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Merge pull request #13060 from opensourcerouting/feature/allow_peering_with_127.0.0.1
[mirror_frr.git] / bgpd / bgpd.h
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* BGP message definition header.
3 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
4 */
5
6 #ifndef _QUAGGA_BGPD_H
7 #define _QUAGGA_BGPD_H
8
9 #include "qobj.h"
10 #include <pthread.h>
11
12 #include "hook.h"
13 #include "frr_pthread.h"
14 #include "lib/json.h"
15 #include "vrf.h"
16 #include "vty.h"
17 #include "srv6.h"
18 #include "iana_afi.h"
19 #include "asn.h"
20
21 /* For union sockunion. */
22 #include "queue.h"
23 #include "sockunion.h"
24 #include "routemap.h"
25 #include "linklist.h"
26 #include "defaults.h"
27 #include "bgp_memory.h"
28 #include "bitfield.h"
29 #include "vxlan.h"
30 #include "bgp_labelpool.h"
31 #include "bgp_addpath_types.h"
32 #include "bgp_nexthop.h"
33 #include "bgp_io.h"
34
35 #include "lib/bfd.h"
36
37 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
38 #define BGP_PEER_MAX_HASH_SIZE 16384
39
40 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
41 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
42
43 struct update_subgroup;
44 struct bpacket;
45 struct bgp_pbr_config;
46
47 /*
48 * Allow the neighbor XXXX remote-as to take internal or external
49 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
50 * behavior
51 * in the system.
52 */
53 enum { AS_UNSPECIFIED = 0,
54 AS_SPECIFIED,
55 AS_INTERNAL,
56 AS_EXTERNAL,
57 };
58
59 /* Zebra Gracaful Restart states */
60 enum zebra_gr_mode {
61 ZEBRA_GR_DISABLE = 0,
62 ZEBRA_GR_ENABLE
63 };
64
65 /* Typedef BGP specific types. */
66 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
67 typedef uint16_t bgp_size_t;
68
69 enum bgp_af_index {
70 BGP_AF_START,
71 BGP_AF_IPV4_UNICAST = BGP_AF_START,
72 BGP_AF_IPV4_MULTICAST,
73 BGP_AF_IPV4_VPN,
74 BGP_AF_IPV6_UNICAST,
75 BGP_AF_IPV6_MULTICAST,
76 BGP_AF_IPV6_VPN,
77 BGP_AF_IPV4_ENCAP,
78 BGP_AF_IPV6_ENCAP,
79 BGP_AF_L2VPN_EVPN,
80 BGP_AF_IPV4_LBL_UNICAST,
81 BGP_AF_IPV6_LBL_UNICAST,
82 BGP_AF_IPV4_FLOWSPEC,
83 BGP_AF_IPV6_FLOWSPEC,
84 BGP_AF_MAX
85 };
86
87 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
88
89 #define FOREACH_SAFI(safi) \
90 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
91
92 extern struct frr_pthread *bgp_pth_io;
93 extern struct frr_pthread *bgp_pth_ka;
94
95 /* BGP master for system wide configurations and variables. */
96 struct bgp_master {
97 /* BGP instance list. */
98 struct list *bgp;
99
100 /* BGP thread master. */
101 struct event_loop *master;
102
103 /* Listening sockets */
104 struct list *listen_sockets;
105
106 /* BGP port number. */
107 uint16_t port;
108
109 /* Listener addresses */
110 struct list *addresses;
111
112 /* The Mac table */
113 struct hash *self_mac_hash;
114
115 /* BGP start time. */
116 time_t start_time;
117
118 /* Various BGP global configuration. */
119 uint8_t options;
120
121 #define BGP_OPT_NO_FIB (1 << 0)
122 #define BGP_OPT_NO_LISTEN (1 << 1)
123 #define BGP_OPT_NO_ZEBRA (1 << 2)
124
125 uint64_t updgrp_idspace;
126 uint64_t subgrp_idspace;
127
128 /* timer to dampen route map changes */
129 struct event *t_rmap_update; /* Handle route map updates */
130 uint32_t rmap_update_timer; /* Route map update timer */
131 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
132
133 /* Id space for automatic RD derivation for an EVI/VRF */
134 bitfield_t rd_idspace;
135
136 /* dynamic mpls label allocation pool */
137 struct labelpool labelpool;
138
139 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
140 struct bgp* bgp_evpn;
141
142 /* How big should we set the socket buffer size */
143 uint32_t socket_buffer;
144
145 /* Should we do wait for fib install globally? */
146 bool wait_for_fib;
147
148 /* EVPN multihoming */
149 struct bgp_evpn_mh_info *mh_info;
150
151 /* global update-delay timer values */
152 uint16_t v_update_delay;
153 uint16_t v_establish_wait;
154
155 uint32_t flags;
156 #define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
157 #define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)
158
159 bool terminating; /* global flag that sigint terminate seen */
160
161 /* DSCP value for TCP sessions */
162 uint8_t tcp_dscp;
163
164 #define BM_DEFAULT_Q_LIMIT 10000
165 uint32_t inq_limit;
166 uint32_t outq_limit;
167
168 QOBJ_FIELDS;
169 };
170 DECLARE_QOBJ_TYPE(bgp_master);
171
172 /* BGP route-map structure. */
173 struct bgp_rmap {
174 char *name;
175 struct route_map *map;
176 };
177
178 struct bgp_redist {
179 unsigned short instance;
180
181 /* BGP redistribute metric configuration. */
182 uint8_t redist_metric_flag;
183 uint32_t redist_metric;
184
185 /* BGP redistribute route-map. */
186 struct bgp_rmap rmap;
187 };
188
189 enum vpn_policy_direction {
190 BGP_VPN_POLICY_DIR_FROMVPN = 0,
191 BGP_VPN_POLICY_DIR_TOVPN = 1,
192 BGP_VPN_POLICY_DIR_MAX = 2
193 };
194
195 struct vpn_policy {
196 struct bgp *bgp; /* parent */
197 afi_t afi;
198 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
199 struct ecommunity *import_redirect_rtlist;
200 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
201 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
202
203 /* should be mpls_label_t? */
204 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
205 uint32_t tovpn_zebra_vrf_label_last_sent;
206 char *tovpn_rd_pretty;
207 struct prefix_rd tovpn_rd;
208 struct prefix tovpn_nexthop; /* unset => set to 0 */
209 uint32_t flags;
210 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
211 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
212 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
213 #define BGP_VPN_POLICY_TOVPN_SID_AUTO (1 << 3)
214
215 /*
216 * If we are importing another vrf into us keep a list of
217 * vrf names that are being imported into us.
218 */
219 struct list *import_vrf;
220
221 /*
222 * if we are being exported to another vrf keep a list of
223 * vrf names that we are being exported to.
224 */
225 struct list *export_vrf;
226
227 /*
228 * Segment-Routing SRv6 Mode
229 */
230 uint32_t tovpn_sid_index; /* unset => set to 0 */
231 struct in6_addr *tovpn_sid;
232 struct srv6_locator_chunk *tovpn_sid_locator;
233 uint32_t tovpn_sid_transpose_label;
234 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
235 };
236
237 /*
238 * Type of 'struct bgp'.
239 * - Default: The default instance
240 * - VRF: A specific (non-default) VRF
241 * - View: An instance used for route exchange
242 * The "default" instance is treated separately to simplify the code. Note
243 * that if deployed in a Multi-VRF environment, it may not exist.
244 */
245 enum bgp_instance_type {
246 BGP_INSTANCE_TYPE_DEFAULT,
247 BGP_INSTANCE_TYPE_VRF,
248 BGP_INSTANCE_TYPE_VIEW
249 };
250
251 #define BGP_SEND_EOR(bgp, afi, safi) \
252 (!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
253 && ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
254 || (bgp->gr_info[afi][safi].eor_required \
255 == bgp->gr_info[afi][safi].eor_received)))
256
257 /* BGP GR Global ds */
258
259 #define BGP_GLOBAL_GR_MODE 4
260 #define BGP_GLOBAL_GR_EVENT_CMD 4
261
262 /* Graceful restart selection deferral timer info */
263 struct graceful_restart_info {
264 /* Count of EOR message expected */
265 uint32_t eor_required;
266 /* Count of EOR received */
267 uint32_t eor_received;
268 /* Deferral Timer */
269 struct event *t_select_deferral;
270 /* Routes Deferred */
271 uint32_t gr_deferred;
272 /* Best route select */
273 struct event *t_route_select;
274 /* AFI, SAFI enabled */
275 bool af_enabled[AFI_MAX][SAFI_MAX];
276 /* Route update completed */
277 bool route_sync[AFI_MAX][SAFI_MAX];
278 };
279
280 enum global_mode {
281 GLOBAL_HELPER = 0, /* This is the default mode */
282 GLOBAL_GR,
283 GLOBAL_DISABLE,
284 GLOBAL_INVALID
285 };
286
287 enum global_gr_command {
288 GLOBAL_GR_CMD = 0,
289 NO_GLOBAL_GR_CMD,
290 GLOBAL_DISABLE_CMD,
291 NO_GLOBAL_DISABLE_CMD
292 };
293
294 #define BGP_GR_SUCCESS 0
295 #define BGP_GR_FAILURE 1
296
297 /* Handling of BGP link bandwidth (LB) on receiver - whether and how to
298 * do weighted ECMP. Note: This applies after multipath computation.
299 */
300 enum bgp_link_bw_handling {
301 /* Do ECMP if some paths don't have LB - default */
302 BGP_LINK_BW_ECMP,
303 /* Completely ignore LB, just do regular ECMP */
304 BGP_LINK_BW_IGNORE_BW,
305 /* Skip paths without LB, do wECMP on others */
306 BGP_LINK_BW_SKIP_MISSING,
307 /* Do wECMP with default weight for paths not having LB */
308 BGP_LINK_BW_DEFWT_4_MISSING
309 };
310
311 RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
312 RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
313
314 struct bgp_snmp_stats {
315 /* SNMP variables for mplsL3Vpn*/
316 time_t creation_time;
317 time_t modify_time;
318 bool active;
319 uint32_t routes_added;
320 uint32_t routes_deleted;
321 };
322
323 struct bgp_srv6_function {
324 struct in6_addr sid;
325 char locator_name[SRV6_LOCNAME_SIZE];
326 };
327
328 struct as_confed {
329 as_t as;
330 char *as_pretty;
331 };
332
333 /* BGP instance structure. */
334 struct bgp {
335 /* AS number of this BGP instance. */
336 as_t as;
337 char *as_pretty;
338
339 /* Name of this BGP instance. */
340 char *name;
341 char *name_pretty; /* printable "VRF|VIEW name|default" */
342
343 /* Type of instance and VRF id. */
344 enum bgp_instance_type inst_type;
345 vrf_id_t vrf_id;
346
347 /* Reference count to allow peer_delete to finish after bgp_delete */
348 int lock;
349
350 /* Self peer. */
351 struct peer *peer_self;
352
353 /* BGP peer. */
354 struct list *peer;
355 struct hash *peerhash;
356
357 /* BGP peer group. */
358 struct list *group;
359
360 /* The maximum number of BGP dynamic neighbors that can be created */
361 int dynamic_neighbors_limit;
362
363 /* The current number of BGP dynamic neighbors */
364 int dynamic_neighbors_count;
365
366 struct hash *update_groups[BGP_AF_MAX];
367
368 /*
369 * Global statistics for update groups.
370 */
371 struct {
372 uint32_t join_events;
373 uint32_t prune_events;
374 uint32_t merge_events;
375 uint32_t split_events;
376 uint32_t updgrp_switch_events;
377 uint32_t peer_refreshes_combined;
378 uint32_t adj_count;
379 uint32_t merge_checks_triggered;
380
381 uint32_t updgrps_created;
382 uint32_t updgrps_deleted;
383 uint32_t subgrps_created;
384 uint32_t subgrps_deleted;
385 } update_group_stats;
386
387 struct bgp_snmp_stats *snmp_stats;
388
389 /* BGP configuration. */
390 uint16_t config;
391 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
392 #define BGP_CONFIG_CONFEDERATION (1 << 1)
393 #define BGP_CONFIG_ASNOTATION (1 << 2)
394
395 /* BGP router identifier. */
396 struct in_addr router_id;
397 struct in_addr router_id_static;
398 struct in_addr router_id_zebra;
399
400 /* BGP route reflector cluster ID. */
401 struct in_addr cluster_id;
402
403 /* BGP confederation information. */
404 as_t confed_id;
405 char *confed_id_pretty;
406 struct as_confed *confed_peers;
407 int confed_peers_cnt;
408
409 /* start-up timer on only once at the beginning */
410 struct event *t_startup;
411
412 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
413 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
414 uint32_t maxmed_onstartup_value; /* Max-med value when active on
415 start-up */
416
417 /* non-null when max-med onstartup is on */
418 struct event *t_maxmed_onstartup;
419 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
420
421 bool v_maxmed_admin; /* true/false if max-med administrative is on/off
422 */
423 #define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
424 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
425 */
426 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
427
428 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
429 uint32_t maxmed_value; /* Max-med value when its active */
430
431 /* BGP update delay on startup */
432 struct event *t_update_delay;
433 struct event *t_establish_wait;
434 struct event *t_revalidate[AFI_MAX][SAFI_MAX];
435
436 uint8_t update_delay_over;
437 uint8_t main_zebra_update_hold;
438 uint8_t main_peers_update_hold;
439 uint16_t v_update_delay;
440 uint16_t v_establish_wait;
441 char update_delay_begin_time[64];
442 char update_delay_end_time[64];
443 char update_delay_zebra_resume_time[64];
444 char update_delay_peers_resume_time[64];
445 uint32_t established;
446 uint32_t restarted_peers;
447 uint32_t implicit_eors;
448 uint32_t explicit_eors;
449 #define BGP_UPDATE_DELAY_DEF 0
450 #define BGP_UPDATE_DELAY_MIN 0
451 #define BGP_UPDATE_DELAY_MAX 3600
452
453 /* Reference bandwidth for BGP link-bandwidth. Used when
454 * the LB value has to be computed based on some other
455 * factor (e.g., number of multipaths for the prefix)
456 * Value is in Mbps
457 */
458 uint32_t lb_ref_bw;
459 #define BGP_LINK_BW_REF_BW 1
460
461 /* BGP flags. */
462 uint64_t flags;
463 #define BGP_FLAG_ALWAYS_COMPARE_MED (1ULL << 0)
464 #define BGP_FLAG_DETERMINISTIC_MED (1ULL << 1)
465 #define BGP_FLAG_MED_MISSING_AS_WORST (1ULL << 2)
466 #define BGP_FLAG_MED_CONFED (1ULL << 3)
467 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1ULL << 4)
468 #define BGP_FLAG_COMPARE_ROUTER_ID (1ULL << 5)
469 #define BGP_FLAG_ASPATH_IGNORE (1ULL << 6)
470 #define BGP_FLAG_IMPORT_CHECK (1ULL << 7)
471 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1ULL << 8)
472 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1ULL << 9)
473
474 /* This flag is set when we have full BGP Graceful-Restart mode enable */
475 #define BGP_FLAG_GRACEFUL_RESTART (1ULL << 10)
476
477 #define BGP_FLAG_ASPATH_CONFED (1ULL << 11)
478 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1ULL << 12)
479 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1ULL << 13)
480 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1ULL << 14)
481 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1ULL << 15)
482 #define BGP_FLAG_FORCE_STATIC_PROCESS (1ULL << 16)
483 #define BGP_FLAG_SHOW_HOSTNAME (1ULL << 17)
484 #define BGP_FLAG_GR_PRESERVE_FWD (1ULL << 18)
485 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1ULL << 19)
486 #define BGP_FLAG_DELETE_IN_PROGRESS (1ULL << 20)
487 #define BGP_FLAG_SELECT_DEFER_DISABLE (1ULL << 21)
488 #define BGP_FLAG_GR_DISABLE_EOR (1ULL << 22)
489 #define BGP_FLAG_EBGP_REQUIRES_POLICY (1ULL << 23)
490 #define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1ULL << 24)
491
492 /* This flag is set if the instance is in administrative shutdown */
493 #define BGP_FLAG_SHUTDOWN (1ULL << 25)
494 #define BGP_FLAG_SUPPRESS_FIB_PENDING (1ULL << 26)
495 #define BGP_FLAG_SUPPRESS_DUPLICATES (1ULL << 27)
496 #define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1ULL << 29)
497 /* Indicate Graceful Restart support for BGP NOTIFICATION messages */
498 #define BGP_FLAG_GRACEFUL_NOTIFICATION (1ULL << 30)
499 /* Send Hard Reset CEASE Notification for 'Administrative Reset' */
500 #define BGP_FLAG_HARD_ADMIN_RESET (1ULL << 31)
501 /* Evaluate the AIGP attribute during the best path selection process */
502 #define BGP_FLAG_COMPARE_AIGP (1ULL << 32)
503
504 /* BGP default address-families.
505 * New peers inherit enabled afi/safis from bgp instance.
506 */
507 uint16_t default_af[AFI_MAX][SAFI_MAX];
508
509 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
510 [BGP_GLOBAL_GR_EVENT_CMD];
511 enum global_mode global_gr_present_state;
512
513 /* This variable stores the current Graceful Restart state of Zebra
514 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
515 */
516 enum zebra_gr_mode present_zebra_gr_state;
517
518 /* BGP Per AF flags */
519 uint16_t af_flags[AFI_MAX][SAFI_MAX];
520 #define BGP_CONFIG_DAMPENING (1 << 0)
521 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
522 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
523 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
524 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
525 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
526 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
527 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
528 /* import/export between address families */
529 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
530 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
531 /* vrf-route leaking flags */
532 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
533 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
534 /* vpnvx retain flag */
535 #define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
536
537 /* BGP per AF peer count */
538 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
539
540 /* Tree for next-hop lookup cache. */
541 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
542
543 /* Tree for import-check */
544 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
545
546 struct bgp_table *connected_table[AFI_MAX];
547
548 struct hash *address_hash;
549
550 /* DB for all local tunnel-ips - used mainly for martian checks
551 Currently it only has all VxLan tunnel IPs*/
552 struct hash *tip_hash;
553
554 /* Static route configuration. */
555 struct bgp_table *route[AFI_MAX][SAFI_MAX];
556
557 /* Aggregate address configuration. */
558 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
559
560 /* BGP routing information base. */
561 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
562
563 /* BGP table route-map. */
564 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
565
566 /* BGP redistribute configuration. */
567 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
568
569 /* Allocate MPLS labels */
570 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
571
572 /* Allocate hash entries to store policy routing information
573 * The hash are used to host pbr rules somewhere.
574 * Actually, pbr will only be used by flowspec
575 * those hash elements will have relationship together as
576 * illustrated in below diagram:
577 *
578 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
579 * <----- pbr_match j <--- pbr_match_entry 1..m
580 * <----- pbr_rule k
581 *
582 * - here in BGP structure, the list of match and actions will
583 * stand for the list of ipset sets, and table_ids in the kernel
584 * - the arrow above between pbr_match and pbr_action indicate
585 * that a backpointer permits match to find the action
586 * - the arrow betwen match_entry and match is a hash list
587 * contained in match, that lists the whole set of entries
588 */
589 struct hash *pbr_match_hash;
590 struct hash *pbr_rule_hash;
591 struct hash *pbr_action_hash;
592
593 /* timer to re-evaluate neighbor default-originate route-maps */
594 struct event *t_rmap_def_originate_eval;
595 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
596
597 /* BGP distance configuration. */
598 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
599 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
600 uint8_t distance_local[AFI_MAX][SAFI_MAX];
601
602 /* BGP default local-preference. */
603 uint32_t default_local_pref;
604
605 /* BGP default subgroup pkt queue max */
606 uint32_t default_subgroup_pkt_queue_max;
607
608 /* BGP default timer. */
609 uint32_t default_holdtime;
610 uint32_t default_keepalive;
611 uint32_t default_connect_retry;
612 uint32_t default_delayopen;
613
614 /* BGP minimum holdtime. */
615 uint16_t default_min_holdtime;
616
617 /* BGP graceful restart */
618 uint32_t restart_time;
619 uint32_t stalepath_time;
620 uint32_t select_defer_time;
621 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
622 uint32_t rib_stale_time;
623
624 /* BGP Long-lived Graceful Restart */
625 uint32_t llgr_stale_time;
626
627 #define BGP_ROUTE_SELECT_DELAY 1
628 #define BGP_MAX_BEST_ROUTE_SELECT 10000
629 /* Maximum-paths configuration */
630 struct bgp_maxpaths_cfg {
631 uint16_t maxpaths_ebgp;
632 uint16_t maxpaths_ibgp;
633 bool same_clusterlen;
634 } maxpaths[AFI_MAX][SAFI_MAX];
635
636 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
637 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
638
639 /* Automatic coalesce adjust on/off */
640 bool heuristic_coalesce;
641 /* Actual coalesce time */
642 uint32_t coalesce_time;
643
644 /* Auto-shutdown new peers */
645 bool autoshutdown;
646
647 struct bgp_addpath_bgp_data tx_addpath;
648
649 #ifdef ENABLE_BGP_VNC
650 struct rfapi_cfg *rfapi_cfg;
651 struct rfapi *rfapi;
652 #endif
653
654 /* EVPN related information */
655
656 /* EVI hash table */
657 struct hash *vnihash;
658
659 /*
660 * VNI hash table based on SVI ifindex as its key.
661 * We use SVI ifindex as key to lookup a VNI table for gateway IP
662 * overlay index recursive lookup.
663 * For this purpose, a hashtable is added which optimizes this lookup.
664 */
665 struct hash *vni_svi_hash;
666
667 /* EVPN enable - advertise gateway macip routes */
668 int advertise_gw_macip;
669
670 /* EVPN enable - advertise local VNIs and their MACs etc. */
671 int advertise_all_vni;
672
673 /* draft-ietf-idr-deprecate-as-set-confed-set
674 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
675 */
676 bool reject_as_sets;
677
678 struct bgp_evpn_info *evpn_info;
679
680 /* EVPN - use RFC 8365 to auto-derive RT */
681 int advertise_autort_rfc8365;
682
683 /*
684 * Flooding mechanism for BUM packets for VxLAN-EVPN.
685 */
686 enum vxlan_flood_control vxlan_flood_ctrl;
687
688 /* Hash table of Import RTs to EVIs */
689 struct hash *import_rt_hash;
690
691 /* Hash table of VRF import RTs to VRFs */
692 struct hash *vrf_import_rt_hash;
693
694 /* L3-VNI corresponding to this vrf */
695 vni_t l3vni;
696
697 /* router-mac to be used in mac-ip routes for this vrf */
698 struct ethaddr rmac;
699
700 /* originator ip - to be used as NH for type-5 routes */
701 struct in_addr originator_ip;
702
703 /* SVI associated with the L3-VNI corresponding to this vrf */
704 ifindex_t l3vni_svi_ifindex;
705
706 /* RB tree of ES-VRFs */
707 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
708
709 /* Hash table of EVPN nexthops maintained per-tenant-VRF */
710 struct hash *evpn_nh_table;
711
712 /*
713 * Flag resolve_overlay_index is used for recursive resolution
714 * procedures for EVPN type-5 route's gateway IP overlay index.
715 * When this flag is set, we build remote-ip-hash for
716 * all L2VNIs and resolve overlay index nexthops using this hash.
717 * Overlay index nexthops remain unresolved if this flag is not set.
718 */
719 bool resolve_overlay_index;
720
721 /* vrf flags */
722 uint32_t vrf_flags;
723 #define BGP_VRF_AUTO (1 << 0)
724 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
725 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
726 #define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
727 #define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
728 #define BGP_VRF_RD_CFGD (1 << 5)
729 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
730 /* per-VRF toVPN SID */
731 #define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
732
733 /* unique ID for auto derivation of RD for this vrf */
734 uint16_t vrf_rd_id;
735
736 /* Automatically derived RD for this VRF */
737 struct prefix_rd vrf_prd_auto;
738
739 /* RD for this VRF */
740 struct prefix_rd vrf_prd;
741 char *vrf_prd_pretty;
742
743 /* import rt list for the vrf instance */
744 struct list *vrf_import_rtl;
745
746 /* export rt list for the vrf instance */
747 struct list *vrf_export_rtl;
748
749 /* list of corresponding l2vnis (struct bgpevpn) */
750 struct list *l2vnis;
751
752 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
753 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
754
755 struct vpn_policy vpn_policy[AFI_MAX];
756
757 struct bgp_pbr_config *bgp_pbr_cfg;
758
759 /* Count of peers in established state */
760 uint32_t established_peers;
761
762 /* Weighted ECMP related config. */
763 enum bgp_link_bw_handling lb_handling;
764
765 /* Process Queue for handling routes */
766 struct work_queue *process_queue;
767
768 bool fast_convergence;
769
770 /* BGP Conditional advertisement */
771 uint32_t condition_check_period;
772 uint32_t condition_filter_count;
773 struct event *t_condition_check;
774
775 /* BGP VPN SRv6 backend */
776 bool srv6_enabled;
777 char srv6_locator_name[SRV6_LOCNAME_SIZE];
778 struct list *srv6_locator_chunks;
779 struct list *srv6_functions;
780 uint32_t tovpn_sid_index; /* unset => set to 0 */
781 struct in6_addr *tovpn_sid;
782 struct srv6_locator_chunk *tovpn_sid_locator;
783 uint32_t tovpn_sid_transpose_label;
784 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
785
786 /* TCP keepalive parameters for BGP connection */
787 uint16_t tcp_keepalive_idle;
788 uint16_t tcp_keepalive_intvl;
789 uint16_t tcp_keepalive_probes;
790
791 struct timeval ebgprequirespolicywarning;
792 #define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
793
794 bool allow_martian;
795
796 enum asnotation_mode asnotation;
797
798 QOBJ_FIELDS;
799 };
800 DECLARE_QOBJ_TYPE(bgp);
801
802 struct bgp_interface {
803 #define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
804 uint32_t flags;
805 };
806
807 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
808 DECLARE_HOOK(bgp_inst_config_write,
809 (struct bgp *bgp, struct vty *vty),
810 (bgp, vty));
811 DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
812
813 /* Thread callback information */
814 struct afi_safi_info {
815 afi_t afi;
816 safi_t safi;
817 struct bgp *bgp;
818 };
819
820 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
821
822 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
823 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
824 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
825 && bgp->vrf_id != VRF_UNKNOWN))
826
827 #define BGP_SELECT_DEFER_DISABLE(bgp) \
828 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
829
830 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
831 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
832 || bm->wait_for_fib)
833
834 /* BGP peer-group support. */
835 struct peer_group {
836 /* Name of the peer-group. */
837 char *name;
838
839 /* Pointer to BGP. */
840 struct bgp *bgp;
841
842 /* Peer-group client list. */
843 struct list *peer;
844
845 /** Dynamic neighbor listening ranges */
846 struct list *listen_range[AFI_MAX];
847
848 /* Peer-group config */
849 struct peer *conf;
850 };
851
852 /* BGP Notify message format. */
853 struct bgp_notify {
854 uint8_t code;
855 uint8_t subcode;
856 char *data;
857 bgp_size_t length;
858 uint8_t *raw_data;
859 bool hard_reset;
860 };
861
862 /* Next hop self address. */
863 struct bgp_nexthop {
864 struct interface *ifp;
865 struct in_addr v4;
866 struct in6_addr v6_global;
867 struct in6_addr v6_local;
868 };
869
870 /* BGP addpath values */
871 #define BGP_ADDPATH_RX 1
872 #define BGP_ADDPATH_TX 2
873 #define BGP_ADDPATH_ID_LEN 4
874
875 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
876
877 /* Route map direction */
878 #define RMAP_IN 0
879 #define RMAP_OUT 1
880 #define RMAP_MAX 2
881
882 #define BGP_DEFAULT_TTL 1
883 #define BGP_GTSM_HOPS_DISABLED 0
884 #define BGP_GTSM_HOPS_CONNECTED 1
885
886 /* Advertise map */
887 #define CONDITION_NON_EXIST false
888 #define CONDITION_EXIST true
889
890 enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
891
892 #include "filter.h"
893
894 /* BGP filter structure. */
895 struct bgp_filter {
896 /* Distribute-list. */
897 struct {
898 char *name;
899 struct access_list *alist;
900 } dlist[FILTER_MAX];
901
902 /* Prefix-list. */
903 struct {
904 char *name;
905 struct prefix_list *plist;
906 } plist[FILTER_MAX];
907
908 /* Filter-list. */
909 struct {
910 char *name;
911 struct as_list *aslist;
912 } aslist[FILTER_MAX];
913
914 /* Route-map. */
915 struct {
916 char *name;
917 struct route_map *map;
918 } map[RMAP_MAX];
919
920 /* Unsuppress-map. */
921 struct {
922 char *name;
923 struct route_map *map;
924 } usmap;
925
926 /* Advertise-map */
927 struct {
928 char *aname;
929 struct route_map *amap;
930
931 bool condition;
932
933 char *cname;
934 struct route_map *cmap;
935
936 enum update_type update_type;
937 } advmap;
938 };
939
940 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
941 a peer who's AS is part of our Confederation. */
942 enum bgp_peer_sort {
943 BGP_PEER_UNSPECIFIED,
944 BGP_PEER_IBGP,
945 BGP_PEER_EBGP,
946 BGP_PEER_INTERNAL,
947 BGP_PEER_CONFED,
948 };
949
950 /* BGP message header and packet size. */
951 #define BGP_MARKER_SIZE 16
952 #define BGP_HEADER_SIZE 19
953 #define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
954 #define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
955 #define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
956 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
957
958 /*
959 * Trigger delay for bgp_announce_route().
960 */
961 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
962 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
963
964 struct peer_af {
965 /* back pointer to the peer */
966 struct peer *peer;
967
968 /* which subgroup the peer_af belongs to */
969 struct update_subgroup *subgroup;
970
971 /* for being part of an update subgroup's peer list */
972 LIST_ENTRY(peer_af) subgrp_train;
973
974 /* for being part of a packet's peer list */
975 LIST_ENTRY(peer_af) pkt_train;
976
977 struct bpacket *next_pkt_to_send;
978
979 /*
980 * Trigger timer for bgp_announce_route().
981 */
982 struct event *t_announce_route;
983
984 afi_t afi;
985 safi_t safi;
986 int afid;
987 };
988 /* BGP GR per peer ds */
989
990 #define BGP_PEER_GR_MODE 5
991 #define BGP_PEER_GR_EVENT_CMD 6
992
993 enum peer_mode {
994 PEER_HELPER = 0,
995 PEER_GR,
996 PEER_DISABLE,
997 PEER_INVALID,
998 PEER_GLOBAL_INHERIT /* This is the default mode */
999
1000 };
1001
1002 enum peer_gr_command {
1003 PEER_GR_CMD = 0,
1004 NO_PEER_GR_CMD,
1005 PEER_DISABLE_CMD,
1006 NO_PEER_DISABLE_CMD,
1007 PEER_HELPER_CMD,
1008 NO_PEER_HELPER_CMD
1009 };
1010
1011 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
1012
1013 struct bgp_peer_gr {
1014 enum peer_mode next_state;
1015 bgp_peer_gr_action_ptr action_fun;
1016 };
1017
1018 /*
1019 * BGP FSM event codes, per RFC 4271 ss. 8.1
1020 */
1021 enum bgp_fsm_rfc_codes {
1022 BGP_FSM_ManualStart = 1,
1023 BGP_FSM_ManualStop = 2,
1024 BGP_FSM_AutomaticStart = 3,
1025 BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
1026 BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
1027 BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
1028 BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
1029 7,
1030 BGP_FSM_AutomaticStop = 8,
1031 BGP_FSM_ConnectRetryTimer_Expires = 9,
1032 BGP_FSM_HoldTimer_Expires = 10,
1033 BGP_FSM_KeepaliveTimer_Expires = 11,
1034 BGP_FSM_DelayOpenTimer_Expires = 12,
1035 BGP_FSM_IdleHoldTimer_Expires = 13,
1036 BGP_FSM_TcpConnection_Valid = 14,
1037 BGP_FSM_Tcp_CR_Invalid = 15,
1038 BGP_FSM_Tcp_CR_Acked = 16,
1039 BGP_FSM_TcpConnectionConfirmed = 17,
1040 BGP_FSM_TcpConnectionFails = 18,
1041 BGP_FSM_BGPOpen = 19,
1042 BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
1043 BGP_FSM_BGPHeaderErr = 21,
1044 BGP_FSM_BGPOpenMsgErr = 22,
1045 BGP_FSM_OpenCollisionDump = 23,
1046 BGP_FSM_NotifMsgVerErr = 24,
1047 BGP_FSM_NotifMsg = 25,
1048 BGP_FSM_KeepAliveMsg = 26,
1049 BGP_FSM_UpdateMsg = 27,
1050 BGP_FSM_UpdateMsgErr = 28
1051 };
1052
1053 /*
1054 * BGP finite state machine events
1055 *
1056 * Note: these do not correspond to RFC-defined event codes. Those are
1057 * defined elsewhere.
1058 */
1059 enum bgp_fsm_events {
1060 BGP_Start = 1,
1061 BGP_Stop,
1062 TCP_connection_open,
1063 TCP_connection_open_w_delay,
1064 TCP_connection_closed,
1065 TCP_connection_open_failed,
1066 TCP_fatal_error,
1067 ConnectRetry_timer_expired,
1068 Hold_Timer_expired,
1069 KeepAlive_timer_expired,
1070 DelayOpen_timer_expired,
1071 Receive_OPEN_message,
1072 Receive_KEEPALIVE_message,
1073 Receive_UPDATE_message,
1074 Receive_NOTIFICATION_message,
1075 Clearing_Completed,
1076 BGP_EVENTS_MAX,
1077 };
1078
1079 /* BGP finite state machine status. */
1080 enum bgp_fsm_status {
1081 Idle = 1,
1082 Connect,
1083 Active,
1084 OpenSent,
1085 OpenConfirm,
1086 Established,
1087 Clearing,
1088 Deleted,
1089 BGP_STATUS_MAX,
1090 };
1091
1092 #define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
1093
1094 struct llgr_info {
1095 uint32_t stale_time;
1096 uint8_t flags;
1097 };
1098
1099 /* BGP neighbor structure. */
1100 struct peer {
1101 /* BGP structure. */
1102 struct bgp *bgp;
1103
1104 /* reference count, primarily to allow bgp_process'ing of route_node's
1105 * to be done after a struct peer is deleted.
1106 *
1107 * named 'lock' for hysterical reasons within Quagga.
1108 */
1109 int lock;
1110
1111 /* BGP peer group. */
1112 struct peer_group *group;
1113 uint64_t version[AFI_MAX][SAFI_MAX];
1114
1115 /* BGP peer_af structures, per configured AF on this peer */
1116 struct peer_af *peer_af_array[BGP_AF_MAX];
1117
1118 /* Peer's remote AS number. */
1119 int as_type;
1120 as_t as;
1121 /* for vty as format */
1122 char *as_pretty;
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 /* for vty as format */
1132 char *change_local_as_pretty;
1133
1134 /* Remote router ID. */
1135 struct in_addr remote_id;
1136
1137 /* Local router ID. */
1138 struct in_addr local_id;
1139
1140 /* Packet receive and send buffer. */
1141 pthread_mutex_t io_mtx; // guards ibuf, obuf
1142 struct stream_fifo *ibuf; // packets waiting to be processed
1143 struct stream_fifo *obuf; // packets waiting to be written
1144
1145 /* used as a block to deposit raw wire data to */
1146 uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
1147 * BGP_READ_PACKET_MAX];
1148 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
1149 struct stream *obuf_work; // WiP buffer used to construct packets
1150
1151 struct stream *curr; // the current packet being parsed
1152
1153 /* We use a separate stream to encode MP_REACH_NLRI for efficient
1154 * NLRI packing. peer->obuf_work stores all the other attributes. The
1155 * actual packet is then constructed by concatenating the two.
1156 */
1157 struct stream *scratch;
1158
1159 /* the doppelganger peer structure, due to dual TCP conn setup */
1160 struct peer *doppelganger;
1161
1162 /* Status of the peer. */
1163 enum bgp_fsm_status status;
1164 enum bgp_fsm_status ostatus;
1165
1166 /* FSM events, stored for debug purposes.
1167 * Note: uchar used for reduced memory usage.
1168 */
1169 enum bgp_fsm_events cur_event;
1170 enum bgp_fsm_events last_event;
1171 enum bgp_fsm_events last_major_event;
1172
1173 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1174 uint16_t table_dump_index;
1175
1176 /* Peer information */
1177 int fd; /* File descriptor */
1178 int ttl; /* TTL of TCP connection to the peer. */
1179 int rtt; /* Estimated round-trip-time from TCP_INFO */
1180 int rtt_expected; /* Expected round-trip-time for a peer */
1181 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1182 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1183 int gtsm_hops; /* minimum hopcount to peer */
1184 char *desc; /* Description of the peer. */
1185 unsigned short port; /* Destination port for peer */
1186 char *host; /* Printable address of the peer. */
1187 union sockunion su; /* Sockunion address of the peer. */
1188 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1189 time_t uptime; /* Last Up/Down time */
1190 time_t readtime; /* Last read time */
1191 time_t resettime; /* Last reset time */
1192
1193 char *conf_if; /* neighbor interface config name. */
1194 struct interface *ifp; /* corresponding interface */
1195 char *ifname; /* bind interface name. */
1196 char *update_if;
1197 union sockunion *update_source;
1198
1199 union sockunion *su_local; /* Sockunion of local address. */
1200 union sockunion *su_remote; /* Sockunion of remote address. */
1201 int shared_network; /* Is this peer shared same network. */
1202 struct bgp_nexthop nexthop; /* Nexthop */
1203
1204 /* Roles in bgp session */
1205 uint8_t local_role;
1206 uint8_t remote_role;
1207 #define ROLE_PROVIDER 0
1208 #define ROLE_RS_SERVER 1
1209 #define ROLE_RS_CLIENT 2
1210 #define ROLE_CUSTOMER 3
1211 #define ROLE_PEER 4
1212 #define ROLE_UNDEFINED 255
1213
1214 #define ROLE_NAME_MAX_LEN 20
1215
1216 /* Peer address family configuration. */
1217 uint8_t afc[AFI_MAX][SAFI_MAX];
1218 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1219 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1220 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1221
1222 /* Capability flags (reset in bgp_stop) */
1223 uint32_t cap;
1224 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1225 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1226 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1227 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1228 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1229 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1230 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1231 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1232 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1233 /* sent graceful-restart restart (R) bit */
1234 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
1235 /* received graceful-restart restart (R) bit */
1236 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
1237 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1238 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1239 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1240 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1241 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1242 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1243 #define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
1244 #define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
1245 #define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
1246 #define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
1247 #define PEER_CAP_LLGR_ADV (1U << 21)
1248 #define PEER_CAP_LLGR_RCV (1U << 22)
1249 /* sent graceful-restart notification (N) bit */
1250 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
1251 /* received graceful-restart notification (N) bit */
1252 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
1253 #define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
1254 #define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
1255 #define PEER_CAP_SOFT_VERSION_ADV (1U << 27)
1256 #define PEER_CAP_SOFT_VERSION_RCV (1U << 28)
1257
1258 /* Capability flags (reset in bgp_stop) */
1259 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1260 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1261 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1262 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1263 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1264 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1265 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1266 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1267 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1268 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1269 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1270 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1271 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1272 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1273 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1274 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1275 #define PEER_CAP_LLGR_AF_ADV (1U << 15)
1276 #define PEER_CAP_LLGR_AF_RCV (1U << 16)
1277
1278 /* Global configuration flags. */
1279 /*
1280 * Parallel array to flags that indicates whether each flag originates
1281 * from a peer-group or if it is config that is specific to this
1282 * individual peer. If a flag is set independent of the peer-group, the
1283 * same bit should be set here. If this peer is a peer-group, this
1284 * memory region should be all zeros.
1285 *
1286 * The assumption is that the default state for all flags is unset,
1287 * so if a flag is unset, the corresponding override flag is unset too.
1288 * However if a flag is set, the corresponding override flag is set.
1289 */
1290 uint64_t flags_override;
1291 /*
1292 * Parallel array to flags that indicates whether the default behavior
1293 * of *flags_override* should be inverted. If a flag is unset and the
1294 * corresponding invert flag is set, the corresponding override flag
1295 * would be set. However if a flag is set and the corresponding invert
1296 * flag is unset, the corresponding override flag would be unset.
1297 *
1298 * This can be used for attributes like *send-community*, which are
1299 * implicitely enabled and have to be disabled explicitely, compared to
1300 * 'normal' attributes like *next-hop-self* which are implicitely set.
1301 *
1302 * All operations dealing with flags should apply the following boolean
1303 * logic to keep the internal flag system in a sane state:
1304 *
1305 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1306 * value=0 invert=1 Unset flag unconditionally
1307 * value=1 invert=0 Set flag unconditionally
1308 * value=1 invert=1 Inherit flag if member, otherwise set flag
1309 *
1310 * Contrary to the implementation of *flags_override*, the flag
1311 * inversion state can be set either on the peer OR the peer *and* the
1312 * peer-group. This was done on purpose, as the inversion state of a
1313 * flag can be determined on either the peer or the peer-group.
1314 *
1315 * Example: Enabling the cisco configuration mode inverts all flags
1316 * related to *send-community* unconditionally for both peer-groups and
1317 * peers.
1318 *
1319 * This behavior is different for interface peers though, which enable
1320 * the *extended-nexthop* flag by default, which regular peers do not.
1321 * As the peer-group can contain both regular and interface peers, the
1322 * flag inversion state must be set on the peer only.
1323 *
1324 * When a peer inherits the configuration from a peer-group and the
1325 * inversion state of the flag differs between peer and peer-group, the
1326 * newly set value must equal to the inverted state of the peer-group.
1327 */
1328 uint64_t flags_invert;
1329 /*
1330 * Effective array for storing the peer/peer-group flags. In case of a
1331 * peer-group, the peer-specific overrides (see flags_override and
1332 * flags_invert) must be respected.
1333 * When changing the structure of flags/af_flags, do not forget to
1334 * change flags_invert/flags_override too.
1335 */
1336 uint64_t flags;
1337 #define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
1338 #define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
1339 #define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
1340 #define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
1341 #define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
1342 #define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
1343 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
1344 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
1345 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
1346 #define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
1347 #define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
1348 #define PEER_FLAG_LONESOUL (1ULL << 11)
1349 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
1350 #define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
1351 #define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
1352 #define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
1353 #define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
1354 #define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
1355 #define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
1356 #define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
1357 #define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
1358 #define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
1359 #define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
1360
1361 /* BGP-GR Peer related flags */
1362 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
1363 #define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
1364 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
1365 #define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
1366 #define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
1367 #define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
1368 /* Disable IEEE floating-point link bandwidth encoding in
1369 * extended communities.
1370 */
1371 #define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
1372 /* force the extended format for Optional Parameters in OPEN message */
1373 #define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
1374
1375 /* BGP Open Policy flags.
1376 * Enforce using roles on both sides:
1377 * `local-role ROLE strict-mode` configured.
1378 */
1379 #define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
1380 /* `local-role` configured */
1381 #define PEER_FLAG_ROLE (1ULL << 32)
1382 #define PEER_FLAG_PORT (1ULL << 33)
1383 #define PEER_FLAG_AIGP (1ULL << 34)
1384 #define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
1385 #define PEER_FLAG_CAPABILITY_SOFT_VERSION (1ULL << 36)
1386
1387 /*
1388 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1389 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1390 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1391 */
1392
1393 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1394 enum peer_mode peer_gr_present_state;
1395 /* Non stop forwarding afi-safi count for BGP gr feature*/
1396 uint8_t nsf_af_count;
1397
1398 uint8_t peer_gr_new_status_flag;
1399 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1400 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1401 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1402
1403 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1404 char *tx_shutdown_message;
1405
1406 /* NSF mode (graceful restart) */
1407 uint8_t nsf[AFI_MAX][SAFI_MAX];
1408 /* EOR Send time */
1409 time_t eor_stime[AFI_MAX][SAFI_MAX];
1410 /* Last update packet sent time */
1411 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1412
1413 /* Peer Per AF flags */
1414 /*
1415 * Please consult the comments for *flags_override*, *flags_invert* and
1416 * *flags* to understand what these three arrays do. The address-family
1417 * specific attributes are being treated the exact same way as global
1418 * peer attributes.
1419 */
1420 uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
1421 uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
1422 uint64_t af_flags[AFI_MAX][SAFI_MAX];
1423 #define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
1424 #define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
1425 #define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
1426 #define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
1427 #define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
1428 #define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
1429 #define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
1430 #define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
1431 #define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
1432 #define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
1433 #define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
1434 #define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
1435 #define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
1436 #define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
1437 #define PEER_FLAG_MAX_PREFIX (1ULL << 14)
1438 #define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
1439 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
1440 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
1441 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
1442 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
1443 #define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
1444 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
1445 #define PEER_FLAG_WEIGHT (1ULL << 22)
1446 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 23)
1447 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 24)
1448 #define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 25)
1449 #define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 26)
1450 #define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 27)
1451 #define PEER_FLAG_SOO (1ULL << 28)
1452 #define PEER_FLAG_ACCEPT_OWN (1ULL << 63)
1453
1454 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1455
1456 /* MD5 password */
1457 char *password;
1458
1459 /* default-originate route-map. */
1460 struct {
1461 char *name;
1462 struct route_map *map;
1463 } default_rmap[AFI_MAX][SAFI_MAX];
1464
1465 /* Peer status flags. */
1466 uint16_t sflags;
1467 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1468 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1469 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1470 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1471 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1472 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1473 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1474 /* received extended format encoding for OPEN message */
1475 #define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
1476
1477 /* Peer status af flags (reset in bgp_stop) */
1478 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1479 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1480 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1481 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1482 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1483 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1484 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1485 #define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
1486 #define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
1487 #define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
1488 #define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
1489 #define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
1490 /* LLGR aware peer */
1491 #define PEER_STATUS_LLGR_WAIT (1U << 11)
1492 #define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
1493 #define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
1494
1495 /* Configured timer values. */
1496 _Atomic uint32_t holdtime;
1497 _Atomic uint32_t keepalive;
1498 _Atomic uint32_t connect;
1499 _Atomic uint32_t routeadv;
1500 _Atomic uint32_t delayopen;
1501
1502 /* Timer values. */
1503 _Atomic uint32_t v_start;
1504 _Atomic uint32_t v_connect;
1505 _Atomic uint32_t v_holdtime;
1506 _Atomic uint32_t v_keepalive;
1507 _Atomic uint32_t v_routeadv;
1508 _Atomic uint32_t v_delayopen;
1509 _Atomic uint32_t v_pmax_restart;
1510 _Atomic uint32_t v_gr_restart;
1511
1512 /* Threads. */
1513 struct event *t_read;
1514 struct event *t_write;
1515 struct event *t_start;
1516 struct event *t_connect_check_r;
1517 struct event *t_connect_check_w;
1518 struct event *t_connect;
1519 struct event *t_holdtime;
1520 struct event *t_routeadv;
1521 struct event *t_delayopen;
1522 struct event *t_pmax_restart;
1523 struct event *t_gr_restart;
1524 struct event *t_gr_stale;
1525 struct event *t_llgr_stale[AFI_MAX][SAFI_MAX];
1526 struct event *t_revalidate_all[AFI_MAX][SAFI_MAX];
1527 struct event *t_generate_updgrp_packets;
1528 struct event *t_process_packet;
1529 struct event *t_process_packet_error;
1530 struct event *t_refresh_stalepath;
1531
1532 /* Thread flags. */
1533 _Atomic uint32_t thread_flags;
1534 #define PEER_THREAD_WRITES_ON (1U << 0)
1535 #define PEER_THREAD_READS_ON (1U << 1)
1536 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1537 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1538
1539 /* workqueues */
1540 struct work_queue *clear_node_queue;
1541
1542 #define PEER_TOTAL_RX(peer) \
1543 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1544 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1545 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1546 + atomic_load_explicit(&peer->refresh_in, \
1547 memory_order_relaxed) \
1548 + atomic_load_explicit(&peer->keepalive_in, \
1549 memory_order_relaxed) \
1550 + atomic_load_explicit(&peer->dynamic_cap_in, \
1551 memory_order_relaxed)
1552
1553 #define PEER_TOTAL_TX(peer) \
1554 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1555 + atomic_load_explicit(&peer->update_out, \
1556 memory_order_relaxed) \
1557 + atomic_load_explicit(&peer->notify_out, \
1558 memory_order_relaxed) \
1559 + atomic_load_explicit(&peer->refresh_out, \
1560 memory_order_relaxed) \
1561 + atomic_load_explicit(&peer->keepalive_out, \
1562 memory_order_relaxed) \
1563 + atomic_load_explicit(&peer->dynamic_cap_out, \
1564 memory_order_relaxed)
1565
1566 /* Statistics field */
1567 _Atomic uint32_t open_in; /* Open message input count */
1568 _Atomic uint32_t open_out; /* Open message output count */
1569 _Atomic uint32_t update_in; /* Update message input count */
1570 _Atomic uint32_t update_out; /* Update message ouput count */
1571 _Atomic time_t update_time; /* Update message received time. */
1572 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1573 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1574 _Atomic uint32_t notify_in; /* Notify input count */
1575 _Atomic uint32_t notify_out; /* Notify output count */
1576 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1577 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1578 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1579 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1580
1581 uint32_t stat_pfx_filter;
1582 uint32_t stat_pfx_aspath_loop;
1583 uint32_t stat_pfx_originator_loop;
1584 uint32_t stat_pfx_cluster_loop;
1585 uint32_t stat_pfx_nh_invalid;
1586 uint32_t stat_pfx_dup_withdraw;
1587 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1588
1589 /* BGP state count */
1590 uint32_t established; /* Established */
1591 uint32_t dropped; /* Dropped */
1592
1593 /* Update delay related fields */
1594 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1595 for EOR */
1596
1597 /* Syncronization list and time. */
1598 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1599 time_t synctime;
1600 /* timestamp when the last UPDATE msg was written */
1601 _Atomic time_t last_write;
1602 /* timestamp when the last msg was written */
1603 _Atomic time_t last_update;
1604
1605 /* only updated under io_mtx.
1606 * last_sendq_warn is only for ratelimiting log warning messages.
1607 */
1608 time_t last_sendq_ok, last_sendq_warn;
1609
1610 /* Notify data. */
1611 struct bgp_notify notify;
1612
1613 /* Filter structure. */
1614 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1615
1616 /*
1617 * Parallel array to filter that indicates whether each filter
1618 * originates from a peer-group or if it is config that is specific to
1619 * this individual peer. If a filter is set independent of the
1620 * peer-group the appropriate bit should be set here. If this peer is a
1621 * peer-group, this memory region should be all zeros. The assumption
1622 * is that the default state for all flags is unset. Due to filters
1623 * having a direction (e.g. in/out/...), this array has a third
1624 * dimension for storing the overrides independently per direction.
1625 *
1626 * Notes:
1627 * - if a filter for an individual peer is unset, the corresponding
1628 * override flag is unset and the peer is considered to be back in
1629 * sync with the peer-group.
1630 * - This does *not* contain the filter values, rather it contains
1631 * whether the filter in filter (struct bgp_filter) is peer-specific.
1632 */
1633 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1634 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1635 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1636 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1637 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1638 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1639 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1640
1641 /* ORF Prefix-list */
1642 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1643
1644 /* Text description of last attribute rcvd */
1645 char rcvd_attr_str[BUFSIZ];
1646
1647 /* Track if we printed the attribute in debugs */
1648 int rcvd_attr_printed;
1649
1650 /* Accepted prefix count */
1651 uint32_t pcount[AFI_MAX][SAFI_MAX];
1652
1653 /* Max prefix count. */
1654 uint32_t pmax[AFI_MAX][SAFI_MAX];
1655 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1656 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1657 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1658
1659 /* Send prefix count. */
1660 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1661
1662 /* allowas-in. */
1663 char allowas_in[AFI_MAX][SAFI_MAX];
1664
1665 /* soo */
1666 struct ecommunity *soo[AFI_MAX][SAFI_MAX];
1667
1668 /* weight */
1669 unsigned long weight[AFI_MAX][SAFI_MAX];
1670
1671 /* peer reset cause */
1672 uint8_t last_reset;
1673 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1674 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1675 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1676 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1677 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1678 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1679 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1680 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1681 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1682 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1683 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1684 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1685 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1686 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1687 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1688 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1689 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1690 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1691 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1692 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1693 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1694 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1695 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1696 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1697 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1698 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1699 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1700 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1701 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1702 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1703 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1704 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1705 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1706 #define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
1707 #define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
1708 /*
1709 * Remember to update peer_down_str in bgp_fsm.c when you add
1710 * a new value to the last_reset reason
1711 */
1712
1713 uint16_t last_reset_cause_size;
1714 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1715
1716 /* The kind of route-map Flags.*/
1717 uint16_t rmap_type;
1718 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1719 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1720 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1721 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1722 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1723 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1724 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1725 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1726 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1727
1728 /** Peer overwrite configuration. */
1729 struct bfd_session_config {
1730 /**
1731 * Manual configuration bit.
1732 *
1733 * This flag only makes sense for real peers (and not groups),
1734 * it keeps track if the user explicitly configured BFD for a
1735 * peer.
1736 */
1737 bool manual;
1738 /** Control Plane Independent. */
1739 bool cbit;
1740 /** Detection multiplier. */
1741 uint8_t detection_multiplier;
1742 /** Minimum required RX interval. */
1743 uint32_t min_rx;
1744 /** Minimum required TX interval. */
1745 uint32_t min_tx;
1746 /** Profile name. */
1747 char profile[BFD_PROFILE_NAME_LEN];
1748 /** Peer BFD session */
1749 struct bfd_session_params *session;
1750 } * bfd_config;
1751
1752 /* hostname and domainname advertised by host */
1753 char *hostname;
1754 char *domainname;
1755
1756 /* Sender side AS path loop detection. */
1757 bool as_path_loop_detection;
1758
1759 /* Extended Message Support */
1760 uint16_t max_packet_size;
1761
1762 /* Conditional advertisement */
1763 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1764 bool advmap_table_change;
1765
1766 /* set TCP max segment size */
1767 uint32_t tcp_mss;
1768
1769 /* Long-lived Graceful Restart */
1770 struct llgr_info llgr[AFI_MAX][SAFI_MAX];
1771
1772 bool shut_during_cfg;
1773
1774 #define BGP_ATTR_MAX 255
1775 /* Path attributes discard */
1776 bool discard_attrs[BGP_ATTR_MAX];
1777
1778 /* Path attributes treat-as-withdraw */
1779 bool withdraw_attrs[BGP_ATTR_MAX];
1780
1781 /* BGP Software Version Capability */
1782 #define BGP_MAX_SOFT_VERSION 64
1783 char *soft_version;
1784
1785 QOBJ_FIELDS;
1786 };
1787 DECLARE_QOBJ_TYPE(peer);
1788
1789 /* Inherit peer attribute from peer-group. */
1790 #define PEER_ATTR_INHERIT(peer, group, attr) \
1791 ((peer)->attr = (group)->conf->attr)
1792 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1793 do { \
1794 XFREE(mt, (peer)->attr); \
1795 if ((group)->conf->attr) \
1796 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1797 else \
1798 (peer)->attr = NULL; \
1799 } while (0)
1800 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1801 do { \
1802 if ((peer)->attr) \
1803 sockunion_free((peer)->attr); \
1804 if ((group)->conf->attr) \
1805 (peer)->attr = sockunion_dup((group)->conf->attr); \
1806 else \
1807 (peer)->attr = NULL; \
1808 } while (0)
1809
1810 /* Check if suppress start/restart of sessions to peer. */
1811 #define BGP_PEER_START_SUPPRESSED(P) \
1812 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
1813 CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
1814 CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
1815 (P)->shut_during_cfg)
1816
1817 #define PEER_ROUTE_ADV_DELAY(peer) \
1818 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1819
1820 #define PEER_PASSWORD_MINLEN (1)
1821 #define PEER_PASSWORD_MAXLEN (80)
1822
1823 /* This structure's member directly points incoming packet data
1824 stream. */
1825 struct bgp_nlri {
1826 /* AFI. */
1827 uint16_t afi; /* iana_afi_t */
1828
1829 /* SAFI. */
1830 uint8_t safi; /* iana_safi_t */
1831
1832 /* Pointer to NLRI byte stream. */
1833 uint8_t *nlri;
1834
1835 /* Length of whole NLRI. */
1836 bgp_size_t length;
1837 };
1838
1839 /* BGP versions. */
1840 #define BGP_VERSION_4 4
1841
1842 /* Default BGP port number. */
1843 #define BGP_PORT_DEFAULT 179
1844
1845 /* Extended BGP Administrative Shutdown Communication */
1846 #define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
1847
1848 /* BGP minimum message size. */
1849 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1850 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1851 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1852 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1853 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1854 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1855
1856 /* BGP message types. */
1857 #define BGP_MSG_OPEN 1
1858 #define BGP_MSG_UPDATE 2
1859 #define BGP_MSG_NOTIFY 3
1860 #define BGP_MSG_KEEPALIVE 4
1861 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1862 #define BGP_MSG_CAPABILITY 6
1863 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1864
1865 /* BGP open optional parameter. */
1866 #define BGP_OPEN_OPT_CAP 2
1867
1868 /* BGP4 attribute type codes. */
1869 #define BGP_ATTR_ORIGIN 1
1870 #define BGP_ATTR_AS_PATH 2
1871 #define BGP_ATTR_NEXT_HOP 3
1872 #define BGP_ATTR_MULTI_EXIT_DISC 4
1873 #define BGP_ATTR_LOCAL_PREF 5
1874 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1875 #define BGP_ATTR_AGGREGATOR 7
1876 #define BGP_ATTR_COMMUNITIES 8
1877 #define BGP_ATTR_ORIGINATOR_ID 9
1878 #define BGP_ATTR_CLUSTER_LIST 10
1879 #define BGP_ATTR_MP_REACH_NLRI 14
1880 #define BGP_ATTR_MP_UNREACH_NLRI 15
1881 #define BGP_ATTR_EXT_COMMUNITIES 16
1882 #define BGP_ATTR_AS4_PATH 17
1883 #define BGP_ATTR_AS4_AGGREGATOR 18
1884 #define BGP_ATTR_PMSI_TUNNEL 22
1885 #define BGP_ATTR_ENCAP 23
1886 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1887 #define BGP_ATTR_AIGP 26
1888 #define BGP_ATTR_LARGE_COMMUNITIES 32
1889 #define BGP_ATTR_OTC 35
1890 #define BGP_ATTR_PREFIX_SID 40
1891 #define BGP_ATTR_SRTE_COLOR 51
1892 #ifdef ENABLE_BGP_VNC_ATTR
1893 #define BGP_ATTR_VNC 255
1894 #endif
1895
1896 /* BGP update origin. */
1897 #define BGP_ORIGIN_IGP 0
1898 #define BGP_ORIGIN_EGP 1
1899 #define BGP_ORIGIN_INCOMPLETE 2
1900 #define BGP_ORIGIN_UNSPECIFIED 255
1901
1902 /* BGP notify message codes. */
1903 #define BGP_NOTIFY_HEADER_ERR 1
1904 #define BGP_NOTIFY_OPEN_ERR 2
1905 #define BGP_NOTIFY_UPDATE_ERR 3
1906 #define BGP_NOTIFY_HOLD_ERR 4
1907 #define BGP_NOTIFY_FSM_ERR 5
1908 #define BGP_NOTIFY_CEASE 6
1909 #define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
1910
1911 /* Subcodes for BGP Finite State Machine Error */
1912 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1913 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1914 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1915 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1916
1917 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1918
1919 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1920 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1921 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1922 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1923
1924 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1925 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1926 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1927 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1928 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1929 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1930 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1931 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1932 #define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
1933
1934 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1935 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1936 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1937 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1938 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1939 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1940 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1941 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1942 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1943 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1944 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1945
1946 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1947 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1948 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1949 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1950 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1951 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1952 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1953 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1954 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1955 #define BGP_NOTIFY_CEASE_HARD_RESET 9
1956 #define BGP_NOTIFY_CEASE_BFD_DOWN 10
1957
1958 /* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
1959 #define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
1960
1961 /* BGP route refresh optional subtypes. */
1962 #define BGP_ROUTE_REFRESH_NORMAL 0
1963 #define BGP_ROUTE_REFRESH_BORR 1
1964 #define BGP_ROUTE_REFRESH_EORR 2
1965
1966 /* BGP timers default value. */
1967 #define BGP_INIT_START_TIMER 1
1968 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1969 * version-/profile-specific values. The values here do not matter, they only
1970 * exist to provide a clear layering separation between core and CLI.
1971 */
1972 #define BGP_DEFAULT_HOLDTIME 180
1973 #define BGP_DEFAULT_KEEPALIVE 60
1974 #define BGP_DEFAULT_CONNECT_RETRY 120
1975
1976 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1977 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1978
1979 /* BGP RFC 4271 DelayOpenTime default value */
1980 #define BGP_DEFAULT_DELAYOPEN 120
1981
1982 /* BGP default local preference. */
1983 #define BGP_DEFAULT_LOCAL_PREF 100
1984
1985 /* BGP local-preference to send when 'bgp graceful-shutdown'
1986 * is configured */
1987 #define BGP_GSHUT_LOCAL_PREF 0
1988
1989 /* BGP default subgroup packet queue max . */
1990 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1991
1992 /* BGP graceful restart */
1993 #define BGP_DEFAULT_RESTART_TIME 120
1994 #define BGP_DEFAULT_STALEPATH_TIME 360
1995 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1996 #define BGP_DEFAULT_RIB_STALE_TIME 500
1997 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
1998
1999 /* BGP Long-lived Graceful Restart */
2000 #define BGP_DEFAULT_LLGR_STALE_TIME 0
2001
2002 /* BGP uptime string length. */
2003 #define BGP_UPTIME_LEN 25
2004
2005 /* Default configuration settings for bgpd. */
2006 #define BGP_VTY_PORT 2605
2007 #define BGP_DEFAULT_CONFIG "bgpd.conf"
2008
2009 /* BGP Dynamic Neighbors feature */
2010 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
2011 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
2012 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
2013
2014 /* BGP AIGP */
2015 #define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
2016 #define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
2017 #define BGP_AIGP_TLV_METRIC_LEN 11
2018 #define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
2019 #define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
2020
2021 /* Flag for peer_clear_soft(). */
2022 enum bgp_clear_type {
2023 BGP_CLEAR_SOFT_NONE,
2024 BGP_CLEAR_SOFT_OUT,
2025 BGP_CLEAR_SOFT_IN,
2026 BGP_CLEAR_SOFT_BOTH,
2027 BGP_CLEAR_SOFT_IN_ORF_PREFIX,
2028 BGP_CLEAR_MESSAGE_STATS
2029 };
2030
2031 /* Macros. */
2032 #define BGP_INPUT(P) ((P)->curr)
2033 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
2034 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
2035 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
2036
2037 /* BGP error codes. */
2038 enum bgp_create_error_code {
2039 BGP_SUCCESS = 0,
2040 BGP_CREATED = 1,
2041 BGP_ERR_INVALID_VALUE = -1,
2042 BGP_ERR_INVALID_FLAG = -2,
2043 BGP_ERR_INVALID_AS = -3,
2044 BGP_ERR_PEER_GROUP_MEMBER = -4,
2045 BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
2046 BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
2047 BGP_ERR_PEER_GROUP_MISMATCH = -7,
2048 BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
2049 BGP_ERR_AS_MISMATCH = -9,
2050 BGP_ERR_PEER_FLAG_CONFLICT = -10,
2051 BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
2052 BGP_ERR_PEER_FILTER_CONFLICT = -12,
2053 BGP_ERR_NOT_INTERNAL_PEER = -13,
2054 BGP_ERR_REMOVE_PRIVATE_AS = -14,
2055 BGP_ERR_AF_UNCONFIGURED = -15,
2056 BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
2057 BGP_ERR_INSTANCE_MISMATCH = -17,
2058 BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
2059 BGP_ERR_TCPSIG_FAILED = -20,
2060 BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
2061 BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
2062 BGP_ERR_NO_INTERFACE_CONFIG = -23,
2063 BGP_ERR_AS_OVERRIDE = -25,
2064 BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
2065 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
2066 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
2067 BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
2068 BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
2069 BGP_ERR_PEER_SAFI_CONFLICT = -31,
2070
2071 /* BGP GR ERRORS */
2072 BGP_ERR_GR_INVALID_CMD = -32,
2073 BGP_ERR_GR_OPERATION_FAILED = -33,
2074 BGP_GR_NO_OPERATION = -34,
2075
2076 /*BGP Open Policy ERRORS */
2077 BGP_ERR_INVALID_ROLE_NAME = -35,
2078 BGP_ERR_INVALID_INTERNAL_ROLE = -36
2079 };
2080
2081 /*
2082 * Enumeration of different policy kinds a peer can be configured with.
2083 */
2084 enum bgp_policy_type {
2085 BGP_POLICY_ROUTE_MAP,
2086 BGP_POLICY_FILTER_LIST,
2087 BGP_POLICY_PREFIX_LIST,
2088 BGP_POLICY_DISTRIBUTE_LIST,
2089 };
2090
2091 /* peer_flag_change_type. */
2092 enum peer_change_type {
2093 peer_change_none,
2094 peer_change_reset,
2095 peer_change_reset_in,
2096 peer_change_reset_out,
2097 };
2098
2099 extern struct bgp_master *bm;
2100 extern unsigned int multipath_num;
2101
2102 /* Prototypes. */
2103 extern void bgp_terminate(void);
2104 extern void bgp_reset(void);
2105 extern void bgp_zclient_reset(void);
2106 extern struct bgp *bgp_get_default(void);
2107 extern struct bgp *bgp_lookup(as_t, const char *);
2108 extern struct bgp *bgp_lookup_by_name(const char *);
2109 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
2110 extern struct bgp *bgp_get_evpn(void);
2111 extern void bgp_set_evpn(struct bgp *bgp);
2112 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
2113 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
2114 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
2115 extern void bgp_peer_conf_if_to_su_update(struct peer *);
2116 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
2117 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
2118 extern struct peer_group *peer_group_get(struct bgp *, const char *);
2119 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
2120 union sockunion *,
2121 struct peer_group *);
2122 extern struct prefix *
2123 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
2124 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
2125 struct prefix *,
2126 struct prefix **);
2127 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
2128 union sockunion *);
2129
2130 /*
2131 * Peers are incredibly easy to memory leak
2132 * due to the various ways that they are actually used
2133 * Provide some functionality to debug locks and unlocks
2134 */
2135 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
2136 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
2137 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
2138 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
2139
2140 extern enum bgp_peer_sort peer_sort(struct peer *peer);
2141 extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
2142
2143 extern bool peer_active(struct peer *);
2144 extern bool peer_active_nego(struct peer *);
2145 extern bool peer_afc_received(struct peer *peer);
2146 extern bool peer_afc_advertised(struct peer *peer);
2147 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
2148 extern struct peer *peer_create(union sockunion *su, const char *conf_if,
2149 struct bgp *bgp, as_t local_as, as_t remote_as,
2150 int as_type, struct peer_group *group,
2151 bool config_node, const char *as_str);
2152 extern struct peer *peer_create_accept(struct bgp *);
2153 extern void peer_xfer_config(struct peer *dst, struct peer *src);
2154 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
2155 json_object *json);
2156
2157 extern int bgp_config_write(struct vty *);
2158
2159 extern void bgp_master_init(struct event_loop *master, const int buffer_size,
2160 struct list *addresses);
2161
2162 extern void bgp_init(unsigned short instance);
2163 extern void bgp_pthreads_run(void);
2164 extern void bgp_pthreads_finish(void);
2165 extern void bgp_route_map_init(void);
2166 extern void bgp_session_reset(struct peer *);
2167
2168 extern int bgp_option_set(int);
2169 extern int bgp_option_unset(int);
2170 extern int bgp_option_check(int);
2171
2172 /* set the bgp no-rib option during runtime and remove installed routes */
2173 extern void bgp_option_norib_set_runtime(void);
2174
2175 /* unset the bgp no-rib option during runtime and reset all peers */
2176 extern void bgp_option_norib_unset_runtime(void);
2177
2178 extern int bgp_get(struct bgp **bgp, as_t *as, const char *name,
2179 enum bgp_instance_type kind, const char *as_pretty,
2180 enum asnotation_mode asnotation);
2181 extern void bgp_instance_up(struct bgp *);
2182 extern void bgp_instance_down(struct bgp *);
2183 extern int bgp_delete(struct bgp *);
2184
2185 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
2186 vrf_id_t old_vrf_id, bool create);
2187
2188 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
2189 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
2190
2191 extern void bm_wait_for_fib_set(bool set);
2192 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
2193 extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
2194 extern void bgp_cluster_id_unset(struct bgp *bgp);
2195
2196 extern void bgp_confederation_id_set(struct bgp *bgp, as_t as,
2197 const char *as_str);
2198 extern void bgp_confederation_id_unset(struct bgp *bgp);
2199 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
2200
2201 extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as,
2202 const char *as_str);
2203 extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
2204
2205 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
2206 uint32_t connect_retry, uint32_t delayopen);
2207 extern void bgp_timers_unset(struct bgp *);
2208
2209 extern void bgp_default_local_preference_set(struct bgp *bgp,
2210 uint32_t local_pref);
2211 extern void bgp_default_local_preference_unset(struct bgp *bgp);
2212
2213 extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
2214 uint32_t queue_size);
2215 extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
2216
2217 extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
2218 extern void bgp_listen_limit_unset(struct bgp *bgp);
2219
2220 extern bool bgp_update_delay_active(struct bgp *);
2221 extern bool bgp_update_delay_configured(struct bgp *);
2222 extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
2223 extern void peer_as_change(struct peer *peer, as_t as, int as_type,
2224 const char *as_str);
2225 extern int peer_remote_as(struct bgp *bgp, union sockunion *su,
2226 const char *conf_if, as_t *as, int as_type,
2227 const char *as_str);
2228 extern int peer_group_remote_as(struct bgp *bgp, const char *peer_str, as_t *as,
2229 int as_type, const char *as_str);
2230 extern int peer_delete(struct peer *peer);
2231 extern void peer_notify_unconfig(struct peer *peer);
2232 extern int peer_group_delete(struct peer_group *);
2233 extern int peer_group_remote_as_delete(struct peer_group *);
2234 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
2235 extern void peer_group_notify_unconfig(struct peer_group *group);
2236
2237 extern int peer_activate(struct peer *, afi_t, safi_t);
2238 extern int peer_deactivate(struct peer *, afi_t, safi_t);
2239
2240 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
2241 struct peer_group *, as_t *);
2242
2243 extern int peer_flag_set(struct peer *peer, uint64_t flag);
2244 extern int peer_flag_unset(struct peer *peer, uint64_t flag);
2245 extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
2246
2247 extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
2248 uint64_t flag);
2249 extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
2250 uint64_t flag);
2251 extern bool peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi,
2252 uint64_t flag);
2253 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
2254 uint64_t flag);
2255 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
2256 enum peer_change_type type);
2257
2258 extern int peer_ebgp_multihop_set(struct peer *, int);
2259 extern int peer_ebgp_multihop_unset(struct peer *);
2260 extern int is_ebgp_multihop_configured(struct peer *peer);
2261
2262 extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
2263 extern int peer_role_unset(struct peer *peer);
2264
2265 extern void peer_description_set(struct peer *, const char *);
2266 extern void peer_description_unset(struct peer *);
2267
2268 extern int peer_update_source_if_set(struct peer *, const char *);
2269 extern void peer_update_source_addr_set(struct peer *peer,
2270 const union sockunion *su);
2271 extern void peer_update_source_unset(struct peer *peer);
2272
2273 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
2274 const char *rmap,
2275 struct route_map *route_map);
2276 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
2277 extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
2278 uint16_t interval, uint16_t probes);
2279 extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
2280
2281 extern void peer_port_set(struct peer *, uint16_t);
2282 extern void peer_port_unset(struct peer *);
2283
2284 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
2285 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
2286
2287 extern int peer_timers_set(struct peer *, uint32_t keepalive,
2288 uint32_t holdtime);
2289 extern int peer_timers_unset(struct peer *);
2290
2291 extern int peer_timers_connect_set(struct peer *, uint32_t);
2292 extern int peer_timers_connect_unset(struct peer *);
2293
2294 extern int peer_advertise_interval_set(struct peer *, uint32_t);
2295 extern int peer_advertise_interval_unset(struct peer *);
2296
2297 extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
2298 extern int peer_timers_delayopen_unset(struct peer *peer);
2299
2300 extern void peer_interface_set(struct peer *, const char *);
2301 extern void peer_interface_unset(struct peer *);
2302
2303 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
2304 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
2305
2306 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
2307 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
2308
2309 extern int peer_local_as_set(struct peer *peer, as_t as, bool no_prepend,
2310 bool replace_as, const char *as_str);
2311 extern int peer_local_as_unset(struct peer *);
2312
2313 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
2314 const char *);
2315 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
2316
2317 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
2318 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
2319
2320 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
2321 const char *name, struct route_map *route_map);
2322 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
2323
2324 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2325 const char *name,
2326 struct route_map *route_map);
2327
2328 extern int peer_advertise_map_set(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_password_set(struct peer *, const char *);
2336 extern int peer_password_unset(struct peer *);
2337
2338 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2339
2340 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2341 const char *advertise_name,
2342 struct route_map *advertise_map,
2343 const char *condition_name,
2344 struct route_map *condition_map,
2345 bool condition);
2346
2347 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2348 uint8_t, int, uint16_t, bool force);
2349 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2350
2351 extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
2352 safi_t safi);
2353 extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
2354 safi_t safi, uint32_t max);
2355 extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
2356 safi_t safi);
2357
2358 extern int peer_clear(struct peer *, struct listnode **);
2359 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2360
2361 extern int peer_ttl_security_hops_set(struct peer *, int);
2362 extern int peer_ttl_security_hops_unset(struct peer *);
2363
2364 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2365 extern void peer_tx_shutdown_message_unset(struct peer *);
2366
2367 extern void bgp_route_map_update_timer(struct event *thread);
2368 extern const char *bgp_get_name_by_role(uint8_t role);
2369 extern enum asnotation_mode bgp_get_asnotation(struct bgp *bgp);
2370
2371 extern void bgp_route_map_terminate(void);
2372
2373 extern int peer_cmp(struct peer *p1, struct peer *p2);
2374
2375 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2376 afi_t *afi, safi_t *safi);
2377 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2378 iana_afi_t *pkt_afi,
2379 iana_safi_t *pkt_safi);
2380
2381 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2382 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2383 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2384
2385 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2386 extern void bgp_shutdown_disable(struct bgp *bgp);
2387
2388 extern void bgp_close(void);
2389 extern void bgp_free(struct bgp *);
2390 void bgp_gr_apply_running_config(void);
2391
2392 /* BGP GR */
2393 int bgp_global_gr_init(struct bgp *bgp);
2394 int bgp_peer_gr_init(struct peer *peer);
2395
2396
2397 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2398 do { \
2399 struct peer *peer_loop; \
2400 bool gr_router_detected = false; \
2401 struct listnode *node = {0}; \
2402 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2403 if (CHECK_FLAG(peer_loop->flags, \
2404 PEER_FLAG_GRACEFUL_RESTART)) \
2405 gr_router_detected = true; \
2406 } \
2407 if (gr_router_detected \
2408 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2409 bgp_zebra_send_capabilities(_bgp, false); \
2410 } else if (!gr_router_detected \
2411 && _bgp->present_zebra_gr_state \
2412 == ZEBRA_GR_ENABLE) { \
2413 bgp_zebra_send_capabilities(_bgp, true); \
2414 } \
2415 } while (0)
2416
2417 static inline struct bgp *bgp_lock(struct bgp *bgp)
2418 {
2419 bgp->lock++;
2420 return bgp;
2421 }
2422
2423 static inline void bgp_unlock(struct bgp *bgp)
2424 {
2425 assert(bgp->lock > 0);
2426 if (--bgp->lock == 0)
2427 bgp_free(bgp);
2428 }
2429
2430 static inline int afindex(afi_t afi, safi_t safi)
2431 {
2432 switch (afi) {
2433 case AFI_IP:
2434 switch (safi) {
2435 case SAFI_UNICAST:
2436 return BGP_AF_IPV4_UNICAST;
2437 case SAFI_MULTICAST:
2438 return BGP_AF_IPV4_MULTICAST;
2439 case SAFI_LABELED_UNICAST:
2440 return BGP_AF_IPV4_LBL_UNICAST;
2441 case SAFI_MPLS_VPN:
2442 return BGP_AF_IPV4_VPN;
2443 case SAFI_ENCAP:
2444 return BGP_AF_IPV4_ENCAP;
2445 case SAFI_FLOWSPEC:
2446 return BGP_AF_IPV4_FLOWSPEC;
2447 case SAFI_EVPN:
2448 case SAFI_UNSPEC:
2449 case SAFI_MAX:
2450 return BGP_AF_MAX;
2451 }
2452 break;
2453 case AFI_IP6:
2454 switch (safi) {
2455 case SAFI_UNICAST:
2456 return BGP_AF_IPV6_UNICAST;
2457 case SAFI_MULTICAST:
2458 return BGP_AF_IPV6_MULTICAST;
2459 case SAFI_LABELED_UNICAST:
2460 return BGP_AF_IPV6_LBL_UNICAST;
2461 case SAFI_MPLS_VPN:
2462 return BGP_AF_IPV6_VPN;
2463 case SAFI_ENCAP:
2464 return BGP_AF_IPV6_ENCAP;
2465 case SAFI_FLOWSPEC:
2466 return BGP_AF_IPV6_FLOWSPEC;
2467 case SAFI_EVPN:
2468 case SAFI_UNSPEC:
2469 case SAFI_MAX:
2470 return BGP_AF_MAX;
2471 }
2472 break;
2473 case AFI_L2VPN:
2474 switch (safi) {
2475 case SAFI_EVPN:
2476 return BGP_AF_L2VPN_EVPN;
2477 case SAFI_UNICAST:
2478 case SAFI_MULTICAST:
2479 case SAFI_LABELED_UNICAST:
2480 case SAFI_MPLS_VPN:
2481 case SAFI_ENCAP:
2482 case SAFI_FLOWSPEC:
2483 case SAFI_UNSPEC:
2484 case SAFI_MAX:
2485 return BGP_AF_MAX;
2486 }
2487 break;
2488 case AFI_UNSPEC:
2489 case AFI_MAX:
2490 return BGP_AF_MAX;
2491 }
2492
2493 assert(!"Reached end of function we should never hit");
2494 }
2495
2496 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2497 static inline int peer_group_active(struct peer *peer)
2498 {
2499 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2500 return 1;
2501 return 0;
2502 }
2503
2504 /* If peer is negotiated at least one address family return 1. */
2505 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2506 {
2507 if (peer->afc_nego[afi][SAFI_UNICAST]
2508 || peer->afc_nego[afi][SAFI_MULTICAST]
2509 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2510 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2511 || peer->afc_nego[afi][SAFI_ENCAP]
2512 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2513 || peer->afc_nego[afi][SAFI_EVPN])
2514 return 1;
2515 return 0;
2516 }
2517
2518 /* If at least one address family activated for group, return 1. */
2519 static inline int peer_group_af_configured(struct peer_group *group)
2520 {
2521 struct peer *peer = group->conf;
2522
2523 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2524 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2525 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2526 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2527 || peer->afc[AFI_IP6][SAFI_UNICAST]
2528 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2529 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2530 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2531 || peer->afc[AFI_IP6][SAFI_ENCAP]
2532 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2533 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2534 return 1;
2535 return 0;
2536 }
2537
2538 static inline char *timestamp_string(time_t ts)
2539 {
2540 time_t tbuf;
2541 tbuf = time(NULL) - (monotime(NULL) - ts);
2542 return ctime(&tbuf);
2543 }
2544
2545 static inline bool peer_established(struct peer *peer)
2546 {
2547 return peer->status == Established;
2548 }
2549
2550 static inline bool peer_dynamic_neighbor(struct peer *peer)
2551 {
2552 return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
2553 }
2554
2555 static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
2556 {
2557 return (peer_dynamic_neighbor(peer) &&
2558 !CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
2559 }
2560
2561 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2562 {
2563 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2564 }
2565
2566 /* Lookup VRF for BGP instance based on its type. */
2567 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2568 {
2569 struct vrf *vrf;
2570
2571 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2572 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2573 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2574 vrf = vrf_lookup_by_name(bgp->name);
2575 else
2576 vrf = NULL;
2577
2578 return vrf;
2579 }
2580
2581 static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
2582 {
2583 struct vrf *vrf;
2584 struct interface *ifp;
2585 uint32_t count = 0;
2586
2587 /* if there is one interface in the vrf which is up then it is deemed
2588 * active
2589 */
2590 vrf = bgp_vrf_lookup_by_instance_type(bgp);
2591 if (vrf == NULL)
2592 return 0;
2593 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
2594 if (strcmp(ifp->name, bgp->name) == 0)
2595 continue;
2596 if (!active || if_is_up(ifp))
2597 count++;
2598 }
2599 return count;
2600 }
2601
2602 /* Link BGP instance to VRF. */
2603 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2604 {
2605 bgp->vrf_id = vrf->vrf_id;
2606 if (vrf->info != (void *)bgp)
2607 vrf->info = (void *)bgp_lock(bgp);
2608 }
2609
2610 /* Unlink BGP instance from VRF. */
2611 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2612 {
2613 if (vrf->info == (void *)bgp) {
2614 vrf->info = NULL;
2615 bgp_unlock(bgp);
2616 }
2617 bgp->vrf_id = VRF_UNKNOWN;
2618 }
2619
2620 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2621 {
2622 /* True if either set for this instance or globally */
2623 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2624 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2625 }
2626
2627 /* For benefit of rfapi */
2628 extern struct peer *peer_new(struct bgp *bgp);
2629
2630 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2631 const char *ip_str, bool use_json);
2632 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2633 const char *name,
2634 enum bgp_instance_type inst_type);
2635
2636 /* Hooks */
2637 DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
2638 (bgp, ifp));
2639 DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
2640 DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
2641 DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
2642 DECLARE_HOOK(bgp_snmp_update_stats,
2643 (struct bgp_node *rn, struct bgp_path_info *pi, bool added),
2644 (rn, pi, added));
2645 DECLARE_HOOK(bgp_rpki_prefix_status,
2646 (struct peer * peer, struct attr *attr,
2647 const struct prefix *prefix),
2648 (peer, attr, prefix));
2649
2650 void peer_nsf_stop(struct peer *peer);
2651
2652 void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
2653 void peer_tcp_mss_unset(struct peer *peer);
2654
2655 extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
2656 safi_t safi);
2657 extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
2658 int outbound);
2659 extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
2660 size_t size);
2661 extern bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
2662 size_t size);
2663 #ifdef _FRR_ATTRIBUTE_PRINTFRR
2664 /* clang-format off */
2665 #pragma FRR printfrr_ext "%pBP" (struct peer *)
2666 /* clang-format on */
2667 #endif
2668
2669 #endif /* _QUAGGA_BGPD_H */
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