, as_t, int, afi_t, safi_t,
1372 struct peer_group *);
1373 extern struct peer *peer_create_accept(struct bgp *);
1374 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1375 extern char *peer_uptime(time_t, char *, size_t, uint8_t, json_object *);
1376
1377 extern int bgp_config_write(struct vty *);
1378
1379 extern void bgp_master_init(struct thread_master *master);
1380
1381 extern void bgp_init(void);
1382 extern void bgp_pthreads_run(void);
1383 extern void bgp_pthreads_finish(void);
1384 extern void bgp_route_map_init(void);
1385 extern void bgp_session_reset(struct peer *);
1386
1387 extern int bgp_option_set(int);
1388 extern int bgp_option_unset(int);
1389 extern int bgp_option_check(int);
1390
1391 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1392 extern void bgp_instance_up(struct bgp *);
1393 extern void bgp_instance_down(struct bgp *);
1394 extern int bgp_delete(struct bgp *);
1395
1396 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1397 vrf_id_t old_vrf_id, bool create);
1398
1399 extern int bgp_flag_set(struct bgp *, int);
1400 extern int bgp_flag_unset(struct bgp *, int);
1401 extern int bgp_flag_check(struct bgp *, int);
1402
1403 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1404 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1405
1406 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1407 extern int bgp_cluster_id_unset(struct bgp *);
1408
1409 extern int bgp_confederation_id_set(struct bgp *, as_t);
1410 extern int bgp_confederation_id_unset(struct bgp *);
1411 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1412
1413 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1414 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1415
1416 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1417 extern int bgp_timers_unset(struct bgp *);
1418
1419 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1420 extern int bgp_default_local_preference_unset(struct bgp *);
1421
1422 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1423 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1424
1425 extern int bgp_listen_limit_set(struct bgp *, int);
1426 extern int bgp_listen_limit_unset(struct bgp *);
1427
1428 extern int bgp_update_delay_active(struct bgp *);
1429 extern int bgp_update_delay_configured(struct bgp *);
1430 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1431 extern void peer_as_change(struct peer *, as_t, int);
1432 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1433 int, afi_t, safi_t);
1434 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1435 extern int peer_delete(struct peer *peer);
1436 extern int peer_group_delete(struct peer_group *);
1437 extern int peer_group_remote_as_delete(struct peer_group *);
1438 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1439
1440 extern int peer_activate(struct peer *, afi_t, safi_t);
1441 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1442 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1443
1444 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1445 struct peer_group *, as_t *);
1446 extern int peer_group_unbind(struct bgp *, struct peer *, struct peer_group *);
1447
1448 extern int peer_flag_set(struct peer *, uint32_t);
1449 extern int peer_flag_unset(struct peer *, uint32_t);
1450
1451 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1452 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1453 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1454
1455 extern int peer_ebgp_multihop_set(struct peer *, int);
1456 extern int peer_ebgp_multihop_unset(struct peer *);
1457 extern int is_ebgp_multihop_configured(struct peer *peer);
1458
1459 extern int peer_description_set(struct peer *, const char *);
1460 extern int peer_description_unset(struct peer *);
1461
1462 extern int peer_update_source_if_set(struct peer *, const char *);
1463 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1464 extern int peer_update_source_unset(struct peer *);
1465
1466 extern int peer_default_originate_set(struct peer *, afi_t, safi_t,
1467 const char *);
1468 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1469
1470 extern int peer_port_set(struct peer *, uint16_t);
1471 extern int peer_port_unset(struct peer *);
1472
1473 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1474 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1475
1476 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1477 uint32_t holdtime);
1478 extern int peer_timers_unset(struct peer *);
1479
1480 extern int peer_timers_connect_set(struct peer *, uint32_t);
1481 extern int peer_timers_connect_unset(struct peer *);
1482
1483 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1484 extern int peer_advertise_interval_unset(struct peer *);
1485
1486 extern void peer_interface_set(struct peer *, const char *);
1487 extern void peer_interface_unset(struct peer *);
1488
1489 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1490 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1491
1492 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1493 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1494
1495 extern int peer_local_as_set(struct peer *, as_t, int, int);
1496 extern int peer_local_as_unset(struct peer *);
1497
1498 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1499 const char *);
1500 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1501
1502 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1503 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1504
1505 extern int peer_route_map_set(struct peer *, afi_t, safi_t, int, const char *);
1506 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1507
1508 extern int peer_unsuppress_map_set(struct peer *, afi_t, safi_t, const char *);
1509
1510 extern int peer_password_set(struct peer *, const char *);
1511 extern int peer_password_unset(struct peer *);
1512
1513 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1514
1515 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1516 uint8_t, int, uint16_t);
1517 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1518
1519 extern int peer_clear(struct peer *, struct listnode **);
1520 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1521
1522 extern int peer_ttl_security_hops_set(struct peer *, int);
1523 extern int peer_ttl_security_hops_unset(struct peer *);
1524
1525 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1526 extern int peer_tx_shutdown_message_unset(struct peer *);
1527
1528 extern int bgp_route_map_update_timer(struct thread *thread);
1529 extern void bgp_route_map_terminate(void);
1530
1531 extern int peer_cmp(struct peer *p1, struct peer *p2);
1532
1533 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1534 afi_t *afi, safi_t *safi);
1535 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1536 iana_afi_t *pkt_afi,
1537 iana_safi_t *pkt_safi);
1538
1539 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1540 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1541 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1542
1543 extern void bgp_close(void);
1544 extern void bgp_free(struct bgp *);
1545
1546 static inline struct bgp *bgp_lock(struct bgp *bgp)
1547 {
1548 bgp->lock++;
1549 return bgp;
1550 }
1551
1552 static inline void bgp_unlock(struct bgp *bgp)
1553 {
1554 assert(bgp->lock > 0);
1555 if (--bgp->lock == 0)
1556 bgp_free(bgp);
1557 }
1558
1559 static inline int afindex(afi_t afi, safi_t safi)
1560 {
1561 switch (afi) {
1562 case AFI_IP:
1563 switch (safi) {
1564 case SAFI_UNICAST:
1565 return BGP_AF_IPV4_UNICAST;
1566 break;
1567 case SAFI_MULTICAST:
1568 return BGP_AF_IPV4_MULTICAST;
1569 break;
1570 case SAFI_LABELED_UNICAST:
1571 return BGP_AF_IPV4_LBL_UNICAST;
1572 break;
1573 case SAFI_MPLS_VPN:
1574 return BGP_AF_IPV4_VPN;
1575 break;
1576 case SAFI_ENCAP:
1577 return BGP_AF_IPV4_ENCAP;
1578 break;
1579 case SAFI_FLOWSPEC:
1580 return BGP_AF_IPV4_FLOWSPEC;
1581 default:
1582 return BGP_AF_MAX;
1583 break;
1584 }
1585 break;
1586 case AFI_IP6:
1587 switch (safi) {
1588 case SAFI_UNICAST:
1589 return BGP_AF_IPV6_UNICAST;
1590 break;
1591 case SAFI_MULTICAST:
1592 return BGP_AF_IPV6_MULTICAST;
1593 break;
1594 case SAFI_LABELED_UNICAST:
1595 return BGP_AF_IPV6_LBL_UNICAST;
1596 break;
1597 case SAFI_MPLS_VPN:
1598 return BGP_AF_IPV6_VPN;
1599 break;
1600 case SAFI_ENCAP:
1601 return BGP_AF_IPV6_ENCAP;
1602 break;
1603 case SAFI_FLOWSPEC:
1604 return BGP_AF_IPV6_FLOWSPEC;
1605 default:
1606 return BGP_AF_MAX;
1607 break;
1608 }
1609 break;
1610 case AFI_L2VPN:
1611 switch (safi) {
1612 case SAFI_EVPN:
1613 return BGP_AF_L2VPN_EVPN;
1614 break;
1615 default:
1616 return BGP_AF_MAX;
1617 break;
1618 }
1619 default:
1620 return BGP_AF_MAX;
1621 break;
1622 }
1623 }
1624
1625 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1626 static inline int peer_group_active(struct peer *peer)
1627 {
1628 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1629 return 1;
1630 return 0;
1631 }
1632
1633 /* If peer is negotiated at least one address family return 1. */
1634 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1635 {
1636 if (peer->afc_nego[afi][SAFI_UNICAST]
1637 || peer->afc_nego[afi][SAFI_MULTICAST]
1638 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1639 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1640 || peer->afc_nego[afi][SAFI_ENCAP]
1641 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1642 || peer->afc_nego[afi][SAFI_EVPN])
1643 return 1;
1644 return 0;
1645 }
1646
1647 /* If at least one address family activated for group, return 1. */
1648 static inline int peer_group_af_configured(struct peer_group *group)
1649 {
1650 struct peer *peer = group->conf;
1651
1652 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1653 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1654 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1655 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1656 || peer->afc[AFI_IP6][SAFI_UNICAST]
1657 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1658 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1659 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1660 || peer->afc[AFI_IP6][SAFI_ENCAP]
1661 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1662 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1663 return 1;
1664 return 0;
1665 }
1666
1667 static inline char *timestamp_string(time_t ts)
1668 {
1669 time_t tbuf;
1670 tbuf = time(NULL) - (bgp_clock() - ts);
1671 return ctime(&tbuf);
1672 }
1673
1674 static inline int peer_established(struct peer *peer)
1675 {
1676 if (peer->status == Established)
1677 return 1;
1678 return 0;
1679 }
1680
1681 static inline int peer_dynamic_neighbor(struct peer *peer)
1682 {
1683 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1684 }
1685
1686 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1687 {
1688 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1689 }
1690
1691 /* Lookup VRF for BGP instance based on its type. */
1692 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1693 {
1694 struct vrf *vrf;
1695
1696 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1697 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1698 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1699 vrf = vrf_lookup_by_name(bgp->name);
1700 else
1701 vrf = NULL;
1702
1703 return vrf;
1704 }
1705
1706 /* Link BGP instance to VRF. */
1707 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1708 {
1709 bgp->vrf_id = vrf->vrf_id;
1710 if (vrf->info != (void *)bgp)
1711 vrf->info = (void *)bgp_lock(bgp);
1712 }
1713
1714 /* Unlink BGP instance from VRF. */
1715 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1716 {
1717 if (vrf->info == (void *)bgp) {
1718 vrf->info = NULL;
1719 bgp_unlock(bgp);
1720 }
1721 bgp->vrf_id = VRF_UNKNOWN;
1722 }
1723
1724 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1725
1726 /* For benefit of rfapi */
1727 extern struct peer *peer_new(struct bgp *bgp);
1728
1729 #endif /* _QUAGGA_BGPD_H */
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