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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 "iana_afi.h"
33
34 /* For union sockunion. */
35 #include "queue.h"
36 #include "sockunion.h"
37 #include "routemap.h"
38 #include "linklist.h"
39 #include "defaults.h"
40 #include "bgp_memory.h"
41 #include "bitfield.h"
42 #include "vxlan.h"
43 #include "bgp_labelpool.h"
44 #include "bgp_addpath_types.h"
45 #include "bgp_nexthop.h"
46
47 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
48 #define BGP_PEER_MAX_HASH_SIZE 16384
49
50 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
51 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
52
53 struct update_subgroup;
54 struct bpacket;
55 struct bgp_pbr_config;
56
57 /*
58 * Allow the neighbor XXXX remote-as to take internal or external
59 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
60 * behavior
61 * in the system.
62 */
63 enum { AS_UNSPECIFIED = 0,
64 AS_SPECIFIED,
65 AS_INTERNAL,
66 AS_EXTERNAL,
67 };
68
69 /* Zebra Gracaful Restart states */
70 enum zebra_gr_mode {
71 ZEBRA_GR_DISABLE = 0,
72 ZEBRA_GR_ENABLE
73 };
74
75 /* Typedef BGP specific types. */
76 typedef uint32_t as_t;
77 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
78 typedef uint16_t bgp_size_t;
79
80 #define max(a, b) \
81 ({ \
82 __typeof__(a) _a = (a); \
83 __typeof__(b) _b = (b); \
84 _a > _b ? _a : _b; \
85 })
86
87 enum bgp_af_index {
88 BGP_AF_START,
89 BGP_AF_IPV4_UNICAST = BGP_AF_START,
90 BGP_AF_IPV4_MULTICAST,
91 BGP_AF_IPV4_VPN,
92 BGP_AF_IPV6_UNICAST,
93 BGP_AF_IPV6_MULTICAST,
94 BGP_AF_IPV6_VPN,
95 BGP_AF_IPV4_ENCAP,
96 BGP_AF_IPV6_ENCAP,
97 BGP_AF_L2VPN_EVPN,
98 BGP_AF_IPV4_LBL_UNICAST,
99 BGP_AF_IPV6_LBL_UNICAST,
100 BGP_AF_IPV4_FLOWSPEC,
101 BGP_AF_IPV6_FLOWSPEC,
102 BGP_AF_MAX
103 };
104
105 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
106
107 #define FOREACH_SAFI(safi) \
108 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
109
110 extern struct frr_pthread *bgp_pth_io;
111 extern struct frr_pthread *bgp_pth_ka;
112
113 /* BGP master for system wide configurations and variables. */
114 struct bgp_master {
115 /* BGP instance list. */
116 struct list *bgp;
117
118 /* BGP thread master. */
119 struct thread_master *master;
120
121 /* Listening sockets */
122 struct list *listen_sockets;
123
124 /* BGP port number. */
125 uint16_t port;
126
127 /* Listener address */
128 char *address;
129
130 /* The Mac table */
131 struct hash *self_mac_hash;
132
133 /* BGP start time. */
134 time_t start_time;
135
136 /* Various BGP global configuration. */
137 uint8_t options;
138 #define BGP_OPT_NO_FIB (1 << 0)
139 #define BGP_OPT_NO_LISTEN (1 << 1)
140 #define BGP_OPT_NO_ZEBRA (1 << 2)
141
142 uint64_t updgrp_idspace;
143 uint64_t subgrp_idspace;
144
145 /* timer to dampen route map changes */
146 struct thread *t_rmap_update; /* Handle route map updates */
147 uint32_t rmap_update_timer; /* Route map update timer */
148 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
149
150 /* Id space for automatic RD derivation for an EVI/VRF */
151 bitfield_t rd_idspace;
152
153 /* dynamic mpls label allocation pool */
154 struct labelpool labelpool;
155
156 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
157 struct bgp* bgp_evpn;
158
159 /* How big should we set the socket buffer size */
160 uint32_t socket_buffer;
161
162 /* EVPN multihoming */
163 struct bgp_evpn_mh_info *mh_info;
164
165 /* global update-delay timer values */
166 uint16_t v_update_delay;
167 uint16_t v_establish_wait;
168
169 uint32_t flags;
170 #define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
171
172 bool terminating; /* global flag that sigint terminate seen */
173 QOBJ_FIELDS
174 };
175 DECLARE_QOBJ_TYPE(bgp_master)
176
177 /* BGP route-map structure. */
178 struct bgp_rmap {
179 char *name;
180 struct route_map *map;
181 };
182
183 struct bgp_redist {
184 unsigned short instance;
185
186 /* BGP redistribute metric configuration. */
187 uint8_t redist_metric_flag;
188 uint32_t redist_metric;
189
190 /* BGP redistribute route-map. */
191 struct bgp_rmap rmap;
192 };
193
194 typedef enum {
195 BGP_VPN_POLICY_DIR_FROMVPN = 0,
196 BGP_VPN_POLICY_DIR_TOVPN = 1,
197 BGP_VPN_POLICY_DIR_MAX = 2
198 } vpn_policy_direction_t;
199
200 struct vpn_policy {
201 struct bgp *bgp; /* parent */
202 afi_t afi;
203 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
204 struct ecommunity *import_redirect_rtlist;
205 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
206 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
207
208 /* should be mpls_label_t? */
209 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
210 uint32_t tovpn_zebra_vrf_label_last_sent;
211 struct prefix_rd tovpn_rd;
212 struct prefix tovpn_nexthop; /* unset => set to 0 */
213 uint32_t flags;
214 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
215 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
216 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
217
218 /*
219 * If we are importing another vrf into us keep a list of
220 * vrf names that are being imported into us.
221 */
222 struct list *import_vrf;
223
224 /*
225 * if we are being exported to another vrf keep a list of
226 * vrf names that we are being exported to.
227 */
228 struct list *export_vrf;
229 };
230
231 /*
232 * Type of 'struct bgp'.
233 * - Default: The default instance
234 * - VRF: A specific (non-default) VRF
235 * - View: An instance used for route exchange
236 * The "default" instance is treated separately to simplify the code. Note
237 * that if deployed in a Multi-VRF environment, it may not exist.
238 */
239 enum bgp_instance_type {
240 BGP_INSTANCE_TYPE_DEFAULT,
241 BGP_INSTANCE_TYPE_VRF,
242 BGP_INSTANCE_TYPE_VIEW
243 };
244
245 #define BGP_SEND_EOR(bgp, afi, safi) \
246 (!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
247 && ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
248 || (bgp->gr_info[afi][safi].eor_required \
249 == bgp->gr_info[afi][safi].eor_received)))
250
251 /* BGP GR Global ds */
252
253 #define BGP_GLOBAL_GR_MODE 4
254 #define BGP_GLOBAL_GR_EVENT_CMD 4
255
256 /* Graceful restart selection deferral timer info */
257 struct graceful_restart_info {
258 /* Count of EOR message expected */
259 uint32_t eor_required;
260 /* Count of EOR received */
261 uint32_t eor_received;
262 /* Deferral Timer */
263 struct thread *t_select_deferral;
264 /* Routes Deferred */
265 uint32_t gr_deferred;
266 /* Best route select */
267 struct thread *t_route_select;
268 /* AFI, SAFI enabled */
269 bool af_enabled[AFI_MAX][SAFI_MAX];
270 /* Route update completed */
271 bool route_sync[AFI_MAX][SAFI_MAX];
272 };
273
274 enum global_mode {
275 GLOBAL_HELPER = 0, /* This is the default mode */
276 GLOBAL_GR,
277 GLOBAL_DISABLE,
278 GLOBAL_INVALID
279 };
280
281 enum global_gr_command {
282 GLOBAL_GR_CMD = 0,
283 NO_GLOBAL_GR_CMD,
284 GLOBAL_DISABLE_CMD,
285 NO_GLOBAL_DISABLE_CMD
286 };
287
288 #define BGP_GR_SUCCESS 0
289 #define BGP_GR_FAILURE 1
290
291 /* Handling of BGP link bandwidth (LB) on receiver - whether and how to
292 * do weighted ECMP. Note: This applies after multipath computation.
293 */
294 enum bgp_link_bw_handling {
295 /* Do ECMP if some paths don't have LB - default */
296 BGP_LINK_BW_ECMP,
297 /* Completely ignore LB, just do regular ECMP */
298 BGP_LINK_BW_IGNORE_BW,
299 /* Skip paths without LB, do wECMP on others */
300 BGP_LINK_BW_SKIP_MISSING,
301 /* Do wECMP with default weight for paths not having LB */
302 BGP_LINK_BW_DEFWT_4_MISSING
303 };
304
305 RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
306 RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
307
308 /* BGP instance structure. */
309 struct bgp {
310 /* AS number of this BGP instance. */
311 as_t as;
312
313 /* Name of this BGP instance. */
314 char *name;
315 char *name_pretty; /* printable "VRF|VIEW name|default" */
316
317 /* Type of instance and VRF id. */
318 enum bgp_instance_type inst_type;
319 vrf_id_t vrf_id;
320
321 /* Reference count to allow peer_delete to finish after bgp_delete */
322 int lock;
323
324 /* Self peer. */
325 struct peer *peer_self;
326
327 /* BGP peer. */
328 struct list *peer;
329 struct hash *peerhash;
330
331 /* BGP peer group. */
332 struct list *group;
333
334 /* The maximum number of BGP dynamic neighbors that can be created */
335 int dynamic_neighbors_limit;
336
337 /* The current number of BGP dynamic neighbors */
338 int dynamic_neighbors_count;
339
340 struct hash *update_groups[BGP_AF_MAX];
341
342 /*
343 * Global statistics for update groups.
344 */
345 struct {
346 uint32_t join_events;
347 uint32_t prune_events;
348 uint32_t merge_events;
349 uint32_t split_events;
350 uint32_t updgrp_switch_events;
351 uint32_t peer_refreshes_combined;
352 uint32_t adj_count;
353 uint32_t merge_checks_triggered;
354
355 uint32_t updgrps_created;
356 uint32_t updgrps_deleted;
357 uint32_t subgrps_created;
358 uint32_t subgrps_deleted;
359 } update_group_stats;
360
361 /* BGP configuration. */
362 uint16_t config;
363 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
364 #define BGP_CONFIG_CONFEDERATION (1 << 1)
365
366 /* BGP router identifier. */
367 struct in_addr router_id;
368 struct in_addr router_id_static;
369 struct in_addr router_id_zebra;
370
371 /* BGP route reflector cluster ID. */
372 struct in_addr cluster_id;
373
374 /* BGP confederation information. */
375 as_t confed_id;
376 as_t *confed_peers;
377 int confed_peers_cnt;
378
379 struct thread
380 *t_startup; /* start-up timer on only once at the beginning */
381
382 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
383 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
384 uint32_t maxmed_onstartup_value; /* Max-med value when active on
385 start-up */
386 struct thread
387 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
388 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
389
390 bool v_maxmed_admin; /* true/false if max-med administrative is on/off
391 */
392 #define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
393 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
394 */
395 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
396
397 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
398 uint32_t maxmed_value; /* Max-med value when its active */
399
400 /* BGP update delay on startup */
401 struct thread *t_update_delay;
402 struct thread *t_establish_wait;
403 uint8_t update_delay_over;
404 uint8_t main_zebra_update_hold;
405 uint8_t main_peers_update_hold;
406 uint16_t v_update_delay;
407 uint16_t v_establish_wait;
408 char update_delay_begin_time[64];
409 char update_delay_end_time[64];
410 char update_delay_zebra_resume_time[64];
411 char update_delay_peers_resume_time[64];
412 uint32_t established;
413 uint32_t restarted_peers;
414 uint32_t implicit_eors;
415 uint32_t explicit_eors;
416 #define BGP_UPDATE_DELAY_DEF 0
417 #define BGP_UPDATE_DELAY_MIN 0
418 #define BGP_UPDATE_DELAY_MAX 3600
419
420 /* Reference bandwidth for BGP link-bandwidth. Used when
421 * the LB value has to be computed based on some other
422 * factor (e.g., number of multipaths for the prefix)
423 * Value is in Mbps
424 */
425 uint32_t lb_ref_bw;
426 #define BGP_LINK_BW_REF_BW 1
427
428 /* BGP flags. */
429 uint32_t flags;
430 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
431 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
432 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
433 #define BGP_FLAG_MED_CONFED (1 << 3)
434 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
435 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
436 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
437 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
438 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
439 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
440 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
441
442 /* This flag is set when we have full BGP Graceful-Restart mode enable */
443 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
444
445 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
446 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
447 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
448 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
449 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
450 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
451 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
452 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
453 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
454 #define BGP_FLAG_DELETE_IN_PROGRESS (1 << 22)
455 #define BGP_FLAG_SELECT_DEFER_DISABLE (1 << 23)
456 #define BGP_FLAG_GR_DISABLE_EOR (1 << 24)
457 #define BGP_FLAG_EBGP_REQUIRES_POLICY (1 << 25)
458 #define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1 << 26)
459
460 /* This flag is set if the instance is in administrative shutdown */
461 #define BGP_FLAG_SHUTDOWN (1 << 27)
462 #define BGP_FLAG_SUPPRESS_FIB_PENDING (1 << 28)
463
464 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
465 [BGP_GLOBAL_GR_EVENT_CMD];
466 enum global_mode global_gr_present_state;
467
468 /* This variable stores the current Graceful Restart state of Zebra
469 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
470 */
471 enum zebra_gr_mode present_zebra_gr_state;
472
473 /* BGP Per AF flags */
474 uint16_t af_flags[AFI_MAX][SAFI_MAX];
475 #define BGP_CONFIG_DAMPENING (1 << 0)
476 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
477 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
478 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
479 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
480 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
481 /* import/export between address families */
482 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
483 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
484 /* vrf-route leaking flags */
485 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
486 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
487
488 /* BGP per AF peer count */
489 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
490
491 /* Tree for next-hop lookup cache. */
492 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
493
494 /* Tree for import-check */
495 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
496
497 struct bgp_table *connected_table[AFI_MAX];
498
499 struct hash *address_hash;
500
501 /* DB for all local tunnel-ips - used mainly for martian checks
502 Currently it only has all VxLan tunnel IPs*/
503 struct hash *tip_hash;
504
505 /* Static route configuration. */
506 struct bgp_table *route[AFI_MAX][SAFI_MAX];
507
508 /* Aggregate address configuration. */
509 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
510
511 /* BGP routing information base. */
512 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
513
514 /* BGP table route-map. */
515 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
516
517 /* BGP redistribute configuration. */
518 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
519
520 /* Allocate MPLS labels */
521 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
522
523 /* Allocate hash entries to store policy routing information
524 * The hash are used to host pbr rules somewhere.
525 * Actually, pbr will only be used by flowspec
526 * those hash elements will have relationship together as
527 * illustrated in below diagram:
528 *
529 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
530 * <----- pbr_match j <--- pbr_match_entry 1..m
531 * <----- pbr_rule k
532 *
533 * - here in BGP structure, the list of match and actions will
534 * stand for the list of ipset sets, and table_ids in the kernel
535 * - the arrow above between pbr_match and pbr_action indicate
536 * that a backpointer permits match to find the action
537 * - the arrow betwen match_entry and match is a hash list
538 * contained in match, that lists the whole set of entries
539 */
540 struct hash *pbr_match_hash;
541 struct hash *pbr_rule_hash;
542 struct hash *pbr_action_hash;
543
544 /* timer to re-evaluate neighbor default-originate route-maps */
545 struct thread *t_rmap_def_originate_eval;
546 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
547
548 /* BGP distance configuration. */
549 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
550 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
551 uint8_t distance_local[AFI_MAX][SAFI_MAX];
552
553 /* BGP default local-preference. */
554 uint32_t default_local_pref;
555
556 /* BGP default subgroup pkt queue max */
557 uint32_t default_subgroup_pkt_queue_max;
558
559 /* BGP default timer. */
560 uint32_t default_holdtime;
561 uint32_t default_keepalive;
562 uint32_t default_connect_retry;
563
564 /* BGP graceful restart */
565 uint32_t restart_time;
566 uint32_t stalepath_time;
567 uint32_t select_defer_time;
568 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
569 uint32_t rib_stale_time;
570
571 #define BGP_ROUTE_SELECT_DELAY 1
572 #define BGP_MAX_BEST_ROUTE_SELECT 10000
573 /* Maximum-paths configuration */
574 struct bgp_maxpaths_cfg {
575 uint16_t maxpaths_ebgp;
576 uint16_t maxpaths_ibgp;
577 uint16_t ibgp_flags;
578 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
579 } maxpaths[AFI_MAX][SAFI_MAX];
580
581 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
582 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
583
584 /* Automatic coalesce adjust on/off */
585 bool heuristic_coalesce;
586 /* Actual coalesce time */
587 uint32_t coalesce_time;
588
589 /* Auto-shutdown new peers */
590 bool autoshutdown;
591
592 struct bgp_addpath_bgp_data tx_addpath;
593
594 #ifdef ENABLE_BGP_VNC
595 struct rfapi_cfg *rfapi_cfg;
596 struct rfapi *rfapi;
597 #endif
598
599 /* EVPN related information */
600
601 /* EVI hash table */
602 struct hash *vnihash;
603
604 /* EVPN enable - advertise gateway macip routes */
605 int advertise_gw_macip;
606
607 /* EVPN enable - advertise local VNIs and their MACs etc. */
608 int advertise_all_vni;
609
610 /* draft-ietf-idr-deprecate-as-set-confed-set
611 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
612 */
613 bool reject_as_sets;
614
615 struct bgp_evpn_info *evpn_info;
616
617 /* EVPN - use RFC 8365 to auto-derive RT */
618 int advertise_autort_rfc8365;
619
620 /*
621 * Flooding mechanism for BUM packets for VxLAN-EVPN.
622 */
623 enum vxlan_flood_control vxlan_flood_ctrl;
624
625 /* Hash table of Import RTs to EVIs */
626 struct hash *import_rt_hash;
627
628 /* Hash table of VRF import RTs to VRFs */
629 struct hash *vrf_import_rt_hash;
630
631 /* L3-VNI corresponding to this vrf */
632 vni_t l3vni;
633
634 /* router-mac to be used in mac-ip routes for this vrf */
635 struct ethaddr rmac;
636
637 /* originator ip - to be used as NH for type-5 routes */
638 struct in_addr originator_ip;
639
640 /* SVI associated with the L3-VNI corresponding to this vrf */
641 ifindex_t l3vni_svi_ifindex;
642
643 /* RB tree of ES-VRFs */
644 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
645
646 /* vrf flags */
647 uint32_t vrf_flags;
648 #define BGP_VRF_AUTO (1 << 0)
649 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
650 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
651 #define BGP_VRF_RD_CFGD (1 << 3)
652 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
653
654 /* unique ID for auto derivation of RD for this vrf */
655 uint16_t vrf_rd_id;
656
657 /* Automatically derived RD for this VRF */
658 struct prefix_rd vrf_prd_auto;
659
660 /* RD for this VRF */
661 struct prefix_rd vrf_prd;
662
663 /* import rt list for the vrf instance */
664 struct list *vrf_import_rtl;
665
666 /* export rt list for the vrf instance */
667 struct list *vrf_export_rtl;
668
669 /* list of corresponding l2vnis (struct bgpevpn) */
670 struct list *l2vnis;
671
672 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
673 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
674
675 struct vpn_policy vpn_policy[AFI_MAX];
676
677 struct bgp_pbr_config *bgp_pbr_cfg;
678
679 /* Count of peers in established state */
680 uint32_t established_peers;
681
682 /* Weighted ECMP related config. */
683 enum bgp_link_bw_handling lb_handling;
684
685 /* Process Queue for handling routes */
686 struct work_queue *process_queue;
687
688 /* BGP Conditional advertisement */
689 uint32_t condition_filter_count;
690 struct thread *t_condition_check;
691
692 QOBJ_FIELDS
693 };
694 DECLARE_QOBJ_TYPE(bgp)
695
696 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
697 DECLARE_HOOK(bgp_inst_config_write,
698 (struct bgp *bgp, struct vty *vty),
699 (bgp, vty))
700
701 /* Thread callback information */
702 struct afi_safi_info {
703 afi_t afi;
704 safi_t safi;
705 struct bgp *bgp;
706 };
707
708 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
709
710 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
711 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
712 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
713 && bgp->vrf_id != VRF_UNKNOWN))
714
715 #define BGP_SELECT_DEFER_DISABLE(bgp) \
716 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
717
718 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
719 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING))
720
721 /* BGP peer-group support. */
722 struct peer_group {
723 /* Name of the peer-group. */
724 char *name;
725
726 /* Pointer to BGP. */
727 struct bgp *bgp;
728
729 /* Peer-group client list. */
730 struct list *peer;
731
732 /** Dynamic neighbor listening ranges */
733 struct list *listen_range[AFI_MAX];
734
735 /* Peer-group config */
736 struct peer *conf;
737 };
738
739 /* BGP Notify message format. */
740 struct bgp_notify {
741 uint8_t code;
742 uint8_t subcode;
743 char *data;
744 bgp_size_t length;
745 uint8_t *raw_data;
746 };
747
748 /* Next hop self address. */
749 struct bgp_nexthop {
750 struct interface *ifp;
751 struct in_addr v4;
752 struct in6_addr v6_global;
753 struct in6_addr v6_local;
754 };
755
756 /* BGP addpath values */
757 #define BGP_ADDPATH_RX 1
758 #define BGP_ADDPATH_TX 2
759 #define BGP_ADDPATH_ID_LEN 4
760
761 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
762
763 /* Route map direction */
764 #define RMAP_IN 0
765 #define RMAP_OUT 1
766 #define RMAP_MAX 2
767
768 #define BGP_DEFAULT_TTL 1
769 #define BGP_GTSM_HOPS_DISABLED 0
770 #define BGP_GTSM_HOPS_CONNECTED 1
771
772 /* Advertise map */
773 #define CONDITION_NON_EXIST false
774 #define CONDITION_EXIST true
775
776 enum update_type { WITHDRAW, ADVERTISE };
777
778 #include "filter.h"
779
780 /* BGP filter structure. */
781 struct bgp_filter {
782 /* Distribute-list. */
783 struct {
784 char *name;
785 struct access_list *alist;
786 } dlist[FILTER_MAX];
787
788 /* Prefix-list. */
789 struct {
790 char *name;
791 struct prefix_list *plist;
792 } plist[FILTER_MAX];
793
794 /* Filter-list. */
795 struct {
796 char *name;
797 struct as_list *aslist;
798 } aslist[FILTER_MAX];
799
800 /* Route-map. */
801 struct {
802 char *name;
803 struct route_map *map;
804 } map[RMAP_MAX];
805
806 /* Unsuppress-map. */
807 struct {
808 char *name;
809 struct route_map *map;
810 } usmap;
811
812 /* Advertise-map */
813 struct {
814 char *aname;
815 struct route_map *amap;
816
817 bool condition;
818
819 char *cname;
820 struct route_map *cmap;
821
822 enum update_type update_type;
823 } advmap;
824 };
825
826 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
827 a peer who's AS is part of our Confederation. */
828 typedef enum {
829 BGP_PEER_UNSPECIFIED,
830 BGP_PEER_IBGP,
831 BGP_PEER_EBGP,
832 BGP_PEER_INTERNAL,
833 BGP_PEER_CONFED,
834 } bgp_peer_sort_t;
835
836 /* BGP message header and packet size. */
837 #define BGP_MARKER_SIZE 16
838 #define BGP_HEADER_SIZE 19
839 #define BGP_MAX_PACKET_SIZE 4096
840 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
841
842 /*
843 * Trigger delay for bgp_announce_route().
844 */
845 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
846 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
847
848 struct peer_af {
849 /* back pointer to the peer */
850 struct peer *peer;
851
852 /* which subgroup the peer_af belongs to */
853 struct update_subgroup *subgroup;
854
855 /* for being part of an update subgroup's peer list */
856 LIST_ENTRY(peer_af) subgrp_train;
857
858 /* for being part of a packet's peer list */
859 LIST_ENTRY(peer_af) pkt_train;
860
861 struct bpacket *next_pkt_to_send;
862
863 /*
864 * Trigger timer for bgp_announce_route().
865 */
866 struct thread *t_announce_route;
867
868 afi_t afi;
869 safi_t safi;
870 int afid;
871 };
872 /* BGP GR per peer ds */
873
874 #define BGP_PEER_GR_MODE 5
875 #define BGP_PEER_GR_EVENT_CMD 6
876
877 enum peer_mode {
878 PEER_HELPER = 0,
879 PEER_GR,
880 PEER_DISABLE,
881 PEER_INVALID,
882 PEER_GLOBAL_INHERIT /* This is the default mode */
883
884 };
885
886 enum peer_gr_command {
887 PEER_GR_CMD = 0,
888 NO_PEER_GR_CMD,
889 PEER_DISABLE_CMD,
890 NO_PEER_DISABLE_CMD,
891 PEER_HELPER_CMD,
892 NO_PEER_HELPER_CMD
893 };
894
895 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
896
897 struct bgp_peer_gr {
898 enum peer_mode next_state;
899 bgp_peer_gr_action_ptr action_fun;
900 };
901
902 /* BGP finite state machine events. */
903 enum bgp_fsm_events {
904 BGP_Start = 1,
905 BGP_Stop,
906 TCP_connection_open,
907 TCP_connection_closed,
908 TCP_connection_open_failed,
909 TCP_fatal_error,
910 ConnectRetry_timer_expired,
911 Hold_Timer_expired,
912 KeepAlive_timer_expired,
913 Receive_OPEN_message,
914 Receive_KEEPALIVE_message,
915 Receive_UPDATE_message,
916 Receive_NOTIFICATION_message,
917 Clearing_Completed,
918 BGP_EVENTS_MAX,
919 };
920
921 /* BGP finite state machine status. */
922 enum bgp_fsm_status {
923 Idle = 1,
924 Connect,
925 Active,
926 OpenSent,
927 OpenConfirm,
928 Established,
929 Clearing,
930 Deleted,
931 BGP_STATUS_MAX,
932 };
933
934 /* BGP neighbor structure. */
935 struct peer {
936 /* BGP structure. */
937 struct bgp *bgp;
938
939 /* reference count, primarily to allow bgp_process'ing of route_node's
940 * to be done after a struct peer is deleted.
941 *
942 * named 'lock' for hysterical reasons within Quagga.
943 */
944 int lock;
945
946 /* BGP peer group. */
947 struct peer_group *group;
948 uint64_t version[AFI_MAX][SAFI_MAX];
949
950 /* BGP peer_af structures, per configured AF on this peer */
951 struct peer_af *peer_af_array[BGP_AF_MAX];
952
953 /* Peer's remote AS number. */
954 int as_type;
955 as_t as;
956
957 /* Peer's local AS number. */
958 as_t local_as;
959
960 bgp_peer_sort_t sort;
961
962 /* Peer's Change local AS number. */
963 as_t change_local_as;
964
965 /* Remote router ID. */
966 struct in_addr remote_id;
967
968 /* Local router ID. */
969 struct in_addr local_id;
970
971 /* Packet receive and send buffer. */
972 pthread_mutex_t io_mtx; // guards ibuf, obuf
973 struct stream_fifo *ibuf; // packets waiting to be processed
974 struct stream_fifo *obuf; // packets waiting to be written
975
976 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
977 struct stream *obuf_work; // WiP buffer used to construct packets
978
979 struct stream *curr; // the current packet being parsed
980
981 /* We use a separate stream to encode MP_REACH_NLRI for efficient
982 * NLRI packing. peer->obuf_work stores all the other attributes. The
983 * actual packet is then constructed by concatenating the two.
984 */
985 struct stream *scratch;
986
987 /* the doppelganger peer structure, due to dual TCP conn setup */
988 struct peer *doppelganger;
989
990 /* Status of the peer. */
991 enum bgp_fsm_status status;
992 enum bgp_fsm_status ostatus;
993
994 /* FSM events, stored for debug purposes.
995 * Note: uchar used for reduced memory usage.
996 */
997 enum bgp_fsm_events cur_event;
998 enum bgp_fsm_events last_event;
999 enum bgp_fsm_events last_major_event;
1000
1001 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1002 uint16_t table_dump_index;
1003
1004 /* Peer information */
1005 int fd; /* File descriptor */
1006 int ttl; /* TTL of TCP connection to the peer. */
1007 int rtt; /* Estimated round-trip-time from TCP_INFO */
1008 int rtt_expected; /* Expected round-trip-time for a peer */
1009 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1010 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1011 int gtsm_hops; /* minimum hopcount to peer */
1012 char *desc; /* Description of the peer. */
1013 unsigned short port; /* Destination port for peer */
1014 char *host; /* Printable address of the peer. */
1015 union sockunion su; /* Sockunion address of the peer. */
1016 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1017 time_t uptime; /* Last Up/Down time */
1018 time_t readtime; /* Last read time */
1019 time_t resettime; /* Last reset time */
1020
1021 char *conf_if; /* neighbor interface config name. */
1022 struct interface *ifp; /* corresponding interface */
1023 char *ifname; /* bind interface name. */
1024 char *update_if;
1025 union sockunion *update_source;
1026
1027 union sockunion *su_local; /* Sockunion of local address. */
1028 union sockunion *su_remote; /* Sockunion of remote address. */
1029 int shared_network; /* Is this peer shared same network. */
1030 struct bgp_nexthop nexthop; /* Nexthop */
1031
1032 /* Peer address family configuration. */
1033 uint8_t afc[AFI_MAX][SAFI_MAX];
1034 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1035 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1036 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1037
1038 /* Capability flags (reset in bgp_stop) */
1039 uint32_t cap;
1040 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1041 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1042 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1043 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1044 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1045 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1046 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1047 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1048 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1049 #define PEER_CAP_RESTART_BIT_ADV (1U << 9) /* sent restart state */
1050 #define PEER_CAP_RESTART_BIT_RCV (1U << 10) /* peer restart state */
1051 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1052 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1053 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1054 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1055 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1056 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1057
1058 /* Capability flags (reset in bgp_stop) */
1059 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1060 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1061 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1062 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1063 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1064 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1065 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1066 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1067 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1068 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1069 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1070 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1071 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1072 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1073 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1074 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1075
1076 /* Global configuration flags. */
1077 /*
1078 * Parallel array to flags that indicates whether each flag originates
1079 * from a peer-group or if it is config that is specific to this
1080 * individual peer. If a flag is set independent of the peer-group, the
1081 * same bit should be set here. If this peer is a peer-group, this
1082 * memory region should be all zeros.
1083 *
1084 * The assumption is that the default state for all flags is unset,
1085 * so if a flag is unset, the corresponding override flag is unset too.
1086 * However if a flag is set, the corresponding override flag is set.
1087 */
1088 uint32_t flags_override;
1089 /*
1090 * Parallel array to flags that indicates whether the default behavior
1091 * of *flags_override* should be inverted. If a flag is unset and the
1092 * corresponding invert flag is set, the corresponding override flag
1093 * would be set. However if a flag is set and the corresponding invert
1094 * flag is unset, the corresponding override flag would be unset.
1095 *
1096 * This can be used for attributes like *send-community*, which are
1097 * implicitely enabled and have to be disabled explicitely, compared to
1098 * 'normal' attributes like *next-hop-self* which are implicitely set.
1099 *
1100 * All operations dealing with flags should apply the following boolean
1101 * logic to keep the internal flag system in a sane state:
1102 *
1103 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1104 * value=0 invert=1 Unset flag unconditionally
1105 * value=1 invert=0 Set flag unconditionally
1106 * value=1 invert=1 Inherit flag if member, otherwise set flag
1107 *
1108 * Contrary to the implementation of *flags_override*, the flag
1109 * inversion state can be set either on the peer OR the peer *and* the
1110 * peer-group. This was done on purpose, as the inversion state of a
1111 * flag can be determined on either the peer or the peer-group.
1112 *
1113 * Example: Enabling the cisco configuration mode inverts all flags
1114 * related to *send-community* unconditionally for both peer-groups and
1115 * peers.
1116 *
1117 * This behavior is different for interface peers though, which enable
1118 * the *extended-nexthop* flag by default, which regular peers do not.
1119 * As the peer-group can contain both regular and interface peers, the
1120 * flag inversion state must be set on the peer only.
1121 *
1122 * When a peer inherits the configuration from a peer-group and the
1123 * inversion state of the flag differs between peer and peer-group, the
1124 * newly set value must equal to the inverted state of the peer-group.
1125 */
1126 uint32_t flags_invert;
1127 /*
1128 * Effective array for storing the peer/peer-group flags. In case of a
1129 * peer-group, the peer-specific overrides (see flags_override and
1130 * flags_invert) must be respected.
1131 */
1132 uint32_t flags;
1133 #define PEER_FLAG_PASSIVE (1U << 0) /* passive mode */
1134 #define PEER_FLAG_SHUTDOWN (1U << 1) /* shutdown */
1135 #define PEER_FLAG_DONT_CAPABILITY (1U << 2) /* dont-capability */
1136 #define PEER_FLAG_OVERRIDE_CAPABILITY (1U << 3) /* override-capability */
1137 #define PEER_FLAG_STRICT_CAP_MATCH (1U << 4) /* strict-match */
1138 #define PEER_FLAG_DYNAMIC_CAPABILITY (1U << 5) /* dynamic capability */
1139 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1U << 6) /* disable-connected-check */
1140 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1U << 7) /* local-as no-prepend */
1141 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1U << 8) /* local-as no-prepend replace-as */
1142 #define PEER_FLAG_DELETE (1U << 9) /* mark the peer for deleting */
1143 #define PEER_FLAG_CONFIG_NODE (1U << 10) /* the node to update configs on */
1144 #define PEER_FLAG_LONESOUL (1U << 11)
1145 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1U << 12) /* dynamic neighbor */
1146 #define PEER_FLAG_CAPABILITY_ENHE (1U << 13) /* Extended next-hop (rfc 5549)*/
1147 #define PEER_FLAG_IFPEER_V6ONLY (1U << 14) /* if-based peer is v6 only */
1148 #define PEER_FLAG_IS_RFAPI_HD (1U << 15) /* attached to rfapi HD */
1149 #define PEER_FLAG_ENFORCE_FIRST_AS (1U << 16) /* enforce-first-as */
1150 #define PEER_FLAG_ROUTEADV (1U << 17) /* route advertise */
1151 #define PEER_FLAG_TIMER (1U << 18) /* keepalive & holdtime */
1152 #define PEER_FLAG_TIMER_CONNECT (1U << 19) /* connect timer */
1153 #define PEER_FLAG_PASSWORD (1U << 20) /* password */
1154 #define PEER_FLAG_LOCAL_AS (1U << 21) /* local-as */
1155 #define PEER_FLAG_UPDATE_SOURCE (1U << 22) /* update-source */
1156
1157 /* BGP-GR Peer related flags */
1158 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1U << 23) /* Helper */
1159 #define PEER_FLAG_GRACEFUL_RESTART (1U << 24) /* Graceful Restart */
1160 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1U << 25) /* Global-Inherit */
1161 #define PEER_FLAG_RTT_SHUTDOWN (1U << 26) /* shutdown rtt */
1162
1163 /*
1164 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1165 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1166 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1167 */
1168
1169 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1170 enum peer_mode peer_gr_present_state;
1171 /* Non stop forwarding afi-safi count for BGP gr feature*/
1172 uint8_t nsf_af_count;
1173
1174 uint8_t peer_gr_new_status_flag;
1175 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1176 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1177 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1178
1179 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1180 char *tx_shutdown_message;
1181
1182 /* NSF mode (graceful restart) */
1183 uint8_t nsf[AFI_MAX][SAFI_MAX];
1184 /* EOR Send time */
1185 time_t eor_stime[AFI_MAX][SAFI_MAX];
1186 /* Last update packet sent time */
1187 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1188
1189 /* Peer Per AF flags */
1190 /*
1191 * Please consult the comments for *flags_override*, *flags_invert* and
1192 * *flags* to understand what these three arrays do. The address-family
1193 * specific attributes are being treated the exact same way as global
1194 * peer attributes.
1195 */
1196 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
1197 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
1198 uint32_t af_flags[AFI_MAX][SAFI_MAX];
1199 #define PEER_FLAG_SEND_COMMUNITY (1U << 0) /* send-community */
1200 #define PEER_FLAG_SEND_EXT_COMMUNITY (1U << 1) /* send-community ext. */
1201 #define PEER_FLAG_NEXTHOP_SELF (1U << 2) /* next-hop-self */
1202 #define PEER_FLAG_REFLECTOR_CLIENT (1U << 3) /* reflector-client */
1203 #define PEER_FLAG_RSERVER_CLIENT (1U << 4) /* route-server-client */
1204 #define PEER_FLAG_SOFT_RECONFIG (1U << 5) /* soft-reconfiguration */
1205 #define PEER_FLAG_AS_PATH_UNCHANGED (1U << 6) /* transparent-as */
1206 #define PEER_FLAG_NEXTHOP_UNCHANGED (1U << 7) /* transparent-next-hop */
1207 #define PEER_FLAG_MED_UNCHANGED (1U << 8) /* transparent-next-hop */
1208 #define PEER_FLAG_DEFAULT_ORIGINATE (1U << 9) /* default-originate */
1209 #define PEER_FLAG_REMOVE_PRIVATE_AS (1U << 10) /* remove-private-as */
1210 #define PEER_FLAG_ALLOWAS_IN (1U << 11) /* set allowas-in */
1211 #define PEER_FLAG_ORF_PREFIX_SM (1U << 12) /* orf capability send-mode */
1212 #define PEER_FLAG_ORF_PREFIX_RM (1U << 13) /* orf capability receive-mode */
1213 #define PEER_FLAG_MAX_PREFIX (1U << 14) /* maximum prefix */
1214 #define PEER_FLAG_MAX_PREFIX_WARNING (1U << 15) /* maximum prefix warning-only */
1215 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1U << 16) /* leave link-local nexthop unchanged */
1216 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1U << 17) /* next-hop-self force */
1217 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1U << 18) /* remove-private-as all */
1218 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1U << 19) /* remove-private-as replace-as */
1219 #define PEER_FLAG_AS_OVERRIDE (1U << 20) /* as-override */
1220 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1U << 21) /* remove-private-as all replace-as */
1221 #define PEER_FLAG_WEIGHT (1U << 24) /* weight */
1222 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1U << 25) /* allowas-in origin */
1223 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1U << 26) /* Send large Communities */
1224 #define PEER_FLAG_MAX_PREFIX_OUT (1U << 27) /* outgoing maximum prefix */
1225 #define PEER_FLAG_MAX_PREFIX_FORCE (1U << 28) /* maximum-prefix <num> force */
1226
1227 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1228
1229 /* MD5 password */
1230 char *password;
1231
1232 /* default-originate route-map. */
1233 struct {
1234 char *name;
1235 struct route_map *map;
1236 } default_rmap[AFI_MAX][SAFI_MAX];
1237
1238 /* Peer status flags. */
1239 uint16_t sflags;
1240 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1241 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1242 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1243 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1244 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1245 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1246 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1247
1248 /* Peer status af flags (reset in bgp_stop) */
1249 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1250 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1251 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1252 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1253 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1254 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1255 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1256
1257 /* Configured timer values. */
1258 _Atomic uint32_t holdtime;
1259 _Atomic uint32_t keepalive;
1260 _Atomic uint32_t connect;
1261 _Atomic uint32_t routeadv;
1262
1263 /* Timer values. */
1264 _Atomic uint32_t v_start;
1265 _Atomic uint32_t v_connect;
1266 _Atomic uint32_t v_holdtime;
1267 _Atomic uint32_t v_keepalive;
1268 _Atomic uint32_t v_routeadv;
1269 _Atomic uint32_t v_pmax_restart;
1270 _Atomic uint32_t v_gr_restart;
1271
1272 /* Threads. */
1273 struct thread *t_read;
1274 struct thread *t_write;
1275 struct thread *t_start;
1276 struct thread *t_connect_check_r;
1277 struct thread *t_connect_check_w;
1278 struct thread *t_connect;
1279 struct thread *t_holdtime;
1280 struct thread *t_routeadv;
1281 struct thread *t_pmax_restart;
1282 struct thread *t_gr_restart;
1283 struct thread *t_gr_stale;
1284 struct thread *t_generate_updgrp_packets;
1285 struct thread *t_process_packet;
1286
1287 /* Thread flags. */
1288 _Atomic uint32_t thread_flags;
1289 #define PEER_THREAD_WRITES_ON (1U << 0)
1290 #define PEER_THREAD_READS_ON (1U << 1)
1291 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1292 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1293
1294 /* workqueues */
1295 struct work_queue *clear_node_queue;
1296
1297 #define PEER_TOTAL_RX(peer) \
1298 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1299 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1300 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1301 + atomic_load_explicit(&peer->refresh_in, \
1302 memory_order_relaxed) \
1303 + atomic_load_explicit(&peer->keepalive_in, \
1304 memory_order_relaxed) \
1305 + atomic_load_explicit(&peer->dynamic_cap_in, \
1306 memory_order_relaxed)
1307
1308 #define PEER_TOTAL_TX(peer) \
1309 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1310 + atomic_load_explicit(&peer->update_out, \
1311 memory_order_relaxed) \
1312 + atomic_load_explicit(&peer->notify_out, \
1313 memory_order_relaxed) \
1314 + atomic_load_explicit(&peer->refresh_out, \
1315 memory_order_relaxed) \
1316 + atomic_load_explicit(&peer->keepalive_out, \
1317 memory_order_relaxed) \
1318 + atomic_load_explicit(&peer->dynamic_cap_out, \
1319 memory_order_relaxed)
1320
1321 /* Statistics field */
1322 _Atomic uint32_t open_in; /* Open message input count */
1323 _Atomic uint32_t open_out; /* Open message output count */
1324 _Atomic uint32_t update_in; /* Update message input count */
1325 _Atomic uint32_t update_out; /* Update message ouput count */
1326 _Atomic time_t update_time; /* Update message received time. */
1327 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1328 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1329 _Atomic uint32_t notify_in; /* Notify input count */
1330 _Atomic uint32_t notify_out; /* Notify output count */
1331 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1332 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1333 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1334 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1335
1336 uint32_t stat_pfx_filter;
1337 uint32_t stat_pfx_aspath_loop;
1338 uint32_t stat_pfx_originator_loop;
1339 uint32_t stat_pfx_cluster_loop;
1340 uint32_t stat_pfx_nh_invalid;
1341 uint32_t stat_pfx_dup_withdraw;
1342 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1343
1344 /* BGP state count */
1345 uint32_t established; /* Established */
1346 uint32_t dropped; /* Dropped */
1347
1348 /* Update delay related fields */
1349 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1350 for EOR */
1351
1352 /* Syncronization list and time. */
1353 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1354 time_t synctime;
1355 /* timestamp when the last UPDATE msg was written */
1356 _Atomic time_t last_write;
1357 /* timestamp when the last msg was written */
1358 _Atomic time_t last_update;
1359
1360 /* Notify data. */
1361 struct bgp_notify notify;
1362
1363 /* Filter structure. */
1364 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1365
1366 /*
1367 * Parallel array to filter that indicates whether each filter
1368 * originates from a peer-group or if it is config that is specific to
1369 * this individual peer. If a filter is set independent of the
1370 * peer-group the appropriate bit should be set here. If this peer is a
1371 * peer-group, this memory region should be all zeros. The assumption
1372 * is that the default state for all flags is unset. Due to filters
1373 * having a direction (e.g. in/out/...), this array has a third
1374 * dimension for storing the overrides independently per direction.
1375 *
1376 * Notes:
1377 * - if a filter for an individual peer is unset, the corresponding
1378 * override flag is unset and the peer is considered to be back in
1379 * sync with the peer-group.
1380 * - This does *not* contain the filter values, rather it contains
1381 * whether the filter in filter (struct bgp_filter) is peer-specific.
1382 */
1383 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1384 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1385 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1386 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1387 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1388 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1389 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1390
1391 /* ORF Prefix-list */
1392 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1393
1394 /* Text description of last attribute rcvd */
1395 char rcvd_attr_str[BUFSIZ];
1396
1397 /* Track if we printed the attribute in debugs */
1398 int rcvd_attr_printed;
1399
1400 /* Accepted prefix count */
1401 uint32_t pcount[AFI_MAX][SAFI_MAX];
1402
1403 /* Max prefix count. */
1404 uint32_t pmax[AFI_MAX][SAFI_MAX];
1405 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1406 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1407 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1408
1409 /* Send prefix count. */
1410 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1411
1412 /* allowas-in. */
1413 char allowas_in[AFI_MAX][SAFI_MAX];
1414
1415 /* weight */
1416 unsigned long weight[AFI_MAX][SAFI_MAX];
1417
1418 /* peer reset cause */
1419 uint8_t last_reset;
1420 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1421 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1422 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1423 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1424 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1425 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1426 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1427 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1428 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1429 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1430 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1431 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1432 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1433 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1434 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1435 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1436 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1437 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1438 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1439 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1440 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1441 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1442 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1443 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1444 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1445 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1446 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1447 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1448 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1449 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1450 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1451 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1452 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1453 /*
1454 * Remember to update peer_down_str in bgp_fsm.c when you add
1455 * a new value to the last_reset reason
1456 */
1457
1458 size_t last_reset_cause_size;
1459 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1460
1461 /* The kind of route-map Flags.*/
1462 uint16_t rmap_type;
1463 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1464 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1465 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1466 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1467 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1468 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1469 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1470 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1471 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1472
1473 /* peer specific BFD information */
1474 struct bfd_info *bfd_info;
1475
1476 /* hostname and domainname advertised by host */
1477 char *hostname;
1478 char *domainname;
1479
1480 /* Sender side AS path loop detection. */
1481 bool as_path_loop_detection;
1482
1483 /* Conditional advertisement */
1484 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1485 bool advmap_table_change;
1486
1487 QOBJ_FIELDS
1488 };
1489 DECLARE_QOBJ_TYPE(peer)
1490
1491 /* Inherit peer attribute from peer-group. */
1492 #define PEER_ATTR_INHERIT(peer, group, attr) \
1493 ((peer)->attr = (group)->conf->attr)
1494 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1495 do { \
1496 XFREE(mt, (peer)->attr); \
1497 if ((group)->conf->attr) \
1498 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1499 else \
1500 (peer)->attr = NULL; \
1501 } while (0)
1502 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1503 do { \
1504 if ((peer)->attr) \
1505 sockunion_free((peer)->attr); \
1506 if ((group)->conf->attr) \
1507 (peer)->attr = sockunion_dup((group)->conf->attr); \
1508 else \
1509 (peer)->attr = NULL; \
1510 } while (0)
1511
1512 /* Check if suppress start/restart of sessions to peer. */
1513 #define BGP_PEER_START_SUPPRESSED(P) \
1514 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1515 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) \
1516 || CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN))
1517
1518 #define PEER_ROUTE_ADV_DELAY(peer) \
1519 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1520
1521 #define PEER_PASSWORD_MINLEN (1)
1522 #define PEER_PASSWORD_MAXLEN (80)
1523
1524 /* This structure's member directly points incoming packet data
1525 stream. */
1526 struct bgp_nlri {
1527 /* AFI. */
1528 uint16_t afi; /* iana_afi_t */
1529
1530 /* SAFI. */
1531 uint8_t safi; /* iana_safi_t */
1532
1533 /* Pointer to NLRI byte stream. */
1534 uint8_t *nlri;
1535
1536 /* Length of whole NLRI. */
1537 bgp_size_t length;
1538 };
1539
1540 /* BGP versions. */
1541 #define BGP_VERSION_4 4
1542
1543 /* Default BGP port number. */
1544 #define BGP_PORT_DEFAULT 179
1545
1546 /* BGP minimum message size. */
1547 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1548 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1549 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1550 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1551 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1552 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1553
1554 /* BGP message types. */
1555 #define BGP_MSG_OPEN 1
1556 #define BGP_MSG_UPDATE 2
1557 #define BGP_MSG_NOTIFY 3
1558 #define BGP_MSG_KEEPALIVE 4
1559 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1560 #define BGP_MSG_CAPABILITY 6
1561 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1562
1563 /* BGP open optional parameter. */
1564 #define BGP_OPEN_OPT_AUTH 1
1565 #define BGP_OPEN_OPT_CAP 2
1566
1567 /* BGP4 attribute type codes. */
1568 #define BGP_ATTR_ORIGIN 1
1569 #define BGP_ATTR_AS_PATH 2
1570 #define BGP_ATTR_NEXT_HOP 3
1571 #define BGP_ATTR_MULTI_EXIT_DISC 4
1572 #define BGP_ATTR_LOCAL_PREF 5
1573 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1574 #define BGP_ATTR_AGGREGATOR 7
1575 #define BGP_ATTR_COMMUNITIES 8
1576 #define BGP_ATTR_ORIGINATOR_ID 9
1577 #define BGP_ATTR_CLUSTER_LIST 10
1578 #define BGP_ATTR_DPA 11
1579 #define BGP_ATTR_ADVERTISER 12
1580 #define BGP_ATTR_RCID_PATH 13
1581 #define BGP_ATTR_MP_REACH_NLRI 14
1582 #define BGP_ATTR_MP_UNREACH_NLRI 15
1583 #define BGP_ATTR_EXT_COMMUNITIES 16
1584 #define BGP_ATTR_AS4_PATH 17
1585 #define BGP_ATTR_AS4_AGGREGATOR 18
1586 #define BGP_ATTR_AS_PATHLIMIT 21
1587 #define BGP_ATTR_PMSI_TUNNEL 22
1588 #define BGP_ATTR_ENCAP 23
1589 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1590 #define BGP_ATTR_LARGE_COMMUNITIES 32
1591 #define BGP_ATTR_PREFIX_SID 40
1592 #define BGP_ATTR_SRTE_COLOR 51
1593 #ifdef ENABLE_BGP_VNC_ATTR
1594 #define BGP_ATTR_VNC 255
1595 #endif
1596
1597 /* BGP update origin. */
1598 #define BGP_ORIGIN_IGP 0
1599 #define BGP_ORIGIN_EGP 1
1600 #define BGP_ORIGIN_INCOMPLETE 2
1601 #define BGP_ORIGIN_UNSPECIFIED 255
1602
1603 /* BGP notify message codes. */
1604 #define BGP_NOTIFY_HEADER_ERR 1
1605 #define BGP_NOTIFY_OPEN_ERR 2
1606 #define BGP_NOTIFY_UPDATE_ERR 3
1607 #define BGP_NOTIFY_HOLD_ERR 4
1608 #define BGP_NOTIFY_FSM_ERR 5
1609 #define BGP_NOTIFY_CEASE 6
1610 #define BGP_NOTIFY_CAPABILITY_ERR 7
1611
1612 /* Subcodes for BGP Finite State Machine Error */
1613 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1614 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1615 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1616 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1617
1618 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1619
1620 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1621 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1622 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1623 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1624
1625 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1626 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1627 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1628 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1629 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1630 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1631 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1632 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1633 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1634
1635 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1636 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1637 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1638 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1639 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1640 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1641 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1642 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1643 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1644 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1645 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1646 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1647
1648 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1649 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1650 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1651 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1652 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1653 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1654 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1655 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1656 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1657
1658 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1659 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1660 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1661 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1662
1663 /* BGP timers default value. */
1664 #define BGP_INIT_START_TIMER 1
1665 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1666 * version-/profile-specific values. The values here do not matter, they only
1667 * exist to provide a clear layering separation between core and CLI.
1668 */
1669 #define BGP_DEFAULT_HOLDTIME 180
1670 #define BGP_DEFAULT_KEEPALIVE 60
1671 #define BGP_DEFAULT_CONNECT_RETRY 120
1672
1673 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1674 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1675
1676 /* BGP default local preference. */
1677 #define BGP_DEFAULT_LOCAL_PREF 100
1678
1679 /* BGP local-preference to send when 'bgp graceful-shutdown'
1680 * is configured */
1681 #define BGP_GSHUT_LOCAL_PREF 0
1682
1683 /* BGP default subgroup packet queue max . */
1684 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1685
1686 /* BGP graceful restart */
1687 #define BGP_DEFAULT_RESTART_TIME 120
1688 #define BGP_DEFAULT_STALEPATH_TIME 360
1689 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1690 #define BGP_DEFAULT_RIB_STALE_TIME 500
1691 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
1692
1693 /* BGP uptime string length. */
1694 #define BGP_UPTIME_LEN 25
1695
1696 /* Default configuration settings for bgpd. */
1697 #define BGP_VTY_PORT 2605
1698 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1699
1700 /* BGP Dynamic Neighbors feature */
1701 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1702 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1703 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1704
1705 /* Flag for peer_clear_soft(). */
1706 enum bgp_clear_type {
1707 BGP_CLEAR_SOFT_NONE,
1708 BGP_CLEAR_SOFT_OUT,
1709 BGP_CLEAR_SOFT_IN,
1710 BGP_CLEAR_SOFT_BOTH,
1711 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1712 };
1713
1714 /* Macros. */
1715 #define BGP_INPUT(P) ((P)->curr)
1716 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1717 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1718 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1719
1720 /* BGP error codes. */
1721 #define BGP_SUCCESS 0
1722 #define BGP_CREATED 1
1723 #define BGP_ERR_INVALID_VALUE -1
1724 #define BGP_ERR_INVALID_FLAG -2
1725 #define BGP_ERR_INVALID_AS -3
1726 #define BGP_ERR_INVALID_BGP -4
1727 #define BGP_ERR_PEER_GROUP_MEMBER -5
1728 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1729 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1730 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1731 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1732 #define BGP_ERR_AS_MISMATCH -12
1733 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1734 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1735 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1736 #define BGP_ERR_NOT_INTERNAL_PEER -16
1737 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1738 #define BGP_ERR_AF_UNCONFIGURED -18
1739 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1740 #define BGP_ERR_INSTANCE_MISMATCH -20
1741 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1742 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1743 #define BGP_ERR_TCPSIG_FAILED -23
1744 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1745 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1746 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1747 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1748 #define BGP_ERR_AS_OVERRIDE -28
1749 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1750 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1751 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1752 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1753 #define BGP_ERR_MAX -33
1754 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1755 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1756
1757 /* BGP GR ERRORS */
1758 #define BGP_ERR_GR_INVALID_CMD -36
1759 #define BGP_ERR_GR_OPERATION_FAILED -37
1760 #define BGP_GR_NO_OPERATION -38
1761
1762 /*
1763 * Enumeration of different policy kinds a peer can be configured with.
1764 */
1765 typedef enum {
1766 BGP_POLICY_ROUTE_MAP,
1767 BGP_POLICY_FILTER_LIST,
1768 BGP_POLICY_PREFIX_LIST,
1769 BGP_POLICY_DISTRIBUTE_LIST,
1770 } bgp_policy_type_e;
1771
1772 /* peer_flag_change_type. */
1773 enum peer_change_type {
1774 peer_change_none,
1775 peer_change_reset,
1776 peer_change_reset_in,
1777 peer_change_reset_out,
1778 };
1779
1780 extern struct bgp_master *bm;
1781 extern unsigned int multipath_num;
1782
1783 /* Prototypes. */
1784 extern void bgp_terminate(void);
1785 extern void bgp_reset(void);
1786 extern time_t bgp_clock(void);
1787 extern void bgp_zclient_reset(void);
1788 extern struct bgp *bgp_get_default(void);
1789 extern struct bgp *bgp_lookup(as_t, const char *);
1790 extern struct bgp *bgp_lookup_by_name(const char *);
1791 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1792 extern struct bgp *bgp_get_evpn(void);
1793 extern void bgp_set_evpn(struct bgp *bgp);
1794 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1795 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1796 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1797 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1798 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1799 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1800 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1801 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1802 union sockunion *,
1803 struct peer_group *);
1804 extern struct prefix *
1805 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1806 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1807 struct prefix *,
1808 struct prefix **);
1809 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1810 union sockunion *);
1811
1812 /*
1813 * Peers are incredibly easy to memory leak
1814 * due to the various ways that they are actually used
1815 * Provide some functionality to debug locks and unlocks
1816 */
1817 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1818 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1819 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1820 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1821
1822 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1823 extern bgp_peer_sort_t peer_sort_lookup(struct peer *peer);
1824
1825 extern bool peer_active(struct peer *);
1826 extern bool peer_active_nego(struct peer *);
1827 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1828 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1829 as_t, as_t, int, afi_t, safi_t,
1830 struct peer_group *);
1831 extern struct peer *peer_create_accept(struct bgp *);
1832 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1833 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1834 json_object *json);
1835
1836 extern int bgp_config_write(struct vty *);
1837
1838 extern void bgp_master_init(struct thread_master *master,
1839 const int buffer_size);
1840
1841 extern void bgp_init(unsigned short instance);
1842 extern void bgp_pthreads_run(void);
1843 extern void bgp_pthreads_finish(void);
1844 extern void bgp_route_map_init(void);
1845 extern void bgp_session_reset(struct peer *);
1846
1847 extern int bgp_option_set(int);
1848 extern int bgp_option_unset(int);
1849 extern int bgp_option_check(int);
1850
1851 /* set the bgp no-rib option during runtime and remove installed routes */
1852 extern void bgp_option_norib_set_runtime(void);
1853
1854 /* unset the bgp no-rib option during runtime and reset all peers */
1855 extern void bgp_option_norib_unset_runtime(void);
1856
1857 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1858 extern void bgp_instance_up(struct bgp *);
1859 extern void bgp_instance_down(struct bgp *);
1860 extern int bgp_delete(struct bgp *);
1861
1862 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1863 vrf_id_t old_vrf_id, bool create);
1864
1865 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1866 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
1867
1868 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
1869 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1870 extern int bgp_cluster_id_unset(struct bgp *);
1871
1872 extern void bgp_confederation_id_set(struct bgp *, as_t);
1873 extern int bgp_confederation_id_unset(struct bgp *);
1874 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
1875
1876 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1877 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1878
1879 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
1880 uint32_t connect_retry);
1881 extern void bgp_timers_unset(struct bgp *);
1882
1883 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1884 extern int bgp_default_local_preference_unset(struct bgp *);
1885
1886 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1887 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1888
1889 extern int bgp_listen_limit_set(struct bgp *, int);
1890 extern int bgp_listen_limit_unset(struct bgp *);
1891
1892 extern bool bgp_update_delay_active(struct bgp *);
1893 extern bool bgp_update_delay_configured(struct bgp *);
1894 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1895 extern void peer_as_change(struct peer *, as_t, int);
1896 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1897 int, afi_t, safi_t);
1898 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1899 extern int peer_delete(struct peer *peer);
1900 extern void peer_notify_unconfig(struct peer *peer);
1901 extern int peer_group_delete(struct peer_group *);
1902 extern int peer_group_remote_as_delete(struct peer_group *);
1903 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1904 extern void peer_group_notify_unconfig(struct peer_group *group);
1905
1906 extern int peer_activate(struct peer *, afi_t, safi_t);
1907 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1908
1909 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1910 struct peer_group *, as_t *);
1911
1912 extern int peer_flag_set(struct peer *, uint32_t);
1913 extern int peer_flag_unset(struct peer *, uint32_t);
1914 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1915
1916 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1917 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1918 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1919 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1920 uint32_t flag);
1921 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1922 enum peer_change_type type);
1923
1924 extern int peer_ebgp_multihop_set(struct peer *, int);
1925 extern int peer_ebgp_multihop_unset(struct peer *);
1926 extern int is_ebgp_multihop_configured(struct peer *peer);
1927
1928 extern void peer_description_set(struct peer *, const char *);
1929 extern void peer_description_unset(struct peer *);
1930
1931 extern int peer_update_source_if_set(struct peer *, const char *);
1932 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1933 extern int peer_update_source_unset(struct peer *);
1934
1935 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1936 const char *rmap,
1937 struct route_map *route_map);
1938 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1939
1940 extern void peer_port_set(struct peer *, uint16_t);
1941 extern void peer_port_unset(struct peer *);
1942
1943 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1944 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1945
1946 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1947 uint32_t holdtime);
1948 extern int peer_timers_unset(struct peer *);
1949
1950 extern int peer_timers_connect_set(struct peer *, uint32_t);
1951 extern int peer_timers_connect_unset(struct peer *);
1952
1953 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1954 extern int peer_advertise_interval_unset(struct peer *);
1955
1956 extern void peer_interface_set(struct peer *, const char *);
1957 extern void peer_interface_unset(struct peer *);
1958
1959 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1960 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1961
1962 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1963 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1964
1965 extern int peer_local_as_set(struct peer *, as_t, bool no_prepend,
1966 bool replace_as);
1967 extern int peer_local_as_unset(struct peer *);
1968
1969 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1970 const char *);
1971 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1972
1973 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1974 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1975
1976 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1977 const char *name, struct route_map *route_map);
1978 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1979
1980 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1981 const char *name,
1982 struct route_map *route_map);
1983
1984 extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
1985 const char *advertise_name,
1986 struct route_map *advertise_map,
1987 const char *condition_name,
1988 struct route_map *condition_map,
1989 bool condition);
1990
1991 extern int peer_password_set(struct peer *, const char *);
1992 extern int peer_password_unset(struct peer *);
1993
1994 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1995
1996 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
1997 const char *advertise_name,
1998 struct route_map *advertise_map,
1999 const char *condition_name,
2000 struct route_map *condition_map,
2001 bool condition);
2002
2003 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2004 uint8_t, int, uint16_t, bool force);
2005 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2006
2007 extern int peer_clear(struct peer *, struct listnode **);
2008 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2009
2010 extern int peer_ttl_security_hops_set(struct peer *, int);
2011 extern int peer_ttl_security_hops_unset(struct peer *);
2012
2013 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2014 extern void peer_tx_shutdown_message_unset(struct peer *);
2015
2016 extern int bgp_route_map_update_timer(struct thread *thread);
2017 extern void bgp_route_map_terminate(void);
2018
2019 extern int peer_cmp(struct peer *p1, struct peer *p2);
2020
2021 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2022 afi_t *afi, safi_t *safi);
2023 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2024 iana_afi_t *pkt_afi,
2025 iana_safi_t *pkt_safi);
2026
2027 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2028 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2029 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2030
2031 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2032 extern void bgp_shutdown_disable(struct bgp *bgp);
2033
2034 extern void bgp_close(void);
2035 extern void bgp_free(struct bgp *);
2036 void bgp_gr_apply_running_config(void);
2037
2038 /* BGP GR */
2039 int bgp_global_gr_init(struct bgp *bgp);
2040 int bgp_peer_gr_init(struct peer *peer);
2041
2042
2043 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2044 do { \
2045 struct peer *peer_loop; \
2046 bool gr_router_detected = false; \
2047 struct listnode *node = {0}; \
2048 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2049 if (CHECK_FLAG(peer_loop->flags, \
2050 PEER_FLAG_GRACEFUL_RESTART)) \
2051 gr_router_detected = true; \
2052 } \
2053 if (gr_router_detected \
2054 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2055 bgp_zebra_send_capabilities(_bgp, false); \
2056 } else if (!gr_router_detected \
2057 && _bgp->present_zebra_gr_state \
2058 == ZEBRA_GR_ENABLE) { \
2059 bgp_zebra_send_capabilities(_bgp, true); \
2060 } \
2061 } while (0)
2062
2063 static inline struct bgp *bgp_lock(struct bgp *bgp)
2064 {
2065 bgp->lock++;
2066 return bgp;
2067 }
2068
2069 static inline void bgp_unlock(struct bgp *bgp)
2070 {
2071 assert(bgp->lock > 0);
2072 if (--bgp->lock == 0)
2073 bgp_free(bgp);
2074 }
2075
2076 static inline int afindex(afi_t afi, safi_t safi)
2077 {
2078 switch (afi) {
2079 case AFI_IP:
2080 switch (safi) {
2081 case SAFI_UNICAST:
2082 return BGP_AF_IPV4_UNICAST;
2083 case SAFI_MULTICAST:
2084 return BGP_AF_IPV4_MULTICAST;
2085 case SAFI_LABELED_UNICAST:
2086 return BGP_AF_IPV4_LBL_UNICAST;
2087 case SAFI_MPLS_VPN:
2088 return BGP_AF_IPV4_VPN;
2089 case SAFI_ENCAP:
2090 return BGP_AF_IPV4_ENCAP;
2091 case SAFI_FLOWSPEC:
2092 return BGP_AF_IPV4_FLOWSPEC;
2093 default:
2094 return BGP_AF_MAX;
2095 }
2096 break;
2097 case AFI_IP6:
2098 switch (safi) {
2099 case SAFI_UNICAST:
2100 return BGP_AF_IPV6_UNICAST;
2101 case SAFI_MULTICAST:
2102 return BGP_AF_IPV6_MULTICAST;
2103 case SAFI_LABELED_UNICAST:
2104 return BGP_AF_IPV6_LBL_UNICAST;
2105 case SAFI_MPLS_VPN:
2106 return BGP_AF_IPV6_VPN;
2107 case SAFI_ENCAP:
2108 return BGP_AF_IPV6_ENCAP;
2109 case SAFI_FLOWSPEC:
2110 return BGP_AF_IPV6_FLOWSPEC;
2111 default:
2112 return BGP_AF_MAX;
2113 }
2114 break;
2115 case AFI_L2VPN:
2116 switch (safi) {
2117 case SAFI_EVPN:
2118 return BGP_AF_L2VPN_EVPN;
2119 default:
2120 return BGP_AF_MAX;
2121 }
2122 default:
2123 return BGP_AF_MAX;
2124 }
2125 }
2126
2127 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2128 static inline int peer_group_active(struct peer *peer)
2129 {
2130 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2131 return 1;
2132 return 0;
2133 }
2134
2135 /* If peer is negotiated at least one address family return 1. */
2136 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2137 {
2138 if (peer->afc_nego[afi][SAFI_UNICAST]
2139 || peer->afc_nego[afi][SAFI_MULTICAST]
2140 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2141 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2142 || peer->afc_nego[afi][SAFI_ENCAP]
2143 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2144 || peer->afc_nego[afi][SAFI_EVPN])
2145 return 1;
2146 return 0;
2147 }
2148
2149 /* If at least one address family activated for group, return 1. */
2150 static inline int peer_group_af_configured(struct peer_group *group)
2151 {
2152 struct peer *peer = group->conf;
2153
2154 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2155 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2156 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2157 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2158 || peer->afc[AFI_IP6][SAFI_UNICAST]
2159 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2160 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2161 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2162 || peer->afc[AFI_IP6][SAFI_ENCAP]
2163 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2164 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2165 return 1;
2166 return 0;
2167 }
2168
2169 static inline char *timestamp_string(time_t ts)
2170 {
2171 time_t tbuf;
2172 tbuf = time(NULL) - (bgp_clock() - ts);
2173 return ctime(&tbuf);
2174 }
2175
2176 static inline int peer_established(struct peer *peer)
2177 {
2178 if (peer->status == Established)
2179 return 1;
2180 return 0;
2181 }
2182
2183 static inline int peer_dynamic_neighbor(struct peer *peer)
2184 {
2185 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
2186 }
2187
2188 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2189 {
2190 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2191 }
2192
2193 /* Lookup VRF for BGP instance based on its type. */
2194 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2195 {
2196 struct vrf *vrf;
2197
2198 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2199 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2200 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2201 vrf = vrf_lookup_by_name(bgp->name);
2202 else
2203 vrf = NULL;
2204
2205 return vrf;
2206 }
2207
2208 /* Link BGP instance to VRF. */
2209 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2210 {
2211 bgp->vrf_id = vrf->vrf_id;
2212 if (vrf->info != (void *)bgp)
2213 vrf->info = (void *)bgp_lock(bgp);
2214 }
2215
2216 /* Unlink BGP instance from VRF. */
2217 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2218 {
2219 if (vrf->info == (void *)bgp) {
2220 vrf->info = NULL;
2221 bgp_unlock(bgp);
2222 }
2223 bgp->vrf_id = VRF_UNKNOWN;
2224 }
2225
2226 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2227 {
2228 /* True if either set for this instance or globally */
2229 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2230 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2231 }
2232
2233 extern void bgp_unset_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
2234
2235 /* For benefit of rfapi */
2236 extern struct peer *peer_new(struct bgp *bgp);
2237
2238 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2239 const char *ip_str, bool use_json);
2240 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2241 const char *name,
2242 enum bgp_instance_type inst_type);
2243
2244 /* Hooks */
2245 DECLARE_HOOK(peer_status_changed, (struct peer * peer), (peer))
2246 void peer_nsf_stop(struct peer *peer);
2247
2248 #endif /* _QUAGGA_BGPD_H */
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