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Merge pull request #13236 from Orange-OpenSource/ospf-te
[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 /* For BGP-LU, force local prefixes to use explicit-null label */
504 #define BGP_FLAG_LU_EXPLICIT_NULL (1ULL << 33)
505
506 /* BGP default address-families.
507 * New peers inherit enabled afi/safis from bgp instance.
508 */
509 uint16_t default_af[AFI_MAX][SAFI_MAX];
510
511 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
512 [BGP_GLOBAL_GR_EVENT_CMD];
513 enum global_mode global_gr_present_state;
514
515 /* This variable stores the current Graceful Restart state of Zebra
516 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
517 */
518 enum zebra_gr_mode present_zebra_gr_state;
519
520 /* BGP Per AF flags */
521 uint16_t af_flags[AFI_MAX][SAFI_MAX];
522 #define BGP_CONFIG_DAMPENING (1 << 0)
523 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
524 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
525 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
526 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
527 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
528 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
529 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
530 /* import/export between address families */
531 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
532 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
533 /* vrf-route leaking flags */
534 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
535 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
536 /* vpnvx retain flag */
537 #define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
538
539 /* BGP per AF peer count */
540 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
541
542 /* Tree for next-hop lookup cache. */
543 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
544
545 /* Tree for import-check */
546 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
547
548 struct bgp_table *connected_table[AFI_MAX];
549
550 struct hash *address_hash;
551
552 /* DB for all local tunnel-ips - used mainly for martian checks
553 Currently it only has all VxLan tunnel IPs*/
554 struct hash *tip_hash;
555
556 /* Static route configuration. */
557 struct bgp_table *route[AFI_MAX][SAFI_MAX];
558
559 /* Aggregate address configuration. */
560 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
561
562 /* BGP routing information base. */
563 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
564
565 /* BGP table route-map. */
566 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
567
568 /* BGP redistribute configuration. */
569 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
570
571 /* Allocate MPLS labels */
572 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
573
574 /* Allocate hash entries to store policy routing information
575 * The hash are used to host pbr rules somewhere.
576 * Actually, pbr will only be used by flowspec
577 * those hash elements will have relationship together as
578 * illustrated in below diagram:
579 *
580 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
581 * <----- pbr_match j <--- pbr_match_entry 1..m
582 * <----- pbr_rule k
583 *
584 * - here in BGP structure, the list of match and actions will
585 * stand for the list of ipset sets, and table_ids in the kernel
586 * - the arrow above between pbr_match and pbr_action indicate
587 * that a backpointer permits match to find the action
588 * - the arrow betwen match_entry and match is a hash list
589 * contained in match, that lists the whole set of entries
590 */
591 struct hash *pbr_match_hash;
592 struct hash *pbr_rule_hash;
593 struct hash *pbr_action_hash;
594
595 /* timer to re-evaluate neighbor default-originate route-maps */
596 struct event *t_rmap_def_originate_eval;
597 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
598
599 /* BGP distance configuration. */
600 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
601 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
602 uint8_t distance_local[AFI_MAX][SAFI_MAX];
603
604 /* BGP default local-preference. */
605 uint32_t default_local_pref;
606
607 /* BGP default subgroup pkt queue max */
608 uint32_t default_subgroup_pkt_queue_max;
609
610 /* BGP default timer. */
611 uint32_t default_holdtime;
612 uint32_t default_keepalive;
613 uint32_t default_connect_retry;
614 uint32_t default_delayopen;
615
616 /* BGP minimum holdtime. */
617 uint16_t default_min_holdtime;
618
619 /* BGP graceful restart */
620 uint32_t restart_time;
621 uint32_t stalepath_time;
622 uint32_t select_defer_time;
623 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
624 uint32_t rib_stale_time;
625
626 /* BGP Long-lived Graceful Restart */
627 uint32_t llgr_stale_time;
628
629 #define BGP_ROUTE_SELECT_DELAY 1
630 #define BGP_MAX_BEST_ROUTE_SELECT 10000
631 /* Maximum-paths configuration */
632 struct bgp_maxpaths_cfg {
633 uint16_t maxpaths_ebgp;
634 uint16_t maxpaths_ibgp;
635 bool same_clusterlen;
636 } maxpaths[AFI_MAX][SAFI_MAX];
637
638 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
639 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
640
641 /* Automatic coalesce adjust on/off */
642 bool heuristic_coalesce;
643 /* Actual coalesce time */
644 uint32_t coalesce_time;
645
646 /* Auto-shutdown new peers */
647 bool autoshutdown;
648
649 struct bgp_addpath_bgp_data tx_addpath;
650
651 #ifdef ENABLE_BGP_VNC
652 struct rfapi_cfg *rfapi_cfg;
653 struct rfapi *rfapi;
654 #endif
655
656 /* EVPN related information */
657
658 /* EVI hash table */
659 struct hash *vnihash;
660
661 /*
662 * VNI hash table based on SVI ifindex as its key.
663 * We use SVI ifindex as key to lookup a VNI table for gateway IP
664 * overlay index recursive lookup.
665 * For this purpose, a hashtable is added which optimizes this lookup.
666 */
667 struct hash *vni_svi_hash;
668
669 /* EVPN enable - advertise gateway macip routes */
670 int advertise_gw_macip;
671
672 /* EVPN enable - advertise local VNIs and their MACs etc. */
673 int advertise_all_vni;
674
675 /* draft-ietf-idr-deprecate-as-set-confed-set
676 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
677 */
678 bool reject_as_sets;
679
680 struct bgp_evpn_info *evpn_info;
681
682 /* EVPN - use RFC 8365 to auto-derive RT */
683 int advertise_autort_rfc8365;
684
685 /*
686 * Flooding mechanism for BUM packets for VxLAN-EVPN.
687 */
688 enum vxlan_flood_control vxlan_flood_ctrl;
689
690 /* Hash table of Import RTs to EVIs */
691 struct hash *import_rt_hash;
692
693 /* Hash table of VRF import RTs to VRFs */
694 struct hash *vrf_import_rt_hash;
695
696 /* L3-VNI corresponding to this vrf */
697 vni_t l3vni;
698
699 /* router-mac to be used in mac-ip routes for this vrf */
700 struct ethaddr rmac;
701
702 /* originator ip - to be used as NH for type-5 routes */
703 struct in_addr originator_ip;
704
705 /* SVI associated with the L3-VNI corresponding to this vrf */
706 ifindex_t l3vni_svi_ifindex;
707
708 /* RB tree of ES-VRFs */
709 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
710
711 /* Hash table of EVPN nexthops maintained per-tenant-VRF */
712 struct hash *evpn_nh_table;
713
714 /*
715 * Flag resolve_overlay_index is used for recursive resolution
716 * procedures for EVPN type-5 route's gateway IP overlay index.
717 * When this flag is set, we build remote-ip-hash for
718 * all L2VNIs and resolve overlay index nexthops using this hash.
719 * Overlay index nexthops remain unresolved if this flag is not set.
720 */
721 bool resolve_overlay_index;
722
723 /* vrf flags */
724 uint32_t vrf_flags;
725 #define BGP_VRF_AUTO (1 << 0)
726 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
727 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
728 #define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
729 #define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
730 #define BGP_VRF_RD_CFGD (1 << 5)
731 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
732 /* per-VRF toVPN SID */
733 #define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
734
735 /* unique ID for auto derivation of RD for this vrf */
736 uint16_t vrf_rd_id;
737
738 /* Automatically derived RD for this VRF */
739 struct prefix_rd vrf_prd_auto;
740
741 /* RD for this VRF */
742 struct prefix_rd vrf_prd;
743 char *vrf_prd_pretty;
744
745 /* import rt list for the vrf instance */
746 struct list *vrf_import_rtl;
747
748 /* export rt list for the vrf instance */
749 struct list *vrf_export_rtl;
750
751 /* list of corresponding l2vnis (struct bgpevpn) */
752 struct list *l2vnis;
753
754 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
755 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
756
757 struct vpn_policy vpn_policy[AFI_MAX];
758
759 struct bgp_pbr_config *bgp_pbr_cfg;
760
761 /* Count of peers in established state */
762 uint32_t established_peers;
763
764 /* Weighted ECMP related config. */
765 enum bgp_link_bw_handling lb_handling;
766
767 /* Process Queue for handling routes */
768 struct work_queue *process_queue;
769
770 bool fast_convergence;
771
772 /* BGP Conditional advertisement */
773 uint32_t condition_check_period;
774 uint32_t condition_filter_count;
775 struct event *t_condition_check;
776
777 /* BGP VPN SRv6 backend */
778 bool srv6_enabled;
779 char srv6_locator_name[SRV6_LOCNAME_SIZE];
780 struct list *srv6_locator_chunks;
781 struct list *srv6_functions;
782 uint32_t tovpn_sid_index; /* unset => set to 0 */
783 struct in6_addr *tovpn_sid;
784 struct srv6_locator_chunk *tovpn_sid_locator;
785 uint32_t tovpn_sid_transpose_label;
786 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
787
788 /* TCP keepalive parameters for BGP connection */
789 uint16_t tcp_keepalive_idle;
790 uint16_t tcp_keepalive_intvl;
791 uint16_t tcp_keepalive_probes;
792
793 struct timeval ebgprequirespolicywarning;
794 #define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
795
796 bool allow_martian;
797
798 enum asnotation_mode asnotation;
799
800 QOBJ_FIELDS;
801 };
802 DECLARE_QOBJ_TYPE(bgp);
803
804 struct bgp_interface {
805 #define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
806 uint32_t flags;
807 };
808
809 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
810 DECLARE_HOOK(bgp_inst_config_write,
811 (struct bgp *bgp, struct vty *vty),
812 (bgp, vty));
813 DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
814
815 /* Thread callback information */
816 struct afi_safi_info {
817 afi_t afi;
818 safi_t safi;
819 struct bgp *bgp;
820 };
821
822 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
823
824 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
825 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
826 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
827 && bgp->vrf_id != VRF_UNKNOWN))
828
829 #define BGP_SELECT_DEFER_DISABLE(bgp) \
830 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
831
832 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
833 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
834 || bm->wait_for_fib)
835
836 /* BGP peer-group support. */
837 struct peer_group {
838 /* Name of the peer-group. */
839 char *name;
840
841 /* Pointer to BGP. */
842 struct bgp *bgp;
843
844 /* Peer-group client list. */
845 struct list *peer;
846
847 /** Dynamic neighbor listening ranges */
848 struct list *listen_range[AFI_MAX];
849
850 /* Peer-group config */
851 struct peer *conf;
852 };
853
854 /* BGP Notify message format. */
855 struct bgp_notify {
856 uint8_t code;
857 uint8_t subcode;
858 char *data;
859 bgp_size_t length;
860 uint8_t *raw_data;
861 bool hard_reset;
862 };
863
864 /* Next hop self address. */
865 struct bgp_nexthop {
866 struct interface *ifp;
867 struct in_addr v4;
868 struct in6_addr v6_global;
869 struct in6_addr v6_local;
870 };
871
872 /* BGP addpath values */
873 #define BGP_ADDPATH_RX 1
874 #define BGP_ADDPATH_TX 2
875 #define BGP_ADDPATH_ID_LEN 4
876
877 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
878
879 /* Route map direction */
880 #define RMAP_IN 0
881 #define RMAP_OUT 1
882 #define RMAP_MAX 2
883
884 #define BGP_DEFAULT_TTL 1
885 #define BGP_GTSM_HOPS_DISABLED 0
886 #define BGP_GTSM_HOPS_CONNECTED 1
887
888 /* Advertise map */
889 #define CONDITION_NON_EXIST false
890 #define CONDITION_EXIST true
891
892 enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
893
894 #include "filter.h"
895
896 /* BGP filter structure. */
897 struct bgp_filter {
898 /* Distribute-list. */
899 struct {
900 char *name;
901 struct access_list *alist;
902 } dlist[FILTER_MAX];
903
904 /* Prefix-list. */
905 struct {
906 char *name;
907 struct prefix_list *plist;
908 } plist[FILTER_MAX];
909
910 /* Filter-list. */
911 struct {
912 char *name;
913 struct as_list *aslist;
914 } aslist[FILTER_MAX];
915
916 /* Route-map. */
917 struct {
918 char *name;
919 struct route_map *map;
920 } map[RMAP_MAX];
921
922 /* Unsuppress-map. */
923 struct {
924 char *name;
925 struct route_map *map;
926 } usmap;
927
928 /* Advertise-map */
929 struct {
930 char *aname;
931 struct route_map *amap;
932
933 bool condition;
934
935 char *cname;
936 struct route_map *cmap;
937
938 enum update_type update_type;
939 } advmap;
940 };
941
942 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
943 a peer who's AS is part of our Confederation. */
944 enum bgp_peer_sort {
945 BGP_PEER_UNSPECIFIED,
946 BGP_PEER_IBGP,
947 BGP_PEER_EBGP,
948 BGP_PEER_INTERNAL,
949 BGP_PEER_CONFED,
950 };
951
952 /* BGP message header and packet size. */
953 #define BGP_MARKER_SIZE 16
954 #define BGP_HEADER_SIZE 19
955 #define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
956 #define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
957 #define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
958 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
959
960 /*
961 * Trigger delay for bgp_announce_route().
962 */
963 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
964 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
965
966 struct peer_af {
967 /* back pointer to the peer */
968 struct peer *peer;
969
970 /* which subgroup the peer_af belongs to */
971 struct update_subgroup *subgroup;
972
973 /* for being part of an update subgroup's peer list */
974 LIST_ENTRY(peer_af) subgrp_train;
975
976 /* for being part of a packet's peer list */
977 LIST_ENTRY(peer_af) pkt_train;
978
979 struct bpacket *next_pkt_to_send;
980
981 /*
982 * Trigger timer for bgp_announce_route().
983 */
984 struct event *t_announce_route;
985
986 afi_t afi;
987 safi_t safi;
988 int afid;
989 };
990 /* BGP GR per peer ds */
991
992 #define BGP_PEER_GR_MODE 5
993 #define BGP_PEER_GR_EVENT_CMD 6
994
995 enum peer_mode {
996 PEER_HELPER = 0,
997 PEER_GR,
998 PEER_DISABLE,
999 PEER_INVALID,
1000 PEER_GLOBAL_INHERIT /* This is the default mode */
1001
1002 };
1003
1004 enum peer_gr_command {
1005 PEER_GR_CMD = 0,
1006 NO_PEER_GR_CMD,
1007 PEER_DISABLE_CMD,
1008 NO_PEER_DISABLE_CMD,
1009 PEER_HELPER_CMD,
1010 NO_PEER_HELPER_CMD
1011 };
1012
1013 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
1014
1015 struct bgp_peer_gr {
1016 enum peer_mode next_state;
1017 bgp_peer_gr_action_ptr action_fun;
1018 };
1019
1020 /*
1021 * BGP FSM event codes, per RFC 4271 ss. 8.1
1022 */
1023 enum bgp_fsm_rfc_codes {
1024 BGP_FSM_ManualStart = 1,
1025 BGP_FSM_ManualStop = 2,
1026 BGP_FSM_AutomaticStart = 3,
1027 BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
1028 BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
1029 BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
1030 BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
1031 7,
1032 BGP_FSM_AutomaticStop = 8,
1033 BGP_FSM_ConnectRetryTimer_Expires = 9,
1034 BGP_FSM_HoldTimer_Expires = 10,
1035 BGP_FSM_KeepaliveTimer_Expires = 11,
1036 BGP_FSM_DelayOpenTimer_Expires = 12,
1037 BGP_FSM_IdleHoldTimer_Expires = 13,
1038 BGP_FSM_TcpConnection_Valid = 14,
1039 BGP_FSM_Tcp_CR_Invalid = 15,
1040 BGP_FSM_Tcp_CR_Acked = 16,
1041 BGP_FSM_TcpConnectionConfirmed = 17,
1042 BGP_FSM_TcpConnectionFails = 18,
1043 BGP_FSM_BGPOpen = 19,
1044 BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
1045 BGP_FSM_BGPHeaderErr = 21,
1046 BGP_FSM_BGPOpenMsgErr = 22,
1047 BGP_FSM_OpenCollisionDump = 23,
1048 BGP_FSM_NotifMsgVerErr = 24,
1049 BGP_FSM_NotifMsg = 25,
1050 BGP_FSM_KeepAliveMsg = 26,
1051 BGP_FSM_UpdateMsg = 27,
1052 BGP_FSM_UpdateMsgErr = 28
1053 };
1054
1055 /*
1056 * BGP finite state machine events
1057 *
1058 * Note: these do not correspond to RFC-defined event codes. Those are
1059 * defined elsewhere.
1060 */
1061 enum bgp_fsm_events {
1062 BGP_Start = 1,
1063 BGP_Stop,
1064 TCP_connection_open,
1065 TCP_connection_open_w_delay,
1066 TCP_connection_closed,
1067 TCP_connection_open_failed,
1068 TCP_fatal_error,
1069 ConnectRetry_timer_expired,
1070 Hold_Timer_expired,
1071 KeepAlive_timer_expired,
1072 DelayOpen_timer_expired,
1073 Receive_OPEN_message,
1074 Receive_KEEPALIVE_message,
1075 Receive_UPDATE_message,
1076 Receive_NOTIFICATION_message,
1077 Clearing_Completed,
1078 BGP_EVENTS_MAX,
1079 };
1080
1081 /* BGP finite state machine status. */
1082 enum bgp_fsm_status {
1083 Idle = 1,
1084 Connect,
1085 Active,
1086 OpenSent,
1087 OpenConfirm,
1088 Established,
1089 Clearing,
1090 Deleted,
1091 BGP_STATUS_MAX,
1092 };
1093
1094 #define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
1095
1096 struct llgr_info {
1097 uint32_t stale_time;
1098 uint8_t flags;
1099 };
1100
1101 /* BGP neighbor structure. */
1102 struct peer {
1103 /* BGP structure. */
1104 struct bgp *bgp;
1105
1106 /* reference count, primarily to allow bgp_process'ing of route_node's
1107 * to be done after a struct peer is deleted.
1108 *
1109 * named 'lock' for hysterical reasons within Quagga.
1110 */
1111 int lock;
1112
1113 /* BGP peer group. */
1114 struct peer_group *group;
1115 uint64_t version[AFI_MAX][SAFI_MAX];
1116
1117 /* BGP peer_af structures, per configured AF on this peer */
1118 struct peer_af *peer_af_array[BGP_AF_MAX];
1119
1120 /* Peer's remote AS number. */
1121 int as_type;
1122 as_t as;
1123 /* for vty as format */
1124 char *as_pretty;
1125
1126 /* Peer's local AS number. */
1127 as_t local_as;
1128
1129 enum bgp_peer_sort sort;
1130
1131 /* Peer's Change local AS number. */
1132 as_t change_local_as;
1133 /* for vty as format */
1134 char *change_local_as_pretty;
1135
1136 /* Remote router ID. */
1137 struct in_addr remote_id;
1138
1139 /* Local router ID. */
1140 struct in_addr local_id;
1141
1142 /* Packet receive and send buffer. */
1143 pthread_mutex_t io_mtx; // guards ibuf, obuf
1144 struct stream_fifo *ibuf; // packets waiting to be processed
1145 struct stream_fifo *obuf; // packets waiting to be written
1146
1147 /* used as a block to deposit raw wire data to */
1148 uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
1149 * BGP_READ_PACKET_MAX];
1150 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
1151 struct stream *obuf_work; // WiP buffer used to construct packets
1152
1153 struct stream *curr; // the current packet being parsed
1154
1155 /* We use a separate stream to encode MP_REACH_NLRI for efficient
1156 * NLRI packing. peer->obuf_work stores all the other attributes. The
1157 * actual packet is then constructed by concatenating the two.
1158 */
1159 struct stream *scratch;
1160
1161 /* the doppelganger peer structure, due to dual TCP conn setup */
1162 struct peer *doppelganger;
1163
1164 /* Status of the peer. */
1165 enum bgp_fsm_status status;
1166 enum bgp_fsm_status ostatus;
1167
1168 /* FSM events, stored for debug purposes.
1169 * Note: uchar used for reduced memory usage.
1170 */
1171 enum bgp_fsm_events cur_event;
1172 enum bgp_fsm_events last_event;
1173 enum bgp_fsm_events last_major_event;
1174
1175 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1176 uint16_t table_dump_index;
1177
1178 /* Peer information */
1179 int fd; /* File descriptor */
1180 int ttl; /* TTL of TCP connection to the peer. */
1181 int rtt; /* Estimated round-trip-time from TCP_INFO */
1182 int rtt_expected; /* Expected round-trip-time for a peer */
1183 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1184 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1185 int gtsm_hops; /* minimum hopcount to peer */
1186 char *desc; /* Description of the peer. */
1187 unsigned short port; /* Destination port for peer */
1188 char *host; /* Printable address of the peer. */
1189 union sockunion su; /* Sockunion address of the peer. */
1190 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1191 time_t uptime; /* Last Up/Down time */
1192 time_t readtime; /* Last read time */
1193 time_t resettime; /* Last reset time */
1194
1195 char *conf_if; /* neighbor interface config name. */
1196 struct interface *ifp; /* corresponding interface */
1197 char *ifname; /* bind interface name. */
1198 char *update_if;
1199 union sockunion *update_source;
1200
1201 union sockunion *su_local; /* Sockunion of local address. */
1202 union sockunion *su_remote; /* Sockunion of remote address. */
1203 int shared_network; /* Is this peer shared same network. */
1204 struct bgp_nexthop nexthop; /* Nexthop */
1205
1206 /* Roles in bgp session */
1207 uint8_t local_role;
1208 uint8_t remote_role;
1209 #define ROLE_PROVIDER 0
1210 #define ROLE_RS_SERVER 1
1211 #define ROLE_RS_CLIENT 2
1212 #define ROLE_CUSTOMER 3
1213 #define ROLE_PEER 4
1214 #define ROLE_UNDEFINED 255
1215
1216 #define ROLE_NAME_MAX_LEN 20
1217
1218 /* Peer address family configuration. */
1219 uint8_t afc[AFI_MAX][SAFI_MAX];
1220 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1221 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1222 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1223
1224 /* Capability flags (reset in bgp_stop) */
1225 uint32_t cap;
1226 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1227 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1228 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1229 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1230 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1231 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1232 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1233 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1234 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1235 /* sent graceful-restart restart (R) bit */
1236 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
1237 /* received graceful-restart restart (R) bit */
1238 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
1239 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1240 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1241 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1242 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1243 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1244 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1245 #define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
1246 #define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
1247 #define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
1248 #define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
1249 #define PEER_CAP_LLGR_ADV (1U << 21)
1250 #define PEER_CAP_LLGR_RCV (1U << 22)
1251 /* sent graceful-restart notification (N) bit */
1252 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
1253 /* received graceful-restart notification (N) bit */
1254 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
1255 #define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
1256 #define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
1257 #define PEER_CAP_SOFT_VERSION_ADV (1U << 27)
1258 #define PEER_CAP_SOFT_VERSION_RCV (1U << 28)
1259
1260 /* Capability flags (reset in bgp_stop) */
1261 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1262 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1263 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1264 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1265 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1266 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1267 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1268 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1269 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1270 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1271 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1272 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1273 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1274 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1275 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1276 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1277 #define PEER_CAP_LLGR_AF_ADV (1U << 15)
1278 #define PEER_CAP_LLGR_AF_RCV (1U << 16)
1279
1280 /* Global configuration flags. */
1281 /*
1282 * Parallel array to flags that indicates whether each flag originates
1283 * from a peer-group or if it is config that is specific to this
1284 * individual peer. If a flag is set independent of the peer-group, the
1285 * same bit should be set here. If this peer is a peer-group, this
1286 * memory region should be all zeros.
1287 *
1288 * The assumption is that the default state for all flags is unset,
1289 * so if a flag is unset, the corresponding override flag is unset too.
1290 * However if a flag is set, the corresponding override flag is set.
1291 */
1292 uint64_t flags_override;
1293 /*
1294 * Parallel array to flags that indicates whether the default behavior
1295 * of *flags_override* should be inverted. If a flag is unset and the
1296 * corresponding invert flag is set, the corresponding override flag
1297 * would be set. However if a flag is set and the corresponding invert
1298 * flag is unset, the corresponding override flag would be unset.
1299 *
1300 * This can be used for attributes like *send-community*, which are
1301 * implicitely enabled and have to be disabled explicitely, compared to
1302 * 'normal' attributes like *next-hop-self* which are implicitely set.
1303 *
1304 * All operations dealing with flags should apply the following boolean
1305 * logic to keep the internal flag system in a sane state:
1306 *
1307 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1308 * value=0 invert=1 Unset flag unconditionally
1309 * value=1 invert=0 Set flag unconditionally
1310 * value=1 invert=1 Inherit flag if member, otherwise set flag
1311 *
1312 * Contrary to the implementation of *flags_override*, the flag
1313 * inversion state can be set either on the peer OR the peer *and* the
1314 * peer-group. This was done on purpose, as the inversion state of a
1315 * flag can be determined on either the peer or the peer-group.
1316 *
1317 * Example: Enabling the cisco configuration mode inverts all flags
1318 * related to *send-community* unconditionally for both peer-groups and
1319 * peers.
1320 *
1321 * This behavior is different for interface peers though, which enable
1322 * the *extended-nexthop* flag by default, which regular peers do not.
1323 * As the peer-group can contain both regular and interface peers, the
1324 * flag inversion state must be set on the peer only.
1325 *
1326 * When a peer inherits the configuration from a peer-group and the
1327 * inversion state of the flag differs between peer and peer-group, the
1328 * newly set value must equal to the inverted state of the peer-group.
1329 */
1330 uint64_t flags_invert;
1331 /*
1332 * Effective array for storing the peer/peer-group flags. In case of a
1333 * peer-group, the peer-specific overrides (see flags_override and
1334 * flags_invert) must be respected.
1335 * When changing the structure of flags/af_flags, do not forget to
1336 * change flags_invert/flags_override too.
1337 */
1338 uint64_t flags;
1339 #define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
1340 #define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
1341 #define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
1342 #define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
1343 #define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
1344 #define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
1345 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
1346 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
1347 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
1348 #define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
1349 #define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
1350 #define PEER_FLAG_LONESOUL (1ULL << 11)
1351 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
1352 #define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
1353 #define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
1354 #define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
1355 #define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
1356 #define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
1357 #define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
1358 #define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
1359 #define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
1360 #define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
1361 #define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
1362
1363 /* BGP-GR Peer related flags */
1364 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
1365 #define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
1366 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
1367 #define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
1368 #define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
1369 #define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
1370 /* Disable IEEE floating-point link bandwidth encoding in
1371 * extended communities.
1372 */
1373 #define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
1374 /* force the extended format for Optional Parameters in OPEN message */
1375 #define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
1376
1377 /* BGP Open Policy flags.
1378 * Enforce using roles on both sides:
1379 * `local-role ROLE strict-mode` configured.
1380 */
1381 #define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
1382 /* `local-role` configured */
1383 #define PEER_FLAG_ROLE (1ULL << 32)
1384 #define PEER_FLAG_PORT (1ULL << 33)
1385 #define PEER_FLAG_AIGP (1ULL << 34)
1386 #define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
1387 #define PEER_FLAG_CAPABILITY_SOFT_VERSION (1ULL << 36)
1388
1389 /*
1390 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1391 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1392 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1393 */
1394
1395 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1396 enum peer_mode peer_gr_present_state;
1397 /* Non stop forwarding afi-safi count for BGP gr feature*/
1398 uint8_t nsf_af_count;
1399
1400 uint8_t peer_gr_new_status_flag;
1401 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1402 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1403 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1404
1405 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1406 char *tx_shutdown_message;
1407
1408 /* NSF mode (graceful restart) */
1409 uint8_t nsf[AFI_MAX][SAFI_MAX];
1410 /* EOR Send time */
1411 time_t eor_stime[AFI_MAX][SAFI_MAX];
1412 /* Last update packet sent time */
1413 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1414
1415 /* Peer Per AF flags */
1416 /*
1417 * Please consult the comments for *flags_override*, *flags_invert* and
1418 * *flags* to understand what these three arrays do. The address-family
1419 * specific attributes are being treated the exact same way as global
1420 * peer attributes.
1421 */
1422 uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
1423 uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
1424 uint64_t af_flags[AFI_MAX][SAFI_MAX];
1425 #define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
1426 #define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
1427 #define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
1428 #define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
1429 #define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
1430 #define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
1431 #define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
1432 #define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
1433 #define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
1434 #define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
1435 #define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
1436 #define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
1437 #define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
1438 #define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
1439 #define PEER_FLAG_MAX_PREFIX (1ULL << 14)
1440 #define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
1441 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
1442 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
1443 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
1444 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
1445 #define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
1446 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
1447 #define PEER_FLAG_WEIGHT (1ULL << 22)
1448 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 23)
1449 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 24)
1450 #define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 25)
1451 #define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 26)
1452 #define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 27)
1453 #define PEER_FLAG_SOO (1ULL << 28)
1454 #define PEER_FLAG_ACCEPT_OWN (1ULL << 63)
1455
1456 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1457
1458 /* MD5 password */
1459 char *password;
1460
1461 /* default-originate route-map. */
1462 struct {
1463 char *name;
1464 struct route_map *map;
1465 } default_rmap[AFI_MAX][SAFI_MAX];
1466
1467 /* Peer status flags. */
1468 uint16_t sflags;
1469 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1470 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1471 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1472 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1473 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1474 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1475 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1476 /* received extended format encoding for OPEN message */
1477 #define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
1478
1479 /* Peer status af flags (reset in bgp_stop) */
1480 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1481 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1482 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1483 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1484 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1485 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1486 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1487 #define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
1488 #define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
1489 #define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
1490 #define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
1491 #define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
1492 /* LLGR aware peer */
1493 #define PEER_STATUS_LLGR_WAIT (1U << 11)
1494 #define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
1495 #define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
1496
1497 /* Configured timer values. */
1498 _Atomic uint32_t holdtime;
1499 _Atomic uint32_t keepalive;
1500 _Atomic uint32_t connect;
1501 _Atomic uint32_t routeadv;
1502 _Atomic uint32_t delayopen;
1503
1504 /* Timer values. */
1505 _Atomic uint32_t v_start;
1506 _Atomic uint32_t v_connect;
1507 _Atomic uint32_t v_holdtime;
1508 _Atomic uint32_t v_keepalive;
1509 _Atomic uint32_t v_routeadv;
1510 _Atomic uint32_t v_delayopen;
1511 _Atomic uint32_t v_pmax_restart;
1512 _Atomic uint32_t v_gr_restart;
1513
1514 /* Threads. */
1515 struct event *t_read;
1516 struct event *t_write;
1517 struct event *t_start;
1518 struct event *t_connect_check_r;
1519 struct event *t_connect_check_w;
1520 struct event *t_connect;
1521 struct event *t_holdtime;
1522 struct event *t_routeadv;
1523 struct event *t_delayopen;
1524 struct event *t_pmax_restart;
1525 struct event *t_gr_restart;
1526 struct event *t_gr_stale;
1527 struct event *t_llgr_stale[AFI_MAX][SAFI_MAX];
1528 struct event *t_revalidate_all[AFI_MAX][SAFI_MAX];
1529 struct event *t_generate_updgrp_packets;
1530 struct event *t_process_packet;
1531 struct event *t_process_packet_error;
1532 struct event *t_refresh_stalepath;
1533
1534 /* Thread flags. */
1535 _Atomic uint32_t thread_flags;
1536 #define PEER_THREAD_WRITES_ON (1U << 0)
1537 #define PEER_THREAD_READS_ON (1U << 1)
1538 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1539 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1540
1541 /* workqueues */
1542 struct work_queue *clear_node_queue;
1543
1544 #define PEER_TOTAL_RX(peer) \
1545 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1546 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1547 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1548 + atomic_load_explicit(&peer->refresh_in, \
1549 memory_order_relaxed) \
1550 + atomic_load_explicit(&peer->keepalive_in, \
1551 memory_order_relaxed) \
1552 + atomic_load_explicit(&peer->dynamic_cap_in, \
1553 memory_order_relaxed)
1554
1555 #define PEER_TOTAL_TX(peer) \
1556 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1557 + atomic_load_explicit(&peer->update_out, \
1558 memory_order_relaxed) \
1559 + atomic_load_explicit(&peer->notify_out, \
1560 memory_order_relaxed) \
1561 + atomic_load_explicit(&peer->refresh_out, \
1562 memory_order_relaxed) \
1563 + atomic_load_explicit(&peer->keepalive_out, \
1564 memory_order_relaxed) \
1565 + atomic_load_explicit(&peer->dynamic_cap_out, \
1566 memory_order_relaxed)
1567
1568 /* Statistics field */
1569 _Atomic uint32_t open_in; /* Open message input count */
1570 _Atomic uint32_t open_out; /* Open message output count */
1571 _Atomic uint32_t update_in; /* Update message input count */
1572 _Atomic uint32_t update_out; /* Update message ouput count */
1573 _Atomic time_t update_time; /* Update message received time. */
1574 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1575 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1576 _Atomic uint32_t notify_in; /* Notify input count */
1577 _Atomic uint32_t notify_out; /* Notify output count */
1578 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1579 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1580 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1581 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1582
1583 uint32_t stat_pfx_filter;
1584 uint32_t stat_pfx_aspath_loop;
1585 uint32_t stat_pfx_originator_loop;
1586 uint32_t stat_pfx_cluster_loop;
1587 uint32_t stat_pfx_nh_invalid;
1588 uint32_t stat_pfx_dup_withdraw;
1589 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1590
1591 /* BGP state count */
1592 uint32_t established; /* Established */
1593 uint32_t dropped; /* Dropped */
1594
1595 /* Update delay related fields */
1596 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1597 for EOR */
1598
1599 /* Syncronization list and time. */
1600 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1601 time_t synctime;
1602 /* timestamp when the last UPDATE msg was written */
1603 _Atomic time_t last_write;
1604 /* timestamp when the last msg was written */
1605 _Atomic time_t last_update;
1606
1607 /* only updated under io_mtx.
1608 * last_sendq_warn is only for ratelimiting log warning messages.
1609 */
1610 time_t last_sendq_ok, last_sendq_warn;
1611
1612 /* Notify data. */
1613 struct bgp_notify notify;
1614
1615 /* Filter structure. */
1616 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1617
1618 /*
1619 * Parallel array to filter that indicates whether each filter
1620 * originates from a peer-group or if it is config that is specific to
1621 * this individual peer. If a filter is set independent of the
1622 * peer-group the appropriate bit should be set here. If this peer is a
1623 * peer-group, this memory region should be all zeros. The assumption
1624 * is that the default state for all flags is unset. Due to filters
1625 * having a direction (e.g. in/out/...), this array has a third
1626 * dimension for storing the overrides independently per direction.
1627 *
1628 * Notes:
1629 * - if a filter for an individual peer is unset, the corresponding
1630 * override flag is unset and the peer is considered to be back in
1631 * sync with the peer-group.
1632 * - This does *not* contain the filter values, rather it contains
1633 * whether the filter in filter (struct bgp_filter) is peer-specific.
1634 */
1635 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1636 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1637 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1638 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1639 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1640 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1641 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1642
1643 /* ORF Prefix-list */
1644 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1645
1646 /* Text description of last attribute rcvd */
1647 char rcvd_attr_str[BUFSIZ];
1648
1649 /* Track if we printed the attribute in debugs */
1650 int rcvd_attr_printed;
1651
1652 /* Accepted prefix count */
1653 uint32_t pcount[AFI_MAX][SAFI_MAX];
1654
1655 /* Max prefix count. */
1656 uint32_t pmax[AFI_MAX][SAFI_MAX];
1657 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1658 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1659 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1660
1661 /* Send prefix count. */
1662 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1663
1664 /* allowas-in. */
1665 char allowas_in[AFI_MAX][SAFI_MAX];
1666
1667 /* soo */
1668 struct ecommunity *soo[AFI_MAX][SAFI_MAX];
1669
1670 /* weight */
1671 unsigned long weight[AFI_MAX][SAFI_MAX];
1672
1673 /* peer reset cause */
1674 uint8_t last_reset;
1675 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1676 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1677 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1678 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1679 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1680 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1681 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1682 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1683 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1684 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1685 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1686 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1687 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1688 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1689 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1690 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1691 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1692 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1693 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1694 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1695 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1696 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1697 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1698 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1699 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1700 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1701 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1702 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1703 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1704 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1705 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1706 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1707 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1708 #define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
1709 #define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
1710 /*
1711 * Remember to update peer_down_str in bgp_fsm.c when you add
1712 * a new value to the last_reset reason
1713 */
1714
1715 uint16_t last_reset_cause_size;
1716 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1717
1718 /* The kind of route-map Flags.*/
1719 uint16_t rmap_type;
1720 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1721 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1722 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1723 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1724 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1725 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1726 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1727 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1728 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1729
1730 /** Peer overwrite configuration. */
1731 struct bfd_session_config {
1732 /**
1733 * Manual configuration bit.
1734 *
1735 * This flag only makes sense for real peers (and not groups),
1736 * it keeps track if the user explicitly configured BFD for a
1737 * peer.
1738 */
1739 bool manual;
1740 /** Control Plane Independent. */
1741 bool cbit;
1742 /** Detection multiplier. */
1743 uint8_t detection_multiplier;
1744 /** Minimum required RX interval. */
1745 uint32_t min_rx;
1746 /** Minimum required TX interval. */
1747 uint32_t min_tx;
1748 /** Profile name. */
1749 char profile[BFD_PROFILE_NAME_LEN];
1750 /** Peer BFD session */
1751 struct bfd_session_params *session;
1752 } * bfd_config;
1753
1754 /* hostname and domainname advertised by host */
1755 char *hostname;
1756 char *domainname;
1757
1758 /* Sender side AS path loop detection. */
1759 bool as_path_loop_detection;
1760
1761 /* Extended Message Support */
1762 uint16_t max_packet_size;
1763
1764 /* Conditional advertisement */
1765 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1766 bool advmap_table_change;
1767
1768 /* set TCP max segment size */
1769 uint32_t tcp_mss;
1770
1771 /* Long-lived Graceful Restart */
1772 struct llgr_info llgr[AFI_MAX][SAFI_MAX];
1773
1774 bool shut_during_cfg;
1775
1776 #define BGP_ATTR_MAX 255
1777 /* Path attributes discard */
1778 bool discard_attrs[BGP_ATTR_MAX];
1779
1780 /* Path attributes treat-as-withdraw */
1781 bool withdraw_attrs[BGP_ATTR_MAX];
1782
1783 /* BGP Software Version Capability */
1784 #define BGP_MAX_SOFT_VERSION 64
1785 char *soft_version;
1786
1787 QOBJ_FIELDS;
1788 };
1789 DECLARE_QOBJ_TYPE(peer);
1790
1791 /* Inherit peer attribute from peer-group. */
1792 #define PEER_ATTR_INHERIT(peer, group, attr) \
1793 ((peer)->attr = (group)->conf->attr)
1794 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1795 do { \
1796 XFREE(mt, (peer)->attr); \
1797 if ((group)->conf->attr) \
1798 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1799 else \
1800 (peer)->attr = NULL; \
1801 } while (0)
1802 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1803 do { \
1804 if ((peer)->attr) \
1805 sockunion_free((peer)->attr); \
1806 if ((group)->conf->attr) \
1807 (peer)->attr = sockunion_dup((group)->conf->attr); \
1808 else \
1809 (peer)->attr = NULL; \
1810 } while (0)
1811
1812 /* Check if suppress start/restart of sessions to peer. */
1813 #define BGP_PEER_START_SUPPRESSED(P) \
1814 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
1815 CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
1816 CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
1817 (P)->shut_during_cfg)
1818
1819 #define PEER_ROUTE_ADV_DELAY(peer) \
1820 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1821
1822 #define PEER_PASSWORD_MINLEN (1)
1823 #define PEER_PASSWORD_MAXLEN (80)
1824
1825 /* This structure's member directly points incoming packet data
1826 stream. */
1827 struct bgp_nlri {
1828 /* AFI. */
1829 uint16_t afi; /* iana_afi_t */
1830
1831 /* SAFI. */
1832 uint8_t safi; /* iana_safi_t */
1833
1834 /* Pointer to NLRI byte stream. */
1835 uint8_t *nlri;
1836
1837 /* Length of whole NLRI. */
1838 bgp_size_t length;
1839 };
1840
1841 /* BGP versions. */
1842 #define BGP_VERSION_4 4
1843
1844 /* Default BGP port number. */
1845 #define BGP_PORT_DEFAULT 179
1846
1847 /* Extended BGP Administrative Shutdown Communication */
1848 #define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
1849
1850 /* BGP minimum message size. */
1851 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1852 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1853 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1854 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1855 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1856 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1857
1858 /* BGP message types. */
1859 #define BGP_MSG_OPEN 1
1860 #define BGP_MSG_UPDATE 2
1861 #define BGP_MSG_NOTIFY 3
1862 #define BGP_MSG_KEEPALIVE 4
1863 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1864 #define BGP_MSG_CAPABILITY 6
1865 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1866
1867 /* BGP open optional parameter. */
1868 #define BGP_OPEN_OPT_CAP 2
1869
1870 /* BGP4 attribute type codes. */
1871 #define BGP_ATTR_ORIGIN 1
1872 #define BGP_ATTR_AS_PATH 2
1873 #define BGP_ATTR_NEXT_HOP 3
1874 #define BGP_ATTR_MULTI_EXIT_DISC 4
1875 #define BGP_ATTR_LOCAL_PREF 5
1876 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1877 #define BGP_ATTR_AGGREGATOR 7
1878 #define BGP_ATTR_COMMUNITIES 8
1879 #define BGP_ATTR_ORIGINATOR_ID 9
1880 #define BGP_ATTR_CLUSTER_LIST 10
1881 #define BGP_ATTR_MP_REACH_NLRI 14
1882 #define BGP_ATTR_MP_UNREACH_NLRI 15
1883 #define BGP_ATTR_EXT_COMMUNITIES 16
1884 #define BGP_ATTR_AS4_PATH 17
1885 #define BGP_ATTR_AS4_AGGREGATOR 18
1886 #define BGP_ATTR_PMSI_TUNNEL 22
1887 #define BGP_ATTR_ENCAP 23
1888 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1889 #define BGP_ATTR_AIGP 26
1890 #define BGP_ATTR_LARGE_COMMUNITIES 32
1891 #define BGP_ATTR_OTC 35
1892 #define BGP_ATTR_PREFIX_SID 40
1893 #define BGP_ATTR_SRTE_COLOR 51
1894 #ifdef ENABLE_BGP_VNC_ATTR
1895 #define BGP_ATTR_VNC 255
1896 #endif
1897
1898 /* BGP update origin. */
1899 #define BGP_ORIGIN_IGP 0
1900 #define BGP_ORIGIN_EGP 1
1901 #define BGP_ORIGIN_INCOMPLETE 2
1902 #define BGP_ORIGIN_UNSPECIFIED 255
1903
1904 /* BGP notify message codes. */
1905 #define BGP_NOTIFY_HEADER_ERR 1
1906 #define BGP_NOTIFY_OPEN_ERR 2
1907 #define BGP_NOTIFY_UPDATE_ERR 3
1908 #define BGP_NOTIFY_HOLD_ERR 4
1909 #define BGP_NOTIFY_FSM_ERR 5
1910 #define BGP_NOTIFY_CEASE 6
1911 #define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
1912
1913 /* Subcodes for BGP Finite State Machine Error */
1914 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1915 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1916 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1917 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1918
1919 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1920
1921 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1922 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1923 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1924 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1925
1926 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1927 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1928 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1929 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1930 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1931 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1932 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1933 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1934 #define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
1935
1936 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1937 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1938 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1939 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1940 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1941 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1942 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1943 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1944 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1945 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1946 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1947
1948 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1949 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1950 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1951 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1952 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1953 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1954 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1955 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1956 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1957 #define BGP_NOTIFY_CEASE_HARD_RESET 9
1958 #define BGP_NOTIFY_CEASE_BFD_DOWN 10
1959
1960 /* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
1961 #define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
1962
1963 /* BGP route refresh optional subtypes. */
1964 #define BGP_ROUTE_REFRESH_NORMAL 0
1965 #define BGP_ROUTE_REFRESH_BORR 1
1966 #define BGP_ROUTE_REFRESH_EORR 2
1967
1968 /* BGP timers default value. */
1969 #define BGP_INIT_START_TIMER 1
1970 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1971 * version-/profile-specific values. The values here do not matter, they only
1972 * exist to provide a clear layering separation between core and CLI.
1973 */
1974 #define BGP_DEFAULT_HOLDTIME 180
1975 #define BGP_DEFAULT_KEEPALIVE 60
1976 #define BGP_DEFAULT_CONNECT_RETRY 120
1977
1978 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1979 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1980
1981 /* BGP RFC 4271 DelayOpenTime default value */
1982 #define BGP_DEFAULT_DELAYOPEN 120
1983
1984 /* BGP default local preference. */
1985 #define BGP_DEFAULT_LOCAL_PREF 100
1986
1987 /* BGP local-preference to send when 'bgp graceful-shutdown'
1988 * is configured */
1989 #define BGP_GSHUT_LOCAL_PREF 0
1990
1991 /* BGP default subgroup packet queue max . */
1992 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1993
1994 /* BGP graceful restart */
1995 #define BGP_DEFAULT_RESTART_TIME 120
1996 #define BGP_DEFAULT_STALEPATH_TIME 360
1997 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1998 #define BGP_DEFAULT_RIB_STALE_TIME 500
1999 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
2000
2001 /* BGP Long-lived Graceful Restart */
2002 #define BGP_DEFAULT_LLGR_STALE_TIME 0
2003
2004 /* BGP uptime string length. */
2005 #define BGP_UPTIME_LEN 25
2006
2007 /* Default configuration settings for bgpd. */
2008 #define BGP_VTY_PORT 2605
2009 #define BGP_DEFAULT_CONFIG "bgpd.conf"
2010
2011 /* BGP Dynamic Neighbors feature */
2012 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
2013 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
2014 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
2015
2016 /* BGP AIGP */
2017 #define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
2018 #define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
2019 #define BGP_AIGP_TLV_METRIC_LEN 11
2020 #define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
2021 #define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
2022
2023 /* Flag for peer_clear_soft(). */
2024 enum bgp_clear_type {
2025 BGP_CLEAR_SOFT_NONE,
2026 BGP_CLEAR_SOFT_OUT,
2027 BGP_CLEAR_SOFT_IN,
2028 BGP_CLEAR_SOFT_BOTH,
2029 BGP_CLEAR_SOFT_IN_ORF_PREFIX,
2030 BGP_CLEAR_MESSAGE_STATS
2031 };
2032
2033 /* Macros. */
2034 #define BGP_INPUT(P) ((P)->curr)
2035 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
2036 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
2037 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
2038
2039 /* BGP error codes. */
2040 enum bgp_create_error_code {
2041 BGP_SUCCESS = 0,
2042 BGP_CREATED = 1,
2043 BGP_ERR_INVALID_VALUE = -1,
2044 BGP_ERR_INVALID_FLAG = -2,
2045 BGP_ERR_INVALID_AS = -3,
2046 BGP_ERR_PEER_GROUP_MEMBER = -4,
2047 BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
2048 BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
2049 BGP_ERR_PEER_GROUP_MISMATCH = -7,
2050 BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
2051 BGP_ERR_AS_MISMATCH = -9,
2052 BGP_ERR_PEER_FLAG_CONFLICT = -10,
2053 BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
2054 BGP_ERR_PEER_FILTER_CONFLICT = -12,
2055 BGP_ERR_NOT_INTERNAL_PEER = -13,
2056 BGP_ERR_REMOVE_PRIVATE_AS = -14,
2057 BGP_ERR_AF_UNCONFIGURED = -15,
2058 BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
2059 BGP_ERR_INSTANCE_MISMATCH = -17,
2060 BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
2061 BGP_ERR_TCPSIG_FAILED = -20,
2062 BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
2063 BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
2064 BGP_ERR_NO_INTERFACE_CONFIG = -23,
2065 BGP_ERR_AS_OVERRIDE = -25,
2066 BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
2067 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
2068 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
2069 BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
2070 BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
2071 BGP_ERR_PEER_SAFI_CONFLICT = -31,
2072
2073 /* BGP GR ERRORS */
2074 BGP_ERR_GR_INVALID_CMD = -32,
2075 BGP_ERR_GR_OPERATION_FAILED = -33,
2076 BGP_GR_NO_OPERATION = -34,
2077
2078 /*BGP Open Policy ERRORS */
2079 BGP_ERR_INVALID_ROLE_NAME = -35,
2080 BGP_ERR_INVALID_INTERNAL_ROLE = -36
2081 };
2082
2083 /*
2084 * Enumeration of different policy kinds a peer can be configured with.
2085 */
2086 enum bgp_policy_type {
2087 BGP_POLICY_ROUTE_MAP,
2088 BGP_POLICY_FILTER_LIST,
2089 BGP_POLICY_PREFIX_LIST,
2090 BGP_POLICY_DISTRIBUTE_LIST,
2091 };
2092
2093 /* peer_flag_change_type. */
2094 enum peer_change_type {
2095 peer_change_none,
2096 peer_change_reset,
2097 peer_change_reset_in,
2098 peer_change_reset_out,
2099 };
2100
2101 extern struct bgp_master *bm;
2102 extern unsigned int multipath_num;
2103
2104 /* Prototypes. */
2105 extern void bgp_terminate(void);
2106 extern void bgp_reset(void);
2107 extern void bgp_zclient_reset(void);
2108 extern struct bgp *bgp_get_default(void);
2109 extern struct bgp *bgp_lookup(as_t, const char *);
2110 extern struct bgp *bgp_lookup_by_name(const char *);
2111 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
2112 extern struct bgp *bgp_get_evpn(void);
2113 extern void bgp_set_evpn(struct bgp *bgp);
2114 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
2115 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
2116 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
2117 extern void bgp_peer_conf_if_to_su_update(struct peer *);
2118 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
2119 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
2120 extern struct peer_group *peer_group_get(struct bgp *, const char *);
2121 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
2122 union sockunion *,
2123 struct peer_group *);
2124 extern struct prefix *
2125 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
2126 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
2127 struct prefix *,
2128 struct prefix **);
2129 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
2130 union sockunion *);
2131
2132 /*
2133 * Peers are incredibly easy to memory leak
2134 * due to the various ways that they are actually used
2135 * Provide some functionality to debug locks and unlocks
2136 */
2137 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
2138 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
2139 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
2140 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
2141
2142 extern enum bgp_peer_sort peer_sort(struct peer *peer);
2143 extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
2144
2145 extern bool peer_active(struct peer *);
2146 extern bool peer_active_nego(struct peer *);
2147 extern bool peer_afc_received(struct peer *peer);
2148 extern bool peer_afc_advertised(struct peer *peer);
2149 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
2150 extern struct peer *peer_create(union sockunion *su, const char *conf_if,
2151 struct bgp *bgp, as_t local_as, as_t remote_as,
2152 int as_type, struct peer_group *group,
2153 bool config_node, const char *as_str);
2154 extern struct peer *peer_create_accept(struct bgp *);
2155 extern void peer_xfer_config(struct peer *dst, struct peer *src);
2156 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
2157 json_object *json);
2158
2159 extern int bgp_config_write(struct vty *);
2160
2161 extern void bgp_master_init(struct event_loop *master, const int buffer_size,
2162 struct list *addresses);
2163
2164 extern void bgp_init(unsigned short instance);
2165 extern void bgp_pthreads_run(void);
2166 extern void bgp_pthreads_finish(void);
2167 extern void bgp_route_map_init(void);
2168 extern void bgp_session_reset(struct peer *);
2169
2170 extern int bgp_option_set(int);
2171 extern int bgp_option_unset(int);
2172 extern int bgp_option_check(int);
2173
2174 /* set the bgp no-rib option during runtime and remove installed routes */
2175 extern void bgp_option_norib_set_runtime(void);
2176
2177 /* unset the bgp no-rib option during runtime and reset all peers */
2178 extern void bgp_option_norib_unset_runtime(void);
2179
2180 extern int bgp_get(struct bgp **bgp, as_t *as, const char *name,
2181 enum bgp_instance_type kind, const char *as_pretty,
2182 enum asnotation_mode asnotation);
2183 extern void bgp_instance_up(struct bgp *);
2184 extern void bgp_instance_down(struct bgp *);
2185 extern int bgp_delete(struct bgp *);
2186
2187 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
2188 vrf_id_t old_vrf_id, bool create);
2189
2190 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
2191 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
2192
2193 extern void bm_wait_for_fib_set(bool set);
2194 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
2195 extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
2196 extern void bgp_cluster_id_unset(struct bgp *bgp);
2197
2198 extern void bgp_confederation_id_set(struct bgp *bgp, as_t as,
2199 const char *as_str);
2200 extern void bgp_confederation_id_unset(struct bgp *bgp);
2201 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
2202
2203 extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as,
2204 const char *as_str);
2205 extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
2206
2207 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
2208 uint32_t connect_retry, uint32_t delayopen);
2209 extern void bgp_timers_unset(struct bgp *);
2210
2211 extern void bgp_default_local_preference_set(struct bgp *bgp,
2212 uint32_t local_pref);
2213 extern void bgp_default_local_preference_unset(struct bgp *bgp);
2214
2215 extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
2216 uint32_t queue_size);
2217 extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
2218
2219 extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
2220 extern void bgp_listen_limit_unset(struct bgp *bgp);
2221
2222 extern bool bgp_update_delay_active(struct bgp *);
2223 extern bool bgp_update_delay_configured(struct bgp *);
2224 extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
2225 extern void peer_as_change(struct peer *peer, as_t as, int as_type,
2226 const char *as_str);
2227 extern int peer_remote_as(struct bgp *bgp, union sockunion *su,
2228 const char *conf_if, as_t *as, int as_type,
2229 const char *as_str);
2230 extern int peer_group_remote_as(struct bgp *bgp, const char *peer_str, as_t *as,
2231 int as_type, const char *as_str);
2232 extern int peer_delete(struct peer *peer);
2233 extern void peer_notify_unconfig(struct peer *peer);
2234 extern int peer_group_delete(struct peer_group *);
2235 extern int peer_group_remote_as_delete(struct peer_group *);
2236 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
2237 extern void peer_group_notify_unconfig(struct peer_group *group);
2238
2239 extern int peer_activate(struct peer *, afi_t, safi_t);
2240 extern int peer_deactivate(struct peer *, afi_t, safi_t);
2241
2242 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
2243 struct peer_group *, as_t *);
2244
2245 extern int peer_flag_set(struct peer *peer, uint64_t flag);
2246 extern int peer_flag_unset(struct peer *peer, uint64_t flag);
2247 extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
2248
2249 extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
2250 uint64_t flag);
2251 extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
2252 uint64_t flag);
2253 extern bool peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi,
2254 uint64_t flag);
2255 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
2256 uint64_t flag);
2257 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
2258 enum peer_change_type type);
2259
2260 extern int peer_ebgp_multihop_set(struct peer *, int);
2261 extern int peer_ebgp_multihop_unset(struct peer *);
2262 extern int is_ebgp_multihop_configured(struct peer *peer);
2263
2264 extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
2265 extern int peer_role_unset(struct peer *peer);
2266
2267 extern void peer_description_set(struct peer *, const char *);
2268 extern void peer_description_unset(struct peer *);
2269
2270 extern int peer_update_source_if_set(struct peer *, const char *);
2271 extern void peer_update_source_addr_set(struct peer *peer,
2272 const union sockunion *su);
2273 extern void peer_update_source_unset(struct peer *peer);
2274
2275 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
2276 const char *rmap,
2277 struct route_map *route_map);
2278 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
2279 extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
2280 uint16_t interval, uint16_t probes);
2281 extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
2282
2283 extern void peer_port_set(struct peer *, uint16_t);
2284 extern void peer_port_unset(struct peer *);
2285
2286 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
2287 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
2288
2289 extern int peer_timers_set(struct peer *, uint32_t keepalive,
2290 uint32_t holdtime);
2291 extern int peer_timers_unset(struct peer *);
2292
2293 extern int peer_timers_connect_set(struct peer *, uint32_t);
2294 extern int peer_timers_connect_unset(struct peer *);
2295
2296 extern int peer_advertise_interval_set(struct peer *, uint32_t);
2297 extern int peer_advertise_interval_unset(struct peer *);
2298
2299 extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
2300 extern int peer_timers_delayopen_unset(struct peer *peer);
2301
2302 extern void peer_interface_set(struct peer *, const char *);
2303 extern void peer_interface_unset(struct peer *);
2304
2305 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
2306 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
2307
2308 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
2309 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
2310
2311 extern int peer_local_as_set(struct peer *peer, as_t as, bool no_prepend,
2312 bool replace_as, const char *as_str);
2313 extern int peer_local_as_unset(struct peer *);
2314
2315 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
2316 const char *);
2317 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
2318
2319 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
2320 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
2321
2322 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
2323 const char *name, struct route_map *route_map);
2324 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
2325
2326 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2327 const char *name,
2328 struct route_map *route_map);
2329
2330 extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
2331 const char *advertise_name,
2332 struct route_map *advertise_map,
2333 const char *condition_name,
2334 struct route_map *condition_map,
2335 bool condition);
2336
2337 extern int peer_password_set(struct peer *, const char *);
2338 extern int peer_password_unset(struct peer *);
2339
2340 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2341
2342 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2343 const char *advertise_name,
2344 struct route_map *advertise_map,
2345 const char *condition_name,
2346 struct route_map *condition_map,
2347 bool condition);
2348
2349 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2350 uint8_t, int, uint16_t, bool force);
2351 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2352
2353 extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
2354 safi_t safi);
2355 extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
2356 safi_t safi, uint32_t max);
2357 extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
2358 safi_t safi);
2359
2360 extern int peer_clear(struct peer *, struct listnode **);
2361 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2362
2363 extern int peer_ttl_security_hops_set(struct peer *, int);
2364 extern int peer_ttl_security_hops_unset(struct peer *);
2365
2366 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2367 extern void peer_tx_shutdown_message_unset(struct peer *);
2368
2369 extern void bgp_route_map_update_timer(struct event *thread);
2370 extern const char *bgp_get_name_by_role(uint8_t role);
2371 extern enum asnotation_mode bgp_get_asnotation(struct bgp *bgp);
2372
2373 extern void bgp_route_map_terminate(void);
2374
2375 extern int peer_cmp(struct peer *p1, struct peer *p2);
2376
2377 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2378 afi_t *afi, safi_t *safi);
2379 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2380 iana_afi_t *pkt_afi,
2381 iana_safi_t *pkt_safi);
2382
2383 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2384 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2385 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2386
2387 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2388 extern void bgp_shutdown_disable(struct bgp *bgp);
2389
2390 extern void bgp_close(void);
2391 extern void bgp_free(struct bgp *);
2392 void bgp_gr_apply_running_config(void);
2393
2394 /* BGP GR */
2395 int bgp_global_gr_init(struct bgp *bgp);
2396 int bgp_peer_gr_init(struct peer *peer);
2397
2398
2399 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2400 do { \
2401 struct peer *peer_loop; \
2402 bool gr_router_detected = false; \
2403 struct listnode *node = {0}; \
2404 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2405 if (CHECK_FLAG(peer_loop->flags, \
2406 PEER_FLAG_GRACEFUL_RESTART)) \
2407 gr_router_detected = true; \
2408 } \
2409 if (gr_router_detected \
2410 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2411 bgp_zebra_send_capabilities(_bgp, false); \
2412 } else if (!gr_router_detected \
2413 && _bgp->present_zebra_gr_state \
2414 == ZEBRA_GR_ENABLE) { \
2415 bgp_zebra_send_capabilities(_bgp, true); \
2416 } \
2417 } while (0)
2418
2419 static inline struct bgp *bgp_lock(struct bgp *bgp)
2420 {
2421 bgp->lock++;
2422 return bgp;
2423 }
2424
2425 static inline void bgp_unlock(struct bgp *bgp)
2426 {
2427 assert(bgp->lock > 0);
2428 if (--bgp->lock == 0)
2429 bgp_free(bgp);
2430 }
2431
2432 static inline int afindex(afi_t afi, safi_t safi)
2433 {
2434 switch (afi) {
2435 case AFI_IP:
2436 switch (safi) {
2437 case SAFI_UNICAST:
2438 return BGP_AF_IPV4_UNICAST;
2439 case SAFI_MULTICAST:
2440 return BGP_AF_IPV4_MULTICAST;
2441 case SAFI_LABELED_UNICAST:
2442 return BGP_AF_IPV4_LBL_UNICAST;
2443 case SAFI_MPLS_VPN:
2444 return BGP_AF_IPV4_VPN;
2445 case SAFI_ENCAP:
2446 return BGP_AF_IPV4_ENCAP;
2447 case SAFI_FLOWSPEC:
2448 return BGP_AF_IPV4_FLOWSPEC;
2449 case SAFI_EVPN:
2450 case SAFI_UNSPEC:
2451 case SAFI_MAX:
2452 return BGP_AF_MAX;
2453 }
2454 break;
2455 case AFI_IP6:
2456 switch (safi) {
2457 case SAFI_UNICAST:
2458 return BGP_AF_IPV6_UNICAST;
2459 case SAFI_MULTICAST:
2460 return BGP_AF_IPV6_MULTICAST;
2461 case SAFI_LABELED_UNICAST:
2462 return BGP_AF_IPV6_LBL_UNICAST;
2463 case SAFI_MPLS_VPN:
2464 return BGP_AF_IPV6_VPN;
2465 case SAFI_ENCAP:
2466 return BGP_AF_IPV6_ENCAP;
2467 case SAFI_FLOWSPEC:
2468 return BGP_AF_IPV6_FLOWSPEC;
2469 case SAFI_EVPN:
2470 case SAFI_UNSPEC:
2471 case SAFI_MAX:
2472 return BGP_AF_MAX;
2473 }
2474 break;
2475 case AFI_L2VPN:
2476 switch (safi) {
2477 case SAFI_EVPN:
2478 return BGP_AF_L2VPN_EVPN;
2479 case SAFI_UNICAST:
2480 case SAFI_MULTICAST:
2481 case SAFI_LABELED_UNICAST:
2482 case SAFI_MPLS_VPN:
2483 case SAFI_ENCAP:
2484 case SAFI_FLOWSPEC:
2485 case SAFI_UNSPEC:
2486 case SAFI_MAX:
2487 return BGP_AF_MAX;
2488 }
2489 break;
2490 case AFI_UNSPEC:
2491 case AFI_MAX:
2492 return BGP_AF_MAX;
2493 }
2494
2495 assert(!"Reached end of function we should never hit");
2496 }
2497
2498 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2499 static inline int peer_group_active(struct peer *peer)
2500 {
2501 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2502 return 1;
2503 return 0;
2504 }
2505
2506 /* If peer is negotiated at least one address family return 1. */
2507 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2508 {
2509 if (peer->afc_nego[afi][SAFI_UNICAST]
2510 || peer->afc_nego[afi][SAFI_MULTICAST]
2511 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2512 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2513 || peer->afc_nego[afi][SAFI_ENCAP]
2514 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2515 || peer->afc_nego[afi][SAFI_EVPN])
2516 return 1;
2517 return 0;
2518 }
2519
2520 /* If at least one address family activated for group, return 1. */
2521 static inline int peer_group_af_configured(struct peer_group *group)
2522 {
2523 struct peer *peer = group->conf;
2524
2525 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2526 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2527 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2528 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2529 || peer->afc[AFI_IP6][SAFI_UNICAST]
2530 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2531 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2532 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2533 || peer->afc[AFI_IP6][SAFI_ENCAP]
2534 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2535 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2536 return 1;
2537 return 0;
2538 }
2539
2540 static inline char *timestamp_string(time_t ts)
2541 {
2542 time_t tbuf;
2543 tbuf = time(NULL) - (monotime(NULL) - ts);
2544 return ctime(&tbuf);
2545 }
2546
2547 static inline bool peer_established(struct peer *peer)
2548 {
2549 return peer->status == Established;
2550 }
2551
2552 static inline bool peer_dynamic_neighbor(struct peer *peer)
2553 {
2554 return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
2555 }
2556
2557 static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
2558 {
2559 return (peer_dynamic_neighbor(peer) &&
2560 !CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
2561 }
2562
2563 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2564 {
2565 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2566 }
2567
2568 /* Lookup VRF for BGP instance based on its type. */
2569 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2570 {
2571 struct vrf *vrf;
2572
2573 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2574 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2575 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2576 vrf = vrf_lookup_by_name(bgp->name);
2577 else
2578 vrf = NULL;
2579
2580 return vrf;
2581 }
2582
2583 static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
2584 {
2585 struct vrf *vrf;
2586 struct interface *ifp;
2587 uint32_t count = 0;
2588
2589 /* if there is one interface in the vrf which is up then it is deemed
2590 * active
2591 */
2592 vrf = bgp_vrf_lookup_by_instance_type(bgp);
2593 if (vrf == NULL)
2594 return 0;
2595 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
2596 if (strcmp(ifp->name, bgp->name) == 0)
2597 continue;
2598 if (!active || if_is_up(ifp))
2599 count++;
2600 }
2601 return count;
2602 }
2603
2604 /* Link BGP instance to VRF. */
2605 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2606 {
2607 bgp->vrf_id = vrf->vrf_id;
2608 if (vrf->info != (void *)bgp)
2609 vrf->info = (void *)bgp_lock(bgp);
2610 }
2611
2612 /* Unlink BGP instance from VRF. */
2613 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2614 {
2615 if (vrf->info == (void *)bgp) {
2616 vrf->info = NULL;
2617 bgp_unlock(bgp);
2618 }
2619 bgp->vrf_id = VRF_UNKNOWN;
2620 }
2621
2622 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2623 {
2624 /* True if either set for this instance or globally */
2625 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2626 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2627 }
2628
2629 /* For benefit of rfapi */
2630 extern struct peer *peer_new(struct bgp *bgp);
2631
2632 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2633 const char *ip_str, bool use_json);
2634 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2635 const char *name,
2636 enum bgp_instance_type inst_type);
2637
2638 /* Hooks */
2639 DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
2640 (bgp, ifp));
2641 DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
2642 DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
2643 DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
2644 DECLARE_HOOK(bgp_snmp_update_stats,
2645 (struct bgp_node *rn, struct bgp_path_info *pi, bool added),
2646 (rn, pi, added));
2647 DECLARE_HOOK(bgp_rpki_prefix_status,
2648 (struct peer * peer, struct attr *attr,
2649 const struct prefix *prefix),
2650 (peer, attr, prefix));
2651
2652 void peer_nsf_stop(struct peer *peer);
2653
2654 void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
2655 void peer_tcp_mss_unset(struct peer *peer);
2656
2657 extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
2658 safi_t safi);
2659 extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
2660 int outbound);
2661 extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
2662 size_t size);
2663 extern bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
2664 size_t size);
2665 #ifdef _FRR_ATTRIBUTE_PRINTFRR
2666 /* clang-format off */
2667 #pragma FRR printfrr_ext "%pBP" (struct peer *)
2668 /* clang-format on */
2669 #endif
2670
2671 #endif /* _QUAGGA_BGPD_H */
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