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Merge pull request #3860 from AkhileshSamineni/show_bgp_af_neigh_fix
[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 #define FOREACH_SAFI(safi) \
103 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
104
105 extern struct frr_pthread *bgp_pth_io;
106 extern struct frr_pthread *bgp_pth_ka;
107
108 /* BGP master for system wide configurations and variables. */
109 struct bgp_master {
110 /* BGP instance list. */
111 struct list *bgp;
112
113 /* BGP thread master. */
114 struct thread_master *master;
115
116 /* work queues */
117 struct work_queue *process_main_queue;
118
119 /* Listening sockets */
120 struct list *listen_sockets;
121
122 /* BGP port number. */
123 uint16_t port;
124
125 /* Listener address */
126 char *address;
127
128 /* The Mac table */
129 struct hash *self_mac_hash;
130
131 /* BGP start time. */
132 time_t start_time;
133
134 /* Various BGP global configuration. */
135 uint8_t options;
136 #define BGP_OPT_NO_FIB (1 << 0)
137 #define BGP_OPT_MULTIPLE_INSTANCE (1 << 1)
138 #define BGP_OPT_CONFIG_CISCO (1 << 2)
139 #define BGP_OPT_NO_LISTEN (1 << 3)
140 #define BGP_OPT_NO_ZEBRA (1 << 4)
141
142 uint64_t updgrp_idspace;
143 uint64_t subgrp_idspace;
144
145 /* timer to dampen route map changes */
146 struct thread *t_rmap_update; /* Handle route map updates */
147 uint32_t rmap_update_timer; /* Route map update timer */
148 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
149
150 /* Id space for automatic RD derivation for an EVI/VRF */
151 bitfield_t rd_idspace;
152
153 /* dynamic mpls label allocation pool */
154 struct labelpool labelpool;
155
156 bool terminating; /* global flag that sigint terminate seen */
157 QOBJ_FIELDS
158 };
159 DECLARE_QOBJ_TYPE(bgp_master)
160
161 /* BGP route-map structure. */
162 struct bgp_rmap {
163 char *name;
164 struct route_map *map;
165 };
166
167 struct bgp_redist {
168 unsigned short instance;
169
170 /* BGP redistribute metric configuration. */
171 uint8_t redist_metric_flag;
172 uint32_t redist_metric;
173
174 /* BGP redistribute route-map. */
175 struct bgp_rmap rmap;
176 };
177
178 typedef enum {
179 BGP_VPN_POLICY_DIR_FROMVPN = 0,
180 BGP_VPN_POLICY_DIR_TOVPN = 1,
181 BGP_VPN_POLICY_DIR_MAX = 2
182 } vpn_policy_direction_t;
183
184 struct vpn_policy {
185 struct bgp *bgp; /* parent */
186 afi_t afi;
187 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
188 struct ecommunity *import_redirect_rtlist;
189 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
190 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
191
192 /* should be mpls_label_t? */
193 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
194 uint32_t tovpn_zebra_vrf_label_last_sent;
195 struct prefix_rd tovpn_rd;
196 struct prefix tovpn_nexthop; /* unset => set to 0 */
197 uint32_t flags;
198 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
199 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
200 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
201
202 /*
203 * If we are importing another vrf into us keep a list of
204 * vrf names that are being imported into us.
205 */
206 struct list *import_vrf;
207
208 /*
209 * if we are being exported to another vrf keep a list of
210 * vrf names that we are being exported to.
211 */
212 struct list *export_vrf;
213 };
214
215 /*
216 * Type of 'struct bgp'.
217 * - Default: The default instance
218 * - VRF: A specific (non-default) VRF
219 * - View: An instance used for route exchange
220 * The "default" instance is treated separately to simplify the code. Note
221 * that if deployed in a Multi-VRF environment, it may not exist.
222 */
223 enum bgp_instance_type {
224 BGP_INSTANCE_TYPE_DEFAULT,
225 BGP_INSTANCE_TYPE_VRF,
226 BGP_INSTANCE_TYPE_VIEW
227 };
228
229 /* BGP instance structure. */
230 struct bgp {
231 /* AS number of this BGP instance. */
232 as_t as;
233
234 /* Name of this BGP instance. */
235 char *name;
236 char *name_pretty; /* printable "VRF|VIEW name|default" */
237
238 /* Type of instance and VRF id. */
239 enum bgp_instance_type inst_type;
240 vrf_id_t vrf_id;
241
242 /* Reference count to allow peer_delete to finish after bgp_delete */
243 int lock;
244
245 /* Self peer. */
246 struct peer *peer_self;
247
248 /* BGP peer. */
249 struct list *peer;
250 struct hash *peerhash;
251
252 /* BGP peer group. */
253 struct list *group;
254
255 /* The maximum number of BGP dynamic neighbors that can be created */
256 int dynamic_neighbors_limit;
257
258 /* The current number of BGP dynamic neighbors */
259 int dynamic_neighbors_count;
260
261 struct hash *update_groups[BGP_AF_MAX];
262
263 /*
264 * Global statistics for update groups.
265 */
266 struct {
267 uint32_t join_events;
268 uint32_t prune_events;
269 uint32_t merge_events;
270 uint32_t split_events;
271 uint32_t updgrp_switch_events;
272 uint32_t peer_refreshes_combined;
273 uint32_t adj_count;
274 uint32_t merge_checks_triggered;
275
276 uint32_t updgrps_created;
277 uint32_t updgrps_deleted;
278 uint32_t subgrps_created;
279 uint32_t subgrps_deleted;
280 } update_group_stats;
281
282 /* BGP configuration. */
283 uint16_t config;
284 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
285 #define BGP_CONFIG_CONFEDERATION (1 << 1)
286
287 /* BGP router identifier. */
288 struct in_addr router_id;
289 struct in_addr router_id_static;
290 struct in_addr router_id_zebra;
291
292 /* BGP route reflector cluster ID. */
293 struct in_addr cluster_id;
294
295 /* BGP confederation information. */
296 as_t confed_id;
297 as_t *confed_peers;
298 int confed_peers_cnt;
299
300 struct thread
301 *t_startup; /* start-up timer on only once at the beginning */
302
303 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
304 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
305 uint32_t maxmed_onstartup_value; /* Max-med value when active on
306 start-up */
307 struct thread
308 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
309 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
310
311 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
312 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
313 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
314 */
315 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
316
317 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
318 uint32_t maxmed_value; /* Max-med value when its active */
319
320 /* BGP update delay on startup */
321 struct thread *t_update_delay;
322 struct thread *t_establish_wait;
323 uint8_t update_delay_over;
324 uint8_t main_zebra_update_hold;
325 uint8_t main_peers_update_hold;
326 uint16_t v_update_delay;
327 uint16_t v_establish_wait;
328 char update_delay_begin_time[64];
329 char update_delay_end_time[64];
330 char update_delay_zebra_resume_time[64];
331 char update_delay_peers_resume_time[64];
332 uint32_t established;
333 uint32_t restarted_peers;
334 uint32_t implicit_eors;
335 uint32_t explicit_eors;
336 #define BGP_UPDATE_DELAY_DEF 0
337 #define BGP_UPDATE_DELAY_MIN 0
338 #define BGP_UPDATE_DELAY_MAX 3600
339
340 /* BGP flags. */
341 uint32_t flags;
342 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
343 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
344 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
345 #define BGP_FLAG_MED_CONFED (1 << 3)
346 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
347 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
348 #define BGP_FLAG_ENFORCE_FIRST_AS (1 << 6)
349 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
350 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
351 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
352 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
353 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
354 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
355 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
356 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
357 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
358 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
359 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
360 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
361 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
362 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
363 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
364
365 /* BGP Per AF flags */
366 uint16_t af_flags[AFI_MAX][SAFI_MAX];
367 #define BGP_CONFIG_DAMPENING (1 << 0)
368 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
369 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
370 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
371 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
372 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
373 /* import/export between address families */
374 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
375 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
376 /* vrf-route leaking flags */
377 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
378 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
379
380 /* Route table for next-hop lookup cache. */
381 struct bgp_table *nexthop_cache_table[AFI_MAX];
382
383 /* Route table for import-check */
384 struct bgp_table *import_check_table[AFI_MAX];
385
386 struct bgp_table *connected_table[AFI_MAX];
387
388 struct hash *address_hash;
389
390 /* DB for all local tunnel-ips - used mainly for martian checks
391 Currently it only has all VxLan tunnel IPs*/
392 struct hash *tip_hash;
393
394 /* Static route configuration. */
395 struct bgp_table *route[AFI_MAX][SAFI_MAX];
396
397 /* Aggregate address configuration. */
398 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
399
400 /* BGP routing information base. */
401 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
402
403 /* BGP table route-map. */
404 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
405
406 /* BGP redistribute configuration. */
407 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
408
409 /* Allocate MPLS labels */
410 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
411
412 /* Allocate hash entries to store policy routing information
413 * The hash are used to host pbr rules somewhere.
414 * Actually, pbr will only be used by flowspec
415 * those hash elements will have relationship together as
416 * illustrated in below diagram:
417 *
418 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
419 * <----- pbr_match j <--- pbr_match_entry 1..m
420 * <----- pbr_rule k
421 *
422 * - here in BGP structure, the list of match and actions will
423 * stand for the list of ipset sets, and table_ids in the kernel
424 * - the arrow above between pbr_match and pbr_action indicate
425 * that a backpointer permits match to find the action
426 * - the arrow betwen match_entry and match is a hash list
427 * contained in match, that lists the whole set of entries
428 */
429 struct hash *pbr_match_hash;
430 struct hash *pbr_rule_hash;
431 struct hash *pbr_action_hash;
432
433 /* timer to re-evaluate neighbor default-originate route-maps */
434 struct thread *t_rmap_def_originate_eval;
435 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
436
437 /* BGP distance configuration. */
438 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
439 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
440 uint8_t distance_local[AFI_MAX][SAFI_MAX];
441
442 /* BGP default local-preference. */
443 uint32_t default_local_pref;
444
445 /* BGP default subgroup pkt queue max */
446 uint32_t default_subgroup_pkt_queue_max;
447
448 /* BGP default timer. */
449 uint32_t default_holdtime;
450 uint32_t default_keepalive;
451
452 /* BGP graceful restart */
453 uint32_t restart_time;
454 uint32_t stalepath_time;
455
456 /* Maximum-paths configuration */
457 struct bgp_maxpaths_cfg {
458 uint16_t maxpaths_ebgp;
459 uint16_t maxpaths_ibgp;
460 uint16_t ibgp_flags;
461 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
462 } maxpaths[AFI_MAX][SAFI_MAX];
463
464 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
465 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
466
467 /* Automatic coalesce adjust on/off */
468 bool heuristic_coalesce;
469 /* Actual coalesce time */
470 uint32_t coalesce_time;
471
472 /* Auto-shutdown new peers */
473 bool autoshutdown;
474
475 struct bgp_addpath_bgp_data tx_addpath;
476
477 #if ENABLE_BGP_VNC
478 struct rfapi_cfg *rfapi_cfg;
479 struct rfapi *rfapi;
480 #endif
481
482 /* EVPN related information */
483
484 /* EVI hash table */
485 struct hash *vnihash;
486
487 /* EVPN enable - advertise gateway macip routes */
488 int advertise_gw_macip;
489
490 /* EVPN enable - advertise local VNIs and their MACs etc. */
491 int advertise_all_vni;
492
493 /* RFC 8212 - prevent route leaks. */
494 int ebgp_requires_policy;
495 #define DEFAULT_EBGP_POLICY_DISABLED 0
496 #define DEFAULT_EBGP_POLICY_ENABLED 1
497
498 struct bgp_evpn_info *evpn_info;
499
500 /* EVPN - use RFC 8365 to auto-derive RT */
501 int advertise_autort_rfc8365;
502
503 /*
504 * Flooding mechanism for BUM packets for VxLAN-EVPN.
505 */
506 enum vxlan_flood_control vxlan_flood_ctrl;
507
508 /* Hash table of Import RTs to EVIs */
509 struct hash *import_rt_hash;
510
511 /* Hash table of VRF import RTs to VRFs */
512 struct hash *vrf_import_rt_hash;
513
514 /* L3-VNI corresponding to this vrf */
515 vni_t l3vni;
516
517 /* router-mac to be used in mac-ip routes for this vrf */
518 struct ethaddr rmac;
519
520 /* originator ip - to be used as NH for type-5 routes */
521 struct in_addr originator_ip;
522
523 /* SVI associated with the L3-VNI corresponding to this vrf */
524 ifindex_t l3vni_svi_ifindex;
525
526 /* vrf flags */
527 uint32_t vrf_flags;
528 #define BGP_VRF_AUTO (1 << 0)
529 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
530 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
531 #define BGP_VRF_RD_CFGD (1 << 3)
532 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
533
534
535 /* unique ID for auto derivation of RD for this vrf */
536 uint16_t vrf_rd_id;
537
538 /* Automatically derived RD for this VRF */
539 struct prefix_rd vrf_prd_auto;
540
541 /* RD for this VRF */
542 struct prefix_rd vrf_prd;
543
544 /* import rt list for the vrf instance */
545 struct list *vrf_import_rtl;
546
547 /* export rt list for the vrf instance */
548 struct list *vrf_export_rtl;
549
550 /* list of corresponding l2vnis (struct bgpevpn) */
551 struct list *l2vnis;
552
553 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
554 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
555
556 struct vpn_policy vpn_policy[AFI_MAX];
557
558 struct bgp_pbr_config *bgp_pbr_cfg;
559
560 /* local esi hash table */
561 struct hash *esihash;
562
563 /* Count of peers in established state */
564 uint32_t established_peers;
565
566 QOBJ_FIELDS
567 };
568 DECLARE_QOBJ_TYPE(bgp)
569
570 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
571
572 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
573 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
574 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
575 && bgp->vrf_id != VRF_UNKNOWN))
576
577 /* BGP peer-group support. */
578 struct peer_group {
579 /* Name of the peer-group. */
580 char *name;
581
582 /* Pointer to BGP. */
583 struct bgp *bgp;
584
585 /* Peer-group client list. */
586 struct list *peer;
587
588 /** Dynamic neighbor listening ranges */
589 struct list *listen_range[AFI_MAX];
590
591 /* Peer-group config */
592 struct peer *conf;
593 };
594
595 /* BGP Notify message format. */
596 struct bgp_notify {
597 uint8_t code;
598 uint8_t subcode;
599 char *data;
600 bgp_size_t length;
601 uint8_t *raw_data;
602 };
603
604 /* Next hop self address. */
605 struct bgp_nexthop {
606 struct interface *ifp;
607 struct in_addr v4;
608 struct in6_addr v6_global;
609 struct in6_addr v6_local;
610 };
611
612 /* BGP addpath values */
613 #define BGP_ADDPATH_RX 1
614 #define BGP_ADDPATH_TX 2
615 #define BGP_ADDPATH_ID_LEN 4
616
617 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
618
619 /* Route map direction */
620 #define RMAP_IN 0
621 #define RMAP_OUT 1
622 #define RMAP_MAX 2
623
624 #include "filter.h"
625
626 /* BGP filter structure. */
627 struct bgp_filter {
628 /* Distribute-list. */
629 struct {
630 char *name;
631 struct access_list *alist;
632 } dlist[FILTER_MAX];
633
634 /* Prefix-list. */
635 struct {
636 char *name;
637 struct prefix_list *plist;
638 } plist[FILTER_MAX];
639
640 /* Filter-list. */
641 struct {
642 char *name;
643 struct as_list *aslist;
644 } aslist[FILTER_MAX];
645
646 /* Route-map. */
647 struct {
648 char *name;
649 struct route_map *map;
650 } map[RMAP_MAX];
651
652 /* Unsuppress-map. */
653 struct {
654 char *name;
655 struct route_map *map;
656 } usmap;
657 };
658
659 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
660 a peer who's AS is part of our Confederation. */
661 typedef enum {
662 BGP_PEER_UNSPECIFIED,
663 BGP_PEER_IBGP,
664 BGP_PEER_EBGP,
665 BGP_PEER_INTERNAL,
666 BGP_PEER_CONFED,
667 } bgp_peer_sort_t;
668
669 /* BGP message header and packet size. */
670 #define BGP_MARKER_SIZE 16
671 #define BGP_HEADER_SIZE 19
672 #define BGP_MAX_PACKET_SIZE 4096
673 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
674
675 /*
676 * Trigger delay for bgp_announce_route().
677 */
678 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
679 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
680
681 struct peer_af {
682 /* back pointer to the peer */
683 struct peer *peer;
684
685 /* which subgroup the peer_af belongs to */
686 struct update_subgroup *subgroup;
687
688 /* for being part of an update subgroup's peer list */
689 LIST_ENTRY(peer_af) subgrp_train;
690
691 /* for being part of a packet's peer list */
692 LIST_ENTRY(peer_af) pkt_train;
693
694 struct bpacket *next_pkt_to_send;
695
696 /*
697 * Trigger timer for bgp_announce_route().
698 */
699 struct thread *t_announce_route;
700
701 afi_t afi;
702 safi_t safi;
703 int afid;
704 };
705
706 /* BGP neighbor structure. */
707 struct peer {
708 /* BGP structure. */
709 struct bgp *bgp;
710
711 /* reference count, primarily to allow bgp_process'ing of route_node's
712 * to be done after a struct peer is deleted.
713 *
714 * named 'lock' for hysterical reasons within Quagga.
715 */
716 int lock;
717
718 /* BGP peer group. */
719 struct peer_group *group;
720 uint64_t version[AFI_MAX][SAFI_MAX];
721
722 /* BGP peer_af structures, per configured AF on this peer */
723 struct peer_af *peer_af_array[BGP_AF_MAX];
724
725 /* Peer's remote AS number. */
726 int as_type;
727 as_t as;
728
729 /* Peer's local AS number. */
730 as_t local_as;
731
732 bgp_peer_sort_t sort;
733
734 /* Peer's Change local AS number. */
735 as_t change_local_as;
736
737 /* Remote router ID. */
738 struct in_addr remote_id;
739
740 /* Local router ID. */
741 struct in_addr local_id;
742
743 /* Packet receive and send buffer. */
744 pthread_mutex_t io_mtx; // guards ibuf, obuf
745 struct stream_fifo *ibuf; // packets waiting to be processed
746 struct stream_fifo *obuf; // packets waiting to be written
747
748 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
749 struct stream *obuf_work; // WiP buffer used to construct packets
750
751 struct stream *curr; // the current packet being parsed
752
753 /* We use a separate stream to encode MP_REACH_NLRI for efficient
754 * NLRI packing. peer->obuf_work stores all the other attributes. The
755 * actual packet is then constructed by concatenating the two.
756 */
757 struct stream *scratch;
758
759 /* the doppelganger peer structure, due to dual TCP conn setup */
760 struct peer *doppelganger;
761
762 /* Status of the peer. */
763 int status;
764 int ostatus;
765
766 /* FSM events, stored for debug purposes.
767 * Note: uchar used for reduced memory usage.
768 */
769 unsigned char cur_event;
770 unsigned char last_event;
771 unsigned char last_major_event;
772
773 /* Peer index, used for dumping TABLE_DUMP_V2 format */
774 uint16_t table_dump_index;
775
776 /* Peer information */
777 int fd; /* File descriptor */
778 int ttl; /* TTL of TCP connection to the peer. */
779 int rtt; /* Estimated round-trip-time from TCP_INFO */
780 int gtsm_hops; /* minimum hopcount to peer */
781 char *desc; /* Description of the peer. */
782 unsigned short port; /* Destination port for peer */
783 char *host; /* Printable address of the peer. */
784 union sockunion su; /* Sockunion address of the peer. */
785 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
786 time_t uptime; /* Last Up/Down time */
787 time_t readtime; /* Last read time */
788 time_t resettime; /* Last reset time */
789
790 char *conf_if; /* neighbor interface config name. */
791 struct interface *ifp; /* corresponding interface */
792 char *ifname; /* bind interface name. */
793 char *update_if;
794 union sockunion *update_source;
795
796 union sockunion *su_local; /* Sockunion of local address. */
797 union sockunion *su_remote; /* Sockunion of remote address. */
798 int shared_network; /* Is this peer shared same network. */
799 struct bgp_nexthop nexthop; /* Nexthop */
800
801 /* Peer address family configuration. */
802 uint8_t afc[AFI_MAX][SAFI_MAX];
803 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
804 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
805 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
806
807 /* Capability flags (reset in bgp_stop) */
808 uint32_t cap;
809 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
810 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
811 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
812 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
813 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
814 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
815 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
816 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
817 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
818 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
819 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
820 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
821 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
822 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
823 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
824 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
825 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
826
827 /* Capability flags (reset in bgp_stop) */
828 uint32_t af_cap[AFI_MAX][SAFI_MAX];
829 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
830 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
831 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
832 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
833 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
834 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
835 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
836 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
837 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
838 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
839 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
840 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
841 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
842 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
843 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
844
845 /* Global configuration flags. */
846 /*
847 * Parallel array to flags that indicates whether each flag originates
848 * from a peer-group or if it is config that is specific to this
849 * individual peer. If a flag is set independent of the peer-group, the
850 * same bit should be set here. If this peer is a peer-group, this
851 * memory region should be all zeros.
852 *
853 * The assumption is that the default state for all flags is unset,
854 * so if a flag is unset, the corresponding override flag is unset too.
855 * However if a flag is set, the corresponding override flag is set.
856 */
857 uint32_t flags_override;
858 /*
859 * Parallel array to flags that indicates whether the default behavior
860 * of *flags_override* should be inverted. If a flag is unset and the
861 * corresponding invert flag is set, the corresponding override flag
862 * would be set. However if a flag is set and the corresponding invert
863 * flag is unset, the corresponding override flag would be unset.
864 *
865 * This can be used for attributes like *send-community*, which are
866 * implicitely enabled and have to be disabled explicitely, compared to
867 * 'normal' attributes like *next-hop-self* which are implicitely set.
868 *
869 * All operations dealing with flags should apply the following boolean
870 * logic to keep the internal flag system in a sane state:
871 *
872 * value=0 invert=0 Inherit flag if member, otherwise unset flag
873 * value=0 invert=1 Unset flag unconditionally
874 * value=1 invert=0 Set flag unconditionally
875 * value=1 invert=1 Inherit flag if member, otherwise set flag
876 *
877 * Contrary to the implementation of *flags_override*, the flag
878 * inversion state can be set either on the peer OR the peer *and* the
879 * peer-group. This was done on purpose, as the inversion state of a
880 * flag can be determined on either the peer or the peer-group.
881 *
882 * Example: Enabling the cisco configuration mode inverts all flags
883 * related to *send-community* unconditionally for both peer-groups and
884 * peers.
885 *
886 * This behavior is different for interface peers though, which enable
887 * the *extended-nexthop* flag by default, which regular peers do not.
888 * As the peer-group can contain both regular and interface peers, the
889 * flag inversion state must be set on the peer only.
890 *
891 * When a peer inherits the configuration from a peer-group and the
892 * inversion state of the flag differs between peer and peer-group, the
893 * newly set value must equal to the inverted state of the peer-group.
894 */
895 uint32_t flags_invert;
896 /*
897 * Effective array for storing the peer/peer-group flags. In case of a
898 * peer-group, the peer-specific overrides (see flags_override and
899 * flags_invert) must be respected.
900 */
901 uint32_t flags;
902 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
903 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
904 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
905 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
906 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
907 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
908 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
909 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
910 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
911 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
912 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
913 #define PEER_FLAG_LONESOUL (1 << 11)
914 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
915 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
916 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
917 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
918 #define PEER_FLAG_ENFORCE_FIRST_AS (1 << 16) /* enforce-first-as */
919 #define PEER_FLAG_ROUTEADV (1 << 17) /* route advertise */
920 #define PEER_FLAG_TIMER (1 << 18) /* keepalive & holdtime */
921 #define PEER_FLAG_TIMER_CONNECT (1 << 19) /* connect timer */
922 #define PEER_FLAG_PASSWORD (1 << 20) /* password */
923 #define PEER_FLAG_LOCAL_AS (1 << 21) /* local-as */
924 #define PEER_FLAG_UPDATE_SOURCE (1 << 22) /* update-source */
925
926 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
927 char *tx_shutdown_message;
928
929 /* NSF mode (graceful restart) */
930 uint8_t nsf[AFI_MAX][SAFI_MAX];
931
932 /* Peer Per AF flags */
933 /*
934 * Please consult the comments for *flags_override*, *flags_invert* and
935 * *flags* to understand what these three arrays do. The address-family
936 * specific attributes are being treated the exact same way as global
937 * peer attributes.
938 */
939 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
940 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
941 uint32_t af_flags[AFI_MAX][SAFI_MAX];
942 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
943 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
944 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
945 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
946 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
947 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
948 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
949 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
950 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
951 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
952 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
953 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
954 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
955 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
956 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
957 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
958 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
959 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
960 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
961 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
962 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
963 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
964 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
965 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
966 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
967
968 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
969
970 /* MD5 password */
971 char *password;
972
973 /* default-originate route-map. */
974 struct {
975 char *name;
976 struct route_map *map;
977 } default_rmap[AFI_MAX][SAFI_MAX];
978
979 /* Peer status flags. */
980 uint16_t sflags;
981 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
982 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
983 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
984 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
985 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
986 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
987 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
988
989 /* Peer status af flags (reset in bgp_stop) */
990 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
991 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
992 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
993 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
994 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
995 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
996 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
997
998 /* Configured timer values. */
999 _Atomic uint32_t holdtime;
1000 _Atomic uint32_t keepalive;
1001 _Atomic uint32_t connect;
1002 _Atomic uint32_t routeadv;
1003
1004 /* Timer values. */
1005 _Atomic uint32_t v_start;
1006 _Atomic uint32_t v_connect;
1007 _Atomic uint32_t v_holdtime;
1008 _Atomic uint32_t v_keepalive;
1009 _Atomic uint32_t v_routeadv;
1010 _Atomic uint32_t v_pmax_restart;
1011 _Atomic uint32_t v_gr_restart;
1012
1013 /* Threads. */
1014 struct thread *t_read;
1015 struct thread *t_write;
1016 struct thread *t_start;
1017 struct thread *t_connect_check_r;
1018 struct thread *t_connect_check_w;
1019 struct thread *t_connect;
1020 struct thread *t_holdtime;
1021 struct thread *t_routeadv;
1022 struct thread *t_pmax_restart;
1023 struct thread *t_gr_restart;
1024 struct thread *t_gr_stale;
1025 struct thread *t_generate_updgrp_packets;
1026 struct thread *t_process_packet;
1027
1028 /* Thread flags. */
1029 _Atomic uint32_t thread_flags;
1030 #define PEER_THREAD_WRITES_ON (1 << 0)
1031 #define PEER_THREAD_READS_ON (1 << 1)
1032 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
1033 /* workqueues */
1034 struct work_queue *clear_node_queue;
1035
1036 #define PEER_TOTAL_RX(peer) \
1037 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1038 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1039 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1040 + atomic_load_explicit(&peer->refresh_in, \
1041 memory_order_relaxed) \
1042 + atomic_load_explicit(&peer->keepalive_in, \
1043 memory_order_relaxed) \
1044 + atomic_load_explicit(&peer->dynamic_cap_in, \
1045 memory_order_relaxed)
1046
1047 #define PEER_TOTAL_TX(peer) \
1048 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1049 + atomic_load_explicit(&peer->update_out, \
1050 memory_order_relaxed) \
1051 + atomic_load_explicit(&peer->notify_out, \
1052 memory_order_relaxed) \
1053 + atomic_load_explicit(&peer->refresh_out, \
1054 memory_order_relaxed) \
1055 + atomic_load_explicit(&peer->keepalive_out, \
1056 memory_order_relaxed) \
1057 + atomic_load_explicit(&peer->dynamic_cap_out, \
1058 memory_order_relaxed)
1059
1060 /* Statistics field */
1061 _Atomic uint32_t open_in; /* Open message input count */
1062 _Atomic uint32_t open_out; /* Open message output count */
1063 _Atomic uint32_t update_in; /* Update message input count */
1064 _Atomic uint32_t update_out; /* Update message ouput count */
1065 _Atomic time_t update_time; /* Update message received time. */
1066 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1067 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1068 _Atomic uint32_t notify_in; /* Notify input count */
1069 _Atomic uint32_t notify_out; /* Notify output count */
1070 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1071 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1072 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1073 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1074
1075 /* BGP state count */
1076 uint32_t established; /* Established */
1077 uint32_t dropped; /* Dropped */
1078
1079 /* Update delay related fields */
1080 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1081 for EOR */
1082
1083 /* Syncronization list and time. */
1084 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1085 time_t synctime;
1086 /* timestamp when the last UPDATE msg was written */
1087 _Atomic time_t last_write;
1088 /* timestamp when the last msg was written */
1089 _Atomic time_t last_update;
1090
1091 /* Send prefix count. */
1092 unsigned long scount[AFI_MAX][SAFI_MAX];
1093
1094 /* Notify data. */
1095 struct bgp_notify notify;
1096
1097 /* Filter structure. */
1098 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1099
1100 /*
1101 * Parallel array to filter that indicates whether each filter
1102 * originates from a peer-group or if it is config that is specific to
1103 * this individual peer. If a filter is set independent of the
1104 * peer-group the appropriate bit should be set here. If this peer is a
1105 * peer-group, this memory region should be all zeros. The assumption
1106 * is that the default state for all flags is unset. Due to filters
1107 * having a direction (e.g. in/out/...), this array has a third
1108 * dimension for storing the overrides independently per direction.
1109 *
1110 * Notes:
1111 * - if a filter for an individual peer is unset, the corresponding
1112 * override flag is unset and the peer is considered to be back in
1113 * sync with the peer-group.
1114 * - This does *not* contain the filter values, rather it contains
1115 * whether the filter in filter (struct bgp_filter) is peer-specific.
1116 */
1117 uint8_t filter_override[AFI_MAX][SAFI_MAX][(FILTER_MAX > RMAP_MAX)
1118 ? FILTER_MAX
1119 : RMAP_MAX];
1120 #define PEER_FT_DISTRIBUTE_LIST (1 << 0) /* distribute-list */
1121 #define PEER_FT_FILTER_LIST (1 << 1) /* filter-list */
1122 #define PEER_FT_PREFIX_LIST (1 << 2) /* prefix-list */
1123 #define PEER_FT_ROUTE_MAP (1 << 3) /* route-map */
1124 #define PEER_FT_UNSUPPRESS_MAP (1 << 4) /* unsuppress-map */
1125
1126 /* ORF Prefix-list */
1127 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1128
1129 /* Text description of last attribute rcvd */
1130 char rcvd_attr_str[BUFSIZ];
1131
1132 /* Track if we printed the attribute in debugs */
1133 int rcvd_attr_printed;
1134
1135 /* Prefix count. */
1136 unsigned long pcount[AFI_MAX][SAFI_MAX];
1137
1138 /* Max prefix count. */
1139 unsigned long pmax[AFI_MAX][SAFI_MAX];
1140 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1141 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1142 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1143
1144 /* allowas-in. */
1145 char allowas_in[AFI_MAX][SAFI_MAX];
1146
1147 /* weight */
1148 unsigned long weight[AFI_MAX][SAFI_MAX];
1149
1150 /* peer reset cause */
1151 char last_reset;
1152 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1153 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1154 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1155 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1156 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1157 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1158 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1159 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1160 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1161 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1162 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1163 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1164 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1165 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1166 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1167 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1168 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1169 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1170 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1171 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1172 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1173 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1174 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1175 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1176 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1177 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1178 unsigned long last_reset_cause_size;
1179 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1180
1181 /* The kind of route-map Flags.*/
1182 uint8_t rmap_type;
1183 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1184 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1185 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1186 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1187 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1188 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1189 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1190 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1191
1192 /* peer specific BFD information */
1193 struct bfd_info *bfd_info;
1194
1195 /* hostname and domainname advertised by host */
1196 char *hostname;
1197 char *domainname;
1198
1199 QOBJ_FIELDS
1200 };
1201 DECLARE_QOBJ_TYPE(peer)
1202
1203 /* Inherit peer attribute from peer-group. */
1204 #define PEER_ATTR_INHERIT(peer, group, attr) \
1205 ((peer)->attr = (group)->conf->attr)
1206 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1207 do { \
1208 if ((peer)->attr) \
1209 XFREE(mt, (peer)->attr); \
1210 if ((group)->conf->attr) \
1211 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1212 else \
1213 (peer)->attr = NULL; \
1214 } while (0)
1215 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1216 do { \
1217 if ((peer)->attr) \
1218 sockunion_free((peer)->attr); \
1219 if ((group)->conf->attr) \
1220 (peer)->attr = sockunion_dup((group)->conf->attr); \
1221 else \
1222 (peer)->attr = NULL; \
1223 } while (0)
1224
1225 /* Check if suppress start/restart of sessions to peer. */
1226 #define BGP_PEER_START_SUPPRESSED(P) \
1227 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1228 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1229
1230 #define PEER_PASSWORD_MINLEN (1)
1231 #define PEER_PASSWORD_MAXLEN (80)
1232
1233 /* This structure's member directly points incoming packet data
1234 stream. */
1235 struct bgp_nlri {
1236 /* AFI. */
1237 uint16_t afi; /* iana_afi_t */
1238
1239 /* SAFI. */
1240 uint8_t safi; /* iana_safi_t */
1241
1242 /* Pointer to NLRI byte stream. */
1243 uint8_t *nlri;
1244
1245 /* Length of whole NLRI. */
1246 bgp_size_t length;
1247 };
1248
1249 /* BGP versions. */
1250 #define BGP_VERSION_4 4
1251
1252 /* Default BGP port number. */
1253 #define BGP_PORT_DEFAULT 179
1254
1255 /* BGP minimum message size. */
1256 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1257 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1258 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1259 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1260 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1261 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1262
1263 /* BGP message types. */
1264 #define BGP_MSG_OPEN 1
1265 #define BGP_MSG_UPDATE 2
1266 #define BGP_MSG_NOTIFY 3
1267 #define BGP_MSG_KEEPALIVE 4
1268 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1269 #define BGP_MSG_CAPABILITY 6
1270 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1271
1272 /* BGP open optional parameter. */
1273 #define BGP_OPEN_OPT_AUTH 1
1274 #define BGP_OPEN_OPT_CAP 2
1275
1276 /* BGP4 attribute type codes. */
1277 #define BGP_ATTR_ORIGIN 1
1278 #define BGP_ATTR_AS_PATH 2
1279 #define BGP_ATTR_NEXT_HOP 3
1280 #define BGP_ATTR_MULTI_EXIT_DISC 4
1281 #define BGP_ATTR_LOCAL_PREF 5
1282 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1283 #define BGP_ATTR_AGGREGATOR 7
1284 #define BGP_ATTR_COMMUNITIES 8
1285 #define BGP_ATTR_ORIGINATOR_ID 9
1286 #define BGP_ATTR_CLUSTER_LIST 10
1287 #define BGP_ATTR_DPA 11
1288 #define BGP_ATTR_ADVERTISER 12
1289 #define BGP_ATTR_RCID_PATH 13
1290 #define BGP_ATTR_MP_REACH_NLRI 14
1291 #define BGP_ATTR_MP_UNREACH_NLRI 15
1292 #define BGP_ATTR_EXT_COMMUNITIES 16
1293 #define BGP_ATTR_AS4_PATH 17
1294 #define BGP_ATTR_AS4_AGGREGATOR 18
1295 #define BGP_ATTR_AS_PATHLIMIT 21
1296 #define BGP_ATTR_PMSI_TUNNEL 22
1297 #define BGP_ATTR_ENCAP 23
1298 #define BGP_ATTR_LARGE_COMMUNITIES 32
1299 #define BGP_ATTR_PREFIX_SID 40
1300 #if ENABLE_BGP_VNC_ATTR
1301 #define BGP_ATTR_VNC 255
1302 #endif
1303
1304 /* BGP update origin. */
1305 #define BGP_ORIGIN_IGP 0
1306 #define BGP_ORIGIN_EGP 1
1307 #define BGP_ORIGIN_INCOMPLETE 2
1308
1309 /* BGP notify message codes. */
1310 #define BGP_NOTIFY_HEADER_ERR 1
1311 #define BGP_NOTIFY_OPEN_ERR 2
1312 #define BGP_NOTIFY_UPDATE_ERR 3
1313 #define BGP_NOTIFY_HOLD_ERR 4
1314 #define BGP_NOTIFY_FSM_ERR 5
1315 #define BGP_NOTIFY_CEASE 6
1316 #define BGP_NOTIFY_CAPABILITY_ERR 7
1317
1318 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1319
1320 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1321 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1322 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1323 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1324
1325 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1326 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1327 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1328 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1329 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1330 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1331 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1332 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1333 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1334
1335 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1336 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1337 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1338 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1339 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1340 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1341 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1342 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1343 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1344 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1345 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1346 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1347
1348 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1349 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1350 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1351 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1352 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1353 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1354 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1355 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1356 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1357
1358 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1359 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1360 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1361 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1362
1363 /* BGP finite state machine status. */
1364 #define Idle 1
1365 #define Connect 2
1366 #define Active 3
1367 #define OpenSent 4
1368 #define OpenConfirm 5
1369 #define Established 6
1370 #define Clearing 7
1371 #define Deleted 8
1372 #define BGP_STATUS_MAX 9
1373
1374 /* BGP finite state machine events. */
1375 #define BGP_Start 1
1376 #define BGP_Stop 2
1377 #define TCP_connection_open 3
1378 #define TCP_connection_closed 4
1379 #define TCP_connection_open_failed 5
1380 #define TCP_fatal_error 6
1381 #define ConnectRetry_timer_expired 7
1382 #define Hold_Timer_expired 8
1383 #define KeepAlive_timer_expired 9
1384 #define Receive_OPEN_message 10
1385 #define Receive_KEEPALIVE_message 11
1386 #define Receive_UPDATE_message 12
1387 #define Receive_NOTIFICATION_message 13
1388 #define Clearing_Completed 14
1389 #define BGP_EVENTS_MAX 15
1390
1391 /* BGP timers default value. */
1392 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1393 #define BGP_INIT_START_TIMER 1
1394 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1395 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1396 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1397 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1398 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1399
1400 /* BGP default local preference. */
1401 #define BGP_DEFAULT_LOCAL_PREF 100
1402
1403 /* BGP local-preference to send when 'bgp graceful-shutdown'
1404 * is configured */
1405 #define BGP_GSHUT_LOCAL_PREF 0
1406
1407 /* BGP default subgroup packet queue max . */
1408 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1409
1410 /* BGP graceful restart */
1411 #define BGP_DEFAULT_RESTART_TIME 120
1412 #define BGP_DEFAULT_STALEPATH_TIME 360
1413
1414 /* BGP uptime string length. */
1415 #define BGP_UPTIME_LEN 25
1416
1417 /* Default configuration settings for bgpd. */
1418 #define BGP_VTY_PORT 2605
1419 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1420
1421 /* Check AS path loop when we send NLRI. */
1422 /* #define BGP_SEND_ASPATH_CHECK */
1423
1424 /* BGP Dynamic Neighbors feature */
1425 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1426 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1427 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1428
1429 /* Flag for peer_clear_soft(). */
1430 enum bgp_clear_type {
1431 BGP_CLEAR_SOFT_NONE,
1432 BGP_CLEAR_SOFT_OUT,
1433 BGP_CLEAR_SOFT_IN,
1434 BGP_CLEAR_SOFT_BOTH,
1435 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1436 };
1437
1438 /* Macros. */
1439 #define BGP_INPUT(P) ((P)->curr)
1440 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1441 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1442 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1443
1444 /* BGP error codes. */
1445 #define BGP_SUCCESS 0
1446 #define BGP_ERR_INVALID_VALUE -1
1447 #define BGP_ERR_INVALID_FLAG -2
1448 #define BGP_ERR_INVALID_AS -3
1449 #define BGP_ERR_INVALID_BGP -4
1450 #define BGP_ERR_PEER_GROUP_MEMBER -5
1451 #define BGP_ERR_MULTIPLE_INSTANCE_USED -6
1452 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1453 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1454 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1455 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1456 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET -11
1457 #define BGP_ERR_AS_MISMATCH -12
1458 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1459 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1460 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1461 #define BGP_ERR_NOT_INTERNAL_PEER -16
1462 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1463 #define BGP_ERR_AF_UNCONFIGURED -18
1464 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1465 #define BGP_ERR_INSTANCE_MISMATCH -20
1466 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1467 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1468 #define BGP_ERR_TCPSIG_FAILED -23
1469 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1470 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1471 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1472 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1473 #define BGP_ERR_AS_OVERRIDE -28
1474 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1475 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1476 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1477 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1478 #define BGP_ERR_MAX -33
1479 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1480 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1481
1482 /*
1483 * Enumeration of different policy kinds a peer can be configured with.
1484 */
1485 typedef enum {
1486 BGP_POLICY_ROUTE_MAP,
1487 BGP_POLICY_FILTER_LIST,
1488 BGP_POLICY_PREFIX_LIST,
1489 BGP_POLICY_DISTRIBUTE_LIST,
1490 } bgp_policy_type_e;
1491
1492 /* peer_flag_change_type. */
1493 enum peer_change_type {
1494 peer_change_none,
1495 peer_change_reset,
1496 peer_change_reset_in,
1497 peer_change_reset_out,
1498 };
1499
1500 extern struct bgp_master *bm;
1501 extern unsigned int multipath_num;
1502
1503 /* Prototypes. */
1504 extern void bgp_terminate(void);
1505 extern void bgp_reset(void);
1506 extern time_t bgp_clock(void);
1507 extern void bgp_zclient_reset(void);
1508 extern struct bgp *bgp_get_default(void);
1509 extern struct bgp *bgp_lookup(as_t, const char *);
1510 extern struct bgp *bgp_lookup_by_name(const char *);
1511 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1512 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1513 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1514 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1515 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1516 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1517 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1518 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1519 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1520 union sockunion *,
1521 struct peer_group *);
1522 extern struct prefix *
1523 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1524 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1525 struct prefix *,
1526 struct prefix **);
1527 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1528 union sockunion *);
1529
1530 /*
1531 * Peers are incredibly easy to memory leak
1532 * due to the various ways that they are actually used
1533 * Provide some functionality to debug locks and unlocks
1534 */
1535 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1536 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1537 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1538 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1539
1540 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1541 extern int peer_active(struct peer *);
1542 extern int peer_active_nego(struct peer *);
1543 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1544 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1545 as_t, as_t, int, afi_t, safi_t,
1546 struct peer_group *);
1547 extern struct peer *peer_create_accept(struct bgp *);
1548 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1549 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1550 json_object *json);
1551
1552 extern int bgp_config_write(struct vty *);
1553
1554 extern void bgp_master_init(struct thread_master *master);
1555
1556 extern void bgp_init(unsigned short instance);
1557 extern void bgp_pthreads_run(void);
1558 extern void bgp_pthreads_finish(void);
1559 extern void bgp_route_map_init(void);
1560 extern void bgp_session_reset(struct peer *);
1561
1562 extern int bgp_option_set(int);
1563 extern int bgp_option_unset(int);
1564 extern int bgp_option_check(int);
1565
1566 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1567 extern void bgp_instance_up(struct bgp *);
1568 extern void bgp_instance_down(struct bgp *);
1569 extern int bgp_delete(struct bgp *);
1570
1571 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1572 vrf_id_t old_vrf_id, bool create);
1573
1574 extern int bgp_flag_set(struct bgp *, int);
1575 extern int bgp_flag_unset(struct bgp *, int);
1576 extern int bgp_flag_check(struct bgp *, int);
1577
1578 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1579 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1580
1581 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1582 extern int bgp_cluster_id_unset(struct bgp *);
1583
1584 extern int bgp_confederation_id_set(struct bgp *, as_t);
1585 extern int bgp_confederation_id_unset(struct bgp *);
1586 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1587
1588 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1589 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1590
1591 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1592 extern int bgp_timers_unset(struct bgp *);
1593
1594 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1595 extern int bgp_default_local_preference_unset(struct bgp *);
1596
1597 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1598 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1599
1600 extern int bgp_listen_limit_set(struct bgp *, int);
1601 extern int bgp_listen_limit_unset(struct bgp *);
1602
1603 extern int bgp_update_delay_active(struct bgp *);
1604 extern int bgp_update_delay_configured(struct bgp *);
1605 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1606 extern void peer_as_change(struct peer *, as_t, int);
1607 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1608 int, afi_t, safi_t);
1609 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1610 extern int peer_delete(struct peer *peer);
1611 extern int peer_group_delete(struct peer_group *);
1612 extern int peer_group_remote_as_delete(struct peer_group *);
1613 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1614
1615 extern int peer_activate(struct peer *, afi_t, safi_t);
1616 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1617 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1618
1619 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1620 struct peer_group *, as_t *);
1621
1622 extern int peer_flag_set(struct peer *, uint32_t);
1623 extern int peer_flag_unset(struct peer *, uint32_t);
1624 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1625
1626 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1627 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1628 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1629 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1630 uint32_t flag);
1631 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1632 enum peer_change_type type);
1633
1634 extern int peer_ebgp_multihop_set(struct peer *, int);
1635 extern int peer_ebgp_multihop_unset(struct peer *);
1636 extern int is_ebgp_multihop_configured(struct peer *peer);
1637
1638 extern int peer_description_set(struct peer *, const char *);
1639 extern int peer_description_unset(struct peer *);
1640
1641 extern int peer_update_source_if_set(struct peer *, const char *);
1642 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1643 extern int peer_update_source_unset(struct peer *);
1644
1645 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1646 const char *rmap,
1647 struct route_map *route_map);
1648 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1649
1650 extern int peer_port_set(struct peer *, uint16_t);
1651 extern int peer_port_unset(struct peer *);
1652
1653 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1654 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1655
1656 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1657 uint32_t holdtime);
1658 extern int peer_timers_unset(struct peer *);
1659
1660 extern int peer_timers_connect_set(struct peer *, uint32_t);
1661 extern int peer_timers_connect_unset(struct peer *);
1662
1663 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1664 extern int peer_advertise_interval_unset(struct peer *);
1665
1666 extern void peer_interface_set(struct peer *, const char *);
1667 extern void peer_interface_unset(struct peer *);
1668
1669 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1670 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1671
1672 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1673 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1674
1675 extern int peer_local_as_set(struct peer *, as_t, int, int);
1676 extern int peer_local_as_unset(struct peer *);
1677
1678 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1679 const char *);
1680 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1681
1682 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1683 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1684
1685 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1686 const char *name, struct route_map *route_map);
1687 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1688
1689 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1690 const char *name,
1691 struct route_map *route_map);
1692
1693 extern int peer_password_set(struct peer *, const char *);
1694 extern int peer_password_unset(struct peer *);
1695
1696 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1697
1698 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1699 uint8_t, int, uint16_t);
1700 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1701
1702 extern int peer_clear(struct peer *, struct listnode **);
1703 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1704
1705 extern int peer_ttl_security_hops_set(struct peer *, int);
1706 extern int peer_ttl_security_hops_unset(struct peer *);
1707
1708 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1709 extern int peer_tx_shutdown_message_unset(struct peer *);
1710
1711 extern int bgp_route_map_update_timer(struct thread *thread);
1712 extern void bgp_route_map_terminate(void);
1713
1714 extern int peer_cmp(struct peer *p1, struct peer *p2);
1715
1716 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1717 afi_t *afi, safi_t *safi);
1718 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1719 iana_afi_t *pkt_afi,
1720 iana_safi_t *pkt_safi);
1721
1722 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1723 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1724 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1725
1726 extern void bgp_close(void);
1727 extern void bgp_free(struct bgp *);
1728
1729 static inline struct bgp *bgp_lock(struct bgp *bgp)
1730 {
1731 bgp->lock++;
1732 return bgp;
1733 }
1734
1735 static inline void bgp_unlock(struct bgp *bgp)
1736 {
1737 assert(bgp->lock > 0);
1738 if (--bgp->lock == 0)
1739 bgp_free(bgp);
1740 }
1741
1742 static inline int afindex(afi_t afi, safi_t safi)
1743 {
1744 switch (afi) {
1745 case AFI_IP:
1746 switch (safi) {
1747 case SAFI_UNICAST:
1748 return BGP_AF_IPV4_UNICAST;
1749 break;
1750 case SAFI_MULTICAST:
1751 return BGP_AF_IPV4_MULTICAST;
1752 break;
1753 case SAFI_LABELED_UNICAST:
1754 return BGP_AF_IPV4_LBL_UNICAST;
1755 break;
1756 case SAFI_MPLS_VPN:
1757 return BGP_AF_IPV4_VPN;
1758 break;
1759 case SAFI_ENCAP:
1760 return BGP_AF_IPV4_ENCAP;
1761 break;
1762 case SAFI_FLOWSPEC:
1763 return BGP_AF_IPV4_FLOWSPEC;
1764 default:
1765 return BGP_AF_MAX;
1766 break;
1767 }
1768 break;
1769 case AFI_IP6:
1770 switch (safi) {
1771 case SAFI_UNICAST:
1772 return BGP_AF_IPV6_UNICAST;
1773 break;
1774 case SAFI_MULTICAST:
1775 return BGP_AF_IPV6_MULTICAST;
1776 break;
1777 case SAFI_LABELED_UNICAST:
1778 return BGP_AF_IPV6_LBL_UNICAST;
1779 break;
1780 case SAFI_MPLS_VPN:
1781 return BGP_AF_IPV6_VPN;
1782 break;
1783 case SAFI_ENCAP:
1784 return BGP_AF_IPV6_ENCAP;
1785 break;
1786 case SAFI_FLOWSPEC:
1787 return BGP_AF_IPV6_FLOWSPEC;
1788 default:
1789 return BGP_AF_MAX;
1790 break;
1791 }
1792 break;
1793 case AFI_L2VPN:
1794 switch (safi) {
1795 case SAFI_EVPN:
1796 return BGP_AF_L2VPN_EVPN;
1797 break;
1798 default:
1799 return BGP_AF_MAX;
1800 break;
1801 }
1802 default:
1803 return BGP_AF_MAX;
1804 break;
1805 }
1806 }
1807
1808 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1809 static inline int peer_group_active(struct peer *peer)
1810 {
1811 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1812 return 1;
1813 return 0;
1814 }
1815
1816 /* If peer is negotiated at least one address family return 1. */
1817 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1818 {
1819 if (peer->afc_nego[afi][SAFI_UNICAST]
1820 || peer->afc_nego[afi][SAFI_MULTICAST]
1821 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1822 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1823 || peer->afc_nego[afi][SAFI_ENCAP]
1824 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1825 || peer->afc_nego[afi][SAFI_EVPN])
1826 return 1;
1827 return 0;
1828 }
1829
1830 /* If at least one address family activated for group, return 1. */
1831 static inline int peer_group_af_configured(struct peer_group *group)
1832 {
1833 struct peer *peer = group->conf;
1834
1835 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1836 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1837 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1838 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1839 || peer->afc[AFI_IP6][SAFI_UNICAST]
1840 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1841 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1842 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1843 || peer->afc[AFI_IP6][SAFI_ENCAP]
1844 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1845 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1846 return 1;
1847 return 0;
1848 }
1849
1850 static inline char *timestamp_string(time_t ts)
1851 {
1852 time_t tbuf;
1853 tbuf = time(NULL) - (bgp_clock() - ts);
1854 return ctime(&tbuf);
1855 }
1856
1857 static inline int peer_established(struct peer *peer)
1858 {
1859 if (peer->status == Established)
1860 return 1;
1861 return 0;
1862 }
1863
1864 static inline int peer_dynamic_neighbor(struct peer *peer)
1865 {
1866 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1867 }
1868
1869 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1870 {
1871 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1872 }
1873
1874 /* Lookup VRF for BGP instance based on its type. */
1875 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1876 {
1877 struct vrf *vrf;
1878
1879 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1880 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1881 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1882 vrf = vrf_lookup_by_name(bgp->name);
1883 else
1884 vrf = NULL;
1885
1886 return vrf;
1887 }
1888
1889 /* Link BGP instance to VRF. */
1890 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1891 {
1892 bgp->vrf_id = vrf->vrf_id;
1893 if (vrf->info != (void *)bgp)
1894 vrf->info = (void *)bgp_lock(bgp);
1895 }
1896
1897 /* Unlink BGP instance from VRF. */
1898 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1899 {
1900 if (vrf->info == (void *)bgp) {
1901 vrf->info = NULL;
1902 bgp_unlock(bgp);
1903 }
1904 bgp->vrf_id = VRF_UNKNOWN;
1905 }
1906
1907 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1908
1909 /* For benefit of rfapi */
1910 extern struct peer *peer_new(struct bgp *bgp);
1911 #endif /* _QUAGGA_BGPD_H */
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