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Merge pull request #2197 from qlyoung/docuser-debianpkg
[mirror_frr.git] / bgpd / bgpd.h
1 /* BGP message definition header.
2 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef _QUAGGA_BGPD_H
22 #define _QUAGGA_BGPD_H
23
24 #include "qobj.h"
25 #include <pthread.h>
26
27 #include "lib/json.h"
28 #include "vrf.h"
29 #include "vty.h"
30
31 /* For union sockunion. */
32 #include "queue.h"
33 #include "sockunion.h"
34 #include "routemap.h"
35 #include "linklist.h"
36 #include "defaults.h"
37 #include "bgp_memory.h"
38 #include "bitfield.h"
39 #include "vxlan.h"
40 #include "bgp_labelpool.h"
41
42 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
43 #define BGP_PEER_MAX_HASH_SIZE 16384
44
45 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
46 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
47
48 struct update_subgroup;
49 struct bpacket;
50
51 /*
52 * Allow the neighbor XXXX remote-as to take internal or external
53 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
54 * behavior
55 * in the system.
56 */
57 enum { AS_UNSPECIFIED = 0,
58 AS_SPECIFIED,
59 AS_INTERNAL,
60 AS_EXTERNAL,
61 };
62
63 /* Typedef BGP specific types. */
64 typedef uint32_t as_t;
65 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
66 typedef uint16_t bgp_size_t;
67
68 #define max(a, b) \
69 ({ \
70 __typeof__(a) _a = (a); \
71 __typeof__(b) _b = (b); \
72 _a > _b ? _a : _b; \
73 })
74
75 enum bgp_af_index {
76 BGP_AF_START,
77 BGP_AF_IPV4_UNICAST = BGP_AF_START,
78 BGP_AF_IPV4_MULTICAST,
79 BGP_AF_IPV4_VPN,
80 BGP_AF_IPV6_UNICAST,
81 BGP_AF_IPV6_MULTICAST,
82 BGP_AF_IPV6_VPN,
83 BGP_AF_IPV4_ENCAP,
84 BGP_AF_IPV6_ENCAP,
85 BGP_AF_L2VPN_EVPN,
86 BGP_AF_IPV4_LBL_UNICAST,
87 BGP_AF_IPV6_LBL_UNICAST,
88 BGP_AF_IPV4_FLOWSPEC,
89 BGP_AF_IPV6_FLOWSPEC,
90 BGP_AF_MAX
91 };
92
93 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
94
95 #define FOREACH_AFI_SAFI(afi, safi) \
96 for (afi = AFI_IP; afi < AFI_MAX; afi++) \
97 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
98
99 /* BGP master for system wide configurations and variables. */
100 struct bgp_master {
101 /* BGP instance list. */
102 struct list *bgp;
103
104 /* BGP thread master. */
105 struct thread_master *master;
106
107 /* BGP pthreads. */
108 #define PTHREAD_IO (1 << 1)
109 #define PTHREAD_KEEPALIVES (1 << 2)
110
111 /* work queues */
112 struct work_queue *process_main_queue;
113
114 /* Listening sockets */
115 struct list *listen_sockets;
116
117 /* BGP port number. */
118 uint16_t port;
119
120 /* Listener address */
121 char *address;
122
123 /* BGP start time. */
124 time_t start_time;
125
126 /* Various BGP global configuration. */
127 uint8_t options;
128 #define BGP_OPT_NO_FIB (1 << 0)
129 #define BGP_OPT_MULTIPLE_INSTANCE (1 << 1)
130 #define BGP_OPT_CONFIG_CISCO (1 << 2)
131 #define BGP_OPT_NO_LISTEN (1 << 3)
132
133 uint64_t updgrp_idspace;
134 uint64_t subgrp_idspace;
135
136 /* timer to dampen route map changes */
137 struct thread *t_rmap_update; /* Handle route map updates */
138 uint32_t rmap_update_timer; /* Route map update timer */
139 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
140
141 /* Id space for automatic RD derivation for an EVI/VRF */
142 bitfield_t rd_idspace;
143
144 /* dynamic mpls label allocation pool */
145 struct labelpool labelpool;
146
147 bool terminating; /* global flag that sigint terminate seen */
148 QOBJ_FIELDS
149 };
150 DECLARE_QOBJ_TYPE(bgp_master)
151
152 /* BGP route-map structure. */
153 struct bgp_rmap {
154 char *name;
155 struct route_map *map;
156 };
157
158 struct bgp_redist {
159 unsigned short instance;
160
161 /* BGP redistribute metric configuration. */
162 uint8_t redist_metric_flag;
163 uint32_t redist_metric;
164
165 /* BGP redistribute route-map. */
166 struct bgp_rmap rmap;
167 };
168
169 typedef enum {
170 BGP_VPN_POLICY_DIR_FROMVPN = 0,
171 BGP_VPN_POLICY_DIR_TOVPN = 1,
172 BGP_VPN_POLICY_DIR_MAX = 2
173 } vpn_policy_direction_t;
174
175 struct vpn_policy {
176 struct bgp *bgp; /* parent */
177 afi_t afi;
178 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
179 struct ecommunity *import_redirect_rtlist;
180 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
181 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
182
183 /* should be mpls_label_t? */
184 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
185 uint32_t tovpn_zebra_vrf_label_last_sent;
186 struct prefix_rd tovpn_rd;
187 struct prefix tovpn_nexthop; /* unset => set to 0 */
188 uint32_t flags;
189 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
190 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
191 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
192
193 /*
194 * If we are importing another vrf into us keep a list of
195 * vrf names that are being imported into us.
196 */
197 struct list *import_vrf;
198
199 /*
200 * if we are being exported to another vrf keep a list of
201 * vrf names that we are being exported to.
202 */
203 struct list *export_vrf;
204 };
205
206 /*
207 * Type of 'struct bgp'.
208 * - Default: The default instance
209 * - VRF: A specific (non-default) VRF
210 * - View: An instance used for route exchange
211 * The "default" instance is treated separately to simplify the code. Note
212 * that if deployed in a Multi-VRF environment, it may not exist.
213 */
214 enum bgp_instance_type {
215 BGP_INSTANCE_TYPE_DEFAULT,
216 BGP_INSTANCE_TYPE_VRF,
217 BGP_INSTANCE_TYPE_VIEW
218 };
219
220 /* BGP instance structure. */
221 struct bgp {
222 /* AS number of this BGP instance. */
223 as_t as;
224
225 /* Name of this BGP instance. */
226 char *name;
227 char *name_pretty; /* printable "VRF|VIEW name|default" */
228
229 /* Type of instance and VRF id. */
230 enum bgp_instance_type inst_type;
231 vrf_id_t vrf_id;
232
233 /* Reference count to allow peer_delete to finish after bgp_delete */
234 int lock;
235
236 /* Self peer. */
237 struct peer *peer_self;
238
239 /* BGP peer. */
240 struct list *peer;
241 struct hash *peerhash;
242
243 /* BGP peer group. */
244 struct list *group;
245
246 /* The maximum number of BGP dynamic neighbors that can be created */
247 int dynamic_neighbors_limit;
248
249 /* The current number of BGP dynamic neighbors */
250 int dynamic_neighbors_count;
251
252 struct hash *update_groups[BGP_AF_MAX];
253
254 /*
255 * Global statistics for update groups.
256 */
257 struct {
258 uint32_t join_events;
259 uint32_t prune_events;
260 uint32_t merge_events;
261 uint32_t split_events;
262 uint32_t updgrp_switch_events;
263 uint32_t peer_refreshes_combined;
264 uint32_t adj_count;
265 uint32_t merge_checks_triggered;
266
267 uint32_t updgrps_created;
268 uint32_t updgrps_deleted;
269 uint32_t subgrps_created;
270 uint32_t subgrps_deleted;
271 } update_group_stats;
272
273 /* BGP configuration. */
274 uint16_t config;
275 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
276 #define BGP_CONFIG_CONFEDERATION (1 << 1)
277
278 /* BGP router identifier. */
279 struct in_addr router_id;
280 struct in_addr router_id_static;
281 struct in_addr router_id_zebra;
282
283 /* BGP route reflector cluster ID. */
284 struct in_addr cluster_id;
285
286 /* BGP confederation information. */
287 as_t confed_id;
288 as_t *confed_peers;
289 int confed_peers_cnt;
290
291 struct thread
292 *t_startup; /* start-up timer on only once at the beginning */
293
294 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
295 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
296 uint32_t maxmed_onstartup_value; /* Max-med value when active on
297 start-up */
298 struct thread
299 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
300 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
301
302 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
303 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
304 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
305 */
306 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
307
308 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
309 uint32_t maxmed_value; /* Max-med value when its active */
310
311 /* BGP update delay on startup */
312 struct thread *t_update_delay;
313 struct thread *t_establish_wait;
314 uint8_t update_delay_over;
315 uint8_t main_zebra_update_hold;
316 uint8_t main_peers_update_hold;
317 uint16_t v_update_delay;
318 uint16_t v_establish_wait;
319 char update_delay_begin_time[64];
320 char update_delay_end_time[64];
321 char update_delay_zebra_resume_time[64];
322 char update_delay_peers_resume_time[64];
323 uint32_t established;
324 uint32_t restarted_peers;
325 uint32_t implicit_eors;
326 uint32_t explicit_eors;
327 #define BGP_UPDATE_DELAY_DEF 0
328 #define BGP_UPDATE_DELAY_MIN 0
329 #define BGP_UPDATE_DELAY_MAX 3600
330
331 /* BGP flags. */
332 uint32_t flags;
333 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
334 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
335 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
336 #define BGP_FLAG_MED_CONFED (1 << 3)
337 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
338 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
339 #define BGP_FLAG_ENFORCE_FIRST_AS (1 << 6)
340 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
341 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
342 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
343 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
344 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
345 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
346 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
347 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
348 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
349 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
350 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
351 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
352 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
353 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
354 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
355
356 /* BGP Per AF flags */
357 uint16_t af_flags[AFI_MAX][SAFI_MAX];
358 #define BGP_CONFIG_DAMPENING (1 << 0)
359 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
360 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
361 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
362 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
363 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
364 /* import/export between address families */
365 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
366 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
367 /* vrf-route leaking flags */
368 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
369 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
370 #define BGP_DEFAULT_NAME "default"
371
372 /* Route table for next-hop lookup cache. */
373 struct bgp_table *nexthop_cache_table[AFI_MAX];
374
375 /* Route table for import-check */
376 struct bgp_table *import_check_table[AFI_MAX];
377
378 struct bgp_table *connected_table[AFI_MAX];
379
380 struct hash *address_hash;
381
382 /* DB for all local tunnel-ips - used mainly for martian checks
383 Currently it only has all VxLan tunnel IPs*/
384 struct hash *tip_hash;
385
386 /* Static route configuration. */
387 struct bgp_table *route[AFI_MAX][SAFI_MAX];
388
389 /* Aggregate address configuration. */
390 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
391
392 /* BGP routing information base. */
393 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
394
395 /* BGP table route-map. */
396 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
397
398 /* BGP redistribute configuration. */
399 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
400
401 /* Allocate MPLS labels */
402 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
403
404 /* Allocate hash entries to store policy routing information
405 * The hash are used to host pbr rules somewhere.
406 * Actually, pbr will only be used by flowspec
407 * those hash elements will have relationship together as
408 * illustrated in below diagram:
409 *
410 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
411 * <----- pbr_match j <--- pbr_match_entry 1..m
412 *
413 * - here in BGP structure, the list of match and actions will
414 * stand for the list of ipset sets, and table_ids in the kernel
415 * - the arrow above between pbr_match and pbr_action indicate
416 * that a backpointer permits match to find the action
417 * - the arrow betwen match_entry and match is a hash list
418 * contained in match, that lists the whole set of entries
419 */
420 struct hash *pbr_match_hash;
421 struct hash *pbr_action_hash;
422
423 /* timer to re-evaluate neighbor default-originate route-maps */
424 struct thread *t_rmap_def_originate_eval;
425 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
426
427 /* BGP distance configuration. */
428 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
429 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
430 uint8_t distance_local[AFI_MAX][SAFI_MAX];
431
432 /* BGP default local-preference. */
433 uint32_t default_local_pref;
434
435 /* BGP default subgroup pkt queue max */
436 uint32_t default_subgroup_pkt_queue_max;
437
438 /* BGP default timer. */
439 uint32_t default_holdtime;
440 uint32_t default_keepalive;
441
442 /* BGP graceful restart */
443 uint32_t restart_time;
444 uint32_t stalepath_time;
445
446 /* Maximum-paths configuration */
447 struct bgp_maxpaths_cfg {
448 uint16_t maxpaths_ebgp;
449 uint16_t maxpaths_ibgp;
450 uint16_t ibgp_flags;
451 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
452 } maxpaths[AFI_MAX][SAFI_MAX];
453
454 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
455 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
456
457 /* Automatic coalesce adjust on/off */
458 bool heuristic_coalesce;
459 /* Actual coalesce time */
460 uint32_t coalesce_time;
461
462 /* Auto-shutdown new peers */
463 bool autoshutdown;
464
465 uint32_t addpath_tx_id;
466 int addpath_tx_used[AFI_MAX][SAFI_MAX];
467
468 #if ENABLE_BGP_VNC
469 struct rfapi_cfg *rfapi_cfg;
470 struct rfapi *rfapi;
471 #endif
472
473 /* EVPN related information */
474
475 /* EVI hash table */
476 struct hash *vnihash;
477
478 /* EVPN enable - advertise gateway macip routes */
479 int advertise_gw_macip;
480
481 /* EVPN enable - advertise local VNIs and their MACs etc. */
482 int advertise_all_vni;
483
484 /* Hash table of Import RTs to EVIs */
485 struct hash *import_rt_hash;
486
487 /* Hash table of VRF import RTs to VRFs */
488 struct hash *vrf_import_rt_hash;
489
490 /* L3-VNI corresponding to this vrf */
491 vni_t l3vni;
492
493 /* router-mac to be used in mac-ip routes for this vrf */
494 struct ethaddr rmac;
495
496 /* originator ip - to be used as NH for type-5 routes */
497 struct in_addr originator_ip;
498
499 /* vrf flags */
500 uint32_t vrf_flags;
501 #define BGP_VRF_AUTO (1 << 0)
502 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
503 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
504 #define BGP_VRF_RD_CFGD (1 << 3)
505 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
506
507
508 /* unique ID for auto derivation of RD for this vrf */
509 uint16_t vrf_rd_id;
510
511 /* Automatically derived RD for this VRF */
512 struct prefix_rd vrf_prd_auto;
513
514 /* RD for this VRF */
515 struct prefix_rd vrf_prd;
516
517 /* import rt list for the vrf instance */
518 struct list *vrf_import_rtl;
519
520 /* export rt list for the vrf instance */
521 struct list *vrf_export_rtl;
522
523 /* list of corresponding l2vnis (struct bgpevpn) */
524 struct list *l2vnis;
525
526 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
527 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
528
529 struct vpn_policy vpn_policy[AFI_MAX];
530
531 QOBJ_FIELDS
532 };
533 DECLARE_QOBJ_TYPE(bgp)
534
535 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
536
537 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
538 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
539 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
540 && bgp->vrf_id != VRF_UNKNOWN))
541
542 /* BGP peer-group support. */
543 struct peer_group {
544 /* Name of the peer-group. */
545 char *name;
546
547 /* Pointer to BGP. */
548 struct bgp *bgp;
549
550 /* Peer-group client list. */
551 struct list *peer;
552
553 /** Dynamic neighbor listening ranges */
554 struct list *listen_range[AFI_MAX];
555
556 /* Peer-group config */
557 struct peer *conf;
558 };
559
560 /* BGP Notify message format. */
561 struct bgp_notify {
562 uint8_t code;
563 uint8_t subcode;
564 char *data;
565 bgp_size_t length;
566 uint8_t *raw_data;
567 };
568
569 /* Next hop self address. */
570 struct bgp_nexthop {
571 struct interface *ifp;
572 struct in_addr v4;
573 struct in6_addr v6_global;
574 struct in6_addr v6_local;
575 };
576
577 /* BGP addpath values */
578 #define BGP_ADDPATH_RX 1
579 #define BGP_ADDPATH_TX 2
580 #define BGP_ADDPATH_ID_LEN 4
581
582 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
583
584 /* BGP router distinguisher value. */
585 #define BGP_RD_SIZE 8
586
587 struct bgp_rd {
588 uint8_t val[BGP_RD_SIZE];
589 };
590
591 #define RMAP_IN 0
592 #define RMAP_OUT 1
593 #define RMAP_MAX 2
594
595 #include "filter.h"
596
597 /* BGP filter structure. */
598 struct bgp_filter {
599 /* Distribute-list. */
600 struct {
601 char *name;
602 struct access_list *alist;
603 } dlist[FILTER_MAX];
604
605 /* Prefix-list. */
606 struct {
607 char *name;
608 struct prefix_list *plist;
609 } plist[FILTER_MAX];
610
611 /* Filter-list. */
612 struct {
613 char *name;
614 struct as_list *aslist;
615 } aslist[FILTER_MAX];
616
617 /* Route-map. */
618 struct {
619 char *name;
620 struct route_map *map;
621 } map[RMAP_MAX];
622
623 /* Unsuppress-map. */
624 struct {
625 char *name;
626 struct route_map *map;
627 } usmap;
628 };
629
630 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
631 a peer who's AS is part of our Confederation. */
632 typedef enum {
633 BGP_PEER_IBGP = 1,
634 BGP_PEER_EBGP,
635 BGP_PEER_INTERNAL,
636 BGP_PEER_CONFED,
637 } bgp_peer_sort_t;
638
639 /* BGP message header and packet size. */
640 #define BGP_MARKER_SIZE 16
641 #define BGP_HEADER_SIZE 19
642 #define BGP_MAX_PACKET_SIZE 4096
643 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
644
645 /*
646 * Trigger delay for bgp_announce_route().
647 */
648 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
649 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
650
651 struct peer_af {
652 /* back pointer to the peer */
653 struct peer *peer;
654
655 /* which subgroup the peer_af belongs to */
656 struct update_subgroup *subgroup;
657
658 /* for being part of an update subgroup's peer list */
659 LIST_ENTRY(peer_af) subgrp_train;
660
661 /* for being part of a packet's peer list */
662 LIST_ENTRY(peer_af) pkt_train;
663
664 struct bpacket *next_pkt_to_send;
665
666 /*
667 * Trigger timer for bgp_announce_route().
668 */
669 struct thread *t_announce_route;
670
671 afi_t afi;
672 safi_t safi;
673 int afid;
674 };
675
676 /* BGP neighbor structure. */
677 struct peer {
678 /* BGP structure. */
679 struct bgp *bgp;
680
681 /* reference count, primarily to allow bgp_process'ing of route_node's
682 * to be done after a struct peer is deleted.
683 *
684 * named 'lock' for hysterical reasons within Quagga.
685 */
686 int lock;
687
688 /* BGP peer group. */
689 struct peer_group *group;
690 uint64_t version[AFI_MAX][SAFI_MAX];
691
692 /* BGP peer_af structures, per configured AF on this peer */
693 struct peer_af *peer_af_array[BGP_AF_MAX];
694
695 /* Peer's remote AS number. */
696 int as_type;
697 as_t as;
698
699 /* Peer's local AS number. */
700 as_t local_as;
701
702 bgp_peer_sort_t sort;
703
704 /* Peer's Change local AS number. */
705 as_t change_local_as;
706
707 /* Remote router ID. */
708 struct in_addr remote_id;
709
710 /* Local router ID. */
711 struct in_addr local_id;
712
713 /* Packet receive and send buffer. */
714 pthread_mutex_t io_mtx; // guards ibuf, obuf
715 struct stream_fifo *ibuf; // packets waiting to be processed
716 struct stream_fifo *obuf; // packets waiting to be written
717
718 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
719 struct stream *obuf_work; // WiP buffer used to construct packets
720
721 struct stream *curr; // the current packet being parsed
722
723 /* We use a separate stream to encode MP_REACH_NLRI for efficient
724 * NLRI packing. peer->obuf_work stores all the other attributes. The
725 * actual packet is then constructed by concatenating the two.
726 */
727 struct stream *scratch;
728
729 /* the doppelganger peer structure, due to dual TCP conn setup */
730 struct peer *doppelganger;
731
732 /* Status of the peer. */
733 int status;
734 int ostatus;
735
736 /* FSM events, stored for debug purposes.
737 * Note: uchar used for reduced memory usage.
738 */
739 unsigned char cur_event;
740 unsigned char last_event;
741 unsigned char last_major_event;
742
743 /* Peer index, used for dumping TABLE_DUMP_V2 format */
744 uint16_t table_dump_index;
745
746 /* Peer information */
747 int fd; /* File descriptor */
748 int ttl; /* TTL of TCP connection to the peer. */
749 int rtt; /* Estimated round-trip-time from TCP_INFO */
750 int gtsm_hops; /* minimum hopcount to peer */
751 char *desc; /* Description of the peer. */
752 unsigned short port; /* Destination port for peer */
753 char *host; /* Printable address of the peer. */
754 union sockunion su; /* Sockunion address of the peer. */
755 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
756 time_t uptime; /* Last Up/Down time */
757 time_t readtime; /* Last read time */
758 time_t resettime; /* Last reset time */
759
760 char *conf_if; /* neighbor interface config name. */
761 struct interface *ifp; /* corresponding interface */
762 char *ifname; /* bind interface name. */
763 char *update_if;
764 union sockunion *update_source;
765
766 union sockunion *su_local; /* Sockunion of local address. */
767 union sockunion *su_remote; /* Sockunion of remote address. */
768 int shared_network; /* Is this peer shared same network. */
769 struct bgp_nexthop nexthop; /* Nexthop */
770
771 /* Peer address family configuration. */
772 uint8_t afc[AFI_MAX][SAFI_MAX];
773 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
774 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
775 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
776
777 /* Capability flags (reset in bgp_stop) */
778 uint32_t cap;
779 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
780 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
781 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
782 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
783 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
784 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
785 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
786 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
787 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
788 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
789 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
790 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
791 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
792 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
793 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
794 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
795 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
796
797 /* Capability flags (reset in bgp_stop) */
798 uint32_t af_cap[AFI_MAX][SAFI_MAX];
799 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
800 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
801 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
802 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
803 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
804 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
805 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
806 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
807 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
808 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
809 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
810 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
811 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
812 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
813 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
814
815 /* Global configuration flags. */
816 uint32_t flags;
817 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
818 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
819 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
820 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
821 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
822 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
823 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
824 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
825 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
826 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
827 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
828 #define PEER_FLAG_LONESOUL (1 << 11)
829 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
830 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
831 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
832 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
833
834 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
835 char *tx_shutdown_message;
836
837 /* NSF mode (graceful restart) */
838 uint8_t nsf[AFI_MAX][SAFI_MAX];
839
840 /* Peer Per AF flags */
841 /*
842 * Parallel array to af_flags that indicates whether each flag
843 * originates from a peer-group or if it is config that is specific to
844 * this individual peer. If a flag is set independent of the
845 * peer-group the same bit should be set here. If this peer is a
846 * peer-group, this memory region should be all zeros. The assumption
847 * is that the default state for all flags is unset.
848 *
849 * Notes:
850 * - if a flag for an individual peer is unset, the corresponding
851 * override flag is unset and the peer is considered to be back in
852 * sync with the peer-group.
853 * - This does *not* contain the flag values, rather it contains
854 * whether the flag at the same position in af_flags is
855 * *peer-specific*.
856 */
857 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
858 /*
859 * Effective flags, computed by applying peer-group flags and then
860 * overriding with individual flags
861 */
862 uint32_t af_flags[AFI_MAX][SAFI_MAX];
863 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
864 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
865 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
866 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
867 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
868 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
869 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
870 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
871 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
872 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
873 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
874 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
875 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
876 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
877 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
878 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
879 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
880 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
881 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
882 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
883 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
884 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
885 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS (1 << 22) /* addpath-tx-all-paths */
886 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
887 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
888 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
889 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
890
891 /* MD5 password */
892 char *password;
893
894 /* default-originate route-map. */
895 struct {
896 char *name;
897 struct route_map *map;
898 } default_rmap[AFI_MAX][SAFI_MAX];
899
900 /* Peer status flags. */
901 uint16_t sflags;
902 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
903 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
904 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
905 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
906 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
907 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
908 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
909
910 /* Peer status af flags (reset in bgp_stop) */
911 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
912 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
913 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
914 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
915 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
916 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
917 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
918
919 /* Default attribute value for the peer. */
920 uint32_t config;
921 #define PEER_CONFIG_TIMER (1 << 0) /* keepalive & holdtime */
922 #define PEER_CONFIG_CONNECT (1 << 1) /* connect */
923 #define PEER_CONFIG_ROUTEADV (1 << 2) /* route advertise */
924 #define PEER_GROUP_CONFIG_TIMER (1 << 3) /* timers from peer-group */
925
926 #define PEER_OR_GROUP_TIMER_SET(peer) \
927 (CHECK_FLAG(peer->config, PEER_CONFIG_TIMER) \
928 || CHECK_FLAG(peer->config, PEER_GROUP_CONFIG_TIMER))
929
930 _Atomic uint32_t holdtime;
931 _Atomic uint32_t keepalive;
932 _Atomic uint32_t connect;
933 _Atomic uint32_t routeadv;
934
935 /* Timer values. */
936 _Atomic uint32_t v_start;
937 _Atomic uint32_t v_connect;
938 _Atomic uint32_t v_holdtime;
939 _Atomic uint32_t v_keepalive;
940 _Atomic uint32_t v_routeadv;
941 _Atomic uint32_t v_pmax_restart;
942 _Atomic uint32_t v_gr_restart;
943
944 /* Threads. */
945 struct thread *t_read;
946 struct thread *t_write;
947 struct thread *t_start;
948 struct thread *t_connect_check_r;
949 struct thread *t_connect_check_w;
950 struct thread *t_connect;
951 struct thread *t_holdtime;
952 struct thread *t_routeadv;
953 struct thread *t_pmax_restart;
954 struct thread *t_gr_restart;
955 struct thread *t_gr_stale;
956 struct thread *t_generate_updgrp_packets;
957 struct thread *t_process_packet;
958
959 /* Thread flags. */
960 _Atomic uint16_t thread_flags;
961 #define PEER_THREAD_WRITES_ON (1 << 0)
962 #define PEER_THREAD_READS_ON (1 << 1)
963 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
964 /* workqueues */
965 struct work_queue *clear_node_queue;
966
967 #define PEER_TOTAL_RX(peer) \
968 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
969 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
970 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
971 + atomic_load_explicit(&peer->refresh_in, \
972 memory_order_relaxed) \
973 + atomic_load_explicit(&peer->keepalive_in, \
974 memory_order_relaxed) \
975 + atomic_load_explicit(&peer->dynamic_cap_in, \
976 memory_order_relaxed)
977
978 #define PEER_TOTAL_TX(peer) \
979 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
980 + atomic_load_explicit(&peer->update_out, \
981 memory_order_relaxed) \
982 + atomic_load_explicit(&peer->notify_out, \
983 memory_order_relaxed) \
984 + atomic_load_explicit(&peer->refresh_out, \
985 memory_order_relaxed) \
986 + atomic_load_explicit(&peer->keepalive_out, \
987 memory_order_relaxed) \
988 + atomic_load_explicit(&peer->dynamic_cap_out, \
989 memory_order_relaxed)
990
991 /* Statistics field */
992 _Atomic uint32_t open_in; /* Open message input count */
993 _Atomic uint32_t open_out; /* Open message output count */
994 _Atomic uint32_t update_in; /* Update message input count */
995 _Atomic uint32_t update_out; /* Update message ouput count */
996 _Atomic time_t update_time; /* Update message received time. */
997 _Atomic uint32_t keepalive_in; /* Keepalive input count */
998 _Atomic uint32_t keepalive_out; /* Keepalive output count */
999 _Atomic uint32_t notify_in; /* Notify input count */
1000 _Atomic uint32_t notify_out; /* Notify output count */
1001 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1002 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1003 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1004 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1005
1006 /* BGP state count */
1007 uint32_t established; /* Established */
1008 uint32_t dropped; /* Dropped */
1009
1010 /* Update delay related fields */
1011 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1012 for EOR */
1013
1014 /* Syncronization list and time. */
1015 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1016 time_t synctime;
1017 /* timestamp when the last UPDATE msg was written */
1018 _Atomic time_t last_write;
1019 /* timestamp when the last msg was written */
1020 _Atomic time_t last_update;
1021
1022 /* Send prefix count. */
1023 unsigned long scount[AFI_MAX][SAFI_MAX];
1024
1025 /* Notify data. */
1026 struct bgp_notify notify;
1027
1028 /* Filter structure. */
1029 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1030
1031 /* ORF Prefix-list */
1032 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1033
1034 /* Text description of last attribute rcvd */
1035 char rcvd_attr_str[BUFSIZ];
1036
1037 /* Track if we printed the attribute in debugs */
1038 int rcvd_attr_printed;
1039
1040 /* Prefix count. */
1041 unsigned long pcount[AFI_MAX][SAFI_MAX];
1042
1043 /* Max prefix count. */
1044 unsigned long pmax[AFI_MAX][SAFI_MAX];
1045 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1046 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1047 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1048
1049 /* allowas-in. */
1050 char allowas_in[AFI_MAX][SAFI_MAX];
1051
1052 /* weight */
1053 unsigned long weight[AFI_MAX][SAFI_MAX];
1054
1055 /* peer reset cause */
1056 char last_reset;
1057 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1058 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1059 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1060 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1061 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1062 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1063 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1064 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1065 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1066 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1067 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1068 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1069 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1070 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1071 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1072 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1073 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1074 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1075 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1076 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1077 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1078 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1079 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1080 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1081 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1082 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1083 unsigned long last_reset_cause_size;
1084 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1085
1086 /* The kind of route-map Flags.*/
1087 uint8_t rmap_type;
1088 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1089 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1090 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1091 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1092 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1093 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1094 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1095 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1096
1097 /* peer specific BFD information */
1098 struct bfd_info *bfd_info;
1099
1100 /* hostname and domainname advertised by host */
1101 char *hostname;
1102 char *domainname;
1103
1104 QOBJ_FIELDS
1105 };
1106 DECLARE_QOBJ_TYPE(peer)
1107
1108 /* Check if suppress start/restart of sessions to peer. */
1109 #define BGP_PEER_START_SUPPRESSED(P) \
1110 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1111 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1112
1113 #define PEER_PASSWORD_MINLEN (1)
1114 #define PEER_PASSWORD_MAXLEN (80)
1115
1116 /* This structure's member directly points incoming packet data
1117 stream. */
1118 struct bgp_nlri {
1119 /* AFI. */
1120 uint16_t afi; /* iana_afi_t */
1121
1122 /* SAFI. */
1123 uint8_t safi; /* iana_safi_t */
1124
1125 /* Pointer to NLRI byte stream. */
1126 uint8_t *nlri;
1127
1128 /* Length of whole NLRI. */
1129 bgp_size_t length;
1130 };
1131
1132 /* BGP versions. */
1133 #define BGP_VERSION_4 4
1134
1135 /* Default BGP port number. */
1136 #define BGP_PORT_DEFAULT 179
1137
1138 /* BGP minimum message size. */
1139 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1140 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1141 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1142 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1143 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1144 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1145
1146 /* BGP message types. */
1147 #define BGP_MSG_OPEN 1
1148 #define BGP_MSG_UPDATE 2
1149 #define BGP_MSG_NOTIFY 3
1150 #define BGP_MSG_KEEPALIVE 4
1151 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1152 #define BGP_MSG_CAPABILITY 6
1153 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1154
1155 /* BGP open optional parameter. */
1156 #define BGP_OPEN_OPT_AUTH 1
1157 #define BGP_OPEN_OPT_CAP 2
1158
1159 /* BGP4 attribute type codes. */
1160 #define BGP_ATTR_ORIGIN 1
1161 #define BGP_ATTR_AS_PATH 2
1162 #define BGP_ATTR_NEXT_HOP 3
1163 #define BGP_ATTR_MULTI_EXIT_DISC 4
1164 #define BGP_ATTR_LOCAL_PREF 5
1165 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1166 #define BGP_ATTR_AGGREGATOR 7
1167 #define BGP_ATTR_COMMUNITIES 8
1168 #define BGP_ATTR_ORIGINATOR_ID 9
1169 #define BGP_ATTR_CLUSTER_LIST 10
1170 #define BGP_ATTR_DPA 11
1171 #define BGP_ATTR_ADVERTISER 12
1172 #define BGP_ATTR_RCID_PATH 13
1173 #define BGP_ATTR_MP_REACH_NLRI 14
1174 #define BGP_ATTR_MP_UNREACH_NLRI 15
1175 #define BGP_ATTR_EXT_COMMUNITIES 16
1176 #define BGP_ATTR_AS4_PATH 17
1177 #define BGP_ATTR_AS4_AGGREGATOR 18
1178 #define BGP_ATTR_AS_PATHLIMIT 21
1179 #define BGP_ATTR_PMSI_TUNNEL 22
1180 #define BGP_ATTR_ENCAP 23
1181 #define BGP_ATTR_LARGE_COMMUNITIES 32
1182 #define BGP_ATTR_PREFIX_SID 40
1183 #if ENABLE_BGP_VNC
1184 #define BGP_ATTR_VNC 255
1185 #endif
1186
1187 /* BGP update origin. */
1188 #define BGP_ORIGIN_IGP 0
1189 #define BGP_ORIGIN_EGP 1
1190 #define BGP_ORIGIN_INCOMPLETE 2
1191
1192 /* BGP notify message codes. */
1193 #define BGP_NOTIFY_HEADER_ERR 1
1194 #define BGP_NOTIFY_OPEN_ERR 2
1195 #define BGP_NOTIFY_UPDATE_ERR 3
1196 #define BGP_NOTIFY_HOLD_ERR 4
1197 #define BGP_NOTIFY_FSM_ERR 5
1198 #define BGP_NOTIFY_CEASE 6
1199 #define BGP_NOTIFY_CAPABILITY_ERR 7
1200
1201 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1202
1203 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1204 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1205 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1206 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1207
1208 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1209 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1210 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1211 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1212 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1213 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1214 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1215 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1216 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1217
1218 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1219 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1220 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1221 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1222 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1223 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1224 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1225 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1226 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1227 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1228 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1229 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1230
1231 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1232 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1233 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1234 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1235 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1236 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1237 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1238 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1239 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1240
1241 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1242 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1243 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1244 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1245
1246 /* BGP finite state machine status. */
1247 #define Idle 1
1248 #define Connect 2
1249 #define Active 3
1250 #define OpenSent 4
1251 #define OpenConfirm 5
1252 #define Established 6
1253 #define Clearing 7
1254 #define Deleted 8
1255 #define BGP_STATUS_MAX 9
1256
1257 /* BGP finite state machine events. */
1258 #define BGP_Start 1
1259 #define BGP_Stop 2
1260 #define TCP_connection_open 3
1261 #define TCP_connection_closed 4
1262 #define TCP_connection_open_failed 5
1263 #define TCP_fatal_error 6
1264 #define ConnectRetry_timer_expired 7
1265 #define Hold_Timer_expired 8
1266 #define KeepAlive_timer_expired 9
1267 #define Receive_OPEN_message 10
1268 #define Receive_KEEPALIVE_message 11
1269 #define Receive_UPDATE_message 12
1270 #define Receive_NOTIFICATION_message 13
1271 #define Clearing_Completed 14
1272 #define BGP_EVENTS_MAX 15
1273
1274 /* BGP timers default value. */
1275 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1276 #define BGP_INIT_START_TIMER 1
1277 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1278 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1279 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1280 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1281 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1282
1283 /* BGP default local preference. */
1284 #define BGP_DEFAULT_LOCAL_PREF 100
1285
1286 /* BGP local-preference to send when 'bgp graceful-shutdown'
1287 * is configured */
1288 #define BGP_GSHUT_LOCAL_PREF 0
1289
1290 /* BGP default subgroup packet queue max . */
1291 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1292
1293 /* BGP graceful restart */
1294 #define BGP_DEFAULT_RESTART_TIME 120
1295 #define BGP_DEFAULT_STALEPATH_TIME 360
1296
1297 /* BGP uptime string length. */
1298 #define BGP_UPTIME_LEN 25
1299
1300 /* Default configuration settings for bgpd. */
1301 #define BGP_VTY_PORT 2605
1302 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1303
1304 /* Check AS path loop when we send NLRI. */
1305 /* #define BGP_SEND_ASPATH_CHECK */
1306
1307 /* BGP Dynamic Neighbors feature */
1308 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1309 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1310 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1311
1312 /* Flag for peer_clear_soft(). */
1313 enum bgp_clear_type {
1314 BGP_CLEAR_SOFT_NONE,
1315 BGP_CLEAR_SOFT_OUT,
1316 BGP_CLEAR_SOFT_IN,
1317 BGP_CLEAR_SOFT_BOTH,
1318 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1319 };
1320
1321 /* Macros. */
1322 #define BGP_INPUT(P) ((P)->curr)
1323 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1324 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1325 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1326
1327 /* BGP error codes. */
1328 #define BGP_SUCCESS 0
1329 #define BGP_ERR_INVALID_VALUE -1
1330 #define BGP_ERR_INVALID_FLAG -2
1331 #define BGP_ERR_INVALID_AS -3
1332 #define BGP_ERR_INVALID_BGP -4
1333 #define BGP_ERR_PEER_GROUP_MEMBER -5
1334 #define BGP_ERR_MULTIPLE_INSTANCE_USED -6
1335 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1336 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1337 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1338 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1339 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET -11
1340 #define BGP_ERR_AS_MISMATCH -12
1341 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1342 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1343 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1344 #define BGP_ERR_NOT_INTERNAL_PEER -16
1345 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1346 #define BGP_ERR_AF_UNCONFIGURED -18
1347 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1348 #define BGP_ERR_INSTANCE_MISMATCH -20
1349 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1350 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1351 #define BGP_ERR_TCPSIG_FAILED -23
1352 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1353 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1354 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1355 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1356 #define BGP_ERR_AS_OVERRIDE -28
1357 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1358 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1359 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1360 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1361 #define BGP_ERR_MAX -33
1362 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1363 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1364
1365 /*
1366 * Enumeration of different policy kinds a peer can be configured with.
1367 */
1368 typedef enum {
1369 BGP_POLICY_ROUTE_MAP,
1370 BGP_POLICY_FILTER_LIST,
1371 BGP_POLICY_PREFIX_LIST,
1372 BGP_POLICY_DISTRIBUTE_LIST,
1373 } bgp_policy_type_e;
1374
1375 extern struct bgp_master *bm;
1376 extern unsigned int multipath_num;
1377
1378 /* Prototypes. */
1379 extern void bgp_terminate(void);
1380 extern void bgp_reset(void);
1381 extern time_t bgp_clock(void);
1382 extern void bgp_zclient_reset(void);
1383 extern int bgp_nexthop_set(union sockunion *, union sockunion *,
1384 struct bgp_nexthop *, struct peer *);
1385 extern struct bgp *bgp_get_default(void);
1386 extern struct bgp *bgp_lookup(as_t, const char *);
1387 extern struct bgp *bgp_lookup_by_name(const char *);
1388 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1389 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1390 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1391 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1392 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1393 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1394 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1395 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1396 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1397 union sockunion *,
1398 struct peer_group *);
1399 extern struct prefix *
1400 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1401 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1402 struct prefix *,
1403 struct prefix **);
1404 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1405 union sockunion *);
1406 extern void peer_drop_dynamic_neighbor(struct peer *);
1407
1408 /*
1409 * Peers are incredibly easy to memory leak
1410 * due to the various ways that they are actually used
1411 * Provide some functionality to debug locks and unlocks
1412 */
1413 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1414 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1415 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1416 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1417
1418 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1419 extern int peer_active(struct peer *);
1420 extern int peer_active_nego(struct peer *);
1421 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1422 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1423 as_t, as_t, int, afi_t, safi_t,
1424 struct peer_group *);
1425 extern struct peer *peer_create_accept(struct bgp *);
1426 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1427 extern char *peer_uptime(time_t, char *, size_t, uint8_t, json_object *);
1428
1429 extern int bgp_config_write(struct vty *);
1430
1431 extern void bgp_master_init(struct thread_master *master);
1432
1433 extern void bgp_init(void);
1434 extern void bgp_pthreads_run(void);
1435 extern void bgp_pthreads_finish(void);
1436 extern void bgp_route_map_init(void);
1437 extern void bgp_session_reset(struct peer *);
1438
1439 extern int bgp_option_set(int);
1440 extern int bgp_option_unset(int);
1441 extern int bgp_option_check(int);
1442
1443 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1444 extern void bgp_instance_up(struct bgp *);
1445 extern void bgp_instance_down(struct bgp *);
1446 extern int bgp_delete(struct bgp *);
1447
1448 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1449 vrf_id_t old_vrf_id, bool create);
1450
1451 extern int bgp_flag_set(struct bgp *, int);
1452 extern int bgp_flag_unset(struct bgp *, int);
1453 extern int bgp_flag_check(struct bgp *, int);
1454
1455 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1456 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1457
1458 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1459 extern int bgp_cluster_id_unset(struct bgp *);
1460
1461 extern int bgp_confederation_id_set(struct bgp *, as_t);
1462 extern int bgp_confederation_id_unset(struct bgp *);
1463 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1464
1465 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1466 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1467
1468 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1469 extern int bgp_timers_unset(struct bgp *);
1470
1471 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1472 extern int bgp_default_local_preference_unset(struct bgp *);
1473
1474 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1475 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1476
1477 extern int bgp_listen_limit_set(struct bgp *, int);
1478 extern int bgp_listen_limit_unset(struct bgp *);
1479
1480 extern int bgp_update_delay_active(struct bgp *);
1481 extern int bgp_update_delay_configured(struct bgp *);
1482 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1483 extern void peer_as_change(struct peer *, as_t, int);
1484 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1485 int, afi_t, safi_t);
1486 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1487 extern int peer_delete(struct peer *peer);
1488 extern int peer_group_delete(struct peer_group *);
1489 extern int peer_group_remote_as_delete(struct peer_group *);
1490 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1491
1492 extern int peer_activate(struct peer *, afi_t, safi_t);
1493 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1494 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1495
1496 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1497 struct peer_group *, as_t *);
1498 extern int peer_group_unbind(struct bgp *, struct peer *, struct peer_group *);
1499
1500 extern int peer_flag_set(struct peer *, uint32_t);
1501 extern int peer_flag_unset(struct peer *, uint32_t);
1502
1503 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1504 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1505 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1506
1507 extern int peer_ebgp_multihop_set(struct peer *, int);
1508 extern int peer_ebgp_multihop_unset(struct peer *);
1509 extern int is_ebgp_multihop_configured(struct peer *peer);
1510
1511 extern int peer_description_set(struct peer *, const char *);
1512 extern int peer_description_unset(struct peer *);
1513
1514 extern int peer_update_source_if_set(struct peer *, const char *);
1515 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1516 extern int peer_update_source_unset(struct peer *);
1517
1518 extern int peer_default_originate_set(struct peer *, afi_t, safi_t,
1519 const char *);
1520 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1521
1522 extern int peer_port_set(struct peer *, uint16_t);
1523 extern int peer_port_unset(struct peer *);
1524
1525 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1526 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1527
1528 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1529 uint32_t holdtime);
1530 extern int peer_timers_unset(struct peer *);
1531
1532 extern int peer_timers_connect_set(struct peer *, uint32_t);
1533 extern int peer_timers_connect_unset(struct peer *);
1534
1535 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1536 extern int peer_advertise_interval_unset(struct peer *);
1537
1538 extern void peer_interface_set(struct peer *, const char *);
1539 extern void peer_interface_unset(struct peer *);
1540
1541 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1542 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1543
1544 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1545 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1546
1547 extern int peer_local_as_set(struct peer *, as_t, int, int);
1548 extern int peer_local_as_unset(struct peer *);
1549
1550 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1551 const char *);
1552 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1553
1554 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1555 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1556
1557 extern int peer_route_map_set(struct peer *, afi_t, safi_t, int, const char *);
1558 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1559
1560 extern int peer_unsuppress_map_set(struct peer *, afi_t, safi_t, const char *);
1561
1562 extern int peer_password_set(struct peer *, const char *);
1563 extern int peer_password_unset(struct peer *);
1564
1565 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1566
1567 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1568 uint8_t, int, uint16_t);
1569 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1570
1571 extern int peer_clear(struct peer *, struct listnode **);
1572 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1573
1574 extern int peer_ttl_security_hops_set(struct peer *, int);
1575 extern int peer_ttl_security_hops_unset(struct peer *);
1576
1577 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1578 extern int peer_tx_shutdown_message_unset(struct peer *);
1579
1580 extern int bgp_route_map_update_timer(struct thread *thread);
1581 extern void bgp_route_map_terminate(void);
1582
1583 extern int peer_cmp(struct peer *p1, struct peer *p2);
1584
1585 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1586 afi_t *afi, safi_t *safi);
1587 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1588 iana_afi_t *pkt_afi,
1589 iana_safi_t *pkt_safi);
1590
1591 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1592 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1593 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1594
1595 extern void bgp_close(void);
1596 extern void bgp_free(struct bgp *);
1597
1598 static inline struct bgp *bgp_lock(struct bgp *bgp)
1599 {
1600 bgp->lock++;
1601 return bgp;
1602 }
1603
1604 static inline void bgp_unlock(struct bgp *bgp)
1605 {
1606 assert(bgp->lock > 0);
1607 if (--bgp->lock == 0)
1608 bgp_free(bgp);
1609 }
1610
1611 static inline int afindex(afi_t afi, safi_t safi)
1612 {
1613 switch (afi) {
1614 case AFI_IP:
1615 switch (safi) {
1616 case SAFI_UNICAST:
1617 return BGP_AF_IPV4_UNICAST;
1618 break;
1619 case SAFI_MULTICAST:
1620 return BGP_AF_IPV4_MULTICAST;
1621 break;
1622 case SAFI_LABELED_UNICAST:
1623 return BGP_AF_IPV4_LBL_UNICAST;
1624 break;
1625 case SAFI_MPLS_VPN:
1626 return BGP_AF_IPV4_VPN;
1627 break;
1628 case SAFI_ENCAP:
1629 return BGP_AF_IPV4_ENCAP;
1630 break;
1631 case SAFI_FLOWSPEC:
1632 return BGP_AF_IPV4_FLOWSPEC;
1633 default:
1634 return BGP_AF_MAX;
1635 break;
1636 }
1637 break;
1638 case AFI_IP6:
1639 switch (safi) {
1640 case SAFI_UNICAST:
1641 return BGP_AF_IPV6_UNICAST;
1642 break;
1643 case SAFI_MULTICAST:
1644 return BGP_AF_IPV6_MULTICAST;
1645 break;
1646 case SAFI_LABELED_UNICAST:
1647 return BGP_AF_IPV6_LBL_UNICAST;
1648 break;
1649 case SAFI_MPLS_VPN:
1650 return BGP_AF_IPV6_VPN;
1651 break;
1652 case SAFI_ENCAP:
1653 return BGP_AF_IPV6_ENCAP;
1654 break;
1655 case SAFI_FLOWSPEC:
1656 return BGP_AF_IPV6_FLOWSPEC;
1657 default:
1658 return BGP_AF_MAX;
1659 break;
1660 }
1661 break;
1662 case AFI_L2VPN:
1663 switch (safi) {
1664 case SAFI_EVPN:
1665 return BGP_AF_L2VPN_EVPN;
1666 break;
1667 default:
1668 return BGP_AF_MAX;
1669 break;
1670 }
1671 default:
1672 return BGP_AF_MAX;
1673 break;
1674 }
1675 }
1676
1677 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1678 static inline int peer_group_active(struct peer *peer)
1679 {
1680 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1681 return 1;
1682 return 0;
1683 }
1684
1685 /* If peer is negotiated at least one address family return 1. */
1686 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1687 {
1688 if (peer->afc_nego[afi][SAFI_UNICAST]
1689 || peer->afc_nego[afi][SAFI_MULTICAST]
1690 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1691 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1692 || peer->afc_nego[afi][SAFI_ENCAP]
1693 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1694 || peer->afc_nego[afi][SAFI_EVPN])
1695 return 1;
1696 return 0;
1697 }
1698
1699 /* If at least one address family activated for group, return 1. */
1700 static inline int peer_group_af_configured(struct peer_group *group)
1701 {
1702 struct peer *peer = group->conf;
1703
1704 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1705 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1706 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1707 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1708 || peer->afc[AFI_IP6][SAFI_UNICAST]
1709 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1710 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1711 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1712 || peer->afc[AFI_IP6][SAFI_ENCAP]
1713 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1714 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1715 return 1;
1716 return 0;
1717 }
1718
1719 static inline char *timestamp_string(time_t ts)
1720 {
1721 time_t tbuf;
1722 tbuf = time(NULL) - (bgp_clock() - ts);
1723 return ctime(&tbuf);
1724 }
1725
1726 static inline int peer_established(struct peer *peer)
1727 {
1728 if (peer->status == Established)
1729 return 1;
1730 return 0;
1731 }
1732
1733 static inline int peer_dynamic_neighbor(struct peer *peer)
1734 {
1735 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1736 }
1737
1738 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1739 {
1740 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1741 }
1742
1743 /* Lookup VRF for BGP instance based on its type. */
1744 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1745 {
1746 struct vrf *vrf;
1747
1748 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1749 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1750 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1751 vrf = vrf_lookup_by_name(bgp->name);
1752 else
1753 vrf = NULL;
1754
1755 return vrf;
1756 }
1757
1758 /* Link BGP instance to VRF. */
1759 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1760 {
1761 bgp->vrf_id = vrf->vrf_id;
1762 if (vrf->info != (void *)bgp)
1763 vrf->info = (void *)bgp_lock(bgp);
1764 }
1765
1766 /* Unlink BGP instance from VRF. */
1767 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1768 {
1769 if (vrf->info == (void *)bgp) {
1770 vrf->info = NULL;
1771 bgp_unlock(bgp);
1772 }
1773 bgp->vrf_id = VRF_UNKNOWN;
1774 }
1775
1776 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1777
1778 /* For benefit of rfapi */
1779 extern struct peer *peer_new(struct bgp *bgp);
1780
1781 #endif /* _QUAGGA_BGPD_H */
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