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