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zebra: add support for DF delay timer
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1 /* BGP message definition header.
2 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef _QUAGGA_BGPD_H
22 #define _QUAGGA_BGPD_H
23
24 #include "qobj.h"
25 #include <pthread.h>
26
27 #include "hook.h"
28 #include "frr_pthread.h"
29 #include "lib/json.h"
30 #include "vrf.h"
31 #include "vty.h"
32 #include "iana_afi.h"
33
34 /* For union sockunion. */
35 #include "queue.h"
36 #include "sockunion.h"
37 #include "routemap.h"
38 #include "linklist.h"
39 #include "defaults.h"
40 #include "bgp_memory.h"
41 #include "bitfield.h"
42 #include "vxlan.h"
43 #include "bgp_labelpool.h"
44 #include "bgp_addpath_types.h"
45 #include "bgp_nexthop.h"
46
47 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
48 #define BGP_PEER_MAX_HASH_SIZE 16384
49
50 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
51 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
52
53 struct update_subgroup;
54 struct bpacket;
55 struct bgp_pbr_config;
56
57 /*
58 * Allow the neighbor XXXX remote-as to take internal or external
59 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
60 * behavior
61 * in the system.
62 */
63 enum { AS_UNSPECIFIED = 0,
64 AS_SPECIFIED,
65 AS_INTERNAL,
66 AS_EXTERNAL,
67 };
68
69 /* Zebra Gracaful Restart states */
70 enum zebra_gr_mode {
71 ZEBRA_GR_DISABLE = 0,
72 ZEBRA_GR_ENABLE
73 };
74
75 /* Typedef BGP specific types. */
76 typedef uint32_t as_t;
77 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
78 typedef uint16_t bgp_size_t;
79
80 #define max(a, b) \
81 ({ \
82 __typeof__(a) _a = (a); \
83 __typeof__(b) _b = (b); \
84 _a > _b ? _a : _b; \
85 })
86
87 enum bgp_af_index {
88 BGP_AF_START,
89 BGP_AF_IPV4_UNICAST = BGP_AF_START,
90 BGP_AF_IPV4_MULTICAST,
91 BGP_AF_IPV4_VPN,
92 BGP_AF_IPV6_UNICAST,
93 BGP_AF_IPV6_MULTICAST,
94 BGP_AF_IPV6_VPN,
95 BGP_AF_IPV4_ENCAP,
96 BGP_AF_IPV6_ENCAP,
97 BGP_AF_L2VPN_EVPN,
98 BGP_AF_IPV4_LBL_UNICAST,
99 BGP_AF_IPV6_LBL_UNICAST,
100 BGP_AF_IPV4_FLOWSPEC,
101 BGP_AF_IPV6_FLOWSPEC,
102 BGP_AF_MAX
103 };
104
105 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
106
107 #define FOREACH_SAFI(safi) \
108 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
109
110 extern struct frr_pthread *bgp_pth_io;
111 extern struct frr_pthread *bgp_pth_ka;
112
113 /* BGP master for system wide configurations and variables. */
114 struct bgp_master {
115 /* BGP instance list. */
116 struct list *bgp;
117
118 /* BGP thread master. */
119 struct thread_master *master;
120
121 /* Listening sockets */
122 struct list *listen_sockets;
123
124 /* BGP port number. */
125 uint16_t port;
126
127 /* Listener address */
128 char *address;
129
130 /* The Mac table */
131 struct hash *self_mac_hash;
132
133 /* BGP start time. */
134 time_t start_time;
135
136 /* Various BGP global configuration. */
137 uint8_t options;
138 #define BGP_OPT_NO_FIB (1 << 0)
139 #define BGP_OPT_NO_LISTEN (1 << 1)
140 #define BGP_OPT_NO_ZEBRA (1 << 2)
141
142 uint64_t updgrp_idspace;
143 uint64_t subgrp_idspace;
144
145 /* timer to dampen route map changes */
146 struct thread *t_rmap_update; /* Handle route map updates */
147 uint32_t rmap_update_timer; /* Route map update timer */
148 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
149
150 /* Id space for automatic RD derivation for an EVI/VRF */
151 bitfield_t rd_idspace;
152
153 /* dynamic mpls label allocation pool */
154 struct labelpool labelpool;
155
156 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
157 struct bgp* bgp_evpn;
158
159 /* How big should we set the socket buffer size */
160 uint32_t socket_buffer;
161
162 /* Should we do wait for fib install globally? */
163 bool wait_for_fib;
164
165 /* EVPN multihoming */
166 struct bgp_evpn_mh_info *mh_info;
167
168 /* global update-delay timer values */
169 uint16_t v_update_delay;
170 uint16_t v_establish_wait;
171
172 uint32_t flags;
173 #define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
174 #define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)
175
176 bool terminating; /* global flag that sigint terminate seen */
177 QOBJ_FIELDS
178 };
179 DECLARE_QOBJ_TYPE(bgp_master)
180
181 /* BGP route-map structure. */
182 struct bgp_rmap {
183 char *name;
184 struct route_map *map;
185 };
186
187 struct bgp_redist {
188 unsigned short instance;
189
190 /* BGP redistribute metric configuration. */
191 uint8_t redist_metric_flag;
192 uint32_t redist_metric;
193
194 /* BGP redistribute route-map. */
195 struct bgp_rmap rmap;
196 };
197
198 typedef enum {
199 BGP_VPN_POLICY_DIR_FROMVPN = 0,
200 BGP_VPN_POLICY_DIR_TOVPN = 1,
201 BGP_VPN_POLICY_DIR_MAX = 2
202 } vpn_policy_direction_t;
203
204 struct vpn_policy {
205 struct bgp *bgp; /* parent */
206 afi_t afi;
207 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
208 struct ecommunity *import_redirect_rtlist;
209 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
210 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
211
212 /* should be mpls_label_t? */
213 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
214 uint32_t tovpn_zebra_vrf_label_last_sent;
215 struct prefix_rd tovpn_rd;
216 struct prefix tovpn_nexthop; /* unset => set to 0 */
217 uint32_t flags;
218 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
219 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
220 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
221
222 /*
223 * If we are importing another vrf into us keep a list of
224 * vrf names that are being imported into us.
225 */
226 struct list *import_vrf;
227
228 /*
229 * if we are being exported to another vrf keep a list of
230 * vrf names that we are being exported to.
231 */
232 struct list *export_vrf;
233 };
234
235 /*
236 * Type of 'struct bgp'.
237 * - Default: The default instance
238 * - VRF: A specific (non-default) VRF
239 * - View: An instance used for route exchange
240 * The "default" instance is treated separately to simplify the code. Note
241 * that if deployed in a Multi-VRF environment, it may not exist.
242 */
243 enum bgp_instance_type {
244 BGP_INSTANCE_TYPE_DEFAULT,
245 BGP_INSTANCE_TYPE_VRF,
246 BGP_INSTANCE_TYPE_VIEW
247 };
248
249 #define BGP_SEND_EOR(bgp, afi, safi) \
250 (!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
251 && ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
252 || (bgp->gr_info[afi][safi].eor_required \
253 == bgp->gr_info[afi][safi].eor_received)))
254
255 /* BGP GR Global ds */
256
257 #define BGP_GLOBAL_GR_MODE 4
258 #define BGP_GLOBAL_GR_EVENT_CMD 4
259
260 /* Graceful restart selection deferral timer info */
261 struct graceful_restart_info {
262 /* Count of EOR message expected */
263 uint32_t eor_required;
264 /* Count of EOR received */
265 uint32_t eor_received;
266 /* Deferral Timer */
267 struct thread *t_select_deferral;
268 /* Routes Deferred */
269 uint32_t gr_deferred;
270 /* Best route select */
271 struct thread *t_route_select;
272 /* AFI, SAFI enabled */
273 bool af_enabled[AFI_MAX][SAFI_MAX];
274 /* Route update completed */
275 bool route_sync[AFI_MAX][SAFI_MAX];
276 };
277
278 enum global_mode {
279 GLOBAL_HELPER = 0, /* This is the default mode */
280 GLOBAL_GR,
281 GLOBAL_DISABLE,
282 GLOBAL_INVALID
283 };
284
285 enum global_gr_command {
286 GLOBAL_GR_CMD = 0,
287 NO_GLOBAL_GR_CMD,
288 GLOBAL_DISABLE_CMD,
289 NO_GLOBAL_DISABLE_CMD
290 };
291
292 #define BGP_GR_SUCCESS 0
293 #define BGP_GR_FAILURE 1
294
295 /* Handling of BGP link bandwidth (LB) on receiver - whether and how to
296 * do weighted ECMP. Note: This applies after multipath computation.
297 */
298 enum bgp_link_bw_handling {
299 /* Do ECMP if some paths don't have LB - default */
300 BGP_LINK_BW_ECMP,
301 /* Completely ignore LB, just do regular ECMP */
302 BGP_LINK_BW_IGNORE_BW,
303 /* Skip paths without LB, do wECMP on others */
304 BGP_LINK_BW_SKIP_MISSING,
305 /* Do wECMP with default weight for paths not having LB */
306 BGP_LINK_BW_DEFWT_4_MISSING
307 };
308
309 RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
310 RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
311
312 /* BGP instance structure. */
313 struct bgp {
314 /* AS number of this BGP instance. */
315 as_t as;
316
317 /* Name of this BGP instance. */
318 char *name;
319 char *name_pretty; /* printable "VRF|VIEW name|default" */
320
321 /* Type of instance and VRF id. */
322 enum bgp_instance_type inst_type;
323 vrf_id_t vrf_id;
324
325 /* Reference count to allow peer_delete to finish after bgp_delete */
326 int lock;
327
328 /* Self peer. */
329 struct peer *peer_self;
330
331 /* BGP peer. */
332 struct list *peer;
333 struct hash *peerhash;
334
335 /* BGP peer group. */
336 struct list *group;
337
338 /* The maximum number of BGP dynamic neighbors that can be created */
339 int dynamic_neighbors_limit;
340
341 /* The current number of BGP dynamic neighbors */
342 int dynamic_neighbors_count;
343
344 struct hash *update_groups[BGP_AF_MAX];
345
346 /*
347 * Global statistics for update groups.
348 */
349 struct {
350 uint32_t join_events;
351 uint32_t prune_events;
352 uint32_t merge_events;
353 uint32_t split_events;
354 uint32_t updgrp_switch_events;
355 uint32_t peer_refreshes_combined;
356 uint32_t adj_count;
357 uint32_t merge_checks_triggered;
358
359 uint32_t updgrps_created;
360 uint32_t updgrps_deleted;
361 uint32_t subgrps_created;
362 uint32_t subgrps_deleted;
363 } update_group_stats;
364
365 /* BGP configuration. */
366 uint16_t config;
367 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
368 #define BGP_CONFIG_CONFEDERATION (1 << 1)
369
370 /* BGP router identifier. */
371 struct in_addr router_id;
372 struct in_addr router_id_static;
373 struct in_addr router_id_zebra;
374
375 /* BGP route reflector cluster ID. */
376 struct in_addr cluster_id;
377
378 /* BGP confederation information. */
379 as_t confed_id;
380 as_t *confed_peers;
381 int confed_peers_cnt;
382
383 struct thread
384 *t_startup; /* start-up timer on only once at the beginning */
385
386 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
387 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
388 uint32_t maxmed_onstartup_value; /* Max-med value when active on
389 start-up */
390 struct thread
391 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
392 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
393
394 bool v_maxmed_admin; /* true/false if max-med administrative is on/off
395 */
396 #define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
397 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
398 */
399 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
400
401 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
402 uint32_t maxmed_value; /* Max-med value when its active */
403
404 /* BGP update delay on startup */
405 struct thread *t_update_delay;
406 struct thread *t_establish_wait;
407 uint8_t update_delay_over;
408 uint8_t main_zebra_update_hold;
409 uint8_t main_peers_update_hold;
410 uint16_t v_update_delay;
411 uint16_t v_establish_wait;
412 char update_delay_begin_time[64];
413 char update_delay_end_time[64];
414 char update_delay_zebra_resume_time[64];
415 char update_delay_peers_resume_time[64];
416 uint32_t established;
417 uint32_t restarted_peers;
418 uint32_t implicit_eors;
419 uint32_t explicit_eors;
420 #define BGP_UPDATE_DELAY_DEF 0
421 #define BGP_UPDATE_DELAY_MIN 0
422 #define BGP_UPDATE_DELAY_MAX 3600
423
424 /* Reference bandwidth for BGP link-bandwidth. Used when
425 * the LB value has to be computed based on some other
426 * factor (e.g., number of multipaths for the prefix)
427 * Value is in Mbps
428 */
429 uint32_t lb_ref_bw;
430 #define BGP_LINK_BW_REF_BW 1
431
432 /* BGP flags. */
433 uint32_t flags;
434 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
435 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
436 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
437 #define BGP_FLAG_MED_CONFED (1 << 3)
438 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
439 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
440 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
441 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
442 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
443 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
444 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
445
446 /* This flag is set when we have full BGP Graceful-Restart mode enable */
447 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
448
449 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
450 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
451 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
452 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
453 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
454 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
455 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
456 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
457 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
458 #define BGP_FLAG_DELETE_IN_PROGRESS (1 << 22)
459 #define BGP_FLAG_SELECT_DEFER_DISABLE (1 << 23)
460 #define BGP_FLAG_GR_DISABLE_EOR (1 << 24)
461 #define BGP_FLAG_EBGP_REQUIRES_POLICY (1 << 25)
462 #define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1 << 26)
463
464 /* This flag is set if the instance is in administrative shutdown */
465 #define BGP_FLAG_SHUTDOWN (1 << 27)
466 #define BGP_FLAG_SUPPRESS_FIB_PENDING (1 << 28)
467
468 enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
469 [BGP_GLOBAL_GR_EVENT_CMD];
470 enum global_mode global_gr_present_state;
471
472 /* This variable stores the current Graceful Restart state of Zebra
473 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
474 */
475 enum zebra_gr_mode present_zebra_gr_state;
476
477 /* BGP Per AF flags */
478 uint16_t af_flags[AFI_MAX][SAFI_MAX];
479 #define BGP_CONFIG_DAMPENING (1 << 0)
480 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
481 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
482 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
483 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
484 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
485 /* import/export between address families */
486 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
487 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
488 /* vrf-route leaking flags */
489 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
490 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
491
492 /* BGP per AF peer count */
493 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
494
495 /* Tree for next-hop lookup cache. */
496 struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
497
498 /* Tree for import-check */
499 struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
500
501 struct bgp_table *connected_table[AFI_MAX];
502
503 struct hash *address_hash;
504
505 /* DB for all local tunnel-ips - used mainly for martian checks
506 Currently it only has all VxLan tunnel IPs*/
507 struct hash *tip_hash;
508
509 /* Static route configuration. */
510 struct bgp_table *route[AFI_MAX][SAFI_MAX];
511
512 /* Aggregate address configuration. */
513 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
514
515 /* BGP routing information base. */
516 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
517
518 /* BGP table route-map. */
519 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
520
521 /* BGP redistribute configuration. */
522 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
523
524 /* Allocate MPLS labels */
525 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
526
527 /* Allocate hash entries to store policy routing information
528 * The hash are used to host pbr rules somewhere.
529 * Actually, pbr will only be used by flowspec
530 * those hash elements will have relationship together as
531 * illustrated in below diagram:
532 *
533 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
534 * <----- pbr_match j <--- pbr_match_entry 1..m
535 * <----- pbr_rule k
536 *
537 * - here in BGP structure, the list of match and actions will
538 * stand for the list of ipset sets, and table_ids in the kernel
539 * - the arrow above between pbr_match and pbr_action indicate
540 * that a backpointer permits match to find the action
541 * - the arrow betwen match_entry and match is a hash list
542 * contained in match, that lists the whole set of entries
543 */
544 struct hash *pbr_match_hash;
545 struct hash *pbr_rule_hash;
546 struct hash *pbr_action_hash;
547
548 /* timer to re-evaluate neighbor default-originate route-maps */
549 struct thread *t_rmap_def_originate_eval;
550 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
551
552 /* BGP distance configuration. */
553 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
554 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
555 uint8_t distance_local[AFI_MAX][SAFI_MAX];
556
557 /* BGP default local-preference. */
558 uint32_t default_local_pref;
559
560 /* BGP default subgroup pkt queue max */
561 uint32_t default_subgroup_pkt_queue_max;
562
563 /* BGP default timer. */
564 uint32_t default_holdtime;
565 uint32_t default_keepalive;
566 uint32_t default_connect_retry;
567 uint32_t default_delayopen;
568
569 /* BGP graceful restart */
570 uint32_t restart_time;
571 uint32_t stalepath_time;
572 uint32_t select_defer_time;
573 struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
574 uint32_t rib_stale_time;
575
576 #define BGP_ROUTE_SELECT_DELAY 1
577 #define BGP_MAX_BEST_ROUTE_SELECT 10000
578 /* Maximum-paths configuration */
579 struct bgp_maxpaths_cfg {
580 uint16_t maxpaths_ebgp;
581 uint16_t maxpaths_ibgp;
582 uint16_t ibgp_flags;
583 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
584 } maxpaths[AFI_MAX][SAFI_MAX];
585
586 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
587 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
588
589 /* Automatic coalesce adjust on/off */
590 bool heuristic_coalesce;
591 /* Actual coalesce time */
592 uint32_t coalesce_time;
593
594 /* Auto-shutdown new peers */
595 bool autoshutdown;
596
597 struct bgp_addpath_bgp_data tx_addpath;
598
599 #ifdef ENABLE_BGP_VNC
600 struct rfapi_cfg *rfapi_cfg;
601 struct rfapi *rfapi;
602 #endif
603
604 /* EVPN related information */
605
606 /* EVI hash table */
607 struct hash *vnihash;
608
609 /* EVPN enable - advertise gateway macip routes */
610 int advertise_gw_macip;
611
612 /* EVPN enable - advertise local VNIs and their MACs etc. */
613 int advertise_all_vni;
614
615 /* draft-ietf-idr-deprecate-as-set-confed-set
616 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
617 */
618 bool reject_as_sets;
619
620 struct bgp_evpn_info *evpn_info;
621
622 /* EVPN - use RFC 8365 to auto-derive RT */
623 int advertise_autort_rfc8365;
624
625 /*
626 * Flooding mechanism for BUM packets for VxLAN-EVPN.
627 */
628 enum vxlan_flood_control vxlan_flood_ctrl;
629
630 /* Hash table of Import RTs to EVIs */
631 struct hash *import_rt_hash;
632
633 /* Hash table of VRF import RTs to VRFs */
634 struct hash *vrf_import_rt_hash;
635
636 /* L3-VNI corresponding to this vrf */
637 vni_t l3vni;
638
639 /* router-mac to be used in mac-ip routes for this vrf */
640 struct ethaddr rmac;
641
642 /* originator ip - to be used as NH for type-5 routes */
643 struct in_addr originator_ip;
644
645 /* SVI associated with the L3-VNI corresponding to this vrf */
646 ifindex_t l3vni_svi_ifindex;
647
648 /* RB tree of ES-VRFs */
649 struct bgp_es_vrf_rb_head es_vrf_rb_tree;
650
651 /* vrf flags */
652 uint32_t vrf_flags;
653 #define BGP_VRF_AUTO (1 << 0)
654 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
655 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
656 #define BGP_VRF_RD_CFGD (1 << 3)
657 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
658
659 /* unique ID for auto derivation of RD for this vrf */
660 uint16_t vrf_rd_id;
661
662 /* Automatically derived RD for this VRF */
663 struct prefix_rd vrf_prd_auto;
664
665 /* RD for this VRF */
666 struct prefix_rd vrf_prd;
667
668 /* import rt list for the vrf instance */
669 struct list *vrf_import_rtl;
670
671 /* export rt list for the vrf instance */
672 struct list *vrf_export_rtl;
673
674 /* list of corresponding l2vnis (struct bgpevpn) */
675 struct list *l2vnis;
676
677 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
678 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
679
680 struct vpn_policy vpn_policy[AFI_MAX];
681
682 struct bgp_pbr_config *bgp_pbr_cfg;
683
684 /* Count of peers in established state */
685 uint32_t established_peers;
686
687 /* Weighted ECMP related config. */
688 enum bgp_link_bw_handling lb_handling;
689
690 /* Process Queue for handling routes */
691 struct work_queue *process_queue;
692
693 /* BGP Conditional advertisement */
694 uint32_t condition_filter_count;
695 struct thread *t_condition_check;
696
697 QOBJ_FIELDS
698 };
699 DECLARE_QOBJ_TYPE(bgp)
700
701 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
702 DECLARE_HOOK(bgp_inst_config_write,
703 (struct bgp *bgp, struct vty *vty),
704 (bgp, vty))
705
706 /* Thread callback information */
707 struct afi_safi_info {
708 afi_t afi;
709 safi_t safi;
710 struct bgp *bgp;
711 };
712
713 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
714
715 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
716 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
717 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
718 && bgp->vrf_id != VRF_UNKNOWN))
719
720 #define BGP_SELECT_DEFER_DISABLE(bgp) \
721 (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
722
723 #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
724 (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
725 || bm->wait_for_fib)
726
727 /* BGP peer-group support. */
728 struct peer_group {
729 /* Name of the peer-group. */
730 char *name;
731
732 /* Pointer to BGP. */
733 struct bgp *bgp;
734
735 /* Peer-group client list. */
736 struct list *peer;
737
738 /** Dynamic neighbor listening ranges */
739 struct list *listen_range[AFI_MAX];
740
741 /* Peer-group config */
742 struct peer *conf;
743 };
744
745 /* BGP Notify message format. */
746 struct bgp_notify {
747 uint8_t code;
748 uint8_t subcode;
749 char *data;
750 bgp_size_t length;
751 uint8_t *raw_data;
752 };
753
754 /* Next hop self address. */
755 struct bgp_nexthop {
756 struct interface *ifp;
757 struct in_addr v4;
758 struct in6_addr v6_global;
759 struct in6_addr v6_local;
760 };
761
762 /* BGP addpath values */
763 #define BGP_ADDPATH_RX 1
764 #define BGP_ADDPATH_TX 2
765 #define BGP_ADDPATH_ID_LEN 4
766
767 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
768
769 /* Route map direction */
770 #define RMAP_IN 0
771 #define RMAP_OUT 1
772 #define RMAP_MAX 2
773
774 #define BGP_DEFAULT_TTL 1
775 #define BGP_GTSM_HOPS_DISABLED 0
776 #define BGP_GTSM_HOPS_CONNECTED 1
777
778 /* Advertise map */
779 #define CONDITION_NON_EXIST false
780 #define CONDITION_EXIST true
781
782 enum update_type { WITHDRAW, ADVERTISE };
783
784 #include "filter.h"
785
786 /* BGP filter structure. */
787 struct bgp_filter {
788 /* Distribute-list. */
789 struct {
790 char *name;
791 struct access_list *alist;
792 } dlist[FILTER_MAX];
793
794 /* Prefix-list. */
795 struct {
796 char *name;
797 struct prefix_list *plist;
798 } plist[FILTER_MAX];
799
800 /* Filter-list. */
801 struct {
802 char *name;
803 struct as_list *aslist;
804 } aslist[FILTER_MAX];
805
806 /* Route-map. */
807 struct {
808 char *name;
809 struct route_map *map;
810 } map[RMAP_MAX];
811
812 /* Unsuppress-map. */
813 struct {
814 char *name;
815 struct route_map *map;
816 } usmap;
817
818 /* Advertise-map */
819 struct {
820 char *aname;
821 struct route_map *amap;
822
823 bool condition;
824
825 char *cname;
826 struct route_map *cmap;
827
828 enum update_type update_type;
829 } advmap;
830 };
831
832 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
833 a peer who's AS is part of our Confederation. */
834 typedef enum {
835 BGP_PEER_UNSPECIFIED,
836 BGP_PEER_IBGP,
837 BGP_PEER_EBGP,
838 BGP_PEER_INTERNAL,
839 BGP_PEER_CONFED,
840 } bgp_peer_sort_t;
841
842 /* BGP message header and packet size. */
843 #define BGP_MARKER_SIZE 16
844 #define BGP_HEADER_SIZE 19
845 #define BGP_MAX_PACKET_SIZE 4096
846 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
847
848 /*
849 * Trigger delay for bgp_announce_route().
850 */
851 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
852 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
853
854 struct peer_af {
855 /* back pointer to the peer */
856 struct peer *peer;
857
858 /* which subgroup the peer_af belongs to */
859 struct update_subgroup *subgroup;
860
861 /* for being part of an update subgroup's peer list */
862 LIST_ENTRY(peer_af) subgrp_train;
863
864 /* for being part of a packet's peer list */
865 LIST_ENTRY(peer_af) pkt_train;
866
867 struct bpacket *next_pkt_to_send;
868
869 /*
870 * Trigger timer for bgp_announce_route().
871 */
872 struct thread *t_announce_route;
873
874 afi_t afi;
875 safi_t safi;
876 int afid;
877 };
878 /* BGP GR per peer ds */
879
880 #define BGP_PEER_GR_MODE 5
881 #define BGP_PEER_GR_EVENT_CMD 6
882
883 enum peer_mode {
884 PEER_HELPER = 0,
885 PEER_GR,
886 PEER_DISABLE,
887 PEER_INVALID,
888 PEER_GLOBAL_INHERIT /* This is the default mode */
889
890 };
891
892 enum peer_gr_command {
893 PEER_GR_CMD = 0,
894 NO_PEER_GR_CMD,
895 PEER_DISABLE_CMD,
896 NO_PEER_DISABLE_CMD,
897 PEER_HELPER_CMD,
898 NO_PEER_HELPER_CMD
899 };
900
901 typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
902
903 struct bgp_peer_gr {
904 enum peer_mode next_state;
905 bgp_peer_gr_action_ptr action_fun;
906 };
907
908 /* BGP finite state machine events. */
909 enum bgp_fsm_events {
910 BGP_Start = 1,
911 BGP_Stop,
912 TCP_connection_open,
913 TCP_connection_open_w_delay,
914 TCP_connection_closed,
915 TCP_connection_open_failed,
916 TCP_fatal_error,
917 ConnectRetry_timer_expired,
918 Hold_Timer_expired,
919 KeepAlive_timer_expired,
920 DelayOpen_timer_expired,
921 Receive_OPEN_message,
922 Receive_KEEPALIVE_message,
923 Receive_UPDATE_message,
924 Receive_NOTIFICATION_message,
925 Clearing_Completed,
926 BGP_EVENTS_MAX,
927 };
928
929 /* BGP finite state machine status. */
930 enum bgp_fsm_status {
931 Idle = 1,
932 Connect,
933 Active,
934 OpenSent,
935 OpenConfirm,
936 Established,
937 Clearing,
938 Deleted,
939 BGP_STATUS_MAX,
940 };
941
942 /* BGP neighbor structure. */
943 struct peer {
944 /* BGP structure. */
945 struct bgp *bgp;
946
947 /* reference count, primarily to allow bgp_process'ing of route_node's
948 * to be done after a struct peer is deleted.
949 *
950 * named 'lock' for hysterical reasons within Quagga.
951 */
952 int lock;
953
954 /* BGP peer group. */
955 struct peer_group *group;
956 uint64_t version[AFI_MAX][SAFI_MAX];
957
958 /* BGP peer_af structures, per configured AF on this peer */
959 struct peer_af *peer_af_array[BGP_AF_MAX];
960
961 /* Peer's remote AS number. */
962 int as_type;
963 as_t as;
964
965 /* Peer's local AS number. */
966 as_t local_as;
967
968 bgp_peer_sort_t sort;
969
970 /* Peer's Change local AS number. */
971 as_t change_local_as;
972
973 /* Remote router ID. */
974 struct in_addr remote_id;
975
976 /* Local router ID. */
977 struct in_addr local_id;
978
979 /* Packet receive and send buffer. */
980 pthread_mutex_t io_mtx; // guards ibuf, obuf
981 struct stream_fifo *ibuf; // packets waiting to be processed
982 struct stream_fifo *obuf; // packets waiting to be written
983
984 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
985 struct stream *obuf_work; // WiP buffer used to construct packets
986
987 struct stream *curr; // the current packet being parsed
988
989 /* We use a separate stream to encode MP_REACH_NLRI for efficient
990 * NLRI packing. peer->obuf_work stores all the other attributes. The
991 * actual packet is then constructed by concatenating the two.
992 */
993 struct stream *scratch;
994
995 /* the doppelganger peer structure, due to dual TCP conn setup */
996 struct peer *doppelganger;
997
998 /* Status of the peer. */
999 enum bgp_fsm_status status;
1000 enum bgp_fsm_status ostatus;
1001
1002 /* FSM events, stored for debug purposes.
1003 * Note: uchar used for reduced memory usage.
1004 */
1005 enum bgp_fsm_events cur_event;
1006 enum bgp_fsm_events last_event;
1007 enum bgp_fsm_events last_major_event;
1008
1009 /* Peer index, used for dumping TABLE_DUMP_V2 format */
1010 uint16_t table_dump_index;
1011
1012 /* Peer information */
1013 int fd; /* File descriptor */
1014 int ttl; /* TTL of TCP connection to the peer. */
1015 int rtt; /* Estimated round-trip-time from TCP_INFO */
1016 int rtt_expected; /* Expected round-trip-time for a peer */
1017 uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1018 uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1019 int gtsm_hops; /* minimum hopcount to peer */
1020 char *desc; /* Description of the peer. */
1021 unsigned short port; /* Destination port for peer */
1022 char *host; /* Printable address of the peer. */
1023 union sockunion su; /* Sockunion address of the peer. */
1024 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1025 time_t uptime; /* Last Up/Down time */
1026 time_t readtime; /* Last read time */
1027 time_t resettime; /* Last reset time */
1028
1029 char *conf_if; /* neighbor interface config name. */
1030 struct interface *ifp; /* corresponding interface */
1031 char *ifname; /* bind interface name. */
1032 char *update_if;
1033 union sockunion *update_source;
1034
1035 union sockunion *su_local; /* Sockunion of local address. */
1036 union sockunion *su_remote; /* Sockunion of remote address. */
1037 int shared_network; /* Is this peer shared same network. */
1038 struct bgp_nexthop nexthop; /* Nexthop */
1039
1040 /* Peer address family configuration. */
1041 uint8_t afc[AFI_MAX][SAFI_MAX];
1042 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1043 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1044 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1045
1046 /* Capability flags (reset in bgp_stop) */
1047 uint32_t cap;
1048 #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1049 #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1050 #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1051 #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1052 #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1053 #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1054 #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1055 #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1056 #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1057 #define PEER_CAP_RESTART_BIT_ADV (1U << 9) /* sent restart state */
1058 #define PEER_CAP_RESTART_BIT_RCV (1U << 10) /* peer restart state */
1059 #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1060 #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1061 #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1062 #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1063 #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1064 #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1065
1066 /* Capability flags (reset in bgp_stop) */
1067 uint32_t af_cap[AFI_MAX][SAFI_MAX];
1068 #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1069 #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1070 #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1071 #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1072 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1073 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1074 #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1075 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1076 #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1077 #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1078 #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1079 #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1080 #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1081 #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1082 #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1083
1084 /* Global configuration flags. */
1085 /*
1086 * Parallel array to flags that indicates whether each flag originates
1087 * from a peer-group or if it is config that is specific to this
1088 * individual peer. If a flag is set independent of the peer-group, the
1089 * same bit should be set here. If this peer is a peer-group, this
1090 * memory region should be all zeros.
1091 *
1092 * The assumption is that the default state for all flags is unset,
1093 * so if a flag is unset, the corresponding override flag is unset too.
1094 * However if a flag is set, the corresponding override flag is set.
1095 */
1096 uint32_t flags_override;
1097 /*
1098 * Parallel array to flags that indicates whether the default behavior
1099 * of *flags_override* should be inverted. If a flag is unset and the
1100 * corresponding invert flag is set, the corresponding override flag
1101 * would be set. However if a flag is set and the corresponding invert
1102 * flag is unset, the corresponding override flag would be unset.
1103 *
1104 * This can be used for attributes like *send-community*, which are
1105 * implicitely enabled and have to be disabled explicitely, compared to
1106 * 'normal' attributes like *next-hop-self* which are implicitely set.
1107 *
1108 * All operations dealing with flags should apply the following boolean
1109 * logic to keep the internal flag system in a sane state:
1110 *
1111 * value=0 invert=0 Inherit flag if member, otherwise unset flag
1112 * value=0 invert=1 Unset flag unconditionally
1113 * value=1 invert=0 Set flag unconditionally
1114 * value=1 invert=1 Inherit flag if member, otherwise set flag
1115 *
1116 * Contrary to the implementation of *flags_override*, the flag
1117 * inversion state can be set either on the peer OR the peer *and* the
1118 * peer-group. This was done on purpose, as the inversion state of a
1119 * flag can be determined on either the peer or the peer-group.
1120 *
1121 * Example: Enabling the cisco configuration mode inverts all flags
1122 * related to *send-community* unconditionally for both peer-groups and
1123 * peers.
1124 *
1125 * This behavior is different for interface peers though, which enable
1126 * the *extended-nexthop* flag by default, which regular peers do not.
1127 * As the peer-group can contain both regular and interface peers, the
1128 * flag inversion state must be set on the peer only.
1129 *
1130 * When a peer inherits the configuration from a peer-group and the
1131 * inversion state of the flag differs between peer and peer-group, the
1132 * newly set value must equal to the inverted state of the peer-group.
1133 */
1134 uint32_t flags_invert;
1135 /*
1136 * Effective array for storing the peer/peer-group flags. In case of a
1137 * peer-group, the peer-specific overrides (see flags_override and
1138 * flags_invert) must be respected.
1139 */
1140 uint32_t flags;
1141 #define PEER_FLAG_PASSIVE (1U << 0) /* passive mode */
1142 #define PEER_FLAG_SHUTDOWN (1U << 1) /* shutdown */
1143 #define PEER_FLAG_DONT_CAPABILITY (1U << 2) /* dont-capability */
1144 #define PEER_FLAG_OVERRIDE_CAPABILITY (1U << 3) /* override-capability */
1145 #define PEER_FLAG_STRICT_CAP_MATCH (1U << 4) /* strict-match */
1146 #define PEER_FLAG_DYNAMIC_CAPABILITY (1U << 5) /* dynamic capability */
1147 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1U << 6) /* disable-connected-check */
1148 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1U << 7) /* local-as no-prepend */
1149 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1U << 8) /* local-as no-prepend replace-as */
1150 #define PEER_FLAG_DELETE (1U << 9) /* mark the peer for deleting */
1151 #define PEER_FLAG_CONFIG_NODE (1U << 10) /* the node to update configs on */
1152 #define PEER_FLAG_LONESOUL (1U << 11)
1153 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1U << 12) /* dynamic neighbor */
1154 #define PEER_FLAG_CAPABILITY_ENHE (1U << 13) /* Extended next-hop (rfc 5549)*/
1155 #define PEER_FLAG_IFPEER_V6ONLY (1U << 14) /* if-based peer is v6 only */
1156 #define PEER_FLAG_IS_RFAPI_HD (1U << 15) /* attached to rfapi HD */
1157 #define PEER_FLAG_ENFORCE_FIRST_AS (1U << 16) /* enforce-first-as */
1158 #define PEER_FLAG_ROUTEADV (1U << 17) /* route advertise */
1159 #define PEER_FLAG_TIMER (1U << 18) /* keepalive & holdtime */
1160 #define PEER_FLAG_TIMER_CONNECT (1U << 19) /* connect timer */
1161 #define PEER_FLAG_PASSWORD (1U << 20) /* password */
1162 #define PEER_FLAG_LOCAL_AS (1U << 21) /* local-as */
1163 #define PEER_FLAG_UPDATE_SOURCE (1U << 22) /* update-source */
1164
1165 /* BGP-GR Peer related flags */
1166 #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1U << 23) /* Helper */
1167 #define PEER_FLAG_GRACEFUL_RESTART (1U << 24) /* Graceful Restart */
1168 #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1U << 25) /* Global-Inherit */
1169 #define PEER_FLAG_RTT_SHUTDOWN (1U << 26) /* shutdown rtt */
1170
1171 /*
1172 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1173 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1174 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1175 */
1176
1177 #define PEER_FLAG_TIMER_DELAYOPEN (1 << 27) /* delayopen timer */
1178
1179 struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1180 enum peer_mode peer_gr_present_state;
1181 /* Non stop forwarding afi-safi count for BGP gr feature*/
1182 uint8_t nsf_af_count;
1183
1184 uint8_t peer_gr_new_status_flag;
1185 #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1186 #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1187 #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1188
1189 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1190 char *tx_shutdown_message;
1191
1192 /* NSF mode (graceful restart) */
1193 uint8_t nsf[AFI_MAX][SAFI_MAX];
1194 /* EOR Send time */
1195 time_t eor_stime[AFI_MAX][SAFI_MAX];
1196 /* Last update packet sent time */
1197 time_t pkt_stime[AFI_MAX][SAFI_MAX];
1198
1199 /* Peer Per AF flags */
1200 /*
1201 * Please consult the comments for *flags_override*, *flags_invert* and
1202 * *flags* to understand what these three arrays do. The address-family
1203 * specific attributes are being treated the exact same way as global
1204 * peer attributes.
1205 */
1206 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
1207 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
1208 uint32_t af_flags[AFI_MAX][SAFI_MAX];
1209 #define PEER_FLAG_SEND_COMMUNITY (1U << 0) /* send-community */
1210 #define PEER_FLAG_SEND_EXT_COMMUNITY (1U << 1) /* send-community ext. */
1211 #define PEER_FLAG_NEXTHOP_SELF (1U << 2) /* next-hop-self */
1212 #define PEER_FLAG_REFLECTOR_CLIENT (1U << 3) /* reflector-client */
1213 #define PEER_FLAG_RSERVER_CLIENT (1U << 4) /* route-server-client */
1214 #define PEER_FLAG_SOFT_RECONFIG (1U << 5) /* soft-reconfiguration */
1215 #define PEER_FLAG_AS_PATH_UNCHANGED (1U << 6) /* transparent-as */
1216 #define PEER_FLAG_NEXTHOP_UNCHANGED (1U << 7) /* transparent-next-hop */
1217 #define PEER_FLAG_MED_UNCHANGED (1U << 8) /* transparent-next-hop */
1218 #define PEER_FLAG_DEFAULT_ORIGINATE (1U << 9) /* default-originate */
1219 #define PEER_FLAG_REMOVE_PRIVATE_AS (1U << 10) /* remove-private-as */
1220 #define PEER_FLAG_ALLOWAS_IN (1U << 11) /* set allowas-in */
1221 #define PEER_FLAG_ORF_PREFIX_SM (1U << 12) /* orf capability send-mode */
1222 #define PEER_FLAG_ORF_PREFIX_RM (1U << 13) /* orf capability receive-mode */
1223 #define PEER_FLAG_MAX_PREFIX (1U << 14) /* maximum prefix */
1224 #define PEER_FLAG_MAX_PREFIX_WARNING (1U << 15) /* maximum prefix warning-only */
1225 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1U << 16) /* leave link-local nexthop unchanged */
1226 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1U << 17) /* next-hop-self force */
1227 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1U << 18) /* remove-private-as all */
1228 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1U << 19) /* remove-private-as replace-as */
1229 #define PEER_FLAG_AS_OVERRIDE (1U << 20) /* as-override */
1230 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1U << 21) /* remove-private-as all replace-as */
1231 #define PEER_FLAG_WEIGHT (1U << 24) /* weight */
1232 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1U << 25) /* allowas-in origin */
1233 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1U << 26) /* Send large Communities */
1234 #define PEER_FLAG_MAX_PREFIX_OUT (1U << 27) /* outgoing maximum prefix */
1235 #define PEER_FLAG_MAX_PREFIX_FORCE (1U << 28) /* maximum-prefix <num> force */
1236
1237 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1238
1239 /* MD5 password */
1240 char *password;
1241
1242 /* default-originate route-map. */
1243 struct {
1244 char *name;
1245 struct route_map *map;
1246 } default_rmap[AFI_MAX][SAFI_MAX];
1247
1248 /* Peer status flags. */
1249 uint16_t sflags;
1250 #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1251 #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1252 #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1253 #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1254 #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1255 #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1256 #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1257
1258 /* Peer status af flags (reset in bgp_stop) */
1259 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1260 #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1261 #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1262 #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1263 #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1264 #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1265 #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1266
1267 /* Configured timer values. */
1268 _Atomic uint32_t holdtime;
1269 _Atomic uint32_t keepalive;
1270 _Atomic uint32_t connect;
1271 _Atomic uint32_t routeadv;
1272 _Atomic uint32_t delayopen;
1273
1274 /* Timer values. */
1275 _Atomic uint32_t v_start;
1276 _Atomic uint32_t v_connect;
1277 _Atomic uint32_t v_holdtime;
1278 _Atomic uint32_t v_keepalive;
1279 _Atomic uint32_t v_routeadv;
1280 _Atomic uint32_t v_delayopen;
1281 _Atomic uint32_t v_pmax_restart;
1282 _Atomic uint32_t v_gr_restart;
1283
1284 /* Threads. */
1285 struct thread *t_read;
1286 struct thread *t_write;
1287 struct thread *t_start;
1288 struct thread *t_connect_check_r;
1289 struct thread *t_connect_check_w;
1290 struct thread *t_connect;
1291 struct thread *t_holdtime;
1292 struct thread *t_routeadv;
1293 struct thread *t_delayopen;
1294 struct thread *t_pmax_restart;
1295 struct thread *t_gr_restart;
1296 struct thread *t_gr_stale;
1297 struct thread *t_generate_updgrp_packets;
1298 struct thread *t_process_packet;
1299
1300 /* Thread flags. */
1301 _Atomic uint32_t thread_flags;
1302 #define PEER_THREAD_WRITES_ON (1U << 0)
1303 #define PEER_THREAD_READS_ON (1U << 1)
1304 #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1305 #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1306
1307 /* workqueues */
1308 struct work_queue *clear_node_queue;
1309
1310 #define PEER_TOTAL_RX(peer) \
1311 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1312 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1313 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1314 + atomic_load_explicit(&peer->refresh_in, \
1315 memory_order_relaxed) \
1316 + atomic_load_explicit(&peer->keepalive_in, \
1317 memory_order_relaxed) \
1318 + atomic_load_explicit(&peer->dynamic_cap_in, \
1319 memory_order_relaxed)
1320
1321 #define PEER_TOTAL_TX(peer) \
1322 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1323 + atomic_load_explicit(&peer->update_out, \
1324 memory_order_relaxed) \
1325 + atomic_load_explicit(&peer->notify_out, \
1326 memory_order_relaxed) \
1327 + atomic_load_explicit(&peer->refresh_out, \
1328 memory_order_relaxed) \
1329 + atomic_load_explicit(&peer->keepalive_out, \
1330 memory_order_relaxed) \
1331 + atomic_load_explicit(&peer->dynamic_cap_out, \
1332 memory_order_relaxed)
1333
1334 /* Statistics field */
1335 _Atomic uint32_t open_in; /* Open message input count */
1336 _Atomic uint32_t open_out; /* Open message output count */
1337 _Atomic uint32_t update_in; /* Update message input count */
1338 _Atomic uint32_t update_out; /* Update message ouput count */
1339 _Atomic time_t update_time; /* Update message received time. */
1340 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1341 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1342 _Atomic uint32_t notify_in; /* Notify input count */
1343 _Atomic uint32_t notify_out; /* Notify output count */
1344 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1345 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1346 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1347 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1348
1349 uint32_t stat_pfx_filter;
1350 uint32_t stat_pfx_aspath_loop;
1351 uint32_t stat_pfx_originator_loop;
1352 uint32_t stat_pfx_cluster_loop;
1353 uint32_t stat_pfx_nh_invalid;
1354 uint32_t stat_pfx_dup_withdraw;
1355 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1356
1357 /* BGP state count */
1358 uint32_t established; /* Established */
1359 uint32_t dropped; /* Dropped */
1360
1361 /* Update delay related fields */
1362 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1363 for EOR */
1364
1365 /* Syncronization list and time. */
1366 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1367 time_t synctime;
1368 /* timestamp when the last UPDATE msg was written */
1369 _Atomic time_t last_write;
1370 /* timestamp when the last msg was written */
1371 _Atomic time_t last_update;
1372
1373 /* Notify data. */
1374 struct bgp_notify notify;
1375
1376 /* Filter structure. */
1377 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1378
1379 /*
1380 * Parallel array to filter that indicates whether each filter
1381 * originates from a peer-group or if it is config that is specific to
1382 * this individual peer. If a filter is set independent of the
1383 * peer-group the appropriate bit should be set here. If this peer is a
1384 * peer-group, this memory region should be all zeros. The assumption
1385 * is that the default state for all flags is unset. Due to filters
1386 * having a direction (e.g. in/out/...), this array has a third
1387 * dimension for storing the overrides independently per direction.
1388 *
1389 * Notes:
1390 * - if a filter for an individual peer is unset, the corresponding
1391 * override flag is unset and the peer is considered to be back in
1392 * sync with the peer-group.
1393 * - This does *not* contain the filter values, rather it contains
1394 * whether the filter in filter (struct bgp_filter) is peer-specific.
1395 */
1396 uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1397 #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1398 #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1399 #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1400 #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1401 #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1402 #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1403
1404 /* ORF Prefix-list */
1405 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1406
1407 /* Text description of last attribute rcvd */
1408 char rcvd_attr_str[BUFSIZ];
1409
1410 /* Track if we printed the attribute in debugs */
1411 int rcvd_attr_printed;
1412
1413 /* Accepted prefix count */
1414 uint32_t pcount[AFI_MAX][SAFI_MAX];
1415
1416 /* Max prefix count. */
1417 uint32_t pmax[AFI_MAX][SAFI_MAX];
1418 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1419 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1420 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1421
1422 /* Send prefix count. */
1423 uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1424
1425 /* allowas-in. */
1426 char allowas_in[AFI_MAX][SAFI_MAX];
1427
1428 /* weight */
1429 unsigned long weight[AFI_MAX][SAFI_MAX];
1430
1431 /* peer reset cause */
1432 uint8_t last_reset;
1433 #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1434 #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1435 #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1436 #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1437 #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1438 #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1439 #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1440 #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1441 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1442 #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1443 #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1444 #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1445 #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1446 #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1447 #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1448 #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1449 #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1450 #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1451 #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1452 #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1453 #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1454 #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1455 #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1456 #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1457 #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1458 #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1459 #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1460 #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1461 #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1462 #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1463 #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1464 #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1465 #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1466 /*
1467 * Remember to update peer_down_str in bgp_fsm.c when you add
1468 * a new value to the last_reset reason
1469 */
1470
1471 size_t last_reset_cause_size;
1472 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1473
1474 /* The kind of route-map Flags.*/
1475 uint16_t rmap_type;
1476 #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1477 #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1478 #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1479 #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1480 #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1481 #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1482 #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1483 #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1484 #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1485
1486 /* peer specific BFD information */
1487 struct bfd_info *bfd_info;
1488
1489 /* hostname and domainname advertised by host */
1490 char *hostname;
1491 char *domainname;
1492
1493 /* Sender side AS path loop detection. */
1494 bool as_path_loop_detection;
1495
1496 /* Conditional advertisement */
1497 bool advmap_config_change[AFI_MAX][SAFI_MAX];
1498 bool advmap_table_change;
1499
1500 QOBJ_FIELDS
1501 };
1502 DECLARE_QOBJ_TYPE(peer)
1503
1504 /* Inherit peer attribute from peer-group. */
1505 #define PEER_ATTR_INHERIT(peer, group, attr) \
1506 ((peer)->attr = (group)->conf->attr)
1507 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1508 do { \
1509 XFREE(mt, (peer)->attr); \
1510 if ((group)->conf->attr) \
1511 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1512 else \
1513 (peer)->attr = NULL; \
1514 } while (0)
1515 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1516 do { \
1517 if ((peer)->attr) \
1518 sockunion_free((peer)->attr); \
1519 if ((group)->conf->attr) \
1520 (peer)->attr = sockunion_dup((group)->conf->attr); \
1521 else \
1522 (peer)->attr = NULL; \
1523 } while (0)
1524
1525 /* Check if suppress start/restart of sessions to peer. */
1526 #define BGP_PEER_START_SUPPRESSED(P) \
1527 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1528 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) \
1529 || CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN))
1530
1531 #define PEER_ROUTE_ADV_DELAY(peer) \
1532 (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1533
1534 #define PEER_PASSWORD_MINLEN (1)
1535 #define PEER_PASSWORD_MAXLEN (80)
1536
1537 /* This structure's member directly points incoming packet data
1538 stream. */
1539 struct bgp_nlri {
1540 /* AFI. */
1541 uint16_t afi; /* iana_afi_t */
1542
1543 /* SAFI. */
1544 uint8_t safi; /* iana_safi_t */
1545
1546 /* Pointer to NLRI byte stream. */
1547 uint8_t *nlri;
1548
1549 /* Length of whole NLRI. */
1550 bgp_size_t length;
1551 };
1552
1553 /* BGP versions. */
1554 #define BGP_VERSION_4 4
1555
1556 /* Default BGP port number. */
1557 #define BGP_PORT_DEFAULT 179
1558
1559 /* BGP minimum message size. */
1560 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1561 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1562 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1563 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1564 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1565 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1566
1567 /* BGP message types. */
1568 #define BGP_MSG_OPEN 1
1569 #define BGP_MSG_UPDATE 2
1570 #define BGP_MSG_NOTIFY 3
1571 #define BGP_MSG_KEEPALIVE 4
1572 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1573 #define BGP_MSG_CAPABILITY 6
1574 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1575
1576 /* BGP open optional parameter. */
1577 #define BGP_OPEN_OPT_AUTH 1
1578 #define BGP_OPEN_OPT_CAP 2
1579
1580 /* BGP4 attribute type codes. */
1581 #define BGP_ATTR_ORIGIN 1
1582 #define BGP_ATTR_AS_PATH 2
1583 #define BGP_ATTR_NEXT_HOP 3
1584 #define BGP_ATTR_MULTI_EXIT_DISC 4
1585 #define BGP_ATTR_LOCAL_PREF 5
1586 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1587 #define BGP_ATTR_AGGREGATOR 7
1588 #define BGP_ATTR_COMMUNITIES 8
1589 #define BGP_ATTR_ORIGINATOR_ID 9
1590 #define BGP_ATTR_CLUSTER_LIST 10
1591 #define BGP_ATTR_DPA 11
1592 #define BGP_ATTR_ADVERTISER 12
1593 #define BGP_ATTR_RCID_PATH 13
1594 #define BGP_ATTR_MP_REACH_NLRI 14
1595 #define BGP_ATTR_MP_UNREACH_NLRI 15
1596 #define BGP_ATTR_EXT_COMMUNITIES 16
1597 #define BGP_ATTR_AS4_PATH 17
1598 #define BGP_ATTR_AS4_AGGREGATOR 18
1599 #define BGP_ATTR_AS_PATHLIMIT 21
1600 #define BGP_ATTR_PMSI_TUNNEL 22
1601 #define BGP_ATTR_ENCAP 23
1602 #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1603 #define BGP_ATTR_LARGE_COMMUNITIES 32
1604 #define BGP_ATTR_PREFIX_SID 40
1605 #define BGP_ATTR_SRTE_COLOR 51
1606 #ifdef ENABLE_BGP_VNC_ATTR
1607 #define BGP_ATTR_VNC 255
1608 #endif
1609
1610 /* BGP update origin. */
1611 #define BGP_ORIGIN_IGP 0
1612 #define BGP_ORIGIN_EGP 1
1613 #define BGP_ORIGIN_INCOMPLETE 2
1614 #define BGP_ORIGIN_UNSPECIFIED 255
1615
1616 /* BGP notify message codes. */
1617 #define BGP_NOTIFY_HEADER_ERR 1
1618 #define BGP_NOTIFY_OPEN_ERR 2
1619 #define BGP_NOTIFY_UPDATE_ERR 3
1620 #define BGP_NOTIFY_HOLD_ERR 4
1621 #define BGP_NOTIFY_FSM_ERR 5
1622 #define BGP_NOTIFY_CEASE 6
1623 #define BGP_NOTIFY_CAPABILITY_ERR 7
1624
1625 /* Subcodes for BGP Finite State Machine Error */
1626 #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1627 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1628 #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1629 #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1630
1631 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1632
1633 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1634 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1635 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1636 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1637
1638 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1639 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1640 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1641 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1642 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1643 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1644 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1645 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1646 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1647
1648 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1649 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1650 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1651 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1652 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1653 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1654 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1655 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1656 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1657 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1658 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1659 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1660
1661 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1662 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1663 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1664 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1665 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1666 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1667 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1668 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1669 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1670
1671 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1672 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1673 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1674 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1675
1676 /* BGP timers default value. */
1677 #define BGP_INIT_START_TIMER 1
1678 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1679 * version-/profile-specific values. The values here do not matter, they only
1680 * exist to provide a clear layering separation between core and CLI.
1681 */
1682 #define BGP_DEFAULT_HOLDTIME 180
1683 #define BGP_DEFAULT_KEEPALIVE 60
1684 #define BGP_DEFAULT_CONNECT_RETRY 120
1685
1686 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1687 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1688
1689 /* BGP RFC 4271 DelayOpenTime default value */
1690 #define BGP_DEFAULT_DELAYOPEN 120
1691
1692 /* BGP default local preference. */
1693 #define BGP_DEFAULT_LOCAL_PREF 100
1694
1695 /* BGP local-preference to send when 'bgp graceful-shutdown'
1696 * is configured */
1697 #define BGP_GSHUT_LOCAL_PREF 0
1698
1699 /* BGP default subgroup packet queue max . */
1700 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1701
1702 /* BGP graceful restart */
1703 #define BGP_DEFAULT_RESTART_TIME 120
1704 #define BGP_DEFAULT_STALEPATH_TIME 360
1705 #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1706 #define BGP_DEFAULT_RIB_STALE_TIME 500
1707 #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
1708
1709 /* BGP uptime string length. */
1710 #define BGP_UPTIME_LEN 25
1711
1712 /* Default configuration settings for bgpd. */
1713 #define BGP_VTY_PORT 2605
1714 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1715
1716 /* BGP Dynamic Neighbors feature */
1717 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1718 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1719 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1720
1721 /* Flag for peer_clear_soft(). */
1722 enum bgp_clear_type {
1723 BGP_CLEAR_SOFT_NONE,
1724 BGP_CLEAR_SOFT_OUT,
1725 BGP_CLEAR_SOFT_IN,
1726 BGP_CLEAR_SOFT_BOTH,
1727 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1728 };
1729
1730 /* Macros. */
1731 #define BGP_INPUT(P) ((P)->curr)
1732 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1733 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1734 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1735
1736 /* BGP error codes. */
1737 #define BGP_SUCCESS 0
1738 #define BGP_CREATED 1
1739 #define BGP_ERR_INVALID_VALUE -1
1740 #define BGP_ERR_INVALID_FLAG -2
1741 #define BGP_ERR_INVALID_AS -3
1742 #define BGP_ERR_INVALID_BGP -4
1743 #define BGP_ERR_PEER_GROUP_MEMBER -5
1744 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1745 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1746 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1747 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1748 #define BGP_ERR_AS_MISMATCH -12
1749 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1750 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1751 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1752 #define BGP_ERR_NOT_INTERNAL_PEER -16
1753 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1754 #define BGP_ERR_AF_UNCONFIGURED -18
1755 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1756 #define BGP_ERR_INSTANCE_MISMATCH -20
1757 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1758 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1759 #define BGP_ERR_TCPSIG_FAILED -23
1760 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1761 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1762 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1763 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1764 #define BGP_ERR_AS_OVERRIDE -28
1765 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1766 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1767 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1768 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1769 #define BGP_ERR_MAX -33
1770 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1771 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1772
1773 /* BGP GR ERRORS */
1774 #define BGP_ERR_GR_INVALID_CMD -36
1775 #define BGP_ERR_GR_OPERATION_FAILED -37
1776 #define BGP_GR_NO_OPERATION -38
1777
1778 /*
1779 * Enumeration of different policy kinds a peer can be configured with.
1780 */
1781 typedef enum {
1782 BGP_POLICY_ROUTE_MAP,
1783 BGP_POLICY_FILTER_LIST,
1784 BGP_POLICY_PREFIX_LIST,
1785 BGP_POLICY_DISTRIBUTE_LIST,
1786 } bgp_policy_type_e;
1787
1788 /* peer_flag_change_type. */
1789 enum peer_change_type {
1790 peer_change_none,
1791 peer_change_reset,
1792 peer_change_reset_in,
1793 peer_change_reset_out,
1794 };
1795
1796 extern struct bgp_master *bm;
1797 extern unsigned int multipath_num;
1798
1799 /* Prototypes. */
1800 extern void bgp_terminate(void);
1801 extern void bgp_reset(void);
1802 extern time_t bgp_clock(void);
1803 extern void bgp_zclient_reset(void);
1804 extern struct bgp *bgp_get_default(void);
1805 extern struct bgp *bgp_lookup(as_t, const char *);
1806 extern struct bgp *bgp_lookup_by_name(const char *);
1807 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1808 extern struct bgp *bgp_get_evpn(void);
1809 extern void bgp_set_evpn(struct bgp *bgp);
1810 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1811 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1812 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1813 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1814 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1815 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1816 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1817 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1818 union sockunion *,
1819 struct peer_group *);
1820 extern struct prefix *
1821 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1822 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1823 struct prefix *,
1824 struct prefix **);
1825 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1826 union sockunion *);
1827
1828 /*
1829 * Peers are incredibly easy to memory leak
1830 * due to the various ways that they are actually used
1831 * Provide some functionality to debug locks and unlocks
1832 */
1833 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1834 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1835 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1836 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1837
1838 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1839 extern bgp_peer_sort_t peer_sort_lookup(struct peer *peer);
1840
1841 extern bool peer_active(struct peer *);
1842 extern bool peer_active_nego(struct peer *);
1843 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1844 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1845 as_t, as_t, int, afi_t, safi_t,
1846 struct peer_group *);
1847 extern struct peer *peer_create_accept(struct bgp *);
1848 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1849 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1850 json_object *json);
1851
1852 extern int bgp_config_write(struct vty *);
1853
1854 extern void bgp_master_init(struct thread_master *master,
1855 const int buffer_size);
1856
1857 extern void bgp_init(unsigned short instance);
1858 extern void bgp_pthreads_run(void);
1859 extern void bgp_pthreads_finish(void);
1860 extern void bgp_route_map_init(void);
1861 extern void bgp_session_reset(struct peer *);
1862
1863 extern int bgp_option_set(int);
1864 extern int bgp_option_unset(int);
1865 extern int bgp_option_check(int);
1866
1867 /* set the bgp no-rib option during runtime and remove installed routes */
1868 extern void bgp_option_norib_set_runtime(void);
1869
1870 /* unset the bgp no-rib option during runtime and reset all peers */
1871 extern void bgp_option_norib_unset_runtime(void);
1872
1873 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1874 extern void bgp_instance_up(struct bgp *);
1875 extern void bgp_instance_down(struct bgp *);
1876 extern int bgp_delete(struct bgp *);
1877
1878 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1879 vrf_id_t old_vrf_id, bool create);
1880
1881 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1882 extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
1883
1884 extern void bm_wait_for_fib_set(bool set);
1885 extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
1886 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1887 extern int bgp_cluster_id_unset(struct bgp *);
1888
1889 extern void bgp_confederation_id_set(struct bgp *, as_t);
1890 extern int bgp_confederation_id_unset(struct bgp *);
1891 extern bool bgp_confederation_peers_check(struct bgp *, as_t);
1892
1893 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1894 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1895
1896 extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
1897 uint32_t connect_retry, uint32_t delayopen);
1898 extern void bgp_timers_unset(struct bgp *);
1899
1900 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1901 extern int bgp_default_local_preference_unset(struct bgp *);
1902
1903 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1904 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1905
1906 extern int bgp_listen_limit_set(struct bgp *, int);
1907 extern int bgp_listen_limit_unset(struct bgp *);
1908
1909 extern bool bgp_update_delay_active(struct bgp *);
1910 extern bool bgp_update_delay_configured(struct bgp *);
1911 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1912 extern void peer_as_change(struct peer *, as_t, int);
1913 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1914 int, afi_t, safi_t);
1915 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1916 extern int peer_delete(struct peer *peer);
1917 extern void peer_notify_unconfig(struct peer *peer);
1918 extern int peer_group_delete(struct peer_group *);
1919 extern int peer_group_remote_as_delete(struct peer_group *);
1920 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1921 extern void peer_group_notify_unconfig(struct peer_group *group);
1922
1923 extern int peer_activate(struct peer *, afi_t, safi_t);
1924 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1925
1926 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1927 struct peer_group *, as_t *);
1928
1929 extern int peer_flag_set(struct peer *, uint32_t);
1930 extern int peer_flag_unset(struct peer *, uint32_t);
1931 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1932
1933 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1934 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1935 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1936 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1937 uint32_t flag);
1938 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1939 enum peer_change_type type);
1940
1941 extern int peer_ebgp_multihop_set(struct peer *, int);
1942 extern int peer_ebgp_multihop_unset(struct peer *);
1943 extern int is_ebgp_multihop_configured(struct peer *peer);
1944
1945 extern void peer_description_set(struct peer *, const char *);
1946 extern void peer_description_unset(struct peer *);
1947
1948 extern int peer_update_source_if_set(struct peer *, const char *);
1949 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1950 extern int peer_update_source_unset(struct peer *);
1951
1952 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1953 const char *rmap,
1954 struct route_map *route_map);
1955 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1956
1957 extern void peer_port_set(struct peer *, uint16_t);
1958 extern void peer_port_unset(struct peer *);
1959
1960 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1961 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1962
1963 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1964 uint32_t holdtime);
1965 extern int peer_timers_unset(struct peer *);
1966
1967 extern int peer_timers_connect_set(struct peer *, uint32_t);
1968 extern int peer_timers_connect_unset(struct peer *);
1969
1970 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1971 extern int peer_advertise_interval_unset(struct peer *);
1972
1973 extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
1974 extern int peer_timers_delayopen_unset(struct peer *peer);
1975
1976 extern void peer_interface_set(struct peer *, const char *);
1977 extern void peer_interface_unset(struct peer *);
1978
1979 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1980 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1981
1982 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1983 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1984
1985 extern int peer_local_as_set(struct peer *, as_t, bool no_prepend,
1986 bool replace_as);
1987 extern int peer_local_as_unset(struct peer *);
1988
1989 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1990 const char *);
1991 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1992
1993 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1994 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1995
1996 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1997 const char *name, struct route_map *route_map);
1998 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1999
2000 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2001 const char *name,
2002 struct route_map *route_map);
2003
2004 extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
2005 const char *advertise_name,
2006 struct route_map *advertise_map,
2007 const char *condition_name,
2008 struct route_map *condition_map,
2009 bool condition);
2010
2011 extern int peer_password_set(struct peer *, const char *);
2012 extern int peer_password_unset(struct peer *);
2013
2014 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2015
2016 extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2017 const char *advertise_name,
2018 struct route_map *advertise_map,
2019 const char *condition_name,
2020 struct route_map *condition_map,
2021 bool condition);
2022
2023 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2024 uint8_t, int, uint16_t, bool force);
2025 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2026
2027 extern int peer_clear(struct peer *, struct listnode **);
2028 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2029
2030 extern int peer_ttl_security_hops_set(struct peer *, int);
2031 extern int peer_ttl_security_hops_unset(struct peer *);
2032
2033 extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2034 extern void peer_tx_shutdown_message_unset(struct peer *);
2035
2036 extern int bgp_route_map_update_timer(struct thread *thread);
2037 extern void bgp_route_map_terminate(void);
2038
2039 extern int peer_cmp(struct peer *p1, struct peer *p2);
2040
2041 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2042 afi_t *afi, safi_t *safi);
2043 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2044 iana_afi_t *pkt_afi,
2045 iana_safi_t *pkt_safi);
2046
2047 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2048 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2049 extern int peer_af_delete(struct peer *, afi_t, safi_t);
2050
2051 extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2052 extern void bgp_shutdown_disable(struct bgp *bgp);
2053
2054 extern void bgp_close(void);
2055 extern void bgp_free(struct bgp *);
2056 void bgp_gr_apply_running_config(void);
2057
2058 /* BGP GR */
2059 int bgp_global_gr_init(struct bgp *bgp);
2060 int bgp_peer_gr_init(struct peer *peer);
2061
2062
2063 #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2064 do { \
2065 struct peer *peer_loop; \
2066 bool gr_router_detected = false; \
2067 struct listnode *node = {0}; \
2068 for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2069 if (CHECK_FLAG(peer_loop->flags, \
2070 PEER_FLAG_GRACEFUL_RESTART)) \
2071 gr_router_detected = true; \
2072 } \
2073 if (gr_router_detected \
2074 && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2075 bgp_zebra_send_capabilities(_bgp, false); \
2076 } else if (!gr_router_detected \
2077 && _bgp->present_zebra_gr_state \
2078 == ZEBRA_GR_ENABLE) { \
2079 bgp_zebra_send_capabilities(_bgp, true); \
2080 } \
2081 } while (0)
2082
2083 static inline struct bgp *bgp_lock(struct bgp *bgp)
2084 {
2085 bgp->lock++;
2086 return bgp;
2087 }
2088
2089 static inline void bgp_unlock(struct bgp *bgp)
2090 {
2091 assert(bgp->lock > 0);
2092 if (--bgp->lock == 0)
2093 bgp_free(bgp);
2094 }
2095
2096 static inline int afindex(afi_t afi, safi_t safi)
2097 {
2098 switch (afi) {
2099 case AFI_IP:
2100 switch (safi) {
2101 case SAFI_UNICAST:
2102 return BGP_AF_IPV4_UNICAST;
2103 case SAFI_MULTICAST:
2104 return BGP_AF_IPV4_MULTICAST;
2105 case SAFI_LABELED_UNICAST:
2106 return BGP_AF_IPV4_LBL_UNICAST;
2107 case SAFI_MPLS_VPN:
2108 return BGP_AF_IPV4_VPN;
2109 case SAFI_ENCAP:
2110 return BGP_AF_IPV4_ENCAP;
2111 case SAFI_FLOWSPEC:
2112 return BGP_AF_IPV4_FLOWSPEC;
2113 default:
2114 return BGP_AF_MAX;
2115 }
2116 break;
2117 case AFI_IP6:
2118 switch (safi) {
2119 case SAFI_UNICAST:
2120 return BGP_AF_IPV6_UNICAST;
2121 case SAFI_MULTICAST:
2122 return BGP_AF_IPV6_MULTICAST;
2123 case SAFI_LABELED_UNICAST:
2124 return BGP_AF_IPV6_LBL_UNICAST;
2125 case SAFI_MPLS_VPN:
2126 return BGP_AF_IPV6_VPN;
2127 case SAFI_ENCAP:
2128 return BGP_AF_IPV6_ENCAP;
2129 case SAFI_FLOWSPEC:
2130 return BGP_AF_IPV6_FLOWSPEC;
2131 default:
2132 return BGP_AF_MAX;
2133 }
2134 break;
2135 case AFI_L2VPN:
2136 switch (safi) {
2137 case SAFI_EVPN:
2138 return BGP_AF_L2VPN_EVPN;
2139 default:
2140 return BGP_AF_MAX;
2141 }
2142 default:
2143 return BGP_AF_MAX;
2144 }
2145 }
2146
2147 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2148 static inline int peer_group_active(struct peer *peer)
2149 {
2150 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2151 return 1;
2152 return 0;
2153 }
2154
2155 /* If peer is negotiated at least one address family return 1. */
2156 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2157 {
2158 if (peer->afc_nego[afi][SAFI_UNICAST]
2159 || peer->afc_nego[afi][SAFI_MULTICAST]
2160 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2161 || peer->afc_nego[afi][SAFI_MPLS_VPN]
2162 || peer->afc_nego[afi][SAFI_ENCAP]
2163 || peer->afc_nego[afi][SAFI_FLOWSPEC]
2164 || peer->afc_nego[afi][SAFI_EVPN])
2165 return 1;
2166 return 0;
2167 }
2168
2169 /* If at least one address family activated for group, return 1. */
2170 static inline int peer_group_af_configured(struct peer_group *group)
2171 {
2172 struct peer *peer = group->conf;
2173
2174 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2175 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2176 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2177 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2178 || peer->afc[AFI_IP6][SAFI_UNICAST]
2179 || peer->afc[AFI_IP6][SAFI_MULTICAST]
2180 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2181 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2182 || peer->afc[AFI_IP6][SAFI_ENCAP]
2183 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2184 || peer->afc[AFI_L2VPN][SAFI_EVPN])
2185 return 1;
2186 return 0;
2187 }
2188
2189 static inline char *timestamp_string(time_t ts)
2190 {
2191 time_t tbuf;
2192 tbuf = time(NULL) - (bgp_clock() - ts);
2193 return ctime(&tbuf);
2194 }
2195
2196 static inline int peer_established(struct peer *peer)
2197 {
2198 if (peer->status == Established)
2199 return 1;
2200 return 0;
2201 }
2202
2203 static inline int peer_dynamic_neighbor(struct peer *peer)
2204 {
2205 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
2206 }
2207
2208 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2209 {
2210 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2211 }
2212
2213 /* Lookup VRF for BGP instance based on its type. */
2214 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2215 {
2216 struct vrf *vrf;
2217
2218 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2219 vrf = vrf_lookup_by_id(VRF_DEFAULT);
2220 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2221 vrf = vrf_lookup_by_name(bgp->name);
2222 else
2223 vrf = NULL;
2224
2225 return vrf;
2226 }
2227
2228 /* Link BGP instance to VRF. */
2229 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2230 {
2231 bgp->vrf_id = vrf->vrf_id;
2232 if (vrf->info != (void *)bgp)
2233 vrf->info = (void *)bgp_lock(bgp);
2234 }
2235
2236 /* Unlink BGP instance from VRF. */
2237 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2238 {
2239 if (vrf->info == (void *)bgp) {
2240 vrf->info = NULL;
2241 bgp_unlock(bgp);
2242 }
2243 bgp->vrf_id = VRF_UNKNOWN;
2244 }
2245
2246 static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2247 {
2248 /* True if either set for this instance or globally */
2249 return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2250 !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2251 }
2252
2253 extern void bgp_unset_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
2254
2255 /* For benefit of rfapi */
2256 extern struct peer *peer_new(struct bgp *bgp);
2257
2258 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2259 const char *ip_str, bool use_json);
2260 extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2261 const char *name,
2262 enum bgp_instance_type inst_type);
2263
2264 /* Hooks */
2265 DECLARE_HOOK(peer_status_changed, (struct peer * peer), (peer))
2266 void peer_nsf_stop(struct peer *peer);
2267
2268 #endif /* _QUAGGA_BGPD_H */
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