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Merge pull request #2034 from vincentbernat/fix/rfc8365-auto-rt
[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 /* EVPN - use RFC 8365 to auto-derive RT */
485 int advertise_autort_rfc8365;
486
487 /* Hash table of Import RTs to EVIs */
488 struct hash *import_rt_hash;
489
490 /* Hash table of VRF import RTs to VRFs */
491 struct hash *vrf_import_rt_hash;
492
493 /* L3-VNI corresponding to this vrf */
494 vni_t l3vni;
495
496 /* router-mac to be used in mac-ip routes for this vrf */
497 struct ethaddr rmac;
498
499 /* originator ip - to be used as NH for type-5 routes */
500 struct in_addr originator_ip;
501
502 /* vrf flags */
503 uint32_t vrf_flags;
504 #define BGP_VRF_AUTO (1 << 0)
505 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
506 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
507 #define BGP_VRF_RD_CFGD (1 << 3)
508 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
509
510
511 /* unique ID for auto derivation of RD for this vrf */
512 uint16_t vrf_rd_id;
513
514 /* Automatically derived RD for this VRF */
515 struct prefix_rd vrf_prd_auto;
516
517 /* RD for this VRF */
518 struct prefix_rd vrf_prd;
519
520 /* import rt list for the vrf instance */
521 struct list *vrf_import_rtl;
522
523 /* export rt list for the vrf instance */
524 struct list *vrf_export_rtl;
525
526 /* list of corresponding l2vnis (struct bgpevpn) */
527 struct list *l2vnis;
528
529 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
530 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
531
532 struct vpn_policy vpn_policy[AFI_MAX];
533
534 QOBJ_FIELDS
535 };
536 DECLARE_QOBJ_TYPE(bgp)
537
538 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
539
540 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
541 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
542 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
543 && bgp->vrf_id != VRF_UNKNOWN))
544
545 /* BGP peer-group support. */
546 struct peer_group {
547 /* Name of the peer-group. */
548 char *name;
549
550 /* Pointer to BGP. */
551 struct bgp *bgp;
552
553 /* Peer-group client list. */
554 struct list *peer;
555
556 /** Dynamic neighbor listening ranges */
557 struct list *listen_range[AFI_MAX];
558
559 /* Peer-group config */
560 struct peer *conf;
561 };
562
563 /* BGP Notify message format. */
564 struct bgp_notify {
565 uint8_t code;
566 uint8_t subcode;
567 char *data;
568 bgp_size_t length;
569 uint8_t *raw_data;
570 };
571
572 /* Next hop self address. */
573 struct bgp_nexthop {
574 struct interface *ifp;
575 struct in_addr v4;
576 struct in6_addr v6_global;
577 struct in6_addr v6_local;
578 };
579
580 /* BGP addpath values */
581 #define BGP_ADDPATH_RX 1
582 #define BGP_ADDPATH_TX 2
583 #define BGP_ADDPATH_ID_LEN 4
584
585 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
586
587 /* BGP router distinguisher value. */
588 #define BGP_RD_SIZE 8
589
590 struct bgp_rd {
591 uint8_t val[BGP_RD_SIZE];
592 };
593
594 #define RMAP_IN 0
595 #define RMAP_OUT 1
596 #define RMAP_MAX 2
597
598 #include "filter.h"
599
600 /* BGP filter structure. */
601 struct bgp_filter {
602 /* Distribute-list. */
603 struct {
604 char *name;
605 struct access_list *alist;
606 } dlist[FILTER_MAX];
607
608 /* Prefix-list. */
609 struct {
610 char *name;
611 struct prefix_list *plist;
612 } plist[FILTER_MAX];
613
614 /* Filter-list. */
615 struct {
616 char *name;
617 struct as_list *aslist;
618 } aslist[FILTER_MAX];
619
620 /* Route-map. */
621 struct {
622 char *name;
623 struct route_map *map;
624 } map[RMAP_MAX];
625
626 /* Unsuppress-map. */
627 struct {
628 char *name;
629 struct route_map *map;
630 } usmap;
631 };
632
633 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
634 a peer who's AS is part of our Confederation. */
635 typedef enum {
636 BGP_PEER_IBGP = 1,
637 BGP_PEER_EBGP,
638 BGP_PEER_INTERNAL,
639 BGP_PEER_CONFED,
640 } bgp_peer_sort_t;
641
642 /* BGP message header and packet size. */
643 #define BGP_MARKER_SIZE 16
644 #define BGP_HEADER_SIZE 19
645 #define BGP_MAX_PACKET_SIZE 4096
646 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
647
648 /*
649 * Trigger delay for bgp_announce_route().
650 */
651 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
652 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
653
654 struct peer_af {
655 /* back pointer to the peer */
656 struct peer *peer;
657
658 /* which subgroup the peer_af belongs to */
659 struct update_subgroup *subgroup;
660
661 /* for being part of an update subgroup's peer list */
662 LIST_ENTRY(peer_af) subgrp_train;
663
664 /* for being part of a packet's peer list */
665 LIST_ENTRY(peer_af) pkt_train;
666
667 struct bpacket *next_pkt_to_send;
668
669 /*
670 * Trigger timer for bgp_announce_route().
671 */
672 struct thread *t_announce_route;
673
674 afi_t afi;
675 safi_t safi;
676 int afid;
677 };
678
679 /* BGP neighbor structure. */
680 struct peer {
681 /* BGP structure. */
682 struct bgp *bgp;
683
684 /* reference count, primarily to allow bgp_process'ing of route_node's
685 * to be done after a struct peer is deleted.
686 *
687 * named 'lock' for hysterical reasons within Quagga.
688 */
689 int lock;
690
691 /* BGP peer group. */
692 struct peer_group *group;
693 uint64_t version[AFI_MAX][SAFI_MAX];
694
695 /* BGP peer_af structures, per configured AF on this peer */
696 struct peer_af *peer_af_array[BGP_AF_MAX];
697
698 /* Peer's remote AS number. */
699 int as_type;
700 as_t as;
701
702 /* Peer's local AS number. */
703 as_t local_as;
704
705 bgp_peer_sort_t sort;
706
707 /* Peer's Change local AS number. */
708 as_t change_local_as;
709
710 /* Remote router ID. */
711 struct in_addr remote_id;
712
713 /* Local router ID. */
714 struct in_addr local_id;
715
716 /* Packet receive and send buffer. */
717 pthread_mutex_t io_mtx; // guards ibuf, obuf
718 struct stream_fifo *ibuf; // packets waiting to be processed
719 struct stream_fifo *obuf; // packets waiting to be written
720
721 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
722 struct stream *obuf_work; // WiP buffer used to construct packets
723
724 struct stream *curr; // the current packet being parsed
725
726 /* We use a separate stream to encode MP_REACH_NLRI for efficient
727 * NLRI packing. peer->obuf_work stores all the other attributes. The
728 * actual packet is then constructed by concatenating the two.
729 */
730 struct stream *scratch;
731
732 /* the doppelganger peer structure, due to dual TCP conn setup */
733 struct peer *doppelganger;
734
735 /* Status of the peer. */
736 int status;
737 int ostatus;
738
739 /* FSM events, stored for debug purposes.
740 * Note: uchar used for reduced memory usage.
741 */
742 unsigned char cur_event;
743 unsigned char last_event;
744 unsigned char last_major_event;
745
746 /* Peer index, used for dumping TABLE_DUMP_V2 format */
747 uint16_t table_dump_index;
748
749 /* Peer information */
750 int fd; /* File descriptor */
751 int ttl; /* TTL of TCP connection to the peer. */
752 int rtt; /* Estimated round-trip-time from TCP_INFO */
753 int gtsm_hops; /* minimum hopcount to peer */
754 char *desc; /* Description of the peer. */
755 unsigned short port; /* Destination port for peer */
756 char *host; /* Printable address of the peer. */
757 union sockunion su; /* Sockunion address of the peer. */
758 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
759 time_t uptime; /* Last Up/Down time */
760 time_t readtime; /* Last read time */
761 time_t resettime; /* Last reset time */
762
763 char *conf_if; /* neighbor interface config name. */
764 struct interface *ifp; /* corresponding interface */
765 char *ifname; /* bind interface name. */
766 char *update_if;
767 union sockunion *update_source;
768
769 union sockunion *su_local; /* Sockunion of local address. */
770 union sockunion *su_remote; /* Sockunion of remote address. */
771 int shared_network; /* Is this peer shared same network. */
772 struct bgp_nexthop nexthop; /* Nexthop */
773
774 /* Peer address family configuration. */
775 uint8_t afc[AFI_MAX][SAFI_MAX];
776 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
777 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
778 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
779
780 /* Capability flags (reset in bgp_stop) */
781 uint32_t cap;
782 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
783 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
784 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
785 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
786 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
787 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
788 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
789 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
790 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
791 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
792 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
793 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
794 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
795 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
796 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
797 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
798 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
799
800 /* Capability flags (reset in bgp_stop) */
801 uint32_t af_cap[AFI_MAX][SAFI_MAX];
802 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
803 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
804 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
805 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
806 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
807 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
808 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
809 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
810 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
811 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
812 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
813 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
814 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
815 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
816 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
817
818 /* Global configuration flags. */
819 uint32_t flags;
820 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
821 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
822 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
823 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
824 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
825 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
826 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
827 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
828 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
829 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
830 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
831 #define PEER_FLAG_LONESOUL (1 << 11)
832 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
833 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
834 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
835 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
836
837 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
838 char *tx_shutdown_message;
839
840 /* NSF mode (graceful restart) */
841 uint8_t nsf[AFI_MAX][SAFI_MAX];
842
843 /* Peer Per AF flags */
844 /*
845 * Parallel array to af_flags that indicates whether each flag
846 * originates from a peer-group or if it is config that is specific to
847 * this individual peer. If a flag is set independent of the
848 * peer-group the same bit should be set here. If this peer is a
849 * peer-group, this memory region should be all zeros. The assumption
850 * is that the default state for all flags is unset.
851 *
852 * Notes:
853 * - if a flag for an individual peer is unset, the corresponding
854 * override flag is unset and the peer is considered to be back in
855 * sync with the peer-group.
856 * - This does *not* contain the flag values, rather it contains
857 * whether the flag at the same position in af_flags is
858 * *peer-specific*.
859 */
860 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
861 /*
862 * Effective flags, computed by applying peer-group flags and then
863 * overriding with individual flags
864 */
865 uint32_t af_flags[AFI_MAX][SAFI_MAX];
866 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
867 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
868 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
869 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
870 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
871 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
872 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
873 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
874 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
875 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
876 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
877 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
878 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
879 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
880 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
881 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
882 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
883 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
884 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
885 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
886 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
887 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
888 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS (1 << 22) /* addpath-tx-all-paths */
889 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
890 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
891 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
892 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
893
894 /* MD5 password */
895 char *password;
896
897 /* default-originate route-map. */
898 struct {
899 char *name;
900 struct route_map *map;
901 } default_rmap[AFI_MAX][SAFI_MAX];
902
903 /* Peer status flags. */
904 uint16_t sflags;
905 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
906 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
907 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
908 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
909 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
910 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
911 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
912
913 /* Peer status af flags (reset in bgp_stop) */
914 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
915 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
916 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
917 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
918 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
919 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
920 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
921
922 /* Default attribute value for the peer. */
923 uint32_t config;
924 #define PEER_CONFIG_TIMER (1 << 0) /* keepalive & holdtime */
925 #define PEER_CONFIG_CONNECT (1 << 1) /* connect */
926 #define PEER_CONFIG_ROUTEADV (1 << 2) /* route advertise */
927 #define PEER_GROUP_CONFIG_TIMER (1 << 3) /* timers from peer-group */
928
929 #define PEER_OR_GROUP_TIMER_SET(peer) \
930 (CHECK_FLAG(peer->config, PEER_CONFIG_TIMER) \
931 || CHECK_FLAG(peer->config, PEER_GROUP_CONFIG_TIMER))
932
933 _Atomic uint32_t holdtime;
934 _Atomic uint32_t keepalive;
935 _Atomic uint32_t connect;
936 _Atomic uint32_t routeadv;
937
938 /* Timer values. */
939 _Atomic uint32_t v_start;
940 _Atomic uint32_t v_connect;
941 _Atomic uint32_t v_holdtime;
942 _Atomic uint32_t v_keepalive;
943 _Atomic uint32_t v_routeadv;
944 _Atomic uint32_t v_pmax_restart;
945 _Atomic uint32_t v_gr_restart;
946
947 /* Threads. */
948 struct thread *t_read;
949 struct thread *t_write;
950 struct thread *t_start;
951 struct thread *t_connect_check_r;
952 struct thread *t_connect_check_w;
953 struct thread *t_connect;
954 struct thread *t_holdtime;
955 struct thread *t_routeadv;
956 struct thread *t_pmax_restart;
957 struct thread *t_gr_restart;
958 struct thread *t_gr_stale;
959 struct thread *t_generate_updgrp_packets;
960 struct thread *t_process_packet;
961
962 /* Thread flags. */
963 _Atomic uint16_t thread_flags;
964 #define PEER_THREAD_WRITES_ON (1 << 0)
965 #define PEER_THREAD_READS_ON (1 << 1)
966 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
967 /* workqueues */
968 struct work_queue *clear_node_queue;
969
970 #define PEER_TOTAL_RX(peer) \
971 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
972 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
973 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
974 + atomic_load_explicit(&peer->refresh_in, \
975 memory_order_relaxed) \
976 + atomic_load_explicit(&peer->keepalive_in, \
977 memory_order_relaxed) \
978 + atomic_load_explicit(&peer->dynamic_cap_in, \
979 memory_order_relaxed)
980
981 #define PEER_TOTAL_TX(peer) \
982 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
983 + atomic_load_explicit(&peer->update_out, \
984 memory_order_relaxed) \
985 + atomic_load_explicit(&peer->notify_out, \
986 memory_order_relaxed) \
987 + atomic_load_explicit(&peer->refresh_out, \
988 memory_order_relaxed) \
989 + atomic_load_explicit(&peer->keepalive_out, \
990 memory_order_relaxed) \
991 + atomic_load_explicit(&peer->dynamic_cap_out, \
992 memory_order_relaxed)
993
994 /* Statistics field */
995 _Atomic uint32_t open_in; /* Open message input count */
996 _Atomic uint32_t open_out; /* Open message output count */
997 _Atomic uint32_t update_in; /* Update message input count */
998 _Atomic uint32_t update_out; /* Update message ouput count */
999 _Atomic time_t update_time; /* Update message received time. */
1000 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1001 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1002 _Atomic uint32_t notify_in; /* Notify input count */
1003 _Atomic uint32_t notify_out; /* Notify output count */
1004 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1005 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1006 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1007 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1008
1009 /* BGP state count */
1010 uint32_t established; /* Established */
1011 uint32_t dropped; /* Dropped */
1012
1013 /* Update delay related fields */
1014 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1015 for EOR */
1016
1017 /* Syncronization list and time. */
1018 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1019 time_t synctime;
1020 /* timestamp when the last UPDATE msg was written */
1021 _Atomic time_t last_write;
1022 /* timestamp when the last msg was written */
1023 _Atomic time_t last_update;
1024
1025 /* Send prefix count. */
1026 unsigned long scount[AFI_MAX][SAFI_MAX];
1027
1028 /* Notify data. */
1029 struct bgp_notify notify;
1030
1031 /* Filter structure. */
1032 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1033
1034 /* ORF Prefix-list */
1035 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1036
1037 /* Text description of last attribute rcvd */
1038 char rcvd_attr_str[BUFSIZ];
1039
1040 /* Track if we printed the attribute in debugs */
1041 int rcvd_attr_printed;
1042
1043 /* Prefix count. */
1044 unsigned long pcount[AFI_MAX][SAFI_MAX];
1045
1046 /* Max prefix count. */
1047 unsigned long pmax[AFI_MAX][SAFI_MAX];
1048 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1049 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1050 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1051
1052 /* allowas-in. */
1053 char allowas_in[AFI_MAX][SAFI_MAX];
1054
1055 /* weight */
1056 unsigned long weight[AFI_MAX][SAFI_MAX];
1057
1058 /* peer reset cause */
1059 char last_reset;
1060 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1061 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1062 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1063 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1064 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1065 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1066 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1067 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1068 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1069 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1070 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1071 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1072 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1073 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1074 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1075 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1076 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1077 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1078 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1079 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1080 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1081 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1082 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1083 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1084 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1085 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1086 unsigned long last_reset_cause_size;
1087 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1088
1089 /* The kind of route-map Flags.*/
1090 uint8_t rmap_type;
1091 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1092 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1093 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1094 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1095 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1096 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1097 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1098 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1099
1100 /* peer specific BFD information */
1101 struct bfd_info *bfd_info;
1102
1103 /* hostname and domainname advertised by host */
1104 char *hostname;
1105 char *domainname;
1106
1107 QOBJ_FIELDS
1108 };
1109 DECLARE_QOBJ_TYPE(peer)
1110
1111 /* Check if suppress start/restart of sessions to peer. */
1112 #define BGP_PEER_START_SUPPRESSED(P) \
1113 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1114 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1115
1116 #define PEER_PASSWORD_MINLEN (1)
1117 #define PEER_PASSWORD_MAXLEN (80)
1118
1119 /* This structure's member directly points incoming packet data
1120 stream. */
1121 struct bgp_nlri {
1122 /* AFI. */
1123 uint16_t afi; /* iana_afi_t */
1124
1125 /* SAFI. */
1126 uint8_t safi; /* iana_safi_t */
1127
1128 /* Pointer to NLRI byte stream. */
1129 uint8_t *nlri;
1130
1131 /* Length of whole NLRI. */
1132 bgp_size_t length;
1133 };
1134
1135 /* BGP versions. */
1136 #define BGP_VERSION_4 4
1137
1138 /* Default BGP port number. */
1139 #define BGP_PORT_DEFAULT 179
1140
1141 /* BGP minimum message size. */
1142 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1143 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1144 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1145 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1146 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1147 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1148
1149 /* BGP message types. */
1150 #define BGP_MSG_OPEN 1
1151 #define BGP_MSG_UPDATE 2
1152 #define BGP_MSG_NOTIFY 3
1153 #define BGP_MSG_KEEPALIVE 4
1154 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1155 #define BGP_MSG_CAPABILITY 6
1156 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1157
1158 /* BGP open optional parameter. */
1159 #define BGP_OPEN_OPT_AUTH 1
1160 #define BGP_OPEN_OPT_CAP 2
1161
1162 /* BGP4 attribute type codes. */
1163 #define BGP_ATTR_ORIGIN 1
1164 #define BGP_ATTR_AS_PATH 2
1165 #define BGP_ATTR_NEXT_HOP 3
1166 #define BGP_ATTR_MULTI_EXIT_DISC 4
1167 #define BGP_ATTR_LOCAL_PREF 5
1168 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1169 #define BGP_ATTR_AGGREGATOR 7
1170 #define BGP_ATTR_COMMUNITIES 8
1171 #define BGP_ATTR_ORIGINATOR_ID 9
1172 #define BGP_ATTR_CLUSTER_LIST 10
1173 #define BGP_ATTR_DPA 11
1174 #define BGP_ATTR_ADVERTISER 12
1175 #define BGP_ATTR_RCID_PATH 13
1176 #define BGP_ATTR_MP_REACH_NLRI 14
1177 #define BGP_ATTR_MP_UNREACH_NLRI 15
1178 #define BGP_ATTR_EXT_COMMUNITIES 16
1179 #define BGP_ATTR_AS4_PATH 17
1180 #define BGP_ATTR_AS4_AGGREGATOR 18
1181 #define BGP_ATTR_AS_PATHLIMIT 21
1182 #define BGP_ATTR_PMSI_TUNNEL 22
1183 #define BGP_ATTR_ENCAP 23
1184 #define BGP_ATTR_LARGE_COMMUNITIES 32
1185 #define BGP_ATTR_PREFIX_SID 40
1186 #if ENABLE_BGP_VNC
1187 #define BGP_ATTR_VNC 255
1188 #endif
1189
1190 /* BGP update origin. */
1191 #define BGP_ORIGIN_IGP 0
1192 #define BGP_ORIGIN_EGP 1
1193 #define BGP_ORIGIN_INCOMPLETE 2
1194
1195 /* BGP notify message codes. */
1196 #define BGP_NOTIFY_HEADER_ERR 1
1197 #define BGP_NOTIFY_OPEN_ERR 2
1198 #define BGP_NOTIFY_UPDATE_ERR 3
1199 #define BGP_NOTIFY_HOLD_ERR 4
1200 #define BGP_NOTIFY_FSM_ERR 5
1201 #define BGP_NOTIFY_CEASE 6
1202 #define BGP_NOTIFY_CAPABILITY_ERR 7
1203
1204 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1205
1206 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1207 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1208 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1209 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1210
1211 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1212 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1213 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1214 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1215 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1216 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1217 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1218 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1219 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1220
1221 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1222 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1223 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1224 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1225 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1226 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1227 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1228 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1229 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1230 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1231 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1232 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1233
1234 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1235 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1236 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1237 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1238 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1239 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1240 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1241 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1242 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1243
1244 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1245 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1246 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1247 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1248
1249 /* BGP finite state machine status. */
1250 #define Idle 1
1251 #define Connect 2
1252 #define Active 3
1253 #define OpenSent 4
1254 #define OpenConfirm 5
1255 #define Established 6
1256 #define Clearing 7
1257 #define Deleted 8
1258 #define BGP_STATUS_MAX 9
1259
1260 /* BGP finite state machine events. */
1261 #define BGP_Start 1
1262 #define BGP_Stop 2
1263 #define TCP_connection_open 3
1264 #define TCP_connection_closed 4
1265 #define TCP_connection_open_failed 5
1266 #define TCP_fatal_error 6
1267 #define ConnectRetry_timer_expired 7
1268 #define Hold_Timer_expired 8
1269 #define KeepAlive_timer_expired 9
1270 #define Receive_OPEN_message 10
1271 #define Receive_KEEPALIVE_message 11
1272 #define Receive_UPDATE_message 12
1273 #define Receive_NOTIFICATION_message 13
1274 #define Clearing_Completed 14
1275 #define BGP_EVENTS_MAX 15
1276
1277 /* BGP timers default value. */
1278 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1279 #define BGP_INIT_START_TIMER 1
1280 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1281 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1282 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1283 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1284 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1285
1286 /* BGP default local preference. */
1287 #define BGP_DEFAULT_LOCAL_PREF 100
1288
1289 /* BGP local-preference to send when 'bgp graceful-shutdown'
1290 * is configured */
1291 #define BGP_GSHUT_LOCAL_PREF 0
1292
1293 /* BGP default subgroup packet queue max . */
1294 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1295
1296 /* BGP graceful restart */
1297 #define BGP_DEFAULT_RESTART_TIME 120
1298 #define BGP_DEFAULT_STALEPATH_TIME 360
1299
1300 /* BGP uptime string length. */
1301 #define BGP_UPTIME_LEN 25
1302
1303 /* Default configuration settings for bgpd. */
1304 #define BGP_VTY_PORT 2605
1305 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1306
1307 /* Check AS path loop when we send NLRI. */
1308 /* #define BGP_SEND_ASPATH_CHECK */
1309
1310 /* BGP Dynamic Neighbors feature */
1311 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1312 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1313 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1314
1315 /* Flag for peer_clear_soft(). */
1316 enum bgp_clear_type {
1317 BGP_CLEAR_SOFT_NONE,
1318 BGP_CLEAR_SOFT_OUT,
1319 BGP_CLEAR_SOFT_IN,
1320 BGP_CLEAR_SOFT_BOTH,
1321 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1322 };
1323
1324 /* Macros. */
1325 #define BGP_INPUT(P) ((P)->curr)
1326 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1327 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1328 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1329
1330 /* BGP error codes. */
1331 #define BGP_SUCCESS 0
1332 #define BGP_ERR_INVALID_VALUE -1
1333 #define BGP_ERR_INVALID_FLAG -2
1334 #define BGP_ERR_INVALID_AS -3
1335 #define BGP_ERR_INVALID_BGP -4
1336 #define BGP_ERR_PEER_GROUP_MEMBER -5
1337 #define BGP_ERR_MULTIPLE_INSTANCE_USED -6
1338 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1339 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1340 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1341 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1342 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET -11
1343 #define BGP_ERR_AS_MISMATCH -12
1344 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1345 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1346 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1347 #define BGP_ERR_NOT_INTERNAL_PEER -16
1348 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1349 #define BGP_ERR_AF_UNCONFIGURED -18
1350 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1351 #define BGP_ERR_INSTANCE_MISMATCH -20
1352 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1353 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1354 #define BGP_ERR_TCPSIG_FAILED -23
1355 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1356 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1357 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1358 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1359 #define BGP_ERR_AS_OVERRIDE -28
1360 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1361 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1362 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1363 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1364 #define BGP_ERR_MAX -33
1365 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1366 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1367
1368 /*
1369 * Enumeration of different policy kinds a peer can be configured with.
1370 */
1371 typedef enum {
1372 BGP_POLICY_ROUTE_MAP,
1373 BGP_POLICY_FILTER_LIST,
1374 BGP_POLICY_PREFIX_LIST,
1375 BGP_POLICY_DISTRIBUTE_LIST,
1376 } bgp_policy_type_e;
1377
1378 extern struct bgp_master *bm;
1379 extern unsigned int multipath_num;
1380
1381 /* Prototypes. */
1382 extern void bgp_terminate(void);
1383 extern void bgp_reset(void);
1384 extern time_t bgp_clock(void);
1385 extern void bgp_zclient_reset(void);
1386 extern int bgp_nexthop_set(union sockunion *, union sockunion *,
1387 struct bgp_nexthop *, struct peer *);
1388 extern struct bgp *bgp_get_default(void);
1389 extern struct bgp *bgp_lookup(as_t, const char *);
1390 extern struct bgp *bgp_lookup_by_name(const char *);
1391 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1392 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1393 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1394 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1395 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1396 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1397 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1398 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1399 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1400 union sockunion *,
1401 struct peer_group *);
1402 extern struct prefix *
1403 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1404 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1405 struct prefix *,
1406 struct prefix **);
1407 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1408 union sockunion *);
1409 extern void peer_drop_dynamic_neighbor(struct peer *);
1410
1411 /*
1412 * Peers are incredibly easy to memory leak
1413 * due to the various ways that they are actually used
1414 * Provide some functionality to debug locks and unlocks
1415 */
1416 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1417 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1418 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1419 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1420
1421 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1422 extern int peer_active(struct peer *);
1423 extern int peer_active_nego(struct peer *);
1424 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1425 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1426 as_t, as_t, int, afi_t, safi_t,
1427 struct peer_group *);
1428 extern struct peer *peer_create_accept(struct bgp *);
1429 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1430 extern char *peer_uptime(time_t, char *, size_t, uint8_t, json_object *);
1431
1432 extern int bgp_config_write(struct vty *);
1433
1434 extern void bgp_master_init(struct thread_master *master);
1435
1436 extern void bgp_init(void);
1437 extern void bgp_pthreads_run(void);
1438 extern void bgp_pthreads_finish(void);
1439 extern void bgp_route_map_init(void);
1440 extern void bgp_session_reset(struct peer *);
1441
1442 extern int bgp_option_set(int);
1443 extern int bgp_option_unset(int);
1444 extern int bgp_option_check(int);
1445
1446 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1447 extern void bgp_instance_up(struct bgp *);
1448 extern void bgp_instance_down(struct bgp *);
1449 extern int bgp_delete(struct bgp *);
1450
1451 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1452 vrf_id_t old_vrf_id, bool create);
1453
1454 extern int bgp_flag_set(struct bgp *, int);
1455 extern int bgp_flag_unset(struct bgp *, int);
1456 extern int bgp_flag_check(struct bgp *, int);
1457
1458 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1459 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1460
1461 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1462 extern int bgp_cluster_id_unset(struct bgp *);
1463
1464 extern int bgp_confederation_id_set(struct bgp *, as_t);
1465 extern int bgp_confederation_id_unset(struct bgp *);
1466 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1467
1468 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1469 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1470
1471 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1472 extern int bgp_timers_unset(struct bgp *);
1473
1474 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1475 extern int bgp_default_local_preference_unset(struct bgp *);
1476
1477 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1478 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1479
1480 extern int bgp_listen_limit_set(struct bgp *, int);
1481 extern int bgp_listen_limit_unset(struct bgp *);
1482
1483 extern int bgp_update_delay_active(struct bgp *);
1484 extern int bgp_update_delay_configured(struct bgp *);
1485 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1486 extern void peer_as_change(struct peer *, as_t, int);
1487 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1488 int, afi_t, safi_t);
1489 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1490 extern int peer_delete(struct peer *peer);
1491 extern int peer_group_delete(struct peer_group *);
1492 extern int peer_group_remote_as_delete(struct peer_group *);
1493 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1494
1495 extern int peer_activate(struct peer *, afi_t, safi_t);
1496 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1497 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1498
1499 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1500 struct peer_group *, as_t *);
1501 extern int peer_group_unbind(struct bgp *, struct peer *, struct peer_group *);
1502
1503 extern int peer_flag_set(struct peer *, uint32_t);
1504 extern int peer_flag_unset(struct peer *, uint32_t);
1505
1506 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1507 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1508 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1509
1510 extern int peer_ebgp_multihop_set(struct peer *, int);
1511 extern int peer_ebgp_multihop_unset(struct peer *);
1512 extern int is_ebgp_multihop_configured(struct peer *peer);
1513
1514 extern int peer_description_set(struct peer *, const char *);
1515 extern int peer_description_unset(struct peer *);
1516
1517 extern int peer_update_source_if_set(struct peer *, const char *);
1518 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1519 extern int peer_update_source_unset(struct peer *);
1520
1521 extern int peer_default_originate_set(struct peer *, afi_t, safi_t,
1522 const char *);
1523 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1524
1525 extern int peer_port_set(struct peer *, uint16_t);
1526 extern int peer_port_unset(struct peer *);
1527
1528 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1529 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1530
1531 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1532 uint32_t holdtime);
1533 extern int peer_timers_unset(struct peer *);
1534
1535 extern int peer_timers_connect_set(struct peer *, uint32_t);
1536 extern int peer_timers_connect_unset(struct peer *);
1537
1538 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1539 extern int peer_advertise_interval_unset(struct peer *);
1540
1541 extern void peer_interface_set(struct peer *, const char *);
1542 extern void peer_interface_unset(struct peer *);
1543
1544 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1545 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1546
1547 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1548 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1549
1550 extern int peer_local_as_set(struct peer *, as_t, int, int);
1551 extern int peer_local_as_unset(struct peer *);
1552
1553 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1554 const char *);
1555 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1556
1557 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1558 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1559
1560 extern int peer_route_map_set(struct peer *, afi_t, safi_t, int, const char *);
1561 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1562
1563 extern int peer_unsuppress_map_set(struct peer *, afi_t, safi_t, const char *);
1564
1565 extern int peer_password_set(struct peer *, const char *);
1566 extern int peer_password_unset(struct peer *);
1567
1568 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1569
1570 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1571 uint8_t, int, uint16_t);
1572 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1573
1574 extern int peer_clear(struct peer *, struct listnode **);
1575 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1576
1577 extern int peer_ttl_security_hops_set(struct peer *, int);
1578 extern int peer_ttl_security_hops_unset(struct peer *);
1579
1580 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1581 extern int peer_tx_shutdown_message_unset(struct peer *);
1582
1583 extern int bgp_route_map_update_timer(struct thread *thread);
1584 extern void bgp_route_map_terminate(void);
1585
1586 extern int peer_cmp(struct peer *p1, struct peer *p2);
1587
1588 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1589 afi_t *afi, safi_t *safi);
1590 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1591 iana_afi_t *pkt_afi,
1592 iana_safi_t *pkt_safi);
1593
1594 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1595 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1596 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1597
1598 extern void bgp_close(void);
1599 extern void bgp_free(struct bgp *);
1600
1601 static inline struct bgp *bgp_lock(struct bgp *bgp)
1602 {
1603 bgp->lock++;
1604 return bgp;
1605 }
1606
1607 static inline void bgp_unlock(struct bgp *bgp)
1608 {
1609 assert(bgp->lock > 0);
1610 if (--bgp->lock == 0)
1611 bgp_free(bgp);
1612 }
1613
1614 static inline int afindex(afi_t afi, safi_t safi)
1615 {
1616 switch (afi) {
1617 case AFI_IP:
1618 switch (safi) {
1619 case SAFI_UNICAST:
1620 return BGP_AF_IPV4_UNICAST;
1621 break;
1622 case SAFI_MULTICAST:
1623 return BGP_AF_IPV4_MULTICAST;
1624 break;
1625 case SAFI_LABELED_UNICAST:
1626 return BGP_AF_IPV4_LBL_UNICAST;
1627 break;
1628 case SAFI_MPLS_VPN:
1629 return BGP_AF_IPV4_VPN;
1630 break;
1631 case SAFI_ENCAP:
1632 return BGP_AF_IPV4_ENCAP;
1633 break;
1634 case SAFI_FLOWSPEC:
1635 return BGP_AF_IPV4_FLOWSPEC;
1636 default:
1637 return BGP_AF_MAX;
1638 break;
1639 }
1640 break;
1641 case AFI_IP6:
1642 switch (safi) {
1643 case SAFI_UNICAST:
1644 return BGP_AF_IPV6_UNICAST;
1645 break;
1646 case SAFI_MULTICAST:
1647 return BGP_AF_IPV6_MULTICAST;
1648 break;
1649 case SAFI_LABELED_UNICAST:
1650 return BGP_AF_IPV6_LBL_UNICAST;
1651 break;
1652 case SAFI_MPLS_VPN:
1653 return BGP_AF_IPV6_VPN;
1654 break;
1655 case SAFI_ENCAP:
1656 return BGP_AF_IPV6_ENCAP;
1657 break;
1658 case SAFI_FLOWSPEC:
1659 return BGP_AF_IPV6_FLOWSPEC;
1660 default:
1661 return BGP_AF_MAX;
1662 break;
1663 }
1664 break;
1665 case AFI_L2VPN:
1666 switch (safi) {
1667 case SAFI_EVPN:
1668 return BGP_AF_L2VPN_EVPN;
1669 break;
1670 default:
1671 return BGP_AF_MAX;
1672 break;
1673 }
1674 default:
1675 return BGP_AF_MAX;
1676 break;
1677 }
1678 }
1679
1680 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1681 static inline int peer_group_active(struct peer *peer)
1682 {
1683 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1684 return 1;
1685 return 0;
1686 }
1687
1688 /* If peer is negotiated at least one address family return 1. */
1689 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1690 {
1691 if (peer->afc_nego[afi][SAFI_UNICAST]
1692 || peer->afc_nego[afi][SAFI_MULTICAST]
1693 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1694 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1695 || peer->afc_nego[afi][SAFI_ENCAP]
1696 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1697 || peer->afc_nego[afi][SAFI_EVPN])
1698 return 1;
1699 return 0;
1700 }
1701
1702 /* If at least one address family activated for group, return 1. */
1703 static inline int peer_group_af_configured(struct peer_group *group)
1704 {
1705 struct peer *peer = group->conf;
1706
1707 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1708 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1709 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1710 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1711 || peer->afc[AFI_IP6][SAFI_UNICAST]
1712 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1713 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1714 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1715 || peer->afc[AFI_IP6][SAFI_ENCAP]
1716 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1717 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1718 return 1;
1719 return 0;
1720 }
1721
1722 static inline char *timestamp_string(time_t ts)
1723 {
1724 time_t tbuf;
1725 tbuf = time(NULL) - (bgp_clock() - ts);
1726 return ctime(&tbuf);
1727 }
1728
1729 static inline int peer_established(struct peer *peer)
1730 {
1731 if (peer->status == Established)
1732 return 1;
1733 return 0;
1734 }
1735
1736 static inline int peer_dynamic_neighbor(struct peer *peer)
1737 {
1738 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1739 }
1740
1741 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1742 {
1743 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1744 }
1745
1746 /* Lookup VRF for BGP instance based on its type. */
1747 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1748 {
1749 struct vrf *vrf;
1750
1751 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1752 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1753 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1754 vrf = vrf_lookup_by_name(bgp->name);
1755 else
1756 vrf = NULL;
1757
1758 return vrf;
1759 }
1760
1761 /* Link BGP instance to VRF. */
1762 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1763 {
1764 bgp->vrf_id = vrf->vrf_id;
1765 if (vrf->info != (void *)bgp)
1766 vrf->info = (void *)bgp_lock(bgp);
1767 }
1768
1769 /* Unlink BGP instance from VRF. */
1770 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1771 {
1772 if (vrf->info == (void *)bgp) {
1773 vrf->info = NULL;
1774 bgp_unlock(bgp);
1775 }
1776 bgp->vrf_id = VRF_UNKNOWN;
1777 }
1778
1779 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1780
1781 /* For benefit of rfapi */
1782 extern struct peer *peer_new(struct bgp *bgp);
1783
1784 #endif /* _QUAGGA_BGPD_H */
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