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Merge pull request #12727 from opensourcerouting/feature/bgp_software_version_capability
[mirror_frr.git] / bgpd / bgpd.h
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 "hook.h"
28 #include "frr_pthread.h"
29 #include "lib/json.h"
30 #include "vrf.h"
31 #include "vty.h"
32 #include "srv6.h"
33 #include "iana_afi.h"
34
35 /* For union sockunion. */
36 #include "queue.h"
37 #include "sockunion.h"
38 #include "routemap.h"
39 #include "linklist.h"
40 #include "defaults.h"
41 #include "bgp_memory.h"
42 #include "bitfield.h"
43 #include "vxlan.h"
44 #include "bgp_labelpool.h"
45 #include "bgp_addpath_types.h"
46 #include "bgp_nexthop.h"
47 #include "bgp_io.h"
48
49 #include "lib/bfd.h"
50
51 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
52 #define BGP_PEER_MAX_HASH_SIZE 16384
53
54 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
55 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
56
57 struct update_subgroup;
58 struct bpacket;
59 struct bgp_pbr_config;
60
61 /*
62 * Allow the neighbor XXXX remote-as to take internal or external
63 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
64 * behavior
65 * in the system.
66 */
67 enum { AS_UNSPECIFIED = 0,
68 AS_SPECIFIED,
69 AS_INTERNAL,
70 AS_EXTERNAL,
71 };
72
73 /* Zebra Gracaful Restart states */
74 enum zebra_gr_mode {
75 ZEBRA_GR_DISABLE = 0,
76 ZEBRA_GR_ENABLE
77 };
78
79 /* Typedef BGP specific types. */
80 typedef uint32_t as_t;
81 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
82 typedef uint16_t bgp_size_t;
83
84 enum bgp_af_index {
85 BGP_AF_START,
86 BGP_AF_IPV4_UNICAST = BGP_AF_START,
87 BGP_AF_IPV4_MULTICAST,
88 BGP_AF_IPV4_VPN,
89 BGP_AF_IPV6_UNICAST,
90 BGP_AF_IPV6_MULTICAST,
91 BGP_AF_IPV6_VPN,
92 BGP_AF_IPV4_ENCAP,
93 BGP_AF_IPV6_ENCAP,
94 BGP_AF_L2VPN_EVPN,
95 BGP_AF_IPV4_LBL_UNICAST,
96 BGP_AF_IPV6_LBL_UNICAST,
97 BGP_AF_IPV4_FLOWSPEC,
98 BGP_AF_IPV6_FLOWSPEC,
99 BGP_AF_MAX
100 };
101
102 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
103
104 #define FOREACH_SAFI(safi) \
105 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
106
107 extern struct frr_pthread *bgp_pth_io;
108 extern struct frr_pthread *bgp_pth_ka;
109
110 /* BGP master for system wide configurations and variables. */
111 struct bgp_master {
112 /* BGP instance list. */
113 struct list *bgp;
114
115 /* BGP thread master. */
116 struct thread_master *master;
117
118 /* Listening sockets */
119 struct list *listen_sockets;
120
121 /* BGP port number. */
122 uint16_t port;
123
124 /* Listener addresses */
125 struct list *addresses;
126
127 /* The Mac table */
128 struct hash *self_mac_hash;
129
130 /* BGP start time. */
131 time_t start_time;
132
133 /* Various BGP global configuration. */
134 uint8_t options;
135
136 #define BGP_OPT_NO_FIB (1 << 0)
137 #define BGP_OPT_NO_LISTEN (1 << 1)
138 #define BGP_OPT_NO_ZEBRA (1 << 2)
139
140 uint64_t updgrp_idspace;
141 uint64_t subgrp_idspace;
142
143 /* timer to dampen route map changes */
144 struct thread *t_rmap_update; /* Handle route map updates */
145 uint32_t rmap_update_timer; /* Route map update timer */
146 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
147
148 /* Id space for automatic RD derivation for an EVI/VRF */
149 bitfield_t rd_idspace;
150
151 /* dynamic mpls label allocation pool */
152 struct labelpool labelpool;
153
154 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
155 struct bgp* bgp_evpn;
156
157 /* How big should we set the socket buffer size */
158 uint32_t socket_buffer;
159
160 /* Should we do wait for fib install globally? */
161 bool wait_for_fib;
162
163 /* EVPN multihoming */
164 struct bgp_evpn_mh_info *mh_info;
165
166 /* global update-delay timer values */
167 uint16_t v_update_delay;
168 uint16_t v_establish_wait;
169
170 uint32_t flags;
171 #define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
172 #define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)
173
174 bool terminating; /* global flag that sigint terminate seen */
175
176 /* DSCP value for TCP sessions */
177 uint8_t tcp_dscp;
178
179 #define BM_DEFAULT_Q_LIMIT 10000
180 uint32_t inq_limit;
181 uint32_t outq_limit;
182
183 QOBJ_FIELDS;
184 };
185 DECLARE_QOBJ_TYPE(bgp_master);
186
187 /* BGP route-map structure. */
188 struct bgp_rmap {
189 char *name;
190 struct route_map *map;
191 };
192
193 struct bgp_redist {
194 unsigned short instance;
195
196 /* BGP redistribute metric configuration. */
197 uint8_t redist_metric_flag;
198 uint32_t redist_metric;
199
200 /* BGP redistribute route-map. */
201 struct bgp_rmap rmap;
202 };
203
204 enum vpn_policy_direction {
205 BGP_VPN_POLICY_DIR_FROMVPN = 0,
206 BGP_VPN_POLICY_DIR_TOVPN = 1,
207 BGP_VPN_POLICY_DIR_MAX = 2
208 };
209
210 struct vpn_policy {
211 struct bgp *bgp; /* parent */
212 afi_t afi;
213 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
214 struct ecommunity *import_redirect_rtlist;
215 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
216 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
217
218 /* should be mpls_label_t? */
219 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
220 uint32_t tovpn_zebra_vrf_label_last_sent;
221 struct prefix_rd tovpn_rd;
222 struct prefix tovpn_nexthop; /* unset => set to 0 */
223 uint32_t flags;
224 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
225 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
226 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
227 #define BGP_VPN_POLICY_TOVPN_SID_AUTO (1 << 3)
228
229 /*
230 * If we are importing another vrf into us keep a list of
231 * vrf names that are being imported into us.
232 */
233 struct list *import_vrf;
234
235 /*
236 * if we are being exported to another vrf keep a list of
237 * vrf names that we are being exported to.
238 */
239 struct list *export_vrf;
240
241 /*
242 * Segment-Routing SRv6 Mode
243 */
244 uint32_t tovpn_sid_index; /* unset => set to 0 */
245 struct in6_addr *tovpn_sid;
246 struct srv6_locator_chunk *tovpn_sid_locator;
247 uint32_t tovpn_sid_transpose_label;
248 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
249 };
250
251 /*
252 * Type of 'struct bgp'.
253 * - Default: The default instance
254 * - VRF: A specific (non-default) VRF
255 * - View: An instance used for route exchange
256 * The "default" instance is treated separately to simplify the code. Note
257 * that if deployed in a Multi-VRF environment, it may not exist.
258 */
259 enum bgp_instance_type {
260 BGP_INSTANCE_TYPE_DEFAULT,
261 BGP_INSTANCE_TYPE_VRF,
262 BGP_INSTANCE_TYPE_VIEW
263 };
264
265 #define BGP_SEND_EOR(bgp, afi, safi) \
266 (!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
267 && ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
268 || (bgp->gr_info[afi][safi].eor_required \
269 == bgp->gr_info[afi][safi].eor_received)))
270
271 /* BGP GR Global ds */
272
273 #define BGP_GLOBAL_GR_MODE 4
274 #define BGP_GLOBAL_GR_EVENT_CMD 4
275
276 /* Graceful restart selection deferral timer info */
277 struct graceful_restart_info {
278 /* Count of EOR message expected */
279 uint32_t eor_required;
280 /* Count of EOR received */
281 uint32_t eor_received;
282 /* Deferral Timer */
283 struct thread *t_select_deferral;
284 /* Routes Deferred */
285 uint32_t gr_deferred;
286 /* Best route select */
287 struct thread *t_route_select;
288 /* AFI, SAFI enabled */
289 bool af_enabled[AFI_MAX][SAFI_MAX];
290 /* Route update completed */
291 bool route_sync[AFI_MAX][SAFI_MAX];
292 };
293
294 enum global_mode {
295 GLOBAL_HELPER = 0, /* This is the default mode */
296 GLOBAL_GR,
297 GLOBAL_DISABLE,
298 GLOBAL_INVALID
299 };
300
301 enum global_gr_command {
302 GLOBAL_GR_CMD = 0,
303 NO_GLOBAL_GR_CMD,
304 GLOBAL_DISABLE_CMD,
305 NO_GLOBAL_DISABLE_CMD
306 };
307
308 #define BGP_GR_SUCCESS 0
309 #define BGP_GR_FAILURE 1
310
311 /* Handling of BGP link bandwidth (LB) on receiver - whether and how to
312 * do weighted ECMP. Note: This applies after multipath computation.
313 */
314 enum bgp_link_bw_handling {
315 /* Do ECMP if some paths don't have LB - default */
316 BGP_LINK_BW_ECMP,
317 /* Completely ignore LB, just do regular ECMP */
318 BGP_LINK_BW_IGNORE_BW,
319 /* Skip paths without LB, do wECMP on others */
320 BGP_LINK_BW_SKIP_MISSING,
321 /* Do wECMP with default weight for paths not having LB */
322 BGP_LINK_BW_DEFWT_4_MISSING
323 };
324
325 RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
326 RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
327
328 struct bgp_snmp_stats {
329 /* SNMP variables for mplsL3Vpn*/
330 time_t creation_time;
331 time_t modify_time;
332 bool active;
333 uint32_t routes_added;
334 uint32_t routes_deleted;
335 };
336
337 struct bgp_srv6_function {
338 struct in6_addr sid;
339 char locator_name[SRV6_LOCNAME_SIZE];
340 };
341
342 /* BGP instance structure. */
343 struct bgp {
344 /* AS number of this BGP instance. */
345 as_t as;
346
347 /* Name of this BGP instance. */
348 char *name;
349 char *name_pretty; /* printable "VRF|VIEW name|default" */
350
351 /* Type of instance and VRF id. */
352 enum bgp_instance_type inst_type;
353 vrf_id_t vrf_id;
354
355 /* Reference count to allow peer_delete to finish after bgp_delete */
356 int lock;
357
358 /* Self peer. */
359 struct peer *peer_self;
360
361 /* BGP peer. */
362 struct list *peer;
363 struct hash *peerhash;
364
365 /* BGP peer group. */
366 struct list *group;
367
368 /* The maximum number of BGP dynamic neighbors that can be created */
369 int dynamic_neighbors_limit;
370
371 /* The current number of BGP dynamic neighbors */
372 int dynamic_neighbors_count;
373
374 struct hash *update_groups[BGP_AF_MAX];
375
376 /*
377 * Global statistics for update groups.
378 */
379 struct {
380 uint32_t join_events;
381 uint32_t prune_events;
382 uint32_t merge_events;
383 uint32_t split_events;
384 uint32_t updgrp_switch_events;
385 uint32_t peer_refreshes_combined;
386 uint32_t adj_count;
387 uint32_t merge_checks_triggered;
388
389 uint32_t updgrps_created;
390 uint32_t updgrps_deleted;
391 uint32_t subgrps_created;
392 uint32_t subgrps_deleted;
393 } update_group_stats;
394
395 struct bgp_snmp_stats *snmp_stats;
396
397 /* BGP configuration. */
398 uint16_t config;
399 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
400 #define BGP_CONFIG_CONFEDERATION (1 << 1)
401
402 /* BGP router identifier. */
403 struct in_addr router_id;
404 struct in_addr router_id_static;
405 struct in_addr router_id_zebra;
406
407 /* BGP route reflector cluster ID. */
408 struct in_addr cluster_id;
409
410 /* BGP confederation information. */
411 as_t confed_id;
412 as_t *confed_peers;
413 int confed_peers_cnt;
414
415 struct thread
416 *t_startup; /* start-up timer on only once at the beginning */
417
418 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
419 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
420 uint32_t maxmed_onstartup_value; /* Max-med value when active on
421 start-up */
422 struct thread
423 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
424 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
425
426 bool v_maxmed_admin; /* true/false if max-med administrative is on/off
427 */
428 #define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
429 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
430 */
431 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
432
433 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
434 uint32_t maxmed_value; /* Max-med value when its active */
435
436 /* BGP update delay on startup */
437 struct thread *t_update_delay;
438 struct thread *t_establish_wait;
439 struct thread *t_revalidate[AFI_MAX][SAFI_MAX];
440
441 uint8_t update_delay_over;
442 uint8_t main_zebra_update_hold;
443 uint8_t main_peers_update_hold;
444 uint16_t v_update_delay;
445 uint16_t v_establish_wait;
446 char update_delay_begin_time[64];
447 char update_delay_end_time[64];
448 char update_delay_zebra_resume_time[64];
449 char update_delay_peers_resume_time[64];
450 uint32_t established;
451 uint32_t restarted_peers;
452 uint32_t implicit_eors;
453 uint32_t explicit_eors;
454 #define BGP_UPDATE_DELAY_DEF 0
455 #define BGP_UPDATE_DELAY_MIN 0
456 #define BGP_UPDATE_DELAY_MAX 3600
457
458 /* Reference bandwidth for BGP link-bandwidth. Used when
459 * the LB value has to be computed based on some other
460 * factor (e.g., number of multipaths for the prefix)
461 * Value is in Mbps
462 */
463 uint32_t lb_ref_bw;
464 #define BGP_LINK_BW_REF_BW 1
465
466 /* BGP flags. */
467 uint64_t flags;
468 #define BGP_FLAG_ALWAYS_COMPARE_MED (1ULL << 0)
469 #define BGP_FLAG_DETERMINISTIC_MED (1ULL << 1)
470 #define BGP_FLAG_MED_MISSING_AS_WORST (1ULL << 2)
471 #define BGP_FLAG_MED_CONFED (1ULL << 3)
472 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1ULL << 4)
473 #define BGP_FLAG_COMPARE_ROUTER_ID (1ULL << 5)
474 #define BGP_FLAG_ASPATH_IGNORE (1ULL << 6)
475 #define BGP_FLAG_IMPORT_CHECK (1ULL << 7)
476 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1ULL << 8)
477 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1ULL << 9)
478
479 /* This flag is set when we have full BGP Graceful-Restart mode enable */
480 #define BGP_FLAG_GRACEFUL_RESTART (1ULL << 10)
481
482 #define BGP_FLAG_ASPATH_CONFED (1ULL << 11)
483 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1ULL << 12)
484 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1ULL << 13)
485 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1ULL << 14)
486 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1ULL << 15)
487 #define BGP_FLAG_FORCE_STATIC_PROCESS (1ULL << 16)
488 #define BGP_FLAG_SHOW_HOSTNAME (1ULL << 17)
489 #define BGP_FLAG_GR_PRESERVE_FWD (1ULL << 18)
490 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1ULL << 19)
491 #define BGP_FLAG_DELETE_IN_PROGRESS (1ULL << 20)
492 #define BGP_FLAG_SELECT_DEFER_DISABLE (1ULL << 21)
493 #define BGP_FLAG_GR_DISABLE_EOR (1ULL << 22)
494 #define BGP_FLAG_EBGP_REQUIRES_POLICY (1ULL << 23)
495 #define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1ULL << 24)
496
497 /* This flag is set if the instance is in administrative shutdown */
498 #define BGP_FLAG_SHUTDOWN (1ULL << 25)
499 #define BGP_FLAG_SUPPRESS_FIB_PENDING (1ULL << 26)
500 #define BGP_FLAG_SUPPRESS_DUPLICATES (1ULL << 27)
501 #define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1ULL << 29)
502 /* Indicate Graceful Restart support for BGP NOTIFICATION messages */
503 #define BGP_FLAG_GRACEFUL_NOTIFICATION (1ULL << 30)
504 /* Send Hard Reset CEASE Notification for 'Administrative Reset' */
505 #define BGP_FLAG_HARD_ADMIN_RESET (1ULL << 31)
506 /* Evaluate the AIGP attribute during the best path selection process */
507 #define BGP_FLAG_COMPARE_AIGP (1ULL << 32)
508
509 /* BGP default address-families.
510 * New peers inherit enabled afi/safis from bgp instance.
511 */
512 uint16_t default_af[AFI_MAX][SAFI_MAX];
513
514 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
515 [BGP_GLOBAL_GR_EVENT_CMD];
516 enum global_mode global_gr_present_state;
517
518 /* This variable stores the current Graceful Restart state of Zebra
519 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
520 */
521 enum zebra_gr_mode present_zebra_gr_state;
522
523 /* BGP Per AF flags */
524 uint16_t af_flags[AFI_MAX][SAFI_MAX];
525 #define BGP_CONFIG_DAMPENING (1 << 0)
526 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
527 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
528 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
529 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
530 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
531 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
532 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
533 /* import/export between address families */
534 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
535 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
536 /* vrf-route leaking flags */
537 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
538 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
539 /* vpnvx retain flag */
540 #define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
541
542 /* BGP per AF peer count */
543 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
544
545 /* Tree for next-hop lookup cache. */
546 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
547
548 /* Tree for import-check */
549 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
550
551 struct bgp_table *connected_table[AFI_MAX];
552
553 struct hash *address_hash;
554
555 /* DB for all local tunnel-ips - used mainly for martian checks
556 Currently it only has all VxLan tunnel IPs*/
557 struct hash *tip_hash;
558
559 /* Static route configuration. */
560 struct bgp_table *route[AFI_MAX][SAFI_MAX];
561
562 /* Aggregate address configuration. */
563 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
564
565 /* BGP routing information base. */
566 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
567
568 /* BGP table route-map. */
569 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
570
571 /* BGP redistribute configuration. */
572 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
573
574 /* Allocate MPLS labels */
575 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
576
577 /* Allocate hash entries to store policy routing information
578 * The hash are used to host pbr rules somewhere.
579 * Actually, pbr will only be used by flowspec
580 * those hash elements will have relationship together as
581 * illustrated in below diagram:
582 *
583 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
584 * <----- pbr_match j <--- pbr_match_entry 1..m
585 * <----- pbr_rule k
586 *
587 * - here in BGP structure, the list of match and actions will
588 * stand for the list of ipset sets, and table_ids in the kernel
589 * - the arrow above between pbr_match and pbr_action indicate
590 * that a backpointer permits match to find the action
591 * - the arrow betwen match_entry and match is a hash list
592 * contained in match, that lists the whole set of entries
593 */
594 struct hash *pbr_match_hash;
595 struct hash *pbr_rule_hash;
596 struct hash *pbr_action_hash;
597
598 /* timer to re-evaluate neighbor default-originate route-maps */
599 struct thread *t_rmap_def_originate_eval;
600 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
601
602 /* BGP distance configuration. */
603 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
604 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
605 uint8_t distance_local[AFI_MAX][SAFI_MAX];
606
607 /* BGP default local-preference. */
608 uint32_t default_local_pref;
609
610 /* BGP default subgroup pkt queue max */
611 uint32_t default_subgroup_pkt_queue_max;
612
613 /* BGP default timer. */
614 uint32_t default_holdtime;
615 uint32_t default_keepalive;
616 uint32_t default_connect_retry;
617 uint32_t default_delayopen;
618
619 /* BGP minimum holdtime. */
620 uint16_t default_min_holdtime;
621
622 /* BGP graceful restart */
623 uint32_t restart_time;
624 uint32_t stalepath_time;
625 uint32_t select_defer_time;
626 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
627 uint32_t rib_stale_time;
628
629 /* BGP Long-lived Graceful Restart */
630 uint32_t llgr_stale_time;
631
632 #define BGP_ROUTE_SELECT_DELAY 1
633 #define BGP_MAX_BEST_ROUTE_SELECT 10000
634 /* Maximum-paths configuration */
635 struct bgp_maxpaths_cfg {
636 uint16_t maxpaths_ebgp;
637 uint16_t maxpaths_ibgp;
638 bool same_clusterlen;
639 } maxpaths[AFI_MAX][SAFI_MAX];
640
641 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
642 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
643
644 /* Automatic coalesce adjust on/off */
645 bool heuristic_coalesce;
646 /* Actual coalesce time */
647 uint32_t coalesce_time;
648
649 /* Auto-shutdown new peers */
650 bool autoshutdown;
651
652 struct bgp_addpath_bgp_data tx_addpath;
653
654 #ifdef ENABLE_BGP_VNC
655 struct rfapi_cfg *rfapi_cfg;
656 struct rfapi *rfapi;
657 #endif
658
659 /* EVPN related information */
660
661 /* EVI hash table */
662 struct hash *vnihash;
663
664 /*
665 * VNI hash table based on SVI ifindex as its key.
666 * We use SVI ifindex as key to lookup a VNI table for gateway IP
667 * overlay index recursive lookup.
668 * For this purpose, a hashtable is added which optimizes this lookup.
669 */
670 struct hash *vni_svi_hash;
671
672 /* EVPN enable - advertise gateway macip routes */
673 int advertise_gw_macip;
674
675 /* EVPN enable - advertise local VNIs and their MACs etc. */
676 int advertise_all_vni;
677
678 /* draft-ietf-idr-deprecate-as-set-confed-set
679 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
680 */
681 bool reject_as_sets;
682
683 struct bgp_evpn_info *evpn_info;
684
685 /* EVPN - use RFC 8365 to auto-derive RT */
686 int advertise_autort_rfc8365;
687
688 /*
689 * Flooding mechanism for BUM packets for VxLAN-EVPN.
690 */
691 enum vxlan_flood_control vxlan_flood_ctrl;
692
693 /* Hash table of Import RTs to EVIs */
694 struct hash *import_rt_hash;
695
696 /* Hash table of VRF import RTs to VRFs */
697 struct hash *vrf_import_rt_hash;
698
699 /* L3-VNI corresponding to this vrf */
700 vni_t l3vni;
701
702 /* router-mac to be used in mac-ip routes for this vrf */
703 struct ethaddr rmac;
704
705 /* originator ip - to be used as NH for type-5 routes */
706 struct in_addr originator_ip;
707
708 /* SVI associated with the L3-VNI corresponding to this vrf */
709 ifindex_t l3vni_svi_ifindex;
710
711 /* RB tree of ES-VRFs */
712 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
713
714 /* Hash table of EVPN nexthops maintained per-tenant-VRF */
715 struct hash *evpn_nh_table;
716
717 /*
718 * Flag resolve_overlay_index is used for recursive resolution
719 * procedures for EVPN type-5 route's gateway IP overlay index.
720 * When this flag is set, we build remote-ip-hash for
721 * all L2VNIs and resolve overlay index nexthops using this hash.
722 * Overlay index nexthops remain unresolved if this flag is not set.
723 */
724 bool resolve_overlay_index;
725
726 /* vrf flags */
727 uint32_t vrf_flags;
728 #define BGP_VRF_AUTO (1 << 0)
729 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
730 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
731 #define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
732 #define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
733 #define BGP_VRF_RD_CFGD (1 << 5)
734 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
735 /* per-VRF toVPN SID */
736 #define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
737
738 /* unique ID for auto derivation of RD for this vrf */
739 uint16_t vrf_rd_id;
740
741 /* Automatically derived RD for this VRF */
742 struct prefix_rd vrf_prd_auto;
743
744 /* RD for this VRF */
745 struct prefix_rd vrf_prd;
746
747 /* import rt list for the vrf instance */
748 struct list *vrf_import_rtl;
749
750 /* export rt list for the vrf instance */
751 struct list *vrf_export_rtl;
752
753 /* list of corresponding l2vnis (struct bgpevpn) */
754 struct list *l2vnis;
755
756 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
757 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
758
759 struct vpn_policy vpn_policy[AFI_MAX];
760
761 struct bgp_pbr_config *bgp_pbr_cfg;
762
763 /* Count of peers in established state */
764 uint32_t established_peers;
765
766 /* Weighted ECMP related config. */
767 enum bgp_link_bw_handling lb_handling;
768
769 /* Process Queue for handling routes */
770 struct work_queue *process_queue;
771
772 bool fast_convergence;
773
774 /* BGP Conditional advertisement */
775 uint32_t condition_check_period;
776 uint32_t condition_filter_count;
777 struct thread *t_condition_check;
778
779 /* BGP VPN SRv6 backend */
780 bool srv6_enabled;
781 char srv6_locator_name[SRV6_LOCNAME_SIZE];
782 struct list *srv6_locator_chunks;
783 struct list *srv6_functions;
784 uint32_t tovpn_sid_index; /* unset => set to 0 */
785 struct in6_addr *tovpn_sid;
786 struct srv6_locator_chunk *tovpn_sid_locator;
787 uint32_t tovpn_sid_transpose_label;
788 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
789
790 /* TCP keepalive parameters for BGP connection */
791 uint16_t tcp_keepalive_idle;
792 uint16_t tcp_keepalive_intvl;
793 uint16_t tcp_keepalive_probes;
794
795 struct timeval ebgprequirespolicywarning;
796 #define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
797
798 bool allow_martian;
799
800 QOBJ_FIELDS;
801 };
802 DECLARE_QOBJ_TYPE(bgp);
803
804 struct bgp_interface {
805 #define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
806 uint32_t flags;
807 };
808
809 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
810 DECLARE_HOOK(bgp_inst_config_write,
811 (struct bgp *bgp, struct vty *vty),
812 (bgp, vty));
813 DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
814
815 /* Thread callback information */
816 struct afi_safi_info {
817 afi_t afi;
818 safi_t safi;
819 struct bgp *bgp;
820 };
821
822 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
823
824 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
825 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
826 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
827 && bgp->vrf_id != VRF_UNKNOWN))
828
829 #define BGP_SELECT_DEFER_DISABLE(bgp) \
830 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
831
832 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
833 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
834 || bm->wait_for_fib)
835
836 /* BGP peer-group support. */
837 struct peer_group {
838 /* Name of the peer-group. */
839 char *name;
840
841 /* Pointer to BGP. */
842 struct bgp *bgp;
843
844 /* Peer-group client list. */
845 struct list *peer;
846
847 /** Dynamic neighbor listening ranges */
848 struct list *listen_range[AFI_MAX];
849
850 /* Peer-group config */
851 struct peer *conf;
852 };
853
854 /* BGP Notify message format. */
855 struct bgp_notify {
856 uint8_t code;
857 uint8_t subcode;
858 char *data;
859 bgp_size_t length;
860 uint8_t *raw_data;
861 bool hard_reset;
862 };
863
864 /* Next hop self address. */
865 struct bgp_nexthop {
866 struct interface *ifp;
867 struct in_addr v4;
868 struct in6_addr v6_global;
869 struct in6_addr v6_local;
870 };
871
872 /* BGP addpath values */
873 #define BGP_ADDPATH_RX 1
874 #define BGP_ADDPATH_TX 2
875 #define BGP_ADDPATH_ID_LEN 4
876
877 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
878
879 /* Route map direction */
880 #define RMAP_IN 0
881 #define RMAP_OUT 1
882 #define RMAP_MAX 2
883
884 #define BGP_DEFAULT_TTL 1
885 #define BGP_GTSM_HOPS_DISABLED 0
886 #define BGP_GTSM_HOPS_CONNECTED 1
887
888 /* Advertise map */
889 #define CONDITION_NON_EXIST false
890 #define CONDITION_EXIST true
891
892 enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
893
894 #include "filter.h"
895
896 /* BGP filter structure. */
897 struct bgp_filter {
898 /* Distribute-list. */
899 struct {
900 char *name;
901 struct access_list *alist;
902 } dlist[FILTER_MAX];
903
904 /* Prefix-list. */
905 struct {
906 char *name;
907 struct prefix_list *plist;
908 } plist[FILTER_MAX];
909
910 /* Filter-list. */
911 struct {
912 char *name;
913 struct as_list *aslist;
914 } aslist[FILTER_MAX];
915
916 /* Route-map. */
917 struct {
918 char *name;
919 struct route_map *map;
920 } map[RMAP_MAX];
921
922 /* Unsuppress-map. */
923 struct {
924 char *name;
925 struct route_map *map;
926 } usmap;
927
928 /* Advertise-map */
929 struct {
930 char *aname;
931 struct route_map *amap;
932
933 bool condition;
934
935 char *cname;
936 struct route_map *cmap;
937
938 enum update_type update_type;
939 } advmap;
940 };
941
942 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
943 a peer who's AS is part of our Confederation. */
944 enum bgp_peer_sort {
945 BGP_PEER_UNSPECIFIED,
946 BGP_PEER_IBGP,
947 BGP_PEER_EBGP,
948 BGP_PEER_INTERNAL,
949 BGP_PEER_CONFED,
950 };
951
952 /* BGP message header and packet size. */
953 #define BGP_MARKER_SIZE 16
954 #define BGP_HEADER_SIZE 19
955 #define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
956 #define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
957 #define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
958 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
959
960 /*
961 * Trigger delay for bgp_announce_route().
962 */
963 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
964 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
965
966 struct peer_af {
967 /* back pointer to the peer */
968 struct peer *peer;
969
970 /* which subgroup the peer_af belongs to */
971 struct update_subgroup *subgroup;
972
973 /* for being part of an update subgroup's peer list */
974 LIST_ENTRY(peer_af) subgrp_train;
975
976 /* for being part of a packet's peer list */
977 LIST_ENTRY(peer_af) pkt_train;
978
979 struct bpacket *next_pkt_to_send;
980
981 /*
982 * Trigger timer for bgp_announce_route().
983 */
984 struct thread *t_announce_route;
985
986 afi_t afi;
987 safi_t safi;
988 int afid;
989 };
990 /* BGP GR per peer ds */
991
992 #define BGP_PEER_GR_MODE 5
993 #define BGP_PEER_GR_EVENT_CMD 6
994
995 enum peer_mode {
996 PEER_HELPER = 0,
997 PEER_GR,
998 PEER_DISABLE,
999 PEER_INVALID,
1000 PEER_GLOBAL_INHERIT /* This is the default mode */
1001
1002 };
1003
1004 enum peer_gr_command {
1005 PEER_GR_CMD = 0,
1006 NO_PEER_GR_CMD,
1007 PEER_DISABLE_CMD,
1008 NO_PEER_DISABLE_CMD,
1009 PEER_HELPER_CMD,
1010 NO_PEER_HELPER_CMD
1011 };
1012
1013 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
1014
1015 struct bgp_peer_gr {
1016 enum peer_mode next_state;
1017 bgp_peer_gr_action_ptr action_fun;
1018 };
1019
1020 /*
1021 * BGP FSM event codes, per RFC 4271 ss. 8.1
1022 */
1023 enum bgp_fsm_rfc_codes {
1024 BGP_FSM_ManualStart = 1,
1025 BGP_FSM_ManualStop = 2,
1026 BGP_FSM_AutomaticStart = 3,
1027 BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
1028 BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
1029 BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
1030 BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
1031 7,
1032 BGP_FSM_AutomaticStop = 8,
1033 BGP_FSM_ConnectRetryTimer_Expires = 9,
1034 BGP_FSM_HoldTimer_Expires = 10,
1035 BGP_FSM_KeepaliveTimer_Expires = 11,
1036 BGP_FSM_DelayOpenTimer_Expires = 12,
1037 BGP_FSM_IdleHoldTimer_Expires = 13,
1038 BGP_FSM_TcpConnection_Valid = 14,
1039 BGP_FSM_Tcp_CR_Invalid = 15,
1040 BGP_FSM_Tcp_CR_Acked = 16,
1041 BGP_FSM_TcpConnectionConfirmed = 17,
1042 BGP_FSM_TcpConnectionFails = 18,
1043 BGP_FSM_BGPOpen = 19,
1044 BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
1045 BGP_FSM_BGPHeaderErr = 21,
1046 BGP_FSM_BGPOpenMsgErr = 22,
1047 BGP_FSM_OpenCollisionDump = 23,
1048 BGP_FSM_NotifMsgVerErr = 24,
1049 BGP_FSM_NotifMsg = 25,
1050 BGP_FSM_KeepAliveMsg = 26,
1051 BGP_FSM_UpdateMsg = 27,
1052 BGP_FSM_UpdateMsgErr = 28
1053 };
1054
1055 /*
1056 * BGP finite state machine events
1057 *
1058 * Note: these do not correspond to RFC-defined event codes. Those are
1059 * defined elsewhere.
1060 */
1061 enum bgp_fsm_events {
1062 BGP_Start = 1,
1063 BGP_Stop,
1064 TCP_connection_open,
1065 TCP_connection_open_w_delay,
1066 TCP_connection_closed,
1067 TCP_connection_open_failed,
1068 TCP_fatal_error,
1069 ConnectRetry_timer_expired,
1070 Hold_Timer_expired,
1071 KeepAlive_timer_expired,
1072 DelayOpen_timer_expired,
1073 Receive_OPEN_message,
1074 Receive_KEEPALIVE_message,
1075 Receive_UPDATE_message,
1076 Receive_NOTIFICATION_message,
1077 Clearing_Completed,
1078 BGP_EVENTS_MAX,
1079 };
1080
1081 /* BGP finite state machine status. */
1082 enum bgp_fsm_status {
1083 Idle = 1,
1084 Connect,
1085 Active,
1086 OpenSent,
1087 OpenConfirm,
1088 Established,
1089 Clearing,
1090 Deleted,
1091 BGP_STATUS_MAX,
1092 };
1093
1094 #define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
1095
1096 struct llgr_info {
1097 uint32_t stale_time;
1098 uint8_t flags;
1099 };
1100
1101 /* BGP neighbor structure. */
1102 struct peer {
1103 /* BGP structure. */
1104 struct bgp *bgp;
1105
1106 /* reference count, primarily to allow bgp_process'ing of route_node's
1107 * to be done after a struct peer is deleted.
1108 *
1109 * named 'lock' for hysterical reasons within Quagga.
1110 */
1111 int lock;
1112
1113 /* BGP peer group. */
1114 struct peer_group *group;
1115 uint64_t version[AFI_MAX][SAFI_MAX];
1116
1117 /* BGP peer_af structures, per configured AF on this peer */
1118 struct peer_af *peer_af_array[BGP_AF_MAX];
1119
1120 /* Peer's remote AS number. */
1121 int as_type;
1122 as_t as;
1123
1124 /* Peer's local AS number. */
1125 as_t local_as;
1126
1127 enum bgp_peer_sort sort;
1128
1129 /* Peer's Change local AS number. */
1130 as_t change_local_as;
1131
1132 /* Remote router ID. */
1133 struct in_addr remote_id;
1134
1135 /* Local router ID. */
1136 struct in_addr local_id;
1137
1138 /* Packet receive and send buffer. */
1139 pthread_mutex_t io_mtx; // guards ibuf, obuf
1140 struct stream_fifo *ibuf; // packets waiting to be processed
1141 struct stream_fifo *obuf; // packets waiting to be written
1142
1143 /* used as a block to deposit raw wire data to */
1144 uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
1145 * BGP_READ_PACKET_MAX];
1146 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
1147 struct stream *obuf_work; // WiP buffer used to construct packets
1148
1149 struct stream *curr; // the current packet being parsed
1150
1151 /* We use a separate stream to encode MP_REACH_NLRI for efficient
1152 * NLRI packing. peer->obuf_work stores all the other attributes. The
1153 * actual packet is then constructed by concatenating the two.
1154 */
1155 struct stream *scratch;
1156
1157 /* the doppelganger peer structure, due to dual TCP conn setup */
1158 struct peer *doppelganger;
1159
1160 /* Status of the peer. */
1161 enum bgp_fsm_status status;
1162 enum bgp_fsm_status ostatus;
1163
1164 /* FSM events, stored for debug purposes.
1165 * Note: uchar used for reduced memory usage.
1166 */
1167 enum bgp_fsm_events cur_event;
1168 enum bgp_fsm_events last_event;
1169 enum bgp_fsm_events last_major_event;
1170
1171 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1172 uint16_t table_dump_index;
1173
1174 /* Peer information */
1175 int fd; /* File descriptor */
1176 int ttl; /* TTL of TCP connection to the peer. */
1177 int rtt; /* Estimated round-trip-time from TCP_INFO */
1178 int rtt_expected; /* Expected round-trip-time for a peer */
1179 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1180 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1181 int gtsm_hops; /* minimum hopcount to peer */
1182 char *desc; /* Description of the peer. */
1183 unsigned short port; /* Destination port for peer */
1184 char *host; /* Printable address of the peer. */
1185 union sockunion su; /* Sockunion address of the peer. */
1186 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1187 time_t uptime; /* Last Up/Down time */
1188 time_t readtime; /* Last read time */
1189 time_t resettime; /* Last reset time */
1190
1191 char *conf_if; /* neighbor interface config name. */
1192 struct interface *ifp; /* corresponding interface */
1193 char *ifname; /* bind interface name. */
1194 char *update_if;
1195 union sockunion *update_source;
1196
1197 union sockunion *su_local; /* Sockunion of local address. */
1198 union sockunion *su_remote; /* Sockunion of remote address. */
1199 int shared_network; /* Is this peer shared same network. */
1200 struct bgp_nexthop nexthop; /* Nexthop */
1201
1202 /* Roles in bgp session */
1203 uint8_t local_role;
1204 uint8_t remote_role;
1205 #define ROLE_PROVIDER 0
1206 #define ROLE_RS_SERVER 1
1207 #define ROLE_RS_CLIENT 2
1208 #define ROLE_CUSTOMER 3
1209 #define ROLE_PEER 4
1210 #define ROLE_UNDEFINED 255
1211
1212 #define ROLE_NAME_MAX_LEN 20
1213
1214 /* Peer address family configuration. */
1215 uint8_t afc[AFI_MAX][SAFI_MAX];
1216 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1217 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1218 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1219
1220 /* Capability flags (reset in bgp_stop) */
1221 uint32_t cap;
1222 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1223 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1224 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1225 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1226 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1227 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1228 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1229 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1230 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1231 /* sent graceful-restart restart (R) bit */
1232 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
1233 /* received graceful-restart restart (R) bit */
1234 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
1235 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1236 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1237 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1238 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1239 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1240 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1241 #define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
1242 #define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
1243 #define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
1244 #define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
1245 #define PEER_CAP_LLGR_ADV (1U << 21)
1246 #define PEER_CAP_LLGR_RCV (1U << 22)
1247 /* sent graceful-restart notification (N) bit */
1248 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
1249 /* received graceful-restart notification (N) bit */
1250 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
1251 #define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
1252 #define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
1253 #define PEER_CAP_SOFT_VERSION_ADV (1U << 27)
1254 #define PEER_CAP_SOFT_VERSION_RCV (1U << 28)
1255
1256 /* Capability flags (reset in bgp_stop) */
1257 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1258 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1259 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1260 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1261 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1262 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1263 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1264 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1265 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1266 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1267 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1268 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1269 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1270 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1271 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1272 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1273 #define PEER_CAP_LLGR_AF_ADV (1U << 15)
1274 #define PEER_CAP_LLGR_AF_RCV (1U << 16)
1275
1276 /* Global configuration flags. */
1277 /*
1278 * Parallel array to flags that indicates whether each flag originates
1279 * from a peer-group or if it is config that is specific to this
1280 * individual peer. If a flag is set independent of the peer-group, the
1281 * same bit should be set here. If this peer is a peer-group, this
1282 * memory region should be all zeros.
1283 *
1284 * The assumption is that the default state for all flags is unset,
1285 * so if a flag is unset, the corresponding override flag is unset too.
1286 * However if a flag is set, the corresponding override flag is set.
1287 */
1288 uint32_t flags_override;
1289 /*
1290 * Parallel array to flags that indicates whether the default behavior
1291 * of *flags_override* should be inverted. If a flag is unset and the
1292 * corresponding invert flag is set, the corresponding override flag
1293 * would be set. However if a flag is set and the corresponding invert
1294 * flag is unset, the corresponding override flag would be unset.
1295 *
1296 * This can be used for attributes like *send-community*, which are
1297 * implicitely enabled and have to be disabled explicitely, compared to
1298 * 'normal' attributes like *next-hop-self* which are implicitely set.
1299 *
1300 * All operations dealing with flags should apply the following boolean
1301 * logic to keep the internal flag system in a sane state:
1302 *
1303 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1304 * value=0 invert=1 Unset flag unconditionally
1305 * value=1 invert=0 Set flag unconditionally
1306 * value=1 invert=1 Inherit flag if member, otherwise set flag
1307 *
1308 * Contrary to the implementation of *flags_override*, the flag
1309 * inversion state can be set either on the peer OR the peer *and* the
1310 * peer-group. This was done on purpose, as the inversion state of a
1311 * flag can be determined on either the peer or the peer-group.
1312 *
1313 * Example: Enabling the cisco configuration mode inverts all flags
1314 * related to *send-community* unconditionally for both peer-groups and
1315 * peers.
1316 *
1317 * This behavior is different for interface peers though, which enable
1318 * the *extended-nexthop* flag by default, which regular peers do not.
1319 * As the peer-group can contain both regular and interface peers, the
1320 * flag inversion state must be set on the peer only.
1321 *
1322 * When a peer inherits the configuration from a peer-group and the
1323 * inversion state of the flag differs between peer and peer-group, the
1324 * newly set value must equal to the inverted state of the peer-group.
1325 */
1326 uint32_t flags_invert;
1327 /*
1328 * Effective array for storing the peer/peer-group flags. In case of a
1329 * peer-group, the peer-specific overrides (see flags_override and
1330 * flags_invert) must be respected.
1331 */
1332 uint64_t flags;
1333 #define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
1334 #define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
1335 #define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
1336 #define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
1337 #define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
1338 #define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
1339 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
1340 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
1341 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
1342 #define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
1343 #define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
1344 #define PEER_FLAG_LONESOUL (1ULL << 11)
1345 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
1346 #define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
1347 #define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
1348 #define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
1349 #define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
1350 #define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
1351 #define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
1352 #define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
1353 #define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
1354 #define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
1355 #define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
1356
1357 /* BGP-GR Peer related flags */
1358 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
1359 #define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
1360 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
1361 #define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
1362 #define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
1363 #define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
1364 /* Disable IEEE floating-point link bandwidth encoding in
1365 * extended communities.
1366 */
1367 #define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
1368 /* force the extended format for Optional Parameters in OPEN message */
1369 #define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
1370
1371 /* BGP Open Policy flags.
1372 * Enforce using roles on both sides:
1373 * `local-role ROLE strict-mode` configured.
1374 */
1375 #define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
1376 /* `local-role` configured */
1377 #define PEER_FLAG_ROLE (1ULL << 32)
1378 #define PEER_FLAG_PORT (1ULL << 33)
1379 #define PEER_FLAG_AIGP (1ULL << 34)
1380 #define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
1381 #define PEER_FLAG_CAPABILITY_SOFT_VERSION (1ULL << 36)
1382
1383 /*
1384 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1385 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1386 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1387 */
1388
1389 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1390 enum peer_mode peer_gr_present_state;
1391 /* Non stop forwarding afi-safi count for BGP gr feature*/
1392 uint8_t nsf_af_count;
1393
1394 uint8_t peer_gr_new_status_flag;
1395 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1396 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1397 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1398
1399 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1400 char *tx_shutdown_message;
1401
1402 /* NSF mode (graceful restart) */
1403 uint8_t nsf[AFI_MAX][SAFI_MAX];
1404 /* EOR Send time */
1405 time_t eor_stime[AFI_MAX][SAFI_MAX];
1406 /* Last update packet sent time */
1407 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1408
1409 /* Peer Per AF flags */
1410 /*
1411 * Please consult the comments for *flags_override*, *flags_invert* and
1412 * *flags* to understand what these three arrays do. The address-family
1413 * specific attributes are being treated the exact same way as global
1414 * peer attributes.
1415 */
1416 uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
1417 uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
1418 uint64_t af_flags[AFI_MAX][SAFI_MAX];
1419 #define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
1420 #define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
1421 #define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
1422 #define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
1423 #define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
1424 #define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
1425 #define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
1426 #define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
1427 #define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
1428 #define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
1429 #define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
1430 #define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
1431 #define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
1432 #define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
1433 #define PEER_FLAG_MAX_PREFIX (1ULL << 14)
1434 #define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
1435 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
1436 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
1437 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
1438 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
1439 #define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
1440 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
1441 #define PEER_FLAG_WEIGHT (1ULL << 24)
1442 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 25)
1443 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 26)
1444 #define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 27)
1445 #define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 28)
1446 #define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 29)
1447 #define PEER_FLAG_SOO (1ULL << 30)
1448 #define PEER_FLAG_ACCEPT_OWN (1ULL << 31)
1449
1450 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1451
1452 /* MD5 password */
1453 char *password;
1454
1455 /* default-originate route-map. */
1456 struct {
1457 char *name;
1458 struct route_map *map;
1459 } default_rmap[AFI_MAX][SAFI_MAX];
1460
1461 /* Peer status flags. */
1462 uint16_t sflags;
1463 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1464 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1465 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1466 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1467 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1468 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1469 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1470 /* received extended format encoding for OPEN message */
1471 #define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
1472
1473 /* Peer status af flags (reset in bgp_stop) */
1474 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1475 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1476 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1477 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1478 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1479 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1480 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1481 #define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
1482 #define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
1483 #define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
1484 #define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
1485 #define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
1486 /* LLGR aware peer */
1487 #define PEER_STATUS_LLGR_WAIT (1U << 11)
1488 #define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
1489 #define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
1490
1491 /* Configured timer values. */
1492 _Atomic uint32_t holdtime;
1493 _Atomic uint32_t keepalive;
1494 _Atomic uint32_t connect;
1495 _Atomic uint32_t routeadv;
1496 _Atomic uint32_t delayopen;
1497
1498 /* Timer values. */
1499 _Atomic uint32_t v_start;
1500 _Atomic uint32_t v_connect;
1501 _Atomic uint32_t v_holdtime;
1502 _Atomic uint32_t v_keepalive;
1503 _Atomic uint32_t v_routeadv;
1504 _Atomic uint32_t v_delayopen;
1505 _Atomic uint32_t v_pmax_restart;
1506 _Atomic uint32_t v_gr_restart;
1507
1508 /* Threads. */
1509 struct thread *t_read;
1510 struct thread *t_write;
1511 struct thread *t_start;
1512 struct thread *t_connect_check_r;
1513 struct thread *t_connect_check_w;
1514 struct thread *t_connect;
1515 struct thread *t_holdtime;
1516 struct thread *t_routeadv;
1517 struct thread *t_delayopen;
1518 struct thread *t_pmax_restart;
1519 struct thread *t_gr_restart;
1520 struct thread *t_gr_stale;
1521 struct thread *t_llgr_stale[AFI_MAX][SAFI_MAX];
1522 struct thread *t_revalidate_all[AFI_MAX][SAFI_MAX];
1523 struct thread *t_generate_updgrp_packets;
1524 struct thread *t_process_packet;
1525 struct thread *t_process_packet_error;
1526 struct thread *t_refresh_stalepath;
1527
1528 /* Thread flags. */
1529 _Atomic uint32_t thread_flags;
1530 #define PEER_THREAD_WRITES_ON (1U << 0)
1531 #define PEER_THREAD_READS_ON (1U << 1)
1532 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1533 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1534
1535 /* workqueues */
1536 struct work_queue *clear_node_queue;
1537
1538 #define PEER_TOTAL_RX(peer) \
1539 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1540 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1541 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1542 + atomic_load_explicit(&peer->refresh_in, \
1543 memory_order_relaxed) \
1544 + atomic_load_explicit(&peer->keepalive_in, \
1545 memory_order_relaxed) \
1546 + atomic_load_explicit(&peer->dynamic_cap_in, \
1547 memory_order_relaxed)
1548
1549 #define PEER_TOTAL_TX(peer) \
1550 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1551 + atomic_load_explicit(&peer->update_out, \
1552 memory_order_relaxed) \
1553 + atomic_load_explicit(&peer->notify_out, \
1554 memory_order_relaxed) \
1555 + atomic_load_explicit(&peer->refresh_out, \
1556 memory_order_relaxed) \
1557 + atomic_load_explicit(&peer->keepalive_out, \
1558 memory_order_relaxed) \
1559 + atomic_load_explicit(&peer->dynamic_cap_out, \
1560 memory_order_relaxed)
1561
1562 /* Statistics field */
1563 _Atomic uint32_t open_in; /* Open message input count */
1564 _Atomic uint32_t open_out; /* Open message output count */
1565 _Atomic uint32_t update_in; /* Update message input count */
1566 _Atomic uint32_t update_out; /* Update message ouput count */
1567 _Atomic time_t update_time; /* Update message received time. */
1568 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1569 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1570 _Atomic uint32_t notify_in; /* Notify input count */
1571 _Atomic uint32_t notify_out; /* Notify output count */
1572 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1573 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1574 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1575 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1576
1577 uint32_t stat_pfx_filter;
1578 uint32_t stat_pfx_aspath_loop;
1579 uint32_t stat_pfx_originator_loop;
1580 uint32_t stat_pfx_cluster_loop;
1581 uint32_t stat_pfx_nh_invalid;
1582 uint32_t stat_pfx_dup_withdraw;
1583 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1584
1585 /* BGP state count */
1586 uint32_t established; /* Established */
1587 uint32_t dropped; /* Dropped */
1588
1589 /* Update delay related fields */
1590 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1591 for EOR */
1592
1593 /* Syncronization list and time. */
1594 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1595 time_t synctime;
1596 /* timestamp when the last UPDATE msg was written */
1597 _Atomic time_t last_write;
1598 /* timestamp when the last msg was written */
1599 _Atomic time_t last_update;
1600
1601 /* only updated under io_mtx.
1602 * last_sendq_warn is only for ratelimiting log warning messages.
1603 */
1604 time_t last_sendq_ok, last_sendq_warn;
1605
1606 /* Notify data. */
1607 struct bgp_notify notify;
1608
1609 /* Filter structure. */
1610 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1611
1612 /*
1613 * Parallel array to filter that indicates whether each filter
1614 * originates from a peer-group or if it is config that is specific to
1615 * this individual peer. If a filter is set independent of the
1616 * peer-group the appropriate bit should be set here. If this peer is a
1617 * peer-group, this memory region should be all zeros. The assumption
1618 * is that the default state for all flags is unset. Due to filters
1619 * having a direction (e.g. in/out/...), this array has a third
1620 * dimension for storing the overrides independently per direction.
1621 *
1622 * Notes:
1623 * - if a filter for an individual peer is unset, the corresponding
1624 * override flag is unset and the peer is considered to be back in
1625 * sync with the peer-group.
1626 * - This does *not* contain the filter values, rather it contains
1627 * whether the filter in filter (struct bgp_filter) is peer-specific.
1628 */
1629 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1630 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1631 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1632 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1633 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1634 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1635 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1636
1637 /* ORF Prefix-list */
1638 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1639
1640 /* Text description of last attribute rcvd */
1641 char rcvd_attr_str[BUFSIZ];
1642
1643 /* Track if we printed the attribute in debugs */
1644 int rcvd_attr_printed;
1645
1646 /* Accepted prefix count */
1647 uint32_t pcount[AFI_MAX][SAFI_MAX];
1648
1649 /* Max prefix count. */
1650 uint32_t pmax[AFI_MAX][SAFI_MAX];
1651 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1652 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1653 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1654
1655 /* Send prefix count. */
1656 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1657
1658 /* allowas-in. */
1659 char allowas_in[AFI_MAX][SAFI_MAX];
1660
1661 /* soo */
1662 struct ecommunity *soo[AFI_MAX][SAFI_MAX];
1663
1664 /* weight */
1665 unsigned long weight[AFI_MAX][SAFI_MAX];
1666
1667 /* peer reset cause */
1668 uint8_t last_reset;
1669 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1670 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1671 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1672 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1673 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1674 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1675 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1676 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1677 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1678 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1679 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1680 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1681 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1682 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1683 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1684 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1685 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1686 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1687 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1688 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1689 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1690 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1691 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1692 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1693 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1694 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1695 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1696 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1697 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1698 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1699 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1700 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1701 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1702 #define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
1703 #define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
1704 /*
1705 * Remember to update peer_down_str in bgp_fsm.c when you add
1706 * a new value to the last_reset reason
1707 */
1708
1709 uint16_t last_reset_cause_size;
1710 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1711
1712 /* The kind of route-map Flags.*/
1713 uint16_t rmap_type;
1714 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1715 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1716 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1717 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1718 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1719 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1720 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1721 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1722 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1723
1724 /** Peer overwrite configuration. */
1725 struct bfd_session_config {
1726 /**
1727 * Manual configuration bit.
1728 *
1729 * This flag only makes sense for real peers (and not groups),
1730 * it keeps track if the user explicitly configured BFD for a
1731 * peer.
1732 */
1733 bool manual;
1734 /** Control Plane Independent. */
1735 bool cbit;
1736 /** Detection multiplier. */
1737 uint8_t detection_multiplier;
1738 /** Minimum required RX interval. */
1739 uint32_t min_rx;
1740 /** Minimum required TX interval. */
1741 uint32_t min_tx;
1742 /** Profile name. */
1743 char profile[BFD_PROFILE_NAME_LEN];
1744 /** Peer BFD session */
1745 struct bfd_session_params *session;
1746 } * bfd_config;
1747
1748 /* hostname and domainname advertised by host */
1749 char *hostname;
1750 char *domainname;
1751
1752 /* Sender side AS path loop detection. */
1753 bool as_path_loop_detection;
1754
1755 /* Extended Message Support */
1756 uint16_t max_packet_size;
1757
1758 /* Conditional advertisement */
1759 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1760 bool advmap_table_change;
1761
1762 /* set TCP max segment size */
1763 uint32_t tcp_mss;
1764
1765 /* Long-lived Graceful Restart */
1766 struct llgr_info llgr[AFI_MAX][SAFI_MAX];
1767
1768 bool shut_during_cfg;
1769
1770 #define BGP_ATTR_MAX 255
1771 /* Path attributes discard */
1772 bool discard_attrs[BGP_ATTR_MAX];
1773
1774 /* Path attributes treat-as-withdraw */
1775 bool withdraw_attrs[BGP_ATTR_MAX];
1776
1777 /* BGP Software Version Capability */
1778 #define BGP_MAX_SOFT_VERSION 64
1779 char *soft_version;
1780
1781 QOBJ_FIELDS;
1782 };
1783 DECLARE_QOBJ_TYPE(peer);
1784
1785 /* Inherit peer attribute from peer-group. */
1786 #define PEER_ATTR_INHERIT(peer, group, attr) \
1787 ((peer)->attr = (group)->conf->attr)
1788 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1789 do { \
1790 XFREE(mt, (peer)->attr); \
1791 if ((group)->conf->attr) \
1792 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1793 else \
1794 (peer)->attr = NULL; \
1795 } while (0)
1796 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1797 do { \
1798 if ((peer)->attr) \
1799 sockunion_free((peer)->attr); \
1800 if ((group)->conf->attr) \
1801 (peer)->attr = sockunion_dup((group)->conf->attr); \
1802 else \
1803 (peer)->attr = NULL; \
1804 } while (0)
1805
1806 /* Check if suppress start/restart of sessions to peer. */
1807 #define BGP_PEER_START_SUPPRESSED(P) \
1808 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
1809 CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
1810 CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
1811 (P)->shut_during_cfg)
1812
1813 #define PEER_ROUTE_ADV_DELAY(peer) \
1814 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1815
1816 #define PEER_PASSWORD_MINLEN (1)
1817 #define PEER_PASSWORD_MAXLEN (80)
1818
1819 /* This structure's member directly points incoming packet data
1820 stream. */
1821 struct bgp_nlri {
1822 /* AFI. */
1823 uint16_t afi; /* iana_afi_t */
1824
1825 /* SAFI. */
1826 uint8_t safi; /* iana_safi_t */
1827
1828 /* Pointer to NLRI byte stream. */
1829 uint8_t *nlri;
1830
1831 /* Length of whole NLRI. */
1832 bgp_size_t length;
1833 };
1834
1835 /* BGP versions. */
1836 #define BGP_VERSION_4 4
1837
1838 /* Default BGP port number. */
1839 #define BGP_PORT_DEFAULT 179
1840
1841 /* Extended BGP Administrative Shutdown Communication */
1842 #define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
1843
1844 /* BGP minimum message size. */
1845 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1846 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1847 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1848 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1849 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1850 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1851
1852 /* BGP message types. */
1853 #define BGP_MSG_OPEN 1
1854 #define BGP_MSG_UPDATE 2
1855 #define BGP_MSG_NOTIFY 3
1856 #define BGP_MSG_KEEPALIVE 4
1857 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1858 #define BGP_MSG_CAPABILITY 6
1859 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1860
1861 /* BGP open optional parameter. */
1862 #define BGP_OPEN_OPT_CAP 2
1863
1864 /* BGP4 attribute type codes. */
1865 #define BGP_ATTR_ORIGIN 1
1866 #define BGP_ATTR_AS_PATH 2
1867 #define BGP_ATTR_NEXT_HOP 3
1868 #define BGP_ATTR_MULTI_EXIT_DISC 4
1869 #define BGP_ATTR_LOCAL_PREF 5
1870 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1871 #define BGP_ATTR_AGGREGATOR 7
1872 #define BGP_ATTR_COMMUNITIES 8
1873 #define BGP_ATTR_ORIGINATOR_ID 9
1874 #define BGP_ATTR_CLUSTER_LIST 10
1875 #define BGP_ATTR_MP_REACH_NLRI 14
1876 #define BGP_ATTR_MP_UNREACH_NLRI 15
1877 #define BGP_ATTR_EXT_COMMUNITIES 16
1878 #define BGP_ATTR_AS4_PATH 17
1879 #define BGP_ATTR_AS4_AGGREGATOR 18
1880 #define BGP_ATTR_PMSI_TUNNEL 22
1881 #define BGP_ATTR_ENCAP 23
1882 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1883 #define BGP_ATTR_AIGP 26
1884 #define BGP_ATTR_LARGE_COMMUNITIES 32
1885 #define BGP_ATTR_OTC 35
1886 #define BGP_ATTR_PREFIX_SID 40
1887 #define BGP_ATTR_SRTE_COLOR 51
1888 #ifdef ENABLE_BGP_VNC_ATTR
1889 #define BGP_ATTR_VNC 255
1890 #endif
1891
1892 /* BGP update origin. */
1893 #define BGP_ORIGIN_IGP 0
1894 #define BGP_ORIGIN_EGP 1
1895 #define BGP_ORIGIN_INCOMPLETE 2
1896 #define BGP_ORIGIN_UNSPECIFIED 255
1897
1898 /* BGP notify message codes. */
1899 #define BGP_NOTIFY_HEADER_ERR 1
1900 #define BGP_NOTIFY_OPEN_ERR 2
1901 #define BGP_NOTIFY_UPDATE_ERR 3
1902 #define BGP_NOTIFY_HOLD_ERR 4
1903 #define BGP_NOTIFY_FSM_ERR 5
1904 #define BGP_NOTIFY_CEASE 6
1905 #define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
1906
1907 /* Subcodes for BGP Finite State Machine Error */
1908 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1909 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1910 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1911 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1912
1913 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1914
1915 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1916 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1917 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1918 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1919
1920 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1921 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1922 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1923 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1924 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1925 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1926 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1927 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1928 #define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
1929
1930 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1931 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1932 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1933 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1934 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1935 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1936 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1937 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1938 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1939 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1940 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1941
1942 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1943 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1944 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1945 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1946 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1947 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1948 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1949 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1950 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1951 #define BGP_NOTIFY_CEASE_HARD_RESET 9
1952 #define BGP_NOTIFY_CEASE_BFD_DOWN 10
1953
1954 /* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
1955 #define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
1956
1957 /* BGP route refresh optional subtypes. */
1958 #define BGP_ROUTE_REFRESH_NORMAL 0
1959 #define BGP_ROUTE_REFRESH_BORR 1
1960 #define BGP_ROUTE_REFRESH_EORR 2
1961
1962 /* BGP timers default value. */
1963 #define BGP_INIT_START_TIMER 1
1964 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1965 * version-/profile-specific values. The values here do not matter, they only
1966 * exist to provide a clear layering separation between core and CLI.
1967 */
1968 #define BGP_DEFAULT_HOLDTIME 180
1969 #define BGP_DEFAULT_KEEPALIVE 60
1970 #define BGP_DEFAULT_CONNECT_RETRY 120
1971
1972 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1973 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1974
1975 /* BGP RFC 4271 DelayOpenTime default value */
1976 #define BGP_DEFAULT_DELAYOPEN 120
1977
1978 /* BGP default local preference. */
1979 #define BGP_DEFAULT_LOCAL_PREF 100
1980
1981 /* BGP local-preference to send when 'bgp graceful-shutdown'
1982 * is configured */
1983 #define BGP_GSHUT_LOCAL_PREF 0
1984
1985 /* BGP default subgroup packet queue max . */
1986 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1987
1988 /* BGP graceful restart */
1989 #define BGP_DEFAULT_RESTART_TIME 120
1990 #define BGP_DEFAULT_STALEPATH_TIME 360
1991 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1992 #define BGP_DEFAULT_RIB_STALE_TIME 500
1993 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
1994
1995 /* BGP Long-lived Graceful Restart */
1996 #define BGP_DEFAULT_LLGR_STALE_TIME 0
1997
1998 /* BGP uptime string length. */
1999 #define BGP_UPTIME_LEN 25
2000
2001 /* Default configuration settings for bgpd. */
2002 #define BGP_VTY_PORT 2605
2003 #define BGP_DEFAULT_CONFIG "bgpd.conf"
2004
2005 /* BGP Dynamic Neighbors feature */
2006 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
2007 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
2008 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
2009
2010 /* BGP AIGP */
2011 #define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
2012 #define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
2013 #define BGP_AIGP_TLV_METRIC_LEN 11
2014 #define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
2015 #define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
2016
2017 /* Flag for peer_clear_soft(). */
2018 enum bgp_clear_type {
2019 BGP_CLEAR_SOFT_NONE,
2020 BGP_CLEAR_SOFT_OUT,
2021 BGP_CLEAR_SOFT_IN,
2022 BGP_CLEAR_SOFT_BOTH,
2023 BGP_CLEAR_SOFT_IN_ORF_PREFIX,
2024 BGP_CLEAR_MESSAGE_STATS
2025 };
2026
2027 /* Macros. */
2028 #define BGP_INPUT(P) ((P)->curr)
2029 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
2030 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
2031 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
2032
2033 /* BGP error codes. */
2034 enum bgp_create_error_code {
2035 BGP_SUCCESS = 0,
2036 BGP_CREATED = 1,
2037 BGP_ERR_INVALID_VALUE = -1,
2038 BGP_ERR_INVALID_FLAG = -2,
2039 BGP_ERR_INVALID_AS = -3,
2040 BGP_ERR_PEER_GROUP_MEMBER = -4,
2041 BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
2042 BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
2043 BGP_ERR_PEER_GROUP_MISMATCH = -7,
2044 BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
2045 BGP_ERR_AS_MISMATCH = -9,
2046 BGP_ERR_PEER_FLAG_CONFLICT = -10,
2047 BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
2048 BGP_ERR_PEER_FILTER_CONFLICT = -12,
2049 BGP_ERR_NOT_INTERNAL_PEER = -13,
2050 BGP_ERR_REMOVE_PRIVATE_AS = -14,
2051 BGP_ERR_AF_UNCONFIGURED = -15,
2052 BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
2053 BGP_ERR_INSTANCE_MISMATCH = -17,
2054 BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
2055 BGP_ERR_TCPSIG_FAILED = -20,
2056 BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
2057 BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
2058 BGP_ERR_NO_INTERFACE_CONFIG = -23,
2059 BGP_ERR_AS_OVERRIDE = -25,
2060 BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
2061 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
2062 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
2063 BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
2064 BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
2065 BGP_ERR_PEER_SAFI_CONFLICT = -31,
2066
2067 /* BGP GR ERRORS */
2068 BGP_ERR_GR_INVALID_CMD = -32,
2069 BGP_ERR_GR_OPERATION_FAILED = -33,
2070 BGP_GR_NO_OPERATION = -34,
2071
2072 /*BGP Open Policy ERRORS */
2073 BGP_ERR_INVALID_ROLE_NAME = -35,
2074 BGP_ERR_INVALID_INTERNAL_ROLE = -36
2075 };
2076
2077 /*
2078 * Enumeration of different policy kinds a peer can be configured with.
2079 */
2080 enum bgp_policy_type {
2081 BGP_POLICY_ROUTE_MAP,
2082 BGP_POLICY_FILTER_LIST,
2083 BGP_POLICY_PREFIX_LIST,
2084 BGP_POLICY_DISTRIBUTE_LIST,
2085 };
2086
2087 /* peer_flag_change_type. */
2088 enum peer_change_type {
2089 peer_change_none,
2090 peer_change_reset,
2091 peer_change_reset_in,
2092 peer_change_reset_out,
2093 };
2094
2095 extern struct bgp_master *bm;
2096 extern unsigned int multipath_num;
2097
2098 /* Prototypes. */
2099 extern void bgp_terminate(void);
2100 extern void bgp_reset(void);
2101 extern void bgp_zclient_reset(void);
2102 extern struct bgp *bgp_get_default(void);
2103 extern struct bgp *bgp_lookup(as_t, const char *);
2104 extern struct bgp *bgp_lookup_by_name(const char *);
2105 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
2106 extern struct bgp *bgp_get_evpn(void);
2107 extern void bgp_set_evpn(struct bgp *bgp);
2108 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
2109 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
2110 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
2111 extern void bgp_peer_conf_if_to_su_update(struct peer *);
2112 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
2113 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
2114 extern struct peer_group *peer_group_get(struct bgp *, const char *);
2115 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
2116 union sockunion *,
2117 struct peer_group *);
2118 extern struct prefix *
2119 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
2120 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
2121 struct prefix *,
2122 struct prefix **);
2123 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
2124 union sockunion *);
2125
2126 /*
2127 * Peers are incredibly easy to memory leak
2128 * due to the various ways that they are actually used
2129 * Provide some functionality to debug locks and unlocks
2130 */
2131 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
2132 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
2133 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
2134 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
2135
2136 extern enum bgp_peer_sort peer_sort(struct peer *peer);
2137 extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
2138
2139 extern bool peer_active(struct peer *);
2140 extern bool peer_active_nego(struct peer *);
2141 extern bool peer_afc_received(struct peer *peer);
2142 extern bool peer_afc_advertised(struct peer *peer);
2143 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
2144 extern struct peer *peer_create(union sockunion *su, const char *conf_if,
2145 struct bgp *bgp, as_t local_as, as_t remote_as,
2146 int as_type, struct peer_group *group,
2147 bool config_node);
2148 extern struct peer *peer_create_accept(struct bgp *);
2149 extern void peer_xfer_config(struct peer *dst, struct peer *src);
2150 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
2151 json_object *json);
2152
2153 extern int bgp_config_write(struct vty *);
2154
2155 extern void bgp_master_init(struct thread_master *master, const int buffer_size,
2156 struct list *addresses);
2157
2158 extern void bgp_init(unsigned short instance);
2159 extern void bgp_pthreads_run(void);
2160 extern void bgp_pthreads_finish(void);
2161 extern void bgp_route_map_init(void);
2162 extern void bgp_session_reset(struct peer *);
2163
2164 extern int bgp_option_set(int);
2165 extern int bgp_option_unset(int);
2166 extern int bgp_option_check(int);
2167
2168 /* set the bgp no-rib option during runtime and remove installed routes */
2169 extern void bgp_option_norib_set_runtime(void);
2170
2171 /* unset the bgp no-rib option during runtime and reset all peers */
2172 extern void bgp_option_norib_unset_runtime(void);
2173
2174 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
2175 extern void bgp_instance_up(struct bgp *);
2176 extern void bgp_instance_down(struct bgp *);
2177 extern int bgp_delete(struct bgp *);
2178
2179 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
2180 vrf_id_t old_vrf_id, bool create);
2181
2182 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
2183 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
2184
2185 extern void bm_wait_for_fib_set(bool set);
2186 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
2187 extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
2188 extern void bgp_cluster_id_unset(struct bgp *bgp);
2189
2190 extern void bgp_confederation_id_set(struct bgp *bgp, as_t as);
2191 extern void bgp_confederation_id_unset(struct bgp *bgp);
2192 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
2193
2194 extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as);
2195 extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
2196
2197 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
2198 uint32_t connect_retry, uint32_t delayopen);
2199 extern void bgp_timers_unset(struct bgp *);
2200
2201 extern void bgp_default_local_preference_set(struct bgp *bgp,
2202 uint32_t local_pref);
2203 extern void bgp_default_local_preference_unset(struct bgp *bgp);
2204
2205 extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
2206 uint32_t queue_size);
2207 extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
2208
2209 extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
2210 extern void bgp_listen_limit_unset(struct bgp *bgp);
2211
2212 extern bool bgp_update_delay_active(struct bgp *);
2213 extern bool bgp_update_delay_configured(struct bgp *);
2214 extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
2215 extern void peer_as_change(struct peer *, as_t, int);
2216 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
2217 int);
2218 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
2219 extern int peer_delete(struct peer *peer);
2220 extern void peer_notify_unconfig(struct peer *peer);
2221 extern int peer_group_delete(struct peer_group *);
2222 extern int peer_group_remote_as_delete(struct peer_group *);
2223 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
2224 extern void peer_group_notify_unconfig(struct peer_group *group);
2225
2226 extern int peer_activate(struct peer *, afi_t, safi_t);
2227 extern int peer_deactivate(struct peer *, afi_t, safi_t);
2228
2229 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
2230 struct peer_group *, as_t *);
2231
2232 extern int peer_flag_set(struct peer *peer, uint64_t flag);
2233 extern int peer_flag_unset(struct peer *peer, uint64_t flag);
2234 extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
2235
2236 extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
2237 uint64_t flag);
2238 extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
2239 uint64_t flag);
2240 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
2241 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
2242 uint64_t flag);
2243 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
2244 enum peer_change_type type);
2245
2246 extern int peer_ebgp_multihop_set(struct peer *, int);
2247 extern int peer_ebgp_multihop_unset(struct peer *);
2248 extern int is_ebgp_multihop_configured(struct peer *peer);
2249
2250 extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
2251 extern int peer_role_unset(struct peer *peer);
2252
2253 extern void peer_description_set(struct peer *, const char *);
2254 extern void peer_description_unset(struct peer *);
2255
2256 extern int peer_update_source_if_set(struct peer *, const char *);
2257 extern void peer_update_source_addr_set(struct peer *peer,
2258 const union sockunion *su);
2259 extern void peer_update_source_unset(struct peer *peer);
2260
2261 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
2262 const char *rmap,
2263 struct route_map *route_map);
2264 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
2265 extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
2266 uint16_t interval, uint16_t probes);
2267 extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
2268
2269 extern void peer_port_set(struct peer *, uint16_t);
2270 extern void peer_port_unset(struct peer *);
2271
2272 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
2273 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
2274
2275 extern int peer_timers_set(struct peer *, uint32_t keepalive,
2276 uint32_t holdtime);
2277 extern int peer_timers_unset(struct peer *);
2278
2279 extern int peer_timers_connect_set(struct peer *, uint32_t);
2280 extern int peer_timers_connect_unset(struct peer *);
2281
2282 extern int peer_advertise_interval_set(struct peer *, uint32_t);
2283 extern int peer_advertise_interval_unset(struct peer *);
2284
2285 extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
2286 extern int peer_timers_delayopen_unset(struct peer *peer);
2287
2288 extern void peer_interface_set(struct peer *, const char *);
2289 extern void peer_interface_unset(struct peer *);
2290
2291 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
2292 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
2293
2294 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
2295 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
2296
2297 extern int peer_local_as_set(struct peer *, as_t, bool no_prepend,
2298 bool replace_as);
2299 extern int peer_local_as_unset(struct peer *);
2300
2301 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
2302 const char *);
2303 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
2304
2305 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
2306 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
2307
2308 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
2309 const char *name, struct route_map *route_map);
2310 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
2311
2312 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2313 const char *name,
2314 struct route_map *route_map);
2315
2316 extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
2317 const char *advertise_name,
2318 struct route_map *advertise_map,
2319 const char *condition_name,
2320 struct route_map *condition_map,
2321 bool condition);
2322
2323 extern int peer_password_set(struct peer *, const char *);
2324 extern int peer_password_unset(struct peer *);
2325
2326 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2327
2328 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2329 const char *advertise_name,
2330 struct route_map *advertise_map,
2331 const char *condition_name,
2332 struct route_map *condition_map,
2333 bool condition);
2334
2335 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2336 uint8_t, int, uint16_t, bool force);
2337 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2338
2339 extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
2340 safi_t safi);
2341 extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
2342 safi_t safi, uint32_t max);
2343 extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
2344 safi_t safi);
2345
2346 extern int peer_clear(struct peer *, struct listnode **);
2347 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2348
2349 extern int peer_ttl_security_hops_set(struct peer *, int);
2350 extern int peer_ttl_security_hops_unset(struct peer *);
2351
2352 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2353 extern void peer_tx_shutdown_message_unset(struct peer *);
2354
2355 extern void bgp_route_map_update_timer(struct thread *thread);
2356 extern const char *bgp_get_name_by_role(uint8_t role);
2357
2358 extern void bgp_route_map_terminate(void);
2359
2360 extern int peer_cmp(struct peer *p1, struct peer *p2);
2361
2362 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2363 afi_t *afi, safi_t *safi);
2364 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2365 iana_afi_t *pkt_afi,
2366 iana_safi_t *pkt_safi);
2367
2368 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2369 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2370 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2371
2372 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2373 extern void bgp_shutdown_disable(struct bgp *bgp);
2374
2375 extern void bgp_close(void);
2376 extern void bgp_free(struct bgp *);
2377 void bgp_gr_apply_running_config(void);
2378
2379 /* BGP GR */
2380 int bgp_global_gr_init(struct bgp *bgp);
2381 int bgp_peer_gr_init(struct peer *peer);
2382
2383
2384 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2385 do { \
2386 struct peer *peer_loop; \
2387 bool gr_router_detected = false; \
2388 struct listnode *node = {0}; \
2389 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2390 if (CHECK_FLAG(peer_loop->flags, \
2391 PEER_FLAG_GRACEFUL_RESTART)) \
2392 gr_router_detected = true; \
2393 } \
2394 if (gr_router_detected \
2395 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2396 bgp_zebra_send_capabilities(_bgp, false); \
2397 } else if (!gr_router_detected \
2398 && _bgp->present_zebra_gr_state \
2399 == ZEBRA_GR_ENABLE) { \
2400 bgp_zebra_send_capabilities(_bgp, true); \
2401 } \
2402 } while (0)
2403
2404 static inline struct bgp *bgp_lock(struct bgp *bgp)
2405 {
2406 bgp->lock++;
2407 return bgp;
2408 }
2409
2410 static inline void bgp_unlock(struct bgp *bgp)
2411 {
2412 assert(bgp->lock > 0);
2413 if (--bgp->lock == 0)
2414 bgp_free(bgp);
2415 }
2416
2417 static inline int afindex(afi_t afi, safi_t safi)
2418 {
2419 switch (afi) {
2420 case AFI_IP:
2421 switch (safi) {
2422 case SAFI_UNICAST:
2423 return BGP_AF_IPV4_UNICAST;
2424 case SAFI_MULTICAST:
2425 return BGP_AF_IPV4_MULTICAST;
2426 case SAFI_LABELED_UNICAST:
2427 return BGP_AF_IPV4_LBL_UNICAST;
2428 case SAFI_MPLS_VPN:
2429 return BGP_AF_IPV4_VPN;
2430 case SAFI_ENCAP:
2431 return BGP_AF_IPV4_ENCAP;
2432 case SAFI_FLOWSPEC:
2433 return BGP_AF_IPV4_FLOWSPEC;
2434 case SAFI_EVPN:
2435 case SAFI_UNSPEC:
2436 case SAFI_MAX:
2437 return BGP_AF_MAX;
2438 }
2439 break;
2440 case AFI_IP6:
2441 switch (safi) {
2442 case SAFI_UNICAST:
2443 return BGP_AF_IPV6_UNICAST;
2444 case SAFI_MULTICAST:
2445 return BGP_AF_IPV6_MULTICAST;
2446 case SAFI_LABELED_UNICAST:
2447 return BGP_AF_IPV6_LBL_UNICAST;
2448 case SAFI_MPLS_VPN:
2449 return BGP_AF_IPV6_VPN;
2450 case SAFI_ENCAP:
2451 return BGP_AF_IPV6_ENCAP;
2452 case SAFI_FLOWSPEC:
2453 return BGP_AF_IPV6_FLOWSPEC;
2454 case SAFI_EVPN:
2455 case SAFI_UNSPEC:
2456 case SAFI_MAX:
2457 return BGP_AF_MAX;
2458 }
2459 break;
2460 case AFI_L2VPN:
2461 switch (safi) {
2462 case SAFI_EVPN:
2463 return BGP_AF_L2VPN_EVPN;
2464 case SAFI_UNICAST:
2465 case SAFI_MULTICAST:
2466 case SAFI_LABELED_UNICAST:
2467 case SAFI_MPLS_VPN:
2468 case SAFI_ENCAP:
2469 case SAFI_FLOWSPEC:
2470 case SAFI_UNSPEC:
2471 case SAFI_MAX:
2472 return BGP_AF_MAX;
2473 }
2474 break;
2475 case AFI_UNSPEC:
2476 case AFI_MAX:
2477 return BGP_AF_MAX;
2478 }
2479
2480 assert(!"Reached end of function we should never hit");
2481 }
2482
2483 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2484 static inline int peer_group_active(struct peer *peer)
2485 {
2486 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2487 return 1;
2488 return 0;
2489 }
2490
2491 /* If peer is negotiated at least one address family return 1. */
2492 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2493 {
2494 if (peer->afc_nego[afi][SAFI_UNICAST]
2495 || peer->afc_nego[afi][SAFI_MULTICAST]
2496 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2497 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2498 || peer->afc_nego[afi][SAFI_ENCAP]
2499 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2500 || peer->afc_nego[afi][SAFI_EVPN])
2501 return 1;
2502 return 0;
2503 }
2504
2505 /* If at least one address family activated for group, return 1. */
2506 static inline int peer_group_af_configured(struct peer_group *group)
2507 {
2508 struct peer *peer = group->conf;
2509
2510 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2511 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2512 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2513 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2514 || peer->afc[AFI_IP6][SAFI_UNICAST]
2515 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2516 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2517 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2518 || peer->afc[AFI_IP6][SAFI_ENCAP]
2519 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2520 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2521 return 1;
2522 return 0;
2523 }
2524
2525 static inline char *timestamp_string(time_t ts)
2526 {
2527 time_t tbuf;
2528 tbuf = time(NULL) - (monotime(NULL) - ts);
2529 return ctime(&tbuf);
2530 }
2531
2532 static inline bool peer_established(struct peer *peer)
2533 {
2534 return peer->status == Established;
2535 }
2536
2537 static inline bool peer_dynamic_neighbor(struct peer *peer)
2538 {
2539 return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
2540 }
2541
2542 static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
2543 {
2544 return (peer_dynamic_neighbor(peer) &&
2545 !CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
2546 }
2547
2548 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2549 {
2550 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2551 }
2552
2553 /* Lookup VRF for BGP instance based on its type. */
2554 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2555 {
2556 struct vrf *vrf;
2557
2558 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2559 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2560 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2561 vrf = vrf_lookup_by_name(bgp->name);
2562 else
2563 vrf = NULL;
2564
2565 return vrf;
2566 }
2567
2568 static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
2569 {
2570 struct vrf *vrf;
2571 struct interface *ifp;
2572 uint32_t count = 0;
2573
2574 /* if there is one interface in the vrf which is up then it is deemed
2575 * active
2576 */
2577 vrf = bgp_vrf_lookup_by_instance_type(bgp);
2578 if (vrf == NULL)
2579 return 0;
2580 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
2581 if (strcmp(ifp->name, bgp->name) == 0)
2582 continue;
2583 if (!active || if_is_up(ifp))
2584 count++;
2585 }
2586 return count;
2587 }
2588
2589 /* Link BGP instance to VRF. */
2590 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2591 {
2592 bgp->vrf_id = vrf->vrf_id;
2593 if (vrf->info != (void *)bgp)
2594 vrf->info = (void *)bgp_lock(bgp);
2595 }
2596
2597 /* Unlink BGP instance from VRF. */
2598 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2599 {
2600 if (vrf->info == (void *)bgp) {
2601 vrf->info = NULL;
2602 bgp_unlock(bgp);
2603 }
2604 bgp->vrf_id = VRF_UNKNOWN;
2605 }
2606
2607 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2608 {
2609 /* True if either set for this instance or globally */
2610 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2611 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2612 }
2613
2614 /* For benefit of rfapi */
2615 extern struct peer *peer_new(struct bgp *bgp);
2616
2617 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2618 const char *ip_str, bool use_json);
2619 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2620 const char *name,
2621 enum bgp_instance_type inst_type);
2622
2623 /* Hooks */
2624 DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
2625 (bgp, ifp));
2626 DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
2627 DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
2628 DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
2629 DECLARE_HOOK(bgp_snmp_update_stats,
2630 (struct bgp_node *rn, struct bgp_path_info *pi, bool added),
2631 (rn, pi, added));
2632 DECLARE_HOOK(bgp_rpki_prefix_status,
2633 (struct peer * peer, struct attr *attr,
2634 const struct prefix *prefix),
2635 (peer, attr, prefix));
2636
2637 void peer_nsf_stop(struct peer *peer);
2638
2639 void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
2640 void peer_tcp_mss_unset(struct peer *peer);
2641
2642 extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
2643 safi_t safi);
2644 extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
2645 int outbound);
2646 extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
2647 size_t size);
2648 extern bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
2649 size_t size);
2650 #ifdef _FRR_ATTRIBUTE_PRINTFRR
2651 /* clang-format off */
2652 #pragma FRR printfrr_ext "%pBP" (struct peer *)
2653 /* clang-format on */
2654 #endif
2655
2656 #endif /* _QUAGGA_BGPD_H */
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