]> git.proxmox.com Git - mirror_frr.git/blob - bgpd/bgpd.h
projects / mirror_frr.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge pull request #13366 from zmw12306/rte_tag
[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 IPv4 local prefixes to use ipv4-explicit-null label */
504 #define BGP_FLAG_LU_IPV4_EXPLICIT_NULL (1ULL << 33)
505 /* For BGP-LU, force IPv6 local prefixes to use ipv6-explicit-null label */
506 #define BGP_FLAG_LU_IPV6_EXPLICIT_NULL (1ULL << 34)
507
508 /* BGP default address-families.
509 * New peers inherit enabled afi/safis from bgp instance.
510 */
511 uint16_t default_af[AFI_MAX][SAFI_MAX];
512
513 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
514 [BGP_GLOBAL_GR_EVENT_CMD];
515 enum global_mode global_gr_present_state;
516
517 /* This variable stores the current Graceful Restart state of Zebra
518 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
519 */
520 enum zebra_gr_mode present_zebra_gr_state;
521
522 /* BGP Per AF flags */
523 uint16_t af_flags[AFI_MAX][SAFI_MAX];
524 #define BGP_CONFIG_DAMPENING (1 << 0)
525 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
526 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
527 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
528 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
529 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
530 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
531 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
532 /* import/export between address families */
533 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
534 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
535 /* vrf-route leaking flags */
536 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
537 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
538 /* vpnvx retain flag */
539 #define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
540
541 /* BGP per AF peer count */
542 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
543
544 /* Tree for next-hop lookup cache. */
545 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
546
547 /* Tree for import-check */
548 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
549
550 struct bgp_table *connected_table[AFI_MAX];
551
552 struct hash *address_hash;
553
554 /* DB for all local tunnel-ips - used mainly for martian checks
555 Currently it only has all VxLan tunnel IPs*/
556 struct hash *tip_hash;
557
558 /* Static route configuration. */
559 struct bgp_table *route[AFI_MAX][SAFI_MAX];
560
561 /* Aggregate address configuration. */
562 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
563
564 /* BGP routing information base. */
565 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
566
567 /* BGP table route-map. */
568 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
569
570 /* BGP redistribute configuration. */
571 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
572
573 /* Allocate MPLS labels */
574 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
575
576 /* Allocate hash entries to store policy routing information
577 * The hash are used to host pbr rules somewhere.
578 * Actually, pbr will only be used by flowspec
579 * those hash elements will have relationship together as
580 * illustrated in below diagram:
581 *
582 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
583 * <----- pbr_match j <--- pbr_match_entry 1..m
584 * <----- pbr_rule k
585 *
586 * - here in BGP structure, the list of match and actions will
587 * stand for the list of ipset sets, and table_ids in the kernel
588 * - the arrow above between pbr_match and pbr_action indicate
589 * that a backpointer permits match to find the action
590 * - the arrow betwen match_entry and match is a hash list
591 * contained in match, that lists the whole set of entries
592 */
593 struct hash *pbr_match_hash;
594 struct hash *pbr_rule_hash;
595 struct hash *pbr_action_hash;
596
597 /* timer to re-evaluate neighbor default-originate route-maps */
598 struct event *t_rmap_def_originate_eval;
599 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
600
601 /* BGP distance configuration. */
602 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
603 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
604 uint8_t distance_local[AFI_MAX][SAFI_MAX];
605
606 /* BGP default local-preference. */
607 uint32_t default_local_pref;
608
609 /* BGP default subgroup pkt queue max */
610 uint32_t default_subgroup_pkt_queue_max;
611
612 /* BGP default timer. */
613 uint32_t default_holdtime;
614 uint32_t default_keepalive;
615 uint32_t default_connect_retry;
616 uint32_t default_delayopen;
617
618 /* BGP minimum holdtime. */
619 uint16_t default_min_holdtime;
620
621 /* BGP graceful restart */
622 uint32_t restart_time;
623 uint32_t stalepath_time;
624 uint32_t select_defer_time;
625 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
626 uint32_t rib_stale_time;
627
628 /* BGP Long-lived Graceful Restart */
629 uint32_t llgr_stale_time;
630
631 #define BGP_ROUTE_SELECT_DELAY 1
632 #define BGP_MAX_BEST_ROUTE_SELECT 10000
633 /* Maximum-paths configuration */
634 struct bgp_maxpaths_cfg {
635 uint16_t maxpaths_ebgp;
636 uint16_t maxpaths_ibgp;
637 bool same_clusterlen;
638 } maxpaths[AFI_MAX][SAFI_MAX];
639
640 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
641 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
642
643 /* Automatic coalesce adjust on/off */
644 bool heuristic_coalesce;
645 /* Actual coalesce time */
646 uint32_t coalesce_time;
647
648 /* Auto-shutdown new peers */
649 bool autoshutdown;
650
651 struct bgp_addpath_bgp_data tx_addpath;
652
653 #ifdef ENABLE_BGP_VNC
654 struct rfapi_cfg *rfapi_cfg;
655 struct rfapi *rfapi;
656 #endif
657
658 /* EVPN related information */
659
660 /* EVI hash table */
661 struct hash *vnihash;
662
663 /*
664 * VNI hash table based on SVI ifindex as its key.
665 * We use SVI ifindex as key to lookup a VNI table for gateway IP
666 * overlay index recursive lookup.
667 * For this purpose, a hashtable is added which optimizes this lookup.
668 */
669 struct hash *vni_svi_hash;
670
671 /* EVPN enable - advertise gateway macip routes */
672 int advertise_gw_macip;
673
674 /* EVPN enable - advertise local VNIs and their MACs etc. */
675 int advertise_all_vni;
676
677 /* draft-ietf-idr-deprecate-as-set-confed-set
678 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
679 */
680 bool reject_as_sets;
681
682 struct bgp_evpn_info *evpn_info;
683
684 /* EVPN - use RFC 8365 to auto-derive RT */
685 int advertise_autort_rfc8365;
686
687 /*
688 * Flooding mechanism for BUM packets for VxLAN-EVPN.
689 */
690 enum vxlan_flood_control vxlan_flood_ctrl;
691
692 /* Hash table of Import RTs to EVIs */
693 struct hash *import_rt_hash;
694
695 /* Hash table of VRF import RTs to VRFs */
696 struct hash *vrf_import_rt_hash;
697
698 /* L3-VNI corresponding to this vrf */
699 vni_t l3vni;
700
701 /* router-mac to be used in mac-ip routes for this vrf */
702 struct ethaddr rmac;
703
704 /* originator ip - to be used as NH for type-5 routes */
705 struct in_addr originator_ip;
706
707 /* SVI associated with the L3-VNI corresponding to this vrf */
708 ifindex_t l3vni_svi_ifindex;
709
710 /* RB tree of ES-VRFs */
711 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
712
713 /* Hash table of EVPN nexthops maintained per-tenant-VRF */
714 struct hash *evpn_nh_table;
715
716 /*
717 * Flag resolve_overlay_index is used for recursive resolution
718 * procedures for EVPN type-5 route's gateway IP overlay index.
719 * When this flag is set, we build remote-ip-hash for
720 * all L2VNIs and resolve overlay index nexthops using this hash.
721 * Overlay index nexthops remain unresolved if this flag is not set.
722 */
723 bool resolve_overlay_index;
724
725 /* vrf flags */
726 uint32_t vrf_flags;
727 #define BGP_VRF_AUTO (1 << 0)
728 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
729 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
730 #define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
731 #define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
732 #define BGP_VRF_RD_CFGD (1 << 5)
733 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
734 /* per-VRF toVPN SID */
735 #define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
736
737 /* unique ID for auto derivation of RD for this vrf */
738 uint16_t vrf_rd_id;
739
740 /* Automatically derived RD for this VRF */
741 struct prefix_rd vrf_prd_auto;
742
743 /* RD for this VRF */
744 struct prefix_rd vrf_prd;
745 char *vrf_prd_pretty;
746
747 /* import rt list for the vrf instance */
748 struct list *vrf_import_rtl;
749
750 /* export rt list for the vrf instance */
751 struct list *vrf_export_rtl;
752
753 /* list of corresponding l2vnis (struct bgpevpn) */
754 struct list *l2vnis;
755
756 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
757 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
758
759 struct vpn_policy vpn_policy[AFI_MAX];
760
761 struct bgp_pbr_config *bgp_pbr_cfg;
762
763 /* Count of peers in established state */
764 uint32_t established_peers;
765
766 /* Weighted ECMP related config. */
767 enum bgp_link_bw_handling lb_handling;
768
769 /* Process Queue for handling routes */
770 struct work_queue *process_queue;
771
772 bool fast_convergence;
773
774 /* BGP Conditional advertisement */
775 uint32_t condition_check_period;
776 uint32_t condition_filter_count;
777 struct event *t_condition_check;
778
779 /* BGP VPN SRv6 backend */
780 bool srv6_enabled;
781 char srv6_locator_name[SRV6_LOCNAME_SIZE];
782 struct list *srv6_locator_chunks;
783 struct list *srv6_functions;
784 uint32_t tovpn_sid_index; /* unset => set to 0 */
785 struct in6_addr *tovpn_sid;
786 struct srv6_locator_chunk *tovpn_sid_locator;
787 uint32_t tovpn_sid_transpose_label;
788 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
789
790 /* TCP keepalive parameters for BGP connection */
791 uint16_t tcp_keepalive_idle;
792 uint16_t tcp_keepalive_intvl;
793 uint16_t tcp_keepalive_probes;
794
795 struct timeval ebgprequirespolicywarning;
796 #define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
797
798 bool allow_martian;
799
800 enum asnotation_mode asnotation;
801
802 QOBJ_FIELDS;
803 };
804 DECLARE_QOBJ_TYPE(bgp);
805
806 struct bgp_interface {
807 #define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
808 uint32_t flags;
809 };
810
811 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
812 DECLARE_HOOK(bgp_inst_config_write,
813 (struct bgp *bgp, struct vty *vty),
814 (bgp, vty));
815 DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
816
817 /* Thread callback information */
818 struct afi_safi_info {
819 afi_t afi;
820 safi_t safi;
821 struct bgp *bgp;
822 };
823
824 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
825
826 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
827 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
828 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
829 && bgp->vrf_id != VRF_UNKNOWN))
830
831 #define BGP_SELECT_DEFER_DISABLE(bgp) \
832 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
833
834 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
835 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
836 || bm->wait_for_fib)
837
838 /* BGP peer-group support. */
839 struct peer_group {
840 /* Name of the peer-group. */
841 char *name;
842
843 /* Pointer to BGP. */
844 struct bgp *bgp;
845
846 /* Peer-group client list. */
847 struct list *peer;
848
849 /** Dynamic neighbor listening ranges */
850 struct list *listen_range[AFI_MAX];
851
852 /* Peer-group config */
853 struct peer *conf;
854 };
855
856 /* BGP Notify message format. */
857 struct bgp_notify {
858 uint8_t code;
859 uint8_t subcode;
860 char *data;
861 bgp_size_t length;
862 uint8_t *raw_data;
863 bool hard_reset;
864 };
865
866 /* Next hop self address. */
867 struct bgp_nexthop {
868 struct interface *ifp;
869 struct in_addr v4;
870 struct in6_addr v6_global;
871 struct in6_addr v6_local;
872 };
873
874 /* BGP addpath values */
875 #define BGP_ADDPATH_RX 1
876 #define BGP_ADDPATH_TX 2
877 #define BGP_ADDPATH_ID_LEN 4
878
879 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
880
881 /* Route map direction */
882 #define RMAP_IN 0
883 #define RMAP_OUT 1
884 #define RMAP_MAX 2
885
886 #define BGP_DEFAULT_TTL 1
887 #define BGP_GTSM_HOPS_DISABLED 0
888 #define BGP_GTSM_HOPS_CONNECTED 1
889
890 /* Advertise map */
891 #define CONDITION_NON_EXIST false
892 #define CONDITION_EXIST true
893
894 enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
895
896 #include "filter.h"
897
898 /* BGP filter structure. */
899 struct bgp_filter {
900 /* Distribute-list. */
901 struct {
902 char *name;
903 struct access_list *alist;
904 } dlist[FILTER_MAX];
905
906 /* Prefix-list. */
907 struct {
908 char *name;
909 struct prefix_list *plist;
910 } plist[FILTER_MAX];
911
912 /* Filter-list. */
913 struct {
914 char *name;
915 struct as_list *aslist;
916 } aslist[FILTER_MAX];
917
918 /* Route-map. */
919 struct {
920 char *name;
921 struct route_map *map;
922 } map[RMAP_MAX];
923
924 /* Unsuppress-map. */
925 struct {
926 char *name;
927 struct route_map *map;
928 } usmap;
929
930 /* Advertise-map */
931 struct {
932 char *aname;
933 struct route_map *amap;
934
935 bool condition;
936
937 char *cname;
938 struct route_map *cmap;
939
940 enum update_type update_type;
941 } advmap;
942 };
943
944 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
945 a peer who's AS is part of our Confederation. */
946 enum bgp_peer_sort {
947 BGP_PEER_UNSPECIFIED,
948 BGP_PEER_IBGP,
949 BGP_PEER_EBGP,
950 BGP_PEER_INTERNAL,
951 BGP_PEER_CONFED,
952 };
953
954 /* BGP message header and packet size. */
955 #define BGP_MARKER_SIZE 16
956 #define BGP_HEADER_SIZE 19
957 #define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
958 #define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
959 #define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
960 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
961
962 /*
963 * Trigger delay for bgp_announce_route().
964 */
965 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
966 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
967
968 struct peer_af {
969 /* back pointer to the peer */
970 struct peer *peer;
971
972 /* which subgroup the peer_af belongs to */
973 struct update_subgroup *subgroup;
974
975 /* for being part of an update subgroup's peer list */
976 LIST_ENTRY(peer_af) subgrp_train;
977
978 /* for being part of a packet's peer list */
979 LIST_ENTRY(peer_af) pkt_train;
980
981 struct bpacket *next_pkt_to_send;
982
983 /*
984 * Trigger timer for bgp_announce_route().
985 */
986 struct event *t_announce_route;
987
988 afi_t afi;
989 safi_t safi;
990 int afid;
991 };
992 /* BGP GR per peer ds */
993
994 #define BGP_PEER_GR_MODE 5
995 #define BGP_PEER_GR_EVENT_CMD 6
996
997 enum peer_mode {
998 PEER_HELPER = 0,
999 PEER_GR,
1000 PEER_DISABLE,
1001 PEER_INVALID,
1002 PEER_GLOBAL_INHERIT /* This is the default mode */
1003
1004 };
1005
1006 enum peer_gr_command {
1007 PEER_GR_CMD = 0,
1008 NO_PEER_GR_CMD,
1009 PEER_DISABLE_CMD,
1010 NO_PEER_DISABLE_CMD,
1011 PEER_HELPER_CMD,
1012 NO_PEER_HELPER_CMD
1013 };
1014
1015 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
1016
1017 struct bgp_peer_gr {
1018 enum peer_mode next_state;
1019 bgp_peer_gr_action_ptr action_fun;
1020 };
1021
1022 /*
1023 * BGP FSM event codes, per RFC 4271 ss. 8.1
1024 */
1025 enum bgp_fsm_rfc_codes {
1026 BGP_FSM_ManualStart = 1,
1027 BGP_FSM_ManualStop = 2,
1028 BGP_FSM_AutomaticStart = 3,
1029 BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
1030 BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
1031 BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
1032 BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
1033 7,
1034 BGP_FSM_AutomaticStop = 8,
1035 BGP_FSM_ConnectRetryTimer_Expires = 9,
1036 BGP_FSM_HoldTimer_Expires = 10,
1037 BGP_FSM_KeepaliveTimer_Expires = 11,
1038 BGP_FSM_DelayOpenTimer_Expires = 12,
1039 BGP_FSM_IdleHoldTimer_Expires = 13,
1040 BGP_FSM_TcpConnection_Valid = 14,
1041 BGP_FSM_Tcp_CR_Invalid = 15,
1042 BGP_FSM_Tcp_CR_Acked = 16,
1043 BGP_FSM_TcpConnectionConfirmed = 17,
1044 BGP_FSM_TcpConnectionFails = 18,
1045 BGP_FSM_BGPOpen = 19,
1046 BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
1047 BGP_FSM_BGPHeaderErr = 21,
1048 BGP_FSM_BGPOpenMsgErr = 22,
1049 BGP_FSM_OpenCollisionDump = 23,
1050 BGP_FSM_NotifMsgVerErr = 24,
1051 BGP_FSM_NotifMsg = 25,
1052 BGP_FSM_KeepAliveMsg = 26,
1053 BGP_FSM_UpdateMsg = 27,
1054 BGP_FSM_UpdateMsgErr = 28
1055 };
1056
1057 /*
1058 * BGP finite state machine events
1059 *
1060 * Note: these do not correspond to RFC-defined event codes. Those are
1061 * defined elsewhere.
1062 */
1063 enum bgp_fsm_events {
1064 BGP_Start = 1,
1065 BGP_Stop,
1066 TCP_connection_open,
1067 TCP_connection_open_w_delay,
1068 TCP_connection_closed,
1069 TCP_connection_open_failed,
1070 TCP_fatal_error,
1071 ConnectRetry_timer_expired,
1072 Hold_Timer_expired,
1073 KeepAlive_timer_expired,
1074 DelayOpen_timer_expired,
1075 Receive_OPEN_message,
1076 Receive_KEEPALIVE_message,
1077 Receive_UPDATE_message,
1078 Receive_NOTIFICATION_message,
1079 Clearing_Completed,
1080 BGP_EVENTS_MAX,
1081 };
1082
1083 /* BGP finite state machine status. */
1084 enum bgp_fsm_status {
1085 Idle = 1,
1086 Connect,
1087 Active,
1088 OpenSent,
1089 OpenConfirm,
1090 Established,
1091 Clearing,
1092 Deleted,
1093 BGP_STATUS_MAX,
1094 };
1095
1096 #define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
1097
1098 struct llgr_info {
1099 uint32_t stale_time;
1100 uint8_t flags;
1101 };
1102
1103 /* BGP neighbor structure. */
1104 struct peer {
1105 /* BGP structure. */
1106 struct bgp *bgp;
1107
1108 /* reference count, primarily to allow bgp_process'ing of route_node's
1109 * to be done after a struct peer is deleted.
1110 *
1111 * named 'lock' for hysterical reasons within Quagga.
1112 */
1113 int lock;
1114
1115 /* BGP peer group. */
1116 struct peer_group *group;
1117 uint64_t version[AFI_MAX][SAFI_MAX];
1118
1119 /* BGP peer_af structures, per configured AF on this peer */
1120 struct peer_af *peer_af_array[BGP_AF_MAX];
1121
1122 /* Peer's remote AS number. */
1123 int as_type;
1124 as_t as;
1125 /* for vty as format */
1126 char *as_pretty;
1127
1128 /* Peer's local AS number. */
1129 as_t local_as;
1130
1131 enum bgp_peer_sort sort;
1132
1133 /* Peer's Change local AS number. */
1134 as_t change_local_as;
1135 /* for vty as format */
1136 char *change_local_as_pretty;
1137
1138 /* Remote router ID. */
1139 struct in_addr remote_id;
1140
1141 /* Local router ID. */
1142 struct in_addr local_id;
1143
1144 /* Packet receive and send buffer. */
1145 pthread_mutex_t io_mtx; // guards ibuf, obuf
1146 struct stream_fifo *ibuf; // packets waiting to be processed
1147 struct stream_fifo *obuf; // packets waiting to be written
1148
1149 /* used as a block to deposit raw wire data to */
1150 uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
1151 * BGP_READ_PACKET_MAX];
1152 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
1153 struct stream *obuf_work; // WiP buffer used to construct packets
1154
1155 struct stream *curr; // the current packet being parsed
1156
1157 /* We use a separate stream to encode MP_REACH_NLRI for efficient
1158 * NLRI packing. peer->obuf_work stores all the other attributes. The
1159 * actual packet is then constructed by concatenating the two.
1160 */
1161 struct stream *scratch;
1162
1163 /* the doppelganger peer structure, due to dual TCP conn setup */
1164 struct peer *doppelganger;
1165
1166 /* Status of the peer. */
1167 enum bgp_fsm_status status;
1168 enum bgp_fsm_status ostatus;
1169
1170 /* FSM events, stored for debug purposes.
1171 * Note: uchar used for reduced memory usage.
1172 */
1173 enum bgp_fsm_events cur_event;
1174 enum bgp_fsm_events last_event;
1175 enum bgp_fsm_events last_major_event;
1176
1177 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1178 uint16_t table_dump_index;
1179
1180 /* Peer information */
1181 int fd; /* File descriptor */
1182 int ttl; /* TTL of TCP connection to the peer. */
1183 int rtt; /* Estimated round-trip-time from TCP_INFO */
1184 int rtt_expected; /* Expected round-trip-time for a peer */
1185 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1186 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1187 int gtsm_hops; /* minimum hopcount to peer */
1188 char *desc; /* Description of the peer. */
1189 unsigned short port; /* Destination port for peer */
1190 char *host; /* Printable address of the peer. */
1191 union sockunion su; /* Sockunion address of the peer. */
1192 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1193 time_t uptime; /* Last Up/Down time */
1194 time_t readtime; /* Last read time */
1195 time_t resettime; /* Last reset time */
1196
1197 char *conf_if; /* neighbor interface config name. */
1198 struct interface *ifp; /* corresponding interface */
1199 char *ifname; /* bind interface name. */
1200 char *update_if;
1201 union sockunion *update_source;
1202
1203 union sockunion *su_local; /* Sockunion of local address. */
1204 union sockunion *su_remote; /* Sockunion of remote address. */
1205 int shared_network; /* Is this peer shared same network. */
1206 struct bgp_nexthop nexthop; /* Nexthop */
1207
1208 /* Roles in bgp session */
1209 uint8_t local_role;
1210 uint8_t remote_role;
1211 #define ROLE_PROVIDER 0
1212 #define ROLE_RS_SERVER 1
1213 #define ROLE_RS_CLIENT 2
1214 #define ROLE_CUSTOMER 3
1215 #define ROLE_PEER 4
1216 #define ROLE_UNDEFINED 255
1217
1218 #define ROLE_NAME_MAX_LEN 20
1219
1220 /* Peer address family configuration. */
1221 uint8_t afc[AFI_MAX][SAFI_MAX];
1222 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1223 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1224 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1225
1226 /* Capability flags (reset in bgp_stop) */
1227 uint32_t cap;
1228 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1229 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1230 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1231 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1232 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1233 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1234 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1235 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1236 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1237 /* sent graceful-restart restart (R) bit */
1238 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
1239 /* received graceful-restart restart (R) bit */
1240 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
1241 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1242 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1243 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1244 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1245 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1246 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1247 #define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
1248 #define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
1249 #define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
1250 #define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
1251 #define PEER_CAP_LLGR_ADV (1U << 21)
1252 #define PEER_CAP_LLGR_RCV (1U << 22)
1253 /* sent graceful-restart notification (N) bit */
1254 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
1255 /* received graceful-restart notification (N) bit */
1256 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
1257 #define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
1258 #define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
1259 #define PEER_CAP_SOFT_VERSION_ADV (1U << 27)
1260 #define PEER_CAP_SOFT_VERSION_RCV (1U << 28)
1261
1262 /* Capability flags (reset in bgp_stop) */
1263 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1264 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1265 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1266 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1267 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1268 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1269 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1270 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1271 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1272 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1273 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1274 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1275 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1276 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1277 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1278 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1279 #define PEER_CAP_LLGR_AF_ADV (1U << 15)
1280 #define PEER_CAP_LLGR_AF_RCV (1U << 16)
1281
1282 /* Global configuration flags. */
1283 /*
1284 * Parallel array to flags that indicates whether each flag originates
1285 * from a peer-group or if it is config that is specific to this
1286 * individual peer. If a flag is set independent of the peer-group, the
1287 * same bit should be set here. If this peer is a peer-group, this
1288 * memory region should be all zeros.
1289 *
1290 * The assumption is that the default state for all flags is unset,
1291 * so if a flag is unset, the corresponding override flag is unset too.
1292 * However if a flag is set, the corresponding override flag is set.
1293 */
1294 uint64_t flags_override;
1295 /*
1296 * Parallel array to flags that indicates whether the default behavior
1297 * of *flags_override* should be inverted. If a flag is unset and the
1298 * corresponding invert flag is set, the corresponding override flag
1299 * would be set. However if a flag is set and the corresponding invert
1300 * flag is unset, the corresponding override flag would be unset.
1301 *
1302 * This can be used for attributes like *send-community*, which are
1303 * implicitely enabled and have to be disabled explicitely, compared to
1304 * 'normal' attributes like *next-hop-self* which are implicitely set.
1305 *
1306 * All operations dealing with flags should apply the following boolean
1307 * logic to keep the internal flag system in a sane state:
1308 *
1309 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1310 * value=0 invert=1 Unset flag unconditionally
1311 * value=1 invert=0 Set flag unconditionally
1312 * value=1 invert=1 Inherit flag if member, otherwise set flag
1313 *
1314 * Contrary to the implementation of *flags_override*, the flag
1315 * inversion state can be set either on the peer OR the peer *and* the
1316 * peer-group. This was done on purpose, as the inversion state of a
1317 * flag can be determined on either the peer or the peer-group.
1318 *
1319 * Example: Enabling the cisco configuration mode inverts all flags
1320 * related to *send-community* unconditionally for both peer-groups and
1321 * peers.
1322 *
1323 * This behavior is different for interface peers though, which enable
1324 * the *extended-nexthop* flag by default, which regular peers do not.
1325 * As the peer-group can contain both regular and interface peers, the
1326 * flag inversion state must be set on the peer only.
1327 *
1328 * When a peer inherits the configuration from a peer-group and the
1329 * inversion state of the flag differs between peer and peer-group, the
1330 * newly set value must equal to the inverted state of the peer-group.
1331 */
1332 uint64_t flags_invert;
1333 /*
1334 * Effective array for storing the peer/peer-group flags. In case of a
1335 * peer-group, the peer-specific overrides (see flags_override and
1336 * flags_invert) must be respected.
1337 * When changing the structure of flags/af_flags, do not forget to
1338 * change flags_invert/flags_override too.
1339 */
1340 uint64_t flags;
1341 #define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
1342 #define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
1343 #define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
1344 #define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
1345 #define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
1346 #define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
1347 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
1348 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
1349 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
1350 #define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
1351 #define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
1352 #define PEER_FLAG_LONESOUL (1ULL << 11)
1353 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
1354 #define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
1355 #define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
1356 #define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
1357 #define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
1358 #define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
1359 #define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
1360 #define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
1361 #define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
1362 #define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
1363 #define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
1364
1365 /* BGP-GR Peer related flags */
1366 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
1367 #define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
1368 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
1369 #define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
1370 #define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
1371 #define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
1372 /* Disable IEEE floating-point link bandwidth encoding in
1373 * extended communities.
1374 */
1375 #define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
1376 /* force the extended format for Optional Parameters in OPEN message */
1377 #define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
1378
1379 /* BGP Open Policy flags.
1380 * Enforce using roles on both sides:
1381 * `local-role ROLE strict-mode` configured.
1382 */
1383 #define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
1384 /* `local-role` configured */
1385 #define PEER_FLAG_ROLE (1ULL << 32)
1386 #define PEER_FLAG_PORT (1ULL << 33)
1387 #define PEER_FLAG_AIGP (1ULL << 34)
1388 #define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
1389 #define PEER_FLAG_CAPABILITY_SOFT_VERSION (1ULL << 36)
1390
1391 /*
1392 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1393 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1394 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1395 */
1396
1397 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1398 enum peer_mode peer_gr_present_state;
1399 /* Non stop forwarding afi-safi count for BGP gr feature*/
1400 uint8_t nsf_af_count;
1401
1402 uint8_t peer_gr_new_status_flag;
1403 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1404 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1405 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1406
1407 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1408 char *tx_shutdown_message;
1409
1410 /* NSF mode (graceful restart) */
1411 uint8_t nsf[AFI_MAX][SAFI_MAX];
1412 /* EOR Send time */
1413 time_t eor_stime[AFI_MAX][SAFI_MAX];
1414 /* Last update packet sent time */
1415 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1416
1417 /* Peer Per AF flags */
1418 /*
1419 * Please consult the comments for *flags_override*, *flags_invert* and
1420 * *flags* to understand what these three arrays do. The address-family
1421 * specific attributes are being treated the exact same way as global
1422 * peer attributes.
1423 */
1424 uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
1425 uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
1426 uint64_t af_flags[AFI_MAX][SAFI_MAX];
1427 #define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
1428 #define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
1429 #define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
1430 #define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
1431 #define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
1432 #define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
1433 #define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
1434 #define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
1435 #define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
1436 #define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
1437 #define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
1438 #define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
1439 #define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
1440 #define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
1441 #define PEER_FLAG_MAX_PREFIX (1ULL << 14)
1442 #define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
1443 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
1444 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
1445 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
1446 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
1447 #define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
1448 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
1449 #define PEER_FLAG_WEIGHT (1ULL << 22)
1450 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 23)
1451 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 24)
1452 #define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 25)
1453 #define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 26)
1454 #define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 27)
1455 #define PEER_FLAG_SOO (1ULL << 28)
1456 #define PEER_FLAG_ACCEPT_OWN (1ULL << 63)
1457
1458 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1459
1460 /* MD5 password */
1461 char *password;
1462
1463 /* default-originate route-map. */
1464 struct {
1465 char *name;
1466 struct route_map *map;
1467 } default_rmap[AFI_MAX][SAFI_MAX];
1468
1469 /* Peer status flags. */
1470 uint16_t sflags;
1471 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1472 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1473 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1474 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1475 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1476 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1477 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1478 /* received extended format encoding for OPEN message */
1479 #define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
1480
1481 /* Peer status af flags (reset in bgp_stop) */
1482 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1483 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1484 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1485 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1486 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1487 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1488 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1489 #define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
1490 #define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
1491 #define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
1492 #define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
1493 #define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
1494 /* LLGR aware peer */
1495 #define PEER_STATUS_LLGR_WAIT (1U << 11)
1496 #define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
1497 #define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
1498
1499 /* Configured timer values. */
1500 _Atomic uint32_t holdtime;
1501 _Atomic uint32_t keepalive;
1502 _Atomic uint32_t connect;
1503 _Atomic uint32_t routeadv;
1504 _Atomic uint32_t delayopen;
1505
1506 /* Timer values. */
1507 _Atomic uint32_t v_start;
1508 _Atomic uint32_t v_connect;
1509 _Atomic uint32_t v_holdtime;
1510 _Atomic uint32_t v_keepalive;
1511 _Atomic uint32_t v_routeadv;
1512 _Atomic uint32_t v_delayopen;
1513 _Atomic uint32_t v_pmax_restart;
1514 _Atomic uint32_t v_gr_restart;
1515
1516 /* Threads. */
1517 struct event *t_read;
1518 struct event *t_write;
1519 struct event *t_start;
1520 struct event *t_connect_check_r;
1521 struct event *t_connect_check_w;
1522 struct event *t_connect;
1523 struct event *t_holdtime;
1524 struct event *t_routeadv;
1525 struct event *t_delayopen;
1526 struct event *t_pmax_restart;
1527 struct event *t_gr_restart;
1528 struct event *t_gr_stale;
1529 struct event *t_llgr_stale[AFI_MAX][SAFI_MAX];
1530 struct event *t_revalidate_all[AFI_MAX][SAFI_MAX];
1531 struct event *t_generate_updgrp_packets;
1532 struct event *t_process_packet;
1533 struct event *t_process_packet_error;
1534 struct event *t_refresh_stalepath;
1535
1536 /* Thread flags. */
1537 _Atomic uint32_t thread_flags;
1538 #define PEER_THREAD_WRITES_ON (1U << 0)
1539 #define PEER_THREAD_READS_ON (1U << 1)
1540 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1541 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1542
1543 /* workqueues */
1544 struct work_queue *clear_node_queue;
1545
1546 #define PEER_TOTAL_RX(peer) \
1547 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1548 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1549 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1550 + atomic_load_explicit(&peer->refresh_in, \
1551 memory_order_relaxed) \
1552 + atomic_load_explicit(&peer->keepalive_in, \
1553 memory_order_relaxed) \
1554 + atomic_load_explicit(&peer->dynamic_cap_in, \
1555 memory_order_relaxed)
1556
1557 #define PEER_TOTAL_TX(peer) \
1558 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1559 + atomic_load_explicit(&peer->update_out, \
1560 memory_order_relaxed) \
1561 + atomic_load_explicit(&peer->notify_out, \
1562 memory_order_relaxed) \
1563 + atomic_load_explicit(&peer->refresh_out, \
1564 memory_order_relaxed) \
1565 + atomic_load_explicit(&peer->keepalive_out, \
1566 memory_order_relaxed) \
1567 + atomic_load_explicit(&peer->dynamic_cap_out, \
1568 memory_order_relaxed)
1569
1570 /* Statistics field */
1571 _Atomic uint32_t open_in; /* Open message input count */
1572 _Atomic uint32_t open_out; /* Open message output count */
1573 _Atomic uint32_t update_in; /* Update message input count */
1574 _Atomic uint32_t update_out; /* Update message ouput count */
1575 _Atomic time_t update_time; /* Update message received time. */
1576 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1577 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1578 _Atomic uint32_t notify_in; /* Notify input count */
1579 _Atomic uint32_t notify_out; /* Notify output count */
1580 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1581 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1582 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1583 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1584
1585 uint32_t stat_pfx_filter;
1586 uint32_t stat_pfx_aspath_loop;
1587 uint32_t stat_pfx_originator_loop;
1588 uint32_t stat_pfx_cluster_loop;
1589 uint32_t stat_pfx_nh_invalid;
1590 uint32_t stat_pfx_dup_withdraw;
1591 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1592
1593 /* BGP state count */
1594 uint32_t established; /* Established */
1595 uint32_t dropped; /* Dropped */
1596
1597 /* Update delay related fields */
1598 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1599 for EOR */
1600
1601 /* Syncronization list and time. */
1602 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1603 time_t synctime;
1604 /* timestamp when the last UPDATE msg was written */
1605 _Atomic time_t last_write;
1606 /* timestamp when the last msg was written */
1607 _Atomic time_t last_update;
1608
1609 /* only updated under io_mtx.
1610 * last_sendq_warn is only for ratelimiting log warning messages.
1611 */
1612 time_t last_sendq_ok, last_sendq_warn;
1613
1614 /* Notify data. */
1615 struct bgp_notify notify;
1616
1617 /* Filter structure. */
1618 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1619
1620 /*
1621 * Parallel array to filter that indicates whether each filter
1622 * originates from a peer-group or if it is config that is specific to
1623 * this individual peer. If a filter is set independent of the
1624 * peer-group the appropriate bit should be set here. If this peer is a
1625 * peer-group, this memory region should be all zeros. The assumption
1626 * is that the default state for all flags is unset. Due to filters
1627 * having a direction (e.g. in/out/...), this array has a third
1628 * dimension for storing the overrides independently per direction.
1629 *
1630 * Notes:
1631 * - if a filter for an individual peer is unset, the corresponding
1632 * override flag is unset and the peer is considered to be back in
1633 * sync with the peer-group.
1634 * - This does *not* contain the filter values, rather it contains
1635 * whether the filter in filter (struct bgp_filter) is peer-specific.
1636 */
1637 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1638 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1639 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1640 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1641 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1642 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1643 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1644
1645 /* ORF Prefix-list */
1646 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1647
1648 /* Text description of last attribute rcvd */
1649 char rcvd_attr_str[BUFSIZ];
1650
1651 /* Track if we printed the attribute in debugs */
1652 int rcvd_attr_printed;
1653
1654 /* Accepted prefix count */
1655 uint32_t pcount[AFI_MAX][SAFI_MAX];
1656
1657 /* Max prefix count. */
1658 uint32_t pmax[AFI_MAX][SAFI_MAX];
1659 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1660 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1661 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1662
1663 /* Send prefix count. */
1664 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1665
1666 /* allowas-in. */
1667 char allowas_in[AFI_MAX][SAFI_MAX];
1668
1669 /* soo */
1670 struct ecommunity *soo[AFI_MAX][SAFI_MAX];
1671
1672 /* weight */
1673 unsigned long weight[AFI_MAX][SAFI_MAX];
1674
1675 /* peer reset cause */
1676 uint8_t last_reset;
1677 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1678 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1679 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1680 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1681 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1682 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1683 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1684 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1685 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1686 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1687 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1688 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1689 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1690 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1691 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1692 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1693 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1694 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1695 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1696 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1697 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1698 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1699 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1700 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1701 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1702 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1703 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1704 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1705 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1706 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1707 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1708 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1709 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1710 #define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
1711 #define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
1712 /*
1713 * Remember to update peer_down_str in bgp_fsm.c when you add
1714 * a new value to the last_reset reason
1715 */
1716
1717 uint16_t last_reset_cause_size;
1718 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1719
1720 /* The kind of route-map Flags.*/
1721 uint16_t rmap_type;
1722 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1723 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1724 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1725 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1726 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1727 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1728 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1729 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1730 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1731
1732 /** Peer overwrite configuration. */
1733 struct bfd_session_config {
1734 /**
1735 * Manual configuration bit.
1736 *
1737 * This flag only makes sense for real peers (and not groups),
1738 * it keeps track if the user explicitly configured BFD for a
1739 * peer.
1740 */
1741 bool manual;
1742 /** Control Plane Independent. */
1743 bool cbit;
1744 /** Detection multiplier. */
1745 uint8_t detection_multiplier;
1746 /** Minimum required RX interval. */
1747 uint32_t min_rx;
1748 /** Minimum required TX interval. */
1749 uint32_t min_tx;
1750 /** Profile name. */
1751 char profile[BFD_PROFILE_NAME_LEN];
1752 /** Peer BFD session */
1753 struct bfd_session_params *session;
1754 } * bfd_config;
1755
1756 /* hostname and domainname advertised by host */
1757 char *hostname;
1758 char *domainname;
1759
1760 /* Sender side AS path loop detection. */
1761 bool as_path_loop_detection;
1762
1763 /* Extended Message Support */
1764 uint16_t max_packet_size;
1765
1766 /* Conditional advertisement */
1767 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1768 bool advmap_table_change;
1769
1770 /* set TCP max segment size */
1771 uint32_t tcp_mss;
1772
1773 /* Long-lived Graceful Restart */
1774 struct llgr_info llgr[AFI_MAX][SAFI_MAX];
1775
1776 bool shut_during_cfg;
1777
1778 #define BGP_ATTR_MAX 255
1779 /* Path attributes discard */
1780 bool discard_attrs[BGP_ATTR_MAX];
1781
1782 /* Path attributes treat-as-withdraw */
1783 bool withdraw_attrs[BGP_ATTR_MAX];
1784
1785 /* BGP Software Version Capability */
1786 #define BGP_MAX_SOFT_VERSION 64
1787 char *soft_version;
1788
1789 QOBJ_FIELDS;
1790 };
1791 DECLARE_QOBJ_TYPE(peer);
1792
1793 /* Inherit peer attribute from peer-group. */
1794 #define PEER_ATTR_INHERIT(peer, group, attr) \
1795 ((peer)->attr = (group)->conf->attr)
1796 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1797 do { \
1798 XFREE(mt, (peer)->attr); \
1799 if ((group)->conf->attr) \
1800 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1801 else \
1802 (peer)->attr = NULL; \
1803 } while (0)
1804 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1805 do { \
1806 if ((peer)->attr) \
1807 sockunion_free((peer)->attr); \
1808 if ((group)->conf->attr) \
1809 (peer)->attr = sockunion_dup((group)->conf->attr); \
1810 else \
1811 (peer)->attr = NULL; \
1812 } while (0)
1813
1814 /* Check if suppress start/restart of sessions to peer. */
1815 #define BGP_PEER_START_SUPPRESSED(P) \
1816 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
1817 CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
1818 CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
1819 (P)->shut_during_cfg)
1820
1821 #define PEER_ROUTE_ADV_DELAY(peer) \
1822 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1823
1824 #define PEER_PASSWORD_MINLEN (1)
1825 #define PEER_PASSWORD_MAXLEN (80)
1826
1827 /* This structure's member directly points incoming packet data
1828 stream. */
1829 struct bgp_nlri {
1830 /* AFI. */
1831 uint16_t afi; /* iana_afi_t */
1832
1833 /* SAFI. */
1834 uint8_t safi; /* iana_safi_t */
1835
1836 /* Pointer to NLRI byte stream. */
1837 uint8_t *nlri;
1838
1839 /* Length of whole NLRI. */
1840 bgp_size_t length;
1841 };
1842
1843 /* BGP versions. */
1844 #define BGP_VERSION_4 4
1845
1846 /* Default BGP port number. */
1847 #define BGP_PORT_DEFAULT 179
1848
1849 /* Extended BGP Administrative Shutdown Communication */
1850 #define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
1851
1852 /* BGP minimum message size. */
1853 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1854 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1855 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1856 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1857 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1858 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1859
1860 /* BGP message types. */
1861 #define BGP_MSG_OPEN 1
1862 #define BGP_MSG_UPDATE 2
1863 #define BGP_MSG_NOTIFY 3
1864 #define BGP_MSG_KEEPALIVE 4
1865 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1866 #define BGP_MSG_CAPABILITY 6
1867 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1868
1869 /* BGP open optional parameter. */
1870 #define BGP_OPEN_OPT_CAP 2
1871
1872 /* BGP4 attribute type codes. */
1873 #define BGP_ATTR_ORIGIN 1
1874 #define BGP_ATTR_AS_PATH 2
1875 #define BGP_ATTR_NEXT_HOP 3
1876 #define BGP_ATTR_MULTI_EXIT_DISC 4
1877 #define BGP_ATTR_LOCAL_PREF 5
1878 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1879 #define BGP_ATTR_AGGREGATOR 7
1880 #define BGP_ATTR_COMMUNITIES 8
1881 #define BGP_ATTR_ORIGINATOR_ID 9
1882 #define BGP_ATTR_CLUSTER_LIST 10
1883 #define BGP_ATTR_MP_REACH_NLRI 14
1884 #define BGP_ATTR_MP_UNREACH_NLRI 15
1885 #define BGP_ATTR_EXT_COMMUNITIES 16
1886 #define BGP_ATTR_AS4_PATH 17
1887 #define BGP_ATTR_AS4_AGGREGATOR 18
1888 #define BGP_ATTR_PMSI_TUNNEL 22
1889 #define BGP_ATTR_ENCAP 23
1890 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1891 #define BGP_ATTR_AIGP 26
1892 #define BGP_ATTR_LARGE_COMMUNITIES 32
1893 #define BGP_ATTR_OTC 35
1894 #define BGP_ATTR_PREFIX_SID 40
1895 #define BGP_ATTR_SRTE_COLOR 51
1896 #ifdef ENABLE_BGP_VNC_ATTR
1897 #define BGP_ATTR_VNC 255
1898 #endif
1899
1900 /* BGP update origin. */
1901 #define BGP_ORIGIN_IGP 0
1902 #define BGP_ORIGIN_EGP 1
1903 #define BGP_ORIGIN_INCOMPLETE 2
1904 #define BGP_ORIGIN_UNSPECIFIED 255
1905
1906 /* BGP notify message codes. */
1907 #define BGP_NOTIFY_HEADER_ERR 1
1908 #define BGP_NOTIFY_OPEN_ERR 2
1909 #define BGP_NOTIFY_UPDATE_ERR 3
1910 #define BGP_NOTIFY_HOLD_ERR 4
1911 #define BGP_NOTIFY_FSM_ERR 5
1912 #define BGP_NOTIFY_CEASE 6
1913 #define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
1914
1915 /* Subcodes for BGP Finite State Machine Error */
1916 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1917 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1918 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1919 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1920
1921 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1922
1923 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1924 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1925 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1926 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1927
1928 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1929 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1930 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1931 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1932 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1933 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1934 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1935 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1936 #define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
1937
1938 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1939 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1940 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1941 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1942 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1943 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1944 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1945 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1946 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1947 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1948 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1949
1950 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1951 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1952 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1953 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1954 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1955 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1956 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1957 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1958 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1959 #define BGP_NOTIFY_CEASE_HARD_RESET 9
1960 #define BGP_NOTIFY_CEASE_BFD_DOWN 10
1961
1962 /* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
1963 #define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
1964
1965 /* BGP route refresh optional subtypes. */
1966 #define BGP_ROUTE_REFRESH_NORMAL 0
1967 #define BGP_ROUTE_REFRESH_BORR 1
1968 #define BGP_ROUTE_REFRESH_EORR 2
1969
1970 /* BGP timers default value. */
1971 #define BGP_INIT_START_TIMER 1
1972 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1973 * version-/profile-specific values. The values here do not matter, they only
1974 * exist to provide a clear layering separation between core and CLI.
1975 */
1976 #define BGP_DEFAULT_HOLDTIME 180
1977 #define BGP_DEFAULT_KEEPALIVE 60
1978 #define BGP_DEFAULT_CONNECT_RETRY 120
1979
1980 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1981 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1982
1983 /* BGP RFC 4271 DelayOpenTime default value */
1984 #define BGP_DEFAULT_DELAYOPEN 120
1985
1986 /* BGP default local preference. */
1987 #define BGP_DEFAULT_LOCAL_PREF 100
1988
1989 /* BGP local-preference to send when 'bgp graceful-shutdown'
1990 * is configured */
1991 #define BGP_GSHUT_LOCAL_PREF 0
1992
1993 /* BGP default subgroup packet queue max . */
1994 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1995
1996 /* BGP graceful restart */
1997 #define BGP_DEFAULT_RESTART_TIME 120
1998 #define BGP_DEFAULT_STALEPATH_TIME 360
1999 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
2000 #define BGP_DEFAULT_RIB_STALE_TIME 500
2001 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
2002
2003 /* BGP Long-lived Graceful Restart */
2004 #define BGP_DEFAULT_LLGR_STALE_TIME 0
2005
2006 /* BGP uptime string length. */
2007 #define BGP_UPTIME_LEN 25
2008
2009 /* Default configuration settings for bgpd. */
2010 #define BGP_VTY_PORT 2605
2011 #define BGP_DEFAULT_CONFIG "bgpd.conf"
2012
2013 /* BGP Dynamic Neighbors feature */
2014 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
2015 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
2016 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
2017
2018 /* BGP AIGP */
2019 #define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
2020 #define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
2021 #define BGP_AIGP_TLV_METRIC_LEN 11
2022 #define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
2023 #define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
2024
2025 /* Flag for peer_clear_soft(). */
2026 enum bgp_clear_type {
2027 BGP_CLEAR_SOFT_NONE,
2028 BGP_CLEAR_SOFT_OUT,
2029 BGP_CLEAR_SOFT_IN,
2030 BGP_CLEAR_SOFT_BOTH,
2031 BGP_CLEAR_SOFT_IN_ORF_PREFIX,
2032 BGP_CLEAR_MESSAGE_STATS
2033 };
2034
2035 /* Macros. */
2036 #define BGP_INPUT(P) ((P)->curr)
2037 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
2038 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
2039 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
2040
2041 /* BGP error codes. */
2042 enum bgp_create_error_code {
2043 BGP_SUCCESS = 0,
2044 BGP_CREATED = 1,
2045 BGP_ERR_INVALID_VALUE = -1,
2046 BGP_ERR_INVALID_FLAG = -2,
2047 BGP_ERR_INVALID_AS = -3,
2048 BGP_ERR_PEER_GROUP_MEMBER = -4,
2049 BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
2050 BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
2051 BGP_ERR_PEER_GROUP_MISMATCH = -7,
2052 BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
2053 BGP_ERR_AS_MISMATCH = -9,
2054 BGP_ERR_PEER_FLAG_CONFLICT = -10,
2055 BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
2056 BGP_ERR_PEER_FILTER_CONFLICT = -12,
2057 BGP_ERR_NOT_INTERNAL_PEER = -13,
2058 BGP_ERR_REMOVE_PRIVATE_AS = -14,
2059 BGP_ERR_AF_UNCONFIGURED = -15,
2060 BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
2061 BGP_ERR_INSTANCE_MISMATCH = -17,
2062 BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
2063 BGP_ERR_TCPSIG_FAILED = -20,
2064 BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
2065 BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
2066 BGP_ERR_NO_INTERFACE_CONFIG = -23,
2067 BGP_ERR_AS_OVERRIDE = -25,
2068 BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
2069 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
2070 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
2071 BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
2072 BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
2073 BGP_ERR_PEER_SAFI_CONFLICT = -31,
2074
2075 /* BGP GR ERRORS */
2076 BGP_ERR_GR_INVALID_CMD = -32,
2077 BGP_ERR_GR_OPERATION_FAILED = -33,
2078 BGP_GR_NO_OPERATION = -34,
2079
2080 /*BGP Open Policy ERRORS */
2081 BGP_ERR_INVALID_ROLE_NAME = -35,
2082 BGP_ERR_INVALID_INTERNAL_ROLE = -36
2083 };
2084
2085 /*
2086 * Enumeration of different policy kinds a peer can be configured with.
2087 */
2088 enum bgp_policy_type {
2089 BGP_POLICY_ROUTE_MAP,
2090 BGP_POLICY_FILTER_LIST,
2091 BGP_POLICY_PREFIX_LIST,
2092 BGP_POLICY_DISTRIBUTE_LIST,
2093 };
2094
2095 /* peer_flag_change_type. */
2096 enum peer_change_type {
2097 peer_change_none,
2098 peer_change_reset,
2099 peer_change_reset_in,
2100 peer_change_reset_out,
2101 };
2102
2103 extern struct bgp_master *bm;
2104 extern unsigned int multipath_num;
2105
2106 /* Prototypes. */
2107 extern void bgp_terminate(void);
2108 extern void bgp_reset(void);
2109 extern void bgp_zclient_reset(void);
2110 extern struct bgp *bgp_get_default(void);
2111 extern struct bgp *bgp_lookup(as_t, const char *);
2112 extern struct bgp *bgp_lookup_by_name(const char *);
2113 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
2114 extern struct bgp *bgp_get_evpn(void);
2115 extern void bgp_set_evpn(struct bgp *bgp);
2116 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
2117 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
2118 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
2119 extern void bgp_peer_conf_if_to_su_update(struct peer *);
2120 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
2121 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
2122 extern struct peer_group *peer_group_get(struct bgp *, const char *);
2123 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
2124 union sockunion *,
2125 struct peer_group *);
2126 extern struct prefix *
2127 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
2128 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
2129 struct prefix *,
2130 struct prefix **);
2131 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
2132 union sockunion *);
2133
2134 /*
2135 * Peers are incredibly easy to memory leak
2136 * due to the various ways that they are actually used
2137 * Provide some functionality to debug locks and unlocks
2138 */
2139 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
2140 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
2141 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
2142 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
2143
2144 extern enum bgp_peer_sort peer_sort(struct peer *peer);
2145 extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
2146
2147 extern bool peer_active(struct peer *);
2148 extern bool peer_active_nego(struct peer *);
2149 extern bool peer_afc_received(struct peer *peer);
2150 extern bool peer_afc_advertised(struct peer *peer);
2151 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
2152 extern struct peer *peer_create(union sockunion *su, const char *conf_if,
2153 struct bgp *bgp, as_t local_as, as_t remote_as,
2154 int as_type, struct peer_group *group,
2155 bool config_node, const char *as_str);
2156 extern struct peer *peer_create_accept(struct bgp *);
2157 extern void peer_xfer_config(struct peer *dst, struct peer *src);
2158 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
2159 json_object *json);
2160
2161 extern int bgp_config_write(struct vty *);
2162
2163 extern void bgp_master_init(struct event_loop *master, const int buffer_size,
2164 struct list *addresses);
2165
2166 extern void bgp_init(unsigned short instance);
2167 extern void bgp_pthreads_run(void);
2168 extern void bgp_pthreads_finish(void);
2169 extern void bgp_route_map_init(void);
2170 extern void bgp_session_reset(struct peer *);
2171
2172 extern int bgp_option_set(int);
2173 extern int bgp_option_unset(int);
2174 extern int bgp_option_check(int);
2175
2176 /* set the bgp no-rib option during runtime and remove installed routes */
2177 extern void bgp_option_norib_set_runtime(void);
2178
2179 /* unset the bgp no-rib option during runtime and reset all peers */
2180 extern void bgp_option_norib_unset_runtime(void);
2181
2182 extern int bgp_get(struct bgp **bgp, as_t *as, const char *name,
2183 enum bgp_instance_type kind, const char *as_pretty,
2184 enum asnotation_mode asnotation);
2185 extern void bgp_instance_up(struct bgp *);
2186 extern void bgp_instance_down(struct bgp *);
2187 extern int bgp_delete(struct bgp *);
2188
2189 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
2190 vrf_id_t old_vrf_id, bool create);
2191
2192 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
2193 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
2194
2195 extern void bm_wait_for_fib_set(bool set);
2196 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
2197 extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
2198 extern void bgp_cluster_id_unset(struct bgp *bgp);
2199
2200 extern void bgp_confederation_id_set(struct bgp *bgp, as_t as,
2201 const char *as_str);
2202 extern void bgp_confederation_id_unset(struct bgp *bgp);
2203 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
2204
2205 extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as,
2206 const char *as_str);
2207 extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
2208
2209 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
2210 uint32_t connect_retry, uint32_t delayopen);
2211 extern void bgp_timers_unset(struct bgp *);
2212
2213 extern void bgp_default_local_preference_set(struct bgp *bgp,
2214 uint32_t local_pref);
2215 extern void bgp_default_local_preference_unset(struct bgp *bgp);
2216
2217 extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
2218 uint32_t queue_size);
2219 extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
2220
2221 extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
2222 extern void bgp_listen_limit_unset(struct bgp *bgp);
2223
2224 extern bool bgp_update_delay_active(struct bgp *);
2225 extern bool bgp_update_delay_configured(struct bgp *);
2226 extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
2227 extern void peer_as_change(struct peer *peer, as_t as, int as_type,
2228 const char *as_str);
2229 extern int peer_remote_as(struct bgp *bgp, union sockunion *su,
2230 const char *conf_if, as_t *as, int as_type,
2231 const char *as_str);
2232 extern int peer_group_remote_as(struct bgp *bgp, const char *peer_str, as_t *as,
2233 int as_type, const char *as_str);
2234 extern int peer_delete(struct peer *peer);
2235 extern void peer_notify_unconfig(struct peer *peer);
2236 extern int peer_group_delete(struct peer_group *);
2237 extern int peer_group_remote_as_delete(struct peer_group *);
2238 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
2239 extern void peer_group_notify_unconfig(struct peer_group *group);
2240
2241 extern int peer_activate(struct peer *, afi_t, safi_t);
2242 extern int peer_deactivate(struct peer *, afi_t, safi_t);
2243
2244 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
2245 struct peer_group *, as_t *);
2246
2247 extern int peer_flag_set(struct peer *peer, uint64_t flag);
2248 extern int peer_flag_unset(struct peer *peer, uint64_t flag);
2249 extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
2250
2251 extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
2252 uint64_t flag);
2253 extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
2254 uint64_t flag);
2255 extern bool peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi,
2256 uint64_t flag);
2257 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
2258 uint64_t flag);
2259 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
2260 enum peer_change_type type);
2261
2262 extern int peer_ebgp_multihop_set(struct peer *, int);
2263 extern int peer_ebgp_multihop_unset(struct peer *);
2264 extern int is_ebgp_multihop_configured(struct peer *peer);
2265
2266 extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
2267 extern int peer_role_unset(struct peer *peer);
2268
2269 extern void peer_description_set(struct peer *, const char *);
2270 extern void peer_description_unset(struct peer *);
2271
2272 extern int peer_update_source_if_set(struct peer *, const char *);
2273 extern void peer_update_source_addr_set(struct peer *peer,
2274 const union sockunion *su);
2275 extern void peer_update_source_unset(struct peer *peer);
2276
2277 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
2278 const char *rmap,
2279 struct route_map *route_map);
2280 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
2281 extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
2282 uint16_t interval, uint16_t probes);
2283 extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
2284
2285 extern void peer_port_set(struct peer *, uint16_t);
2286 extern void peer_port_unset(struct peer *);
2287
2288 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
2289 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
2290
2291 extern int peer_timers_set(struct peer *, uint32_t keepalive,
2292 uint32_t holdtime);
2293 extern int peer_timers_unset(struct peer *);
2294
2295 extern int peer_timers_connect_set(struct peer *, uint32_t);
2296 extern int peer_timers_connect_unset(struct peer *);
2297
2298 extern int peer_advertise_interval_set(struct peer *, uint32_t);
2299 extern int peer_advertise_interval_unset(struct peer *);
2300
2301 extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
2302 extern int peer_timers_delayopen_unset(struct peer *peer);
2303
2304 extern void peer_interface_set(struct peer *, const char *);
2305 extern void peer_interface_unset(struct peer *);
2306
2307 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
2308 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
2309
2310 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
2311 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
2312
2313 extern int peer_local_as_set(struct peer *peer, as_t as, bool no_prepend,
2314 bool replace_as, const char *as_str);
2315 extern int peer_local_as_unset(struct peer *);
2316
2317 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
2318 const char *);
2319 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
2320
2321 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
2322 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
2323
2324 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
2325 const char *name, struct route_map *route_map);
2326 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
2327
2328 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2329 const char *name,
2330 struct route_map *route_map);
2331
2332 extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
2333 const char *advertise_name,
2334 struct route_map *advertise_map,
2335 const char *condition_name,
2336 struct route_map *condition_map,
2337 bool condition);
2338
2339 extern int peer_password_set(struct peer *, const char *);
2340 extern int peer_password_unset(struct peer *);
2341
2342 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2343
2344 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2345 const char *advertise_name,
2346 struct route_map *advertise_map,
2347 const char *condition_name,
2348 struct route_map *condition_map,
2349 bool condition);
2350
2351 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2352 uint8_t, int, uint16_t, bool force);
2353 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2354
2355 extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
2356 safi_t safi);
2357 extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
2358 safi_t safi, uint32_t max);
2359 extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
2360 safi_t safi);
2361
2362 extern int peer_clear(struct peer *, struct listnode **);
2363 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2364
2365 extern int peer_ttl_security_hops_set(struct peer *, int);
2366 extern int peer_ttl_security_hops_unset(struct peer *);
2367
2368 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2369 extern void peer_tx_shutdown_message_unset(struct peer *);
2370
2371 extern void bgp_route_map_update_timer(struct event *thread);
2372 extern const char *bgp_get_name_by_role(uint8_t role);
2373 extern enum asnotation_mode bgp_get_asnotation(struct bgp *bgp);
2374
2375 extern void bgp_route_map_terminate(void);
2376
2377 extern int peer_cmp(struct peer *p1, struct peer *p2);
2378
2379 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2380 afi_t *afi, safi_t *safi);
2381 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2382 iana_afi_t *pkt_afi,
2383 iana_safi_t *pkt_safi);
2384
2385 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2386 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2387 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2388
2389 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2390 extern void bgp_shutdown_disable(struct bgp *bgp);
2391
2392 extern void bgp_close(void);
2393 extern void bgp_free(struct bgp *);
2394 void bgp_gr_apply_running_config(void);
2395
2396 /* BGP GR */
2397 int bgp_global_gr_init(struct bgp *bgp);
2398 int bgp_peer_gr_init(struct peer *peer);
2399
2400
2401 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2402 do { \
2403 struct peer *peer_loop; \
2404 bool gr_router_detected = false; \
2405 struct listnode *node = {0}; \
2406 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2407 if (CHECK_FLAG(peer_loop->flags, \
2408 PEER_FLAG_GRACEFUL_RESTART)) \
2409 gr_router_detected = true; \
2410 } \
2411 if (gr_router_detected \
2412 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2413 bgp_zebra_send_capabilities(_bgp, false); \
2414 } else if (!gr_router_detected \
2415 && _bgp->present_zebra_gr_state \
2416 == ZEBRA_GR_ENABLE) { \
2417 bgp_zebra_send_capabilities(_bgp, true); \
2418 } \
2419 } while (0)
2420
2421 static inline struct bgp *bgp_lock(struct bgp *bgp)
2422 {
2423 bgp->lock++;
2424 return bgp;
2425 }
2426
2427 static inline void bgp_unlock(struct bgp *bgp)
2428 {
2429 assert(bgp->lock > 0);
2430 if (--bgp->lock == 0)
2431 bgp_free(bgp);
2432 }
2433
2434 static inline int afindex(afi_t afi, safi_t safi)
2435 {
2436 switch (afi) {
2437 case AFI_IP:
2438 switch (safi) {
2439 case SAFI_UNICAST:
2440 return BGP_AF_IPV4_UNICAST;
2441 case SAFI_MULTICAST:
2442 return BGP_AF_IPV4_MULTICAST;
2443 case SAFI_LABELED_UNICAST:
2444 return BGP_AF_IPV4_LBL_UNICAST;
2445 case SAFI_MPLS_VPN:
2446 return BGP_AF_IPV4_VPN;
2447 case SAFI_ENCAP:
2448 return BGP_AF_IPV4_ENCAP;
2449 case SAFI_FLOWSPEC:
2450 return BGP_AF_IPV4_FLOWSPEC;
2451 case SAFI_EVPN:
2452 case SAFI_UNSPEC:
2453 case SAFI_MAX:
2454 return BGP_AF_MAX;
2455 }
2456 break;
2457 case AFI_IP6:
2458 switch (safi) {
2459 case SAFI_UNICAST:
2460 return BGP_AF_IPV6_UNICAST;
2461 case SAFI_MULTICAST:
2462 return BGP_AF_IPV6_MULTICAST;
2463 case SAFI_LABELED_UNICAST:
2464 return BGP_AF_IPV6_LBL_UNICAST;
2465 case SAFI_MPLS_VPN:
2466 return BGP_AF_IPV6_VPN;
2467 case SAFI_ENCAP:
2468 return BGP_AF_IPV6_ENCAP;
2469 case SAFI_FLOWSPEC:
2470 return BGP_AF_IPV6_FLOWSPEC;
2471 case SAFI_EVPN:
2472 case SAFI_UNSPEC:
2473 case SAFI_MAX:
2474 return BGP_AF_MAX;
2475 }
2476 break;
2477 case AFI_L2VPN:
2478 switch (safi) {
2479 case SAFI_EVPN:
2480 return BGP_AF_L2VPN_EVPN;
2481 case SAFI_UNICAST:
2482 case SAFI_MULTICAST:
2483 case SAFI_LABELED_UNICAST:
2484 case SAFI_MPLS_VPN:
2485 case SAFI_ENCAP:
2486 case SAFI_FLOWSPEC:
2487 case SAFI_UNSPEC:
2488 case SAFI_MAX:
2489 return BGP_AF_MAX;
2490 }
2491 break;
2492 case AFI_UNSPEC:
2493 case AFI_MAX:
2494 return BGP_AF_MAX;
2495 }
2496
2497 assert(!"Reached end of function we should never hit");
2498 }
2499
2500 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2501 static inline int peer_group_active(struct peer *peer)
2502 {
2503 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2504 return 1;
2505 return 0;
2506 }
2507
2508 /* If peer is negotiated at least one address family return 1. */
2509 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2510 {
2511 if (peer->afc_nego[afi][SAFI_UNICAST]
2512 || peer->afc_nego[afi][SAFI_MULTICAST]
2513 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2514 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2515 || peer->afc_nego[afi][SAFI_ENCAP]
2516 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2517 || peer->afc_nego[afi][SAFI_EVPN])
2518 return 1;
2519 return 0;
2520 }
2521
2522 /* If at least one address family activated for group, return 1. */
2523 static inline int peer_group_af_configured(struct peer_group *group)
2524 {
2525 struct peer *peer = group->conf;
2526
2527 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2528 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2529 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2530 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2531 || peer->afc[AFI_IP6][SAFI_UNICAST]
2532 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2533 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2534 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2535 || peer->afc[AFI_IP6][SAFI_ENCAP]
2536 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2537 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2538 return 1;
2539 return 0;
2540 }
2541
2542 static inline char *timestamp_string(time_t ts)
2543 {
2544 time_t tbuf;
2545 tbuf = time(NULL) - (monotime(NULL) - ts);
2546 return ctime(&tbuf);
2547 }
2548
2549 static inline bool peer_established(struct peer *peer)
2550 {
2551 return peer->status == Established;
2552 }
2553
2554 static inline bool peer_dynamic_neighbor(struct peer *peer)
2555 {
2556 return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
2557 }
2558
2559 static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
2560 {
2561 return (peer_dynamic_neighbor(peer) &&
2562 !CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
2563 }
2564
2565 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2566 {
2567 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2568 }
2569
2570 /* Lookup VRF for BGP instance based on its type. */
2571 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2572 {
2573 struct vrf *vrf;
2574
2575 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2576 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2577 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2578 vrf = vrf_lookup_by_name(bgp->name);
2579 else
2580 vrf = NULL;
2581
2582 return vrf;
2583 }
2584
2585 static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
2586 {
2587 struct vrf *vrf;
2588 struct interface *ifp;
2589 uint32_t count = 0;
2590
2591 /* if there is one interface in the vrf which is up then it is deemed
2592 * active
2593 */
2594 vrf = bgp_vrf_lookup_by_instance_type(bgp);
2595 if (vrf == NULL)
2596 return 0;
2597 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
2598 if (strcmp(ifp->name, bgp->name) == 0)
2599 continue;
2600 if (!active || if_is_up(ifp))
2601 count++;
2602 }
2603 return count;
2604 }
2605
2606 /* Link BGP instance to VRF. */
2607 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2608 {
2609 bgp->vrf_id = vrf->vrf_id;
2610 if (vrf->info != (void *)bgp)
2611 vrf->info = (void *)bgp_lock(bgp);
2612 }
2613
2614 /* Unlink BGP instance from VRF. */
2615 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2616 {
2617 if (vrf->info == (void *)bgp) {
2618 vrf->info = NULL;
2619 bgp_unlock(bgp);
2620 }
2621 bgp->vrf_id = VRF_UNKNOWN;
2622 }
2623
2624 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2625 {
2626 /* True if either set for this instance or globally */
2627 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2628 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2629 }
2630
2631 /* For benefit of rfapi */
2632 extern struct peer *peer_new(struct bgp *bgp);
2633
2634 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2635 const char *ip_str, bool use_json);
2636 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2637 const char *name,
2638 enum bgp_instance_type inst_type);
2639
2640 /* Hooks */
2641 DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
2642 (bgp, ifp));
2643 DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
2644 DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
2645 DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
2646 DECLARE_HOOK(bgp_snmp_update_stats,
2647 (struct bgp_node *rn, struct bgp_path_info *pi, bool added),
2648 (rn, pi, added));
2649 DECLARE_HOOK(bgp_rpki_prefix_status,
2650 (struct peer * peer, struct attr *attr,
2651 const struct prefix *prefix),
2652 (peer, attr, prefix));
2653
2654 void peer_nsf_stop(struct peer *peer);
2655
2656 void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
2657 void peer_tcp_mss_unset(struct peer *peer);
2658
2659 extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
2660 safi_t safi);
2661 extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
2662 int outbound);
2663 extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
2664 size_t size);
2665 extern bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
2666 size_t size);
2667 #ifdef _FRR_ATTRIBUTE_PRINTFRR
2668 /* clang-format off */
2669 #pragma FRR printfrr_ext "%pBP" (struct peer *)
2670 /* clang-format on */
2671 #endif
2672
2673 #endif /* _QUAGGA_BGPD_H */
FRRouting mirror