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bgpd: Limit peer output queue length like input queue length
[mirror_frr.git] / bgpd / bgpd.h
1 /* BGP message definition header.
2 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef _QUAGGA_BGPD_H
22 #define _QUAGGA_BGPD_H
23
24 #include "qobj.h"
25 #include <pthread.h>
26
27 #include "hook.h"
28 #include "frr_pthread.h"
29 #include "lib/json.h"
30 #include "vrf.h"
31 #include "vty.h"
32 #include "srv6.h"
33 #include "iana_afi.h"
34
35 /* For union sockunion. */
36 #include "queue.h"
37 #include "sockunion.h"
38 #include "routemap.h"
39 #include "linklist.h"
40 #include "defaults.h"
41 #include "bgp_memory.h"
42 #include "bitfield.h"
43 #include "vxlan.h"
44 #include "bgp_labelpool.h"
45 #include "bgp_addpath_types.h"
46 #include "bgp_nexthop.h"
47 #include "bgp_io.h"
48
49 #include "lib/bfd.h"
50 #include "lib/orr_msg.h"
51
52 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
53 #define BGP_PEER_MAX_HASH_SIZE 16384
54
55 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
56 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
57
58 struct update_subgroup;
59 struct bpacket;
60 struct bgp_pbr_config;
61
62 /*
63 * Allow the neighbor XXXX remote-as to take internal or external
64 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
65 * behavior
66 * in the system.
67 */
68 enum { AS_UNSPECIFIED = 0,
69 AS_SPECIFIED,
70 AS_INTERNAL,
71 AS_EXTERNAL,
72 };
73
74 /* Zebra Gracaful Restart states */
75 enum zebra_gr_mode {
76 ZEBRA_GR_DISABLE = 0,
77 ZEBRA_GR_ENABLE
78 };
79
80 /* Typedef BGP specific types. */
81 typedef uint32_t as_t;
82 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
83 typedef uint16_t bgp_size_t;
84
85 enum bgp_af_index {
86 BGP_AF_START,
87 BGP_AF_IPV4_UNICAST = BGP_AF_START,
88 BGP_AF_IPV4_MULTICAST,
89 BGP_AF_IPV4_VPN,
90 BGP_AF_IPV6_UNICAST,
91 BGP_AF_IPV6_MULTICAST,
92 BGP_AF_IPV6_VPN,
93 BGP_AF_IPV4_ENCAP,
94 BGP_AF_IPV6_ENCAP,
95 BGP_AF_L2VPN_EVPN,
96 BGP_AF_IPV4_LBL_UNICAST,
97 BGP_AF_IPV6_LBL_UNICAST,
98 BGP_AF_IPV4_FLOWSPEC,
99 BGP_AF_IPV6_FLOWSPEC,
100 BGP_AF_MAX
101 };
102
103 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
104
105 #define FOREACH_SAFI(safi) \
106 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
107
108 extern struct frr_pthread *bgp_pth_io;
109 extern struct frr_pthread *bgp_pth_ka;
110
111 /* BGP master for system wide configurations and variables. */
112 struct bgp_master {
113 /* BGP instance list. */
114 struct list *bgp;
115
116 /* BGP thread master. */
117 struct thread_master *master;
118
119 /* Listening sockets */
120 struct list *listen_sockets;
121
122 /* BGP port number. */
123 uint16_t port;
124
125 /* Listener addresses */
126 struct list *addresses;
127
128 /* The Mac table */
129 struct hash *self_mac_hash;
130
131 /* BGP start time. */
132 time_t start_time;
133
134 /* Various BGP global configuration. */
135 uint8_t options;
136
137 #define BGP_OPT_NO_FIB (1 << 0)
138 #define BGP_OPT_NO_LISTEN (1 << 1)
139 #define BGP_OPT_NO_ZEBRA (1 << 2)
140
141 uint64_t updgrp_idspace;
142 uint64_t subgrp_idspace;
143
144 /* timer to dampen route map changes */
145 struct thread *t_rmap_update; /* Handle route map updates */
146 uint32_t rmap_update_timer; /* Route map update timer */
147 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
148
149 /* Id space for automatic RD derivation for an EVI/VRF */
150 bitfield_t rd_idspace;
151
152 /* dynamic mpls label allocation pool */
153 struct labelpool labelpool;
154
155 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
156 struct bgp* bgp_evpn;
157
158 /* How big should we set the socket buffer size */
159 uint32_t socket_buffer;
160
161 /* Should we do wait for fib install globally? */
162 bool wait_for_fib;
163
164 /* EVPN multihoming */
165 struct bgp_evpn_mh_info *mh_info;
166
167 /* global update-delay timer values */
168 uint16_t v_update_delay;
169 uint16_t v_establish_wait;
170
171 uint32_t flags;
172 #define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
173 #define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)
174
175 bool terminating; /* global flag that sigint terminate seen */
176
177 /* DSCP value for TCP sessions */
178 uint8_t tcp_dscp;
179
180 #define BM_DEFAULT_Q_LIMIT 10000
181 uint32_t inq_limit;
182 uint32_t outq_limit;
183
184 QOBJ_FIELDS;
185 };
186 DECLARE_QOBJ_TYPE(bgp_master);
187
188 /* BGP route-map structure. */
189 struct bgp_rmap {
190 char *name;
191 struct route_map *map;
192 };
193
194 struct bgp_redist {
195 unsigned short instance;
196
197 /* BGP redistribute metric configuration. */
198 uint8_t redist_metric_flag;
199 uint32_t redist_metric;
200
201 /* BGP redistribute route-map. */
202 struct bgp_rmap rmap;
203 };
204
205 struct bgp_orr_igp_metric {
206 struct prefix prefix;
207 uint32_t igp_metric;
208 };
209
210 struct bgp_orr_group {
211 /* Name of this ORR group */
212 char *name;
213
214 /* Address Family Identifiers */
215 afi_t afi;
216 safi_t safi;
217
218 /* Pointer to BGP */
219 struct bgp *bgp;
220
221 /* Root Routers of the group */
222 struct peer *primary;
223 struct peer *secondary;
224 struct peer *tertiary;
225
226 /* Active Root Router of the group */
227 struct peer *active;
228
229 /* RR clients belong to this group */
230 struct list *rr_client_list;
231
232 /* IGP metric data from active root */
233 struct list *igp_metric_info;
234
235 /* Route table calculated from active root for this group */
236 struct bgp_table *route_table;
237 };
238
239 enum vpn_policy_direction {
240 BGP_VPN_POLICY_DIR_FROMVPN = 0,
241 BGP_VPN_POLICY_DIR_TOVPN = 1,
242 BGP_VPN_POLICY_DIR_MAX = 2
243 };
244
245 struct vpn_policy {
246 struct bgp *bgp; /* parent */
247 afi_t afi;
248 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
249 struct ecommunity *import_redirect_rtlist;
250 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
251 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
252
253 /* should be mpls_label_t? */
254 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
255 uint32_t tovpn_zebra_vrf_label_last_sent;
256 struct prefix_rd tovpn_rd;
257 struct prefix tovpn_nexthop; /* unset => set to 0 */
258 uint32_t flags;
259 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
260 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
261 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
262 #define BGP_VPN_POLICY_TOVPN_SID_AUTO (1 << 3)
263
264 /*
265 * If we are importing another vrf into us keep a list of
266 * vrf names that are being imported into us.
267 */
268 struct list *import_vrf;
269
270 /*
271 * if we are being exported to another vrf keep a list of
272 * vrf names that we are being exported to.
273 */
274 struct list *export_vrf;
275
276 /*
277 * Segment-Routing SRv6 Mode
278 */
279 uint32_t tovpn_sid_index; /* unset => set to 0 */
280 struct in6_addr *tovpn_sid;
281 struct srv6_locator_chunk *tovpn_sid_locator;
282 uint32_t tovpn_sid_transpose_label;
283 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
284 };
285
286 /*
287 * Type of 'struct bgp'.
288 * - Default: The default instance
289 * - VRF: A specific (non-default) VRF
290 * - View: An instance used for route exchange
291 * The "default" instance is treated separately to simplify the code. Note
292 * that if deployed in a Multi-VRF environment, it may not exist.
293 */
294 enum bgp_instance_type {
295 BGP_INSTANCE_TYPE_DEFAULT,
296 BGP_INSTANCE_TYPE_VRF,
297 BGP_INSTANCE_TYPE_VIEW
298 };
299
300 #define BGP_SEND_EOR(bgp, afi, safi) \
301 (!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
302 && ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
303 || (bgp->gr_info[afi][safi].eor_required \
304 == bgp->gr_info[afi][safi].eor_received)))
305
306 /* BGP GR Global ds */
307
308 #define BGP_GLOBAL_GR_MODE 4
309 #define BGP_GLOBAL_GR_EVENT_CMD 4
310
311 /* Graceful restart selection deferral timer info */
312 struct graceful_restart_info {
313 /* Count of EOR message expected */
314 uint32_t eor_required;
315 /* Count of EOR received */
316 uint32_t eor_received;
317 /* Deferral Timer */
318 struct thread *t_select_deferral;
319 /* Routes Deferred */
320 uint32_t gr_deferred;
321 /* Best route select */
322 struct thread *t_route_select;
323 /* AFI, SAFI enabled */
324 bool af_enabled[AFI_MAX][SAFI_MAX];
325 /* Route update completed */
326 bool route_sync[AFI_MAX][SAFI_MAX];
327 };
328
329 enum global_mode {
330 GLOBAL_HELPER = 0, /* This is the default mode */
331 GLOBAL_GR,
332 GLOBAL_DISABLE,
333 GLOBAL_INVALID
334 };
335
336 enum global_gr_command {
337 GLOBAL_GR_CMD = 0,
338 NO_GLOBAL_GR_CMD,
339 GLOBAL_DISABLE_CMD,
340 NO_GLOBAL_DISABLE_CMD
341 };
342
343 #define BGP_GR_SUCCESS 0
344 #define BGP_GR_FAILURE 1
345
346 /* Handling of BGP link bandwidth (LB) on receiver - whether and how to
347 * do weighted ECMP. Note: This applies after multipath computation.
348 */
349 enum bgp_link_bw_handling {
350 /* Do ECMP if some paths don't have LB - default */
351 BGP_LINK_BW_ECMP,
352 /* Completely ignore LB, just do regular ECMP */
353 BGP_LINK_BW_IGNORE_BW,
354 /* Skip paths without LB, do wECMP on others */
355 BGP_LINK_BW_SKIP_MISSING,
356 /* Do wECMP with default weight for paths not having LB */
357 BGP_LINK_BW_DEFWT_4_MISSING
358 };
359
360 RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
361 RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
362
363 struct bgp_snmp_stats {
364 /* SNMP variables for mplsL3Vpn*/
365 time_t creation_time;
366 time_t modify_time;
367 bool active;
368 uint32_t routes_added;
369 uint32_t routes_deleted;
370 };
371
372 struct bgp_srv6_function {
373 struct in6_addr sid;
374 char locator_name[SRV6_LOCNAME_SIZE];
375 };
376
377 /* BGP instance structure. */
378 struct bgp {
379 /* AS number of this BGP instance. */
380 as_t as;
381
382 /* Name of this BGP instance. */
383 char *name;
384 char *name_pretty; /* printable "VRF|VIEW name|default" */
385
386 /* Type of instance and VRF id. */
387 enum bgp_instance_type inst_type;
388 vrf_id_t vrf_id;
389
390 /* Reference count to allow peer_delete to finish after bgp_delete */
391 int lock;
392
393 /* Self peer. */
394 struct peer *peer_self;
395
396 /* BGP peer. */
397 struct list *peer;
398 struct hash *peerhash;
399
400 /* BGP peer group. */
401 struct list *group;
402
403 /* The maximum number of BGP dynamic neighbors that can be created */
404 int dynamic_neighbors_limit;
405
406 /* The current number of BGP dynamic neighbors */
407 int dynamic_neighbors_count;
408
409 struct hash *update_groups[BGP_AF_MAX];
410
411 /*
412 * Global statistics for update groups.
413 */
414 struct {
415 uint32_t join_events;
416 uint32_t prune_events;
417 uint32_t merge_events;
418 uint32_t split_events;
419 uint32_t updgrp_switch_events;
420 uint32_t peer_refreshes_combined;
421 uint32_t adj_count;
422 uint32_t merge_checks_triggered;
423
424 uint32_t updgrps_created;
425 uint32_t updgrps_deleted;
426 uint32_t subgrps_created;
427 uint32_t subgrps_deleted;
428 } update_group_stats;
429
430 struct bgp_snmp_stats *snmp_stats;
431
432 /* BGP configuration. */
433 uint16_t config;
434 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
435 #define BGP_CONFIG_CONFEDERATION (1 << 1)
436
437 /* BGP router identifier. */
438 struct in_addr router_id;
439 struct in_addr router_id_static;
440 struct in_addr router_id_zebra;
441
442 /* BGP route reflector cluster ID. */
443 struct in_addr cluster_id;
444
445 /* BGP confederation information. */
446 as_t confed_id;
447 as_t *confed_peers;
448 int confed_peers_cnt;
449
450 struct thread
451 *t_startup; /* start-up timer on only once at the beginning */
452
453 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
454 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
455 uint32_t maxmed_onstartup_value; /* Max-med value when active on
456 start-up */
457 struct thread
458 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
459 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
460
461 bool v_maxmed_admin; /* true/false if max-med administrative is on/off
462 */
463 #define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
464 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
465 */
466 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
467
468 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
469 uint32_t maxmed_value; /* Max-med value when its active */
470
471 /* BGP update delay on startup */
472 struct thread *t_update_delay;
473 struct thread *t_establish_wait;
474 struct thread *t_revalidate[AFI_MAX][SAFI_MAX];
475
476 uint8_t update_delay_over;
477 uint8_t main_zebra_update_hold;
478 uint8_t main_peers_update_hold;
479 uint16_t v_update_delay;
480 uint16_t v_establish_wait;
481 char update_delay_begin_time[64];
482 char update_delay_end_time[64];
483 char update_delay_zebra_resume_time[64];
484 char update_delay_peers_resume_time[64];
485 uint32_t established;
486 uint32_t restarted_peers;
487 uint32_t implicit_eors;
488 uint32_t explicit_eors;
489 #define BGP_UPDATE_DELAY_DEF 0
490 #define BGP_UPDATE_DELAY_MIN 0
491 #define BGP_UPDATE_DELAY_MAX 3600
492
493 /* Reference bandwidth for BGP link-bandwidth. Used when
494 * the LB value has to be computed based on some other
495 * factor (e.g., number of multipaths for the prefix)
496 * Value is in Mbps
497 */
498 uint32_t lb_ref_bw;
499 #define BGP_LINK_BW_REF_BW 1
500
501 /* BGP flags. */
502 uint64_t flags;
503 #define BGP_FLAG_ALWAYS_COMPARE_MED (1ULL << 0)
504 #define BGP_FLAG_DETERMINISTIC_MED (1ULL << 1)
505 #define BGP_FLAG_MED_MISSING_AS_WORST (1ULL << 2)
506 #define BGP_FLAG_MED_CONFED (1ULL << 3)
507 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1ULL << 4)
508 #define BGP_FLAG_COMPARE_ROUTER_ID (1ULL << 5)
509 #define BGP_FLAG_ASPATH_IGNORE (1ULL << 6)
510 #define BGP_FLAG_IMPORT_CHECK (1ULL << 7)
511 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1ULL << 8)
512 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1ULL << 9)
513
514 /* This flag is set when we have full BGP Graceful-Restart mode enable */
515 #define BGP_FLAG_GRACEFUL_RESTART (1ULL << 10)
516
517 #define BGP_FLAG_ASPATH_CONFED (1ULL << 11)
518 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1ULL << 12)
519 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1ULL << 13)
520 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1ULL << 14)
521 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1ULL << 15)
522 #define BGP_FLAG_FORCE_STATIC_PROCESS (1ULL << 16)
523 #define BGP_FLAG_SHOW_HOSTNAME (1ULL << 17)
524 #define BGP_FLAG_GR_PRESERVE_FWD (1ULL << 18)
525 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1ULL << 19)
526 #define BGP_FLAG_DELETE_IN_PROGRESS (1ULL << 20)
527 #define BGP_FLAG_SELECT_DEFER_DISABLE (1ULL << 21)
528 #define BGP_FLAG_GR_DISABLE_EOR (1ULL << 22)
529 #define BGP_FLAG_EBGP_REQUIRES_POLICY (1ULL << 23)
530 #define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1ULL << 24)
531
532 /* This flag is set if the instance is in administrative shutdown */
533 #define BGP_FLAG_SHUTDOWN (1ULL << 25)
534 #define BGP_FLAG_SUPPRESS_FIB_PENDING (1ULL << 26)
535 #define BGP_FLAG_SUPPRESS_DUPLICATES (1ULL << 27)
536 #define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1ULL << 29)
537 /* Indicate Graceful Restart support for BGP NOTIFICATION messages */
538 #define BGP_FLAG_GRACEFUL_NOTIFICATION (1ULL << 30)
539 /* Send Hard Reset CEASE Notification for 'Administrative Reset' */
540 #define BGP_FLAG_HARD_ADMIN_RESET (1ULL << 31)
541 /* Evaluate the AIGP attribute during the best path selection process */
542 #define BGP_FLAG_COMPARE_AIGP (1ULL << 32)
543
544 /* BGP default address-families.
545 * New peers inherit enabled afi/safis from bgp instance.
546 */
547 uint16_t default_af[AFI_MAX][SAFI_MAX];
548
549 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
550 [BGP_GLOBAL_GR_EVENT_CMD];
551 enum global_mode global_gr_present_state;
552
553 /* This variable stores the current Graceful Restart state of Zebra
554 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
555 */
556 enum zebra_gr_mode present_zebra_gr_state;
557
558 /* BGP Per AF flags */
559 uint16_t af_flags[AFI_MAX][SAFI_MAX];
560 #define BGP_CONFIG_DAMPENING (1 << 0)
561 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
562 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
563 #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
564 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
565 #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
566 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
567 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
568 /* import/export between address families */
569 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
570 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
571 /* vrf-route leaking flags */
572 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
573 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
574 /* vpnvx retain flag */
575 #define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
576
577 /* BGP per AF peer count */
578 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
579
580 /* Tree for next-hop lookup cache. */
581 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
582
583 /* Tree for import-check */
584 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
585
586 struct bgp_table *connected_table[AFI_MAX];
587
588 struct hash *address_hash;
589
590 /* DB for all local tunnel-ips - used mainly for martian checks
591 Currently it only has all VxLan tunnel IPs*/
592 struct hash *tip_hash;
593
594 /* Static route configuration. */
595 struct bgp_table *route[AFI_MAX][SAFI_MAX];
596
597 /* Aggregate address configuration. */
598 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
599
600 /* BGP routing information base. */
601 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
602
603 /* BGP table route-map. */
604 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
605
606 /* BGP redistribute configuration. */
607 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
608
609 /* Allocate MPLS labels */
610 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
611
612 /* Allocate hash entries to store policy routing information
613 * The hash are used to host pbr rules somewhere.
614 * Actually, pbr will only be used by flowspec
615 * those hash elements will have relationship together as
616 * illustrated in below diagram:
617 *
618 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
619 * <----- pbr_match j <--- pbr_match_entry 1..m
620 * <----- pbr_rule k
621 *
622 * - here in BGP structure, the list of match and actions will
623 * stand for the list of ipset sets, and table_ids in the kernel
624 * - the arrow above between pbr_match and pbr_action indicate
625 * that a backpointer permits match to find the action
626 * - the arrow betwen match_entry and match is a hash list
627 * contained in match, that lists the whole set of entries
628 */
629 struct hash *pbr_match_hash;
630 struct hash *pbr_rule_hash;
631 struct hash *pbr_action_hash;
632
633 /* timer to re-evaluate neighbor default-originate route-maps */
634 struct thread *t_rmap_def_originate_eval;
635 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
636
637 /* BGP distance configuration. */
638 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
639 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
640 uint8_t distance_local[AFI_MAX][SAFI_MAX];
641
642 /* BGP default local-preference. */
643 uint32_t default_local_pref;
644
645 /* BGP default subgroup pkt queue max */
646 uint32_t default_subgroup_pkt_queue_max;
647
648 /* BGP default timer. */
649 uint32_t default_holdtime;
650 uint32_t default_keepalive;
651 uint32_t default_connect_retry;
652 uint32_t default_delayopen;
653
654 /* BGP minimum holdtime. */
655 uint16_t default_min_holdtime;
656
657 /* BGP graceful restart */
658 uint32_t restart_time;
659 uint32_t stalepath_time;
660 uint32_t select_defer_time;
661 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
662 uint32_t rib_stale_time;
663
664 /* BGP Long-lived Graceful Restart */
665 uint32_t llgr_stale_time;
666
667 #define BGP_ROUTE_SELECT_DELAY 1
668 #define BGP_MAX_BEST_ROUTE_SELECT 10000
669 /* Maximum-paths configuration */
670 struct bgp_maxpaths_cfg {
671 uint16_t maxpaths_ebgp;
672 uint16_t maxpaths_ibgp;
673 bool same_clusterlen;
674 } maxpaths[AFI_MAX][SAFI_MAX];
675
676 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
677 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
678
679 /* Automatic coalesce adjust on/off */
680 bool heuristic_coalesce;
681 /* Actual coalesce time */
682 uint32_t coalesce_time;
683
684 /* Auto-shutdown new peers */
685 bool autoshutdown;
686
687 struct bgp_addpath_bgp_data tx_addpath;
688
689 #ifdef ENABLE_BGP_VNC
690 struct rfapi_cfg *rfapi_cfg;
691 struct rfapi *rfapi;
692 #endif
693
694 /* EVPN related information */
695
696 /* EVI hash table */
697 struct hash *vnihash;
698
699 /*
700 * VNI hash table based on SVI ifindex as its key.
701 * We use SVI ifindex as key to lookup a VNI table for gateway IP
702 * overlay index recursive lookup.
703 * For this purpose, a hashtable is added which optimizes this lookup.
704 */
705 struct hash *vni_svi_hash;
706
707 /* EVPN enable - advertise gateway macip routes */
708 int advertise_gw_macip;
709
710 /* EVPN enable - advertise local VNIs and their MACs etc. */
711 int advertise_all_vni;
712
713 /* draft-ietf-idr-deprecate-as-set-confed-set
714 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
715 */
716 bool reject_as_sets;
717
718 struct bgp_evpn_info *evpn_info;
719
720 /* EVPN - use RFC 8365 to auto-derive RT */
721 int advertise_autort_rfc8365;
722
723 /*
724 * Flooding mechanism for BUM packets for VxLAN-EVPN.
725 */
726 enum vxlan_flood_control vxlan_flood_ctrl;
727
728 /* Hash table of Import RTs to EVIs */
729 struct hash *import_rt_hash;
730
731 /* Hash table of VRF import RTs to VRFs */
732 struct hash *vrf_import_rt_hash;
733
734 /* L3-VNI corresponding to this vrf */
735 vni_t l3vni;
736
737 /* router-mac to be used in mac-ip routes for this vrf */
738 struct ethaddr rmac;
739
740 /* originator ip - to be used as NH for type-5 routes */
741 struct in_addr originator_ip;
742
743 /* SVI associated with the L3-VNI corresponding to this vrf */
744 ifindex_t l3vni_svi_ifindex;
745
746 /* RB tree of ES-VRFs */
747 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
748
749 /* Hash table of EVPN nexthops maintained per-tenant-VRF */
750 struct hash *evpn_nh_table;
751
752 /*
753 * Flag resolve_overlay_index is used for recursive resolution
754 * procedures for EVPN type-5 route's gateway IP overlay index.
755 * When this flag is set, we build remote-ip-hash for
756 * all L2VNIs and resolve overlay index nexthops using this hash.
757 * Overlay index nexthops remain unresolved if this flag is not set.
758 */
759 bool resolve_overlay_index;
760
761 /* vrf flags */
762 uint32_t vrf_flags;
763 #define BGP_VRF_AUTO (1 << 0)
764 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
765 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
766 #define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
767 #define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
768 #define BGP_VRF_RD_CFGD (1 << 5)
769 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
770 /* per-VRF toVPN SID */
771 #define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
772
773 /* unique ID for auto derivation of RD for this vrf */
774 uint16_t vrf_rd_id;
775
776 /* Automatically derived RD for this VRF */
777 struct prefix_rd vrf_prd_auto;
778
779 /* RD for this VRF */
780 struct prefix_rd vrf_prd;
781
782 /* import rt list for the vrf instance */
783 struct list *vrf_import_rtl;
784
785 /* export rt list for the vrf instance */
786 struct list *vrf_export_rtl;
787
788 /* list of corresponding l2vnis (struct bgpevpn) */
789 struct list *l2vnis;
790
791 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
792 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
793
794 struct vpn_policy vpn_policy[AFI_MAX];
795
796 struct bgp_pbr_config *bgp_pbr_cfg;
797
798 /* Count of peers in established state */
799 uint32_t established_peers;
800
801 /* Weighted ECMP related config. */
802 enum bgp_link_bw_handling lb_handling;
803
804 /* Process Queue for handling routes */
805 struct work_queue *process_queue;
806
807 bool fast_convergence;
808
809 /* BGP Conditional advertisement */
810 uint32_t condition_check_period;
811 uint32_t condition_filter_count;
812 struct thread *t_condition_check;
813
814 /* BGP VPN SRv6 backend */
815 bool srv6_enabled;
816 char srv6_locator_name[SRV6_LOCNAME_SIZE];
817 struct list *srv6_locator_chunks;
818 struct list *srv6_functions;
819 uint32_t tovpn_sid_index; /* unset => set to 0 */
820 struct in6_addr *tovpn_sid;
821 struct srv6_locator_chunk *tovpn_sid_locator;
822 uint32_t tovpn_sid_transpose_label;
823 struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
824
825 /* TCP keepalive parameters for BGP connection */
826 uint16_t tcp_keepalive_idle;
827 uint16_t tcp_keepalive_intvl;
828 uint16_t tcp_keepalive_probes;
829
830 struct timeval ebgprequirespolicywarning;
831 #define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
832
833 bool allow_martian;
834
835 /* BGP optimal route reflection group and Root Router configuration */
836 uint32_t orr_group_count;
837 struct list *orr_group[AFI_MAX][SAFI_MAX];
838
839 QOBJ_FIELDS;
840 };
841 DECLARE_QOBJ_TYPE(bgp);
842
843 struct bgp_interface {
844 #define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
845 uint32_t flags;
846 };
847
848 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
849 DECLARE_HOOK(bgp_inst_config_write,
850 (struct bgp *bgp, struct vty *vty),
851 (bgp, vty));
852 DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
853
854 /* Thread callback information */
855 struct afi_safi_info {
856 afi_t afi;
857 safi_t safi;
858 struct bgp *bgp;
859 };
860
861 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
862
863 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
864 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
865 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
866 && bgp->vrf_id != VRF_UNKNOWN))
867
868 #define BGP_SELECT_DEFER_DISABLE(bgp) \
869 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
870
871 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
872 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
873 || bm->wait_for_fib)
874
875 /* BGP peer-group support. */
876 struct peer_group {
877 /* Name of the peer-group. */
878 char *name;
879
880 /* Pointer to BGP. */
881 struct bgp *bgp;
882
883 /* Peer-group client list. */
884 struct list *peer;
885
886 /** Dynamic neighbor listening ranges */
887 struct list *listen_range[AFI_MAX];
888
889 /* Peer-group config */
890 struct peer *conf;
891 };
892
893 /* BGP Notify message format. */
894 struct bgp_notify {
895 uint8_t code;
896 uint8_t subcode;
897 char *data;
898 bgp_size_t length;
899 uint8_t *raw_data;
900 bool hard_reset;
901 };
902
903 /* Next hop self address. */
904 struct bgp_nexthop {
905 struct interface *ifp;
906 struct in_addr v4;
907 struct in6_addr v6_global;
908 struct in6_addr v6_local;
909 };
910
911 /* BGP addpath values */
912 #define BGP_ADDPATH_RX 1
913 #define BGP_ADDPATH_TX 2
914 #define BGP_ADDPATH_ID_LEN 4
915
916 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
917
918 /* Route map direction */
919 #define RMAP_IN 0
920 #define RMAP_OUT 1
921 #define RMAP_MAX 2
922
923 #define BGP_DEFAULT_TTL 1
924 #define BGP_GTSM_HOPS_DISABLED 0
925 #define BGP_GTSM_HOPS_CONNECTED 1
926
927 /* Advertise map */
928 #define CONDITION_NON_EXIST false
929 #define CONDITION_EXIST true
930
931 enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
932
933 #include "filter.h"
934
935 /* BGP filter structure. */
936 struct bgp_filter {
937 /* Distribute-list. */
938 struct {
939 char *name;
940 struct access_list *alist;
941 } dlist[FILTER_MAX];
942
943 /* Prefix-list. */
944 struct {
945 char *name;
946 struct prefix_list *plist;
947 } plist[FILTER_MAX];
948
949 /* Filter-list. */
950 struct {
951 char *name;
952 struct as_list *aslist;
953 } aslist[FILTER_MAX];
954
955 /* Route-map. */
956 struct {
957 char *name;
958 struct route_map *map;
959 } map[RMAP_MAX];
960
961 /* Unsuppress-map. */
962 struct {
963 char *name;
964 struct route_map *map;
965 } usmap;
966
967 /* Advertise-map */
968 struct {
969 char *aname;
970 struct route_map *amap;
971
972 bool condition;
973
974 char *cname;
975 struct route_map *cmap;
976
977 enum update_type update_type;
978 } advmap;
979 };
980
981 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
982 a peer who's AS is part of our Confederation. */
983 enum bgp_peer_sort {
984 BGP_PEER_UNSPECIFIED,
985 BGP_PEER_IBGP,
986 BGP_PEER_EBGP,
987 BGP_PEER_INTERNAL,
988 BGP_PEER_CONFED,
989 };
990
991 /* BGP message header and packet size. */
992 #define BGP_MARKER_SIZE 16
993 #define BGP_HEADER_SIZE 19
994 #define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
995 #define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
996 #define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
997 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
998
999 /*
1000 * Trigger delay for bgp_announce_route().
1001 */
1002 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
1003 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
1004
1005 struct peer_af {
1006 /* back pointer to the peer */
1007 struct peer *peer;
1008
1009 /* which subgroup the peer_af belongs to */
1010 struct update_subgroup *subgroup;
1011
1012 /* for being part of an update subgroup's peer list */
1013 LIST_ENTRY(peer_af) subgrp_train;
1014
1015 /* for being part of a packet's peer list */
1016 LIST_ENTRY(peer_af) pkt_train;
1017
1018 struct bpacket *next_pkt_to_send;
1019
1020 /*
1021 * Trigger timer for bgp_announce_route().
1022 */
1023 struct thread *t_announce_route;
1024
1025 afi_t afi;
1026 safi_t safi;
1027 int afid;
1028 };
1029 /* BGP GR per peer ds */
1030
1031 #define BGP_PEER_GR_MODE 5
1032 #define BGP_PEER_GR_EVENT_CMD 6
1033
1034 enum peer_mode {
1035 PEER_HELPER = 0,
1036 PEER_GR,
1037 PEER_DISABLE,
1038 PEER_INVALID,
1039 PEER_GLOBAL_INHERIT /* This is the default mode */
1040
1041 };
1042
1043 enum peer_gr_command {
1044 PEER_GR_CMD = 0,
1045 NO_PEER_GR_CMD,
1046 PEER_DISABLE_CMD,
1047 NO_PEER_DISABLE_CMD,
1048 PEER_HELPER_CMD,
1049 NO_PEER_HELPER_CMD
1050 };
1051
1052 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
1053
1054 struct bgp_peer_gr {
1055 enum peer_mode next_state;
1056 bgp_peer_gr_action_ptr action_fun;
1057 };
1058
1059 /*
1060 * BGP FSM event codes, per RFC 4271 ss. 8.1
1061 */
1062 enum bgp_fsm_rfc_codes {
1063 BGP_FSM_ManualStart = 1,
1064 BGP_FSM_ManualStop = 2,
1065 BGP_FSM_AutomaticStart = 3,
1066 BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
1067 BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
1068 BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
1069 BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
1070 7,
1071 BGP_FSM_AutomaticStop = 8,
1072 BGP_FSM_ConnectRetryTimer_Expires = 9,
1073 BGP_FSM_HoldTimer_Expires = 10,
1074 BGP_FSM_KeepaliveTimer_Expires = 11,
1075 BGP_FSM_DelayOpenTimer_Expires = 12,
1076 BGP_FSM_IdleHoldTimer_Expires = 13,
1077 BGP_FSM_TcpConnection_Valid = 14,
1078 BGP_FSM_Tcp_CR_Invalid = 15,
1079 BGP_FSM_Tcp_CR_Acked = 16,
1080 BGP_FSM_TcpConnectionConfirmed = 17,
1081 BGP_FSM_TcpConnectionFails = 18,
1082 BGP_FSM_BGPOpen = 19,
1083 BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
1084 BGP_FSM_BGPHeaderErr = 21,
1085 BGP_FSM_BGPOpenMsgErr = 22,
1086 BGP_FSM_OpenCollisionDump = 23,
1087 BGP_FSM_NotifMsgVerErr = 24,
1088 BGP_FSM_NotifMsg = 25,
1089 BGP_FSM_KeepAliveMsg = 26,
1090 BGP_FSM_UpdateMsg = 27,
1091 BGP_FSM_UpdateMsgErr = 28
1092 };
1093
1094 /*
1095 * BGP finite state machine events
1096 *
1097 * Note: these do not correspond to RFC-defined event codes. Those are
1098 * defined elsewhere.
1099 */
1100 enum bgp_fsm_events {
1101 BGP_Start = 1,
1102 BGP_Stop,
1103 TCP_connection_open,
1104 TCP_connection_open_w_delay,
1105 TCP_connection_closed,
1106 TCP_connection_open_failed,
1107 TCP_fatal_error,
1108 ConnectRetry_timer_expired,
1109 Hold_Timer_expired,
1110 KeepAlive_timer_expired,
1111 DelayOpen_timer_expired,
1112 Receive_OPEN_message,
1113 Receive_KEEPALIVE_message,
1114 Receive_UPDATE_message,
1115 Receive_NOTIFICATION_message,
1116 Clearing_Completed,
1117 BGP_EVENTS_MAX,
1118 };
1119
1120 /* BGP finite state machine status. */
1121 enum bgp_fsm_status {
1122 Idle = 1,
1123 Connect,
1124 Active,
1125 OpenSent,
1126 OpenConfirm,
1127 Established,
1128 Clearing,
1129 Deleted,
1130 BGP_STATUS_MAX,
1131 };
1132
1133 #define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
1134
1135 struct llgr_info {
1136 uint32_t stale_time;
1137 uint8_t flags;
1138 };
1139
1140 /* BGP neighbor structure. */
1141 struct peer {
1142 /* BGP structure. */
1143 struct bgp *bgp;
1144
1145 /* reference count, primarily to allow bgp_process'ing of route_node's
1146 * to be done after a struct peer is deleted.
1147 *
1148 * named 'lock' for hysterical reasons within Quagga.
1149 */
1150 int lock;
1151
1152 /* BGP peer group. */
1153 struct peer_group *group;
1154 uint64_t version[AFI_MAX][SAFI_MAX];
1155
1156 /* BGP peer_af structures, per configured AF on this peer */
1157 struct peer_af *peer_af_array[BGP_AF_MAX];
1158
1159 /* Peer's remote AS number. */
1160 int as_type;
1161 as_t as;
1162
1163 /* Peer's local AS number. */
1164 as_t local_as;
1165
1166 enum bgp_peer_sort sort;
1167
1168 /* Peer's Change local AS number. */
1169 as_t change_local_as;
1170
1171 /* Remote router ID. */
1172 struct in_addr remote_id;
1173
1174 /* Local router ID. */
1175 struct in_addr local_id;
1176
1177 /* Packet receive and send buffer. */
1178 pthread_mutex_t io_mtx; // guards ibuf, obuf
1179 struct stream_fifo *ibuf; // packets waiting to be processed
1180 struct stream_fifo *obuf; // packets waiting to be written
1181
1182 /* used as a block to deposit raw wire data to */
1183 uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
1184 * BGP_READ_PACKET_MAX];
1185 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
1186 struct stream *obuf_work; // WiP buffer used to construct packets
1187
1188 struct stream *curr; // the current packet being parsed
1189
1190 /* We use a separate stream to encode MP_REACH_NLRI for efficient
1191 * NLRI packing. peer->obuf_work stores all the other attributes. The
1192 * actual packet is then constructed by concatenating the two.
1193 */
1194 struct stream *scratch;
1195
1196 /* the doppelganger peer structure, due to dual TCP conn setup */
1197 struct peer *doppelganger;
1198
1199 /* Status of the peer. */
1200 enum bgp_fsm_status status;
1201 enum bgp_fsm_status ostatus;
1202
1203 /* FSM events, stored for debug purposes.
1204 * Note: uchar used for reduced memory usage.
1205 */
1206 enum bgp_fsm_events cur_event;
1207 enum bgp_fsm_events last_event;
1208 enum bgp_fsm_events last_major_event;
1209
1210 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1211 uint16_t table_dump_index;
1212
1213 /* Peer information */
1214 int fd; /* File descriptor */
1215 int ttl; /* TTL of TCP connection to the peer. */
1216 int rtt; /* Estimated round-trip-time from TCP_INFO */
1217 int rtt_expected; /* Expected round-trip-time for a peer */
1218 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1219 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1220 int gtsm_hops; /* minimum hopcount to peer */
1221 char *desc; /* Description of the peer. */
1222 unsigned short port; /* Destination port for peer */
1223 char *host; /* Printable address of the peer. */
1224 union sockunion su; /* Sockunion address of the peer. */
1225 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1226 time_t uptime; /* Last Up/Down time */
1227 time_t readtime; /* Last read time */
1228 time_t resettime; /* Last reset time */
1229
1230 char *conf_if; /* neighbor interface config name. */
1231 struct interface *ifp; /* corresponding interface */
1232 char *ifname; /* bind interface name. */
1233 char *update_if;
1234 union sockunion *update_source;
1235
1236 union sockunion *su_local; /* Sockunion of local address. */
1237 union sockunion *su_remote; /* Sockunion of remote address. */
1238 int shared_network; /* Is this peer shared same network. */
1239 struct bgp_nexthop nexthop; /* Nexthop */
1240
1241 /* Roles in bgp session */
1242 uint8_t local_role;
1243 uint8_t remote_role;
1244 #define ROLE_PROVIDER 0
1245 #define ROLE_RS_SERVER 1
1246 #define ROLE_RS_CLIENT 2
1247 #define ROLE_CUSTOMER 3
1248 #define ROLE_PEER 4
1249 #define ROLE_UNDEFINED 255
1250
1251 #define ROLE_NAME_MAX_LEN 20
1252
1253 /* Peer address family configuration. */
1254 uint8_t afc[AFI_MAX][SAFI_MAX];
1255 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1256 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1257 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1258
1259 /* Capability flags (reset in bgp_stop) */
1260 uint32_t cap;
1261 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1262 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1263 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1264 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1265 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1266 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1267 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1268 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1269 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1270 /* sent graceful-restart restart (R) bit */
1271 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
1272 /* received graceful-restart restart (R) bit */
1273 #define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
1274 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1275 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1276 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1277 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1278 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1279 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1280 #define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
1281 #define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
1282 #define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
1283 #define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
1284 #define PEER_CAP_LLGR_ADV (1U << 21)
1285 #define PEER_CAP_LLGR_RCV (1U << 22)
1286 /* sent graceful-restart notification (N) bit */
1287 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
1288 /* received graceful-restart notification (N) bit */
1289 #define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
1290 #define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
1291 #define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
1292
1293 /* Capability flags (reset in bgp_stop) */
1294 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1295 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1296 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1297 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1298 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1299 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1300 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1301 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1302 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1303 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1304 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1305 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1306 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1307 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1308 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1309 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1310 #define PEER_CAP_LLGR_AF_ADV (1U << 15)
1311 #define PEER_CAP_LLGR_AF_RCV (1U << 16)
1312
1313 /* Global configuration flags. */
1314 /*
1315 * Parallel array to flags that indicates whether each flag originates
1316 * from a peer-group or if it is config that is specific to this
1317 * individual peer. If a flag is set independent of the peer-group, the
1318 * same bit should be set here. If this peer is a peer-group, this
1319 * memory region should be all zeros.
1320 *
1321 * The assumption is that the default state for all flags is unset,
1322 * so if a flag is unset, the corresponding override flag is unset too.
1323 * However if a flag is set, the corresponding override flag is set.
1324 */
1325 uint32_t flags_override;
1326 /*
1327 * Parallel array to flags that indicates whether the default behavior
1328 * of *flags_override* should be inverted. If a flag is unset and the
1329 * corresponding invert flag is set, the corresponding override flag
1330 * would be set. However if a flag is set and the corresponding invert
1331 * flag is unset, the corresponding override flag would be unset.
1332 *
1333 * This can be used for attributes like *send-community*, which are
1334 * implicitely enabled and have to be disabled explicitely, compared to
1335 * 'normal' attributes like *next-hop-self* which are implicitely set.
1336 *
1337 * All operations dealing with flags should apply the following boolean
1338 * logic to keep the internal flag system in a sane state:
1339 *
1340 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1341 * value=0 invert=1 Unset flag unconditionally
1342 * value=1 invert=0 Set flag unconditionally
1343 * value=1 invert=1 Inherit flag if member, otherwise set flag
1344 *
1345 * Contrary to the implementation of *flags_override*, the flag
1346 * inversion state can be set either on the peer OR the peer *and* the
1347 * peer-group. This was done on purpose, as the inversion state of a
1348 * flag can be determined on either the peer or the peer-group.
1349 *
1350 * Example: Enabling the cisco configuration mode inverts all flags
1351 * related to *send-community* unconditionally for both peer-groups and
1352 * peers.
1353 *
1354 * This behavior is different for interface peers though, which enable
1355 * the *extended-nexthop* flag by default, which regular peers do not.
1356 * As the peer-group can contain both regular and interface peers, the
1357 * flag inversion state must be set on the peer only.
1358 *
1359 * When a peer inherits the configuration from a peer-group and the
1360 * inversion state of the flag differs between peer and peer-group, the
1361 * newly set value must equal to the inverted state of the peer-group.
1362 */
1363 uint32_t flags_invert;
1364 /*
1365 * Effective array for storing the peer/peer-group flags. In case of a
1366 * peer-group, the peer-specific overrides (see flags_override and
1367 * flags_invert) must be respected.
1368 */
1369 uint64_t flags;
1370 #define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
1371 #define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
1372 #define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
1373 #define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
1374 #define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
1375 #define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
1376 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
1377 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
1378 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
1379 #define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
1380 #define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
1381 #define PEER_FLAG_LONESOUL (1ULL << 11)
1382 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
1383 #define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
1384 #define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
1385 #define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
1386 #define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
1387 #define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
1388 #define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
1389 #define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
1390 #define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
1391 #define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
1392 #define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
1393
1394 /* BGP-GR Peer related flags */
1395 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
1396 #define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
1397 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
1398 #define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
1399 #define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
1400 #define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
1401 /* Disable IEEE floating-point link bandwidth encoding in
1402 * extended communities.
1403 */
1404 #define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
1405 /* force the extended format for Optional Parameters in OPEN message */
1406 #define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
1407
1408 /* BGP Open Policy flags.
1409 * Enforce using roles on both sides:
1410 * `local-role ROLE strict-mode` configured.
1411 */
1412 #define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
1413 /* `local-role` configured */
1414 #define PEER_FLAG_ROLE (1ULL << 32)
1415 #define PEER_FLAG_PORT (1ULL << 33)
1416 #define PEER_FLAG_AIGP (1ULL << 34)
1417 #define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
1418
1419 /*
1420 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1421 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1422 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1423 */
1424
1425 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1426 enum peer_mode peer_gr_present_state;
1427 /* Non stop forwarding afi-safi count for BGP gr feature*/
1428 uint8_t nsf_af_count;
1429
1430 uint8_t peer_gr_new_status_flag;
1431 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1432 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1433 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1434
1435 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1436 char *tx_shutdown_message;
1437
1438 /* NSF mode (graceful restart) */
1439 uint8_t nsf[AFI_MAX][SAFI_MAX];
1440 /* EOR Send time */
1441 time_t eor_stime[AFI_MAX][SAFI_MAX];
1442 /* Last update packet sent time */
1443 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1444
1445 /* Peer Per AF flags */
1446 /*
1447 * Please consult the comments for *flags_override*, *flags_invert* and
1448 * *flags* to understand what these three arrays do. The address-family
1449 * specific attributes are being treated the exact same way as global
1450 * peer attributes.
1451 */
1452 uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
1453 uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
1454 uint64_t af_flags[AFI_MAX][SAFI_MAX];
1455 #define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
1456 #define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
1457 #define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
1458 #define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
1459 #define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
1460 #define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
1461 #define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
1462 #define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
1463 #define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
1464 #define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
1465 #define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
1466 #define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
1467 #define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
1468 #define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
1469 #define PEER_FLAG_MAX_PREFIX (1ULL << 14)
1470 #define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
1471 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
1472 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
1473 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
1474 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
1475 #define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
1476 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
1477 #define PEER_FLAG_WEIGHT (1ULL << 24)
1478 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 25)
1479 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 26)
1480 #define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 27)
1481 #define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 28)
1482 #define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 29)
1483 #define PEER_FLAG_SOO (1ULL << 30)
1484 #define PEER_FLAG_ORR_GROUP (1ULL << 31) /* Optimal-Route-Reflection */
1485 #define PEER_FLAG_ACCEPT_OWN (1ULL << 32)
1486
1487 /* BGP Optimal Route Reflection Group name */
1488 char *orr_group_name[AFI_MAX][SAFI_MAX];
1489
1490 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1491
1492 /* MD5 password */
1493 char *password;
1494
1495 /* default-originate route-map. */
1496 struct {
1497 char *name;
1498 struct route_map *map;
1499 } default_rmap[AFI_MAX][SAFI_MAX];
1500
1501 /* Peer status flags. */
1502 uint16_t sflags;
1503 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1504 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1505 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1506 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1507 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1508 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1509 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1510 /* received extended format encoding for OPEN message */
1511 #define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
1512
1513 /* Peer status af flags (reset in bgp_stop) */
1514 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1515 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1516 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1517 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1518 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1519 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1520 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1521 #define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
1522 #define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
1523 #define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
1524 #define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
1525 #define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
1526 /* LLGR aware peer */
1527 #define PEER_STATUS_LLGR_WAIT (1U << 11)
1528 #define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
1529 #define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
1530
1531 /* Configured timer values. */
1532 _Atomic uint32_t holdtime;
1533 _Atomic uint32_t keepalive;
1534 _Atomic uint32_t connect;
1535 _Atomic uint32_t routeadv;
1536 _Atomic uint32_t delayopen;
1537
1538 /* Timer values. */
1539 _Atomic uint32_t v_start;
1540 _Atomic uint32_t v_connect;
1541 _Atomic uint32_t v_holdtime;
1542 _Atomic uint32_t v_keepalive;
1543 _Atomic uint32_t v_routeadv;
1544 _Atomic uint32_t v_delayopen;
1545 _Atomic uint32_t v_pmax_restart;
1546 _Atomic uint32_t v_gr_restart;
1547
1548 /* Threads. */
1549 struct thread *t_read;
1550 struct thread *t_write;
1551 struct thread *t_start;
1552 struct thread *t_connect_check_r;
1553 struct thread *t_connect_check_w;
1554 struct thread *t_connect;
1555 struct thread *t_holdtime;
1556 struct thread *t_routeadv;
1557 struct thread *t_delayopen;
1558 struct thread *t_pmax_restart;
1559 struct thread *t_gr_restart;
1560 struct thread *t_gr_stale;
1561 struct thread *t_llgr_stale[AFI_MAX][SAFI_MAX];
1562 struct thread *t_revalidate_all[AFI_MAX][SAFI_MAX];
1563 struct thread *t_generate_updgrp_packets;
1564 struct thread *t_process_packet;
1565 struct thread *t_process_packet_error;
1566 struct thread *t_refresh_stalepath;
1567
1568 /* Thread flags. */
1569 _Atomic uint32_t thread_flags;
1570 #define PEER_THREAD_WRITES_ON (1U << 0)
1571 #define PEER_THREAD_READS_ON (1U << 1)
1572 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1573 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1574
1575 /* workqueues */
1576 struct work_queue *clear_node_queue;
1577
1578 #define PEER_TOTAL_RX(peer) \
1579 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1580 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1581 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1582 + atomic_load_explicit(&peer->refresh_in, \
1583 memory_order_relaxed) \
1584 + atomic_load_explicit(&peer->keepalive_in, \
1585 memory_order_relaxed) \
1586 + atomic_load_explicit(&peer->dynamic_cap_in, \
1587 memory_order_relaxed)
1588
1589 #define PEER_TOTAL_TX(peer) \
1590 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1591 + atomic_load_explicit(&peer->update_out, \
1592 memory_order_relaxed) \
1593 + atomic_load_explicit(&peer->notify_out, \
1594 memory_order_relaxed) \
1595 + atomic_load_explicit(&peer->refresh_out, \
1596 memory_order_relaxed) \
1597 + atomic_load_explicit(&peer->keepalive_out, \
1598 memory_order_relaxed) \
1599 + atomic_load_explicit(&peer->dynamic_cap_out, \
1600 memory_order_relaxed)
1601
1602 /* Statistics field */
1603 _Atomic uint32_t open_in; /* Open message input count */
1604 _Atomic uint32_t open_out; /* Open message output count */
1605 _Atomic uint32_t update_in; /* Update message input count */
1606 _Atomic uint32_t update_out; /* Update message ouput count */
1607 _Atomic time_t update_time; /* Update message received time. */
1608 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1609 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1610 _Atomic uint32_t notify_in; /* Notify input count */
1611 _Atomic uint32_t notify_out; /* Notify output count */
1612 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1613 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1614 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1615 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1616
1617 uint32_t stat_pfx_filter;
1618 uint32_t stat_pfx_aspath_loop;
1619 uint32_t stat_pfx_originator_loop;
1620 uint32_t stat_pfx_cluster_loop;
1621 uint32_t stat_pfx_nh_invalid;
1622 uint32_t stat_pfx_dup_withdraw;
1623 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1624
1625 /* BGP state count */
1626 uint32_t established; /* Established */
1627 uint32_t dropped; /* Dropped */
1628
1629 /* Update delay related fields */
1630 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1631 for EOR */
1632
1633 /* Syncronization list and time. */
1634 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1635 time_t synctime;
1636 /* timestamp when the last UPDATE msg was written */
1637 _Atomic time_t last_write;
1638 /* timestamp when the last msg was written */
1639 _Atomic time_t last_update;
1640
1641 /* only updated under io_mtx.
1642 * last_sendq_warn is only for ratelimiting log warning messages.
1643 */
1644 time_t last_sendq_ok, last_sendq_warn;
1645
1646 /* Notify data. */
1647 struct bgp_notify notify;
1648
1649 /* Filter structure. */
1650 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1651
1652 /*
1653 * Parallel array to filter that indicates whether each filter
1654 * originates from a peer-group or if it is config that is specific to
1655 * this individual peer. If a filter is set independent of the
1656 * peer-group the appropriate bit should be set here. If this peer is a
1657 * peer-group, this memory region should be all zeros. The assumption
1658 * is that the default state for all flags is unset. Due to filters
1659 * having a direction (e.g. in/out/...), this array has a third
1660 * dimension for storing the overrides independently per direction.
1661 *
1662 * Notes:
1663 * - if a filter for an individual peer is unset, the corresponding
1664 * override flag is unset and the peer is considered to be back in
1665 * sync with the peer-group.
1666 * - This does *not* contain the filter values, rather it contains
1667 * whether the filter in filter (struct bgp_filter) is peer-specific.
1668 */
1669 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1670 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1671 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1672 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1673 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1674 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1675 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1676
1677 /* ORF Prefix-list */
1678 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1679
1680 /* Text description of last attribute rcvd */
1681 char rcvd_attr_str[BUFSIZ];
1682
1683 /* Track if we printed the attribute in debugs */
1684 int rcvd_attr_printed;
1685
1686 /* Accepted prefix count */
1687 uint32_t pcount[AFI_MAX][SAFI_MAX];
1688
1689 /* Max prefix count. */
1690 uint32_t pmax[AFI_MAX][SAFI_MAX];
1691 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1692 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1693 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1694
1695 /* Send prefix count. */
1696 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1697
1698 /* allowas-in. */
1699 char allowas_in[AFI_MAX][SAFI_MAX];
1700
1701 /* soo */
1702 struct ecommunity *soo[AFI_MAX][SAFI_MAX];
1703
1704 /* weight */
1705 unsigned long weight[AFI_MAX][SAFI_MAX];
1706
1707 /* peer reset cause */
1708 uint8_t last_reset;
1709 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1710 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1711 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1712 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1713 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1714 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1715 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1716 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1717 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1718 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1719 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1720 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1721 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1722 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1723 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1724 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1725 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1726 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1727 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1728 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1729 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1730 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1731 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1732 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1733 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1734 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1735 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1736 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1737 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1738 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1739 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1740 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1741 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1742 #define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
1743 #define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
1744 /*
1745 * Remember to update peer_down_str in bgp_fsm.c when you add
1746 * a new value to the last_reset reason
1747 */
1748
1749 uint16_t last_reset_cause_size;
1750 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1751
1752 /* The kind of route-map Flags.*/
1753 uint16_t rmap_type;
1754 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1755 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1756 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1757 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1758 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1759 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1760 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1761 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1762 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1763
1764 /** Peer overwrite configuration. */
1765 struct bfd_session_config {
1766 /**
1767 * Manual configuration bit.
1768 *
1769 * This flag only makes sense for real peers (and not groups),
1770 * it keeps track if the user explicitly configured BFD for a
1771 * peer.
1772 */
1773 bool manual;
1774 /** Control Plane Independent. */
1775 bool cbit;
1776 /** Detection multiplier. */
1777 uint8_t detection_multiplier;
1778 /** Minimum required RX interval. */
1779 uint32_t min_rx;
1780 /** Minimum required TX interval. */
1781 uint32_t min_tx;
1782 /** Profile name. */
1783 char profile[BFD_PROFILE_NAME_LEN];
1784 /** Peer BFD session */
1785 struct bfd_session_params *session;
1786 } * bfd_config;
1787
1788 /* hostname and domainname advertised by host */
1789 char *hostname;
1790 char *domainname;
1791
1792 /* Sender side AS path loop detection. */
1793 bool as_path_loop_detection;
1794
1795 /* Extended Message Support */
1796 uint16_t max_packet_size;
1797
1798 /* Conditional advertisement */
1799 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1800 bool advmap_table_change;
1801
1802 /* set TCP max segment size */
1803 uint32_t tcp_mss;
1804
1805 /* Long-lived Graceful Restart */
1806 struct llgr_info llgr[AFI_MAX][SAFI_MAX];
1807
1808 bool shut_during_cfg;
1809
1810 QOBJ_FIELDS;
1811 };
1812 DECLARE_QOBJ_TYPE(peer);
1813
1814 /* Inherit peer attribute from peer-group. */
1815 #define PEER_ATTR_INHERIT(peer, group, attr) \
1816 ((peer)->attr = (group)->conf->attr)
1817 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1818 do { \
1819 XFREE(mt, (peer)->attr); \
1820 if ((group)->conf->attr) \
1821 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1822 else \
1823 (peer)->attr = NULL; \
1824 } while (0)
1825 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1826 do { \
1827 if ((peer)->attr) \
1828 sockunion_free((peer)->attr); \
1829 if ((group)->conf->attr) \
1830 (peer)->attr = sockunion_dup((group)->conf->attr); \
1831 else \
1832 (peer)->attr = NULL; \
1833 } while (0)
1834
1835 /* Check if suppress start/restart of sessions to peer. */
1836 #define BGP_PEER_START_SUPPRESSED(P) \
1837 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
1838 CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
1839 CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
1840 (P)->shut_during_cfg)
1841
1842 #define PEER_ROUTE_ADV_DELAY(peer) \
1843 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1844
1845 #define PEER_PASSWORD_MINLEN (1)
1846 #define PEER_PASSWORD_MAXLEN (80)
1847
1848 /* This structure's member directly points incoming packet data
1849 stream. */
1850 struct bgp_nlri {
1851 /* AFI. */
1852 uint16_t afi; /* iana_afi_t */
1853
1854 /* SAFI. */
1855 uint8_t safi; /* iana_safi_t */
1856
1857 /* Pointer to NLRI byte stream. */
1858 uint8_t *nlri;
1859
1860 /* Length of whole NLRI. */
1861 bgp_size_t length;
1862 };
1863
1864 /* BGP versions. */
1865 #define BGP_VERSION_4 4
1866
1867 /* Default BGP port number. */
1868 #define BGP_PORT_DEFAULT 179
1869
1870 /* Extended BGP Administrative Shutdown Communication */
1871 #define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
1872
1873 /* BGP minimum message size. */
1874 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1875 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1876 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1877 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1878 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1879 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1880
1881 /* BGP message types. */
1882 #define BGP_MSG_OPEN 1
1883 #define BGP_MSG_UPDATE 2
1884 #define BGP_MSG_NOTIFY 3
1885 #define BGP_MSG_KEEPALIVE 4
1886 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1887 #define BGP_MSG_CAPABILITY 6
1888 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1889
1890 /* BGP open optional parameter. */
1891 #define BGP_OPEN_OPT_AUTH 1
1892 #define BGP_OPEN_OPT_CAP 2
1893
1894 /* BGP4 attribute type codes. */
1895 #define BGP_ATTR_ORIGIN 1
1896 #define BGP_ATTR_AS_PATH 2
1897 #define BGP_ATTR_NEXT_HOP 3
1898 #define BGP_ATTR_MULTI_EXIT_DISC 4
1899 #define BGP_ATTR_LOCAL_PREF 5
1900 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1901 #define BGP_ATTR_AGGREGATOR 7
1902 #define BGP_ATTR_COMMUNITIES 8
1903 #define BGP_ATTR_ORIGINATOR_ID 9
1904 #define BGP_ATTR_CLUSTER_LIST 10
1905 #define BGP_ATTR_MP_REACH_NLRI 14
1906 #define BGP_ATTR_MP_UNREACH_NLRI 15
1907 #define BGP_ATTR_EXT_COMMUNITIES 16
1908 #define BGP_ATTR_AS4_PATH 17
1909 #define BGP_ATTR_AS4_AGGREGATOR 18
1910 #define BGP_ATTR_PMSI_TUNNEL 22
1911 #define BGP_ATTR_ENCAP 23
1912 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1913 #define BGP_ATTR_AIGP 26
1914 #define BGP_ATTR_LARGE_COMMUNITIES 32
1915 #define BGP_ATTR_OTC 35
1916 #define BGP_ATTR_PREFIX_SID 40
1917 #define BGP_ATTR_SRTE_COLOR 51
1918 #ifdef ENABLE_BGP_VNC_ATTR
1919 #define BGP_ATTR_VNC 255
1920 #endif
1921
1922 /* BGP update origin. */
1923 #define BGP_ORIGIN_IGP 0
1924 #define BGP_ORIGIN_EGP 1
1925 #define BGP_ORIGIN_INCOMPLETE 2
1926 #define BGP_ORIGIN_UNSPECIFIED 255
1927
1928 /* BGP notify message codes. */
1929 #define BGP_NOTIFY_HEADER_ERR 1
1930 #define BGP_NOTIFY_OPEN_ERR 2
1931 #define BGP_NOTIFY_UPDATE_ERR 3
1932 #define BGP_NOTIFY_HOLD_ERR 4
1933 #define BGP_NOTIFY_FSM_ERR 5
1934 #define BGP_NOTIFY_CEASE 6
1935 #define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
1936
1937 /* Subcodes for BGP Finite State Machine Error */
1938 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1939 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1940 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1941 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1942
1943 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1944
1945 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1946 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1947 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1948 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1949
1950 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1951 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1952 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1953 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1954 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1955 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1956 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1957 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1958 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1959 #define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
1960
1961 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1962 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1963 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1964 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1965 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1966 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1967 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1968 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1969 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1970 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1971 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1972 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1973
1974 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1975 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1976 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1977 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1978 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1979 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1980 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1981 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1982 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1983 #define BGP_NOTIFY_CEASE_HARD_RESET 9
1984 #define BGP_NOTIFY_CEASE_BFD_DOWN 10
1985
1986 /* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
1987 #define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
1988
1989 /* BGP route refresh optional subtypes. */
1990 #define BGP_ROUTE_REFRESH_NORMAL 0
1991 #define BGP_ROUTE_REFRESH_BORR 1
1992 #define BGP_ROUTE_REFRESH_EORR 2
1993
1994 /* BGP timers default value. */
1995 #define BGP_INIT_START_TIMER 1
1996 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1997 * version-/profile-specific values. The values here do not matter, they only
1998 * exist to provide a clear layering separation between core and CLI.
1999 */
2000 #define BGP_DEFAULT_HOLDTIME 180
2001 #define BGP_DEFAULT_KEEPALIVE 60
2002 #define BGP_DEFAULT_CONNECT_RETRY 120
2003
2004 #define BGP_DEFAULT_EBGP_ROUTEADV 0
2005 #define BGP_DEFAULT_IBGP_ROUTEADV 0
2006
2007 /* BGP RFC 4271 DelayOpenTime default value */
2008 #define BGP_DEFAULT_DELAYOPEN 120
2009
2010 /* BGP default local preference. */
2011 #define BGP_DEFAULT_LOCAL_PREF 100
2012
2013 /* BGP local-preference to send when 'bgp graceful-shutdown'
2014 * is configured */
2015 #define BGP_GSHUT_LOCAL_PREF 0
2016
2017 /* BGP default subgroup packet queue max . */
2018 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
2019
2020 /* BGP graceful restart */
2021 #define BGP_DEFAULT_RESTART_TIME 120
2022 #define BGP_DEFAULT_STALEPATH_TIME 360
2023 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
2024 #define BGP_DEFAULT_RIB_STALE_TIME 500
2025 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
2026
2027 /* BGP Long-lived Graceful Restart */
2028 #define BGP_DEFAULT_LLGR_STALE_TIME 0
2029
2030 /* BGP uptime string length. */
2031 #define BGP_UPTIME_LEN 25
2032
2033 /* Default configuration settings for bgpd. */
2034 #define BGP_VTY_PORT 2605
2035 #define BGP_DEFAULT_CONFIG "bgpd.conf"
2036
2037 /* BGP Dynamic Neighbors feature */
2038 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
2039 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
2040 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
2041
2042 /* BGP AIGP */
2043 #define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
2044 #define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
2045 #define BGP_AIGP_TLV_METRIC_LEN 11
2046 #define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
2047 #define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
2048
2049 /* Flag for peer_clear_soft(). */
2050 enum bgp_clear_type {
2051 BGP_CLEAR_SOFT_NONE,
2052 BGP_CLEAR_SOFT_OUT,
2053 BGP_CLEAR_SOFT_IN,
2054 BGP_CLEAR_SOFT_BOTH,
2055 BGP_CLEAR_SOFT_IN_ORF_PREFIX,
2056 BGP_CLEAR_MESSAGE_STATS
2057 };
2058
2059 /* Macros. */
2060 #define BGP_INPUT(P) ((P)->curr)
2061 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
2062 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
2063 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
2064
2065 /* BGP error codes. */
2066 enum bgp_create_error_code {
2067 BGP_SUCCESS = 0,
2068 BGP_CREATED = 1,
2069 BGP_ERR_INVALID_VALUE = -1,
2070 BGP_ERR_INVALID_FLAG = -2,
2071 BGP_ERR_INVALID_AS = -3,
2072 BGP_ERR_PEER_GROUP_MEMBER = -4,
2073 BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
2074 BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
2075 BGP_ERR_PEER_GROUP_MISMATCH = -7,
2076 BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
2077 BGP_ERR_AS_MISMATCH = -9,
2078 BGP_ERR_PEER_FLAG_CONFLICT = -10,
2079 BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
2080 BGP_ERR_PEER_FILTER_CONFLICT = -12,
2081 BGP_ERR_NOT_INTERNAL_PEER = -13,
2082 BGP_ERR_REMOVE_PRIVATE_AS = -14,
2083 BGP_ERR_AF_UNCONFIGURED = -15,
2084 BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
2085 BGP_ERR_INSTANCE_MISMATCH = -17,
2086 BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
2087 BGP_ERR_TCPSIG_FAILED = -20,
2088 BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
2089 BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
2090 BGP_ERR_NO_INTERFACE_CONFIG = -23,
2091 BGP_ERR_AS_OVERRIDE = -25,
2092 BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
2093 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
2094 BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
2095 BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
2096 BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
2097 BGP_ERR_PEER_SAFI_CONFLICT = -31,
2098
2099 /* BGP GR ERRORS */
2100 BGP_ERR_GR_INVALID_CMD = -32,
2101 BGP_ERR_GR_OPERATION_FAILED = -33,
2102 BGP_GR_NO_OPERATION = -34,
2103
2104 /*BGP Open Policy ERRORS */
2105 BGP_ERR_INVALID_ROLE_NAME = -35,
2106 BGP_ERR_INVALID_INTERNAL_ROLE = -36,
2107
2108 /* BGP ORR ERRORS */
2109 BGP_ERR_PEER_ORR_CONFIGURED = -37,
2110 };
2111
2112 /*
2113 * Enumeration of different policy kinds a peer can be configured with.
2114 */
2115 enum bgp_policy_type {
2116 BGP_POLICY_ROUTE_MAP,
2117 BGP_POLICY_FILTER_LIST,
2118 BGP_POLICY_PREFIX_LIST,
2119 BGP_POLICY_DISTRIBUTE_LIST,
2120 };
2121
2122 /* peer_flag_change_type. */
2123 enum peer_change_type {
2124 peer_change_none,
2125 peer_change_reset,
2126 peer_change_reset_in,
2127 peer_change_reset_out,
2128 };
2129
2130 extern struct bgp_master *bm;
2131 extern unsigned int multipath_num;
2132
2133 /* Prototypes. */
2134 extern void bgp_terminate(void);
2135 extern void bgp_reset(void);
2136 extern void bgp_zclient_reset(void);
2137 extern struct bgp *bgp_get_default(void);
2138 extern struct bgp *bgp_lookup(as_t, const char *);
2139 extern struct bgp *bgp_lookup_by_name(const char *);
2140 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
2141 extern struct bgp *bgp_get_evpn(void);
2142 extern void bgp_set_evpn(struct bgp *bgp);
2143 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
2144 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
2145 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
2146 extern void bgp_peer_conf_if_to_su_update(struct peer *);
2147 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
2148 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
2149 extern struct peer_group *peer_group_get(struct bgp *, const char *);
2150 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
2151 union sockunion *,
2152 struct peer_group *);
2153 extern struct prefix *
2154 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
2155 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
2156 struct prefix *,
2157 struct prefix **);
2158 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
2159 union sockunion *);
2160
2161 extern bool peer_orr_rrclient_check(struct peer *peer, afi_t afi, safi_t safi);
2162 /*
2163 * Peers are incredibly easy to memory leak
2164 * due to the various ways that they are actually used
2165 * Provide some functionality to debug locks and unlocks
2166 */
2167 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
2168 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
2169 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
2170 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
2171
2172 extern enum bgp_peer_sort peer_sort(struct peer *peer);
2173 extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
2174
2175 extern bool peer_active(struct peer *);
2176 extern bool peer_active_nego(struct peer *);
2177 extern bool peer_afc_received(struct peer *peer);
2178 extern bool peer_afc_advertised(struct peer *peer);
2179 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
2180 extern struct peer *peer_create(union sockunion *su, const char *conf_if,
2181 struct bgp *bgp, as_t local_as, as_t remote_as,
2182 int as_type, struct peer_group *group,
2183 bool config_node);
2184 extern struct peer *peer_create_accept(struct bgp *);
2185 extern void peer_xfer_config(struct peer *dst, struct peer *src);
2186 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
2187 json_object *json);
2188
2189 extern int bgp_config_write(struct vty *);
2190
2191 extern void bgp_master_init(struct thread_master *master, const int buffer_size,
2192 struct list *addresses);
2193
2194 extern void bgp_init(unsigned short instance);
2195 extern void bgp_pthreads_run(void);
2196 extern void bgp_pthreads_finish(void);
2197 extern void bgp_route_map_init(void);
2198 extern void bgp_session_reset(struct peer *);
2199
2200 extern int bgp_option_set(int);
2201 extern int bgp_option_unset(int);
2202 extern int bgp_option_check(int);
2203
2204 /* set the bgp no-rib option during runtime and remove installed routes */
2205 extern void bgp_option_norib_set_runtime(void);
2206
2207 /* unset the bgp no-rib option during runtime and reset all peers */
2208 extern void bgp_option_norib_unset_runtime(void);
2209
2210 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
2211 extern void bgp_instance_up(struct bgp *);
2212 extern void bgp_instance_down(struct bgp *);
2213 extern int bgp_delete(struct bgp *);
2214
2215 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
2216 vrf_id_t old_vrf_id, bool create);
2217
2218 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
2219 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
2220
2221 extern void bm_wait_for_fib_set(bool set);
2222 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
2223 extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
2224 extern void bgp_cluster_id_unset(struct bgp *bgp);
2225
2226 extern void bgp_confederation_id_set(struct bgp *bgp, as_t as);
2227 extern void bgp_confederation_id_unset(struct bgp *bgp);
2228 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
2229
2230 extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as);
2231 extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
2232
2233 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
2234 uint32_t connect_retry, uint32_t delayopen);
2235 extern void bgp_timers_unset(struct bgp *);
2236
2237 extern void bgp_default_local_preference_set(struct bgp *bgp,
2238 uint32_t local_pref);
2239 extern void bgp_default_local_preference_unset(struct bgp *bgp);
2240
2241 extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
2242 uint32_t queue_size);
2243 extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
2244
2245 extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
2246 extern void bgp_listen_limit_unset(struct bgp *bgp);
2247
2248 extern bool bgp_update_delay_active(struct bgp *);
2249 extern bool bgp_update_delay_configured(struct bgp *);
2250 extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
2251 extern void peer_as_change(struct peer *, as_t, int);
2252 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
2253 int);
2254 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
2255 extern int peer_delete(struct peer *peer);
2256 extern void peer_notify_unconfig(struct peer *peer);
2257 extern int peer_group_delete(struct peer_group *);
2258 extern int peer_group_remote_as_delete(struct peer_group *);
2259 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
2260 extern void peer_group_notify_unconfig(struct peer_group *group);
2261
2262 extern int peer_activate(struct peer *, afi_t, safi_t);
2263 extern int peer_deactivate(struct peer *, afi_t, safi_t);
2264
2265 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
2266 struct peer_group *, as_t *);
2267
2268 extern int peer_flag_set(struct peer *peer, uint64_t flag);
2269 extern int peer_flag_unset(struct peer *peer, uint64_t flag);
2270 extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
2271
2272 extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
2273 uint64_t flag);
2274 extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
2275 uint64_t flag);
2276 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
2277 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
2278 uint64_t flag);
2279 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
2280 enum peer_change_type type);
2281
2282 extern int peer_ebgp_multihop_set(struct peer *, int);
2283 extern int peer_ebgp_multihop_unset(struct peer *);
2284 extern int is_ebgp_multihop_configured(struct peer *peer);
2285
2286 extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
2287 extern int peer_role_unset(struct peer *peer);
2288
2289 extern void peer_description_set(struct peer *, const char *);
2290 extern void peer_description_unset(struct peer *);
2291
2292 extern int peer_update_source_if_set(struct peer *, const char *);
2293 extern void peer_update_source_addr_set(struct peer *peer,
2294 const union sockunion *su);
2295 extern void peer_update_source_unset(struct peer *peer);
2296
2297 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
2298 const char *rmap,
2299 struct route_map *route_map);
2300 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
2301 extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
2302 uint16_t interval, uint16_t probes);
2303 extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
2304
2305 extern void peer_port_set(struct peer *, uint16_t);
2306 extern void peer_port_unset(struct peer *);
2307
2308 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
2309 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
2310
2311 extern int peer_timers_set(struct peer *, uint32_t keepalive,
2312 uint32_t holdtime);
2313 extern int peer_timers_unset(struct peer *);
2314
2315 extern int peer_timers_connect_set(struct peer *, uint32_t);
2316 extern int peer_timers_connect_unset(struct peer *);
2317
2318 extern int peer_advertise_interval_set(struct peer *, uint32_t);
2319 extern int peer_advertise_interval_unset(struct peer *);
2320
2321 extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
2322 extern int peer_timers_delayopen_unset(struct peer *peer);
2323
2324 extern void peer_interface_set(struct peer *, const char *);
2325 extern void peer_interface_unset(struct peer *);
2326
2327 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
2328 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
2329
2330 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
2331 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
2332
2333 extern int peer_local_as_set(struct peer *, as_t, bool no_prepend,
2334 bool replace_as);
2335 extern int peer_local_as_unset(struct peer *);
2336
2337 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
2338 const char *);
2339 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
2340
2341 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
2342 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
2343
2344 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
2345 const char *name, struct route_map *route_map);
2346 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
2347
2348 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2349 const char *name,
2350 struct route_map *route_map);
2351
2352 extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
2353 const char *advertise_name,
2354 struct route_map *advertise_map,
2355 const char *condition_name,
2356 struct route_map *condition_map,
2357 bool condition);
2358
2359 extern int peer_password_set(struct peer *, const char *);
2360 extern int peer_password_unset(struct peer *);
2361
2362 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2363
2364 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2365 const char *advertise_name,
2366 struct route_map *advertise_map,
2367 const char *condition_name,
2368 struct route_map *condition_map,
2369 bool condition);
2370
2371 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2372 uint8_t, int, uint16_t, bool force);
2373 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2374
2375 extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
2376 safi_t safi);
2377 extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
2378 safi_t safi, uint32_t max);
2379 extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
2380 safi_t safi);
2381
2382 extern int peer_clear(struct peer *, struct listnode **);
2383 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2384
2385 extern int peer_ttl_security_hops_set(struct peer *, int);
2386 extern int peer_ttl_security_hops_unset(struct peer *);
2387
2388 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2389 extern void peer_tx_shutdown_message_unset(struct peer *);
2390
2391 extern void bgp_route_map_update_timer(struct thread *thread);
2392 extern const char *bgp_get_name_by_role(uint8_t role);
2393
2394 extern void bgp_route_map_terminate(void);
2395
2396 extern int peer_cmp(struct peer *p1, struct peer *p2);
2397
2398 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2399 afi_t *afi, safi_t *safi);
2400 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2401 iana_afi_t *pkt_afi,
2402 iana_safi_t *pkt_safi);
2403
2404 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2405 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2406 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2407
2408 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2409 extern void bgp_shutdown_disable(struct bgp *bgp);
2410
2411 extern void bgp_close(void);
2412 extern void bgp_free(struct bgp *);
2413 void bgp_gr_apply_running_config(void);
2414 extern int bgp_afi_safi_orr_group_set(struct bgp *bgp, afi_t afi, safi_t safi,
2415 const char *name, struct peer *primary,
2416 struct peer *secondary,
2417 struct peer *tertiary);
2418 extern int bgp_afi_safi_orr_group_unset(struct bgp *bgp, afi_t afi, safi_t safi,
2419 const char *name);
2420
2421 /* BGP GR */
2422 int bgp_global_gr_init(struct bgp *bgp);
2423 int bgp_peer_gr_init(struct peer *peer);
2424
2425
2426 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2427 do { \
2428 struct peer *peer_loop; \
2429 bool gr_router_detected = false; \
2430 struct listnode *node = {0}; \
2431 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2432 if (CHECK_FLAG(peer_loop->flags, \
2433 PEER_FLAG_GRACEFUL_RESTART)) \
2434 gr_router_detected = true; \
2435 } \
2436 if (gr_router_detected \
2437 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2438 bgp_zebra_send_capabilities(_bgp, false); \
2439 } else if (!gr_router_detected \
2440 && _bgp->present_zebra_gr_state \
2441 == ZEBRA_GR_ENABLE) { \
2442 bgp_zebra_send_capabilities(_bgp, true); \
2443 } \
2444 } while (0)
2445
2446 static inline struct bgp *bgp_lock(struct bgp *bgp)
2447 {
2448 bgp->lock++;
2449 return bgp;
2450 }
2451
2452 static inline void bgp_unlock(struct bgp *bgp)
2453 {
2454 assert(bgp->lock > 0);
2455 if (--bgp->lock == 0)
2456 bgp_free(bgp);
2457 }
2458
2459 static inline int afindex(afi_t afi, safi_t safi)
2460 {
2461 switch (afi) {
2462 case AFI_IP:
2463 switch (safi) {
2464 case SAFI_UNICAST:
2465 return BGP_AF_IPV4_UNICAST;
2466 case SAFI_MULTICAST:
2467 return BGP_AF_IPV4_MULTICAST;
2468 case SAFI_LABELED_UNICAST:
2469 return BGP_AF_IPV4_LBL_UNICAST;
2470 case SAFI_MPLS_VPN:
2471 return BGP_AF_IPV4_VPN;
2472 case SAFI_ENCAP:
2473 return BGP_AF_IPV4_ENCAP;
2474 case SAFI_FLOWSPEC:
2475 return BGP_AF_IPV4_FLOWSPEC;
2476 default:
2477 return BGP_AF_MAX;
2478 }
2479 break;
2480 case AFI_IP6:
2481 switch (safi) {
2482 case SAFI_UNICAST:
2483 return BGP_AF_IPV6_UNICAST;
2484 case SAFI_MULTICAST:
2485 return BGP_AF_IPV6_MULTICAST;
2486 case SAFI_LABELED_UNICAST:
2487 return BGP_AF_IPV6_LBL_UNICAST;
2488 case SAFI_MPLS_VPN:
2489 return BGP_AF_IPV6_VPN;
2490 case SAFI_ENCAP:
2491 return BGP_AF_IPV6_ENCAP;
2492 case SAFI_FLOWSPEC:
2493 return BGP_AF_IPV6_FLOWSPEC;
2494 default:
2495 return BGP_AF_MAX;
2496 }
2497 break;
2498 case AFI_L2VPN:
2499 switch (safi) {
2500 case SAFI_EVPN:
2501 return BGP_AF_L2VPN_EVPN;
2502 default:
2503 return BGP_AF_MAX;
2504 }
2505 default:
2506 return BGP_AF_MAX;
2507 }
2508 }
2509
2510 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2511 static inline int peer_group_active(struct peer *peer)
2512 {
2513 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2514 return 1;
2515 return 0;
2516 }
2517
2518 /* If peer is negotiated at least one address family return 1. */
2519 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2520 {
2521 if (peer->afc_nego[afi][SAFI_UNICAST]
2522 || peer->afc_nego[afi][SAFI_MULTICAST]
2523 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2524 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2525 || peer->afc_nego[afi][SAFI_ENCAP]
2526 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2527 || peer->afc_nego[afi][SAFI_EVPN])
2528 return 1;
2529 return 0;
2530 }
2531
2532 /* If at least one address family activated for group, return 1. */
2533 static inline int peer_group_af_configured(struct peer_group *group)
2534 {
2535 struct peer *peer = group->conf;
2536
2537 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2538 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2539 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2540 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2541 || peer->afc[AFI_IP6][SAFI_UNICAST]
2542 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2543 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2544 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2545 || peer->afc[AFI_IP6][SAFI_ENCAP]
2546 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2547 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2548 return 1;
2549 return 0;
2550 }
2551
2552 static inline char *timestamp_string(time_t ts)
2553 {
2554 time_t tbuf;
2555 tbuf = time(NULL) - (monotime(NULL) - ts);
2556 return ctime(&tbuf);
2557 }
2558
2559 static inline bool peer_established(struct peer *peer)
2560 {
2561 return peer->status == Established;
2562 }
2563
2564 static inline bool peer_dynamic_neighbor(struct peer *peer)
2565 {
2566 return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
2567 }
2568
2569 static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
2570 {
2571 return (peer_dynamic_neighbor(peer) &&
2572 !CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
2573 }
2574
2575 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2576 {
2577 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2578 }
2579
2580 /* Lookup VRF for BGP instance based on its type. */
2581 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2582 {
2583 struct vrf *vrf;
2584
2585 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2586 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2587 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2588 vrf = vrf_lookup_by_name(bgp->name);
2589 else
2590 vrf = NULL;
2591
2592 return vrf;
2593 }
2594
2595 static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
2596 {
2597 struct vrf *vrf;
2598 struct interface *ifp;
2599 uint32_t count = 0;
2600
2601 /* if there is one interface in the vrf which is up then it is deemed
2602 * active
2603 */
2604 vrf = bgp_vrf_lookup_by_instance_type(bgp);
2605 if (vrf == NULL)
2606 return 0;
2607 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
2608 if (strcmp(ifp->name, bgp->name) == 0)
2609 continue;
2610 if (!active || if_is_up(ifp))
2611 count++;
2612 }
2613 return count;
2614 }
2615
2616 /* Link BGP instance to VRF. */
2617 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2618 {
2619 bgp->vrf_id = vrf->vrf_id;
2620 if (vrf->info != (void *)bgp)
2621 vrf->info = (void *)bgp_lock(bgp);
2622 }
2623
2624 /* Unlink BGP instance from VRF. */
2625 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2626 {
2627 if (vrf->info == (void *)bgp) {
2628 vrf->info = NULL;
2629 bgp_unlock(bgp);
2630 }
2631 bgp->vrf_id = VRF_UNKNOWN;
2632 }
2633
2634 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2635 {
2636 /* True if either set for this instance or globally */
2637 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2638 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2639 }
2640
2641 /* For benefit of rfapi */
2642 extern struct peer *peer_new(struct bgp *bgp);
2643
2644 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2645 const char *ip_str, bool use_json);
2646 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2647 const char *name,
2648 enum bgp_instance_type inst_type);
2649
2650 /* Hooks */
2651 DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
2652 (bgp, ifp));
2653 DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
2654 DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
2655 DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
2656 DECLARE_HOOK(bgp_snmp_update_stats,
2657 (struct bgp_node *rn, struct bgp_path_info *pi, bool added),
2658 (rn, pi, added));
2659 DECLARE_HOOK(bgp_rpki_prefix_status,
2660 (struct peer * peer, struct attr *attr,
2661 const struct prefix *prefix),
2662 (peer, attr, prefix));
2663
2664 void peer_nsf_stop(struct peer *peer);
2665
2666 void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
2667 void peer_tcp_mss_unset(struct peer *peer);
2668
2669 extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
2670 safi_t safi);
2671 extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
2672 int outbound);
2673 #ifdef _FRR_ATTRIBUTE_PRINTFRR
2674 /* clang-format off */
2675 #pragma FRR printfrr_ext "%pBP" (struct peer *)
2676 /* clang-format on */
2677 #endif
2678
2679 #endif /* _QUAGGA_BGPD_H */
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