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bgpd: Adding header files for BGPD-ZEBRA integration for GR.
[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
46 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
47 #define BGP_PEER_MAX_HASH_SIZE 16384
48
49 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
50 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
51
52 struct update_subgroup;
53 struct bpacket;
54 struct bgp_pbr_config;
55
56 /*
57 * Allow the neighbor XXXX remote-as to take internal or external
58 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
59 * behavior
60 * in the system.
61 */
62 enum { AS_UNSPECIFIED = 0,
63 AS_SPECIFIED,
64 AS_INTERNAL,
65 AS_EXTERNAL,
66 };
67
68 /* Zebra Gracaful Restart states */
69 enum zebra_gr_mode {
70 ZEBRA_GR_DISABLE = 0,
71 ZEBRA_GR_ENABLE
72 };
73
74 /* Typedef BGP specific types. */
75 typedef uint32_t as_t;
76 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
77 typedef uint16_t bgp_size_t;
78
79 #define max(a, b) \
80 ({ \
81 __typeof__(a) _a = (a); \
82 __typeof__(b) _b = (b); \
83 _a > _b ? _a : _b; \
84 })
85
86 enum bgp_af_index {
87 BGP_AF_START,
88 BGP_AF_IPV4_UNICAST = BGP_AF_START,
89 BGP_AF_IPV4_MULTICAST,
90 BGP_AF_IPV4_VPN,
91 BGP_AF_IPV6_UNICAST,
92 BGP_AF_IPV6_MULTICAST,
93 BGP_AF_IPV6_VPN,
94 BGP_AF_IPV4_ENCAP,
95 BGP_AF_IPV6_ENCAP,
96 BGP_AF_L2VPN_EVPN,
97 BGP_AF_IPV4_LBL_UNICAST,
98 BGP_AF_IPV6_LBL_UNICAST,
99 BGP_AF_IPV4_FLOWSPEC,
100 BGP_AF_IPV6_FLOWSPEC,
101 BGP_AF_MAX
102 };
103
104 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
105
106 #define FOREACH_AFI_SAFI(afi, safi) \
107 for (afi = AFI_IP; afi < AFI_MAX; afi++) \
108 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
109
110 #define FOREACH_SAFI(safi) \
111 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
112
113 extern struct frr_pthread *bgp_pth_io;
114 extern struct frr_pthread *bgp_pth_ka;
115
116 /* BGP master for system wide configurations and variables. */
117 struct bgp_master {
118 /* BGP instance list. */
119 struct list *bgp;
120
121 /* BGP thread master. */
122 struct thread_master *master;
123
124 /* work queues */
125 struct work_queue *process_main_queue;
126
127 /* Listening sockets */
128 struct list *listen_sockets;
129
130 /* BGP port number. */
131 uint16_t port;
132
133 /* Listener address */
134 char *address;
135
136 /* The Mac table */
137 struct hash *self_mac_hash;
138
139 /* BGP start time. */
140 time_t start_time;
141
142 /* Various BGP global configuration. */
143 uint8_t options;
144 #define BGP_OPT_NO_FIB (1 << 0)
145 #define BGP_OPT_NO_LISTEN (1 << 1)
146 #define BGP_OPT_NO_ZEBRA (1 << 2)
147
148 uint64_t updgrp_idspace;
149 uint64_t subgrp_idspace;
150
151 /* timer to dampen route map changes */
152 struct thread *t_rmap_update; /* Handle route map updates */
153 uint32_t rmap_update_timer; /* Route map update timer */
154 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
155
156 /* Id space for automatic RD derivation for an EVI/VRF */
157 bitfield_t rd_idspace;
158
159 /* dynamic mpls label allocation pool */
160 struct labelpool labelpool;
161
162 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
163 struct bgp* bgp_evpn;
164
165 /* How big should we set the socket buffer size */
166 uint32_t socket_buffer;
167
168 bool terminating; /* global flag that sigint terminate seen */
169 QOBJ_FIELDS
170 };
171 DECLARE_QOBJ_TYPE(bgp_master)
172
173 /* BGP route-map structure. */
174 struct bgp_rmap {
175 char *name;
176 struct route_map *map;
177 };
178
179 struct bgp_redist {
180 unsigned short instance;
181
182 /* BGP redistribute metric configuration. */
183 uint8_t redist_metric_flag;
184 uint32_t redist_metric;
185
186 /* BGP redistribute route-map. */
187 struct bgp_rmap rmap;
188 };
189
190 typedef enum {
191 BGP_VPN_POLICY_DIR_FROMVPN = 0,
192 BGP_VPN_POLICY_DIR_TOVPN = 1,
193 BGP_VPN_POLICY_DIR_MAX = 2
194 } vpn_policy_direction_t;
195
196 struct vpn_policy {
197 struct bgp *bgp; /* parent */
198 afi_t afi;
199 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
200 struct ecommunity *import_redirect_rtlist;
201 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
202 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
203
204 /* should be mpls_label_t? */
205 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
206 uint32_t tovpn_zebra_vrf_label_last_sent;
207 struct prefix_rd tovpn_rd;
208 struct prefix tovpn_nexthop; /* unset => set to 0 */
209 uint32_t flags;
210 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
211 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
212 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
213
214 /*
215 * If we are importing another vrf into us keep a list of
216 * vrf names that are being imported into us.
217 */
218 struct list *import_vrf;
219
220 /*
221 * if we are being exported to another vrf keep a list of
222 * vrf names that we are being exported to.
223 */
224 struct list *export_vrf;
225 };
226
227 /*
228 * Type of 'struct bgp'.
229 * - Default: The default instance
230 * - VRF: A specific (non-default) VRF
231 * - View: An instance used for route exchange
232 * The "default" instance is treated separately to simplify the code. Note
233 * that if deployed in a Multi-VRF environment, it may not exist.
234 */
235 enum bgp_instance_type {
236 BGP_INSTANCE_TYPE_DEFAULT,
237 BGP_INSTANCE_TYPE_VRF,
238 BGP_INSTANCE_TYPE_VIEW
239 };
240
241 #define BGP_SEND_EOR(bgp, afi, safi) \
242 (!bgp_flag_check(bgp, BGP_FLAG_GR_DISABLE_EOR) && \
243 ((bgp->gr_info[afi][safi].t_select_deferral == NULL) || \
244 (bgp->gr_info[afi][safi].eor_required == \
245 bgp->gr_info[afi][safi].eor_received)))
246
247 /* BGP GR Global ds */
248
249 #define GLOBAL_MODE 4
250 #define EVENT_CMD 4
251
252 /* Graceful restart selection deferral timer info */
253 struct graceful_restart_info {
254 /* Count of EOR message expected */
255 uint32_t eor_required;
256 /* Count of EOR received */
257 uint32_t eor_received;
258 /* Deferral Timer */
259 struct thread *t_select_deferral;
260 /* Route list */
261 struct list *route_list;
262 /* Best route select */
263 struct thread *t_route_select;
264 /* AFI, SAFI enabled */
265 bool af_enabled[AFI_MAX][SAFI_MAX];
266 /* Route update completed */
267 bool route_sync[AFI_MAX][SAFI_MAX];
268 };
269
270 enum global_mode {
271 GLOBAL_HELPER = 0, /* This is the default mode */
272 GLOBAL_GR,
273 GLOBAL_DISABLE,
274 GLOBAL_INVALID
275 };
276
277 enum global_gr_command {
278 GLOBAL_GR_CMD = 0,
279 NO_GLOBAL_GR_CMD,
280 GLOBAL_DISABLE_CMD,
281 NO_GLOBAL_DISABLE_CMD
282 };
283
284 #define BGP_GR_SUCCESS 0
285 #define BGP_GR_FAILURE 1
286
287 /* BGP instance structure. */
288 struct bgp {
289 /* AS number of this BGP instance. */
290 as_t as;
291
292 /* Name of this BGP instance. */
293 char *name;
294 char *name_pretty; /* printable "VRF|VIEW name|default" */
295
296 /* Type of instance and VRF id. */
297 enum bgp_instance_type inst_type;
298 vrf_id_t vrf_id;
299
300 /* Reference count to allow peer_delete to finish after bgp_delete */
301 int lock;
302
303 /* Self peer. */
304 struct peer *peer_self;
305
306 /* BGP peer. */
307 struct list *peer;
308 struct hash *peerhash;
309
310 /* BGP peer group. */
311 struct list *group;
312
313 /* The maximum number of BGP dynamic neighbors that can be created */
314 int dynamic_neighbors_limit;
315
316 /* The current number of BGP dynamic neighbors */
317 int dynamic_neighbors_count;
318
319 struct hash *update_groups[BGP_AF_MAX];
320
321 /*
322 * Global statistics for update groups.
323 */
324 struct {
325 uint32_t join_events;
326 uint32_t prune_events;
327 uint32_t merge_events;
328 uint32_t split_events;
329 uint32_t updgrp_switch_events;
330 uint32_t peer_refreshes_combined;
331 uint32_t adj_count;
332 uint32_t merge_checks_triggered;
333
334 uint32_t updgrps_created;
335 uint32_t updgrps_deleted;
336 uint32_t subgrps_created;
337 uint32_t subgrps_deleted;
338 } update_group_stats;
339
340 /* BGP configuration. */
341 uint16_t config;
342 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
343 #define BGP_CONFIG_CONFEDERATION (1 << 1)
344
345 /* BGP router identifier. */
346 struct in_addr router_id;
347 struct in_addr router_id_static;
348 struct in_addr router_id_zebra;
349
350 /* BGP route reflector cluster ID. */
351 struct in_addr cluster_id;
352
353 /* BGP confederation information. */
354 as_t confed_id;
355 as_t *confed_peers;
356 int confed_peers_cnt;
357
358 struct thread
359 *t_startup; /* start-up timer on only once at the beginning */
360
361 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
362 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
363 uint32_t maxmed_onstartup_value; /* Max-med value when active on
364 start-up */
365 struct thread
366 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
367 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
368
369 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
370 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
371 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
372 */
373 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
374
375 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
376 uint32_t maxmed_value; /* Max-med value when its active */
377
378 /* BGP update delay on startup */
379 struct thread *t_update_delay;
380 struct thread *t_establish_wait;
381 uint8_t update_delay_over;
382 uint8_t main_zebra_update_hold;
383 uint8_t main_peers_update_hold;
384 uint16_t v_update_delay;
385 uint16_t v_establish_wait;
386 char update_delay_begin_time[64];
387 char update_delay_end_time[64];
388 char update_delay_zebra_resume_time[64];
389 char update_delay_peers_resume_time[64];
390 uint32_t established;
391 uint32_t restarted_peers;
392 uint32_t implicit_eors;
393 uint32_t explicit_eors;
394 #define BGP_UPDATE_DELAY_DEF 0
395 #define BGP_UPDATE_DELAY_MIN 0
396 #define BGP_UPDATE_DELAY_MAX 3600
397
398 /* BGP flags. */
399 uint32_t flags;
400 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
401 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
402 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
403 #define BGP_FLAG_MED_CONFED (1 << 3)
404 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
405 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
406 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
407 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
408 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
409 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
410 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
411
412 /* This flag is set when we have full BGP Graceful-Restart mode enable */
413 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
414
415 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
416 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
417 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
418 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
419 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
420 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
421 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
422 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
423 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
424 #define BGP_FLAG_DELETE_IN_PROGRESS (1 << 22)
425 #define BGP_FLAG_SELECT_DEFER_DISABLE (1 << 23)
426 #define BGP_FLAG_GR_DISABLE_EOR (1 << 24)
427
428 enum global_mode GLOBAL_GR_FSM[GLOBAL_MODE][EVENT_CMD];
429 enum global_mode global_gr_present_state;
430
431 /* This variable stores the current Graceful Restart state of Zebra
432 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
433 */
434 enum zebra_gr_mode present_zebra_gr_state;
435
436 /* BGP Per AF flags */
437 uint16_t af_flags[AFI_MAX][SAFI_MAX];
438 #define BGP_CONFIG_DAMPENING (1 << 0)
439 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
440 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
441 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
442 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
443 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
444 /* import/export between address families */
445 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
446 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
447 /* vrf-route leaking flags */
448 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
449 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
450
451 /* BGP per AF peer count */
452 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
453
454 /* Route table for next-hop lookup cache. */
455 struct bgp_table *nexthop_cache_table[AFI_MAX];
456
457 /* Route table for import-check */
458 struct bgp_table *import_check_table[AFI_MAX];
459
460 struct bgp_table *connected_table[AFI_MAX];
461
462 struct hash *address_hash;
463
464 /* DB for all local tunnel-ips - used mainly for martian checks
465 Currently it only has all VxLan tunnel IPs*/
466 struct hash *tip_hash;
467
468 /* Static route configuration. */
469 struct bgp_table *route[AFI_MAX][SAFI_MAX];
470
471 /* Aggregate address configuration. */
472 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
473
474 /* BGP routing information base. */
475 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
476
477 /* BGP table route-map. */
478 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
479
480 /* BGP redistribute configuration. */
481 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
482
483 /* Allocate MPLS labels */
484 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
485
486 /* Allocate hash entries to store policy routing information
487 * The hash are used to host pbr rules somewhere.
488 * Actually, pbr will only be used by flowspec
489 * those hash elements will have relationship together as
490 * illustrated in below diagram:
491 *
492 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
493 * <----- pbr_match j <--- pbr_match_entry 1..m
494 * <----- pbr_rule k
495 *
496 * - here in BGP structure, the list of match and actions will
497 * stand for the list of ipset sets, and table_ids in the kernel
498 * - the arrow above between pbr_match and pbr_action indicate
499 * that a backpointer permits match to find the action
500 * - the arrow betwen match_entry and match is a hash list
501 * contained in match, that lists the whole set of entries
502 */
503 struct hash *pbr_match_hash;
504 struct hash *pbr_rule_hash;
505 struct hash *pbr_action_hash;
506
507 /* timer to re-evaluate neighbor default-originate route-maps */
508 struct thread *t_rmap_def_originate_eval;
509 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
510
511 /* BGP distance configuration. */
512 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
513 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
514 uint8_t distance_local[AFI_MAX][SAFI_MAX];
515
516 /* BGP default local-preference. */
517 uint32_t default_local_pref;
518
519 /* BGP default subgroup pkt queue max */
520 uint32_t default_subgroup_pkt_queue_max;
521
522 /* BGP default timer. */
523 uint32_t default_holdtime;
524 uint32_t default_keepalive;
525 uint32_t default_connect_retry;
526
527 /* BGP graceful restart */
528 uint32_t restart_time;
529 uint32_t stalepath_time;
530 uint32_t select_defer_time;
531 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
532 uint32_t rib_stale_time;
533
534 #define BGP_ROUTE_SELECT_DELAY 1
535 #define BGP_MAX_BEST_ROUTE_SELECT 10000
536 /* Maximum-paths configuration */
537 struct bgp_maxpaths_cfg {
538 uint16_t maxpaths_ebgp;
539 uint16_t maxpaths_ibgp;
540 uint16_t ibgp_flags;
541 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
542 } maxpaths[AFI_MAX][SAFI_MAX];
543
544 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
545 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
546
547 /* Automatic coalesce adjust on/off */
548 bool heuristic_coalesce;
549 /* Actual coalesce time */
550 uint32_t coalesce_time;
551
552 /* Auto-shutdown new peers */
553 bool autoshutdown;
554
555 struct bgp_addpath_bgp_data tx_addpath;
556
557 #if ENABLE_BGP_VNC
558 struct rfapi_cfg *rfapi_cfg;
559 struct rfapi *rfapi;
560 #endif
561
562 /* EVPN related information */
563
564 /* EVI hash table */
565 struct hash *vnihash;
566
567 /* EVPN enable - advertise gateway macip routes */
568 int advertise_gw_macip;
569
570 /* EVPN enable - advertise local VNIs and their MACs etc. */
571 int advertise_all_vni;
572
573 /* RFC 8212 - prevent route leaks. */
574 int ebgp_requires_policy;
575 #define DEFAULT_EBGP_POLICY_DISABLED 0
576 #define DEFAULT_EBGP_POLICY_ENABLED 1
577
578 /* draft-ietf-idr-deprecate-as-set-confed-set
579 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
580 */
581 bool reject_as_sets;
582 #define BGP_REJECT_AS_SETS_DISABLED 0
583 #define BGP_REJECT_AS_SETS_ENABLED 1
584
585 struct bgp_evpn_info *evpn_info;
586
587 /* EVPN - use RFC 8365 to auto-derive RT */
588 int advertise_autort_rfc8365;
589
590 /*
591 * Flooding mechanism for BUM packets for VxLAN-EVPN.
592 */
593 enum vxlan_flood_control vxlan_flood_ctrl;
594
595 /* Hash table of Import RTs to EVIs */
596 struct hash *import_rt_hash;
597
598 /* Hash table of VRF import RTs to VRFs */
599 struct hash *vrf_import_rt_hash;
600
601 /* L3-VNI corresponding to this vrf */
602 vni_t l3vni;
603
604 /* router-mac to be used in mac-ip routes for this vrf */
605 struct ethaddr rmac;
606
607 /* originator ip - to be used as NH for type-5 routes */
608 struct in_addr originator_ip;
609
610 /* SVI associated with the L3-VNI corresponding to this vrf */
611 ifindex_t l3vni_svi_ifindex;
612
613 /* vrf flags */
614 uint32_t vrf_flags;
615 #define BGP_VRF_AUTO (1 << 0)
616 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
617 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
618 #define BGP_VRF_RD_CFGD (1 << 3)
619 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
620
621 #define BGP_SEND_EOR(bgp, afi, safi) \
622 (!bgp_flag_check(bgp, BGP_FLAG_GR_DISABLE_EOR) && \
623 ((bgp->gr_info[afi][safi].t_select_deferral == NULL) || \
624 (bgp->gr_info[afi][safi].eor_required == \
625 bgp->gr_info[afi][safi].eor_received)))
626
627 /* unique ID for auto derivation of RD for this vrf */
628 uint16_t vrf_rd_id;
629
630 /* Automatically derived RD for this VRF */
631 struct prefix_rd vrf_prd_auto;
632
633 /* RD for this VRF */
634 struct prefix_rd vrf_prd;
635
636 /* import rt list for the vrf instance */
637 struct list *vrf_import_rtl;
638
639 /* export rt list for the vrf instance */
640 struct list *vrf_export_rtl;
641
642 /* list of corresponding l2vnis (struct bgpevpn) */
643 struct list *l2vnis;
644
645 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
646 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
647
648 struct vpn_policy vpn_policy[AFI_MAX];
649
650 struct bgp_pbr_config *bgp_pbr_cfg;
651
652 /* local esi hash table */
653 struct hash *esihash;
654
655 /* Count of peers in established state */
656 uint32_t established_peers;
657
658 QOBJ_FIELDS
659 };
660 DECLARE_QOBJ_TYPE(bgp)
661
662 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
663 DECLARE_HOOK(bgp_inst_config_write,
664 (struct bgp *bgp, struct vty *vty),
665 (bgp, vty))
666
667 /* Thread callback information */
668 struct afi_safi_info {
669 afi_t afi;
670 safi_t safi;
671 struct bgp *bgp;
672 };
673
674 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
675
676 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
677 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
678 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
679 && bgp->vrf_id != VRF_UNKNOWN))
680
681 #define BGP_SELECT_DEFER_DISABLE(bgp) \
682 (bgp_flag_check(bgp, BGP_FLAG_SELECT_DEFER_DISABLE))
683
684 /* BGP peer-group support. */
685 struct peer_group {
686 /* Name of the peer-group. */
687 char *name;
688
689 /* Pointer to BGP. */
690 struct bgp *bgp;
691
692 /* Peer-group client list. */
693 struct list *peer;
694
695 /** Dynamic neighbor listening ranges */
696 struct list *listen_range[AFI_MAX];
697
698 /* Peer-group config */
699 struct peer *conf;
700 };
701
702 /* BGP Notify message format. */
703 struct bgp_notify {
704 uint8_t code;
705 uint8_t subcode;
706 char *data;
707 bgp_size_t length;
708 uint8_t *raw_data;
709 };
710
711 /* Next hop self address. */
712 struct bgp_nexthop {
713 struct interface *ifp;
714 struct in_addr v4;
715 struct in6_addr v6_global;
716 struct in6_addr v6_local;
717 };
718
719 /* BGP addpath values */
720 #define BGP_ADDPATH_RX 1
721 #define BGP_ADDPATH_TX 2
722 #define BGP_ADDPATH_ID_LEN 4
723
724 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
725
726 /* Route map direction */
727 #define RMAP_IN 0
728 #define RMAP_OUT 1
729 #define RMAP_MAX 2
730
731 #define BGP_DEFAULT_TTL 1
732
733 #include "filter.h"
734
735 /* BGP filter structure. */
736 struct bgp_filter {
737 /* Distribute-list. */
738 struct {
739 char *name;
740 struct access_list *alist;
741 } dlist[FILTER_MAX];
742
743 /* Prefix-list. */
744 struct {
745 char *name;
746 struct prefix_list *plist;
747 } plist[FILTER_MAX];
748
749 /* Filter-list. */
750 struct {
751 char *name;
752 struct as_list *aslist;
753 } aslist[FILTER_MAX];
754
755 /* Route-map. */
756 struct {
757 char *name;
758 struct route_map *map;
759 } map[RMAP_MAX];
760
761 /* Unsuppress-map. */
762 struct {
763 char *name;
764 struct route_map *map;
765 } usmap;
766 };
767
768 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
769 a peer who's AS is part of our Confederation. */
770 typedef enum {
771 BGP_PEER_UNSPECIFIED,
772 BGP_PEER_IBGP,
773 BGP_PEER_EBGP,
774 BGP_PEER_INTERNAL,
775 BGP_PEER_CONFED,
776 } bgp_peer_sort_t;
777
778 /* BGP message header and packet size. */
779 #define BGP_MARKER_SIZE 16
780 #define BGP_HEADER_SIZE 19
781 #define BGP_MAX_PACKET_SIZE 4096
782 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
783
784 /*
785 * Trigger delay for bgp_announce_route().
786 */
787 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
788 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
789
790 struct peer_af {
791 /* back pointer to the peer */
792 struct peer *peer;
793
794 /* which subgroup the peer_af belongs to */
795 struct update_subgroup *subgroup;
796
797 /* for being part of an update subgroup's peer list */
798 LIST_ENTRY(peer_af) subgrp_train;
799
800 /* for being part of a packet's peer list */
801 LIST_ENTRY(peer_af) pkt_train;
802
803 struct bpacket *next_pkt_to_send;
804
805 /*
806 * Trigger timer for bgp_announce_route().
807 */
808 struct thread *t_announce_route;
809
810 afi_t afi;
811 safi_t safi;
812 int afid;
813 };
814 /* BGP GR per peer ds */
815
816 #define PEER_MODE 5
817 #define PEER_EVENT_CMD 6
818
819 enum peer_mode {
820 PEER_HELPER = 0,
821 PEER_GR,
822 PEER_DISABLE,
823 PEER_INVALID,
824 PEER_GLOBAL_INHERIT /* This is the default mode */
825
826 };
827
828 enum peer_gr_command {
829 PEER_GR_CMD = 0,
830 NO_PEER_GR_CMD,
831 PEER_DISABLE_cmd,
832 NO_PEER_DISABLE_CMD,
833 PEER_HELPER_CMD,
834 NO_PEER_HELPER_CMD
835 };
836
837 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
838
839 struct bgp_peer_gr {
840 enum peer_mode next_state;
841 bgp_peer_gr_action_ptr action_fun;
842 };
843
844
845 /* BGP neighbor structure. */
846 struct peer {
847 /* BGP structure. */
848 struct bgp *bgp;
849
850 /* reference count, primarily to allow bgp_process'ing of route_node's
851 * to be done after a struct peer is deleted.
852 *
853 * named 'lock' for hysterical reasons within Quagga.
854 */
855 int lock;
856
857 /* BGP peer group. */
858 struct peer_group *group;
859 uint64_t version[AFI_MAX][SAFI_MAX];
860
861 /* BGP peer_af structures, per configured AF on this peer */
862 struct peer_af *peer_af_array[BGP_AF_MAX];
863
864 /* Peer's remote AS number. */
865 int as_type;
866 as_t as;
867
868 /* Peer's local AS number. */
869 as_t local_as;
870
871 bgp_peer_sort_t sort;
872
873 /* Peer's Change local AS number. */
874 as_t change_local_as;
875
876 /* Remote router ID. */
877 struct in_addr remote_id;
878
879 /* Local router ID. */
880 struct in_addr local_id;
881
882 /* Packet receive and send buffer. */
883 pthread_mutex_t io_mtx; // guards ibuf, obuf
884 struct stream_fifo *ibuf; // packets waiting to be processed
885 struct stream_fifo *obuf; // packets waiting to be written
886
887 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
888 struct stream *obuf_work; // WiP buffer used to construct packets
889
890 struct stream *curr; // the current packet being parsed
891
892 /* We use a separate stream to encode MP_REACH_NLRI for efficient
893 * NLRI packing. peer->obuf_work stores all the other attributes. The
894 * actual packet is then constructed by concatenating the two.
895 */
896 struct stream *scratch;
897
898 /* the doppelganger peer structure, due to dual TCP conn setup */
899 struct peer *doppelganger;
900
901 /* Status of the peer. */
902 int status;
903 int ostatus;
904
905 /* FSM events, stored for debug purposes.
906 * Note: uchar used for reduced memory usage.
907 */
908 unsigned char cur_event;
909 unsigned char last_event;
910 unsigned char last_major_event;
911
912 /* Peer index, used for dumping TABLE_DUMP_V2 format */
913 uint16_t table_dump_index;
914
915 /* Peer information */
916 int fd; /* File descriptor */
917 int ttl; /* TTL of TCP connection to the peer. */
918 int rtt; /* Estimated round-trip-time from TCP_INFO */
919 int gtsm_hops; /* minimum hopcount to peer */
920 char *desc; /* Description of the peer. */
921 unsigned short port; /* Destination port for peer */
922 char *host; /* Printable address of the peer. */
923 union sockunion su; /* Sockunion address of the peer. */
924 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
925 time_t uptime; /* Last Up/Down time */
926 time_t readtime; /* Last read time */
927 time_t resettime; /* Last reset time */
928
929 char *conf_if; /* neighbor interface config name. */
930 struct interface *ifp; /* corresponding interface */
931 char *ifname; /* bind interface name. */
932 char *update_if;
933 union sockunion *update_source;
934
935 union sockunion *su_local; /* Sockunion of local address. */
936 union sockunion *su_remote; /* Sockunion of remote address. */
937 int shared_network; /* Is this peer shared same network. */
938 struct bgp_nexthop nexthop; /* Nexthop */
939
940 /* Peer address family configuration. */
941 uint8_t afc[AFI_MAX][SAFI_MAX];
942 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
943 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
944 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
945
946 /* Capability flags (reset in bgp_stop) */
947 uint32_t cap;
948 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
949 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
950 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
951 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
952 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
953 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
954 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
955 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
956 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
957 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
958 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
959 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
960 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
961 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
962 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
963 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
964 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
965
966 /* Capability flags (reset in bgp_stop) */
967 uint32_t af_cap[AFI_MAX][SAFI_MAX];
968 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
969 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
970 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
971 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
972 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
973 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
974 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
975 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
976 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
977 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
978 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
979 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
980 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
981 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
982 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
983
984 /* Global configuration flags. */
985 /*
986 * Parallel array to flags that indicates whether each flag originates
987 * from a peer-group or if it is config that is specific to this
988 * individual peer. If a flag is set independent of the peer-group, the
989 * same bit should be set here. If this peer is a peer-group, this
990 * memory region should be all zeros.
991 *
992 * The assumption is that the default state for all flags is unset,
993 * so if a flag is unset, the corresponding override flag is unset too.
994 * However if a flag is set, the corresponding override flag is set.
995 */
996 uint32_t flags_override;
997 /*
998 * Parallel array to flags that indicates whether the default behavior
999 * of *flags_override* should be inverted. If a flag is unset and the
1000 * corresponding invert flag is set, the corresponding override flag
1001 * would be set. However if a flag is set and the corresponding invert
1002 * flag is unset, the corresponding override flag would be unset.
1003 *
1004 * This can be used for attributes like *send-community*, which are
1005 * implicitely enabled and have to be disabled explicitely, compared to
1006 * 'normal' attributes like *next-hop-self* which are implicitely set.
1007 *
1008 * All operations dealing with flags should apply the following boolean
1009 * logic to keep the internal flag system in a sane state:
1010 *
1011 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1012 * value=0 invert=1 Unset flag unconditionally
1013 * value=1 invert=0 Set flag unconditionally
1014 * value=1 invert=1 Inherit flag if member, otherwise set flag
1015 *
1016 * Contrary to the implementation of *flags_override*, the flag
1017 * inversion state can be set either on the peer OR the peer *and* the
1018 * peer-group. This was done on purpose, as the inversion state of a
1019 * flag can be determined on either the peer or the peer-group.
1020 *
1021 * Example: Enabling the cisco configuration mode inverts all flags
1022 * related to *send-community* unconditionally for both peer-groups and
1023 * peers.
1024 *
1025 * This behavior is different for interface peers though, which enable
1026 * the *extended-nexthop* flag by default, which regular peers do not.
1027 * As the peer-group can contain both regular and interface peers, the
1028 * flag inversion state must be set on the peer only.
1029 *
1030 * When a peer inherits the configuration from a peer-group and the
1031 * inversion state of the flag differs between peer and peer-group, the
1032 * newly set value must equal to the inverted state of the peer-group.
1033 */
1034 uint32_t flags_invert;
1035 /*
1036 * Effective array for storing the peer/peer-group flags. In case of a
1037 * peer-group, the peer-specific overrides (see flags_override and
1038 * flags_invert) must be respected.
1039 */
1040 uint32_t flags;
1041 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
1042 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
1043 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
1044 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
1045 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
1046 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
1047 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
1048 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
1049 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
1050 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
1051 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
1052 #define PEER_FLAG_LONESOUL (1 << 11)
1053 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
1054 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
1055 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
1056 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
1057 #define PEER_FLAG_ENFORCE_FIRST_AS (1 << 16) /* enforce-first-as */
1058 #define PEER_FLAG_ROUTEADV (1 << 17) /* route advertise */
1059 #define PEER_FLAG_TIMER (1 << 18) /* keepalive & holdtime */
1060 #define PEER_FLAG_TIMER_CONNECT (1 << 19) /* connect timer */
1061 #define PEER_FLAG_PASSWORD (1 << 20) /* password */
1062 #define PEER_FLAG_LOCAL_AS (1 << 21) /* local-as */
1063 #define PEER_FLAG_UPDATE_SOURCE (1 << 22) /* update-source */
1064
1065 /* BGP-GR Peer related flags */
1066 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1 << 23) /* Helper */
1067 #define PEER_FLAG_GRACEFUL_RESTART (1 << 24) /* Graceful Restart */
1068 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1 << 25) /* Global-Inherit */
1069
1070 /*
1071 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1072 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1073 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1074 */
1075
1076 struct bgp_peer_gr PEER_GR_FSM[PEER_MODE][PEER_EVENT_CMD];
1077 enum peer_mode peer_gr_present_state;
1078 /* Non stop forwarding afi-safi count for BGP gr feature*/
1079 uint8_t nsf_af_count;
1080
1081 uint8_t peer_gr_new_status_flag;
1082 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1 << 0)
1083 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1 << 1)
1084 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1 << 2)
1085
1086 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1087 char *tx_shutdown_message;
1088
1089 /* NSF mode (graceful restart) */
1090 uint8_t nsf[AFI_MAX][SAFI_MAX];
1091 /* EOR Send time */
1092 time_t eor_stime[AFI_MAX][SAFI_MAX];
1093 /* Last update packet sent time */
1094 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1095
1096 /* Peer Per AF flags */
1097 /*
1098 * Please consult the comments for *flags_override*, *flags_invert* and
1099 * *flags* to understand what these three arrays do. The address-family
1100 * specific attributes are being treated the exact same way as global
1101 * peer attributes.
1102 */
1103 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
1104 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
1105 uint32_t af_flags[AFI_MAX][SAFI_MAX];
1106 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
1107 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
1108 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
1109 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
1110 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
1111 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
1112 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
1113 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
1114 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
1115 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
1116 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
1117 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
1118 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
1119 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
1120 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
1121 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
1122 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
1123 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
1124 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
1125 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
1126 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
1127 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
1128 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
1129 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
1130 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
1131 #define PEER_FLAG_MAX_PREFIX_OUT (1 << 27) /* outgoing maximum prefix */
1132
1133 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1134
1135 /* MD5 password */
1136 char *password;
1137
1138 /* default-originate route-map. */
1139 struct {
1140 char *name;
1141 struct route_map *map;
1142 } default_rmap[AFI_MAX][SAFI_MAX];
1143
1144 /* Peer status flags. */
1145 uint16_t sflags;
1146 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
1147 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
1148 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
1149 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
1150 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
1151 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
1152 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
1153
1154 /* Peer status af flags (reset in bgp_stop) */
1155 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1156 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
1157 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
1158 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
1159 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
1160 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
1161 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
1162
1163 /* Configured timer values. */
1164 _Atomic uint32_t holdtime;
1165 _Atomic uint32_t keepalive;
1166 _Atomic uint32_t connect;
1167 _Atomic uint32_t routeadv;
1168
1169 /* Timer values. */
1170 _Atomic uint32_t v_start;
1171 _Atomic uint32_t v_connect;
1172 _Atomic uint32_t v_holdtime;
1173 _Atomic uint32_t v_keepalive;
1174 _Atomic uint32_t v_routeadv;
1175 _Atomic uint32_t v_pmax_restart;
1176 _Atomic uint32_t v_gr_restart;
1177
1178 /* Threads. */
1179 struct thread *t_read;
1180 struct thread *t_write;
1181 struct thread *t_start;
1182 struct thread *t_connect_check_r;
1183 struct thread *t_connect_check_w;
1184 struct thread *t_connect;
1185 struct thread *t_holdtime;
1186 struct thread *t_routeadv;
1187 struct thread *t_pmax_restart;
1188 struct thread *t_gr_restart;
1189 struct thread *t_gr_stale;
1190 struct thread *t_generate_updgrp_packets;
1191 struct thread *t_process_packet;
1192
1193 /* Thread flags. */
1194 _Atomic uint32_t thread_flags;
1195 #define PEER_THREAD_WRITES_ON (1 << 0)
1196 #define PEER_THREAD_READS_ON (1 << 1)
1197 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
1198 /* workqueues */
1199 struct work_queue *clear_node_queue;
1200
1201 #define PEER_TOTAL_RX(peer) \
1202 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1203 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1204 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1205 + atomic_load_explicit(&peer->refresh_in, \
1206 memory_order_relaxed) \
1207 + atomic_load_explicit(&peer->keepalive_in, \
1208 memory_order_relaxed) \
1209 + atomic_load_explicit(&peer->dynamic_cap_in, \
1210 memory_order_relaxed)
1211
1212 #define PEER_TOTAL_TX(peer) \
1213 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1214 + atomic_load_explicit(&peer->update_out, \
1215 memory_order_relaxed) \
1216 + atomic_load_explicit(&peer->notify_out, \
1217 memory_order_relaxed) \
1218 + atomic_load_explicit(&peer->refresh_out, \
1219 memory_order_relaxed) \
1220 + atomic_load_explicit(&peer->keepalive_out, \
1221 memory_order_relaxed) \
1222 + atomic_load_explicit(&peer->dynamic_cap_out, \
1223 memory_order_relaxed)
1224
1225 /* Statistics field */
1226 _Atomic uint32_t open_in; /* Open message input count */
1227 _Atomic uint32_t open_out; /* Open message output count */
1228 _Atomic uint32_t update_in; /* Update message input count */
1229 _Atomic uint32_t update_out; /* Update message ouput count */
1230 _Atomic time_t update_time; /* Update message received time. */
1231 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1232 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1233 _Atomic uint32_t notify_in; /* Notify input count */
1234 _Atomic uint32_t notify_out; /* Notify output count */
1235 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1236 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1237 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1238 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1239
1240 uint32_t stat_pfx_filter;
1241 uint32_t stat_pfx_aspath_loop;
1242 uint32_t stat_pfx_originator_loop;
1243 uint32_t stat_pfx_cluster_loop;
1244 uint32_t stat_pfx_nh_invalid;
1245 uint32_t stat_pfx_dup_withdraw;
1246 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1247
1248 /* BGP state count */
1249 uint32_t established; /* Established */
1250 uint32_t dropped; /* Dropped */
1251
1252 /* Update delay related fields */
1253 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1254 for EOR */
1255
1256 /* Syncronization list and time. */
1257 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1258 time_t synctime;
1259 /* timestamp when the last UPDATE msg was written */
1260 _Atomic time_t last_write;
1261 /* timestamp when the last msg was written */
1262 _Atomic time_t last_update;
1263
1264 /* Notify data. */
1265 struct bgp_notify notify;
1266
1267 /* Filter structure. */
1268 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1269
1270 /*
1271 * Parallel array to filter that indicates whether each filter
1272 * originates from a peer-group or if it is config that is specific to
1273 * this individual peer. If a filter is set independent of the
1274 * peer-group the appropriate bit should be set here. If this peer is a
1275 * peer-group, this memory region should be all zeros. The assumption
1276 * is that the default state for all flags is unset. Due to filters
1277 * having a direction (e.g. in/out/...), this array has a third
1278 * dimension for storing the overrides independently per direction.
1279 *
1280 * Notes:
1281 * - if a filter for an individual peer is unset, the corresponding
1282 * override flag is unset and the peer is considered to be back in
1283 * sync with the peer-group.
1284 * - This does *not* contain the filter values, rather it contains
1285 * whether the filter in filter (struct bgp_filter) is peer-specific.
1286 */
1287 uint8_t filter_override[AFI_MAX][SAFI_MAX][(FILTER_MAX > RMAP_MAX)
1288 ? FILTER_MAX
1289 : RMAP_MAX];
1290 #define PEER_FT_DISTRIBUTE_LIST (1 << 0) /* distribute-list */
1291 #define PEER_FT_FILTER_LIST (1 << 1) /* filter-list */
1292 #define PEER_FT_PREFIX_LIST (1 << 2) /* prefix-list */
1293 #define PEER_FT_ROUTE_MAP (1 << 3) /* route-map */
1294 #define PEER_FT_UNSUPPRESS_MAP (1 << 4) /* unsuppress-map */
1295
1296 /* ORF Prefix-list */
1297 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1298
1299 /* Text description of last attribute rcvd */
1300 char rcvd_attr_str[BUFSIZ];
1301
1302 /* Track if we printed the attribute in debugs */
1303 int rcvd_attr_printed;
1304
1305 /* Prefix count. */
1306 uint32_t pcount[AFI_MAX][SAFI_MAX];
1307
1308 /* Max prefix count. */
1309 uint32_t pmax[AFI_MAX][SAFI_MAX];
1310 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1311 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1312 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1313
1314 /* Send prefix count. */
1315 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1316
1317 /* allowas-in. */
1318 char allowas_in[AFI_MAX][SAFI_MAX];
1319
1320 /* weight */
1321 unsigned long weight[AFI_MAX][SAFI_MAX];
1322
1323 /* peer reset cause */
1324 uint8_t last_reset;
1325 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1326 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1327 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1328 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1329 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1330 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1331 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1332 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1333 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1334 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1335 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1336 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1337 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1338 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1339 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1340 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1341 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1342 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1343 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1344 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1345 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1346 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1347 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1348 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1349 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1350 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1351 #define PEER_DOWN_WAITING_NHT 27 /* Waiting for NHT to resolve */
1352 #define PEER_DOWN_NBR_ADDR 28 /* Waiting for peer IPv6 IP Addr */
1353 #define PEER_DOWN_VRF_UNINIT 29 /* Associated VRF is not init yet */
1354 #define PEER_DOWN_NOAFI_ACTIVATED 30 /* No AFI/SAFI activated for peer */
1355 #define PEER_DOWN_AS_SETS_REJECT 31 /* Reject routes with AS_SET */
1356 size_t last_reset_cause_size;
1357 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1358
1359 /* The kind of route-map Flags.*/
1360 uint16_t rmap_type;
1361 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1362 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1363 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1364 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1365 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1366 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1367 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1368 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1369 #define PEER_RMAP_TYPE_AGGREGATE (1 << 8) /* aggregate-address route-map */
1370
1371 /* peer specific BFD information */
1372 struct bfd_info *bfd_info;
1373
1374 /* hostname and domainname advertised by host */
1375 char *hostname;
1376 char *domainname;
1377
1378 /* Sender side AS path loop detection. */
1379 bool as_path_loop_detection;
1380
1381 QOBJ_FIELDS
1382 };
1383 DECLARE_QOBJ_TYPE(peer)
1384
1385 /* Inherit peer attribute from peer-group. */
1386 #define PEER_ATTR_INHERIT(peer, group, attr) \
1387 ((peer)->attr = (group)->conf->attr)
1388 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1389 do { \
1390 if ((peer)->attr) \
1391 XFREE(mt, (peer)->attr); \
1392 if ((group)->conf->attr) \
1393 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1394 else \
1395 (peer)->attr = NULL; \
1396 } while (0)
1397 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1398 do { \
1399 if ((peer)->attr) \
1400 sockunion_free((peer)->attr); \
1401 if ((group)->conf->attr) \
1402 (peer)->attr = sockunion_dup((group)->conf->attr); \
1403 else \
1404 (peer)->attr = NULL; \
1405 } while (0)
1406
1407 /* Check if suppress start/restart of sessions to peer. */
1408 #define BGP_PEER_START_SUPPRESSED(P) \
1409 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1410 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1411
1412 #define PEER_PASSWORD_MINLEN (1)
1413 #define PEER_PASSWORD_MAXLEN (80)
1414
1415 /* This structure's member directly points incoming packet data
1416 stream. */
1417 struct bgp_nlri {
1418 /* AFI. */
1419 uint16_t afi; /* iana_afi_t */
1420
1421 /* SAFI. */
1422 uint8_t safi; /* iana_safi_t */
1423
1424 /* Pointer to NLRI byte stream. */
1425 uint8_t *nlri;
1426
1427 /* Length of whole NLRI. */
1428 bgp_size_t length;
1429 };
1430
1431 /* BGP versions. */
1432 #define BGP_VERSION_4 4
1433
1434 /* Default BGP port number. */
1435 #define BGP_PORT_DEFAULT 179
1436
1437 /* BGP minimum message size. */
1438 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1439 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1440 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1441 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1442 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1443 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1444
1445 /* BGP message types. */
1446 #define BGP_MSG_OPEN 1
1447 #define BGP_MSG_UPDATE 2
1448 #define BGP_MSG_NOTIFY 3
1449 #define BGP_MSG_KEEPALIVE 4
1450 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1451 #define BGP_MSG_CAPABILITY 6
1452 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1453
1454 /* BGP open optional parameter. */
1455 #define BGP_OPEN_OPT_AUTH 1
1456 #define BGP_OPEN_OPT_CAP 2
1457
1458 /* BGP4 attribute type codes. */
1459 #define BGP_ATTR_ORIGIN 1
1460 #define BGP_ATTR_AS_PATH 2
1461 #define BGP_ATTR_NEXT_HOP 3
1462 #define BGP_ATTR_MULTI_EXIT_DISC 4
1463 #define BGP_ATTR_LOCAL_PREF 5
1464 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1465 #define BGP_ATTR_AGGREGATOR 7
1466 #define BGP_ATTR_COMMUNITIES 8
1467 #define BGP_ATTR_ORIGINATOR_ID 9
1468 #define BGP_ATTR_CLUSTER_LIST 10
1469 #define BGP_ATTR_DPA 11
1470 #define BGP_ATTR_ADVERTISER 12
1471 #define BGP_ATTR_RCID_PATH 13
1472 #define BGP_ATTR_MP_REACH_NLRI 14
1473 #define BGP_ATTR_MP_UNREACH_NLRI 15
1474 #define BGP_ATTR_EXT_COMMUNITIES 16
1475 #define BGP_ATTR_AS4_PATH 17
1476 #define BGP_ATTR_AS4_AGGREGATOR 18
1477 #define BGP_ATTR_AS_PATHLIMIT 21
1478 #define BGP_ATTR_PMSI_TUNNEL 22
1479 #define BGP_ATTR_ENCAP 23
1480 #define BGP_ATTR_LARGE_COMMUNITIES 32
1481 #define BGP_ATTR_PREFIX_SID 40
1482 #if ENABLE_BGP_VNC_ATTR
1483 #define BGP_ATTR_VNC 255
1484 #endif
1485
1486 /* BGP update origin. */
1487 #define BGP_ORIGIN_IGP 0
1488 #define BGP_ORIGIN_EGP 1
1489 #define BGP_ORIGIN_INCOMPLETE 2
1490
1491 /* BGP notify message codes. */
1492 #define BGP_NOTIFY_HEADER_ERR 1
1493 #define BGP_NOTIFY_OPEN_ERR 2
1494 #define BGP_NOTIFY_UPDATE_ERR 3
1495 #define BGP_NOTIFY_HOLD_ERR 4
1496 #define BGP_NOTIFY_FSM_ERR 5
1497 #define BGP_NOTIFY_CEASE 6
1498 #define BGP_NOTIFY_CAPABILITY_ERR 7
1499
1500 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1501
1502 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1503 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1504 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1505 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1506
1507 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1508 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1509 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1510 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1511 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1512 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1513 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1514 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1515 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1516
1517 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1518 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1519 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1520 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1521 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1522 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1523 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1524 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1525 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1526 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1527 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1528 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1529
1530 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1531 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1532 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1533 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1534 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1535 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1536 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1537 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1538 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1539
1540 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1541 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1542 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1543 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1544
1545 /* BGP finite state machine status. */
1546 #define Idle 1
1547 #define Connect 2
1548 #define Active 3
1549 #define OpenSent 4
1550 #define OpenConfirm 5
1551 #define Established 6
1552 #define Clearing 7
1553 #define Deleted 8
1554 #define BGP_STATUS_MAX 9
1555
1556 /* BGP finite state machine events. */
1557 #define BGP_Start 1
1558 #define BGP_Stop 2
1559 #define TCP_connection_open 3
1560 #define TCP_connection_closed 4
1561 #define TCP_connection_open_failed 5
1562 #define TCP_fatal_error 6
1563 #define ConnectRetry_timer_expired 7
1564 #define Hold_Timer_expired 8
1565 #define KeepAlive_timer_expired 9
1566 #define Receive_OPEN_message 10
1567 #define Receive_KEEPALIVE_message 11
1568 #define Receive_UPDATE_message 12
1569 #define Receive_NOTIFICATION_message 13
1570 #define Clearing_Completed 14
1571 #define BGP_EVENTS_MAX 15
1572
1573 /* BGP timers default value. */
1574 #define BGP_INIT_START_TIMER 1
1575 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1576 * version-/profile-specific values. The values here do not matter, they only
1577 * exist to provide a clear layering separation between core and CLI.
1578 */
1579 #define BGP_DEFAULT_HOLDTIME 180
1580 #define BGP_DEFAULT_KEEPALIVE 60
1581 #define BGP_DEFAULT_CONNECT_RETRY 120
1582
1583 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1584 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1585
1586 /* BGP default local preference. */
1587 #define BGP_DEFAULT_LOCAL_PREF 100
1588
1589 /* BGP local-preference to send when 'bgp graceful-shutdown'
1590 * is configured */
1591 #define BGP_GSHUT_LOCAL_PREF 0
1592
1593 /* BGP default subgroup packet queue max . */
1594 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1595
1596 /* BGP graceful restart */
1597 #define BGP_DEFAULT_RESTART_TIME 120
1598 #define BGP_DEFAULT_STALEPATH_TIME 360
1599 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1600 #define BGP_DEFAULT_RIB_STALE_TIME 500
1601
1602 /* BGP uptime string length. */
1603 #define BGP_UPTIME_LEN 25
1604
1605 /* Default configuration settings for bgpd. */
1606 #define BGP_VTY_PORT 2605
1607 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1608
1609 /* BGP Dynamic Neighbors feature */
1610 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1611 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1612 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1613
1614 /* Flag for peer_clear_soft(). */
1615 enum bgp_clear_type {
1616 BGP_CLEAR_SOFT_NONE,
1617 BGP_CLEAR_SOFT_OUT,
1618 BGP_CLEAR_SOFT_IN,
1619 BGP_CLEAR_SOFT_BOTH,
1620 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1621 };
1622
1623 /* Macros. */
1624 #define BGP_INPUT(P) ((P)->curr)
1625 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1626 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1627 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1628
1629 /* BGP error codes. */
1630 #define BGP_SUCCESS 0
1631 #define BGP_CREATED 1
1632 #define BGP_ERR_INVALID_VALUE -1
1633 #define BGP_ERR_INVALID_FLAG -2
1634 #define BGP_ERR_INVALID_AS -3
1635 #define BGP_ERR_INVALID_BGP -4
1636 #define BGP_ERR_PEER_GROUP_MEMBER -5
1637 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1638 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1639 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1640 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1641 #define BGP_ERR_AS_MISMATCH -12
1642 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1643 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1644 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1645 #define BGP_ERR_NOT_INTERNAL_PEER -16
1646 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1647 #define BGP_ERR_AF_UNCONFIGURED -18
1648 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1649 #define BGP_ERR_INSTANCE_MISMATCH -20
1650 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1651 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1652 #define BGP_ERR_TCPSIG_FAILED -23
1653 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1654 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1655 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1656 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1657 #define BGP_ERR_AS_OVERRIDE -28
1658 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1659 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1660 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1661 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1662 #define BGP_ERR_MAX -33
1663 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1664 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1665
1666 /* BGP GR ERRORS */
1667 #define BGP_ERR_GR_INVALID_CMD -36
1668 #define BGP_ERR_GR_OPERATION_FAILED -37
1669 #define BGP_GR_NO_OPERATION -38
1670
1671 /*
1672 * Enumeration of different policy kinds a peer can be configured with.
1673 */
1674 typedef enum {
1675 BGP_POLICY_ROUTE_MAP,
1676 BGP_POLICY_FILTER_LIST,
1677 BGP_POLICY_PREFIX_LIST,
1678 BGP_POLICY_DISTRIBUTE_LIST,
1679 } bgp_policy_type_e;
1680
1681 /* peer_flag_change_type. */
1682 enum peer_change_type {
1683 peer_change_none,
1684 peer_change_reset,
1685 peer_change_reset_in,
1686 peer_change_reset_out,
1687 };
1688
1689 extern struct bgp_master *bm;
1690 extern unsigned int multipath_num;
1691
1692 /* Prototypes. */
1693 extern void bgp_terminate(void);
1694 extern void bgp_reset(void);
1695 extern time_t bgp_clock(void);
1696 extern void bgp_zclient_reset(void);
1697 extern struct bgp *bgp_get_default(void);
1698 extern struct bgp *bgp_lookup(as_t, const char *);
1699 extern struct bgp *bgp_lookup_by_name(const char *);
1700 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1701 extern struct bgp *bgp_get_evpn(void);
1702 extern void bgp_set_evpn(struct bgp *bgp);
1703 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1704 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1705 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1706 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1707 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1708 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1709 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1710 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1711 union sockunion *,
1712 struct peer_group *);
1713 extern struct prefix *
1714 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1715 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1716 struct prefix *,
1717 struct prefix **);
1718 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1719 union sockunion *);
1720
1721 /*
1722 * Peers are incredibly easy to memory leak
1723 * due to the various ways that they are actually used
1724 * Provide some functionality to debug locks and unlocks
1725 */
1726 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1727 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1728 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1729 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1730
1731 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1732 extern int peer_active(struct peer *);
1733 extern int peer_active_nego(struct peer *);
1734 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1735 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1736 as_t, as_t, int, afi_t, safi_t,
1737 struct peer_group *);
1738 extern struct peer *peer_create_accept(struct bgp *);
1739 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1740 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1741 json_object *json);
1742
1743 extern int bgp_config_write(struct vty *);
1744
1745 extern void bgp_master_init(struct thread_master *master,
1746 const int buffer_size);
1747
1748 extern void bgp_init(unsigned short instance);
1749 extern void bgp_pthreads_run(void);
1750 extern void bgp_pthreads_finish(void);
1751 extern void bgp_route_map_init(void);
1752 extern void bgp_session_reset(struct peer *);
1753
1754 extern int bgp_option_set(int);
1755 extern int bgp_option_unset(int);
1756 extern int bgp_option_check(int);
1757
1758 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1759 extern void bgp_instance_up(struct bgp *);
1760 extern void bgp_instance_down(struct bgp *);
1761 extern int bgp_delete(struct bgp *);
1762
1763 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1764 vrf_id_t old_vrf_id, bool create);
1765
1766 extern int bgp_flag_set(struct bgp *, int);
1767 extern int bgp_flag_unset(struct bgp *, int);
1768 extern int bgp_flag_check(struct bgp *, int);
1769
1770 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1771 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1772
1773 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1774 extern int bgp_cluster_id_unset(struct bgp *);
1775
1776 extern int bgp_confederation_id_set(struct bgp *, as_t);
1777 extern int bgp_confederation_id_unset(struct bgp *);
1778 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1779
1780 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1781 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1782
1783 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
1784 uint32_t connect_retry);
1785 extern int bgp_timers_unset(struct bgp *);
1786
1787 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1788 extern int bgp_default_local_preference_unset(struct bgp *);
1789
1790 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1791 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1792
1793 extern int bgp_listen_limit_set(struct bgp *, int);
1794 extern int bgp_listen_limit_unset(struct bgp *);
1795
1796 extern int bgp_update_delay_active(struct bgp *);
1797 extern int bgp_update_delay_configured(struct bgp *);
1798 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1799 extern void peer_as_change(struct peer *, as_t, int);
1800 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1801 int, afi_t, safi_t);
1802 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1803 extern int peer_delete(struct peer *peer);
1804 extern int peer_notify_unconfig(struct peer *peer);
1805 extern int peer_group_delete(struct peer_group *);
1806 extern int peer_group_remote_as_delete(struct peer_group *);
1807 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1808 extern int peer_group_notify_unconfig(struct peer_group *group);
1809
1810 extern int peer_activate(struct peer *, afi_t, safi_t);
1811 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1812 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1813
1814 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1815 struct peer_group *, as_t *);
1816
1817 extern int peer_flag_set(struct peer *, uint32_t);
1818 extern int peer_flag_unset(struct peer *, uint32_t);
1819 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1820
1821 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1822 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1823 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1824 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1825 uint32_t flag);
1826 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1827 enum peer_change_type type);
1828
1829 extern int peer_ebgp_multihop_set(struct peer *, int);
1830 extern int peer_ebgp_multihop_unset(struct peer *);
1831 extern int is_ebgp_multihop_configured(struct peer *peer);
1832
1833 extern int peer_description_set(struct peer *, const char *);
1834 extern int peer_description_unset(struct peer *);
1835
1836 extern int peer_update_source_if_set(struct peer *, const char *);
1837 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1838 extern int peer_update_source_unset(struct peer *);
1839
1840 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1841 const char *rmap,
1842 struct route_map *route_map);
1843 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1844
1845 extern int peer_port_set(struct peer *, uint16_t);
1846 extern int peer_port_unset(struct peer *);
1847
1848 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1849 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1850
1851 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1852 uint32_t holdtime);
1853 extern int peer_timers_unset(struct peer *);
1854
1855 extern int peer_timers_connect_set(struct peer *, uint32_t);
1856 extern int peer_timers_connect_unset(struct peer *);
1857
1858 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1859 extern int peer_advertise_interval_unset(struct peer *);
1860
1861 extern void peer_interface_set(struct peer *, const char *);
1862 extern void peer_interface_unset(struct peer *);
1863
1864 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1865 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1866
1867 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1868 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1869
1870 extern int peer_local_as_set(struct peer *, as_t, int, int);
1871 extern int peer_local_as_unset(struct peer *);
1872
1873 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1874 const char *);
1875 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1876
1877 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1878 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1879
1880 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1881 const char *name, struct route_map *route_map);
1882 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1883
1884 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1885 const char *name,
1886 struct route_map *route_map);
1887
1888 extern int peer_password_set(struct peer *, const char *);
1889 extern int peer_password_unset(struct peer *);
1890
1891 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1892
1893 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1894 uint8_t, int, uint16_t);
1895 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1896
1897 extern int peer_clear(struct peer *, struct listnode **);
1898 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1899
1900 extern int peer_ttl_security_hops_set(struct peer *, int);
1901 extern int peer_ttl_security_hops_unset(struct peer *);
1902
1903 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1904 extern int peer_tx_shutdown_message_unset(struct peer *);
1905
1906 extern int bgp_route_map_update_timer(struct thread *thread);
1907 extern void bgp_route_map_terminate(void);
1908
1909 extern int peer_cmp(struct peer *p1, struct peer *p2);
1910
1911 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1912 afi_t *afi, safi_t *safi);
1913 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1914 iana_afi_t *pkt_afi,
1915 iana_safi_t *pkt_safi);
1916
1917 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1918 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1919 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1920
1921 extern void bgp_close(void);
1922 extern void bgp_free(struct bgp *);
1923 void bgp_gr_apply_running_config(void);
1924
1925 /* BGP GR */
1926 int bgp_global_gr_init(struct bgp *bgp);
1927 int bgp_peer_gr_init(struct peer *peer);
1928
1929
1930 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA( \
1931 _bgp, _peer_list) \
1932 do { \
1933 struct peer *peer_loop; \
1934 bool gr_router_detected = false; \
1935 struct listnode *node = {0}; \
1936 struct listnode *nnode = {0}; \
1937 for (ALL_LIST_ELEMENTS( \
1938 _peer_list, node, \
1939 nnode, peer_loop)) { \
1940 if (CHECK_FLAG( \
1941 peer_loop->flags, \
1942 PEER_FLAG_GRACEFUL_RESTART)) \
1943 gr_router_detected = true; \
1944 } \
1945 if (gr_router_detected && \
1946 _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
1947 bgp_zebra_send_capabilities(_bgp, false); \
1948 } else if (!gr_router_detected && \
1949 _bgp->present_zebra_gr_state == ZEBRA_GR_ENABLE) { \
1950 bgp_zebra_send_capabilities(_bgp, true); \
1951 } \
1952 } while (0)
1953
1954 static inline struct bgp *bgp_lock(struct bgp *bgp)
1955 {
1956 bgp->lock++;
1957 return bgp;
1958 }
1959
1960 static inline void bgp_unlock(struct bgp *bgp)
1961 {
1962 assert(bgp->lock > 0);
1963 if (--bgp->lock == 0)
1964 bgp_free(bgp);
1965 }
1966
1967 static inline int afindex(afi_t afi, safi_t safi)
1968 {
1969 switch (afi) {
1970 case AFI_IP:
1971 switch (safi) {
1972 case SAFI_UNICAST:
1973 return BGP_AF_IPV4_UNICAST;
1974 break;
1975 case SAFI_MULTICAST:
1976 return BGP_AF_IPV4_MULTICAST;
1977 break;
1978 case SAFI_LABELED_UNICAST:
1979 return BGP_AF_IPV4_LBL_UNICAST;
1980 break;
1981 case SAFI_MPLS_VPN:
1982 return BGP_AF_IPV4_VPN;
1983 break;
1984 case SAFI_ENCAP:
1985 return BGP_AF_IPV4_ENCAP;
1986 break;
1987 case SAFI_FLOWSPEC:
1988 return BGP_AF_IPV4_FLOWSPEC;
1989 default:
1990 return BGP_AF_MAX;
1991 break;
1992 }
1993 break;
1994 case AFI_IP6:
1995 switch (safi) {
1996 case SAFI_UNICAST:
1997 return BGP_AF_IPV6_UNICAST;
1998 break;
1999 case SAFI_MULTICAST:
2000 return BGP_AF_IPV6_MULTICAST;
2001 break;
2002 case SAFI_LABELED_UNICAST:
2003 return BGP_AF_IPV6_LBL_UNICAST;
2004 break;
2005 case SAFI_MPLS_VPN:
2006 return BGP_AF_IPV6_VPN;
2007 break;
2008 case SAFI_ENCAP:
2009 return BGP_AF_IPV6_ENCAP;
2010 break;
2011 case SAFI_FLOWSPEC:
2012 return BGP_AF_IPV6_FLOWSPEC;
2013 default:
2014 return BGP_AF_MAX;
2015 break;
2016 }
2017 break;
2018 case AFI_L2VPN:
2019 switch (safi) {
2020 case SAFI_EVPN:
2021 return BGP_AF_L2VPN_EVPN;
2022 break;
2023 default:
2024 return BGP_AF_MAX;
2025 break;
2026 }
2027 default:
2028 return BGP_AF_MAX;
2029 break;
2030 }
2031 }
2032
2033 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2034 static inline int peer_group_active(struct peer *peer)
2035 {
2036 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2037 return 1;
2038 return 0;
2039 }
2040
2041 /* If peer is negotiated at least one address family return 1. */
2042 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2043 {
2044 if (peer->afc_nego[afi][SAFI_UNICAST]
2045 || peer->afc_nego[afi][SAFI_MULTICAST]
2046 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2047 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2048 || peer->afc_nego[afi][SAFI_ENCAP]
2049 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2050 || peer->afc_nego[afi][SAFI_EVPN])
2051 return 1;
2052 return 0;
2053 }
2054
2055 /* If at least one address family activated for group, return 1. */
2056 static inline int peer_group_af_configured(struct peer_group *group)
2057 {
2058 struct peer *peer = group->conf;
2059
2060 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2061 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2062 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2063 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2064 || peer->afc[AFI_IP6][SAFI_UNICAST]
2065 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2066 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2067 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2068 || peer->afc[AFI_IP6][SAFI_ENCAP]
2069 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2070 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2071 return 1;
2072 return 0;
2073 }
2074
2075 static inline char *timestamp_string(time_t ts)
2076 {
2077 time_t tbuf;
2078 tbuf = time(NULL) - (bgp_clock() - ts);
2079 return ctime(&tbuf);
2080 }
2081
2082 static inline int peer_established(struct peer *peer)
2083 {
2084 if (peer->status == Established)
2085 return 1;
2086 return 0;
2087 }
2088
2089 static inline int peer_dynamic_neighbor(struct peer *peer)
2090 {
2091 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
2092 }
2093
2094 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2095 {
2096 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2097 }
2098
2099 /* Lookup VRF for BGP instance based on its type. */
2100 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2101 {
2102 struct vrf *vrf;
2103
2104 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2105 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2106 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2107 vrf = vrf_lookup_by_name(bgp->name);
2108 else
2109 vrf = NULL;
2110
2111 return vrf;
2112 }
2113
2114 /* Link BGP instance to VRF. */
2115 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2116 {
2117 bgp->vrf_id = vrf->vrf_id;
2118 if (vrf->info != (void *)bgp)
2119 vrf->info = (void *)bgp_lock(bgp);
2120 }
2121
2122 /* Unlink BGP instance from VRF. */
2123 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2124 {
2125 if (vrf->info == (void *)bgp) {
2126 vrf->info = NULL;
2127 bgp_unlock(bgp);
2128 }
2129 bgp->vrf_id = VRF_UNKNOWN;
2130 }
2131
2132 extern void bgp_unset_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
2133
2134 /* For benefit of rfapi */
2135 extern struct peer *peer_new(struct bgp *bgp);
2136
2137 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2138 const char *ip_str, bool use_json);
2139
2140 /* Hooks */
2141 DECLARE_HOOK(peer_status_changed, (struct peer * peer), (peer))
2142 void peer_nsf_stop(struct peer *peer);
2143
2144 #endif /* _QUAGGA_BGPD_H */
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