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Merge pull request #3205 from donaldsharp/default
[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
43 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
44 #define BGP_PEER_MAX_HASH_SIZE 16384
45
46 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
47 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
48
49 struct update_subgroup;
50 struct bpacket;
51 struct bgp_pbr_config;
52
53 /*
54 * Allow the neighbor XXXX remote-as to take internal or external
55 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
56 * behavior
57 * in the system.
58 */
59 enum { AS_UNSPECIFIED = 0,
60 AS_SPECIFIED,
61 AS_INTERNAL,
62 AS_EXTERNAL,
63 };
64
65 /* Typedef BGP specific types. */
66 typedef uint32_t as_t;
67 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
68 typedef uint16_t bgp_size_t;
69
70 #define max(a, b) \
71 ({ \
72 __typeof__(a) _a = (a); \
73 __typeof__(b) _b = (b); \
74 _a > _b ? _a : _b; \
75 })
76
77 enum bgp_af_index {
78 BGP_AF_START,
79 BGP_AF_IPV4_UNICAST = BGP_AF_START,
80 BGP_AF_IPV4_MULTICAST,
81 BGP_AF_IPV4_VPN,
82 BGP_AF_IPV6_UNICAST,
83 BGP_AF_IPV6_MULTICAST,
84 BGP_AF_IPV6_VPN,
85 BGP_AF_IPV4_ENCAP,
86 BGP_AF_IPV6_ENCAP,
87 BGP_AF_L2VPN_EVPN,
88 BGP_AF_IPV4_LBL_UNICAST,
89 BGP_AF_IPV6_LBL_UNICAST,
90 BGP_AF_IPV4_FLOWSPEC,
91 BGP_AF_IPV6_FLOWSPEC,
92 BGP_AF_MAX
93 };
94
95 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
96
97 #define FOREACH_AFI_SAFI(afi, safi) \
98 for (afi = AFI_IP; afi < AFI_MAX; afi++) \
99 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
100
101 extern struct frr_pthread *bgp_pth_io;
102 extern struct frr_pthread *bgp_pth_ka;
103
104 /* BGP master for system wide configurations and variables. */
105 struct bgp_master {
106 /* BGP instance list. */
107 struct list *bgp;
108
109 /* BGP thread master. */
110 struct thread_master *master;
111
112 /* work queues */
113 struct work_queue *process_main_queue;
114
115 /* Listening sockets */
116 struct list *listen_sockets;
117
118 /* BGP port number. */
119 uint16_t port;
120
121 /* Listener address */
122 char *address;
123
124 /* BGP start time. */
125 time_t start_time;
126
127 /* Various BGP global configuration. */
128 uint8_t options;
129 #define BGP_OPT_NO_FIB (1 << 0)
130 #define BGP_OPT_MULTIPLE_INSTANCE (1 << 1)
131 #define BGP_OPT_CONFIG_CISCO (1 << 2)
132 #define BGP_OPT_NO_LISTEN (1 << 3)
133
134 uint64_t updgrp_idspace;
135 uint64_t subgrp_idspace;
136
137 /* timer to dampen route map changes */
138 struct thread *t_rmap_update; /* Handle route map updates */
139 uint32_t rmap_update_timer; /* Route map update timer */
140 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
141
142 /* Id space for automatic RD derivation for an EVI/VRF */
143 bitfield_t rd_idspace;
144
145 /* dynamic mpls label allocation pool */
146 struct labelpool labelpool;
147
148 bool terminating; /* global flag that sigint terminate seen */
149 QOBJ_FIELDS
150 };
151 DECLARE_QOBJ_TYPE(bgp_master)
152
153 /* BGP route-map structure. */
154 struct bgp_rmap {
155 char *name;
156 struct route_map *map;
157 };
158
159 struct bgp_redist {
160 unsigned short instance;
161
162 /* BGP redistribute metric configuration. */
163 uint8_t redist_metric_flag;
164 uint32_t redist_metric;
165
166 /* BGP redistribute route-map. */
167 struct bgp_rmap rmap;
168 };
169
170 typedef enum {
171 BGP_VPN_POLICY_DIR_FROMVPN = 0,
172 BGP_VPN_POLICY_DIR_TOVPN = 1,
173 BGP_VPN_POLICY_DIR_MAX = 2
174 } vpn_policy_direction_t;
175
176 struct vpn_policy {
177 struct bgp *bgp; /* parent */
178 afi_t afi;
179 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
180 struct ecommunity *import_redirect_rtlist;
181 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
182 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
183
184 /* should be mpls_label_t? */
185 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
186 uint32_t tovpn_zebra_vrf_label_last_sent;
187 struct prefix_rd tovpn_rd;
188 struct prefix tovpn_nexthop; /* unset => set to 0 */
189 uint32_t flags;
190 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
191 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
192 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
193
194 /*
195 * If we are importing another vrf into us keep a list of
196 * vrf names that are being imported into us.
197 */
198 struct list *import_vrf;
199
200 /*
201 * if we are being exported to another vrf keep a list of
202 * vrf names that we are being exported to.
203 */
204 struct list *export_vrf;
205 };
206
207 /*
208 * Type of 'struct bgp'.
209 * - Default: The default instance
210 * - VRF: A specific (non-default) VRF
211 * - View: An instance used for route exchange
212 * The "default" instance is treated separately to simplify the code. Note
213 * that if deployed in a Multi-VRF environment, it may not exist.
214 */
215 enum bgp_instance_type {
216 BGP_INSTANCE_TYPE_DEFAULT,
217 BGP_INSTANCE_TYPE_VRF,
218 BGP_INSTANCE_TYPE_VIEW
219 };
220
221 /* BGP instance structure. */
222 struct bgp {
223 /* AS number of this BGP instance. */
224 as_t as;
225
226 /* Name of this BGP instance. */
227 char *name;
228 char *name_pretty; /* printable "VRF|VIEW name|default" */
229
230 /* Type of instance and VRF id. */
231 enum bgp_instance_type inst_type;
232 vrf_id_t vrf_id;
233
234 /* Reference count to allow peer_delete to finish after bgp_delete */
235 int lock;
236
237 /* Self peer. */
238 struct peer *peer_self;
239
240 /* BGP peer. */
241 struct list *peer;
242 struct hash *peerhash;
243
244 /* BGP peer group. */
245 struct list *group;
246
247 /* The maximum number of BGP dynamic neighbors that can be created */
248 int dynamic_neighbors_limit;
249
250 /* The current number of BGP dynamic neighbors */
251 int dynamic_neighbors_count;
252
253 struct hash *update_groups[BGP_AF_MAX];
254
255 /*
256 * Global statistics for update groups.
257 */
258 struct {
259 uint32_t join_events;
260 uint32_t prune_events;
261 uint32_t merge_events;
262 uint32_t split_events;
263 uint32_t updgrp_switch_events;
264 uint32_t peer_refreshes_combined;
265 uint32_t adj_count;
266 uint32_t merge_checks_triggered;
267
268 uint32_t updgrps_created;
269 uint32_t updgrps_deleted;
270 uint32_t subgrps_created;
271 uint32_t subgrps_deleted;
272 } update_group_stats;
273
274 /* BGP configuration. */
275 uint16_t config;
276 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
277 #define BGP_CONFIG_CONFEDERATION (1 << 1)
278
279 /* BGP router identifier. */
280 struct in_addr router_id;
281 struct in_addr router_id_static;
282 struct in_addr router_id_zebra;
283
284 /* BGP route reflector cluster ID. */
285 struct in_addr cluster_id;
286
287 /* BGP confederation information. */
288 as_t confed_id;
289 as_t *confed_peers;
290 int confed_peers_cnt;
291
292 struct thread
293 *t_startup; /* start-up timer on only once at the beginning */
294
295 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
296 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
297 uint32_t maxmed_onstartup_value; /* Max-med value when active on
298 start-up */
299 struct thread
300 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
301 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
302
303 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
304 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
305 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
306 */
307 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
308
309 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
310 uint32_t maxmed_value; /* Max-med value when its active */
311
312 /* BGP update delay on startup */
313 struct thread *t_update_delay;
314 struct thread *t_establish_wait;
315 uint8_t update_delay_over;
316 uint8_t main_zebra_update_hold;
317 uint8_t main_peers_update_hold;
318 uint16_t v_update_delay;
319 uint16_t v_establish_wait;
320 char update_delay_begin_time[64];
321 char update_delay_end_time[64];
322 char update_delay_zebra_resume_time[64];
323 char update_delay_peers_resume_time[64];
324 uint32_t established;
325 uint32_t restarted_peers;
326 uint32_t implicit_eors;
327 uint32_t explicit_eors;
328 #define BGP_UPDATE_DELAY_DEF 0
329 #define BGP_UPDATE_DELAY_MIN 0
330 #define BGP_UPDATE_DELAY_MAX 3600
331
332 /* BGP flags. */
333 uint32_t flags;
334 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
335 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
336 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
337 #define BGP_FLAG_MED_CONFED (1 << 3)
338 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
339 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
340 #define BGP_FLAG_ENFORCE_FIRST_AS (1 << 6)
341 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
342 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
343 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
344 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
345 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
346 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
347 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
348 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
349 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
350 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
351 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
352 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
353 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
354 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
355 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
356
357 /* BGP Per AF flags */
358 uint16_t af_flags[AFI_MAX][SAFI_MAX];
359 #define BGP_CONFIG_DAMPENING (1 << 0)
360 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
361 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
362 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
363 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
364 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
365 /* import/export between address families */
366 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
367 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
368 /* vrf-route leaking flags */
369 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
370 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
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 /*
488 * Flooding mechanism for BUM packets for VxLAN-EVPN.
489 */
490 enum vxlan_flood_control vxlan_flood_ctrl;
491
492 /* Hash table of Import RTs to EVIs */
493 struct hash *import_rt_hash;
494
495 /* Hash table of VRF import RTs to VRFs */
496 struct hash *vrf_import_rt_hash;
497
498 /* L3-VNI corresponding to this vrf */
499 vni_t l3vni;
500
501 /* router-mac to be used in mac-ip routes for this vrf */
502 struct ethaddr rmac;
503
504 /* originator ip - to be used as NH for type-5 routes */
505 struct in_addr originator_ip;
506
507 /* vrf flags */
508 uint32_t vrf_flags;
509 #define BGP_VRF_AUTO (1 << 0)
510 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
511 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
512 #define BGP_VRF_RD_CFGD (1 << 3)
513 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
514
515
516 /* unique ID for auto derivation of RD for this vrf */
517 uint16_t vrf_rd_id;
518
519 /* Automatically derived RD for this VRF */
520 struct prefix_rd vrf_prd_auto;
521
522 /* RD for this VRF */
523 struct prefix_rd vrf_prd;
524
525 /* import rt list for the vrf instance */
526 struct list *vrf_import_rtl;
527
528 /* export rt list for the vrf instance */
529 struct list *vrf_export_rtl;
530
531 /* list of corresponding l2vnis (struct bgpevpn) */
532 struct list *l2vnis;
533
534 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
535 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
536
537 struct vpn_policy vpn_policy[AFI_MAX];
538
539 struct bgp_pbr_config *bgp_pbr_cfg;
540
541 /* local esi hash table */
542 struct hash *esihash;
543
544 QOBJ_FIELDS
545 };
546 DECLARE_QOBJ_TYPE(bgp)
547
548 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
549
550 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
551 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
552 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
553 && bgp->vrf_id != VRF_UNKNOWN))
554
555 /* BGP peer-group support. */
556 struct peer_group {
557 /* Name of the peer-group. */
558 char *name;
559
560 /* Pointer to BGP. */
561 struct bgp *bgp;
562
563 /* Peer-group client list. */
564 struct list *peer;
565
566 /** Dynamic neighbor listening ranges */
567 struct list *listen_range[AFI_MAX];
568
569 /* Peer-group config */
570 struct peer *conf;
571 };
572
573 /* BGP Notify message format. */
574 struct bgp_notify {
575 uint8_t code;
576 uint8_t subcode;
577 char *data;
578 bgp_size_t length;
579 uint8_t *raw_data;
580 };
581
582 /* Next hop self address. */
583 struct bgp_nexthop {
584 struct interface *ifp;
585 struct in_addr v4;
586 struct in6_addr v6_global;
587 struct in6_addr v6_local;
588 };
589
590 /* BGP addpath values */
591 #define BGP_ADDPATH_RX 1
592 #define BGP_ADDPATH_TX 2
593 #define BGP_ADDPATH_ID_LEN 4
594
595 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
596
597 /* Route map direction */
598 #define RMAP_IN 0
599 #define RMAP_OUT 1
600 #define RMAP_MAX 2
601
602 #include "filter.h"
603
604 /* BGP filter structure. */
605 struct bgp_filter {
606 /* Distribute-list. */
607 struct {
608 char *name;
609 struct access_list *alist;
610 } dlist[FILTER_MAX];
611
612 /* Prefix-list. */
613 struct {
614 char *name;
615 struct prefix_list *plist;
616 } plist[FILTER_MAX];
617
618 /* Filter-list. */
619 struct {
620 char *name;
621 struct as_list *aslist;
622 } aslist[FILTER_MAX];
623
624 /* Route-map. */
625 struct {
626 char *name;
627 struct route_map *map;
628 } map[RMAP_MAX];
629
630 /* Unsuppress-map. */
631 struct {
632 char *name;
633 struct route_map *map;
634 } usmap;
635 };
636
637 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
638 a peer who's AS is part of our Confederation. */
639 typedef enum {
640 BGP_PEER_IBGP = 1,
641 BGP_PEER_EBGP,
642 BGP_PEER_INTERNAL,
643 BGP_PEER_CONFED,
644 } bgp_peer_sort_t;
645
646 /* BGP message header and packet size. */
647 #define BGP_MARKER_SIZE 16
648 #define BGP_HEADER_SIZE 19
649 #define BGP_MAX_PACKET_SIZE 4096
650 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
651
652 /*
653 * Trigger delay for bgp_announce_route().
654 */
655 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
656 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
657
658 struct peer_af {
659 /* back pointer to the peer */
660 struct peer *peer;
661
662 /* which subgroup the peer_af belongs to */
663 struct update_subgroup *subgroup;
664
665 /* for being part of an update subgroup's peer list */
666 LIST_ENTRY(peer_af) subgrp_train;
667
668 /* for being part of a packet's peer list */
669 LIST_ENTRY(peer_af) pkt_train;
670
671 struct bpacket *next_pkt_to_send;
672
673 /*
674 * Trigger timer for bgp_announce_route().
675 */
676 struct thread *t_announce_route;
677
678 afi_t afi;
679 safi_t safi;
680 int afid;
681 };
682
683 /* BGP neighbor structure. */
684 struct peer {
685 /* BGP structure. */
686 struct bgp *bgp;
687
688 /* reference count, primarily to allow bgp_process'ing of route_node's
689 * to be done after a struct peer is deleted.
690 *
691 * named 'lock' for hysterical reasons within Quagga.
692 */
693 int lock;
694
695 /* BGP peer group. */
696 struct peer_group *group;
697 uint64_t version[AFI_MAX][SAFI_MAX];
698
699 /* BGP peer_af structures, per configured AF on this peer */
700 struct peer_af *peer_af_array[BGP_AF_MAX];
701
702 /* Peer's remote AS number. */
703 int as_type;
704 as_t as;
705
706 /* Peer's local AS number. */
707 as_t local_as;
708
709 bgp_peer_sort_t sort;
710
711 /* Peer's Change local AS number. */
712 as_t change_local_as;
713
714 /* Remote router ID. */
715 struct in_addr remote_id;
716
717 /* Local router ID. */
718 struct in_addr local_id;
719
720 /* Packet receive and send buffer. */
721 pthread_mutex_t io_mtx; // guards ibuf, obuf
722 struct stream_fifo *ibuf; // packets waiting to be processed
723 struct stream_fifo *obuf; // packets waiting to be written
724
725 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
726 struct stream *obuf_work; // WiP buffer used to construct packets
727
728 struct stream *curr; // the current packet being parsed
729
730 /* We use a separate stream to encode MP_REACH_NLRI for efficient
731 * NLRI packing. peer->obuf_work stores all the other attributes. The
732 * actual packet is then constructed by concatenating the two.
733 */
734 struct stream *scratch;
735
736 /* the doppelganger peer structure, due to dual TCP conn setup */
737 struct peer *doppelganger;
738
739 /* Status of the peer. */
740 int status;
741 int ostatus;
742
743 /* FSM events, stored for debug purposes.
744 * Note: uchar used for reduced memory usage.
745 */
746 unsigned char cur_event;
747 unsigned char last_event;
748 unsigned char last_major_event;
749
750 /* Peer index, used for dumping TABLE_DUMP_V2 format */
751 uint16_t table_dump_index;
752
753 /* Peer information */
754 int fd; /* File descriptor */
755 int ttl; /* TTL of TCP connection to the peer. */
756 int rtt; /* Estimated round-trip-time from TCP_INFO */
757 int gtsm_hops; /* minimum hopcount to peer */
758 char *desc; /* Description of the peer. */
759 unsigned short port; /* Destination port for peer */
760 char *host; /* Printable address of the peer. */
761 union sockunion su; /* Sockunion address of the peer. */
762 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
763 time_t uptime; /* Last Up/Down time */
764 time_t readtime; /* Last read time */
765 time_t resettime; /* Last reset time */
766
767 char *conf_if; /* neighbor interface config name. */
768 struct interface *ifp; /* corresponding interface */
769 char *ifname; /* bind interface name. */
770 char *update_if;
771 union sockunion *update_source;
772
773 union sockunion *su_local; /* Sockunion of local address. */
774 union sockunion *su_remote; /* Sockunion of remote address. */
775 int shared_network; /* Is this peer shared same network. */
776 struct bgp_nexthop nexthop; /* Nexthop */
777
778 /* Peer address family configuration. */
779 uint8_t afc[AFI_MAX][SAFI_MAX];
780 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
781 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
782 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
783
784 /* Capability flags (reset in bgp_stop) */
785 uint32_t cap;
786 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
787 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
788 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
789 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
790 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
791 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
792 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
793 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
794 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
795 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
796 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
797 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
798 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
799 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
800 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
801 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
802 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
803
804 /* Capability flags (reset in bgp_stop) */
805 uint32_t af_cap[AFI_MAX][SAFI_MAX];
806 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
807 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
808 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
809 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
810 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
811 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
812 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
813 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
814 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
815 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
816 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
817 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
818 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
819 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
820 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
821
822 /* Global configuration flags. */
823 /*
824 * Parallel array to flags that indicates whether each flag originates
825 * from a peer-group or if it is config that is specific to this
826 * individual peer. If a flag is set independent of the peer-group, the
827 * same bit should be set here. If this peer is a peer-group, this
828 * memory region should be all zeros.
829 *
830 * The assumption is that the default state for all flags is unset,
831 * so if a flag is unset, the corresponding override flag is unset too.
832 * However if a flag is set, the corresponding override flag is set.
833 */
834 uint32_t flags_override;
835 /*
836 * Parallel array to flags that indicates whether the default behavior
837 * of *flags_override* should be inverted. If a flag is unset and the
838 * corresponding invert flag is set, the corresponding override flag
839 * would be set. However if a flag is set and the corresponding invert
840 * flag is unset, the corresponding override flag would be unset.
841 *
842 * This can be used for attributes like *send-community*, which are
843 * implicitely enabled and have to be disabled explicitely, compared to
844 * 'normal' attributes like *next-hop-self* which are implicitely set.
845 *
846 * All operations dealing with flags should apply the following boolean
847 * logic to keep the internal flag system in a sane state:
848 *
849 * value=0 invert=0 Inherit flag if member, otherwise unset flag
850 * value=0 invert=1 Unset flag unconditionally
851 * value=1 invert=0 Set flag unconditionally
852 * value=1 invert=1 Inherit flag if member, otherwise set flag
853 *
854 * Contrary to the implementation of *flags_override*, the flag
855 * inversion state can be set either on the peer OR the peer *and* the
856 * peer-group. This was done on purpose, as the inversion state of a
857 * flag can be determined on either the peer or the peer-group.
858 *
859 * Example: Enabling the cisco configuration mode inverts all flags
860 * related to *send-community* unconditionally for both peer-groups and
861 * peers.
862 *
863 * This behavior is different for interface peers though, which enable
864 * the *extended-nexthop* flag by default, which regular peers do not.
865 * As the peer-group can contain both regular and interface peers, the
866 * flag inversion state must be set on the peer only.
867 *
868 * When a peer inherits the configuration from a peer-group and the
869 * inversion state of the flag differs between peer and peer-group, the
870 * newly set value must equal to the inverted state of the peer-group.
871 */
872 uint32_t flags_invert;
873 /*
874 * Effective array for storing the peer/peer-group flags. In case of a
875 * peer-group, the peer-specific overrides (see flags_override and
876 * flags_invert) must be respected.
877 */
878 uint32_t flags;
879 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
880 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
881 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
882 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
883 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
884 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
885 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
886 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
887 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
888 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
889 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
890 #define PEER_FLAG_LONESOUL (1 << 11)
891 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
892 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
893 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
894 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
895 #define PEER_FLAG_ENFORCE_FIRST_AS (1 << 16) /* enforce-first-as */
896 #define PEER_FLAG_ROUTEADV (1 << 17) /* route advertise */
897 #define PEER_FLAG_TIMER (1 << 18) /* keepalive & holdtime */
898 #define PEER_FLAG_TIMER_CONNECT (1 << 19) /* connect timer */
899 #define PEER_FLAG_PASSWORD (1 << 20) /* password */
900 #define PEER_FLAG_LOCAL_AS (1 << 21) /* local-as */
901 #define PEER_FLAG_UPDATE_SOURCE (1 << 22) /* update-source */
902
903 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
904 char *tx_shutdown_message;
905
906 /* NSF mode (graceful restart) */
907 uint8_t nsf[AFI_MAX][SAFI_MAX];
908
909 /* Peer Per AF flags */
910 /*
911 * Please consult the comments for *flags_override*, *flags_invert* and
912 * *flags* to understand what these three arrays do. The address-family
913 * specific attributes are being treated the exact same way as global
914 * peer attributes.
915 */
916 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
917 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
918 uint32_t af_flags[AFI_MAX][SAFI_MAX];
919 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
920 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
921 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
922 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
923 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
924 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
925 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
926 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
927 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
928 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
929 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
930 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
931 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
932 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
933 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
934 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
935 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
936 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
937 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
938 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
939 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
940 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
941 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS (1 << 22) /* addpath-tx-all-paths */
942 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
943 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
944 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
945 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
946
947 /* MD5 password */
948 char *password;
949
950 /* default-originate route-map. */
951 struct {
952 char *name;
953 struct route_map *map;
954 } default_rmap[AFI_MAX][SAFI_MAX];
955
956 /* Peer status flags. */
957 uint16_t sflags;
958 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
959 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
960 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
961 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
962 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
963 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
964 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
965
966 /* Peer status af flags (reset in bgp_stop) */
967 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
968 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
969 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
970 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
971 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
972 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
973 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
974
975 /* Configured timer values. */
976 _Atomic uint32_t holdtime;
977 _Atomic uint32_t keepalive;
978 _Atomic uint32_t connect;
979 _Atomic uint32_t routeadv;
980
981 /* Timer values. */
982 _Atomic uint32_t v_start;
983 _Atomic uint32_t v_connect;
984 _Atomic uint32_t v_holdtime;
985 _Atomic uint32_t v_keepalive;
986 _Atomic uint32_t v_routeadv;
987 _Atomic uint32_t v_pmax_restart;
988 _Atomic uint32_t v_gr_restart;
989
990 /* Threads. */
991 struct thread *t_read;
992 struct thread *t_write;
993 struct thread *t_start;
994 struct thread *t_connect_check_r;
995 struct thread *t_connect_check_w;
996 struct thread *t_connect;
997 struct thread *t_holdtime;
998 struct thread *t_routeadv;
999 struct thread *t_pmax_restart;
1000 struct thread *t_gr_restart;
1001 struct thread *t_gr_stale;
1002 struct thread *t_generate_updgrp_packets;
1003 struct thread *t_process_packet;
1004
1005 /* Thread flags. */
1006 _Atomic uint16_t thread_flags;
1007 #define PEER_THREAD_WRITES_ON (1 << 0)
1008 #define PEER_THREAD_READS_ON (1 << 1)
1009 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
1010 /* workqueues */
1011 struct work_queue *clear_node_queue;
1012
1013 #define PEER_TOTAL_RX(peer) \
1014 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1015 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1016 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1017 + atomic_load_explicit(&peer->refresh_in, \
1018 memory_order_relaxed) \
1019 + atomic_load_explicit(&peer->keepalive_in, \
1020 memory_order_relaxed) \
1021 + atomic_load_explicit(&peer->dynamic_cap_in, \
1022 memory_order_relaxed)
1023
1024 #define PEER_TOTAL_TX(peer) \
1025 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1026 + atomic_load_explicit(&peer->update_out, \
1027 memory_order_relaxed) \
1028 + atomic_load_explicit(&peer->notify_out, \
1029 memory_order_relaxed) \
1030 + atomic_load_explicit(&peer->refresh_out, \
1031 memory_order_relaxed) \
1032 + atomic_load_explicit(&peer->keepalive_out, \
1033 memory_order_relaxed) \
1034 + atomic_load_explicit(&peer->dynamic_cap_out, \
1035 memory_order_relaxed)
1036
1037 /* Statistics field */
1038 _Atomic uint32_t open_in; /* Open message input count */
1039 _Atomic uint32_t open_out; /* Open message output count */
1040 _Atomic uint32_t update_in; /* Update message input count */
1041 _Atomic uint32_t update_out; /* Update message ouput count */
1042 _Atomic time_t update_time; /* Update message received time. */
1043 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1044 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1045 _Atomic uint32_t notify_in; /* Notify input count */
1046 _Atomic uint32_t notify_out; /* Notify output count */
1047 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1048 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1049 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1050 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1051
1052 /* BGP state count */
1053 uint32_t established; /* Established */
1054 uint32_t dropped; /* Dropped */
1055
1056 /* Update delay related fields */
1057 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1058 for EOR */
1059
1060 /* Syncronization list and time. */
1061 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1062 time_t synctime;
1063 /* timestamp when the last UPDATE msg was written */
1064 _Atomic time_t last_write;
1065 /* timestamp when the last msg was written */
1066 _Atomic time_t last_update;
1067
1068 /* Send prefix count. */
1069 unsigned long scount[AFI_MAX][SAFI_MAX];
1070
1071 /* Notify data. */
1072 struct bgp_notify notify;
1073
1074 /* Filter structure. */
1075 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1076
1077 /*
1078 * Parallel array to filter that indicates whether each filter
1079 * originates from a peer-group or if it is config that is specific to
1080 * this individual peer. If a filter is set independent of the
1081 * peer-group the appropriate bit should be set here. If this peer is a
1082 * peer-group, this memory region should be all zeros. The assumption
1083 * is that the default state for all flags is unset. Due to filters
1084 * having a direction (e.g. in/out/...), this array has a third
1085 * dimension for storing the overrides independently per direction.
1086 *
1087 * Notes:
1088 * - if a filter for an individual peer is unset, the corresponding
1089 * override flag is unset and the peer is considered to be back in
1090 * sync with the peer-group.
1091 * - This does *not* contain the filter values, rather it contains
1092 * whether the filter in filter (struct bgp_filter) is peer-specific.
1093 */
1094 uint8_t filter_override[AFI_MAX][SAFI_MAX][(FILTER_MAX > RMAP_MAX)
1095 ? FILTER_MAX
1096 : RMAP_MAX];
1097 #define PEER_FT_DISTRIBUTE_LIST (1 << 0) /* distribute-list */
1098 #define PEER_FT_FILTER_LIST (1 << 1) /* filter-list */
1099 #define PEER_FT_PREFIX_LIST (1 << 2) /* prefix-list */
1100 #define PEER_FT_ROUTE_MAP (1 << 3) /* route-map */
1101 #define PEER_FT_UNSUPPRESS_MAP (1 << 4) /* unsuppress-map */
1102
1103 /* ORF Prefix-list */
1104 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1105
1106 /* Text description of last attribute rcvd */
1107 char rcvd_attr_str[BUFSIZ];
1108
1109 /* Track if we printed the attribute in debugs */
1110 int rcvd_attr_printed;
1111
1112 /* Prefix count. */
1113 unsigned long pcount[AFI_MAX][SAFI_MAX];
1114
1115 /* Max prefix count. */
1116 unsigned long pmax[AFI_MAX][SAFI_MAX];
1117 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1118 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1119 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1120
1121 /* allowas-in. */
1122 char allowas_in[AFI_MAX][SAFI_MAX];
1123
1124 /* weight */
1125 unsigned long weight[AFI_MAX][SAFI_MAX];
1126
1127 /* peer reset cause */
1128 char last_reset;
1129 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1130 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1131 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1132 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1133 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1134 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1135 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1136 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1137 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1138 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1139 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1140 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1141 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1142 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1143 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1144 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1145 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1146 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1147 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1148 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1149 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1150 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1151 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1152 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1153 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1154 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1155 unsigned long last_reset_cause_size;
1156 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1157
1158 /* The kind of route-map Flags.*/
1159 uint8_t rmap_type;
1160 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1161 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1162 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1163 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1164 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1165 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1166 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1167 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1168
1169 /* peer specific BFD information */
1170 struct bfd_info *bfd_info;
1171
1172 /* hostname and domainname advertised by host */
1173 char *hostname;
1174 char *domainname;
1175
1176 QOBJ_FIELDS
1177 };
1178 DECLARE_QOBJ_TYPE(peer)
1179
1180 /* Inherit peer attribute from peer-group. */
1181 #define PEER_ATTR_INHERIT(peer, group, attr) \
1182 ((peer)->attr = (group)->conf->attr)
1183 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1184 do { \
1185 if ((peer)->attr) \
1186 XFREE(mt, (peer)->attr); \
1187 if ((group)->conf->attr) \
1188 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1189 else \
1190 (peer)->attr = NULL; \
1191 } while (0)
1192 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1193 do { \
1194 if ((peer)->attr) \
1195 sockunion_free((peer)->attr); \
1196 if ((group)->conf->attr) \
1197 (peer)->attr = sockunion_dup((group)->conf->attr); \
1198 else \
1199 (peer)->attr = NULL; \
1200 } while (0)
1201
1202 /* Check if suppress start/restart of sessions to peer. */
1203 #define BGP_PEER_START_SUPPRESSED(P) \
1204 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1205 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1206
1207 #define PEER_PASSWORD_MINLEN (1)
1208 #define PEER_PASSWORD_MAXLEN (80)
1209
1210 /* This structure's member directly points incoming packet data
1211 stream. */
1212 struct bgp_nlri {
1213 /* AFI. */
1214 uint16_t afi; /* iana_afi_t */
1215
1216 /* SAFI. */
1217 uint8_t safi; /* iana_safi_t */
1218
1219 /* Pointer to NLRI byte stream. */
1220 uint8_t *nlri;
1221
1222 /* Length of whole NLRI. */
1223 bgp_size_t length;
1224 };
1225
1226 /* BGP versions. */
1227 #define BGP_VERSION_4 4
1228
1229 /* Default BGP port number. */
1230 #define BGP_PORT_DEFAULT 179
1231
1232 /* BGP minimum message size. */
1233 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1234 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1235 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1236 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1237 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1238 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1239
1240 /* BGP message types. */
1241 #define BGP_MSG_OPEN 1
1242 #define BGP_MSG_UPDATE 2
1243 #define BGP_MSG_NOTIFY 3
1244 #define BGP_MSG_KEEPALIVE 4
1245 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1246 #define BGP_MSG_CAPABILITY 6
1247 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1248
1249 /* BGP open optional parameter. */
1250 #define BGP_OPEN_OPT_AUTH 1
1251 #define BGP_OPEN_OPT_CAP 2
1252
1253 /* BGP4 attribute type codes. */
1254 #define BGP_ATTR_ORIGIN 1
1255 #define BGP_ATTR_AS_PATH 2
1256 #define BGP_ATTR_NEXT_HOP 3
1257 #define BGP_ATTR_MULTI_EXIT_DISC 4
1258 #define BGP_ATTR_LOCAL_PREF 5
1259 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1260 #define BGP_ATTR_AGGREGATOR 7
1261 #define BGP_ATTR_COMMUNITIES 8
1262 #define BGP_ATTR_ORIGINATOR_ID 9
1263 #define BGP_ATTR_CLUSTER_LIST 10
1264 #define BGP_ATTR_DPA 11
1265 #define BGP_ATTR_ADVERTISER 12
1266 #define BGP_ATTR_RCID_PATH 13
1267 #define BGP_ATTR_MP_REACH_NLRI 14
1268 #define BGP_ATTR_MP_UNREACH_NLRI 15
1269 #define BGP_ATTR_EXT_COMMUNITIES 16
1270 #define BGP_ATTR_AS4_PATH 17
1271 #define BGP_ATTR_AS4_AGGREGATOR 18
1272 #define BGP_ATTR_AS_PATHLIMIT 21
1273 #define BGP_ATTR_PMSI_TUNNEL 22
1274 #define BGP_ATTR_ENCAP 23
1275 #define BGP_ATTR_LARGE_COMMUNITIES 32
1276 #define BGP_ATTR_PREFIX_SID 40
1277 #if ENABLE_BGP_VNC
1278 #define BGP_ATTR_VNC 255
1279 #endif
1280
1281 /* BGP update origin. */
1282 #define BGP_ORIGIN_IGP 0
1283 #define BGP_ORIGIN_EGP 1
1284 #define BGP_ORIGIN_INCOMPLETE 2
1285
1286 /* BGP notify message codes. */
1287 #define BGP_NOTIFY_HEADER_ERR 1
1288 #define BGP_NOTIFY_OPEN_ERR 2
1289 #define BGP_NOTIFY_UPDATE_ERR 3
1290 #define BGP_NOTIFY_HOLD_ERR 4
1291 #define BGP_NOTIFY_FSM_ERR 5
1292 #define BGP_NOTIFY_CEASE 6
1293 #define BGP_NOTIFY_CAPABILITY_ERR 7
1294
1295 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1296
1297 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1298 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1299 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1300 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1301
1302 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1303 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1304 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1305 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1306 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1307 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1308 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1309 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1310 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1311
1312 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1313 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1314 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1315 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1316 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1317 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1318 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1319 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1320 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1321 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1322 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1323 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1324
1325 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1326 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1327 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1328 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1329 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1330 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1331 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1332 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1333 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1334
1335 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1336 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1337 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1338 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1339
1340 /* BGP finite state machine status. */
1341 #define Idle 1
1342 #define Connect 2
1343 #define Active 3
1344 #define OpenSent 4
1345 #define OpenConfirm 5
1346 #define Established 6
1347 #define Clearing 7
1348 #define Deleted 8
1349 #define BGP_STATUS_MAX 9
1350
1351 /* BGP finite state machine events. */
1352 #define BGP_Start 1
1353 #define BGP_Stop 2
1354 #define TCP_connection_open 3
1355 #define TCP_connection_closed 4
1356 #define TCP_connection_open_failed 5
1357 #define TCP_fatal_error 6
1358 #define ConnectRetry_timer_expired 7
1359 #define Hold_Timer_expired 8
1360 #define KeepAlive_timer_expired 9
1361 #define Receive_OPEN_message 10
1362 #define Receive_KEEPALIVE_message 11
1363 #define Receive_UPDATE_message 12
1364 #define Receive_NOTIFICATION_message 13
1365 #define Clearing_Completed 14
1366 #define BGP_EVENTS_MAX 15
1367
1368 /* BGP timers default value. */
1369 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1370 #define BGP_INIT_START_TIMER 1
1371 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1372 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1373 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1374 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1375 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1376
1377 /* BGP default local preference. */
1378 #define BGP_DEFAULT_LOCAL_PREF 100
1379
1380 /* BGP local-preference to send when 'bgp graceful-shutdown'
1381 * is configured */
1382 #define BGP_GSHUT_LOCAL_PREF 0
1383
1384 /* BGP default subgroup packet queue max . */
1385 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1386
1387 /* BGP graceful restart */
1388 #define BGP_DEFAULT_RESTART_TIME 120
1389 #define BGP_DEFAULT_STALEPATH_TIME 360
1390
1391 /* BGP uptime string length. */
1392 #define BGP_UPTIME_LEN 25
1393
1394 /* Default configuration settings for bgpd. */
1395 #define BGP_VTY_PORT 2605
1396 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1397
1398 /* Check AS path loop when we send NLRI. */
1399 /* #define BGP_SEND_ASPATH_CHECK */
1400
1401 /* BGP Dynamic Neighbors feature */
1402 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1403 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1404 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1405
1406 /* Flag for peer_clear_soft(). */
1407 enum bgp_clear_type {
1408 BGP_CLEAR_SOFT_NONE,
1409 BGP_CLEAR_SOFT_OUT,
1410 BGP_CLEAR_SOFT_IN,
1411 BGP_CLEAR_SOFT_BOTH,
1412 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1413 };
1414
1415 /* Macros. */
1416 #define BGP_INPUT(P) ((P)->curr)
1417 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1418 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1419 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1420
1421 /* BGP error codes. */
1422 #define BGP_SUCCESS 0
1423 #define BGP_ERR_INVALID_VALUE -1
1424 #define BGP_ERR_INVALID_FLAG -2
1425 #define BGP_ERR_INVALID_AS -3
1426 #define BGP_ERR_INVALID_BGP -4
1427 #define BGP_ERR_PEER_GROUP_MEMBER -5
1428 #define BGP_ERR_MULTIPLE_INSTANCE_USED -6
1429 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1430 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1431 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1432 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1433 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET -11
1434 #define BGP_ERR_AS_MISMATCH -12
1435 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1436 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1437 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1438 #define BGP_ERR_NOT_INTERNAL_PEER -16
1439 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1440 #define BGP_ERR_AF_UNCONFIGURED -18
1441 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1442 #define BGP_ERR_INSTANCE_MISMATCH -20
1443 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1444 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1445 #define BGP_ERR_TCPSIG_FAILED -23
1446 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1447 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1448 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1449 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1450 #define BGP_ERR_AS_OVERRIDE -28
1451 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1452 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1453 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1454 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1455 #define BGP_ERR_MAX -33
1456 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1457 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1458
1459 /*
1460 * Enumeration of different policy kinds a peer can be configured with.
1461 */
1462 typedef enum {
1463 BGP_POLICY_ROUTE_MAP,
1464 BGP_POLICY_FILTER_LIST,
1465 BGP_POLICY_PREFIX_LIST,
1466 BGP_POLICY_DISTRIBUTE_LIST,
1467 } bgp_policy_type_e;
1468
1469 extern struct bgp_master *bm;
1470 extern unsigned int multipath_num;
1471
1472 /* Prototypes. */
1473 extern void bgp_terminate(void);
1474 extern void bgp_reset(void);
1475 extern time_t bgp_clock(void);
1476 extern void bgp_zclient_reset(void);
1477 extern struct bgp *bgp_get_default(void);
1478 extern struct bgp *bgp_lookup(as_t, const char *);
1479 extern struct bgp *bgp_lookup_by_name(const char *);
1480 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1481 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1482 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1483 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1484 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1485 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1486 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1487 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1488 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1489 union sockunion *,
1490 struct peer_group *);
1491 extern struct prefix *
1492 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1493 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1494 struct prefix *,
1495 struct prefix **);
1496 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1497 union sockunion *);
1498
1499 /*
1500 * Peers are incredibly easy to memory leak
1501 * due to the various ways that they are actually used
1502 * Provide some functionality to debug locks and unlocks
1503 */
1504 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1505 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1506 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1507 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1508
1509 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1510 extern int peer_active(struct peer *);
1511 extern int peer_active_nego(struct peer *);
1512 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1513 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1514 as_t, as_t, int, afi_t, safi_t,
1515 struct peer_group *);
1516 extern struct peer *peer_create_accept(struct bgp *);
1517 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1518 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1519 json_object *json);
1520
1521 extern int bgp_config_write(struct vty *);
1522
1523 extern void bgp_master_init(struct thread_master *master);
1524
1525 extern void bgp_init(unsigned short instance);
1526 extern void bgp_pthreads_run(void);
1527 extern void bgp_pthreads_finish(void);
1528 extern void bgp_route_map_init(void);
1529 extern void bgp_session_reset(struct peer *);
1530
1531 extern int bgp_option_set(int);
1532 extern int bgp_option_unset(int);
1533 extern int bgp_option_check(int);
1534
1535 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1536 extern void bgp_instance_up(struct bgp *);
1537 extern void bgp_instance_down(struct bgp *);
1538 extern int bgp_delete(struct bgp *);
1539
1540 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1541 vrf_id_t old_vrf_id, bool create);
1542
1543 extern int bgp_flag_set(struct bgp *, int);
1544 extern int bgp_flag_unset(struct bgp *, int);
1545 extern int bgp_flag_check(struct bgp *, int);
1546
1547 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1548 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1549
1550 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1551 extern int bgp_cluster_id_unset(struct bgp *);
1552
1553 extern int bgp_confederation_id_set(struct bgp *, as_t);
1554 extern int bgp_confederation_id_unset(struct bgp *);
1555 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1556
1557 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1558 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1559
1560 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1561 extern int bgp_timers_unset(struct bgp *);
1562
1563 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1564 extern int bgp_default_local_preference_unset(struct bgp *);
1565
1566 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1567 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1568
1569 extern int bgp_listen_limit_set(struct bgp *, int);
1570 extern int bgp_listen_limit_unset(struct bgp *);
1571
1572 extern int bgp_update_delay_active(struct bgp *);
1573 extern int bgp_update_delay_configured(struct bgp *);
1574 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1575 extern void peer_as_change(struct peer *, as_t, int);
1576 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1577 int, afi_t, safi_t);
1578 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1579 extern int peer_delete(struct peer *peer);
1580 extern int peer_group_delete(struct peer_group *);
1581 extern int peer_group_remote_as_delete(struct peer_group *);
1582 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1583
1584 extern int peer_activate(struct peer *, afi_t, safi_t);
1585 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1586 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1587
1588 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1589 struct peer_group *, as_t *);
1590
1591 extern int peer_flag_set(struct peer *, uint32_t);
1592 extern int peer_flag_unset(struct peer *, uint32_t);
1593 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1594
1595 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1596 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1597 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1598 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1599 uint32_t flag);
1600
1601 extern int peer_ebgp_multihop_set(struct peer *, int);
1602 extern int peer_ebgp_multihop_unset(struct peer *);
1603 extern int is_ebgp_multihop_configured(struct peer *peer);
1604
1605 extern int peer_description_set(struct peer *, const char *);
1606 extern int peer_description_unset(struct peer *);
1607
1608 extern int peer_update_source_if_set(struct peer *, const char *);
1609 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1610 extern int peer_update_source_unset(struct peer *);
1611
1612 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1613 const char *rmap,
1614 struct route_map *route_map);
1615 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1616
1617 extern int peer_port_set(struct peer *, uint16_t);
1618 extern int peer_port_unset(struct peer *);
1619
1620 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1621 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1622
1623 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1624 uint32_t holdtime);
1625 extern int peer_timers_unset(struct peer *);
1626
1627 extern int peer_timers_connect_set(struct peer *, uint32_t);
1628 extern int peer_timers_connect_unset(struct peer *);
1629
1630 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1631 extern int peer_advertise_interval_unset(struct peer *);
1632
1633 extern void peer_interface_set(struct peer *, const char *);
1634 extern void peer_interface_unset(struct peer *);
1635
1636 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1637 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1638
1639 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1640 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1641
1642 extern int peer_local_as_set(struct peer *, as_t, int, int);
1643 extern int peer_local_as_unset(struct peer *);
1644
1645 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1646 const char *);
1647 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1648
1649 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1650 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1651
1652 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1653 const char *name, struct route_map *route_map);
1654 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1655
1656 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1657 const char *name,
1658 struct route_map *route_map);
1659
1660 extern int peer_password_set(struct peer *, const char *);
1661 extern int peer_password_unset(struct peer *);
1662
1663 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1664
1665 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1666 uint8_t, int, uint16_t);
1667 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1668
1669 extern int peer_clear(struct peer *, struct listnode **);
1670 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1671
1672 extern int peer_ttl_security_hops_set(struct peer *, int);
1673 extern int peer_ttl_security_hops_unset(struct peer *);
1674
1675 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1676 extern int peer_tx_shutdown_message_unset(struct peer *);
1677
1678 extern int bgp_route_map_update_timer(struct thread *thread);
1679 extern void bgp_route_map_terminate(void);
1680
1681 extern int peer_cmp(struct peer *p1, struct peer *p2);
1682
1683 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1684 afi_t *afi, safi_t *safi);
1685 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1686 iana_afi_t *pkt_afi,
1687 iana_safi_t *pkt_safi);
1688
1689 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1690 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1691 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1692
1693 extern void bgp_close(void);
1694 extern void bgp_free(struct bgp *);
1695
1696 static inline struct bgp *bgp_lock(struct bgp *bgp)
1697 {
1698 bgp->lock++;
1699 return bgp;
1700 }
1701
1702 static inline void bgp_unlock(struct bgp *bgp)
1703 {
1704 assert(bgp->lock > 0);
1705 if (--bgp->lock == 0)
1706 bgp_free(bgp);
1707 }
1708
1709 static inline int afindex(afi_t afi, safi_t safi)
1710 {
1711 switch (afi) {
1712 case AFI_IP:
1713 switch (safi) {
1714 case SAFI_UNICAST:
1715 return BGP_AF_IPV4_UNICAST;
1716 break;
1717 case SAFI_MULTICAST:
1718 return BGP_AF_IPV4_MULTICAST;
1719 break;
1720 case SAFI_LABELED_UNICAST:
1721 return BGP_AF_IPV4_LBL_UNICAST;
1722 break;
1723 case SAFI_MPLS_VPN:
1724 return BGP_AF_IPV4_VPN;
1725 break;
1726 case SAFI_ENCAP:
1727 return BGP_AF_IPV4_ENCAP;
1728 break;
1729 case SAFI_FLOWSPEC:
1730 return BGP_AF_IPV4_FLOWSPEC;
1731 default:
1732 return BGP_AF_MAX;
1733 break;
1734 }
1735 break;
1736 case AFI_IP6:
1737 switch (safi) {
1738 case SAFI_UNICAST:
1739 return BGP_AF_IPV6_UNICAST;
1740 break;
1741 case SAFI_MULTICAST:
1742 return BGP_AF_IPV6_MULTICAST;
1743 break;
1744 case SAFI_LABELED_UNICAST:
1745 return BGP_AF_IPV6_LBL_UNICAST;
1746 break;
1747 case SAFI_MPLS_VPN:
1748 return BGP_AF_IPV6_VPN;
1749 break;
1750 case SAFI_ENCAP:
1751 return BGP_AF_IPV6_ENCAP;
1752 break;
1753 case SAFI_FLOWSPEC:
1754 return BGP_AF_IPV6_FLOWSPEC;
1755 default:
1756 return BGP_AF_MAX;
1757 break;
1758 }
1759 break;
1760 case AFI_L2VPN:
1761 switch (safi) {
1762 case SAFI_EVPN:
1763 return BGP_AF_L2VPN_EVPN;
1764 break;
1765 default:
1766 return BGP_AF_MAX;
1767 break;
1768 }
1769 default:
1770 return BGP_AF_MAX;
1771 break;
1772 }
1773 }
1774
1775 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1776 static inline int peer_group_active(struct peer *peer)
1777 {
1778 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1779 return 1;
1780 return 0;
1781 }
1782
1783 /* If peer is negotiated at least one address family return 1. */
1784 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1785 {
1786 if (peer->afc_nego[afi][SAFI_UNICAST]
1787 || peer->afc_nego[afi][SAFI_MULTICAST]
1788 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1789 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1790 || peer->afc_nego[afi][SAFI_ENCAP]
1791 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1792 || peer->afc_nego[afi][SAFI_EVPN])
1793 return 1;
1794 return 0;
1795 }
1796
1797 /* If at least one address family activated for group, return 1. */
1798 static inline int peer_group_af_configured(struct peer_group *group)
1799 {
1800 struct peer *peer = group->conf;
1801
1802 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1803 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1804 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1805 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1806 || peer->afc[AFI_IP6][SAFI_UNICAST]
1807 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1808 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1809 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1810 || peer->afc[AFI_IP6][SAFI_ENCAP]
1811 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1812 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1813 return 1;
1814 return 0;
1815 }
1816
1817 static inline char *timestamp_string(time_t ts)
1818 {
1819 time_t tbuf;
1820 tbuf = time(NULL) - (bgp_clock() - ts);
1821 return ctime(&tbuf);
1822 }
1823
1824 static inline int peer_established(struct peer *peer)
1825 {
1826 if (peer->status == Established)
1827 return 1;
1828 return 0;
1829 }
1830
1831 static inline int peer_dynamic_neighbor(struct peer *peer)
1832 {
1833 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1834 }
1835
1836 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1837 {
1838 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1839 }
1840
1841 /* Lookup VRF for BGP instance based on its type. */
1842 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1843 {
1844 struct vrf *vrf;
1845
1846 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1847 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1848 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1849 vrf = vrf_lookup_by_name(bgp->name);
1850 else
1851 vrf = NULL;
1852
1853 return vrf;
1854 }
1855
1856 /* Link BGP instance to VRF. */
1857 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1858 {
1859 bgp->vrf_id = vrf->vrf_id;
1860 if (vrf->info != (void *)bgp)
1861 vrf->info = (void *)bgp_lock(bgp);
1862 }
1863
1864 /* Unlink BGP instance from VRF. */
1865 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1866 {
1867 if (vrf->info == (void *)bgp) {
1868 vrf->info = NULL;
1869 bgp_unlock(bgp);
1870 }
1871 bgp->vrf_id = VRF_UNKNOWN;
1872 }
1873
1874 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1875
1876 /* For benefit of rfapi */
1877 extern struct peer *peer_new(struct bgp *bgp);
1878
1879 #endif /* _QUAGGA_BGPD_H */
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