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