]> git.proxmox.com Git - mirror_frr.git/blob - bgpd/bgpd.h
projects / mirror_frr.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge pull request #5248 from opensourcerouting/bgp-sender-as-path-loop-detection
[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
461 /* BGP graceful restart */
462 uint32_t restart_time;
463 uint32_t stalepath_time;
464
465 /* Maximum-paths configuration */
466 struct bgp_maxpaths_cfg {
467 uint16_t maxpaths_ebgp;
468 uint16_t maxpaths_ibgp;
469 uint16_t ibgp_flags;
470 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
471 } maxpaths[AFI_MAX][SAFI_MAX];
472
473 _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
474 _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
475
476 /* Automatic coalesce adjust on/off */
477 bool heuristic_coalesce;
478 /* Actual coalesce time */
479 uint32_t coalesce_time;
480
481 /* Auto-shutdown new peers */
482 bool autoshutdown;
483
484 struct bgp_addpath_bgp_data tx_addpath;
485
486 #if ENABLE_BGP_VNC
487 struct rfapi_cfg *rfapi_cfg;
488 struct rfapi *rfapi;
489 #endif
490
491 /* EVPN related information */
492
493 /* EVI hash table */
494 struct hash *vnihash;
495
496 /* EVPN enable - advertise gateway macip routes */
497 int advertise_gw_macip;
498
499 /* EVPN enable - advertise local VNIs and their MACs etc. */
500 int advertise_all_vni;
501
502 /* RFC 8212 - prevent route leaks. */
503 int ebgp_requires_policy;
504 #define DEFAULT_EBGP_POLICY_DISABLED 0
505 #define DEFAULT_EBGP_POLICY_ENABLED 1
506
507 struct bgp_evpn_info *evpn_info;
508
509 /* EVPN - use RFC 8365 to auto-derive RT */
510 int advertise_autort_rfc8365;
511
512 /*
513 * Flooding mechanism for BUM packets for VxLAN-EVPN.
514 */
515 enum vxlan_flood_control vxlan_flood_ctrl;
516
517 /* Hash table of Import RTs to EVIs */
518 struct hash *import_rt_hash;
519
520 /* Hash table of VRF import RTs to VRFs */
521 struct hash *vrf_import_rt_hash;
522
523 /* L3-VNI corresponding to this vrf */
524 vni_t l3vni;
525
526 /* router-mac to be used in mac-ip routes for this vrf */
527 struct ethaddr rmac;
528
529 /* originator ip - to be used as NH for type-5 routes */
530 struct in_addr originator_ip;
531
532 /* SVI associated with the L3-VNI corresponding to this vrf */
533 ifindex_t l3vni_svi_ifindex;
534
535 /* vrf flags */
536 uint32_t vrf_flags;
537 #define BGP_VRF_AUTO (1 << 0)
538 #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
539 #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
540 #define BGP_VRF_RD_CFGD (1 << 3)
541 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
542
543
544 /* unique ID for auto derivation of RD for this vrf */
545 uint16_t vrf_rd_id;
546
547 /* Automatically derived RD for this VRF */
548 struct prefix_rd vrf_prd_auto;
549
550 /* RD for this VRF */
551 struct prefix_rd vrf_prd;
552
553 /* import rt list for the vrf instance */
554 struct list *vrf_import_rtl;
555
556 /* export rt list for the vrf instance */
557 struct list *vrf_export_rtl;
558
559 /* list of corresponding l2vnis (struct bgpevpn) */
560 struct list *l2vnis;
561
562 /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
563 struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
564
565 struct vpn_policy vpn_policy[AFI_MAX];
566
567 struct bgp_pbr_config *bgp_pbr_cfg;
568
569 /* local esi hash table */
570 struct hash *esihash;
571
572 /* Count of peers in established state */
573 uint32_t established_peers;
574
575 QOBJ_FIELDS
576 };
577 DECLARE_QOBJ_TYPE(bgp)
578
579 DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
580 DECLARE_HOOK(bgp_inst_config_write,
581 (struct bgp *bgp, struct vty *vty),
582 (bgp, vty))
583
584 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
585
586 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
587 (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
588 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
589 && bgp->vrf_id != VRF_UNKNOWN))
590
591 /* BGP peer-group support. */
592 struct peer_group {
593 /* Name of the peer-group. */
594 char *name;
595
596 /* Pointer to BGP. */
597 struct bgp *bgp;
598
599 /* Peer-group client list. */
600 struct list *peer;
601
602 /** Dynamic neighbor listening ranges */
603 struct list *listen_range[AFI_MAX];
604
605 /* Peer-group config */
606 struct peer *conf;
607 };
608
609 /* BGP Notify message format. */
610 struct bgp_notify {
611 uint8_t code;
612 uint8_t subcode;
613 char *data;
614 bgp_size_t length;
615 uint8_t *raw_data;
616 };
617
618 /* Next hop self address. */
619 struct bgp_nexthop {
620 struct interface *ifp;
621 struct in_addr v4;
622 struct in6_addr v6_global;
623 struct in6_addr v6_local;
624 };
625
626 /* BGP addpath values */
627 #define BGP_ADDPATH_RX 1
628 #define BGP_ADDPATH_TX 2
629 #define BGP_ADDPATH_ID_LEN 4
630
631 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
632
633 /* Route map direction */
634 #define RMAP_IN 0
635 #define RMAP_OUT 1
636 #define RMAP_MAX 2
637
638 #define BGP_DEFAULT_TTL 1
639
640 #include "filter.h"
641
642 /* BGP filter structure. */
643 struct bgp_filter {
644 /* Distribute-list. */
645 struct {
646 char *name;
647 struct access_list *alist;
648 } dlist[FILTER_MAX];
649
650 /* Prefix-list. */
651 struct {
652 char *name;
653 struct prefix_list *plist;
654 } plist[FILTER_MAX];
655
656 /* Filter-list. */
657 struct {
658 char *name;
659 struct as_list *aslist;
660 } aslist[FILTER_MAX];
661
662 /* Route-map. */
663 struct {
664 char *name;
665 struct route_map *map;
666 } map[RMAP_MAX];
667
668 /* Unsuppress-map. */
669 struct {
670 char *name;
671 struct route_map *map;
672 } usmap;
673 };
674
675 /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
676 a peer who's AS is part of our Confederation. */
677 typedef enum {
678 BGP_PEER_UNSPECIFIED,
679 BGP_PEER_IBGP,
680 BGP_PEER_EBGP,
681 BGP_PEER_INTERNAL,
682 BGP_PEER_CONFED,
683 } bgp_peer_sort_t;
684
685 /* BGP message header and packet size. */
686 #define BGP_MARKER_SIZE 16
687 #define BGP_HEADER_SIZE 19
688 #define BGP_MAX_PACKET_SIZE 4096
689 #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
690
691 /*
692 * Trigger delay for bgp_announce_route().
693 */
694 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
695 #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
696
697 struct peer_af {
698 /* back pointer to the peer */
699 struct peer *peer;
700
701 /* which subgroup the peer_af belongs to */
702 struct update_subgroup *subgroup;
703
704 /* for being part of an update subgroup's peer list */
705 LIST_ENTRY(peer_af) subgrp_train;
706
707 /* for being part of a packet's peer list */
708 LIST_ENTRY(peer_af) pkt_train;
709
710 struct bpacket *next_pkt_to_send;
711
712 /*
713 * Trigger timer for bgp_announce_route().
714 */
715 struct thread *t_announce_route;
716
717 afi_t afi;
718 safi_t safi;
719 int afid;
720 };
721
722 /* BGP neighbor structure. */
723 struct peer {
724 /* BGP structure. */
725 struct bgp *bgp;
726
727 /* reference count, primarily to allow bgp_process'ing of route_node's
728 * to be done after a struct peer is deleted.
729 *
730 * named 'lock' for hysterical reasons within Quagga.
731 */
732 int lock;
733
734 /* BGP peer group. */
735 struct peer_group *group;
736 uint64_t version[AFI_MAX][SAFI_MAX];
737
738 /* BGP peer_af structures, per configured AF on this peer */
739 struct peer_af *peer_af_array[BGP_AF_MAX];
740
741 /* Peer's remote AS number. */
742 int as_type;
743 as_t as;
744
745 /* Peer's local AS number. */
746 as_t local_as;
747
748 bgp_peer_sort_t sort;
749
750 /* Peer's Change local AS number. */
751 as_t change_local_as;
752
753 /* Remote router ID. */
754 struct in_addr remote_id;
755
756 /* Local router ID. */
757 struct in_addr local_id;
758
759 /* Packet receive and send buffer. */
760 pthread_mutex_t io_mtx; // guards ibuf, obuf
761 struct stream_fifo *ibuf; // packets waiting to be processed
762 struct stream_fifo *obuf; // packets waiting to be written
763
764 struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
765 struct stream *obuf_work; // WiP buffer used to construct packets
766
767 struct stream *curr; // the current packet being parsed
768
769 /* We use a separate stream to encode MP_REACH_NLRI for efficient
770 * NLRI packing. peer->obuf_work stores all the other attributes. The
771 * actual packet is then constructed by concatenating the two.
772 */
773 struct stream *scratch;
774
775 /* the doppelganger peer structure, due to dual TCP conn setup */
776 struct peer *doppelganger;
777
778 /* Status of the peer. */
779 int status;
780 int ostatus;
781
782 /* FSM events, stored for debug purposes.
783 * Note: uchar used for reduced memory usage.
784 */
785 unsigned char cur_event;
786 unsigned char last_event;
787 unsigned char last_major_event;
788
789 /* Peer index, used for dumping TABLE_DUMP_V2 format */
790 uint16_t table_dump_index;
791
792 /* Peer information */
793 int fd; /* File descriptor */
794 int ttl; /* TTL of TCP connection to the peer. */
795 int rtt; /* Estimated round-trip-time from TCP_INFO */
796 int gtsm_hops; /* minimum hopcount to peer */
797 char *desc; /* Description of the peer. */
798 unsigned short port; /* Destination port for peer */
799 char *host; /* Printable address of the peer. */
800 union sockunion su; /* Sockunion address of the peer. */
801 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
802 time_t uptime; /* Last Up/Down time */
803 time_t readtime; /* Last read time */
804 time_t resettime; /* Last reset time */
805
806 char *conf_if; /* neighbor interface config name. */
807 struct interface *ifp; /* corresponding interface */
808 char *ifname; /* bind interface name. */
809 char *update_if;
810 union sockunion *update_source;
811
812 union sockunion *su_local; /* Sockunion of local address. */
813 union sockunion *su_remote; /* Sockunion of remote address. */
814 int shared_network; /* Is this peer shared same network. */
815 struct bgp_nexthop nexthop; /* Nexthop */
816
817 /* Peer address family configuration. */
818 uint8_t afc[AFI_MAX][SAFI_MAX];
819 uint8_t afc_nego[AFI_MAX][SAFI_MAX];
820 uint8_t afc_adv[AFI_MAX][SAFI_MAX];
821 uint8_t afc_recv[AFI_MAX][SAFI_MAX];
822
823 /* Capability flags (reset in bgp_stop) */
824 uint32_t cap;
825 #define PEER_CAP_REFRESH_ADV (1 << 0) /* refresh advertised */
826 #define PEER_CAP_REFRESH_OLD_RCV (1 << 1) /* refresh old received */
827 #define PEER_CAP_REFRESH_NEW_RCV (1 << 2) /* refresh rfc received */
828 #define PEER_CAP_DYNAMIC_ADV (1 << 3) /* dynamic advertised */
829 #define PEER_CAP_DYNAMIC_RCV (1 << 4) /* dynamic received */
830 #define PEER_CAP_RESTART_ADV (1 << 5) /* restart advertised */
831 #define PEER_CAP_RESTART_RCV (1 << 6) /* restart received */
832 #define PEER_CAP_AS4_ADV (1 << 7) /* as4 advertised */
833 #define PEER_CAP_AS4_RCV (1 << 8) /* as4 received */
834 #define PEER_CAP_RESTART_BIT_ADV (1 << 9) /* sent restart state */
835 #define PEER_CAP_RESTART_BIT_RCV (1 << 10) /* peer restart state */
836 #define PEER_CAP_ADDPATH_ADV (1 << 11) /* addpath advertised */
837 #define PEER_CAP_ADDPATH_RCV (1 << 12) /* addpath received */
838 #define PEER_CAP_ENHE_ADV (1 << 13) /* Extended nexthop advertised */
839 #define PEER_CAP_ENHE_RCV (1 << 14) /* Extended nexthop received */
840 #define PEER_CAP_HOSTNAME_ADV (1 << 15) /* hostname advertised */
841 #define PEER_CAP_HOSTNAME_RCV (1 << 16) /* hostname received */
842
843 /* Capability flags (reset in bgp_stop) */
844 uint32_t af_cap[AFI_MAX][SAFI_MAX];
845 #define PEER_CAP_ORF_PREFIX_SM_ADV (1 << 0) /* send-mode advertised */
846 #define PEER_CAP_ORF_PREFIX_RM_ADV (1 << 1) /* receive-mode advertised */
847 #define PEER_CAP_ORF_PREFIX_SM_RCV (1 << 2) /* send-mode received */
848 #define PEER_CAP_ORF_PREFIX_RM_RCV (1 << 3) /* receive-mode received */
849 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1 << 4) /* send-mode received */
850 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1 << 5) /* receive-mode received */
851 #define PEER_CAP_RESTART_AF_RCV (1 << 6) /* graceful restart afi/safi received */
852 #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1 << 7) /* graceful restart afi/safi F-bit received */
853 #define PEER_CAP_ADDPATH_AF_TX_ADV (1 << 8) /* addpath tx advertised */
854 #define PEER_CAP_ADDPATH_AF_TX_RCV (1 << 9) /* addpath tx received */
855 #define PEER_CAP_ADDPATH_AF_RX_ADV (1 << 10) /* addpath rx advertised */
856 #define PEER_CAP_ADDPATH_AF_RX_RCV (1 << 11) /* addpath rx received */
857 #define PEER_CAP_ENHE_AF_ADV (1 << 12) /* Extended nexthopi afi/safi advertised */
858 #define PEER_CAP_ENHE_AF_RCV (1 << 13) /* Extended nexthop afi/safi received */
859 #define PEER_CAP_ENHE_AF_NEGO (1 << 14) /* Extended nexthop afi/safi negotiated */
860
861 /* Global configuration flags. */
862 /*
863 * Parallel array to flags that indicates whether each flag originates
864 * from a peer-group or if it is config that is specific to this
865 * individual peer. If a flag is set independent of the peer-group, the
866 * same bit should be set here. If this peer is a peer-group, this
867 * memory region should be all zeros.
868 *
869 * The assumption is that the default state for all flags is unset,
870 * so if a flag is unset, the corresponding override flag is unset too.
871 * However if a flag is set, the corresponding override flag is set.
872 */
873 uint32_t flags_override;
874 /*
875 * Parallel array to flags that indicates whether the default behavior
876 * of *flags_override* should be inverted. If a flag is unset and the
877 * corresponding invert flag is set, the corresponding override flag
878 * would be set. However if a flag is set and the corresponding invert
879 * flag is unset, the corresponding override flag would be unset.
880 *
881 * This can be used for attributes like *send-community*, which are
882 * implicitely enabled and have to be disabled explicitely, compared to
883 * 'normal' attributes like *next-hop-self* which are implicitely set.
884 *
885 * All operations dealing with flags should apply the following boolean
886 * logic to keep the internal flag system in a sane state:
887 *
888 * value=0 invert=0 Inherit flag if member, otherwise unset flag
889 * value=0 invert=1 Unset flag unconditionally
890 * value=1 invert=0 Set flag unconditionally
891 * value=1 invert=1 Inherit flag if member, otherwise set flag
892 *
893 * Contrary to the implementation of *flags_override*, the flag
894 * inversion state can be set either on the peer OR the peer *and* the
895 * peer-group. This was done on purpose, as the inversion state of a
896 * flag can be determined on either the peer or the peer-group.
897 *
898 * Example: Enabling the cisco configuration mode inverts all flags
899 * related to *send-community* unconditionally for both peer-groups and
900 * peers.
901 *
902 * This behavior is different for interface peers though, which enable
903 * the *extended-nexthop* flag by default, which regular peers do not.
904 * As the peer-group can contain both regular and interface peers, the
905 * flag inversion state must be set on the peer only.
906 *
907 * When a peer inherits the configuration from a peer-group and the
908 * inversion state of the flag differs between peer and peer-group, the
909 * newly set value must equal to the inverted state of the peer-group.
910 */
911 uint32_t flags_invert;
912 /*
913 * Effective array for storing the peer/peer-group flags. In case of a
914 * peer-group, the peer-specific overrides (see flags_override and
915 * flags_invert) must be respected.
916 */
917 uint32_t flags;
918 #define PEER_FLAG_PASSIVE (1 << 0) /* passive mode */
919 #define PEER_FLAG_SHUTDOWN (1 << 1) /* shutdown */
920 #define PEER_FLAG_DONT_CAPABILITY (1 << 2) /* dont-capability */
921 #define PEER_FLAG_OVERRIDE_CAPABILITY (1 << 3) /* override-capability */
922 #define PEER_FLAG_STRICT_CAP_MATCH (1 << 4) /* strict-match */
923 #define PEER_FLAG_DYNAMIC_CAPABILITY (1 << 5) /* dynamic capability */
924 #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1 << 6) /* disable-connected-check */
925 #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1 << 7) /* local-as no-prepend */
926 #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1 << 8) /* local-as no-prepend replace-as */
927 #define PEER_FLAG_DELETE (1 << 9) /* mark the peer for deleting */
928 #define PEER_FLAG_CONFIG_NODE (1 << 10) /* the node to update configs on */
929 #define PEER_FLAG_LONESOUL (1 << 11)
930 #define PEER_FLAG_DYNAMIC_NEIGHBOR (1 << 12) /* dynamic neighbor */
931 #define PEER_FLAG_CAPABILITY_ENHE (1 << 13) /* Extended next-hop (rfc 5549)*/
932 #define PEER_FLAG_IFPEER_V6ONLY (1 << 14) /* if-based peer is v6 only */
933 #define PEER_FLAG_IS_RFAPI_HD (1 << 15) /* attached to rfapi HD */
934 #define PEER_FLAG_ENFORCE_FIRST_AS (1 << 16) /* enforce-first-as */
935 #define PEER_FLAG_ROUTEADV (1 << 17) /* route advertise */
936 #define PEER_FLAG_TIMER (1 << 18) /* keepalive & holdtime */
937 #define PEER_FLAG_TIMER_CONNECT (1 << 19) /* connect timer */
938 #define PEER_FLAG_PASSWORD (1 << 20) /* password */
939 #define PEER_FLAG_LOCAL_AS (1 << 21) /* local-as */
940 #define PEER_FLAG_UPDATE_SOURCE (1 << 22) /* update-source */
941
942 /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
943 char *tx_shutdown_message;
944
945 /* NSF mode (graceful restart) */
946 uint8_t nsf[AFI_MAX][SAFI_MAX];
947
948 /* Peer Per AF flags */
949 /*
950 * Please consult the comments for *flags_override*, *flags_invert* and
951 * *flags* to understand what these three arrays do. The address-family
952 * specific attributes are being treated the exact same way as global
953 * peer attributes.
954 */
955 uint32_t af_flags_override[AFI_MAX][SAFI_MAX];
956 uint32_t af_flags_invert[AFI_MAX][SAFI_MAX];
957 uint32_t af_flags[AFI_MAX][SAFI_MAX];
958 #define PEER_FLAG_SEND_COMMUNITY (1 << 0) /* send-community */
959 #define PEER_FLAG_SEND_EXT_COMMUNITY (1 << 1) /* send-community ext. */
960 #define PEER_FLAG_NEXTHOP_SELF (1 << 2) /* next-hop-self */
961 #define PEER_FLAG_REFLECTOR_CLIENT (1 << 3) /* reflector-client */
962 #define PEER_FLAG_RSERVER_CLIENT (1 << 4) /* route-server-client */
963 #define PEER_FLAG_SOFT_RECONFIG (1 << 5) /* soft-reconfiguration */
964 #define PEER_FLAG_AS_PATH_UNCHANGED (1 << 6) /* transparent-as */
965 #define PEER_FLAG_NEXTHOP_UNCHANGED (1 << 7) /* transparent-next-hop */
966 #define PEER_FLAG_MED_UNCHANGED (1 << 8) /* transparent-next-hop */
967 #define PEER_FLAG_DEFAULT_ORIGINATE (1 << 9) /* default-originate */
968 #define PEER_FLAG_REMOVE_PRIVATE_AS (1 << 10) /* remove-private-as */
969 #define PEER_FLAG_ALLOWAS_IN (1 << 11) /* set allowas-in */
970 #define PEER_FLAG_ORF_PREFIX_SM (1 << 12) /* orf capability send-mode */
971 #define PEER_FLAG_ORF_PREFIX_RM (1 << 13) /* orf capability receive-mode */
972 #define PEER_FLAG_MAX_PREFIX (1 << 14) /* maximum prefix */
973 #define PEER_FLAG_MAX_PREFIX_WARNING (1 << 15) /* maximum prefix warning-only */
974 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1 << 16) /* leave link-local nexthop unchanged */
975 #define PEER_FLAG_FORCE_NEXTHOP_SELF (1 << 17) /* next-hop-self force */
976 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1 << 18) /* remove-private-as all */
977 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
978 #define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
979 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
980 #define PEER_FLAG_WEIGHT (1 << 24) /* weight */
981 #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1 << 25) /* allowas-in origin */
982 #define PEER_FLAG_SEND_LARGE_COMMUNITY (1 << 26) /* Send large Communities */
983
984 enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
985
986 /* MD5 password */
987 char *password;
988
989 /* default-originate route-map. */
990 struct {
991 char *name;
992 struct route_map *map;
993 } default_rmap[AFI_MAX][SAFI_MAX];
994
995 /* Peer status flags. */
996 uint16_t sflags;
997 #define PEER_STATUS_ACCEPT_PEER (1 << 0) /* accept peer */
998 #define PEER_STATUS_PREFIX_OVERFLOW (1 << 1) /* prefix-overflow */
999 #define PEER_STATUS_CAPABILITY_OPEN (1 << 2) /* capability open send */
1000 #define PEER_STATUS_HAVE_ACCEPT (1 << 3) /* accept peer's parent */
1001 #define PEER_STATUS_GROUP (1 << 4) /* peer-group conf */
1002 #define PEER_STATUS_NSF_MODE (1 << 5) /* NSF aware peer */
1003 #define PEER_STATUS_NSF_WAIT (1 << 6) /* wait comeback peer */
1004
1005 /* Peer status af flags (reset in bgp_stop) */
1006 uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1007 #define PEER_STATUS_ORF_PREFIX_SEND (1 << 0) /* prefix-list send peer */
1008 #define PEER_STATUS_ORF_WAIT_REFRESH (1 << 1) /* wait refresh received peer */
1009 #define PEER_STATUS_PREFIX_THRESHOLD (1 << 2) /* exceed prefix-threshold */
1010 #define PEER_STATUS_PREFIX_LIMIT (1 << 3) /* exceed prefix-limit */
1011 #define PEER_STATUS_EOR_SEND (1 << 4) /* end-of-rib send to peer */
1012 #define PEER_STATUS_EOR_RECEIVED (1 << 5) /* end-of-rib received from peer */
1013
1014 /* Configured timer values. */
1015 _Atomic uint32_t holdtime;
1016 _Atomic uint32_t keepalive;
1017 _Atomic uint32_t connect;
1018 _Atomic uint32_t routeadv;
1019
1020 /* Timer values. */
1021 _Atomic uint32_t v_start;
1022 _Atomic uint32_t v_connect;
1023 _Atomic uint32_t v_holdtime;
1024 _Atomic uint32_t v_keepalive;
1025 _Atomic uint32_t v_routeadv;
1026 _Atomic uint32_t v_pmax_restart;
1027 _Atomic uint32_t v_gr_restart;
1028
1029 /* Threads. */
1030 struct thread *t_read;
1031 struct thread *t_write;
1032 struct thread *t_start;
1033 struct thread *t_connect_check_r;
1034 struct thread *t_connect_check_w;
1035 struct thread *t_connect;
1036 struct thread *t_holdtime;
1037 struct thread *t_routeadv;
1038 struct thread *t_pmax_restart;
1039 struct thread *t_gr_restart;
1040 struct thread *t_gr_stale;
1041 struct thread *t_generate_updgrp_packets;
1042 struct thread *t_process_packet;
1043
1044 /* Thread flags. */
1045 _Atomic uint32_t thread_flags;
1046 #define PEER_THREAD_WRITES_ON (1 << 0)
1047 #define PEER_THREAD_READS_ON (1 << 1)
1048 #define PEER_THREAD_KEEPALIVES_ON (1 << 2)
1049 /* workqueues */
1050 struct work_queue *clear_node_queue;
1051
1052 #define PEER_TOTAL_RX(peer) \
1053 atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1054 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1055 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1056 + atomic_load_explicit(&peer->refresh_in, \
1057 memory_order_relaxed) \
1058 + atomic_load_explicit(&peer->keepalive_in, \
1059 memory_order_relaxed) \
1060 + atomic_load_explicit(&peer->dynamic_cap_in, \
1061 memory_order_relaxed)
1062
1063 #define PEER_TOTAL_TX(peer) \
1064 atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1065 + atomic_load_explicit(&peer->update_out, \
1066 memory_order_relaxed) \
1067 + atomic_load_explicit(&peer->notify_out, \
1068 memory_order_relaxed) \
1069 + atomic_load_explicit(&peer->refresh_out, \
1070 memory_order_relaxed) \
1071 + atomic_load_explicit(&peer->keepalive_out, \
1072 memory_order_relaxed) \
1073 + atomic_load_explicit(&peer->dynamic_cap_out, \
1074 memory_order_relaxed)
1075
1076 /* Statistics field */
1077 _Atomic uint32_t open_in; /* Open message input count */
1078 _Atomic uint32_t open_out; /* Open message output count */
1079 _Atomic uint32_t update_in; /* Update message input count */
1080 _Atomic uint32_t update_out; /* Update message ouput count */
1081 _Atomic time_t update_time; /* Update message received time. */
1082 _Atomic uint32_t keepalive_in; /* Keepalive input count */
1083 _Atomic uint32_t keepalive_out; /* Keepalive output count */
1084 _Atomic uint32_t notify_in; /* Notify input count */
1085 _Atomic uint32_t notify_out; /* Notify output count */
1086 _Atomic uint32_t refresh_in; /* Route Refresh input count */
1087 _Atomic uint32_t refresh_out; /* Route Refresh output count */
1088 _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1089 _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1090
1091 uint32_t stat_pfx_filter;
1092 uint32_t stat_pfx_aspath_loop;
1093 uint32_t stat_pfx_originator_loop;
1094 uint32_t stat_pfx_cluster_loop;
1095 uint32_t stat_pfx_nh_invalid;
1096 uint32_t stat_pfx_dup_withdraw;
1097 uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1098
1099 /* BGP state count */
1100 uint32_t established; /* Established */
1101 uint32_t dropped; /* Dropped */
1102
1103 /* Update delay related fields */
1104 uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1105 for EOR */
1106
1107 /* Syncronization list and time. */
1108 struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1109 time_t synctime;
1110 /* timestamp when the last UPDATE msg was written */
1111 _Atomic time_t last_write;
1112 /* timestamp when the last msg was written */
1113 _Atomic time_t last_update;
1114
1115 /* Send prefix count. */
1116 unsigned long scount[AFI_MAX][SAFI_MAX];
1117
1118 /* Notify data. */
1119 struct bgp_notify notify;
1120
1121 /* Filter structure. */
1122 struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1123
1124 /*
1125 * Parallel array to filter that indicates whether each filter
1126 * originates from a peer-group or if it is config that is specific to
1127 * this individual peer. If a filter is set independent of the
1128 * peer-group the appropriate bit should be set here. If this peer is a
1129 * peer-group, this memory region should be all zeros. The assumption
1130 * is that the default state for all flags is unset. Due to filters
1131 * having a direction (e.g. in/out/...), this array has a third
1132 * dimension for storing the overrides independently per direction.
1133 *
1134 * Notes:
1135 * - if a filter for an individual peer is unset, the corresponding
1136 * override flag is unset and the peer is considered to be back in
1137 * sync with the peer-group.
1138 * - This does *not* contain the filter values, rather it contains
1139 * whether the filter in filter (struct bgp_filter) is peer-specific.
1140 */
1141 uint8_t filter_override[AFI_MAX][SAFI_MAX][(FILTER_MAX > RMAP_MAX)
1142 ? FILTER_MAX
1143 : RMAP_MAX];
1144 #define PEER_FT_DISTRIBUTE_LIST (1 << 0) /* distribute-list */
1145 #define PEER_FT_FILTER_LIST (1 << 1) /* filter-list */
1146 #define PEER_FT_PREFIX_LIST (1 << 2) /* prefix-list */
1147 #define PEER_FT_ROUTE_MAP (1 << 3) /* route-map */
1148 #define PEER_FT_UNSUPPRESS_MAP (1 << 4) /* unsuppress-map */
1149
1150 /* ORF Prefix-list */
1151 struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1152
1153 /* Text description of last attribute rcvd */
1154 char rcvd_attr_str[BUFSIZ];
1155
1156 /* Track if we printed the attribute in debugs */
1157 int rcvd_attr_printed;
1158
1159 /* Prefix count. */
1160 uint32_t pcount[AFI_MAX][SAFI_MAX];
1161
1162 /* Max prefix count. */
1163 uint32_t pmax[AFI_MAX][SAFI_MAX];
1164 uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1165 uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1166 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1167
1168 /* allowas-in. */
1169 char allowas_in[AFI_MAX][SAFI_MAX];
1170
1171 /* weight */
1172 unsigned long weight[AFI_MAX][SAFI_MAX];
1173
1174 /* peer reset cause */
1175 uint8_t last_reset;
1176 #define PEER_DOWN_RID_CHANGE 1 /* bgp router-id command */
1177 #define PEER_DOWN_REMOTE_AS_CHANGE 2 /* neighbor remote-as command */
1178 #define PEER_DOWN_LOCAL_AS_CHANGE 3 /* neighbor local-as command */
1179 #define PEER_DOWN_CLID_CHANGE 4 /* bgp cluster-id command */
1180 #define PEER_DOWN_CONFED_ID_CHANGE 5 /* bgp confederation identifier command */
1181 #define PEER_DOWN_CONFED_PEER_CHANGE 6 /* bgp confederation peer command */
1182 #define PEER_DOWN_RR_CLIENT_CHANGE 7 /* neighbor route-reflector-client command */
1183 #define PEER_DOWN_RS_CLIENT_CHANGE 8 /* neighbor route-server-client command */
1184 #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9 /* neighbor update-source command */
1185 #define PEER_DOWN_AF_ACTIVATE 10 /* neighbor activate command */
1186 #define PEER_DOWN_USER_SHUTDOWN 11 /* neighbor shutdown command */
1187 #define PEER_DOWN_USER_RESET 12 /* clear ip bgp command */
1188 #define PEER_DOWN_NOTIFY_RECEIVED 13 /* notification received */
1189 #define PEER_DOWN_NOTIFY_SEND 14 /* notification send */
1190 #define PEER_DOWN_CLOSE_SESSION 15 /* tcp session close */
1191 #define PEER_DOWN_NEIGHBOR_DELETE 16 /* neghbor delete */
1192 #define PEER_DOWN_RMAP_BIND 17 /* neghbor peer-group command */
1193 #define PEER_DOWN_RMAP_UNBIND 18 /* no neighbor peer-group command */
1194 #define PEER_DOWN_CAPABILITY_CHANGE 19 /* neighbor capability command */
1195 #define PEER_DOWN_PASSIVE_CHANGE 20 /* neighbor passive command */
1196 #define PEER_DOWN_MULTIHOP_CHANGE 21 /* neighbor multihop command */
1197 #define PEER_DOWN_NSF_CLOSE_SESSION 22 /* NSF tcp session close */
1198 #define PEER_DOWN_V6ONLY_CHANGE 23 /* if-based peering v6only toggled */
1199 #define PEER_DOWN_BFD_DOWN 24 /* BFD down */
1200 #define PEER_DOWN_IF_DOWN 25 /* Interface down */
1201 #define PEER_DOWN_NBR_ADDR_DEL 26 /* Peer address lost */
1202 #define PEER_DOWN_WAITING_NHT 27 /* Waiting for NHT to resolve */
1203 #define PEER_DOWN_NBR_ADDR 28 /* Waiting for peer IPv6 IP Addr */
1204 #define PEER_DOWN_VRF_UNINIT 29 /* Associated VRF is not init yet */
1205 #define PEER_DOWN_NOAFI_ACTIVATED 30 /* No AFI/SAFI activated for peer */
1206 size_t last_reset_cause_size;
1207 uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1208
1209 /* The kind of route-map Flags.*/
1210 uint16_t rmap_type;
1211 #define PEER_RMAP_TYPE_IN (1 << 0) /* neighbor route-map in */
1212 #define PEER_RMAP_TYPE_OUT (1 << 1) /* neighbor route-map out */
1213 #define PEER_RMAP_TYPE_NETWORK (1 << 2) /* network route-map */
1214 #define PEER_RMAP_TYPE_REDISTRIBUTE (1 << 3) /* redistribute route-map */
1215 #define PEER_RMAP_TYPE_DEFAULT (1 << 4) /* default-originate route-map */
1216 #define PEER_RMAP_TYPE_NOSET (1 << 5) /* not allow to set commands */
1217 #define PEER_RMAP_TYPE_IMPORT (1 << 6) /* neighbor route-map import */
1218 #define PEER_RMAP_TYPE_EXPORT (1 << 7) /* neighbor route-map export */
1219 #define PEER_RMAP_TYPE_AGGREGATE (1 << 8) /* aggregate-address route-map */
1220
1221 /* peer specific BFD information */
1222 struct bfd_info *bfd_info;
1223
1224 /* hostname and domainname advertised by host */
1225 char *hostname;
1226 char *domainname;
1227
1228 /* Sender side AS path loop detection. */
1229 bool as_path_loop_detection;
1230
1231 QOBJ_FIELDS
1232 };
1233 DECLARE_QOBJ_TYPE(peer)
1234
1235 /* Inherit peer attribute from peer-group. */
1236 #define PEER_ATTR_INHERIT(peer, group, attr) \
1237 ((peer)->attr = (group)->conf->attr)
1238 #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1239 do { \
1240 if ((peer)->attr) \
1241 XFREE(mt, (peer)->attr); \
1242 if ((group)->conf->attr) \
1243 (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1244 else \
1245 (peer)->attr = NULL; \
1246 } while (0)
1247 #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1248 do { \
1249 if ((peer)->attr) \
1250 sockunion_free((peer)->attr); \
1251 if ((group)->conf->attr) \
1252 (peer)->attr = sockunion_dup((group)->conf->attr); \
1253 else \
1254 (peer)->attr = NULL; \
1255 } while (0)
1256
1257 /* Check if suppress start/restart of sessions to peer. */
1258 #define BGP_PEER_START_SUPPRESSED(P) \
1259 (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) \
1260 || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1261
1262 #define PEER_PASSWORD_MINLEN (1)
1263 #define PEER_PASSWORD_MAXLEN (80)
1264
1265 /* This structure's member directly points incoming packet data
1266 stream. */
1267 struct bgp_nlri {
1268 /* AFI. */
1269 uint16_t afi; /* iana_afi_t */
1270
1271 /* SAFI. */
1272 uint8_t safi; /* iana_safi_t */
1273
1274 /* Pointer to NLRI byte stream. */
1275 uint8_t *nlri;
1276
1277 /* Length of whole NLRI. */
1278 bgp_size_t length;
1279 };
1280
1281 /* BGP versions. */
1282 #define BGP_VERSION_4 4
1283
1284 /* Default BGP port number. */
1285 #define BGP_PORT_DEFAULT 179
1286
1287 /* BGP minimum message size. */
1288 #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1289 #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1290 #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1291 #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1292 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1293 #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1294
1295 /* BGP message types. */
1296 #define BGP_MSG_OPEN 1
1297 #define BGP_MSG_UPDATE 2
1298 #define BGP_MSG_NOTIFY 3
1299 #define BGP_MSG_KEEPALIVE 4
1300 #define BGP_MSG_ROUTE_REFRESH_NEW 5
1301 #define BGP_MSG_CAPABILITY 6
1302 #define BGP_MSG_ROUTE_REFRESH_OLD 128
1303
1304 /* BGP open optional parameter. */
1305 #define BGP_OPEN_OPT_AUTH 1
1306 #define BGP_OPEN_OPT_CAP 2
1307
1308 /* BGP4 attribute type codes. */
1309 #define BGP_ATTR_ORIGIN 1
1310 #define BGP_ATTR_AS_PATH 2
1311 #define BGP_ATTR_NEXT_HOP 3
1312 #define BGP_ATTR_MULTI_EXIT_DISC 4
1313 #define BGP_ATTR_LOCAL_PREF 5
1314 #define BGP_ATTR_ATOMIC_AGGREGATE 6
1315 #define BGP_ATTR_AGGREGATOR 7
1316 #define BGP_ATTR_COMMUNITIES 8
1317 #define BGP_ATTR_ORIGINATOR_ID 9
1318 #define BGP_ATTR_CLUSTER_LIST 10
1319 #define BGP_ATTR_DPA 11
1320 #define BGP_ATTR_ADVERTISER 12
1321 #define BGP_ATTR_RCID_PATH 13
1322 #define BGP_ATTR_MP_REACH_NLRI 14
1323 #define BGP_ATTR_MP_UNREACH_NLRI 15
1324 #define BGP_ATTR_EXT_COMMUNITIES 16
1325 #define BGP_ATTR_AS4_PATH 17
1326 #define BGP_ATTR_AS4_AGGREGATOR 18
1327 #define BGP_ATTR_AS_PATHLIMIT 21
1328 #define BGP_ATTR_PMSI_TUNNEL 22
1329 #define BGP_ATTR_ENCAP 23
1330 #define BGP_ATTR_LARGE_COMMUNITIES 32
1331 #define BGP_ATTR_PREFIX_SID 40
1332 #if ENABLE_BGP_VNC_ATTR
1333 #define BGP_ATTR_VNC 255
1334 #endif
1335
1336 /* BGP update origin. */
1337 #define BGP_ORIGIN_IGP 0
1338 #define BGP_ORIGIN_EGP 1
1339 #define BGP_ORIGIN_INCOMPLETE 2
1340
1341 /* BGP notify message codes. */
1342 #define BGP_NOTIFY_HEADER_ERR 1
1343 #define BGP_NOTIFY_OPEN_ERR 2
1344 #define BGP_NOTIFY_UPDATE_ERR 3
1345 #define BGP_NOTIFY_HOLD_ERR 4
1346 #define BGP_NOTIFY_FSM_ERR 5
1347 #define BGP_NOTIFY_CEASE 6
1348 #define BGP_NOTIFY_CAPABILITY_ERR 7
1349
1350 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1351
1352 /* BGP_NOTIFY_HEADER_ERR sub codes. */
1353 #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1354 #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1355 #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1356
1357 /* BGP_NOTIFY_OPEN_ERR sub codes. */
1358 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1359 #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1360 #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1361 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1362 #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1363 #define BGP_NOTIFY_OPEN_AUTH_FAILURE 5
1364 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1365 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1366
1367 /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1368 #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1369 #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1370 #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1371 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1372 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1373 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1374 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP 7
1375 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1376 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1377 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1378 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1379
1380 /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1381 #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1382 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1383 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1384 #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1385 #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1386 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1387 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1388 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1389
1390 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1391 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION 1
1392 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH 2
1393 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE 3
1394
1395 /* BGP finite state machine status. */
1396 #define Idle 1
1397 #define Connect 2
1398 #define Active 3
1399 #define OpenSent 4
1400 #define OpenConfirm 5
1401 #define Established 6
1402 #define Clearing 7
1403 #define Deleted 8
1404 #define BGP_STATUS_MAX 9
1405
1406 /* BGP finite state machine events. */
1407 #define BGP_Start 1
1408 #define BGP_Stop 2
1409 #define TCP_connection_open 3
1410 #define TCP_connection_closed 4
1411 #define TCP_connection_open_failed 5
1412 #define TCP_fatal_error 6
1413 #define ConnectRetry_timer_expired 7
1414 #define Hold_Timer_expired 8
1415 #define KeepAlive_timer_expired 9
1416 #define Receive_OPEN_message 10
1417 #define Receive_KEEPALIVE_message 11
1418 #define Receive_UPDATE_message 12
1419 #define Receive_NOTIFICATION_message 13
1420 #define Clearing_Completed 14
1421 #define BGP_EVENTS_MAX 15
1422
1423 /* BGP timers default value. */
1424 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1425 #define BGP_INIT_START_TIMER 1
1426 #define BGP_DEFAULT_HOLDTIME DFLT_BGP_HOLDTIME
1427 #define BGP_DEFAULT_KEEPALIVE DFLT_BGP_KEEPALIVE
1428 #define BGP_DEFAULT_EBGP_ROUTEADV 0
1429 #define BGP_DEFAULT_IBGP_ROUTEADV 0
1430 #define BGP_DEFAULT_CONNECT_RETRY DFLT_BGP_TIMERS_CONNECT
1431
1432 /* BGP default local preference. */
1433 #define BGP_DEFAULT_LOCAL_PREF 100
1434
1435 /* BGP local-preference to send when 'bgp graceful-shutdown'
1436 * is configured */
1437 #define BGP_GSHUT_LOCAL_PREF 0
1438
1439 /* BGP default subgroup packet queue max . */
1440 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1441
1442 /* BGP graceful restart */
1443 #define BGP_DEFAULT_RESTART_TIME 120
1444 #define BGP_DEFAULT_STALEPATH_TIME 360
1445
1446 /* BGP uptime string length. */
1447 #define BGP_UPTIME_LEN 25
1448
1449 /* Default configuration settings for bgpd. */
1450 #define BGP_VTY_PORT 2605
1451 #define BGP_DEFAULT_CONFIG "bgpd.conf"
1452
1453 /* BGP Dynamic Neighbors feature */
1454 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1455 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1456 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 5000
1457
1458 /* Flag for peer_clear_soft(). */
1459 enum bgp_clear_type {
1460 BGP_CLEAR_SOFT_NONE,
1461 BGP_CLEAR_SOFT_OUT,
1462 BGP_CLEAR_SOFT_IN,
1463 BGP_CLEAR_SOFT_BOTH,
1464 BGP_CLEAR_SOFT_IN_ORF_PREFIX
1465 };
1466
1467 /* Macros. */
1468 #define BGP_INPUT(P) ((P)->curr)
1469 #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
1470 #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
1471 (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1472
1473 /* BGP error codes. */
1474 #define BGP_SUCCESS 0
1475 #define BGP_ERR_INVALID_VALUE -1
1476 #define BGP_ERR_INVALID_FLAG -2
1477 #define BGP_ERR_INVALID_AS -3
1478 #define BGP_ERR_INVALID_BGP -4
1479 #define BGP_ERR_PEER_GROUP_MEMBER -5
1480 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS -7
1481 #define BGP_ERR_PEER_GROUP_CANT_CHANGE -8
1482 #define BGP_ERR_PEER_GROUP_MISMATCH -9
1483 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT -10
1484 #define BGP_ERR_AS_MISMATCH -12
1485 #define BGP_ERR_PEER_FLAG_CONFLICT -13
1486 #define BGP_ERR_PEER_GROUP_SHUTDOWN -14
1487 #define BGP_ERR_PEER_FILTER_CONFLICT -15
1488 #define BGP_ERR_NOT_INTERNAL_PEER -16
1489 #define BGP_ERR_REMOVE_PRIVATE_AS -17
1490 #define BGP_ERR_AF_UNCONFIGURED -18
1491 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED -19
1492 #define BGP_ERR_INSTANCE_MISMATCH -20
1493 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP -21
1494 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS -22
1495 #define BGP_ERR_TCPSIG_FAILED -23
1496 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK -24
1497 #define BGP_ERR_NO_IBGP_WITH_TTLHACK -25
1498 #define BGP_ERR_NO_INTERFACE_CONFIG -26
1499 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS -27
1500 #define BGP_ERR_AS_OVERRIDE -28
1501 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1502 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS -30
1503 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1504 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER -32
1505 #define BGP_ERR_MAX -33
1506 #define BGP_ERR_INVALID_FOR_DIRECT_PEER -34
1507 #define BGP_ERR_PEER_SAFI_CONFLICT -35
1508
1509 /*
1510 * Enumeration of different policy kinds a peer can be configured with.
1511 */
1512 typedef enum {
1513 BGP_POLICY_ROUTE_MAP,
1514 BGP_POLICY_FILTER_LIST,
1515 BGP_POLICY_PREFIX_LIST,
1516 BGP_POLICY_DISTRIBUTE_LIST,
1517 } bgp_policy_type_e;
1518
1519 /* peer_flag_change_type. */
1520 enum peer_change_type {
1521 peer_change_none,
1522 peer_change_reset,
1523 peer_change_reset_in,
1524 peer_change_reset_out,
1525 };
1526
1527 extern struct bgp_master *bm;
1528 extern unsigned int multipath_num;
1529
1530 /* Prototypes. */
1531 extern void bgp_terminate(void);
1532 extern void bgp_reset(void);
1533 extern time_t bgp_clock(void);
1534 extern void bgp_zclient_reset(void);
1535 extern struct bgp *bgp_get_default(void);
1536 extern struct bgp *bgp_lookup(as_t, const char *);
1537 extern struct bgp *bgp_lookup_by_name(const char *);
1538 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1539 extern struct bgp *bgp_get_evpn(void);
1540 extern void bgp_set_evpn(struct bgp *bgp);
1541 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1542 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1543 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1544 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1545 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1546 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1547 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1548 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1549 union sockunion *,
1550 struct peer_group *);
1551 extern struct prefix *
1552 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1553 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1554 struct prefix *,
1555 struct prefix **);
1556 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1557 union sockunion *);
1558
1559 /*
1560 * Peers are incredibly easy to memory leak
1561 * due to the various ways that they are actually used
1562 * Provide some functionality to debug locks and unlocks
1563 */
1564 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1565 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1566 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1567 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1568
1569 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1570 extern int peer_active(struct peer *);
1571 extern int peer_active_nego(struct peer *);
1572 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1573 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1574 as_t, as_t, int, afi_t, safi_t,
1575 struct peer_group *);
1576 extern struct peer *peer_create_accept(struct bgp *);
1577 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1578 extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
1579 json_object *json);
1580
1581 extern int bgp_config_write(struct vty *);
1582
1583 extern void bgp_master_init(struct thread_master *master,
1584 const int buffer_size);
1585
1586 extern void bgp_init(unsigned short instance);
1587 extern void bgp_pthreads_run(void);
1588 extern void bgp_pthreads_finish(void);
1589 extern void bgp_route_map_init(void);
1590 extern void bgp_session_reset(struct peer *);
1591
1592 extern int bgp_option_set(int);
1593 extern int bgp_option_unset(int);
1594 extern int bgp_option_check(int);
1595
1596 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1597 extern void bgp_instance_up(struct bgp *);
1598 extern void bgp_instance_down(struct bgp *);
1599 extern int bgp_delete(struct bgp *);
1600
1601 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1602 vrf_id_t old_vrf_id, bool create);
1603
1604 extern int bgp_flag_set(struct bgp *, int);
1605 extern int bgp_flag_unset(struct bgp *, int);
1606 extern int bgp_flag_check(struct bgp *, int);
1607
1608 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1609 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1610
1611 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1612 extern int bgp_cluster_id_unset(struct bgp *);
1613
1614 extern int bgp_confederation_id_set(struct bgp *, as_t);
1615 extern int bgp_confederation_id_unset(struct bgp *);
1616 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1617
1618 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1619 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1620
1621 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1622 extern int bgp_timers_unset(struct bgp *);
1623
1624 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1625 extern int bgp_default_local_preference_unset(struct bgp *);
1626
1627 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1628 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1629
1630 extern int bgp_listen_limit_set(struct bgp *, int);
1631 extern int bgp_listen_limit_unset(struct bgp *);
1632
1633 extern int bgp_update_delay_active(struct bgp *);
1634 extern int bgp_update_delay_configured(struct bgp *);
1635 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1636 extern void peer_as_change(struct peer *, as_t, int);
1637 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1638 int, afi_t, safi_t);
1639 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1640 extern int peer_delete(struct peer *peer);
1641 extern int peer_group_delete(struct peer_group *);
1642 extern int peer_group_remote_as_delete(struct peer_group *);
1643 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1644
1645 extern int peer_activate(struct peer *, afi_t, safi_t);
1646 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1647 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1648
1649 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1650 struct peer_group *, as_t *);
1651
1652 extern int peer_flag_set(struct peer *, uint32_t);
1653 extern int peer_flag_unset(struct peer *, uint32_t);
1654 extern void peer_flag_inherit(struct peer *peer, uint32_t flag);
1655
1656 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1657 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1658 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1659 extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
1660 uint32_t flag);
1661 extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
1662 enum peer_change_type type);
1663
1664 extern int peer_ebgp_multihop_set(struct peer *, int);
1665 extern int peer_ebgp_multihop_unset(struct peer *);
1666 extern int is_ebgp_multihop_configured(struct peer *peer);
1667
1668 extern int peer_description_set(struct peer *, const char *);
1669 extern int peer_description_unset(struct peer *);
1670
1671 extern int peer_update_source_if_set(struct peer *, const char *);
1672 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1673 extern int peer_update_source_unset(struct peer *);
1674
1675 extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1676 const char *rmap,
1677 struct route_map *route_map);
1678 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1679
1680 extern int peer_port_set(struct peer *, uint16_t);
1681 extern int peer_port_unset(struct peer *);
1682
1683 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1684 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1685
1686 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1687 uint32_t holdtime);
1688 extern int peer_timers_unset(struct peer *);
1689
1690 extern int peer_timers_connect_set(struct peer *, uint32_t);
1691 extern int peer_timers_connect_unset(struct peer *);
1692
1693 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1694 extern int peer_advertise_interval_unset(struct peer *);
1695
1696 extern void peer_interface_set(struct peer *, const char *);
1697 extern void peer_interface_unset(struct peer *);
1698
1699 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1700 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1701
1702 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1703 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1704
1705 extern int peer_local_as_set(struct peer *, as_t, int, int);
1706 extern int peer_local_as_unset(struct peer *);
1707
1708 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1709 const char *);
1710 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1711
1712 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1713 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1714
1715 extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
1716 const char *name, struct route_map *route_map);
1717 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1718
1719 extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1720 const char *name,
1721 struct route_map *route_map);
1722
1723 extern int peer_password_set(struct peer *, const char *);
1724 extern int peer_password_unset(struct peer *);
1725
1726 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1727
1728 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1729 uint8_t, int, uint16_t);
1730 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1731
1732 extern int peer_clear(struct peer *, struct listnode **);
1733 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1734
1735 extern int peer_ttl_security_hops_set(struct peer *, int);
1736 extern int peer_ttl_security_hops_unset(struct peer *);
1737
1738 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1739 extern int peer_tx_shutdown_message_unset(struct peer *);
1740
1741 extern int bgp_route_map_update_timer(struct thread *thread);
1742 extern void bgp_route_map_terminate(void);
1743
1744 extern int peer_cmp(struct peer *p1, struct peer *p2);
1745
1746 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1747 afi_t *afi, safi_t *safi);
1748 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1749 iana_afi_t *pkt_afi,
1750 iana_safi_t *pkt_safi);
1751
1752 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1753 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1754 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1755
1756 extern void bgp_close(void);
1757 extern void bgp_free(struct bgp *);
1758
1759 static inline struct bgp *bgp_lock(struct bgp *bgp)
1760 {
1761 bgp->lock++;
1762 return bgp;
1763 }
1764
1765 static inline void bgp_unlock(struct bgp *bgp)
1766 {
1767 assert(bgp->lock > 0);
1768 if (--bgp->lock == 0)
1769 bgp_free(bgp);
1770 }
1771
1772 static inline int afindex(afi_t afi, safi_t safi)
1773 {
1774 switch (afi) {
1775 case AFI_IP:
1776 switch (safi) {
1777 case SAFI_UNICAST:
1778 return BGP_AF_IPV4_UNICAST;
1779 break;
1780 case SAFI_MULTICAST:
1781 return BGP_AF_IPV4_MULTICAST;
1782 break;
1783 case SAFI_LABELED_UNICAST:
1784 return BGP_AF_IPV4_LBL_UNICAST;
1785 break;
1786 case SAFI_MPLS_VPN:
1787 return BGP_AF_IPV4_VPN;
1788 break;
1789 case SAFI_ENCAP:
1790 return BGP_AF_IPV4_ENCAP;
1791 break;
1792 case SAFI_FLOWSPEC:
1793 return BGP_AF_IPV4_FLOWSPEC;
1794 default:
1795 return BGP_AF_MAX;
1796 break;
1797 }
1798 break;
1799 case AFI_IP6:
1800 switch (safi) {
1801 case SAFI_UNICAST:
1802 return BGP_AF_IPV6_UNICAST;
1803 break;
1804 case SAFI_MULTICAST:
1805 return BGP_AF_IPV6_MULTICAST;
1806 break;
1807 case SAFI_LABELED_UNICAST:
1808 return BGP_AF_IPV6_LBL_UNICAST;
1809 break;
1810 case SAFI_MPLS_VPN:
1811 return BGP_AF_IPV6_VPN;
1812 break;
1813 case SAFI_ENCAP:
1814 return BGP_AF_IPV6_ENCAP;
1815 break;
1816 case SAFI_FLOWSPEC:
1817 return BGP_AF_IPV6_FLOWSPEC;
1818 default:
1819 return BGP_AF_MAX;
1820 break;
1821 }
1822 break;
1823 case AFI_L2VPN:
1824 switch (safi) {
1825 case SAFI_EVPN:
1826 return BGP_AF_L2VPN_EVPN;
1827 break;
1828 default:
1829 return BGP_AF_MAX;
1830 break;
1831 }
1832 default:
1833 return BGP_AF_MAX;
1834 break;
1835 }
1836 }
1837
1838 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1839 static inline int peer_group_active(struct peer *peer)
1840 {
1841 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1842 return 1;
1843 return 0;
1844 }
1845
1846 /* If peer is negotiated at least one address family return 1. */
1847 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1848 {
1849 if (peer->afc_nego[afi][SAFI_UNICAST]
1850 || peer->afc_nego[afi][SAFI_MULTICAST]
1851 || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1852 || peer->afc_nego[afi][SAFI_MPLS_VPN]
1853 || peer->afc_nego[afi][SAFI_ENCAP]
1854 || peer->afc_nego[afi][SAFI_FLOWSPEC]
1855 || peer->afc_nego[afi][SAFI_EVPN])
1856 return 1;
1857 return 0;
1858 }
1859
1860 /* If at least one address family activated for group, return 1. */
1861 static inline int peer_group_af_configured(struct peer_group *group)
1862 {
1863 struct peer *peer = group->conf;
1864
1865 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1866 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1867 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1868 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1869 || peer->afc[AFI_IP6][SAFI_UNICAST]
1870 || peer->afc[AFI_IP6][SAFI_MULTICAST]
1871 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1872 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1873 || peer->afc[AFI_IP6][SAFI_ENCAP]
1874 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1875 || peer->afc[AFI_L2VPN][SAFI_EVPN])
1876 return 1;
1877 return 0;
1878 }
1879
1880 static inline char *timestamp_string(time_t ts)
1881 {
1882 time_t tbuf;
1883 tbuf = time(NULL) - (bgp_clock() - ts);
1884 return ctime(&tbuf);
1885 }
1886
1887 static inline int peer_established(struct peer *peer)
1888 {
1889 if (peer->status == Established)
1890 return 1;
1891 return 0;
1892 }
1893
1894 static inline int peer_dynamic_neighbor(struct peer *peer)
1895 {
1896 return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1897 }
1898
1899 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1900 {
1901 return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1902 }
1903
1904 /* Lookup VRF for BGP instance based on its type. */
1905 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1906 {
1907 struct vrf *vrf;
1908
1909 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1910 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1911 else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1912 vrf = vrf_lookup_by_name(bgp->name);
1913 else
1914 vrf = NULL;
1915
1916 return vrf;
1917 }
1918
1919 /* Link BGP instance to VRF. */
1920 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1921 {
1922 bgp->vrf_id = vrf->vrf_id;
1923 if (vrf->info != (void *)bgp)
1924 vrf->info = (void *)bgp_lock(bgp);
1925 }
1926
1927 /* Unlink BGP instance from VRF. */
1928 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1929 {
1930 if (vrf->info == (void *)bgp) {
1931 vrf->info = NULL;
1932 bgp_unlock(bgp);
1933 }
1934 bgp->vrf_id = VRF_UNKNOWN;
1935 }
1936
1937 extern void bgp_unset_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1938
1939 /* For benefit of rfapi */
1940 extern struct peer *peer_new(struct bgp *bgp);
1941
1942 extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
1943 const char *ip_str, bool use_json);
1944
1945 /* Hooks */
1946 DECLARE_HOOK(peer_status_changed, (struct peer * peer), (peer))
1947
1948 #endif /* _QUAGGA_BGPD_H */
FRRouting mirror