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