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Merge pull request #3659 from nitinsoniism/route_map_type_5_filter
[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 "frr_pthread.h"
28 #include "lib/json.h"
29 #include "vrf.h"
30 #include "vty.h"
31
32 /* For union sockunion. */
33 #include "queue.h"
34 #include "sockunion.h"
35 #include "routemap.h"
36 #include "linklist.h"
37 #include "defaults.h"
38 #include "bgp_memory.h"
39 #include "bitfield.h"
40 #include "vxlan.h"
41 #include "bgp_labelpool.h"
42 #include "bgp_addpath_types.h"
43
44 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
45 #define BGP_PEER_MAX_HASH_SIZE 16384
46
47 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
48 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
49
50 struct update_subgroup;
51 struct bpacket;
52 struct bgp_pbr_config;
53
54 /*
55 * Allow the neighbor XXXX remote-as to take internal or external
56 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
57 * behavior
58 * in the system.
59 */
60 enum { AS_UNSPECIFIED = 0,
61 AS_SPECIFIED,
62 AS_INTERNAL,
63 AS_EXTERNAL,
64 };
65
66 /* Typedef BGP specific types. */
67 typedef uint32_t as_t;
68 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
69 typedef uint16_t bgp_size_t;
70
71 #define max(a, b) \
72 ({ \
73 __typeof__(a) _a = (a); \
74 __typeof__(b) _b = (b); \
75 _a > _b ? _a : _b; \
76 })
77
78 enum bgp_af_index {
79 BGP_AF_START,
80 BGP_AF_IPV4_UNICAST = BGP_AF_START,
81 BGP_AF_IPV4_MULTICAST,
82 BGP_AF_IPV4_VPN,
83 BGP_AF_IPV6_UNICAST,
84 BGP_AF_IPV6_MULTICAST,
85 BGP_AF_IPV6_VPN,
86 BGP_AF_IPV4_ENCAP,
87 BGP_AF_IPV6_ENCAP,
88 BGP_AF_L2VPN_EVPN,
89 BGP_AF_IPV4_LBL_UNICAST,
90 BGP_AF_IPV6_LBL_UNICAST,
91 BGP_AF_IPV4_FLOWSPEC,
92 BGP_AF_IPV6_FLOWSPEC,
93 BGP_AF_MAX
94 };
95
96 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
97
98 #define FOREACH_AFI_SAFI(afi, safi) \
99 for (afi = AFI_IP; afi < AFI_MAX; afi++) \
100 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
101
102 extern struct frr_pthread *bgp_pth_io;
103 extern struct frr_pthread *bgp_pth_ka;
104
105 /* BGP master for system wide configurations and variables. */
106 struct bgp_master {
107 /* BGP instance list. */
108 struct list *bgp;
109
110 /* BGP thread master. */
111 struct thread_master *master;
112
113 /* work queues */
114 struct work_queue *process_main_queue;
115
116 /* Listening sockets */
117 struct list *listen_sockets;
118
119 /* BGP port number. */
120 uint16_t port;
121
122 /* Listener address */
123 char *address;
124
125 /* The Mac table */
126 struct hash *self_mac_hash;
127
128 /* BGP start time. */
129 time_t start_time;
130
131 /* Various BGP global configuration. */
132 uint8_t options;
133 #define BGP_OPT_NO_FIB (1 << 0)
134 #define BGP_OPT_MULTIPLE_INSTANCE (1 << 1)
135 #define BGP_OPT_CONFIG_CISCO (1 << 2)
136 #define BGP_OPT_NO_LISTEN (1 << 3)
137 #define BGP_OPT_NO_ZEBRA (1 << 4)
138
139 uint64_t updgrp_idspace;
140 uint64_t subgrp_idspace;
141
142 /* timer to dampen route map changes */
143 struct thread *t_rmap_update; /* Handle route map updates */
144 uint32_t rmap_update_timer; /* Route map update timer */
145 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
146
147 /* Id space for automatic RD derivation for an EVI/VRF */
148 bitfield_t rd_idspace;
149
150 /* dynamic mpls label allocation pool */
151 struct labelpool labelpool;
152
153 bool terminating; /* global flag that sigint terminate seen */
154 QOBJ_FIELDS
155 };
156 DECLARE_QOBJ_TYPE(bgp_master)
157
158 /* BGP route-map structure. */
159 struct bgp_rmap {
160 char *name;
161 struct route_map *map;
162 };
163
164 struct bgp_redist {
165 unsigned short instance;
166
167 /* BGP redistribute metric configuration. */
168 uint8_t redist_metric_flag;
169 uint32_t redist_metric;
170
171 /* BGP redistribute route-map. */
172 struct bgp_rmap rmap;
173 };
174
175 typedef enum {
176 BGP_VPN_POLICY_DIR_FROMVPN = 0,
177 BGP_VPN_POLICY_DIR_TOVPN = 1,
178 BGP_VPN_POLICY_DIR_MAX = 2
179 } vpn_policy_direction_t;
180
181 struct vpn_policy {
182 struct bgp *bgp; /* parent */
183 afi_t afi;
184 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
185 struct ecommunity *import_redirect_rtlist;
186 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
187 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
188
189 /* should be mpls_label_t? */
190 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
191 uint32_t tovpn_zebra_vrf_label_last_sent;
192 struct prefix_rd tovpn_rd;
193 struct prefix tovpn_nexthop; /* unset => set to 0 */
194 uint32_t flags;
195 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
196 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
197 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
198
199 /*
200 * If we are importing another vrf into us keep a list of
201 * vrf names that are being imported into us.
202 */
203 struct list *import_vrf;
204
205 /*
206 * if we are being exported to another vrf keep a list of
207 * vrf names that we are being exported to.
208 */
209 struct list *export_vrf;
210 };
211
212 /*
213 * Type of 'struct bgp'.
214 * - Default: The default instance
215 * - VRF: A specific (non-default) VRF
216 * - View: An instance used for route exchange
217 * The "default" instance is treated separately to simplify the code. Note
218 * that if deployed in a Multi-VRF environment, it may not exist.
219 */
220 enum bgp_instance_type {
221 BGP_INSTANCE_TYPE_DEFAULT,
222 BGP_INSTANCE_TYPE_VRF,
223 BGP_INSTANCE_TYPE_VIEW
224 };
225
226 /* BGP instance structure. */
227 struct bgp {
228 /* AS number of this BGP instance. */
229 as_t as;
230
231 /* Name of this BGP instance. */
232 char *name;
233 char *name_pretty; /* printable "VRF|VIEW name|default" */
234
235 /* Type of instance and VRF id. */
236 enum bgp_instance_type inst_type;
237 vrf_id_t vrf_id;
238
239 /* Reference count to allow peer_delete to finish after bgp_delete */
240 int lock;
241
242 /* Self peer. */
243 struct peer *peer_self;
244
245 /* BGP peer. */
246 struct list *peer;
247 struct hash *peerhash;
248
249 /* BGP peer group. */
250 struct list *group;
251
252 /* The maximum number of BGP dynamic neighbors that can be created */
253 int dynamic_neighbors_limit;
254
255 /* The current number of BGP dynamic neighbors */
256 int dynamic_neighbors_count;
257
258 struct hash *update_groups[BGP_AF_MAX];
259
260 /*
261 * Global statistics for update groups.
262 */
263 struct {
264 uint32_t join_events;
265 uint32_t prune_events;
266 uint32_t merge_events;
267 uint32_t split_events;
268 uint32_t updgrp_switch_events;
269 uint32_t peer_refreshes_combined;
270 uint32_t adj_count;
271 uint32_t merge_checks_triggered;
272
273 uint32_t updgrps_created;
274 uint32_t updgrps_deleted;
275 uint32_t subgrps_created;
276 uint32_t subgrps_deleted;
277 } update_group_stats;
278
279 /* BGP configuration. */
280 uint16_t config;
281 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
282 #define BGP_CONFIG_CONFEDERATION (1 << 1)
283
284 /* BGP router identifier. */
285 struct in_addr router_id;
286 struct in_addr router_id_static;
287 struct in_addr router_id_zebra;
288
289 /* BGP route reflector cluster ID. */
290 struct in_addr cluster_id;
291
292 /* BGP confederation information. */
293 as_t confed_id;
294 as_t *confed_peers;
295 int confed_peers_cnt;
296
297 struct thread
298 *t_startup; /* start-up timer on only once at the beginning */
299
300 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
301 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
302 uint32_t maxmed_onstartup_value; /* Max-med value when active on
303 start-up */
304 struct thread
305 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
306 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
307
308 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
309 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
310 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
311 */
312 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
313
314 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
315 uint32_t maxmed_value; /* Max-med value when its active */
316
317 /* BGP update delay on startup */
318 struct thread *t_update_delay;
319 struct thread *t_establish_wait;
320 uint8_t update_delay_over;
321 uint8_t main_zebra_update_hold;
322 uint8_t main_peers_update_hold;
323 uint16_t v_update_delay;
324 uint16_t v_establish_wait;
325 char update_delay_begin_time[64];
326 char update_delay_end_time[64];
327 char update_delay_zebra_resume_time[64];
328 char update_delay_peers_resume_time[64];
329 uint32_t established;
330 uint32_t restarted_peers;
331 uint32_t implicit_eors;
332 uint32_t explicit_eors;
333 #define BGP_UPDATE_DELAY_DEF 0
334 #define BGP_UPDATE_DELAY_MIN 0
335 #define BGP_UPDATE_DELAY_MAX 3600
336
337 /* BGP flags. */
338 uint32_t flags;
339 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
340 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
341 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
342 #define BGP_FLAG_MED_CONFED (1 << 3)
343 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
344 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
345 #define BGP_FLAG_ENFORCE_FIRST_AS (1 << 6)
346 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
347 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
348 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
349 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
350 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
351 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
352 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
353 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
354 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
355 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
356 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
357 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
358 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
359 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
360 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
361
362 /* BGP Per AF flags */
363 uint16_t af_flags[AFI_MAX][SAFI_MAX];
364 #define BGP_CONFIG_DAMPENING (1 << 0)
365 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
366 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
367 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
368 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
369 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
370 /* import/export between address families */
371 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
372 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
373 /* vrf-route leaking flags */
374 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
375 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
376
377 /* Route table for next-hop lookup cache. */
378 struct bgp_table *nexthop_cache_table[AFI_MAX];
379
380 /* Route table for import-check */
381 struct bgp_table *import_check_table[AFI_MAX];
382
383 struct bgp_table *connected_table[AFI_MAX];
384
385 struct hash *address_hash;
386
387 /* DB for all local tunnel-ips - used mainly for martian checks
388 Currently it only has all VxLan tunnel IPs*/
389 struct hash *tip_hash;
390
391 /* Static route configuration. */
392 struct bgp_table *route[AFI_MAX][SAFI_MAX];
393
394 /* Aggregate address configuration. */
395 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
396
397 /* BGP routing information base. */
398 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
399
400 /* BGP table route-map. */
401 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
402
403 /* BGP redistribute configuration. */
404 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
405
406 /* Allocate MPLS labels */
407 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
408
409 /* Allocate hash entries to store policy routing information
410 * The hash are used to host pbr rules somewhere.
411 * Actually, pbr will only be used by flowspec
412 * those hash elements will have relationship together as
413 * illustrated in below diagram:
414 *
415 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
416 * <----- pbr_match j <--- pbr_match_entry 1..m
417 *
418 * - here in BGP structure, the list of match and actions will
419 * stand for the list of ipset sets, and table_ids in the kernel
420 * - the arrow above between pbr_match and pbr_action indicate
421 * that a backpointer permits match to find the action
422 * - the arrow betwen match_entry and match is a hash list
423 * contained in match, that lists the whole set of entries
424 */
425 struct hash *pbr_match_hash;
426 struct hash *pbr_action_hash;
427
428 /* timer to re-evaluate neighbor default-originate route-maps */
429 struct thread *t_rmap_def_originate_eval;
430 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
431
432 /* BGP distance configuration. */
433 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
434 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
435 uint8_t distance_local[AFI_MAX][SAFI_MAX];
436
437 /* BGP default local-preference. */
438 uint32_t default_local_pref;
439
440 /* BGP default subgroup pkt queue max */
441 uint32_t default_subgroup_pkt_queue_max;
442
443 /* BGP default timer. */
444 uint32_t default_holdtime;
445 uint32_t default_keepalive;
446
447 /* BGP graceful restart */
448 uint32_t restart_time;
449 uint32_t stalepath_time;
450
451 /* Maximum-paths configuration */
452 struct bgp_maxpaths_cfg {
453 uint16_t maxpaths_ebgp;
454 uint16_t maxpaths_ibgp;
455 uint16_t ibgp_flags;
456 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
457 } maxpaths[AFI_MAX][SAFI_MAX];
458
459 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
460 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
461
462 /* Automatic coalesce adjust on/off */
463 bool heuristic_coalesce;
464 /* Actual coalesce time */
465 uint32_t coalesce_time;
466
467 /* Auto-shutdown new peers */
468 bool autoshutdown;
469
470 struct bgp_addpath_bgp_data tx_addpath;
471
472 #if ENABLE_BGP_VNC
473 struct rfapi_cfg *rfapi_cfg;
474 struct rfapi *rfapi;
475 #endif
476
477 /* EVPN related information */
478
479 /* EVI hash table */
480 struct hash *vnihash;
481
482 /* EVPN enable - advertise gateway macip routes */
483 int advertise_gw_macip;
484
485 /* EVPN enable - advertise local VNIs and their MACs etc. */
486 int advertise_all_vni;
487
488 struct bgp_evpn_info *evpn_info;
489
490 /* EVPN - use RFC 8365 to auto-derive RT */
491 int advertise_autort_rfc8365;
492
493 /*
494 * Flooding mechanism for BUM packets for VxLAN-EVPN.
495 */
496 enum vxlan_flood_control vxlan_flood_ctrl;
497
498 /* Hash table of Import RTs to EVIs */
499 struct hash *import_rt_hash;
500
501 /* Hash table of VRF import RTs to VRFs */
502 struct hash *vrf_import_rt_hash;
503
504 /* L3-VNI corresponding to this vrf */
505 vni_t l3vni;
506
507 /* router-mac to be used in mac-ip routes for this vrf */
508 struct ethaddr rmac;
509
510 /* originator ip - to be used as NH for type-5 routes */
511 struct in_addr originator_ip;
512
513 /* vrf flags */
514 uint32_t vrf_flags;
515 #define BGP_VRF_AUTO (1 << 0)
516 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
517 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
518 #define BGP_VRF_RD_CFGD (1 << 3)
519 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
520
521
522 /* unique ID for auto derivation of RD for this vrf */
523 uint16_t vrf_rd_id;
524
525 /* Automatically derived RD for this VRF */
526 struct prefix_rd vrf_prd_auto;
527
528 /* RD for this VRF */
529 struct prefix_rd vrf_prd;
530
531 /* import rt list for the vrf instance */
532 struct list *vrf_import_rtl;
533
534 /* export rt list for the vrf instance */
535 struct list *vrf_export_rtl;
536
537 /* list of corresponding l2vnis (struct bgpevpn) */
538 struct list *l2vnis;
539
540 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
541 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
542
543 struct vpn_policy vpn_policy[AFI_MAX];
544
545 struct bgp_pbr_config *bgp_pbr_cfg;
546
547 /* local esi hash table */
548 struct hash *esihash;
549
550 /* Count of peers in established state */
551 uint32_t established_peers;
552
553 QOBJ_FIELDS
554 };
555 DECLARE_QOBJ_TYPE(bgp)
556
557 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
558
559 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
560 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
561 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
562 && bgp->vrf_id != VRF_UNKNOWN))
563
564 /* BGP peer-group support. */
565 struct peer_group {
566 /* Name of the peer-group. */
567 char *name;
568
569 /* Pointer to BGP. */
570 struct bgp *bgp;
571
572 /* Peer-group client list. */
573 struct list *peer;
574
575 /** Dynamic neighbor listening ranges */
576 struct list *listen_range[AFI_MAX];
577
578 /* Peer-group config */
579 struct peer *conf;
580 };
581
582 /* BGP Notify message format. */
583 struct bgp_notify {
584 uint8_t code;
585 uint8_t subcode;
586 char *data;
587 bgp_size_t length;
588 uint8_t *raw_data;
589 };
590
591 /* Next hop self address. */
592 struct bgp_nexthop {
593 struct interface *ifp;
594 struct in_addr v4;
595 struct in6_addr v6_global;
596 struct in6_addr v6_local;
597 };
598
599 /* BGP addpath values */
600 #define BGP_ADDPATH_RX 1
601 #define BGP_ADDPATH_TX 2
602 #define BGP_ADDPATH_ID_LEN 4
603
604 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
605
606 /* Route map direction */
607 #define RMAP_IN 0
608 #define RMAP_OUT 1
609 #define RMAP_MAX 2
610
611 #include "filter.h"
612
613 /* BGP filter structure. */
614 struct bgp_filter {
615 /* Distribute-list. */
616 struct {
617 char *name;
618 struct access_list *alist;
619 } dlist[FILTER_MAX];
620
621 /* Prefix-list. */
622 struct {
623 char *name;
624 struct prefix_list *plist;
625 } plist[FILTER_MAX];
626
627 /* Filter-list. */
628 struct {
629 char *name;
630 struct as_list *aslist;
631 } aslist[FILTER_MAX];
632
633 /* Route-map. */
634 struct {
635 char *name;
636 struct route_map *map;
637 } map[RMAP_MAX];
638
639 /* Unsuppress-map. */
640 struct {
641 char *name;
642 struct route_map *map;
643 } usmap;
644 };
645
646 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
647 a peer who's AS is part of our Confederation. */
648 typedef enum {
649 BGP_PEER_UNSPECIFIED,
650 BGP_PEER_IBGP,
651 BGP_PEER_EBGP,
652 BGP_PEER_INTERNAL,
653 BGP_PEER_CONFED,
654 } bgp_peer_sort_t;
655
656 /* BGP message header and packet size. */
657 #define BGP_MARKER_SIZE 16
658 #define BGP_HEADER_SIZE 19
659 #define BGP_MAX_PACKET_SIZE 4096
660 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
661
662 /*
663 * Trigger delay for bgp_announce_route().
664 */
665 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
666 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
667
668 struct peer_af {
669 /* back pointer to the peer */
670 struct peer *peer;
671
672 /* which subgroup the peer_af belongs to */
673 struct update_subgroup *subgroup;
674
675 /* for being part of an update subgroup's peer list */
676 LIST_ENTRY(peer_af) subgrp_train;
677
678 /* for being part of a packet's peer list */
679 LIST_ENTRY(peer_af) pkt_train;
680
681 struct bpacket *next_pkt_to_send;
682
683 /*
684 * Trigger timer for bgp_announce_route().
685 */
686 struct thread *t_announce_route;
687
688 afi_t afi;
689 safi_t safi;
690 int afid;
691 };
692
693 /* BGP neighbor structure. */
694 struct peer {
695 /* BGP structure. */
696 struct bgp *bgp;
697
698 /* reference count, primarily to allow bgp_process'ing of route_node's
699 * to be done after a struct peer is deleted.
700 *
701 * named 'lock' for hysterical reasons within Quagga.
702 */
703 int lock;
704
705 /* BGP peer group. */
706 struct peer_group *group;
707 uint64_t version[AFI_MAX][SAFI_MAX];
708
709 /* BGP peer_af structures, per configured AF on this peer */
710 struct peer_af *peer_af_array[BGP_AF_MAX];
711
712 /* Peer's remote AS number. */
713 int as_type;
714 as_t as;
715
716 /* Peer's local AS number. */
717 as_t local_as;
718
719 bgp_peer_sort_t sort;
720
721 /* Peer's Change local AS number. */
722 as_t change_local_as;
723
724 /* Remote router ID. */
725 struct in_addr remote_id;
726
727 /* Local router ID. */
728 struct in_addr local_id;
729
730 /* Packet receive and send buffer. */
731 pthread_mutex_t io_mtx; // guards ibuf, obuf
732 struct stream_fifo *ibuf; // packets waiting to be processed
733 struct stream_fifo *obuf; // packets waiting to be written
734
735 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
736 struct stream *obuf_work; // WiP buffer used to construct packets
737
738 struct stream *curr; // the current packet being parsed
739
740 /* We use a separate stream to encode MP_REACH_NLRI for efficient
741 * NLRI packing. peer->obuf_work stores all the other attributes. The
742 * actual packet is then constructed by concatenating the two.
743 */
744 struct stream *scratch;
745
746 /* the doppelganger peer structure, due to dual TCP conn setup */
747 struct peer *doppelganger;
748
749 /* Status of the peer. */
750 int status;
751 int ostatus;
752
753 /* FSM events, stored for debug purposes.
754 * Note: uchar used for reduced memory usage.
755 */
756 unsigned char cur_event;
757 unsigned char last_event;
758 unsigned char last_major_event;
759
760 /* Peer index, used for dumping TABLE_DUMP_V2 format */
761 uint16_t table_dump_index;
762
763 /* Peer information */
764 int fd; /* File descriptor */
765 int ttl; /* TTL of TCP connection to the peer. */
766 int rtt; /* Estimated round-trip-time from TCP_INFO */
767 int gtsm_hops; /* minimum hopcount to peer */
768 char *desc; /* Description of the peer. */
769 unsigned short port; /* Destination port for peer */
770 char *host; /* Printable address of the peer. */
771 union sockunion su; /* Sockunion address of the peer. */
772 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
773 time_t uptime; /* Last Up/Down time */
774 time_t readtime; /* Last read time */
775 time_t resettime; /* Last reset time */
776
777 char *conf_if; /* neighbor interface config name. */
778 struct interface *ifp; /* corresponding interface */
779 char *ifname; /* bind interface name. */
780 char *update_if;
781 union sockunion *update_source;
782
783 union sockunion *su_local; /* Sockunion of local address. */
784 union sockunion *su_remote; /* Sockunion of remote address. */
785 int shared_network; /* Is this peer shared same network. */
786 struct bgp_nexthop nexthop; /* Nexthop */
787
788 /* Peer address family configuration. */
789 uint8_t afc[AFI_MAX][SAFI_MAX];
790 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
791 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
792 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
793
794 /* Capability flags (reset in bgp_stop) */
795 uint32_t cap;
796 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
797 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
798 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
799 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
800 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
801 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
802 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
803 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
804 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
805 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
806 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
807 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
808 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
809 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
810 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
811 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
812 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
813
814 /* Capability flags (reset in bgp_stop) */
815 uint32_t af_cap[AFI_MAX][SAFI_MAX];
816 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
817 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
818 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
819 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
820 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
821 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
822 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
823 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
824 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
825 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
826 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
827 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
828 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
829 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
830 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
831
832 /* Global configuration flags. */
833 /*
834 * Parallel array to flags that indicates whether each flag originates
835 * from a peer-group or if it is config that is specific to this
836 * individual peer. If a flag is set independent of the peer-group, the
837 * same bit should be set here. If this peer is a peer-group, this
838 * memory region should be all zeros.
839 *
840 * The assumption is that the default state for all flags is unset,
841 * so if a flag is unset, the corresponding override flag is unset too.
842 * However if a flag is set, the corresponding override flag is set.
843 */
844 uint32_t flags_override;
845 /*
846 * Parallel array to flags that indicates whether the default behavior
847 * of *flags_override* should be inverted. If a flag is unset and the
848 * corresponding invert flag is set, the corresponding override flag
849 * would be set. However if a flag is set and the corresponding invert
850 * flag is unset, the corresponding override flag would be unset.
851 *
852 * This can be used for attributes like *send-community*, which are
853 * implicitely enabled and have to be disabled explicitely, compared to
854 * 'normal' attributes like *next-hop-self* which are implicitely set.
855 *
856 * All operations dealing with flags should apply the following boolean
857 * logic to keep the internal flag system in a sane state:
858 *
859 * value=0 invert=0 Inherit flag if member, otherwise unset flag
860 * value=0 invert=1 Unset flag unconditionally
861 * value=1 invert=0 Set flag unconditionally
862 * value=1 invert=1 Inherit flag if member, otherwise set flag
863 *
864 * Contrary to the implementation of *flags_override*, the flag
865 * inversion state can be set either on the peer OR the peer *and* the
866 * peer-group. This was done on purpose, as the inversion state of a
867 * flag can be determined on either the peer or the peer-group.
868 *
869 * Example: Enabling the cisco configuration mode inverts all flags
870 * related to *send-community* unconditionally for both peer-groups and
871 * peers.
872 *
873 * This behavior is different for interface peers though, which enable
874 * the *extended-nexthop* flag by default, which regular peers do not.
875 * As the peer-group can contain both regular and interface peers, the
876 * flag inversion state must be set on the peer only.
877 *
878 * When a peer inherits the configuration from a peer-group and the
879 * inversion state of the flag differs between peer and peer-group, the
880 * newly set value must equal to the inverted state of the peer-group.
881 */
882 uint32_t flags_invert;
883 /*
884 * Effective array for storing the peer/peer-group flags. In case of a
885 * peer-group, the peer-specific overrides (see flags_override and
886 * flags_invert) must be respected.
887 */
888 uint32_t flags;
889 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
890 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
891 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
892 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
893 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
894 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
895 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
896 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
897 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
898 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
899 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
900 #define PEER_FLAG_LONESOUL (1 << 11)
901 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
902 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
903 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
904 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
905 #define PEER_FLAG_ENFORCE_FIRST_AS (1 << 16) /* enforce-first-as */
906 #define PEER_FLAG_ROUTEADV (1 << 17) /* route advertise */
907 #define PEER_FLAG_TIMER (1 << 18) /* keepalive & holdtime */
908 #define PEER_FLAG_TIMER_CONNECT (1 << 19) /* connect timer */
909 #define PEER_FLAG_PASSWORD (1 << 20) /* password */
910 #define PEER_FLAG_LOCAL_AS (1 << 21) /* local-as */
911 #define PEER_FLAG_UPDATE_SOURCE (1 << 22) /* update-source */
912
913 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
914 char *tx_shutdown_message;
915
916 /* NSF mode (graceful restart) */
917 uint8_t nsf[AFI_MAX][SAFI_MAX];
918
919 /* Peer Per AF flags */
920 /*
921 * Please consult the comments for *flags_override*, *flags_invert* and
922 * *flags* to understand what these three arrays do. The address-family
923 * specific attributes are being treated the exact same way as global
924 * peer attributes.
925 */
926 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
927 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
928 uint32_t af_flags[AFI_MAX][SAFI_MAX];
929 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
930 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
931 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
932 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
933 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
934 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
935 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
936 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
937 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
938 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
939 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
940 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
941 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
942 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
943 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
944 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
945 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
946 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
947 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
948 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
949 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
950 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
951 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
952 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
953 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
954
955 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
956
957 /* MD5 password */
958 char *password;
959
960 /* default-originate route-map. */
961 struct {
962 char *name;
963 struct route_map *map;
964 } default_rmap[AFI_MAX][SAFI_MAX];
965
966 /* Peer status flags. */
967 uint16_t sflags;
968 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
969 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
970 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
971 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
972 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
973 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
974 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
975
976 /* Peer status af flags (reset in bgp_stop) */
977 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
978 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
979 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
980 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
981 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
982 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
983 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
984
985 /* Configured timer values. */
986 _Atomic uint32_t holdtime;
987 _Atomic uint32_t keepalive;
988 _Atomic uint32_t connect;
989 _Atomic uint32_t routeadv;
990
991 /* Timer values. */
992 _Atomic uint32_t v_start;
993 _Atomic uint32_t v_connect;
994 _Atomic uint32_t v_holdtime;
995 _Atomic uint32_t v_keepalive;
996 _Atomic uint32_t v_routeadv;
997 _Atomic uint32_t v_pmax_restart;
998 _Atomic uint32_t v_gr_restart;
999
1000 /* Threads. */
1001 struct thread *t_read;
1002 struct thread *t_write;
1003 struct thread *t_start;
1004 struct thread *t_connect_check_r;
1005 struct thread *t_connect_check_w;
1006 struct thread *t_connect;
1007 struct thread *t_holdtime;
1008 struct thread *t_routeadv;
1009 struct thread *t_pmax_restart;
1010 struct thread *t_gr_restart;
1011 struct thread *t_gr_stale;
1012 struct thread *t_generate_updgrp_packets;
1013 struct thread *t_process_packet;
1014
1015 /* Thread flags. */
1016 _Atomic uint32_t thread_flags;
1017 #define PEER_THREAD_WRITES_ON (1 << 0)
1018 #define PEER_THREAD_READS_ON (1 << 1)
1019 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
1020 /* workqueues */
1021 struct work_queue *clear_node_queue;
1022
1023 #define PEER_TOTAL_RX(peer) \
1024 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1025 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1026 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1027 + atomic_load_explicit(&peer->refresh_in, \
1028 memory_order_relaxed) \
1029 + atomic_load_explicit(&peer->keepalive_in, \
1030 memory_order_relaxed) \
1031 + atomic_load_explicit(&peer->dynamic_cap_in, \
1032 memory_order_relaxed)
1033
1034 #define PEER_TOTAL_TX(peer) \
1035 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1036 + atomic_load_explicit(&peer->update_out, \
1037 memory_order_relaxed) \
1038 + atomic_load_explicit(&peer->notify_out, \
1039 memory_order_relaxed) \
1040 + atomic_load_explicit(&peer->refresh_out, \
1041 memory_order_relaxed) \
1042 + atomic_load_explicit(&peer->keepalive_out, \
1043 memory_order_relaxed) \
1044 + atomic_load_explicit(&peer->dynamic_cap_out, \
1045 memory_order_relaxed)
1046
1047 /* Statistics field */
1048 _Atomic uint32_t open_in; /* Open message input count */
1049 _Atomic uint32_t open_out; /* Open message output count */
1050 _Atomic uint32_t update_in; /* Update message input count */
1051 _Atomic uint32_t update_out; /* Update message ouput count */
1052 _Atomic time_t update_time; /* Update message received time. */
1053 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1054 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1055 _Atomic uint32_t notify_in; /* Notify input count */
1056 _Atomic uint32_t notify_out; /* Notify output count */
1057 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1058 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1059 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1060 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1061
1062 /* BGP state count */
1063 uint32_t established; /* Established */
1064 uint32_t dropped; /* Dropped */
1065
1066 /* Update delay related fields */
1067 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1068 for EOR */
1069
1070 /* Syncronization list and time. */
1071 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1072 time_t synctime;
1073 /* timestamp when the last UPDATE msg was written */
1074 _Atomic time_t last_write;
1075 /* timestamp when the last msg was written */
1076 _Atomic time_t last_update;
1077
1078 /* Send prefix count. */
1079 unsigned long scount[AFI_MAX][SAFI_MAX];
1080
1081 /* Notify data. */
1082 struct bgp_notify notify;
1083
1084 /* Filter structure. */
1085 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1086
1087 /*
1088 * Parallel array to filter that indicates whether each filter
1089 * originates from a peer-group or if it is config that is specific to
1090 * this individual peer. If a filter is set independent of the
1091 * peer-group the appropriate bit should be set here. If this peer is a
1092 * peer-group, this memory region should be all zeros. The assumption
1093 * is that the default state for all flags is unset. Due to filters
1094 * having a direction (e.g. in/out/...), this array has a third
1095 * dimension for storing the overrides independently per direction.
1096 *
1097 * Notes:
1098 * - if a filter for an individual peer is unset, the corresponding
1099 * override flag is unset and the peer is considered to be back in
1100 * sync with the peer-group.
1101 * - This does *not* contain the filter values, rather it contains
1102 * whether the filter in filter (struct bgp_filter) is peer-specific.
1103 */
1104 uint8_t filter_override[AFI_MAX][SAFI_MAX][(FILTER_MAX > RMAP_MAX)
1105 ? FILTER_MAX
1106 : RMAP_MAX];
1107 #define PEER_FT_DISTRIBUTE_LIST (1 << 0) /* distribute-list */
1108 #define PEER_FT_FILTER_LIST (1 << 1) /* filter-list */
1109 #define PEER_FT_PREFIX_LIST (1 << 2) /* prefix-list */
1110 #define PEER_FT_ROUTE_MAP (1 << 3) /* route-map */
1111 #define PEER_FT_UNSUPPRESS_MAP (1 << 4) /* unsuppress-map */
1112
1113 /* ORF Prefix-list */
1114 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1115
1116 /* Text description of last attribute rcvd */
1117 char rcvd_attr_str[BUFSIZ];
1118
1119 /* Track if we printed the attribute in debugs */
1120 int rcvd_attr_printed;
1121
1122 /* Prefix count. */
1123 unsigned long pcount[AFI_MAX][SAFI_MAX];
1124
1125 /* Max prefix count. */
1126 unsigned long pmax[AFI_MAX][SAFI_MAX];
1127 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1128 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1129 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1130
1131 /* allowas-in. */
1132 char allowas_in[AFI_MAX][SAFI_MAX];
1133
1134 /* weight */
1135 unsigned long weight[AFI_MAX][SAFI_MAX];
1136
1137 /* peer reset cause */
1138 char last_reset;
1139 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1140 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1141 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1142 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1143 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1144 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1145 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1146 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1147 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1148 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1149 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1150 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1151 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1152 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1153 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1154 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1155 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1156 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1157 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1158 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1159 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1160 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1161 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1162 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1163 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1164 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1165 unsigned long last_reset_cause_size;
1166 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1167
1168 /* The kind of route-map Flags.*/
1169 uint8_t rmap_type;
1170 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1171 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1172 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1173 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1174 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1175 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1176 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1177 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1178
1179 /* peer specific BFD information */
1180 struct bfd_info *bfd_info;
1181
1182 /* hostname and domainname advertised by host */
1183 char *hostname;
1184 char *domainname;
1185
1186 QOBJ_FIELDS
1187 };
1188 DECLARE_QOBJ_TYPE(peer)
1189
1190 /* Inherit peer attribute from peer-group. */
1191 #define PEER_ATTR_INHERIT(peer, group, attr) \
1192 ((peer)->attr = (group)->conf->attr)
1193 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1194 do { \
1195 if ((peer)->attr) \
1196 XFREE(mt, (peer)->attr); \
1197 if ((group)->conf->attr) \
1198 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1199 else \
1200 (peer)->attr = NULL; \
1201 } while (0)
1202 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1203 do { \
1204 if ((peer)->attr) \
1205 sockunion_free((peer)->attr); \
1206 if ((group)->conf->attr) \
1207 (peer)->attr = sockunion_dup((group)->conf->attr); \
1208 else \
1209 (peer)->attr = NULL; \
1210 } while (0)
1211
1212 /* Check if suppress start/restart of sessions to peer. */
1213 #define BGP_PEER_START_SUPPRESSED(P) \
1214 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1215 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1216
1217 #define PEER_PASSWORD_MINLEN (1)
1218 #define PEER_PASSWORD_MAXLEN (80)
1219
1220 /* This structure's member directly points incoming packet data
1221 stream. */
1222 struct bgp_nlri {
1223 /* AFI. */
1224 uint16_t afi; /* iana_afi_t */
1225
1226 /* SAFI. */
1227 uint8_t safi; /* iana_safi_t */
1228
1229 /* Pointer to NLRI byte stream. */
1230 uint8_t *nlri;
1231
1232 /* Length of whole NLRI. */
1233 bgp_size_t length;
1234 };
1235
1236 /* BGP versions. */
1237 #define BGP_VERSION_4 4
1238
1239 /* Default BGP port number. */
1240 #define BGP_PORT_DEFAULT 179
1241
1242 /* BGP minimum message size. */
1243 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1244 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1245 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1246 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1247 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1248 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1249
1250 /* BGP message types. */
1251 #define BGP_MSG_OPEN 1
1252 #define BGP_MSG_UPDATE 2
1253 #define BGP_MSG_NOTIFY 3
1254 #define BGP_MSG_KEEPALIVE 4
1255 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1256 #define BGP_MSG_CAPABILITY 6
1257 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1258
1259 /* BGP open optional parameter. */
1260 #define BGP_OPEN_OPT_AUTH 1
1261 #define BGP_OPEN_OPT_CAP 2
1262
1263 /* BGP4 attribute type codes. */
1264 #define BGP_ATTR_ORIGIN 1
1265 #define BGP_ATTR_AS_PATH 2
1266 #define BGP_ATTR_NEXT_HOP 3
1267 #define BGP_ATTR_MULTI_EXIT_DISC 4
1268 #define BGP_ATTR_LOCAL_PREF 5
1269 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1270 #define BGP_ATTR_AGGREGATOR 7
1271 #define BGP_ATTR_COMMUNITIES 8
1272 #define BGP_ATTR_ORIGINATOR_ID 9
1273 #define BGP_ATTR_CLUSTER_LIST 10
1274 #define BGP_ATTR_DPA 11
1275 #define BGP_ATTR_ADVERTISER 12
1276 #define BGP_ATTR_RCID_PATH 13
1277 #define BGP_ATTR_MP_REACH_NLRI 14
1278 #define BGP_ATTR_MP_UNREACH_NLRI 15
1279 #define BGP_ATTR_EXT_COMMUNITIES 16
1280 #define BGP_ATTR_AS4_PATH 17
1281 #define BGP_ATTR_AS4_AGGREGATOR 18
1282 #define BGP_ATTR_AS_PATHLIMIT 21
1283 #define BGP_ATTR_PMSI_TUNNEL 22
1284 #define BGP_ATTR_ENCAP 23
1285 #define BGP_ATTR_LARGE_COMMUNITIES 32
1286 #define BGP_ATTR_PREFIX_SID 40
1287 #if ENABLE_BGP_VNC_ATTR
1288 #define BGP_ATTR_VNC 255
1289 #endif
1290
1291 /* BGP update origin. */
1292 #define BGP_ORIGIN_IGP 0
1293 #define BGP_ORIGIN_EGP 1
1294 #define BGP_ORIGIN_INCOMPLETE 2
1295
1296 /* BGP notify message codes. */
1297 #define BGP_NOTIFY_HEADER_ERR 1
1298 #define BGP_NOTIFY_OPEN_ERR 2
1299 #define BGP_NOTIFY_UPDATE_ERR 3
1300 #define BGP_NOTIFY_HOLD_ERR 4
1301 #define BGP_NOTIFY_FSM_ERR 5
1302 #define BGP_NOTIFY_CEASE 6
1303 #define BGP_NOTIFY_CAPABILITY_ERR 7
1304
1305 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1306
1307 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1308 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1309 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1310 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1311
1312 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1313 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1314 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1315 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1316 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1317 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1318 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1319 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1320 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1321
1322 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1323 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1324 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1325 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1326 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1327 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1328 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1329 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1330 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1331 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1332 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1333 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1334
1335 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1336 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1337 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1338 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1339 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1340 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1341 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1342 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1343 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1344
1345 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1346 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1347 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1348 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1349
1350 /* BGP finite state machine status. */
1351 #define Idle 1
1352 #define Connect 2
1353 #define Active 3
1354 #define OpenSent 4
1355 #define OpenConfirm 5
1356 #define Established 6
1357 #define Clearing 7
1358 #define Deleted 8
1359 #define BGP_STATUS_MAX 9
1360
1361 /* BGP finite state machine events. */
1362 #define BGP_Start 1
1363 #define BGP_Stop 2
1364 #define TCP_connection_open 3
1365 #define TCP_connection_closed 4
1366 #define TCP_connection_open_failed 5
1367 #define TCP_fatal_error 6
1368 #define ConnectRetry_timer_expired 7
1369 #define Hold_Timer_expired 8
1370 #define KeepAlive_timer_expired 9
1371 #define Receive_OPEN_message 10
1372 #define Receive_KEEPALIVE_message 11
1373 #define Receive_UPDATE_message 12
1374 #define Receive_NOTIFICATION_message 13
1375 #define Clearing_Completed 14
1376 #define BGP_EVENTS_MAX 15
1377
1378 /* BGP timers default value. */
1379 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1380 #define BGP_INIT_START_TIMER 1
1381 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1382 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1383 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1384 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1385 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1386
1387 /* BGP default local preference. */
1388 #define BGP_DEFAULT_LOCAL_PREF 100
1389
1390 /* BGP local-preference to send when 'bgp graceful-shutdown'
1391 * is configured */
1392 #define BGP_GSHUT_LOCAL_PREF 0
1393
1394 /* BGP default subgroup packet queue max . */
1395 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1396
1397 /* BGP graceful restart */
1398 #define BGP_DEFAULT_RESTART_TIME 120
1399 #define BGP_DEFAULT_STALEPATH_TIME 360
1400
1401 /* BGP uptime string length. */
1402 #define BGP_UPTIME_LEN 25
1403
1404 /* Default configuration settings for bgpd. */
1405 #define BGP_VTY_PORT 2605
1406 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1407
1408 /* Check AS path loop when we send NLRI. */
1409 /* #define BGP_SEND_ASPATH_CHECK */
1410
1411 /* BGP Dynamic Neighbors feature */
1412 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1413 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1414 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1415
1416 /* Flag for peer_clear_soft(). */
1417 enum bgp_clear_type {
1418 BGP_CLEAR_SOFT_NONE,
1419 BGP_CLEAR_SOFT_OUT,
1420 BGP_CLEAR_SOFT_IN,
1421 BGP_CLEAR_SOFT_BOTH,
1422 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1423 };
1424
1425 /* Macros. */
1426 #define BGP_INPUT(P) ((P)->curr)
1427 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1428 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1429 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1430
1431 /* BGP error codes. */
1432 #define BGP_SUCCESS 0
1433 #define BGP_ERR_INVALID_VALUE -1
1434 #define BGP_ERR_INVALID_FLAG -2
1435 #define BGP_ERR_INVALID_AS -3
1436 #define BGP_ERR_INVALID_BGP -4
1437 #define BGP_ERR_PEER_GROUP_MEMBER -5
1438 #define BGP_ERR_MULTIPLE_INSTANCE_USED -6
1439 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1440 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1441 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1442 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1443 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET -11
1444 #define BGP_ERR_AS_MISMATCH -12
1445 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1446 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1447 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1448 #define BGP_ERR_NOT_INTERNAL_PEER -16
1449 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1450 #define BGP_ERR_AF_UNCONFIGURED -18
1451 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1452 #define BGP_ERR_INSTANCE_MISMATCH -20
1453 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1454 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1455 #define BGP_ERR_TCPSIG_FAILED -23
1456 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1457 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1458 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1459 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1460 #define BGP_ERR_AS_OVERRIDE -28
1461 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1462 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1463 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1464 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1465 #define BGP_ERR_MAX -33
1466 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1467 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1468
1469 /*
1470 * Enumeration of different policy kinds a peer can be configured with.
1471 */
1472 typedef enum {
1473 BGP_POLICY_ROUTE_MAP,
1474 BGP_POLICY_FILTER_LIST,
1475 BGP_POLICY_PREFIX_LIST,
1476 BGP_POLICY_DISTRIBUTE_LIST,
1477 } bgp_policy_type_e;
1478
1479 /* peer_flag_change_type. */
1480 enum peer_change_type {
1481 peer_change_none,
1482 peer_change_reset,
1483 peer_change_reset_in,
1484 peer_change_reset_out,
1485 };
1486
1487 extern struct bgp_master *bm;
1488 extern unsigned int multipath_num;
1489
1490 /* Prototypes. */
1491 extern void bgp_terminate(void);
1492 extern void bgp_reset(void);
1493 extern time_t bgp_clock(void);
1494 extern void bgp_zclient_reset(void);
1495 extern struct bgp *bgp_get_default(void);
1496 extern struct bgp *bgp_lookup(as_t, const char *);
1497 extern struct bgp *bgp_lookup_by_name(const char *);
1498 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1499 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1500 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1501 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1502 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1503 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1504 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1505 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1506 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1507 union sockunion *,
1508 struct peer_group *);
1509 extern struct prefix *
1510 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1511 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1512 struct prefix *,
1513 struct prefix **);
1514 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1515 union sockunion *);
1516
1517 /*
1518 * Peers are incredibly easy to memory leak
1519 * due to the various ways that they are actually used
1520 * Provide some functionality to debug locks and unlocks
1521 */
1522 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1523 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1524 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1525 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1526
1527 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1528 extern int peer_active(struct peer *);
1529 extern int peer_active_nego(struct peer *);
1530 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1531 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1532 as_t, as_t, int, afi_t, safi_t,
1533 struct peer_group *);
1534 extern struct peer *peer_create_accept(struct bgp *);
1535 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1536 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1537 json_object *json);
1538
1539 extern int bgp_config_write(struct vty *);
1540
1541 extern void bgp_master_init(struct thread_master *master);
1542
1543 extern void bgp_init(unsigned short instance);
1544 extern void bgp_pthreads_run(void);
1545 extern void bgp_pthreads_finish(void);
1546 extern void bgp_route_map_init(void);
1547 extern void bgp_session_reset(struct peer *);
1548
1549 extern int bgp_option_set(int);
1550 extern int bgp_option_unset(int);
1551 extern int bgp_option_check(int);
1552
1553 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1554 extern void bgp_instance_up(struct bgp *);
1555 extern void bgp_instance_down(struct bgp *);
1556 extern int bgp_delete(struct bgp *);
1557
1558 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1559 vrf_id_t old_vrf_id, bool create);
1560
1561 extern int bgp_flag_set(struct bgp *, int);
1562 extern int bgp_flag_unset(struct bgp *, int);
1563 extern int bgp_flag_check(struct bgp *, int);
1564
1565 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1566 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1567
1568 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1569 extern int bgp_cluster_id_unset(struct bgp *);
1570
1571 extern int bgp_confederation_id_set(struct bgp *, as_t);
1572 extern int bgp_confederation_id_unset(struct bgp *);
1573 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1574
1575 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1576 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1577
1578 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1579 extern int bgp_timers_unset(struct bgp *);
1580
1581 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1582 extern int bgp_default_local_preference_unset(struct bgp *);
1583
1584 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1585 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1586
1587 extern int bgp_listen_limit_set(struct bgp *, int);
1588 extern int bgp_listen_limit_unset(struct bgp *);
1589
1590 extern int bgp_update_delay_active(struct bgp *);
1591 extern int bgp_update_delay_configured(struct bgp *);
1592 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1593 extern void peer_as_change(struct peer *, as_t, int);
1594 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1595 int, afi_t, safi_t);
1596 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1597 extern int peer_delete(struct peer *peer);
1598 extern int peer_group_delete(struct peer_group *);
1599 extern int peer_group_remote_as_delete(struct peer_group *);
1600 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1601
1602 extern int peer_activate(struct peer *, afi_t, safi_t);
1603 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1604 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1605
1606 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1607 struct peer_group *, as_t *);
1608
1609 extern int peer_flag_set(struct peer *, uint32_t);
1610 extern int peer_flag_unset(struct peer *, uint32_t);
1611 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1612
1613 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1614 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1615 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1616 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1617 uint32_t flag);
1618 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1619 enum peer_change_type type);
1620
1621 extern int peer_ebgp_multihop_set(struct peer *, int);
1622 extern int peer_ebgp_multihop_unset(struct peer *);
1623 extern int is_ebgp_multihop_configured(struct peer *peer);
1624
1625 extern int peer_description_set(struct peer *, const char *);
1626 extern int peer_description_unset(struct peer *);
1627
1628 extern int peer_update_source_if_set(struct peer *, const char *);
1629 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1630 extern int peer_update_source_unset(struct peer *);
1631
1632 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1633 const char *rmap,
1634 struct route_map *route_map);
1635 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1636
1637 extern int peer_port_set(struct peer *, uint16_t);
1638 extern int peer_port_unset(struct peer *);
1639
1640 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1641 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1642
1643 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1644 uint32_t holdtime);
1645 extern int peer_timers_unset(struct peer *);
1646
1647 extern int peer_timers_connect_set(struct peer *, uint32_t);
1648 extern int peer_timers_connect_unset(struct peer *);
1649
1650 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1651 extern int peer_advertise_interval_unset(struct peer *);
1652
1653 extern void peer_interface_set(struct peer *, const char *);
1654 extern void peer_interface_unset(struct peer *);
1655
1656 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1657 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1658
1659 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1660 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1661
1662 extern int peer_local_as_set(struct peer *, as_t, int, int);
1663 extern int peer_local_as_unset(struct peer *);
1664
1665 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1666 const char *);
1667 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1668
1669 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1670 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1671
1672 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1673 const char *name, struct route_map *route_map);
1674 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1675
1676 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1677 const char *name,
1678 struct route_map *route_map);
1679
1680 extern int peer_password_set(struct peer *, const char *);
1681 extern int peer_password_unset(struct peer *);
1682
1683 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1684
1685 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1686 uint8_t, int, uint16_t);
1687 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1688
1689 extern int peer_clear(struct peer *, struct listnode **);
1690 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1691
1692 extern int peer_ttl_security_hops_set(struct peer *, int);
1693 extern int peer_ttl_security_hops_unset(struct peer *);
1694
1695 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1696 extern int peer_tx_shutdown_message_unset(struct peer *);
1697
1698 extern int bgp_route_map_update_timer(struct thread *thread);
1699 extern void bgp_route_map_terminate(void);
1700
1701 extern int peer_cmp(struct peer *p1, struct peer *p2);
1702
1703 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1704 afi_t *afi, safi_t *safi);
1705 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1706 iana_afi_t *pkt_afi,
1707 iana_safi_t *pkt_safi);
1708
1709 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1710 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1711 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1712
1713 extern void bgp_close(void);
1714 extern void bgp_free(struct bgp *);
1715
1716 static inline struct bgp *bgp_lock(struct bgp *bgp)
1717 {
1718 bgp->lock++;
1719 return bgp;
1720 }
1721
1722 static inline void bgp_unlock(struct bgp *bgp)
1723 {
1724 assert(bgp->lock > 0);
1725 if (--bgp->lock == 0)
1726 bgp_free(bgp);
1727 }
1728
1729 static inline int afindex(afi_t afi, safi_t safi)
1730 {
1731 switch (afi) {
1732 case AFI_IP:
1733 switch (safi) {
1734 case SAFI_UNICAST:
1735 return BGP_AF_IPV4_UNICAST;
1736 break;
1737 case SAFI_MULTICAST:
1738 return BGP_AF_IPV4_MULTICAST;
1739 break;
1740 case SAFI_LABELED_UNICAST:
1741 return BGP_AF_IPV4_LBL_UNICAST;
1742 break;
1743 case SAFI_MPLS_VPN:
1744 return BGP_AF_IPV4_VPN;
1745 break;
1746 case SAFI_ENCAP:
1747 return BGP_AF_IPV4_ENCAP;
1748 break;
1749 case SAFI_FLOWSPEC:
1750 return BGP_AF_IPV4_FLOWSPEC;
1751 default:
1752 return BGP_AF_MAX;
1753 break;
1754 }
1755 break;
1756 case AFI_IP6:
1757 switch (safi) {
1758 case SAFI_UNICAST:
1759 return BGP_AF_IPV6_UNICAST;
1760 break;
1761 case SAFI_MULTICAST:
1762 return BGP_AF_IPV6_MULTICAST;
1763 break;
1764 case SAFI_LABELED_UNICAST:
1765 return BGP_AF_IPV6_LBL_UNICAST;
1766 break;
1767 case SAFI_MPLS_VPN:
1768 return BGP_AF_IPV6_VPN;
1769 break;
1770 case SAFI_ENCAP:
1771 return BGP_AF_IPV6_ENCAP;
1772 break;
1773 case SAFI_FLOWSPEC:
1774 return BGP_AF_IPV6_FLOWSPEC;
1775 default:
1776 return BGP_AF_MAX;
1777 break;
1778 }
1779 break;
1780 case AFI_L2VPN:
1781 switch (safi) {
1782 case SAFI_EVPN:
1783 return BGP_AF_L2VPN_EVPN;
1784 break;
1785 default:
1786 return BGP_AF_MAX;
1787 break;
1788 }
1789 default:
1790 return BGP_AF_MAX;
1791 break;
1792 }
1793 }
1794
1795 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1796 static inline int peer_group_active(struct peer *peer)
1797 {
1798 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1799 return 1;
1800 return 0;
1801 }
1802
1803 /* If peer is negotiated at least one address family return 1. */
1804 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1805 {
1806 if (peer->afc_nego[afi][SAFI_UNICAST]
1807 || peer->afc_nego[afi][SAFI_MULTICAST]
1808 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1809 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1810 || peer->afc_nego[afi][SAFI_ENCAP]
1811 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1812 || peer->afc_nego[afi][SAFI_EVPN])
1813 return 1;
1814 return 0;
1815 }
1816
1817 /* If at least one address family activated for group, return 1. */
1818 static inline int peer_group_af_configured(struct peer_group *group)
1819 {
1820 struct peer *peer = group->conf;
1821
1822 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1823 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1824 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1825 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1826 || peer->afc[AFI_IP6][SAFI_UNICAST]
1827 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1828 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1829 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1830 || peer->afc[AFI_IP6][SAFI_ENCAP]
1831 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1832 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1833 return 1;
1834 return 0;
1835 }
1836
1837 static inline char *timestamp_string(time_t ts)
1838 {
1839 time_t tbuf;
1840 tbuf = time(NULL) - (bgp_clock() - ts);
1841 return ctime(&tbuf);
1842 }
1843
1844 static inline int peer_established(struct peer *peer)
1845 {
1846 if (peer->status == Established)
1847 return 1;
1848 return 0;
1849 }
1850
1851 static inline int peer_dynamic_neighbor(struct peer *peer)
1852 {
1853 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1854 }
1855
1856 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1857 {
1858 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1859 }
1860
1861 /* Lookup VRF for BGP instance based on its type. */
1862 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1863 {
1864 struct vrf *vrf;
1865
1866 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1867 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1868 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1869 vrf = vrf_lookup_by_name(bgp->name);
1870 else
1871 vrf = NULL;
1872
1873 return vrf;
1874 }
1875
1876 /* Link BGP instance to VRF. */
1877 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1878 {
1879 bgp->vrf_id = vrf->vrf_id;
1880 if (vrf->info != (void *)bgp)
1881 vrf->info = (void *)bgp_lock(bgp);
1882 }
1883
1884 /* Unlink BGP instance from VRF. */
1885 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1886 {
1887 if (vrf->info == (void *)bgp) {
1888 vrf->info = NULL;
1889 bgp_unlock(bgp);
1890 }
1891 bgp->vrf_id = VRF_UNKNOWN;
1892 }
1893
1894 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1895
1896 /* For benefit of rfapi */
1897 extern struct peer *peer_new(struct bgp *bgp);
1898 #endif /* _QUAGGA_BGPD_H */
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