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Merge pull request #5355 from AnuradhaKaruppiah/pim-state-machine-fixes
[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 "hook.h"
28 #include "frr_pthread.h"
29 #include "lib/json.h"
30 #include "vrf.h"
31 #include "vty.h"
32 #include "iana_afi.h"
33
34 /* For union sockunion. */
35 #include "queue.h"
36 #include "sockunion.h"
37 #include "routemap.h"
38 #include "linklist.h"
39 #include "defaults.h"
40 #include "bgp_memory.h"
41 #include "bitfield.h"
42 #include "vxlan.h"
43 #include "bgp_labelpool.h"
44 #include "bgp_addpath_types.h"
45
46 #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
47 #define BGP_PEER_MAX_HASH_SIZE 16384
48
49 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
50 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
51
52 struct update_subgroup;
53 struct bpacket;
54 struct bgp_pbr_config;
55
56 /*
57 * Allow the neighbor XXXX remote-as to take internal or external
58 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
59 * behavior
60 * in the system.
61 */
62 enum { AS_UNSPECIFIED = 0,
63 AS_SPECIFIED,
64 AS_INTERNAL,
65 AS_EXTERNAL,
66 };
67
68 /* Typedef BGP specific types. */
69 typedef uint32_t as_t;
70 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
71 typedef uint16_t bgp_size_t;
72
73 #define max(a, b) \
74 ({ \
75 __typeof__(a) _a = (a); \
76 __typeof__(b) _b = (b); \
77 _a > _b ? _a : _b; \
78 })
79
80 enum bgp_af_index {
81 BGP_AF_START,
82 BGP_AF_IPV4_UNICAST = BGP_AF_START,
83 BGP_AF_IPV4_MULTICAST,
84 BGP_AF_IPV4_VPN,
85 BGP_AF_IPV6_UNICAST,
86 BGP_AF_IPV6_MULTICAST,
87 BGP_AF_IPV6_VPN,
88 BGP_AF_IPV4_ENCAP,
89 BGP_AF_IPV6_ENCAP,
90 BGP_AF_L2VPN_EVPN,
91 BGP_AF_IPV4_LBL_UNICAST,
92 BGP_AF_IPV6_LBL_UNICAST,
93 BGP_AF_IPV4_FLOWSPEC,
94 BGP_AF_IPV6_FLOWSPEC,
95 BGP_AF_MAX
96 };
97
98 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
99
100 #define FOREACH_AFI_SAFI(afi, safi) \
101 for (afi = AFI_IP; afi < AFI_MAX; afi++) \
102 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
103
104 #define FOREACH_SAFI(safi) \
105 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
106
107 extern struct frr_pthread *bgp_pth_io;
108 extern struct frr_pthread *bgp_pth_ka;
109
110 /* BGP master for system wide configurations and variables. */
111 struct bgp_master {
112 /* BGP instance list. */
113 struct list *bgp;
114
115 /* BGP thread master. */
116 struct thread_master *master;
117
118 /* work queues */
119 struct work_queue *process_main_queue;
120
121 /* Listening sockets */
122 struct list *listen_sockets;
123
124 /* BGP port number. */
125 uint16_t port;
126
127 /* Listener address */
128 char *address;
129
130 /* The Mac table */
131 struct hash *self_mac_hash;
132
133 /* BGP start time. */
134 time_t start_time;
135
136 /* Various BGP global configuration. */
137 uint8_t options;
138 #define BGP_OPT_NO_FIB (1 << 0)
139 #define BGP_OPT_NO_LISTEN (1 << 1)
140 #define BGP_OPT_NO_ZEBRA (1 << 2)
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 /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
157 struct bgp* bgp_evpn;
158
159 /* How big should we set the socket buffer size */
160 uint32_t socket_buffer;
161
162 bool terminating; /* global flag that sigint terminate seen */
163 QOBJ_FIELDS
164 };
165 DECLARE_QOBJ_TYPE(bgp_master)
166
167 /* BGP route-map structure. */
168 struct bgp_rmap {
169 char *name;
170 struct route_map *map;
171 };
172
173 struct bgp_redist {
174 unsigned short instance;
175
176 /* BGP redistribute metric configuration. */
177 uint8_t redist_metric_flag;
178 uint32_t redist_metric;
179
180 /* BGP redistribute route-map. */
181 struct bgp_rmap rmap;
182 };
183
184 typedef enum {
185 BGP_VPN_POLICY_DIR_FROMVPN = 0,
186 BGP_VPN_POLICY_DIR_TOVPN = 1,
187 BGP_VPN_POLICY_DIR_MAX = 2
188 } vpn_policy_direction_t;
189
190 struct vpn_policy {
191 struct bgp *bgp; /* parent */
192 afi_t afi;
193 struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
194 struct ecommunity *import_redirect_rtlist;
195 char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
196 struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
197
198 /* should be mpls_label_t? */
199 uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
200 uint32_t tovpn_zebra_vrf_label_last_sent;
201 struct prefix_rd tovpn_rd;
202 struct prefix tovpn_nexthop; /* unset => set to 0 */
203 uint32_t flags;
204 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
205 #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
206 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
207
208 /*
209 * If we are importing another vrf into us keep a list of
210 * vrf names that are being imported into us.
211 */
212 struct list *import_vrf;
213
214 /*
215 * if we are being exported to another vrf keep a list of
216 * vrf names that we are being exported to.
217 */
218 struct list *export_vrf;
219 };
220
221 /*
222 * Type of 'struct bgp'.
223 * - Default: The default instance
224 * - VRF: A specific (non-default) VRF
225 * - View: An instance used for route exchange
226 * The "default" instance is treated separately to simplify the code. Note
227 * that if deployed in a Multi-VRF environment, it may not exist.
228 */
229 enum bgp_instance_type {
230 BGP_INSTANCE_TYPE_DEFAULT,
231 BGP_INSTANCE_TYPE_VRF,
232 BGP_INSTANCE_TYPE_VIEW
233 };
234
235 /* BGP instance structure. */
236 struct bgp {
237 /* AS number of this BGP instance. */
238 as_t as;
239
240 /* Name of this BGP instance. */
241 char *name;
242 char *name_pretty; /* printable "VRF|VIEW name|default" */
243
244 /* Type of instance and VRF id. */
245 enum bgp_instance_type inst_type;
246 vrf_id_t vrf_id;
247
248 /* Reference count to allow peer_delete to finish after bgp_delete */
249 int lock;
250
251 /* Self peer. */
252 struct peer *peer_self;
253
254 /* BGP peer. */
255 struct list *peer;
256 struct hash *peerhash;
257
258 /* BGP peer group. */
259 struct list *group;
260
261 /* The maximum number of BGP dynamic neighbors that can be created */
262 int dynamic_neighbors_limit;
263
264 /* The current number of BGP dynamic neighbors */
265 int dynamic_neighbors_count;
266
267 struct hash *update_groups[BGP_AF_MAX];
268
269 /*
270 * Global statistics for update groups.
271 */
272 struct {
273 uint32_t join_events;
274 uint32_t prune_events;
275 uint32_t merge_events;
276 uint32_t split_events;
277 uint32_t updgrp_switch_events;
278 uint32_t peer_refreshes_combined;
279 uint32_t adj_count;
280 uint32_t merge_checks_triggered;
281
282 uint32_t updgrps_created;
283 uint32_t updgrps_deleted;
284 uint32_t subgrps_created;
285 uint32_t subgrps_deleted;
286 } update_group_stats;
287
288 /* BGP configuration. */
289 uint16_t config;
290 #define BGP_CONFIG_CLUSTER_ID (1 << 0)
291 #define BGP_CONFIG_CONFEDERATION (1 << 1)
292
293 /* BGP router identifier. */
294 struct in_addr router_id;
295 struct in_addr router_id_static;
296 struct in_addr router_id_zebra;
297
298 /* BGP route reflector cluster ID. */
299 struct in_addr cluster_id;
300
301 /* BGP confederation information. */
302 as_t confed_id;
303 as_t *confed_peers;
304 int confed_peers_cnt;
305
306 struct thread
307 *t_startup; /* start-up timer on only once at the beginning */
308
309 uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
310 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
311 uint32_t maxmed_onstartup_value; /* Max-med value when active on
312 start-up */
313 struct thread
314 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
315 uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
316
317 uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
318 #define BGP_MAXMED_ADMIN_UNCONFIGURED 0 /* Off by default */
319 uint32_t maxmed_admin_value; /* Max-med value when administrative in on
320 */
321 #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
322
323 uint8_t maxmed_active; /* 1/0 if max-med is active or not */
324 uint32_t maxmed_value; /* Max-med value when its active */
325
326 /* BGP update delay on startup */
327 struct thread *t_update_delay;
328 struct thread *t_establish_wait;
329 uint8_t update_delay_over;
330 uint8_t main_zebra_update_hold;
331 uint8_t main_peers_update_hold;
332 uint16_t v_update_delay;
333 uint16_t v_establish_wait;
334 char update_delay_begin_time[64];
335 char update_delay_end_time[64];
336 char update_delay_zebra_resume_time[64];
337 char update_delay_peers_resume_time[64];
338 uint32_t established;
339 uint32_t restarted_peers;
340 uint32_t implicit_eors;
341 uint32_t explicit_eors;
342 #define BGP_UPDATE_DELAY_DEF 0
343 #define BGP_UPDATE_DELAY_MIN 0
344 #define BGP_UPDATE_DELAY_MAX 3600
345
346 /* BGP flags. */
347 uint32_t flags;
348 #define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
349 #define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
350 #define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
351 #define BGP_FLAG_MED_CONFED (1 << 3)
352 #define BGP_FLAG_NO_DEFAULT_IPV4 (1 << 4)
353 #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 5)
354 #define BGP_FLAG_COMPARE_ROUTER_ID (1 << 7)
355 #define BGP_FLAG_ASPATH_IGNORE (1 << 8)
356 #define BGP_FLAG_IMPORT_CHECK (1 << 9)
357 #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 10)
358 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 11)
359 #define BGP_FLAG_GRACEFUL_RESTART (1 << 12)
360 #define BGP_FLAG_ASPATH_CONFED (1 << 13)
361 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 14)
362 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
363 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
364 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 17)
365 #define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 18)
366 #define BGP_FLAG_SHOW_HOSTNAME (1 << 19)
367 #define BGP_FLAG_GR_PRESERVE_FWD (1 << 20)
368 #define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 21)
369 #define BGP_FLAG_DELETE_IN_PROGRESS (1 << 22)
370
371 /* BGP Per AF flags */
372 uint16_t af_flags[AFI_MAX][SAFI_MAX];
373 #define BGP_CONFIG_DAMPENING (1 << 0)
374 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
375 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST (1 << 1)
376 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST (1 << 2)
377 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 3)
378 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 4)
379 /* import/export between address families */
380 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 5)
381 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 6)
382 /* vrf-route leaking flags */
383 #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 7)
384 #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 8)
385
386 /* BGP per AF peer count */
387 uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
388
389 /* Route table for next-hop lookup cache. */
390 struct bgp_table *nexthop_cache_table[AFI_MAX];
391
392 /* Route table for import-check */
393 struct bgp_table *import_check_table[AFI_MAX];
394
395 struct bgp_table *connected_table[AFI_MAX];
396
397 struct hash *address_hash;
398
399 /* DB for all local tunnel-ips - used mainly for martian checks
400 Currently it only has all VxLan tunnel IPs*/
401 struct hash *tip_hash;
402
403 /* Static route configuration. */
404 struct bgp_table *route[AFI_MAX][SAFI_MAX];
405
406 /* Aggregate address configuration. */
407 struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
408
409 /* BGP routing information base. */
410 struct bgp_table *rib[AFI_MAX][SAFI_MAX];
411
412 /* BGP table route-map. */
413 struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
414
415 /* BGP redistribute configuration. */
416 struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
417
418 /* Allocate MPLS labels */
419 uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
420
421 /* Allocate hash entries to store policy routing information
422 * The hash are used to host pbr rules somewhere.
423 * Actually, pbr will only be used by flowspec
424 * those hash elements will have relationship together as
425 * illustrated in below diagram:
426 *
427 * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
428 * <----- pbr_match j <--- pbr_match_entry 1..m
429 * <----- pbr_rule k
430 *
431 * - here in BGP structure, the list of match and actions will
432 * stand for the list of ipset sets, and table_ids in the kernel
433 * - the arrow above between pbr_match and pbr_action indicate
434 * that a backpointer permits match to find the action
435 * - the arrow betwen match_entry and match is a hash list
436 * contained in match, that lists the whole set of entries
437 */
438 struct hash *pbr_match_hash;
439 struct hash *pbr_rule_hash;
440 struct hash *pbr_action_hash;
441
442 /* timer to re-evaluate neighbor default-originate route-maps */
443 struct thread *t_rmap_def_originate_eval;
444 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
445
446 /* BGP distance configuration. */
447 uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
448 uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
449 uint8_t distance_local[AFI_MAX][SAFI_MAX];
450
451 /* BGP default local-preference. */
452 uint32_t default_local_pref;
453
454 /* BGP default subgroup pkt queue max */
455 uint32_t default_subgroup_pkt_queue_max;
456
457 /* BGP default timer. */
458 uint32_t default_holdtime;
459 uint32_t default_keepalive;
460 uint32_t default_connect_retry;
461
462 /* BGP graceful restart */
463 uint32_t restart_time;
464 uint32_t stalepath_time;
465
466 /* Maximum-paths configuration */
467 struct bgp_maxpaths_cfg {
468 uint16_t maxpaths_ebgp;
469 uint16_t maxpaths_ibgp;
470 uint16_t ibgp_flags;
471 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
472 } maxpaths[AFI_MAX][SAFI_MAX];
473
474 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
475 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
476
477 /* Automatic coalesce adjust on/off */
478 bool heuristic_coalesce;
479 /* Actual coalesce time */
480 uint32_t coalesce_time;
481
482 /* Auto-shutdown new peers */
483 bool autoshutdown;
484
485 struct bgp_addpath_bgp_data tx_addpath;
486
487 #if ENABLE_BGP_VNC
488 struct rfapi_cfg *rfapi_cfg;
489 struct rfapi *rfapi;
490 #endif
491
492 /* EVPN related information */
493
494 /* EVI hash table */
495 struct hash *vnihash;
496
497 /* EVPN enable - advertise gateway macip routes */
498 int advertise_gw_macip;
499
500 /* EVPN enable - advertise local VNIs and their MACs etc. */
501 int advertise_all_vni;
502
503 /* RFC 8212 - prevent route leaks. */
504 int ebgp_requires_policy;
505 #define DEFAULT_EBGP_POLICY_DISABLED 0
506 #define DEFAULT_EBGP_POLICY_ENABLED 1
507
508 /* draft-ietf-idr-deprecate-as-set-confed-set
509 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
510 */
511 bool reject_as_sets;
512 #define BGP_REJECT_AS_SETS_DISABLED 0
513 #define BGP_REJECT_AS_SETS_ENABLED 1
514
515 struct bgp_evpn_info *evpn_info;
516
517 /* EVPN - use RFC 8365 to auto-derive RT */
518 int advertise_autort_rfc8365;
519
520 /*
521 * Flooding mechanism for BUM packets for VxLAN-EVPN.
522 */
523 enum vxlan_flood_control vxlan_flood_ctrl;
524
525 /* Hash table of Import RTs to EVIs */
526 struct hash *import_rt_hash;
527
528 /* Hash table of VRF import RTs to VRFs */
529 struct hash *vrf_import_rt_hash;
530
531 /* L3-VNI corresponding to this vrf */
532 vni_t l3vni;
533
534 /* router-mac to be used in mac-ip routes for this vrf */
535 struct ethaddr rmac;
536
537 /* originator ip - to be used as NH for type-5 routes */
538 struct in_addr originator_ip;
539
540 /* SVI associated with the L3-VNI corresponding to this vrf */
541 ifindex_t l3vni_svi_ifindex;
542
543 /* vrf flags */
544 uint32_t vrf_flags;
545 #define BGP_VRF_AUTO (1 << 0)
546 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
547 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
548 #define BGP_VRF_RD_CFGD (1 << 3)
549 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
550
551
552 /* unique ID for auto derivation of RD for this vrf */
553 uint16_t vrf_rd_id;
554
555 /* Automatically derived RD for this VRF */
556 struct prefix_rd vrf_prd_auto;
557
558 /* RD for this VRF */
559 struct prefix_rd vrf_prd;
560
561 /* import rt list for the vrf instance */
562 struct list *vrf_import_rtl;
563
564 /* export rt list for the vrf instance */
565 struct list *vrf_export_rtl;
566
567 /* list of corresponding l2vnis (struct bgpevpn) */
568 struct list *l2vnis;
569
570 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
571 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
572
573 struct vpn_policy vpn_policy[AFI_MAX];
574
575 struct bgp_pbr_config *bgp_pbr_cfg;
576
577 /* local esi hash table */
578 struct hash *esihash;
579
580 /* Count of peers in established state */
581 uint32_t established_peers;
582
583 QOBJ_FIELDS
584 };
585 DECLARE_QOBJ_TYPE(bgp)
586
587 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
588 DECLARE_HOOK(bgp_inst_config_write,
589 (struct bgp *bgp, struct vty *vty),
590 (bgp, vty))
591
592 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
593
594 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
595 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
596 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
597 && bgp->vrf_id != VRF_UNKNOWN))
598
599 /* BGP peer-group support. */
600 struct peer_group {
601 /* Name of the peer-group. */
602 char *name;
603
604 /* Pointer to BGP. */
605 struct bgp *bgp;
606
607 /* Peer-group client list. */
608 struct list *peer;
609
610 /** Dynamic neighbor listening ranges */
611 struct list *listen_range[AFI_MAX];
612
613 /* Peer-group config */
614 struct peer *conf;
615 };
616
617 /* BGP Notify message format. */
618 struct bgp_notify {
619 uint8_t code;
620 uint8_t subcode;
621 char *data;
622 bgp_size_t length;
623 uint8_t *raw_data;
624 };
625
626 /* Next hop self address. */
627 struct bgp_nexthop {
628 struct interface *ifp;
629 struct in_addr v4;
630 struct in6_addr v6_global;
631 struct in6_addr v6_local;
632 };
633
634 /* BGP addpath values */
635 #define BGP_ADDPATH_RX 1
636 #define BGP_ADDPATH_TX 2
637 #define BGP_ADDPATH_ID_LEN 4
638
639 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
640
641 /* Route map direction */
642 #define RMAP_IN 0
643 #define RMAP_OUT 1
644 #define RMAP_MAX 2
645
646 #define BGP_DEFAULT_TTL 1
647
648 #include "filter.h"
649
650 /* BGP filter structure. */
651 struct bgp_filter {
652 /* Distribute-list. */
653 struct {
654 char *name;
655 struct access_list *alist;
656 } dlist[FILTER_MAX];
657
658 /* Prefix-list. */
659 struct {
660 char *name;
661 struct prefix_list *plist;
662 } plist[FILTER_MAX];
663
664 /* Filter-list. */
665 struct {
666 char *name;
667 struct as_list *aslist;
668 } aslist[FILTER_MAX];
669
670 /* Route-map. */
671 struct {
672 char *name;
673 struct route_map *map;
674 } map[RMAP_MAX];
675
676 /* Unsuppress-map. */
677 struct {
678 char *name;
679 struct route_map *map;
680 } usmap;
681 };
682
683 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
684 a peer who's AS is part of our Confederation. */
685 typedef enum {
686 BGP_PEER_UNSPECIFIED,
687 BGP_PEER_IBGP,
688 BGP_PEER_EBGP,
689 BGP_PEER_INTERNAL,
690 BGP_PEER_CONFED,
691 } bgp_peer_sort_t;
692
693 /* BGP message header and packet size. */
694 #define BGP_MARKER_SIZE 16
695 #define BGP_HEADER_SIZE 19
696 #define BGP_MAX_PACKET_SIZE 4096
697 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
698
699 /*
700 * Trigger delay for bgp_announce_route().
701 */
702 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
703 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
704
705 struct peer_af {
706 /* back pointer to the peer */
707 struct peer *peer;
708
709 /* which subgroup the peer_af belongs to */
710 struct update_subgroup *subgroup;
711
712 /* for being part of an update subgroup's peer list */
713 LIST_ENTRY(peer_af) subgrp_train;
714
715 /* for being part of a packet's peer list */
716 LIST_ENTRY(peer_af) pkt_train;
717
718 struct bpacket *next_pkt_to_send;
719
720 /*
721 * Trigger timer for bgp_announce_route().
722 */
723 struct thread *t_announce_route;
724
725 afi_t afi;
726 safi_t safi;
727 int afid;
728 };
729
730 /* BGP neighbor structure. */
731 struct peer {
732 /* BGP structure. */
733 struct bgp *bgp;
734
735 /* reference count, primarily to allow bgp_process'ing of route_node's
736 * to be done after a struct peer is deleted.
737 *
738 * named 'lock' for hysterical reasons within Quagga.
739 */
740 int lock;
741
742 /* BGP peer group. */
743 struct peer_group *group;
744 uint64_t version[AFI_MAX][SAFI_MAX];
745
746 /* BGP peer_af structures, per configured AF on this peer */
747 struct peer_af *peer_af_array[BGP_AF_MAX];
748
749 /* Peer's remote AS number. */
750 int as_type;
751 as_t as;
752
753 /* Peer's local AS number. */
754 as_t local_as;
755
756 bgp_peer_sort_t sort;
757
758 /* Peer's Change local AS number. */
759 as_t change_local_as;
760
761 /* Remote router ID. */
762 struct in_addr remote_id;
763
764 /* Local router ID. */
765 struct in_addr local_id;
766
767 /* Packet receive and send buffer. */
768 pthread_mutex_t io_mtx; // guards ibuf, obuf
769 struct stream_fifo *ibuf; // packets waiting to be processed
770 struct stream_fifo *obuf; // packets waiting to be written
771
772 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
773 struct stream *obuf_work; // WiP buffer used to construct packets
774
775 struct stream *curr; // the current packet being parsed
776
777 /* We use a separate stream to encode MP_REACH_NLRI for efficient
778 * NLRI packing. peer->obuf_work stores all the other attributes. The
779 * actual packet is then constructed by concatenating the two.
780 */
781 struct stream *scratch;
782
783 /* the doppelganger peer structure, due to dual TCP conn setup */
784 struct peer *doppelganger;
785
786 /* Status of the peer. */
787 int status;
788 int ostatus;
789
790 /* FSM events, stored for debug purposes.
791 * Note: uchar used for reduced memory usage.
792 */
793 unsigned char cur_event;
794 unsigned char last_event;
795 unsigned char last_major_event;
796
797 /* Peer index, used for dumping TABLE_DUMP_V2 format */
798 uint16_t table_dump_index;
799
800 /* Peer information */
801 int fd; /* File descriptor */
802 int ttl; /* TTL of TCP connection to the peer. */
803 int rtt; /* Estimated round-trip-time from TCP_INFO */
804 int gtsm_hops; /* minimum hopcount to peer */
805 char *desc; /* Description of the peer. */
806 unsigned short port; /* Destination port for peer */
807 char *host; /* Printable address of the peer. */
808 union sockunion su; /* Sockunion address of the peer. */
809 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
810 time_t uptime; /* Last Up/Down time */
811 time_t readtime; /* Last read time */
812 time_t resettime; /* Last reset time */
813
814 char *conf_if; /* neighbor interface config name. */
815 struct interface *ifp; /* corresponding interface */
816 char *ifname; /* bind interface name. */
817 char *update_if;
818 union sockunion *update_source;
819
820 union sockunion *su_local; /* Sockunion of local address. */
821 union sockunion *su_remote; /* Sockunion of remote address. */
822 int shared_network; /* Is this peer shared same network. */
823 struct bgp_nexthop nexthop; /* Nexthop */
824
825 /* Peer address family configuration. */
826 uint8_t afc[AFI_MAX][SAFI_MAX];
827 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
828 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
829 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
830
831 /* Capability flags (reset in bgp_stop) */
832 uint32_t cap;
833 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
834 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
835 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
836 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
837 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
838 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
839 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
840 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
841 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
842 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
843 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
844 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
845 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
846 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
847 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
848 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
849 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
850
851 /* Capability flags (reset in bgp_stop) */
852 uint32_t af_cap[AFI_MAX][SAFI_MAX];
853 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
854 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
855 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
856 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
857 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
858 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
859 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
860 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
861 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
862 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
863 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
864 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
865 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
866 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
867 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
868
869 /* Global configuration flags. */
870 /*
871 * Parallel array to flags that indicates whether each flag originates
872 * from a peer-group or if it is config that is specific to this
873 * individual peer. If a flag is set independent of the peer-group, the
874 * same bit should be set here. If this peer is a peer-group, this
875 * memory region should be all zeros.
876 *
877 * The assumption is that the default state for all flags is unset,
878 * so if a flag is unset, the corresponding override flag is unset too.
879 * However if a flag is set, the corresponding override flag is set.
880 */
881 uint32_t flags_override;
882 /*
883 * Parallel array to flags that indicates whether the default behavior
884 * of *flags_override* should be inverted. If a flag is unset and the
885 * corresponding invert flag is set, the corresponding override flag
886 * would be set. However if a flag is set and the corresponding invert
887 * flag is unset, the corresponding override flag would be unset.
888 *
889 * This can be used for attributes like *send-community*, which are
890 * implicitely enabled and have to be disabled explicitely, compared to
891 * 'normal' attributes like *next-hop-self* which are implicitely set.
892 *
893 * All operations dealing with flags should apply the following boolean
894 * logic to keep the internal flag system in a sane state:
895 *
896 * value=0 invert=0 Inherit flag if member, otherwise unset flag
897 * value=0 invert=1 Unset flag unconditionally
898 * value=1 invert=0 Set flag unconditionally
899 * value=1 invert=1 Inherit flag if member, otherwise set flag
900 *
901 * Contrary to the implementation of *flags_override*, the flag
902 * inversion state can be set either on the peer OR the peer *and* the
903 * peer-group. This was done on purpose, as the inversion state of a
904 * flag can be determined on either the peer or the peer-group.
905 *
906 * Example: Enabling the cisco configuration mode inverts all flags
907 * related to *send-community* unconditionally for both peer-groups and
908 * peers.
909 *
910 * This behavior is different for interface peers though, which enable
911 * the *extended-nexthop* flag by default, which regular peers do not.
912 * As the peer-group can contain both regular and interface peers, the
913 * flag inversion state must be set on the peer only.
914 *
915 * When a peer inherits the configuration from a peer-group and the
916 * inversion state of the flag differs between peer and peer-group, the
917 * newly set value must equal to the inverted state of the peer-group.
918 */
919 uint32_t flags_invert;
920 /*
921 * Effective array for storing the peer/peer-group flags. In case of a
922 * peer-group, the peer-specific overrides (see flags_override and
923 * flags_invert) must be respected.
924 */
925 uint32_t flags;
926 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
927 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
928 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
929 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
930 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
931 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
932 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
933 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
934 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
935 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
936 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
937 #define PEER_FLAG_LONESOUL (1 << 11)
938 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
939 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
940 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
941 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
942 #define PEER_FLAG_ENFORCE_FIRST_AS (1 << 16) /* enforce-first-as */
943 #define PEER_FLAG_ROUTEADV (1 << 17) /* route advertise */
944 #define PEER_FLAG_TIMER (1 << 18) /* keepalive & holdtime */
945 #define PEER_FLAG_TIMER_CONNECT (1 << 19) /* connect timer */
946 #define PEER_FLAG_PASSWORD (1 << 20) /* password */
947 #define PEER_FLAG_LOCAL_AS (1 << 21) /* local-as */
948 #define PEER_FLAG_UPDATE_SOURCE (1 << 22) /* update-source */
949
950 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
951 char *tx_shutdown_message;
952
953 /* NSF mode (graceful restart) */
954 uint8_t nsf[AFI_MAX][SAFI_MAX];
955
956 /* Peer Per AF flags */
957 /*
958 * Please consult the comments for *flags_override*, *flags_invert* and
959 * *flags* to understand what these three arrays do. The address-family
960 * specific attributes are being treated the exact same way as global
961 * peer attributes.
962 */
963 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
964 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
965 uint32_t af_flags[AFI_MAX][SAFI_MAX];
966 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
967 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
968 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
969 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
970 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
971 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
972 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
973 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
974 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
975 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
976 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
977 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
978 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
979 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
980 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
981 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
982 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
983 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
984 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
985 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
986 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
987 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
988 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
989 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
990 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
991
992 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
993
994 /* MD5 password */
995 char *password;
996
997 /* default-originate route-map. */
998 struct {
999 char *name;
1000 struct route_map *map;
1001 } default_rmap[AFI_MAX][SAFI_MAX];
1002
1003 /* Peer status flags. */
1004 uint16_t sflags;
1005 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
1006 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
1007 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
1008 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
1009 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
1010 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
1011 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
1012
1013 /* Peer status af flags (reset in bgp_stop) */
1014 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1015 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
1016 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
1017 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
1018 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
1019 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
1020 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
1021
1022 /* Configured timer values. */
1023 _Atomic uint32_t holdtime;
1024 _Atomic uint32_t keepalive;
1025 _Atomic uint32_t connect;
1026 _Atomic uint32_t routeadv;
1027
1028 /* Timer values. */
1029 _Atomic uint32_t v_start;
1030 _Atomic uint32_t v_connect;
1031 _Atomic uint32_t v_holdtime;
1032 _Atomic uint32_t v_keepalive;
1033 _Atomic uint32_t v_routeadv;
1034 _Atomic uint32_t v_pmax_restart;
1035 _Atomic uint32_t v_gr_restart;
1036
1037 /* Threads. */
1038 struct thread *t_read;
1039 struct thread *t_write;
1040 struct thread *t_start;
1041 struct thread *t_connect_check_r;
1042 struct thread *t_connect_check_w;
1043 struct thread *t_connect;
1044 struct thread *t_holdtime;
1045 struct thread *t_routeadv;
1046 struct thread *t_pmax_restart;
1047 struct thread *t_gr_restart;
1048 struct thread *t_gr_stale;
1049 struct thread *t_generate_updgrp_packets;
1050 struct thread *t_process_packet;
1051
1052 /* Thread flags. */
1053 _Atomic uint32_t thread_flags;
1054 #define PEER_THREAD_WRITES_ON (1 << 0)
1055 #define PEER_THREAD_READS_ON (1 << 1)
1056 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
1057 /* workqueues */
1058 struct work_queue *clear_node_queue;
1059
1060 #define PEER_TOTAL_RX(peer) \
1061 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1062 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1063 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1064 + atomic_load_explicit(&peer->refresh_in, \
1065 memory_order_relaxed) \
1066 + atomic_load_explicit(&peer->keepalive_in, \
1067 memory_order_relaxed) \
1068 + atomic_load_explicit(&peer->dynamic_cap_in, \
1069 memory_order_relaxed)
1070
1071 #define PEER_TOTAL_TX(peer) \
1072 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1073 + atomic_load_explicit(&peer->update_out, \
1074 memory_order_relaxed) \
1075 + atomic_load_explicit(&peer->notify_out, \
1076 memory_order_relaxed) \
1077 + atomic_load_explicit(&peer->refresh_out, \
1078 memory_order_relaxed) \
1079 + atomic_load_explicit(&peer->keepalive_out, \
1080 memory_order_relaxed) \
1081 + atomic_load_explicit(&peer->dynamic_cap_out, \
1082 memory_order_relaxed)
1083
1084 /* Statistics field */
1085 _Atomic uint32_t open_in; /* Open message input count */
1086 _Atomic uint32_t open_out; /* Open message output count */
1087 _Atomic uint32_t update_in; /* Update message input count */
1088 _Atomic uint32_t update_out; /* Update message ouput count */
1089 _Atomic time_t update_time; /* Update message received time. */
1090 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1091 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1092 _Atomic uint32_t notify_in; /* Notify input count */
1093 _Atomic uint32_t notify_out; /* Notify output count */
1094 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1095 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1096 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1097 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1098
1099 uint32_t stat_pfx_filter;
1100 uint32_t stat_pfx_aspath_loop;
1101 uint32_t stat_pfx_originator_loop;
1102 uint32_t stat_pfx_cluster_loop;
1103 uint32_t stat_pfx_nh_invalid;
1104 uint32_t stat_pfx_dup_withdraw;
1105 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1106
1107 /* BGP state count */
1108 uint32_t established; /* Established */
1109 uint32_t dropped; /* Dropped */
1110
1111 /* Update delay related fields */
1112 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1113 for EOR */
1114
1115 /* Syncronization list and time. */
1116 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1117 time_t synctime;
1118 /* timestamp when the last UPDATE msg was written */
1119 _Atomic time_t last_write;
1120 /* timestamp when the last msg was written */
1121 _Atomic time_t last_update;
1122
1123 /* Send prefix count. */
1124 unsigned long scount[AFI_MAX][SAFI_MAX];
1125
1126 /* Notify data. */
1127 struct bgp_notify notify;
1128
1129 /* Filter structure. */
1130 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1131
1132 /*
1133 * Parallel array to filter that indicates whether each filter
1134 * originates from a peer-group or if it is config that is specific to
1135 * this individual peer. If a filter is set independent of the
1136 * peer-group the appropriate bit should be set here. If this peer is a
1137 * peer-group, this memory region should be all zeros. The assumption
1138 * is that the default state for all flags is unset. Due to filters
1139 * having a direction (e.g. in/out/...), this array has a third
1140 * dimension for storing the overrides independently per direction.
1141 *
1142 * Notes:
1143 * - if a filter for an individual peer is unset, the corresponding
1144 * override flag is unset and the peer is considered to be back in
1145 * sync with the peer-group.
1146 * - This does *not* contain the filter values, rather it contains
1147 * whether the filter in filter (struct bgp_filter) is peer-specific.
1148 */
1149 uint8_t filter_override[AFI_MAX][SAFI_MAX][(FILTER_MAX > RMAP_MAX)
1150 ? FILTER_MAX
1151 : RMAP_MAX];
1152 #define PEER_FT_DISTRIBUTE_LIST (1 << 0) /* distribute-list */
1153 #define PEER_FT_FILTER_LIST (1 << 1) /* filter-list */
1154 #define PEER_FT_PREFIX_LIST (1 << 2) /* prefix-list */
1155 #define PEER_FT_ROUTE_MAP (1 << 3) /* route-map */
1156 #define PEER_FT_UNSUPPRESS_MAP (1 << 4) /* unsuppress-map */
1157
1158 /* ORF Prefix-list */
1159 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1160
1161 /* Text description of last attribute rcvd */
1162 char rcvd_attr_str[BUFSIZ];
1163
1164 /* Track if we printed the attribute in debugs */
1165 int rcvd_attr_printed;
1166
1167 /* Prefix count. */
1168 uint32_t pcount[AFI_MAX][SAFI_MAX];
1169
1170 /* Max prefix count. */
1171 uint32_t pmax[AFI_MAX][SAFI_MAX];
1172 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1173 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1174 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1175
1176 /* allowas-in. */
1177 char allowas_in[AFI_MAX][SAFI_MAX];
1178
1179 /* weight */
1180 unsigned long weight[AFI_MAX][SAFI_MAX];
1181
1182 /* peer reset cause */
1183 uint8_t last_reset;
1184 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1185 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1186 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1187 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1188 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1189 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1190 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1191 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1192 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1193 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1194 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1195 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1196 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1197 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1198 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1199 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1200 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1201 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1202 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1203 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1204 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1205 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1206 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1207 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1208 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1209 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1210 #define PEER_DOWN_WAITING_NHT 27 /* Waiting for NHT to resolve */
1211 #define PEER_DOWN_NBR_ADDR 28 /* Waiting for peer IPv6 IP Addr */
1212 #define PEER_DOWN_VRF_UNINIT 29 /* Associated VRF is not init yet */
1213 #define PEER_DOWN_NOAFI_ACTIVATED 30 /* No AFI/SAFI activated for peer */
1214 #define PEER_DOWN_AS_SETS_REJECT 31 /* Reject routes with AS_SET */
1215 size_t last_reset_cause_size;
1216 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1217
1218 /* The kind of route-map Flags.*/
1219 uint16_t rmap_type;
1220 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1221 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1222 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1223 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1224 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1225 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1226 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1227 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1228 #define PEER_RMAP_TYPE_AGGREGATE (1 << 8) /* aggregate-address route-map */
1229
1230 /* peer specific BFD information */
1231 struct bfd_info *bfd_info;
1232
1233 /* hostname and domainname advertised by host */
1234 char *hostname;
1235 char *domainname;
1236
1237 /* Sender side AS path loop detection. */
1238 bool as_path_loop_detection;
1239
1240 QOBJ_FIELDS
1241 };
1242 DECLARE_QOBJ_TYPE(peer)
1243
1244 /* Inherit peer attribute from peer-group. */
1245 #define PEER_ATTR_INHERIT(peer, group, attr) \
1246 ((peer)->attr = (group)->conf->attr)
1247 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1248 do { \
1249 if ((peer)->attr) \
1250 XFREE(mt, (peer)->attr); \
1251 if ((group)->conf->attr) \
1252 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1253 else \
1254 (peer)->attr = NULL; \
1255 } while (0)
1256 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1257 do { \
1258 if ((peer)->attr) \
1259 sockunion_free((peer)->attr); \
1260 if ((group)->conf->attr) \
1261 (peer)->attr = sockunion_dup((group)->conf->attr); \
1262 else \
1263 (peer)->attr = NULL; \
1264 } while (0)
1265
1266 /* Check if suppress start/restart of sessions to peer. */
1267 #define BGP_PEER_START_SUPPRESSED(P) \
1268 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1269 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1270
1271 #define PEER_PASSWORD_MINLEN (1)
1272 #define PEER_PASSWORD_MAXLEN (80)
1273
1274 /* This structure's member directly points incoming packet data
1275 stream. */
1276 struct bgp_nlri {
1277 /* AFI. */
1278 uint16_t afi; /* iana_afi_t */
1279
1280 /* SAFI. */
1281 uint8_t safi; /* iana_safi_t */
1282
1283 /* Pointer to NLRI byte stream. */
1284 uint8_t *nlri;
1285
1286 /* Length of whole NLRI. */
1287 bgp_size_t length;
1288 };
1289
1290 /* BGP versions. */
1291 #define BGP_VERSION_4 4
1292
1293 /* Default BGP port number. */
1294 #define BGP_PORT_DEFAULT 179
1295
1296 /* BGP minimum message size. */
1297 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1298 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1299 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1300 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1301 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1302 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1303
1304 /* BGP message types. */
1305 #define BGP_MSG_OPEN 1
1306 #define BGP_MSG_UPDATE 2
1307 #define BGP_MSG_NOTIFY 3
1308 #define BGP_MSG_KEEPALIVE 4
1309 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1310 #define BGP_MSG_CAPABILITY 6
1311 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1312
1313 /* BGP open optional parameter. */
1314 #define BGP_OPEN_OPT_AUTH 1
1315 #define BGP_OPEN_OPT_CAP 2
1316
1317 /* BGP4 attribute type codes. */
1318 #define BGP_ATTR_ORIGIN 1
1319 #define BGP_ATTR_AS_PATH 2
1320 #define BGP_ATTR_NEXT_HOP 3
1321 #define BGP_ATTR_MULTI_EXIT_DISC 4
1322 #define BGP_ATTR_LOCAL_PREF 5
1323 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1324 #define BGP_ATTR_AGGREGATOR 7
1325 #define BGP_ATTR_COMMUNITIES 8
1326 #define BGP_ATTR_ORIGINATOR_ID 9
1327 #define BGP_ATTR_CLUSTER_LIST 10
1328 #define BGP_ATTR_DPA 11
1329 #define BGP_ATTR_ADVERTISER 12
1330 #define BGP_ATTR_RCID_PATH 13
1331 #define BGP_ATTR_MP_REACH_NLRI 14
1332 #define BGP_ATTR_MP_UNREACH_NLRI 15
1333 #define BGP_ATTR_EXT_COMMUNITIES 16
1334 #define BGP_ATTR_AS4_PATH 17
1335 #define BGP_ATTR_AS4_AGGREGATOR 18
1336 #define BGP_ATTR_AS_PATHLIMIT 21
1337 #define BGP_ATTR_PMSI_TUNNEL 22
1338 #define BGP_ATTR_ENCAP 23
1339 #define BGP_ATTR_LARGE_COMMUNITIES 32
1340 #define BGP_ATTR_PREFIX_SID 40
1341 #if ENABLE_BGP_VNC_ATTR
1342 #define BGP_ATTR_VNC 255
1343 #endif
1344
1345 /* BGP update origin. */
1346 #define BGP_ORIGIN_IGP 0
1347 #define BGP_ORIGIN_EGP 1
1348 #define BGP_ORIGIN_INCOMPLETE 2
1349
1350 /* BGP notify message codes. */
1351 #define BGP_NOTIFY_HEADER_ERR 1
1352 #define BGP_NOTIFY_OPEN_ERR 2
1353 #define BGP_NOTIFY_UPDATE_ERR 3
1354 #define BGP_NOTIFY_HOLD_ERR 4
1355 #define BGP_NOTIFY_FSM_ERR 5
1356 #define BGP_NOTIFY_CEASE 6
1357 #define BGP_NOTIFY_CAPABILITY_ERR 7
1358
1359 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1360
1361 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1362 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1363 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1364 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1365
1366 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1367 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1368 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1369 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1370 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1371 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1372 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1373 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1374 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1375
1376 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1377 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1378 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1379 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1380 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1381 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1382 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1383 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1384 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1385 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1386 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1387 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1388
1389 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1390 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1391 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1392 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1393 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1394 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1395 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1396 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1397 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1398
1399 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1400 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1401 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1402 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1403
1404 /* BGP finite state machine status. */
1405 #define Idle 1
1406 #define Connect 2
1407 #define Active 3
1408 #define OpenSent 4
1409 #define OpenConfirm 5
1410 #define Established 6
1411 #define Clearing 7
1412 #define Deleted 8
1413 #define BGP_STATUS_MAX 9
1414
1415 /* BGP finite state machine events. */
1416 #define BGP_Start 1
1417 #define BGP_Stop 2
1418 #define TCP_connection_open 3
1419 #define TCP_connection_closed 4
1420 #define TCP_connection_open_failed 5
1421 #define TCP_fatal_error 6
1422 #define ConnectRetry_timer_expired 7
1423 #define Hold_Timer_expired 8
1424 #define KeepAlive_timer_expired 9
1425 #define Receive_OPEN_message 10
1426 #define Receive_KEEPALIVE_message 11
1427 #define Receive_UPDATE_message 12
1428 #define Receive_NOTIFICATION_message 13
1429 #define Clearing_Completed 14
1430 #define BGP_EVENTS_MAX 15
1431
1432 /* BGP timers default value. */
1433 #define BGP_INIT_START_TIMER 1
1434 /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1435 * version-/profile-specific values. The values here do not matter, they only
1436 * exist to provide a clear layering separation between core and CLI.
1437 */
1438 #define BGP_DEFAULT_HOLDTIME 180
1439 #define BGP_DEFAULT_KEEPALIVE 60
1440 #define BGP_DEFAULT_CONNECT_RETRY 120
1441
1442 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1443 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1444
1445 /* BGP default local preference. */
1446 #define BGP_DEFAULT_LOCAL_PREF 100
1447
1448 /* BGP local-preference to send when 'bgp graceful-shutdown'
1449 * is configured */
1450 #define BGP_GSHUT_LOCAL_PREF 0
1451
1452 /* BGP default subgroup packet queue max . */
1453 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1454
1455 /* BGP graceful restart */
1456 #define BGP_DEFAULT_RESTART_TIME 120
1457 #define BGP_DEFAULT_STALEPATH_TIME 360
1458
1459 /* BGP uptime string length. */
1460 #define BGP_UPTIME_LEN 25
1461
1462 /* Default configuration settings for bgpd. */
1463 #define BGP_VTY_PORT 2605
1464 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1465
1466 /* BGP Dynamic Neighbors feature */
1467 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1468 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1469 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1470
1471 /* Flag for peer_clear_soft(). */
1472 enum bgp_clear_type {
1473 BGP_CLEAR_SOFT_NONE,
1474 BGP_CLEAR_SOFT_OUT,
1475 BGP_CLEAR_SOFT_IN,
1476 BGP_CLEAR_SOFT_BOTH,
1477 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1478 };
1479
1480 /* Macros. */
1481 #define BGP_INPUT(P) ((P)->curr)
1482 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1483 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1484 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1485
1486 /* BGP error codes. */
1487 #define BGP_SUCCESS 0
1488 #define BGP_CREATED 1
1489 #define BGP_ERR_INVALID_VALUE -1
1490 #define BGP_ERR_INVALID_FLAG -2
1491 #define BGP_ERR_INVALID_AS -3
1492 #define BGP_ERR_INVALID_BGP -4
1493 #define BGP_ERR_PEER_GROUP_MEMBER -5
1494 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1495 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1496 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1497 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1498 #define BGP_ERR_AS_MISMATCH -12
1499 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1500 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1501 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1502 #define BGP_ERR_NOT_INTERNAL_PEER -16
1503 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1504 #define BGP_ERR_AF_UNCONFIGURED -18
1505 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1506 #define BGP_ERR_INSTANCE_MISMATCH -20
1507 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1508 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1509 #define BGP_ERR_TCPSIG_FAILED -23
1510 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1511 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1512 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1513 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1514 #define BGP_ERR_AS_OVERRIDE -28
1515 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1516 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1517 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1518 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1519 #define BGP_ERR_MAX -33
1520 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1521 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1522
1523 /*
1524 * Enumeration of different policy kinds a peer can be configured with.
1525 */
1526 typedef enum {
1527 BGP_POLICY_ROUTE_MAP,
1528 BGP_POLICY_FILTER_LIST,
1529 BGP_POLICY_PREFIX_LIST,
1530 BGP_POLICY_DISTRIBUTE_LIST,
1531 } bgp_policy_type_e;
1532
1533 /* peer_flag_change_type. */
1534 enum peer_change_type {
1535 peer_change_none,
1536 peer_change_reset,
1537 peer_change_reset_in,
1538 peer_change_reset_out,
1539 };
1540
1541 extern struct bgp_master *bm;
1542 extern unsigned int multipath_num;
1543
1544 /* Prototypes. */
1545 extern void bgp_terminate(void);
1546 extern void bgp_reset(void);
1547 extern time_t bgp_clock(void);
1548 extern void bgp_zclient_reset(void);
1549 extern struct bgp *bgp_get_default(void);
1550 extern struct bgp *bgp_lookup(as_t, const char *);
1551 extern struct bgp *bgp_lookup_by_name(const char *);
1552 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1553 extern struct bgp *bgp_get_evpn(void);
1554 extern void bgp_set_evpn(struct bgp *bgp);
1555 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1556 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1557 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1558 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1559 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1560 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1561 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1562 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1563 union sockunion *,
1564 struct peer_group *);
1565 extern struct prefix *
1566 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1567 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1568 struct prefix *,
1569 struct prefix **);
1570 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1571 union sockunion *);
1572
1573 /*
1574 * Peers are incredibly easy to memory leak
1575 * due to the various ways that they are actually used
1576 * Provide some functionality to debug locks and unlocks
1577 */
1578 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1579 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1580 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1581 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1582
1583 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1584 extern int peer_active(struct peer *);
1585 extern int peer_active_nego(struct peer *);
1586 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1587 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1588 as_t, as_t, int, afi_t, safi_t,
1589 struct peer_group *);
1590 extern struct peer *peer_create_accept(struct bgp *);
1591 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1592 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1593 json_object *json);
1594
1595 extern int bgp_config_write(struct vty *);
1596
1597 extern void bgp_master_init(struct thread_master *master,
1598 const int buffer_size);
1599
1600 extern void bgp_init(unsigned short instance);
1601 extern void bgp_pthreads_run(void);
1602 extern void bgp_pthreads_finish(void);
1603 extern void bgp_route_map_init(void);
1604 extern void bgp_session_reset(struct peer *);
1605
1606 extern int bgp_option_set(int);
1607 extern int bgp_option_unset(int);
1608 extern int bgp_option_check(int);
1609
1610 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1611 extern void bgp_instance_up(struct bgp *);
1612 extern void bgp_instance_down(struct bgp *);
1613 extern int bgp_delete(struct bgp *);
1614
1615 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1616 vrf_id_t old_vrf_id, bool create);
1617
1618 extern int bgp_flag_set(struct bgp *, int);
1619 extern int bgp_flag_unset(struct bgp *, int);
1620 extern int bgp_flag_check(struct bgp *, int);
1621
1622 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1623 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1624
1625 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1626 extern int bgp_cluster_id_unset(struct bgp *);
1627
1628 extern int bgp_confederation_id_set(struct bgp *, as_t);
1629 extern int bgp_confederation_id_unset(struct bgp *);
1630 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1631
1632 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1633 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1634
1635 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
1636 uint32_t connect_retry);
1637 extern int bgp_timers_unset(struct bgp *);
1638
1639 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1640 extern int bgp_default_local_preference_unset(struct bgp *);
1641
1642 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1643 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1644
1645 extern int bgp_listen_limit_set(struct bgp *, int);
1646 extern int bgp_listen_limit_unset(struct bgp *);
1647
1648 extern int bgp_update_delay_active(struct bgp *);
1649 extern int bgp_update_delay_configured(struct bgp *);
1650 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1651 extern void peer_as_change(struct peer *, as_t, int);
1652 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1653 int, afi_t, safi_t);
1654 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1655 extern int peer_delete(struct peer *peer);
1656 extern int peer_notify_unconfig(struct peer *peer);
1657 extern int peer_group_delete(struct peer_group *);
1658 extern int peer_group_remote_as_delete(struct peer_group *);
1659 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1660 extern int peer_group_notify_unconfig(struct peer_group *group);
1661
1662 extern int peer_activate(struct peer *, afi_t, safi_t);
1663 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1664 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1665
1666 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1667 struct peer_group *, as_t *);
1668
1669 extern int peer_flag_set(struct peer *, uint32_t);
1670 extern int peer_flag_unset(struct peer *, uint32_t);
1671 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1672
1673 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1674 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1675 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1676 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1677 uint32_t flag);
1678 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1679 enum peer_change_type type);
1680
1681 extern int peer_ebgp_multihop_set(struct peer *, int);
1682 extern int peer_ebgp_multihop_unset(struct peer *);
1683 extern int is_ebgp_multihop_configured(struct peer *peer);
1684
1685 extern int peer_description_set(struct peer *, const char *);
1686 extern int peer_description_unset(struct peer *);
1687
1688 extern int peer_update_source_if_set(struct peer *, const char *);
1689 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1690 extern int peer_update_source_unset(struct peer *);
1691
1692 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1693 const char *rmap,
1694 struct route_map *route_map);
1695 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1696
1697 extern int peer_port_set(struct peer *, uint16_t);
1698 extern int peer_port_unset(struct peer *);
1699
1700 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1701 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1702
1703 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1704 uint32_t holdtime);
1705 extern int peer_timers_unset(struct peer *);
1706
1707 extern int peer_timers_connect_set(struct peer *, uint32_t);
1708 extern int peer_timers_connect_unset(struct peer *);
1709
1710 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1711 extern int peer_advertise_interval_unset(struct peer *);
1712
1713 extern void peer_interface_set(struct peer *, const char *);
1714 extern void peer_interface_unset(struct peer *);
1715
1716 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1717 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1718
1719 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1720 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1721
1722 extern int peer_local_as_set(struct peer *, as_t, int, int);
1723 extern int peer_local_as_unset(struct peer *);
1724
1725 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1726 const char *);
1727 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1728
1729 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1730 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1731
1732 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1733 const char *name, struct route_map *route_map);
1734 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1735
1736 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1737 const char *name,
1738 struct route_map *route_map);
1739
1740 extern int peer_password_set(struct peer *, const char *);
1741 extern int peer_password_unset(struct peer *);
1742
1743 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1744
1745 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1746 uint8_t, int, uint16_t);
1747 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1748
1749 extern int peer_clear(struct peer *, struct listnode **);
1750 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1751
1752 extern int peer_ttl_security_hops_set(struct peer *, int);
1753 extern int peer_ttl_security_hops_unset(struct peer *);
1754
1755 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1756 extern int peer_tx_shutdown_message_unset(struct peer *);
1757
1758 extern int bgp_route_map_update_timer(struct thread *thread);
1759 extern void bgp_route_map_terminate(void);
1760
1761 extern int peer_cmp(struct peer *p1, struct peer *p2);
1762
1763 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1764 afi_t *afi, safi_t *safi);
1765 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1766 iana_afi_t *pkt_afi,
1767 iana_safi_t *pkt_safi);
1768
1769 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1770 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1771 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1772
1773 extern void bgp_close(void);
1774 extern void bgp_free(struct bgp *);
1775
1776 static inline struct bgp *bgp_lock(struct bgp *bgp)
1777 {
1778 bgp->lock++;
1779 return bgp;
1780 }
1781
1782 static inline void bgp_unlock(struct bgp *bgp)
1783 {
1784 assert(bgp->lock > 0);
1785 if (--bgp->lock == 0)
1786 bgp_free(bgp);
1787 }
1788
1789 static inline int afindex(afi_t afi, safi_t safi)
1790 {
1791 switch (afi) {
1792 case AFI_IP:
1793 switch (safi) {
1794 case SAFI_UNICAST:
1795 return BGP_AF_IPV4_UNICAST;
1796 break;
1797 case SAFI_MULTICAST:
1798 return BGP_AF_IPV4_MULTICAST;
1799 break;
1800 case SAFI_LABELED_UNICAST:
1801 return BGP_AF_IPV4_LBL_UNICAST;
1802 break;
1803 case SAFI_MPLS_VPN:
1804 return BGP_AF_IPV4_VPN;
1805 break;
1806 case SAFI_ENCAP:
1807 return BGP_AF_IPV4_ENCAP;
1808 break;
1809 case SAFI_FLOWSPEC:
1810 return BGP_AF_IPV4_FLOWSPEC;
1811 default:
1812 return BGP_AF_MAX;
1813 break;
1814 }
1815 break;
1816 case AFI_IP6:
1817 switch (safi) {
1818 case SAFI_UNICAST:
1819 return BGP_AF_IPV6_UNICAST;
1820 break;
1821 case SAFI_MULTICAST:
1822 return BGP_AF_IPV6_MULTICAST;
1823 break;
1824 case SAFI_LABELED_UNICAST:
1825 return BGP_AF_IPV6_LBL_UNICAST;
1826 break;
1827 case SAFI_MPLS_VPN:
1828 return BGP_AF_IPV6_VPN;
1829 break;
1830 case SAFI_ENCAP:
1831 return BGP_AF_IPV6_ENCAP;
1832 break;
1833 case SAFI_FLOWSPEC:
1834 return BGP_AF_IPV6_FLOWSPEC;
1835 default:
1836 return BGP_AF_MAX;
1837 break;
1838 }
1839 break;
1840 case AFI_L2VPN:
1841 switch (safi) {
1842 case SAFI_EVPN:
1843 return BGP_AF_L2VPN_EVPN;
1844 break;
1845 default:
1846 return BGP_AF_MAX;
1847 break;
1848 }
1849 default:
1850 return BGP_AF_MAX;
1851 break;
1852 }
1853 }
1854
1855 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1856 static inline int peer_group_active(struct peer *peer)
1857 {
1858 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1859 return 1;
1860 return 0;
1861 }
1862
1863 /* If peer is negotiated at least one address family return 1. */
1864 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1865 {
1866 if (peer->afc_nego[afi][SAFI_UNICAST]
1867 || peer->afc_nego[afi][SAFI_MULTICAST]
1868 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1869 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1870 || peer->afc_nego[afi][SAFI_ENCAP]
1871 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1872 || peer->afc_nego[afi][SAFI_EVPN])
1873 return 1;
1874 return 0;
1875 }
1876
1877 /* If at least one address family activated for group, return 1. */
1878 static inline int peer_group_af_configured(struct peer_group *group)
1879 {
1880 struct peer *peer = group->conf;
1881
1882 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1883 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1884 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1885 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1886 || peer->afc[AFI_IP6][SAFI_UNICAST]
1887 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1888 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1889 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1890 || peer->afc[AFI_IP6][SAFI_ENCAP]
1891 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1892 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1893 return 1;
1894 return 0;
1895 }
1896
1897 static inline char *timestamp_string(time_t ts)
1898 {
1899 time_t tbuf;
1900 tbuf = time(NULL) - (bgp_clock() - ts);
1901 return ctime(&tbuf);
1902 }
1903
1904 static inline int peer_established(struct peer *peer)
1905 {
1906 if (peer->status == Established)
1907 return 1;
1908 return 0;
1909 }
1910
1911 static inline int peer_dynamic_neighbor(struct peer *peer)
1912 {
1913 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1914 }
1915
1916 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1917 {
1918 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1919 }
1920
1921 /* Lookup VRF for BGP instance based on its type. */
1922 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1923 {
1924 struct vrf *vrf;
1925
1926 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1927 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1928 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1929 vrf = vrf_lookup_by_name(bgp->name);
1930 else
1931 vrf = NULL;
1932
1933 return vrf;
1934 }
1935
1936 /* Link BGP instance to VRF. */
1937 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1938 {
1939 bgp->vrf_id = vrf->vrf_id;
1940 if (vrf->info != (void *)bgp)
1941 vrf->info = (void *)bgp_lock(bgp);
1942 }
1943
1944 /* Unlink BGP instance from VRF. */
1945 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1946 {
1947 if (vrf->info == (void *)bgp) {
1948 vrf->info = NULL;
1949 bgp_unlock(bgp);
1950 }
1951 bgp->vrf_id = VRF_UNKNOWN;
1952 }
1953
1954 extern void bgp_unset_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1955
1956 /* For benefit of rfapi */
1957 extern struct peer *peer_new(struct bgp *bgp);
1958
1959 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
1960 const char *ip_str, bool use_json);
1961
1962 /* Hooks */
1963 DECLARE_HOOK(peer_status_changed, (struct peer * peer), (peer))
1964
1965 #endif /* _QUAGGA_BGPD_H */
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