Line data Source code
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 "srv6.h"
33 : #include "iana_afi.h"
34 :
35 : /* For union sockunion. */
36 : #include "queue.h"
37 : #include "sockunion.h"
38 : #include "routemap.h"
39 : #include "linklist.h"
40 : #include "defaults.h"
41 : #include "bgp_memory.h"
42 : #include "bitfield.h"
43 : #include "vxlan.h"
44 : #include "bgp_labelpool.h"
45 : #include "bgp_addpath_types.h"
46 : #include "bgp_nexthop.h"
47 : #include "bgp_io.h"
48 :
49 : #include "lib/bfd.h"
50 :
51 : #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
52 : #define BGP_PEER_MAX_HASH_SIZE 16384
53 :
54 : /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
55 : #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
56 :
57 : struct update_subgroup;
58 : struct bpacket;
59 : struct bgp_pbr_config;
60 :
61 : /*
62 : * Allow the neighbor XXXX remote-as to take internal or external
63 : * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
64 : * behavior
65 : * in the system.
66 : */
67 : enum { AS_UNSPECIFIED = 0,
68 : AS_SPECIFIED,
69 : AS_INTERNAL,
70 : AS_EXTERNAL,
71 : };
72 :
73 : /* Zebra Gracaful Restart states */
74 : enum zebra_gr_mode {
75 : ZEBRA_GR_DISABLE = 0,
76 : ZEBRA_GR_ENABLE
77 : };
78 :
79 : /* Typedef BGP specific types. */
80 : typedef uint32_t as_t;
81 : typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
82 : typedef uint16_t bgp_size_t;
83 :
84 : enum bgp_af_index {
85 : BGP_AF_START,
86 : BGP_AF_IPV4_UNICAST = BGP_AF_START,
87 : BGP_AF_IPV4_MULTICAST,
88 : BGP_AF_IPV4_VPN,
89 : BGP_AF_IPV6_UNICAST,
90 : BGP_AF_IPV6_MULTICAST,
91 : BGP_AF_IPV6_VPN,
92 : BGP_AF_IPV4_ENCAP,
93 : BGP_AF_IPV6_ENCAP,
94 : BGP_AF_L2VPN_EVPN,
95 : BGP_AF_IPV4_LBL_UNICAST,
96 : BGP_AF_IPV6_LBL_UNICAST,
97 : BGP_AF_IPV4_FLOWSPEC,
98 : BGP_AF_IPV6_FLOWSPEC,
99 : BGP_AF_MAX
100 : };
101 :
102 : #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
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 : /* Listening sockets */
119 : struct list *listen_sockets;
120 :
121 : /* BGP port number. */
122 : uint16_t port;
123 :
124 : /* Listener addresses */
125 : struct list *addresses;
126 :
127 : /* The Mac table */
128 : struct hash *self_mac_hash;
129 :
130 : /* BGP start time. */
131 : time_t start_time;
132 :
133 : /* Various BGP global configuration. */
134 : uint8_t options;
135 :
136 : #define BGP_OPT_NO_FIB (1 << 0)
137 : #define BGP_OPT_NO_LISTEN (1 << 1)
138 : #define BGP_OPT_NO_ZEBRA (1 << 2)
139 :
140 : uint64_t updgrp_idspace;
141 : uint64_t subgrp_idspace;
142 :
143 : /* timer to dampen route map changes */
144 : struct thread *t_rmap_update; /* Handle route map updates */
145 : uint32_t rmap_update_timer; /* Route map update timer */
146 : #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
147 :
148 : /* Id space for automatic RD derivation for an EVI/VRF */
149 : bitfield_t rd_idspace;
150 :
151 : /* dynamic mpls label allocation pool */
152 : struct labelpool labelpool;
153 :
154 : /* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
155 : struct bgp* bgp_evpn;
156 :
157 : /* How big should we set the socket buffer size */
158 : uint32_t socket_buffer;
159 :
160 : /* Should we do wait for fib install globally? */
161 : bool wait_for_fib;
162 :
163 : /* EVPN multihoming */
164 : struct bgp_evpn_mh_info *mh_info;
165 :
166 : /* global update-delay timer values */
167 : uint16_t v_update_delay;
168 : uint16_t v_establish_wait;
169 :
170 : uint32_t flags;
171 : #define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
172 : #define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)
173 :
174 : bool terminating; /* global flag that sigint terminate seen */
175 :
176 : /* DSCP value for TCP sessions */
177 : uint8_t tcp_dscp;
178 :
179 : #define BM_DEFAULT_Q_LIMIT 10000
180 : uint32_t inq_limit;
181 : uint32_t outq_limit;
182 :
183 : QOBJ_FIELDS;
184 : };
185 : DECLARE_QOBJ_TYPE(bgp_master);
186 :
187 : /* BGP route-map structure. */
188 : struct bgp_rmap {
189 : char *name;
190 : struct route_map *map;
191 : };
192 :
193 : struct bgp_redist {
194 : unsigned short instance;
195 :
196 : /* BGP redistribute metric configuration. */
197 : uint8_t redist_metric_flag;
198 : uint32_t redist_metric;
199 :
200 : /* BGP redistribute route-map. */
201 : struct bgp_rmap rmap;
202 : };
203 :
204 : enum vpn_policy_direction {
205 : BGP_VPN_POLICY_DIR_FROMVPN = 0,
206 : BGP_VPN_POLICY_DIR_TOVPN = 1,
207 : BGP_VPN_POLICY_DIR_MAX = 2
208 : };
209 :
210 : struct vpn_policy {
211 : struct bgp *bgp; /* parent */
212 : afi_t afi;
213 : struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
214 : struct ecommunity *import_redirect_rtlist;
215 : char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
216 : struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
217 :
218 : /* should be mpls_label_t? */
219 : uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
220 : uint32_t tovpn_zebra_vrf_label_last_sent;
221 : struct prefix_rd tovpn_rd;
222 : struct prefix tovpn_nexthop; /* unset => set to 0 */
223 : uint32_t flags;
224 : #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
225 : #define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
226 : #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
227 : #define BGP_VPN_POLICY_TOVPN_SID_AUTO (1 << 3)
228 :
229 : /*
230 : * If we are importing another vrf into us keep a list of
231 : * vrf names that are being imported into us.
232 : */
233 : struct list *import_vrf;
234 :
235 : /*
236 : * if we are being exported to another vrf keep a list of
237 : * vrf names that we are being exported to.
238 : */
239 : struct list *export_vrf;
240 :
241 : /*
242 : * Segment-Routing SRv6 Mode
243 : */
244 : uint32_t tovpn_sid_index; /* unset => set to 0 */
245 : struct in6_addr *tovpn_sid;
246 : struct srv6_locator_chunk *tovpn_sid_locator;
247 : uint32_t tovpn_sid_transpose_label;
248 : struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
249 : };
250 :
251 : /*
252 : * Type of 'struct bgp'.
253 : * - Default: The default instance
254 : * - VRF: A specific (non-default) VRF
255 : * - View: An instance used for route exchange
256 : * The "default" instance is treated separately to simplify the code. Note
257 : * that if deployed in a Multi-VRF environment, it may not exist.
258 : */
259 : enum bgp_instance_type {
260 : BGP_INSTANCE_TYPE_DEFAULT,
261 : BGP_INSTANCE_TYPE_VRF,
262 : BGP_INSTANCE_TYPE_VIEW
263 : };
264 :
265 : #define BGP_SEND_EOR(bgp, afi, safi) \
266 : (!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
267 : && ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
268 : || (bgp->gr_info[afi][safi].eor_required \
269 : == bgp->gr_info[afi][safi].eor_received)))
270 :
271 : /* BGP GR Global ds */
272 :
273 : #define BGP_GLOBAL_GR_MODE 4
274 : #define BGP_GLOBAL_GR_EVENT_CMD 4
275 :
276 : /* Graceful restart selection deferral timer info */
277 : struct graceful_restart_info {
278 : /* Count of EOR message expected */
279 : uint32_t eor_required;
280 : /* Count of EOR received */
281 : uint32_t eor_received;
282 : /* Deferral Timer */
283 : struct thread *t_select_deferral;
284 : /* Routes Deferred */
285 : uint32_t gr_deferred;
286 : /* Best route select */
287 : struct thread *t_route_select;
288 : /* AFI, SAFI enabled */
289 : bool af_enabled[AFI_MAX][SAFI_MAX];
290 : /* Route update completed */
291 : bool route_sync[AFI_MAX][SAFI_MAX];
292 : };
293 :
294 : enum global_mode {
295 : GLOBAL_HELPER = 0, /* This is the default mode */
296 : GLOBAL_GR,
297 : GLOBAL_DISABLE,
298 : GLOBAL_INVALID
299 : };
300 :
301 : enum global_gr_command {
302 : GLOBAL_GR_CMD = 0,
303 : NO_GLOBAL_GR_CMD,
304 : GLOBAL_DISABLE_CMD,
305 : NO_GLOBAL_DISABLE_CMD
306 : };
307 :
308 : #define BGP_GR_SUCCESS 0
309 : #define BGP_GR_FAILURE 1
310 :
311 : /* Handling of BGP link bandwidth (LB) on receiver - whether and how to
312 : * do weighted ECMP. Note: This applies after multipath computation.
313 : */
314 : enum bgp_link_bw_handling {
315 : /* Do ECMP if some paths don't have LB - default */
316 : BGP_LINK_BW_ECMP,
317 : /* Completely ignore LB, just do regular ECMP */
318 : BGP_LINK_BW_IGNORE_BW,
319 : /* Skip paths without LB, do wECMP on others */
320 : BGP_LINK_BW_SKIP_MISSING,
321 : /* Do wECMP with default weight for paths not having LB */
322 : BGP_LINK_BW_DEFWT_4_MISSING
323 : };
324 :
325 : RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
326 0 : RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
327 :
328 : struct bgp_snmp_stats {
329 : /* SNMP variables for mplsL3Vpn*/
330 : time_t creation_time;
331 : time_t modify_time;
332 : bool active;
333 : uint32_t routes_added;
334 : uint32_t routes_deleted;
335 : };
336 :
337 : struct bgp_srv6_function {
338 : struct in6_addr sid;
339 : char locator_name[SRV6_LOCNAME_SIZE];
340 : };
341 :
342 : /* BGP instance structure. */
343 : struct bgp {
344 : /* AS number of this BGP instance. */
345 : as_t as;
346 :
347 : /* Name of this BGP instance. */
348 : char *name;
349 : char *name_pretty; /* printable "VRF|VIEW name|default" */
350 :
351 : /* Type of instance and VRF id. */
352 : enum bgp_instance_type inst_type;
353 : vrf_id_t vrf_id;
354 :
355 : /* Reference count to allow peer_delete to finish after bgp_delete */
356 : int lock;
357 :
358 : /* Self peer. */
359 : struct peer *peer_self;
360 :
361 : /* BGP peer. */
362 : struct list *peer;
363 : struct hash *peerhash;
364 :
365 : /* BGP peer group. */
366 : struct list *group;
367 :
368 : /* The maximum number of BGP dynamic neighbors that can be created */
369 : int dynamic_neighbors_limit;
370 :
371 : /* The current number of BGP dynamic neighbors */
372 : int dynamic_neighbors_count;
373 :
374 : struct hash *update_groups[BGP_AF_MAX];
375 :
376 : /*
377 : * Global statistics for update groups.
378 : */
379 : struct {
380 : uint32_t join_events;
381 : uint32_t prune_events;
382 : uint32_t merge_events;
383 : uint32_t split_events;
384 : uint32_t updgrp_switch_events;
385 : uint32_t peer_refreshes_combined;
386 : uint32_t adj_count;
387 : uint32_t merge_checks_triggered;
388 :
389 : uint32_t updgrps_created;
390 : uint32_t updgrps_deleted;
391 : uint32_t subgrps_created;
392 : uint32_t subgrps_deleted;
393 : } update_group_stats;
394 :
395 : struct bgp_snmp_stats *snmp_stats;
396 :
397 : /* BGP configuration. */
398 : uint16_t config;
399 : #define BGP_CONFIG_CLUSTER_ID (1 << 0)
400 : #define BGP_CONFIG_CONFEDERATION (1 << 1)
401 :
402 : /* BGP router identifier. */
403 : struct in_addr router_id;
404 : struct in_addr router_id_static;
405 : struct in_addr router_id_zebra;
406 :
407 : /* BGP route reflector cluster ID. */
408 : struct in_addr cluster_id;
409 :
410 : /* BGP confederation information. */
411 : as_t confed_id;
412 : as_t *confed_peers;
413 : int confed_peers_cnt;
414 :
415 : struct thread
416 : *t_startup; /* start-up timer on only once at the beginning */
417 :
418 : uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
419 : #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
420 : uint32_t maxmed_onstartup_value; /* Max-med value when active on
421 : start-up */
422 : struct thread
423 : *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
424 : uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
425 :
426 : bool v_maxmed_admin; /* true/false if max-med administrative is on/off
427 : */
428 : #define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
429 : uint32_t maxmed_admin_value; /* Max-med value when administrative in on
430 : */
431 : #define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
432 :
433 : uint8_t maxmed_active; /* 1/0 if max-med is active or not */
434 : uint32_t maxmed_value; /* Max-med value when its active */
435 :
436 : /* BGP update delay on startup */
437 : struct thread *t_update_delay;
438 : struct thread *t_establish_wait;
439 : struct thread *t_revalidate[AFI_MAX][SAFI_MAX];
440 :
441 : uint8_t update_delay_over;
442 : uint8_t main_zebra_update_hold;
443 : uint8_t main_peers_update_hold;
444 : uint16_t v_update_delay;
445 : uint16_t v_establish_wait;
446 : char update_delay_begin_time[64];
447 : char update_delay_end_time[64];
448 : char update_delay_zebra_resume_time[64];
449 : char update_delay_peers_resume_time[64];
450 : uint32_t established;
451 : uint32_t restarted_peers;
452 : uint32_t implicit_eors;
453 : uint32_t explicit_eors;
454 : #define BGP_UPDATE_DELAY_DEF 0
455 : #define BGP_UPDATE_DELAY_MIN 0
456 : #define BGP_UPDATE_DELAY_MAX 3600
457 :
458 : /* Reference bandwidth for BGP link-bandwidth. Used when
459 : * the LB value has to be computed based on some other
460 : * factor (e.g., number of multipaths for the prefix)
461 : * Value is in Mbps
462 : */
463 : uint32_t lb_ref_bw;
464 : #define BGP_LINK_BW_REF_BW 1
465 :
466 : /* BGP flags. */
467 : uint64_t flags;
468 : #define BGP_FLAG_ALWAYS_COMPARE_MED (1ULL << 0)
469 : #define BGP_FLAG_DETERMINISTIC_MED (1ULL << 1)
470 : #define BGP_FLAG_MED_MISSING_AS_WORST (1ULL << 2)
471 : #define BGP_FLAG_MED_CONFED (1ULL << 3)
472 : #define BGP_FLAG_NO_CLIENT_TO_CLIENT (1ULL << 4)
473 : #define BGP_FLAG_COMPARE_ROUTER_ID (1ULL << 5)
474 : #define BGP_FLAG_ASPATH_IGNORE (1ULL << 6)
475 : #define BGP_FLAG_IMPORT_CHECK (1ULL << 7)
476 : #define BGP_FLAG_NO_FAST_EXT_FAILOVER (1ULL << 8)
477 : #define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1ULL << 9)
478 :
479 : /* This flag is set when we have full BGP Graceful-Restart mode enable */
480 : #define BGP_FLAG_GRACEFUL_RESTART (1ULL << 10)
481 :
482 : #define BGP_FLAG_ASPATH_CONFED (1ULL << 11)
483 : #define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1ULL << 12)
484 : #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1ULL << 13)
485 : #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1ULL << 14)
486 : #define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1ULL << 15)
487 : #define BGP_FLAG_FORCE_STATIC_PROCESS (1ULL << 16)
488 : #define BGP_FLAG_SHOW_HOSTNAME (1ULL << 17)
489 : #define BGP_FLAG_GR_PRESERVE_FWD (1ULL << 18)
490 : #define BGP_FLAG_GRACEFUL_SHUTDOWN (1ULL << 19)
491 : #define BGP_FLAG_DELETE_IN_PROGRESS (1ULL << 20)
492 : #define BGP_FLAG_SELECT_DEFER_DISABLE (1ULL << 21)
493 : #define BGP_FLAG_GR_DISABLE_EOR (1ULL << 22)
494 : #define BGP_FLAG_EBGP_REQUIRES_POLICY (1ULL << 23)
495 : #define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1ULL << 24)
496 :
497 : /* This flag is set if the instance is in administrative shutdown */
498 : #define BGP_FLAG_SHUTDOWN (1ULL << 25)
499 : #define BGP_FLAG_SUPPRESS_FIB_PENDING (1ULL << 26)
500 : #define BGP_FLAG_SUPPRESS_DUPLICATES (1ULL << 27)
501 : #define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1ULL << 29)
502 : /* Indicate Graceful Restart support for BGP NOTIFICATION messages */
503 : #define BGP_FLAG_GRACEFUL_NOTIFICATION (1ULL << 30)
504 : /* Send Hard Reset CEASE Notification for 'Administrative Reset' */
505 : #define BGP_FLAG_HARD_ADMIN_RESET (1ULL << 31)
506 : /* Evaluate the AIGP attribute during the best path selection process */
507 : #define BGP_FLAG_COMPARE_AIGP (1ULL << 32)
508 :
509 : /* BGP default address-families.
510 : * New peers inherit enabled afi/safis from bgp instance.
511 : */
512 : uint16_t default_af[AFI_MAX][SAFI_MAX];
513 :
514 : enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
515 : [BGP_GLOBAL_GR_EVENT_CMD];
516 : enum global_mode global_gr_present_state;
517 :
518 : /* This variable stores the current Graceful Restart state of Zebra
519 : * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
520 : */
521 : enum zebra_gr_mode present_zebra_gr_state;
522 :
523 : /* BGP Per AF flags */
524 : uint16_t af_flags[AFI_MAX][SAFI_MAX];
525 : #define BGP_CONFIG_DAMPENING (1 << 0)
526 : /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
527 : #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
528 : #define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
529 : #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
530 : #define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
531 : #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
532 : #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
533 : /* import/export between address families */
534 : #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
535 : #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
536 : /* vrf-route leaking flags */
537 : #define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
538 : #define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
539 : /* vpnvx retain flag */
540 : #define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
541 :
542 : /* BGP per AF peer count */
543 : uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
544 :
545 : /* Tree for next-hop lookup cache. */
546 : struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
547 :
548 : /* Tree for import-check */
549 : struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
550 :
551 : struct bgp_table *connected_table[AFI_MAX];
552 :
553 : struct hash *address_hash;
554 :
555 : /* DB for all local tunnel-ips - used mainly for martian checks
556 : Currently it only has all VxLan tunnel IPs*/
557 : struct hash *tip_hash;
558 :
559 : /* Static route configuration. */
560 : struct bgp_table *route[AFI_MAX][SAFI_MAX];
561 :
562 : /* Aggregate address configuration. */
563 : struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
564 :
565 : /* BGP routing information base. */
566 : struct bgp_table *rib[AFI_MAX][SAFI_MAX];
567 :
568 : /* BGP table route-map. */
569 : struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
570 :
571 : /* BGP redistribute configuration. */
572 : struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
573 :
574 : /* Allocate MPLS labels */
575 : uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
576 :
577 : /* Allocate hash entries to store policy routing information
578 : * The hash are used to host pbr rules somewhere.
579 : * Actually, pbr will only be used by flowspec
580 : * those hash elements will have relationship together as
581 : * illustrated in below diagram:
582 : *
583 : * pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
584 : * <----- pbr_match j <--- pbr_match_entry 1..m
585 : * <----- pbr_rule k
586 : *
587 : * - here in BGP structure, the list of match and actions will
588 : * stand for the list of ipset sets, and table_ids in the kernel
589 : * - the arrow above between pbr_match and pbr_action indicate
590 : * that a backpointer permits match to find the action
591 : * - the arrow betwen match_entry and match is a hash list
592 : * contained in match, that lists the whole set of entries
593 : */
594 : struct hash *pbr_match_hash;
595 : struct hash *pbr_rule_hash;
596 : struct hash *pbr_action_hash;
597 :
598 : /* timer to re-evaluate neighbor default-originate route-maps */
599 : struct thread *t_rmap_def_originate_eval;
600 : #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
601 :
602 : /* BGP distance configuration. */
603 : uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
604 : uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
605 : uint8_t distance_local[AFI_MAX][SAFI_MAX];
606 :
607 : /* BGP default local-preference. */
608 : uint32_t default_local_pref;
609 :
610 : /* BGP default subgroup pkt queue max */
611 : uint32_t default_subgroup_pkt_queue_max;
612 :
613 : /* BGP default timer. */
614 : uint32_t default_holdtime;
615 : uint32_t default_keepalive;
616 : uint32_t default_connect_retry;
617 : uint32_t default_delayopen;
618 :
619 : /* BGP minimum holdtime. */
620 : uint16_t default_min_holdtime;
621 :
622 : /* BGP graceful restart */
623 : uint32_t restart_time;
624 : uint32_t stalepath_time;
625 : uint32_t select_defer_time;
626 : struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
627 : uint32_t rib_stale_time;
628 :
629 : /* BGP Long-lived Graceful Restart */
630 : uint32_t llgr_stale_time;
631 :
632 : #define BGP_ROUTE_SELECT_DELAY 1
633 : #define BGP_MAX_BEST_ROUTE_SELECT 10000
634 : /* Maximum-paths configuration */
635 : struct bgp_maxpaths_cfg {
636 : uint16_t maxpaths_ebgp;
637 : uint16_t maxpaths_ibgp;
638 : bool same_clusterlen;
639 : } maxpaths[AFI_MAX][SAFI_MAX];
640 :
641 : _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
642 : _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
643 :
644 : /* Automatic coalesce adjust on/off */
645 : bool heuristic_coalesce;
646 : /* Actual coalesce time */
647 : uint32_t coalesce_time;
648 :
649 : /* Auto-shutdown new peers */
650 : bool autoshutdown;
651 :
652 : struct bgp_addpath_bgp_data tx_addpath;
653 :
654 : #ifdef ENABLE_BGP_VNC
655 : struct rfapi_cfg *rfapi_cfg;
656 : struct rfapi *rfapi;
657 : #endif
658 :
659 : /* EVPN related information */
660 :
661 : /* EVI hash table */
662 : struct hash *vnihash;
663 :
664 : /*
665 : * VNI hash table based on SVI ifindex as its key.
666 : * We use SVI ifindex as key to lookup a VNI table for gateway IP
667 : * overlay index recursive lookup.
668 : * For this purpose, a hashtable is added which optimizes this lookup.
669 : */
670 : struct hash *vni_svi_hash;
671 :
672 : /* EVPN enable - advertise gateway macip routes */
673 : int advertise_gw_macip;
674 :
675 : /* EVPN enable - advertise local VNIs and their MACs etc. */
676 : int advertise_all_vni;
677 :
678 : /* draft-ietf-idr-deprecate-as-set-confed-set
679 : * Reject aspaths with AS_SET and/or AS_CONFED_SET.
680 : */
681 : bool reject_as_sets;
682 :
683 : struct bgp_evpn_info *evpn_info;
684 :
685 : /* EVPN - use RFC 8365 to auto-derive RT */
686 : int advertise_autort_rfc8365;
687 :
688 : /*
689 : * Flooding mechanism for BUM packets for VxLAN-EVPN.
690 : */
691 : enum vxlan_flood_control vxlan_flood_ctrl;
692 :
693 : /* Hash table of Import RTs to EVIs */
694 : struct hash *import_rt_hash;
695 :
696 : /* Hash table of VRF import RTs to VRFs */
697 : struct hash *vrf_import_rt_hash;
698 :
699 : /* L3-VNI corresponding to this vrf */
700 : vni_t l3vni;
701 :
702 : /* router-mac to be used in mac-ip routes for this vrf */
703 : struct ethaddr rmac;
704 :
705 : /* originator ip - to be used as NH for type-5 routes */
706 : struct in_addr originator_ip;
707 :
708 : /* SVI associated with the L3-VNI corresponding to this vrf */
709 : ifindex_t l3vni_svi_ifindex;
710 :
711 : /* RB tree of ES-VRFs */
712 : struct bgp_es_vrf_rb_head es_vrf_rb_tree;
713 :
714 : /* Hash table of EVPN nexthops maintained per-tenant-VRF */
715 : struct hash *evpn_nh_table;
716 :
717 : /*
718 : * Flag resolve_overlay_index is used for recursive resolution
719 : * procedures for EVPN type-5 route's gateway IP overlay index.
720 : * When this flag is set, we build remote-ip-hash for
721 : * all L2VNIs and resolve overlay index nexthops using this hash.
722 : * Overlay index nexthops remain unresolved if this flag is not set.
723 : */
724 : bool resolve_overlay_index;
725 :
726 : /* vrf flags */
727 : uint32_t vrf_flags;
728 : #define BGP_VRF_AUTO (1 << 0)
729 : #define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
730 : #define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
731 : #define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
732 : #define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
733 : #define BGP_VRF_RD_CFGD (1 << 5)
734 : #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
735 : /* per-VRF toVPN SID */
736 : #define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
737 :
738 : /* unique ID for auto derivation of RD for this vrf */
739 : uint16_t vrf_rd_id;
740 :
741 : /* Automatically derived RD for this VRF */
742 : struct prefix_rd vrf_prd_auto;
743 :
744 : /* RD for this VRF */
745 : struct prefix_rd vrf_prd;
746 :
747 : /* import rt list for the vrf instance */
748 : struct list *vrf_import_rtl;
749 :
750 : /* export rt list for the vrf instance */
751 : struct list *vrf_export_rtl;
752 :
753 : /* list of corresponding l2vnis (struct bgpevpn) */
754 : struct list *l2vnis;
755 :
756 : /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
757 : struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
758 :
759 : struct vpn_policy vpn_policy[AFI_MAX];
760 :
761 : struct bgp_pbr_config *bgp_pbr_cfg;
762 :
763 : /* Count of peers in established state */
764 : uint32_t established_peers;
765 :
766 : /* Weighted ECMP related config. */
767 : enum bgp_link_bw_handling lb_handling;
768 :
769 : /* Process Queue for handling routes */
770 : struct work_queue *process_queue;
771 :
772 : bool fast_convergence;
773 :
774 : /* BGP Conditional advertisement */
775 : uint32_t condition_check_period;
776 : uint32_t condition_filter_count;
777 : struct thread *t_condition_check;
778 :
779 : /* BGP VPN SRv6 backend */
780 : bool srv6_enabled;
781 : char srv6_locator_name[SRV6_LOCNAME_SIZE];
782 : struct list *srv6_locator_chunks;
783 : struct list *srv6_functions;
784 : uint32_t tovpn_sid_index; /* unset => set to 0 */
785 : struct in6_addr *tovpn_sid;
786 : struct srv6_locator_chunk *tovpn_sid_locator;
787 : uint32_t tovpn_sid_transpose_label;
788 : struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
789 :
790 : /* TCP keepalive parameters for BGP connection */
791 : uint16_t tcp_keepalive_idle;
792 : uint16_t tcp_keepalive_intvl;
793 : uint16_t tcp_keepalive_probes;
794 :
795 : struct timeval ebgprequirespolicywarning;
796 : #define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
797 :
798 : bool allow_martian;
799 :
800 : QOBJ_FIELDS;
801 : };
802 : DECLARE_QOBJ_TYPE(bgp);
803 :
804 : struct bgp_interface {
805 : #define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
806 : uint32_t flags;
807 : };
808 :
809 : DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
810 : DECLARE_HOOK(bgp_inst_config_write,
811 : (struct bgp *bgp, struct vty *vty),
812 : (bgp, vty));
813 : DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
814 :
815 : /* Thread callback information */
816 : struct afi_safi_info {
817 : afi_t afi;
818 : safi_t safi;
819 : struct bgp *bgp;
820 : };
821 :
822 : #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
823 :
824 : #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
825 : (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
826 : || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
827 : && bgp->vrf_id != VRF_UNKNOWN))
828 :
829 : #define BGP_SELECT_DEFER_DISABLE(bgp) \
830 : (CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
831 :
832 : #define BGP_SUPPRESS_FIB_ENABLED(bgp) \
833 : (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
834 : || bm->wait_for_fib)
835 :
836 : /* BGP peer-group support. */
837 : struct peer_group {
838 : /* Name of the peer-group. */
839 : char *name;
840 :
841 : /* Pointer to BGP. */
842 : struct bgp *bgp;
843 :
844 : /* Peer-group client list. */
845 : struct list *peer;
846 :
847 : /** Dynamic neighbor listening ranges */
848 : struct list *listen_range[AFI_MAX];
849 :
850 : /* Peer-group config */
851 : struct peer *conf;
852 : };
853 :
854 : /* BGP Notify message format. */
855 : struct bgp_notify {
856 : uint8_t code;
857 : uint8_t subcode;
858 : char *data;
859 : bgp_size_t length;
860 : uint8_t *raw_data;
861 : bool hard_reset;
862 : };
863 :
864 : /* Next hop self address. */
865 : struct bgp_nexthop {
866 : struct interface *ifp;
867 : struct in_addr v4;
868 : struct in6_addr v6_global;
869 : struct in6_addr v6_local;
870 : };
871 :
872 : /* BGP addpath values */
873 : #define BGP_ADDPATH_RX 1
874 : #define BGP_ADDPATH_TX 2
875 : #define BGP_ADDPATH_ID_LEN 4
876 :
877 : #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
878 :
879 : /* Route map direction */
880 : #define RMAP_IN 0
881 : #define RMAP_OUT 1
882 : #define RMAP_MAX 2
883 :
884 : #define BGP_DEFAULT_TTL 1
885 : #define BGP_GTSM_HOPS_DISABLED 0
886 : #define BGP_GTSM_HOPS_CONNECTED 1
887 :
888 : /* Advertise map */
889 : #define CONDITION_NON_EXIST false
890 : #define CONDITION_EXIST true
891 :
892 : enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
893 :
894 : #include "filter.h"
895 :
896 : /* BGP filter structure. */
897 : struct bgp_filter {
898 : /* Distribute-list. */
899 : struct {
900 : char *name;
901 : struct access_list *alist;
902 : } dlist[FILTER_MAX];
903 :
904 : /* Prefix-list. */
905 : struct {
906 : char *name;
907 : struct prefix_list *plist;
908 : } plist[FILTER_MAX];
909 :
910 : /* Filter-list. */
911 : struct {
912 : char *name;
913 : struct as_list *aslist;
914 : } aslist[FILTER_MAX];
915 :
916 : /* Route-map. */
917 : struct {
918 : char *name;
919 : struct route_map *map;
920 : } map[RMAP_MAX];
921 :
922 : /* Unsuppress-map. */
923 : struct {
924 : char *name;
925 : struct route_map *map;
926 : } usmap;
927 :
928 : /* Advertise-map */
929 : struct {
930 : char *aname;
931 : struct route_map *amap;
932 :
933 : bool condition;
934 :
935 : char *cname;
936 : struct route_map *cmap;
937 :
938 : enum update_type update_type;
939 : } advmap;
940 : };
941 :
942 : /* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
943 : a peer who's AS is part of our Confederation. */
944 : enum bgp_peer_sort {
945 : BGP_PEER_UNSPECIFIED,
946 : BGP_PEER_IBGP,
947 : BGP_PEER_EBGP,
948 : BGP_PEER_INTERNAL,
949 : BGP_PEER_CONFED,
950 : };
951 :
952 : /* BGP message header and packet size. */
953 : #define BGP_MARKER_SIZE 16
954 : #define BGP_HEADER_SIZE 19
955 : #define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
956 : #define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
957 : #define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
958 : #define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
959 :
960 : /*
961 : * Trigger delay for bgp_announce_route().
962 : */
963 : #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
964 : #define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
965 :
966 : struct peer_af {
967 : /* back pointer to the peer */
968 : struct peer *peer;
969 :
970 : /* which subgroup the peer_af belongs to */
971 : struct update_subgroup *subgroup;
972 :
973 : /* for being part of an update subgroup's peer list */
974 : LIST_ENTRY(peer_af) subgrp_train;
975 :
976 : /* for being part of a packet's peer list */
977 : LIST_ENTRY(peer_af) pkt_train;
978 :
979 : struct bpacket *next_pkt_to_send;
980 :
981 : /*
982 : * Trigger timer for bgp_announce_route().
983 : */
984 : struct thread *t_announce_route;
985 :
986 : afi_t afi;
987 : safi_t safi;
988 : int afid;
989 : };
990 : /* BGP GR per peer ds */
991 :
992 : #define BGP_PEER_GR_MODE 5
993 : #define BGP_PEER_GR_EVENT_CMD 6
994 :
995 : enum peer_mode {
996 : PEER_HELPER = 0,
997 : PEER_GR,
998 : PEER_DISABLE,
999 : PEER_INVALID,
1000 : PEER_GLOBAL_INHERIT /* This is the default mode */
1001 :
1002 : };
1003 :
1004 : enum peer_gr_command {
1005 : PEER_GR_CMD = 0,
1006 : NO_PEER_GR_CMD,
1007 : PEER_DISABLE_CMD,
1008 : NO_PEER_DISABLE_CMD,
1009 : PEER_HELPER_CMD,
1010 : NO_PEER_HELPER_CMD
1011 : };
1012 :
1013 : typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, int, int);
1014 :
1015 : struct bgp_peer_gr {
1016 : enum peer_mode next_state;
1017 : bgp_peer_gr_action_ptr action_fun;
1018 : };
1019 :
1020 : /*
1021 : * BGP FSM event codes, per RFC 4271 ss. 8.1
1022 : */
1023 : enum bgp_fsm_rfc_codes {
1024 : BGP_FSM_ManualStart = 1,
1025 : BGP_FSM_ManualStop = 2,
1026 : BGP_FSM_AutomaticStart = 3,
1027 : BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
1028 : BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
1029 : BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
1030 : BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
1031 : 7,
1032 : BGP_FSM_AutomaticStop = 8,
1033 : BGP_FSM_ConnectRetryTimer_Expires = 9,
1034 : BGP_FSM_HoldTimer_Expires = 10,
1035 : BGP_FSM_KeepaliveTimer_Expires = 11,
1036 : BGP_FSM_DelayOpenTimer_Expires = 12,
1037 : BGP_FSM_IdleHoldTimer_Expires = 13,
1038 : BGP_FSM_TcpConnection_Valid = 14,
1039 : BGP_FSM_Tcp_CR_Invalid = 15,
1040 : BGP_FSM_Tcp_CR_Acked = 16,
1041 : BGP_FSM_TcpConnectionConfirmed = 17,
1042 : BGP_FSM_TcpConnectionFails = 18,
1043 : BGP_FSM_BGPOpen = 19,
1044 : BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
1045 : BGP_FSM_BGPHeaderErr = 21,
1046 : BGP_FSM_BGPOpenMsgErr = 22,
1047 : BGP_FSM_OpenCollisionDump = 23,
1048 : BGP_FSM_NotifMsgVerErr = 24,
1049 : BGP_FSM_NotifMsg = 25,
1050 : BGP_FSM_KeepAliveMsg = 26,
1051 : BGP_FSM_UpdateMsg = 27,
1052 : BGP_FSM_UpdateMsgErr = 28
1053 : };
1054 :
1055 : /*
1056 : * BGP finite state machine events
1057 : *
1058 : * Note: these do not correspond to RFC-defined event codes. Those are
1059 : * defined elsewhere.
1060 : */
1061 : enum bgp_fsm_events {
1062 : BGP_Start = 1,
1063 : BGP_Stop,
1064 : TCP_connection_open,
1065 : TCP_connection_open_w_delay,
1066 : TCP_connection_closed,
1067 : TCP_connection_open_failed,
1068 : TCP_fatal_error,
1069 : ConnectRetry_timer_expired,
1070 : Hold_Timer_expired,
1071 : KeepAlive_timer_expired,
1072 : DelayOpen_timer_expired,
1073 : Receive_OPEN_message,
1074 : Receive_KEEPALIVE_message,
1075 : Receive_UPDATE_message,
1076 : Receive_NOTIFICATION_message,
1077 : Clearing_Completed,
1078 : BGP_EVENTS_MAX,
1079 : };
1080 :
1081 : /* BGP finite state machine status. */
1082 : enum bgp_fsm_status {
1083 : Idle = 1,
1084 : Connect,
1085 : Active,
1086 : OpenSent,
1087 : OpenConfirm,
1088 : Established,
1089 : Clearing,
1090 : Deleted,
1091 : BGP_STATUS_MAX,
1092 : };
1093 :
1094 : #define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
1095 :
1096 : struct llgr_info {
1097 : uint32_t stale_time;
1098 : uint8_t flags;
1099 : };
1100 :
1101 : /* BGP neighbor structure. */
1102 : struct peer {
1103 : /* BGP structure. */
1104 : struct bgp *bgp;
1105 :
1106 : /* reference count, primarily to allow bgp_process'ing of route_node's
1107 : * to be done after a struct peer is deleted.
1108 : *
1109 : * named 'lock' for hysterical reasons within Quagga.
1110 : */
1111 : int lock;
1112 :
1113 : /* BGP peer group. */
1114 : struct peer_group *group;
1115 : uint64_t version[AFI_MAX][SAFI_MAX];
1116 :
1117 : /* BGP peer_af structures, per configured AF on this peer */
1118 : struct peer_af *peer_af_array[BGP_AF_MAX];
1119 :
1120 : /* Peer's remote AS number. */
1121 : int as_type;
1122 : as_t as;
1123 :
1124 : /* Peer's local AS number. */
1125 : as_t local_as;
1126 :
1127 : enum bgp_peer_sort sort;
1128 :
1129 : /* Peer's Change local AS number. */
1130 : as_t change_local_as;
1131 :
1132 : /* Remote router ID. */
1133 : struct in_addr remote_id;
1134 :
1135 : /* Local router ID. */
1136 : struct in_addr local_id;
1137 :
1138 : /* Packet receive and send buffer. */
1139 : pthread_mutex_t io_mtx; // guards ibuf, obuf
1140 : struct stream_fifo *ibuf; // packets waiting to be processed
1141 : struct stream_fifo *obuf; // packets waiting to be written
1142 :
1143 : /* used as a block to deposit raw wire data to */
1144 : uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
1145 : * BGP_READ_PACKET_MAX];
1146 : struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
1147 : struct stream *obuf_work; // WiP buffer used to construct packets
1148 :
1149 : struct stream *curr; // the current packet being parsed
1150 :
1151 : /* We use a separate stream to encode MP_REACH_NLRI for efficient
1152 : * NLRI packing. peer->obuf_work stores all the other attributes. The
1153 : * actual packet is then constructed by concatenating the two.
1154 : */
1155 : struct stream *scratch;
1156 :
1157 : /* the doppelganger peer structure, due to dual TCP conn setup */
1158 : struct peer *doppelganger;
1159 :
1160 : /* Status of the peer. */
1161 : enum bgp_fsm_status status;
1162 : enum bgp_fsm_status ostatus;
1163 :
1164 : /* FSM events, stored for debug purposes.
1165 : * Note: uchar used for reduced memory usage.
1166 : */
1167 : enum bgp_fsm_events cur_event;
1168 : enum bgp_fsm_events last_event;
1169 : enum bgp_fsm_events last_major_event;
1170 :
1171 : /* Peer index, used for dumping TABLE_DUMP_V2 format */
1172 : uint16_t table_dump_index;
1173 :
1174 : /* Peer information */
1175 : int fd; /* File descriptor */
1176 : int ttl; /* TTL of TCP connection to the peer. */
1177 : int rtt; /* Estimated round-trip-time from TCP_INFO */
1178 : int rtt_expected; /* Expected round-trip-time for a peer */
1179 : uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
1180 : uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
1181 : int gtsm_hops; /* minimum hopcount to peer */
1182 : char *desc; /* Description of the peer. */
1183 : unsigned short port; /* Destination port for peer */
1184 : char *host; /* Printable address of the peer. */
1185 : union sockunion su; /* Sockunion address of the peer. */
1186 : #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
1187 : time_t uptime; /* Last Up/Down time */
1188 : time_t readtime; /* Last read time */
1189 : time_t resettime; /* Last reset time */
1190 :
1191 : char *conf_if; /* neighbor interface config name. */
1192 : struct interface *ifp; /* corresponding interface */
1193 : char *ifname; /* bind interface name. */
1194 : char *update_if;
1195 : union sockunion *update_source;
1196 :
1197 : union sockunion *su_local; /* Sockunion of local address. */
1198 : union sockunion *su_remote; /* Sockunion of remote address. */
1199 : int shared_network; /* Is this peer shared same network. */
1200 : struct bgp_nexthop nexthop; /* Nexthop */
1201 :
1202 : /* Roles in bgp session */
1203 : uint8_t local_role;
1204 : uint8_t remote_role;
1205 : #define ROLE_PROVIDER 0
1206 : #define ROLE_RS_SERVER 1
1207 : #define ROLE_RS_CLIENT 2
1208 : #define ROLE_CUSTOMER 3
1209 : #define ROLE_PEER 4
1210 : #define ROLE_UNDEFINED 255
1211 :
1212 : #define ROLE_NAME_MAX_LEN 20
1213 :
1214 : /* Peer address family configuration. */
1215 : uint8_t afc[AFI_MAX][SAFI_MAX];
1216 : uint8_t afc_nego[AFI_MAX][SAFI_MAX];
1217 : uint8_t afc_adv[AFI_MAX][SAFI_MAX];
1218 : uint8_t afc_recv[AFI_MAX][SAFI_MAX];
1219 :
1220 : /* Capability flags (reset in bgp_stop) */
1221 : uint32_t cap;
1222 : #define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
1223 : #define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
1224 : #define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
1225 : #define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
1226 : #define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
1227 : #define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
1228 : #define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
1229 : #define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
1230 : #define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
1231 : /* sent graceful-restart restart (R) bit */
1232 : #define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
1233 : /* received graceful-restart restart (R) bit */
1234 : #define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
1235 : #define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
1236 : #define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
1237 : #define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
1238 : #define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
1239 : #define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
1240 : #define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
1241 : #define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
1242 : #define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
1243 : #define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
1244 : #define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
1245 : #define PEER_CAP_LLGR_ADV (1U << 21)
1246 : #define PEER_CAP_LLGR_RCV (1U << 22)
1247 : /* sent graceful-restart notification (N) bit */
1248 : #define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
1249 : /* received graceful-restart notification (N) bit */
1250 : #define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
1251 : #define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
1252 : #define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
1253 :
1254 : /* Capability flags (reset in bgp_stop) */
1255 : uint32_t af_cap[AFI_MAX][SAFI_MAX];
1256 : #define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
1257 : #define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
1258 : #define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
1259 : #define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
1260 : #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
1261 : #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* receive-mode received */
1262 : #define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
1263 : #define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
1264 : #define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
1265 : #define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
1266 : #define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
1267 : #define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
1268 : #define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
1269 : #define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
1270 : #define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
1271 : #define PEER_CAP_LLGR_AF_ADV (1U << 15)
1272 : #define PEER_CAP_LLGR_AF_RCV (1U << 16)
1273 :
1274 : /* Global configuration flags. */
1275 : /*
1276 : * Parallel array to flags that indicates whether each flag originates
1277 : * from a peer-group or if it is config that is specific to this
1278 : * individual peer. If a flag is set independent of the peer-group, the
1279 : * same bit should be set here. If this peer is a peer-group, this
1280 : * memory region should be all zeros.
1281 : *
1282 : * The assumption is that the default state for all flags is unset,
1283 : * so if a flag is unset, the corresponding override flag is unset too.
1284 : * However if a flag is set, the corresponding override flag is set.
1285 : */
1286 : uint32_t flags_override;
1287 : /*
1288 : * Parallel array to flags that indicates whether the default behavior
1289 : * of *flags_override* should be inverted. If a flag is unset and the
1290 : * corresponding invert flag is set, the corresponding override flag
1291 : * would be set. However if a flag is set and the corresponding invert
1292 : * flag is unset, the corresponding override flag would be unset.
1293 : *
1294 : * This can be used for attributes like *send-community*, which are
1295 : * implicitely enabled and have to be disabled explicitely, compared to
1296 : * 'normal' attributes like *next-hop-self* which are implicitely set.
1297 : *
1298 : * All operations dealing with flags should apply the following boolean
1299 : * logic to keep the internal flag system in a sane state:
1300 : *
1301 : * value=0 invert=0 Inherit flag if member, otherwise unset flag
1302 : * value=0 invert=1 Unset flag unconditionally
1303 : * value=1 invert=0 Set flag unconditionally
1304 : * value=1 invert=1 Inherit flag if member, otherwise set flag
1305 : *
1306 : * Contrary to the implementation of *flags_override*, the flag
1307 : * inversion state can be set either on the peer OR the peer *and* the
1308 : * peer-group. This was done on purpose, as the inversion state of a
1309 : * flag can be determined on either the peer or the peer-group.
1310 : *
1311 : * Example: Enabling the cisco configuration mode inverts all flags
1312 : * related to *send-community* unconditionally for both peer-groups and
1313 : * peers.
1314 : *
1315 : * This behavior is different for interface peers though, which enable
1316 : * the *extended-nexthop* flag by default, which regular peers do not.
1317 : * As the peer-group can contain both regular and interface peers, the
1318 : * flag inversion state must be set on the peer only.
1319 : *
1320 : * When a peer inherits the configuration from a peer-group and the
1321 : * inversion state of the flag differs between peer and peer-group, the
1322 : * newly set value must equal to the inverted state of the peer-group.
1323 : */
1324 : uint32_t flags_invert;
1325 : /*
1326 : * Effective array for storing the peer/peer-group flags. In case of a
1327 : * peer-group, the peer-specific overrides (see flags_override and
1328 : * flags_invert) must be respected.
1329 : */
1330 : uint64_t flags;
1331 : #define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
1332 : #define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
1333 : #define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
1334 : #define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
1335 : #define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
1336 : #define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
1337 : #define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
1338 : #define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
1339 : #define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
1340 : #define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
1341 : #define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
1342 : #define PEER_FLAG_LONESOUL (1ULL << 11)
1343 : #define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
1344 : #define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
1345 : #define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
1346 : #define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
1347 : #define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
1348 : #define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
1349 : #define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
1350 : #define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
1351 : #define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
1352 : #define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
1353 : #define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
1354 :
1355 : /* BGP-GR Peer related flags */
1356 : #define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
1357 : #define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
1358 : #define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
1359 : #define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
1360 : #define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
1361 : #define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
1362 : /* Disable IEEE floating-point link bandwidth encoding in
1363 : * extended communities.
1364 : */
1365 : #define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
1366 : /* force the extended format for Optional Parameters in OPEN message */
1367 : #define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
1368 :
1369 : /* BGP Open Policy flags.
1370 : * Enforce using roles on both sides:
1371 : * `local-role ROLE strict-mode` configured.
1372 : */
1373 : #define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
1374 : /* `local-role` configured */
1375 : #define PEER_FLAG_ROLE (1ULL << 32)
1376 : #define PEER_FLAG_PORT (1ULL << 33)
1377 : #define PEER_FLAG_AIGP (1ULL << 34)
1378 : #define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
1379 :
1380 : /*
1381 : *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
1382 : *& PEER_FLAG_GRACEFUL_RESTART_HELPER
1383 : *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
1384 : */
1385 :
1386 : struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
1387 : enum peer_mode peer_gr_present_state;
1388 : /* Non stop forwarding afi-safi count for BGP gr feature*/
1389 : uint8_t nsf_af_count;
1390 :
1391 : uint8_t peer_gr_new_status_flag;
1392 : #define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
1393 : #define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
1394 : #define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
1395 :
1396 : /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
1397 : char *tx_shutdown_message;
1398 :
1399 : /* NSF mode (graceful restart) */
1400 : uint8_t nsf[AFI_MAX][SAFI_MAX];
1401 : /* EOR Send time */
1402 : time_t eor_stime[AFI_MAX][SAFI_MAX];
1403 : /* Last update packet sent time */
1404 : time_t pkt_stime[AFI_MAX][SAFI_MAX];
1405 :
1406 : /* Peer Per AF flags */
1407 : /*
1408 : * Please consult the comments for *flags_override*, *flags_invert* and
1409 : * *flags* to understand what these three arrays do. The address-family
1410 : * specific attributes are being treated the exact same way as global
1411 : * peer attributes.
1412 : */
1413 : uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
1414 : uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
1415 : uint64_t af_flags[AFI_MAX][SAFI_MAX];
1416 : #define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
1417 : #define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
1418 : #define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
1419 : #define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
1420 : #define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
1421 : #define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
1422 : #define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
1423 : #define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
1424 : #define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
1425 : #define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
1426 : #define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
1427 : #define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
1428 : #define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
1429 : #define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
1430 : #define PEER_FLAG_MAX_PREFIX (1ULL << 14)
1431 : #define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
1432 : #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
1433 : #define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
1434 : #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
1435 : #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
1436 : #define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
1437 : #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
1438 : #define PEER_FLAG_WEIGHT (1ULL << 24)
1439 : #define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 25)
1440 : #define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 26)
1441 : #define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 27)
1442 : #define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 28)
1443 : #define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 29)
1444 : #define PEER_FLAG_SOO (1ULL << 30)
1445 : #define PEER_FLAG_ACCEPT_OWN (1ULL << 31)
1446 :
1447 : enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
1448 :
1449 : /* MD5 password */
1450 : char *password;
1451 :
1452 : /* default-originate route-map. */
1453 : struct {
1454 : char *name;
1455 : struct route_map *map;
1456 : } default_rmap[AFI_MAX][SAFI_MAX];
1457 :
1458 : /* Peer status flags. */
1459 : uint16_t sflags;
1460 : #define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
1461 : #define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
1462 : #define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
1463 : #define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
1464 : #define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
1465 : #define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
1466 : #define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
1467 : /* received extended format encoding for OPEN message */
1468 : #define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
1469 :
1470 : /* Peer status af flags (reset in bgp_stop) */
1471 : uint16_t af_sflags[AFI_MAX][SAFI_MAX];
1472 : #define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
1473 : #define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
1474 : #define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
1475 : #define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
1476 : #define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
1477 : #define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
1478 : #define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
1479 : #define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
1480 : #define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
1481 : #define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
1482 : #define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
1483 : /* LLGR aware peer */
1484 : #define PEER_STATUS_LLGR_WAIT (1U << 11)
1485 : #define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
1486 : #define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
1487 :
1488 : /* Configured timer values. */
1489 : _Atomic uint32_t holdtime;
1490 : _Atomic uint32_t keepalive;
1491 : _Atomic uint32_t connect;
1492 : _Atomic uint32_t routeadv;
1493 : _Atomic uint32_t delayopen;
1494 :
1495 : /* Timer values. */
1496 : _Atomic uint32_t v_start;
1497 : _Atomic uint32_t v_connect;
1498 : _Atomic uint32_t v_holdtime;
1499 : _Atomic uint32_t v_keepalive;
1500 : _Atomic uint32_t v_routeadv;
1501 : _Atomic uint32_t v_delayopen;
1502 : _Atomic uint32_t v_pmax_restart;
1503 : _Atomic uint32_t v_gr_restart;
1504 :
1505 : /* Threads. */
1506 : struct thread *t_read;
1507 : struct thread *t_write;
1508 : struct thread *t_start;
1509 : struct thread *t_connect_check_r;
1510 : struct thread *t_connect_check_w;
1511 : struct thread *t_connect;
1512 : struct thread *t_holdtime;
1513 : struct thread *t_routeadv;
1514 : struct thread *t_delayopen;
1515 : struct thread *t_pmax_restart;
1516 : struct thread *t_gr_restart;
1517 : struct thread *t_gr_stale;
1518 : struct thread *t_llgr_stale[AFI_MAX][SAFI_MAX];
1519 : struct thread *t_revalidate_all[AFI_MAX][SAFI_MAX];
1520 : struct thread *t_generate_updgrp_packets;
1521 : struct thread *t_process_packet;
1522 : struct thread *t_process_packet_error;
1523 : struct thread *t_refresh_stalepath;
1524 :
1525 : /* Thread flags. */
1526 : _Atomic uint32_t thread_flags;
1527 : #define PEER_THREAD_WRITES_ON (1U << 0)
1528 : #define PEER_THREAD_READS_ON (1U << 1)
1529 : #define PEER_THREAD_KEEPALIVES_ON (1U << 2)
1530 : #define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
1531 :
1532 : /* workqueues */
1533 : struct work_queue *clear_node_queue;
1534 :
1535 : #define PEER_TOTAL_RX(peer) \
1536 : atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
1537 : + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
1538 : + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
1539 : + atomic_load_explicit(&peer->refresh_in, \
1540 : memory_order_relaxed) \
1541 : + atomic_load_explicit(&peer->keepalive_in, \
1542 : memory_order_relaxed) \
1543 : + atomic_load_explicit(&peer->dynamic_cap_in, \
1544 : memory_order_relaxed)
1545 :
1546 : #define PEER_TOTAL_TX(peer) \
1547 : atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
1548 : + atomic_load_explicit(&peer->update_out, \
1549 : memory_order_relaxed) \
1550 : + atomic_load_explicit(&peer->notify_out, \
1551 : memory_order_relaxed) \
1552 : + atomic_load_explicit(&peer->refresh_out, \
1553 : memory_order_relaxed) \
1554 : + atomic_load_explicit(&peer->keepalive_out, \
1555 : memory_order_relaxed) \
1556 : + atomic_load_explicit(&peer->dynamic_cap_out, \
1557 : memory_order_relaxed)
1558 :
1559 : /* Statistics field */
1560 : _Atomic uint32_t open_in; /* Open message input count */
1561 : _Atomic uint32_t open_out; /* Open message output count */
1562 : _Atomic uint32_t update_in; /* Update message input count */
1563 : _Atomic uint32_t update_out; /* Update message ouput count */
1564 : _Atomic time_t update_time; /* Update message received time. */
1565 : _Atomic uint32_t keepalive_in; /* Keepalive input count */
1566 : _Atomic uint32_t keepalive_out; /* Keepalive output count */
1567 : _Atomic uint32_t notify_in; /* Notify input count */
1568 : _Atomic uint32_t notify_out; /* Notify output count */
1569 : _Atomic uint32_t refresh_in; /* Route Refresh input count */
1570 : _Atomic uint32_t refresh_out; /* Route Refresh output count */
1571 : _Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
1572 : _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
1573 :
1574 : uint32_t stat_pfx_filter;
1575 : uint32_t stat_pfx_aspath_loop;
1576 : uint32_t stat_pfx_originator_loop;
1577 : uint32_t stat_pfx_cluster_loop;
1578 : uint32_t stat_pfx_nh_invalid;
1579 : uint32_t stat_pfx_dup_withdraw;
1580 : uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
1581 :
1582 : /* BGP state count */
1583 : uint32_t established; /* Established */
1584 : uint32_t dropped; /* Dropped */
1585 :
1586 : /* Update delay related fields */
1587 : uint8_t update_delay_over; /* When this is set, BGP is no more waiting
1588 : for EOR */
1589 :
1590 : /* Syncronization list and time. */
1591 : struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
1592 : time_t synctime;
1593 : /* timestamp when the last UPDATE msg was written */
1594 : _Atomic time_t last_write;
1595 : /* timestamp when the last msg was written */
1596 : _Atomic time_t last_update;
1597 :
1598 : /* only updated under io_mtx.
1599 : * last_sendq_warn is only for ratelimiting log warning messages.
1600 : */
1601 : time_t last_sendq_ok, last_sendq_warn;
1602 :
1603 : /* Notify data. */
1604 : struct bgp_notify notify;
1605 :
1606 : /* Filter structure. */
1607 : struct bgp_filter filter[AFI_MAX][SAFI_MAX];
1608 :
1609 : /*
1610 : * Parallel array to filter that indicates whether each filter
1611 : * originates from a peer-group or if it is config that is specific to
1612 : * this individual peer. If a filter is set independent of the
1613 : * peer-group the appropriate bit should be set here. If this peer is a
1614 : * peer-group, this memory region should be all zeros. The assumption
1615 : * is that the default state for all flags is unset. Due to filters
1616 : * having a direction (e.g. in/out/...), this array has a third
1617 : * dimension for storing the overrides independently per direction.
1618 : *
1619 : * Notes:
1620 : * - if a filter for an individual peer is unset, the corresponding
1621 : * override flag is unset and the peer is considered to be back in
1622 : * sync with the peer-group.
1623 : * - This does *not* contain the filter values, rather it contains
1624 : * whether the filter in filter (struct bgp_filter) is peer-specific.
1625 : */
1626 : uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
1627 : #define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
1628 : #define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
1629 : #define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
1630 : #define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
1631 : #define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
1632 : #define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
1633 :
1634 : /* ORF Prefix-list */
1635 : struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
1636 :
1637 : /* Text description of last attribute rcvd */
1638 : char rcvd_attr_str[BUFSIZ];
1639 :
1640 : /* Track if we printed the attribute in debugs */
1641 : int rcvd_attr_printed;
1642 :
1643 : /* Accepted prefix count */
1644 : uint32_t pcount[AFI_MAX][SAFI_MAX];
1645 :
1646 : /* Max prefix count. */
1647 : uint32_t pmax[AFI_MAX][SAFI_MAX];
1648 : uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
1649 : uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
1650 : #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
1651 :
1652 : /* Send prefix count. */
1653 : uint32_t pmax_out[AFI_MAX][SAFI_MAX];
1654 :
1655 : /* allowas-in. */
1656 : char allowas_in[AFI_MAX][SAFI_MAX];
1657 :
1658 : /* soo */
1659 : struct ecommunity *soo[AFI_MAX][SAFI_MAX];
1660 :
1661 : /* weight */
1662 : unsigned long weight[AFI_MAX][SAFI_MAX];
1663 :
1664 : /* peer reset cause */
1665 : uint8_t last_reset;
1666 : #define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
1667 : #define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
1668 : #define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
1669 : #define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
1670 : #define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
1671 : #define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
1672 : #define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
1673 : #define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
1674 : #define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
1675 : #define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
1676 : #define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
1677 : #define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
1678 : #define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
1679 : #define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
1680 : #define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
1681 : #define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
1682 : #define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
1683 : #define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
1684 : #define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
1685 : #define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
1686 : #define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
1687 : #define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
1688 : #define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
1689 : #define PEER_DOWN_BFD_DOWN 24U /* BFD down */
1690 : #define PEER_DOWN_IF_DOWN 25U /* Interface down */
1691 : #define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
1692 : #define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
1693 : #define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
1694 : #define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
1695 : #define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
1696 : #define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
1697 : #define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
1698 : #define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
1699 : #define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
1700 : #define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
1701 : /*
1702 : * Remember to update peer_down_str in bgp_fsm.c when you add
1703 : * a new value to the last_reset reason
1704 : */
1705 :
1706 : uint16_t last_reset_cause_size;
1707 : uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1708 :
1709 : /* The kind of route-map Flags.*/
1710 : uint16_t rmap_type;
1711 : #define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
1712 : #define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
1713 : #define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
1714 : #define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
1715 : #define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
1716 : #define PEER_RMAP_TYPE_NOSET (1U << 5) /* not allow to set commands */
1717 : #define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
1718 : #define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
1719 : #define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* aggregate-address route-map */
1720 :
1721 : /** Peer overwrite configuration. */
1722 : struct bfd_session_config {
1723 : /**
1724 : * Manual configuration bit.
1725 : *
1726 : * This flag only makes sense for real peers (and not groups),
1727 : * it keeps track if the user explicitly configured BFD for a
1728 : * peer.
1729 : */
1730 : bool manual;
1731 : /** Control Plane Independent. */
1732 : bool cbit;
1733 : /** Detection multiplier. */
1734 : uint8_t detection_multiplier;
1735 : /** Minimum required RX interval. */
1736 : uint32_t min_rx;
1737 : /** Minimum required TX interval. */
1738 : uint32_t min_tx;
1739 : /** Profile name. */
1740 : char profile[BFD_PROFILE_NAME_LEN];
1741 : /** Peer BFD session */
1742 : struct bfd_session_params *session;
1743 : } * bfd_config;
1744 :
1745 : /* hostname and domainname advertised by host */
1746 : char *hostname;
1747 : char *domainname;
1748 :
1749 : /* Sender side AS path loop detection. */
1750 : bool as_path_loop_detection;
1751 :
1752 : /* Extended Message Support */
1753 : uint16_t max_packet_size;
1754 :
1755 : /* Conditional advertisement */
1756 : bool advmap_config_change[AFI_MAX][SAFI_MAX];
1757 : bool advmap_table_change;
1758 :
1759 : /* set TCP max segment size */
1760 : uint32_t tcp_mss;
1761 :
1762 : /* Long-lived Graceful Restart */
1763 : struct llgr_info llgr[AFI_MAX][SAFI_MAX];
1764 :
1765 : bool shut_during_cfg;
1766 :
1767 : #define BGP_ATTR_MAX 255
1768 : /* Path attributes discard */
1769 : bool discard_attrs[BGP_ATTR_MAX];
1770 :
1771 : QOBJ_FIELDS;
1772 : };
1773 : DECLARE_QOBJ_TYPE(peer);
1774 :
1775 : /* Inherit peer attribute from peer-group. */
1776 : #define PEER_ATTR_INHERIT(peer, group, attr) \
1777 : ((peer)->attr = (group)->conf->attr)
1778 : #define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
1779 : do { \
1780 : XFREE(mt, (peer)->attr); \
1781 : if ((group)->conf->attr) \
1782 : (peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
1783 : else \
1784 : (peer)->attr = NULL; \
1785 : } while (0)
1786 : #define PEER_SU_ATTR_INHERIT(peer, group, attr) \
1787 : do { \
1788 : if ((peer)->attr) \
1789 : sockunion_free((peer)->attr); \
1790 : if ((group)->conf->attr) \
1791 : (peer)->attr = sockunion_dup((group)->conf->attr); \
1792 : else \
1793 : (peer)->attr = NULL; \
1794 : } while (0)
1795 :
1796 : /* Check if suppress start/restart of sessions to peer. */
1797 : #define BGP_PEER_START_SUPPRESSED(P) \
1798 : (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
1799 : CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
1800 : CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
1801 : (P)->shut_during_cfg)
1802 :
1803 : #define PEER_ROUTE_ADV_DELAY(peer) \
1804 : (CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
1805 :
1806 : #define PEER_PASSWORD_MINLEN (1)
1807 : #define PEER_PASSWORD_MAXLEN (80)
1808 :
1809 : /* This structure's member directly points incoming packet data
1810 : stream. */
1811 : struct bgp_nlri {
1812 : /* AFI. */
1813 : uint16_t afi; /* iana_afi_t */
1814 :
1815 : /* SAFI. */
1816 : uint8_t safi; /* iana_safi_t */
1817 :
1818 : /* Pointer to NLRI byte stream. */
1819 : uint8_t *nlri;
1820 :
1821 : /* Length of whole NLRI. */
1822 : bgp_size_t length;
1823 : };
1824 :
1825 : /* BGP versions. */
1826 : #define BGP_VERSION_4 4
1827 :
1828 : /* Default BGP port number. */
1829 : #define BGP_PORT_DEFAULT 179
1830 :
1831 : /* Extended BGP Administrative Shutdown Communication */
1832 : #define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
1833 :
1834 : /* BGP minimum message size. */
1835 : #define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
1836 : #define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
1837 : #define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
1838 : #define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
1839 : #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
1840 : #define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
1841 :
1842 : /* BGP message types. */
1843 : #define BGP_MSG_OPEN 1
1844 : #define BGP_MSG_UPDATE 2
1845 : #define BGP_MSG_NOTIFY 3
1846 : #define BGP_MSG_KEEPALIVE 4
1847 : #define BGP_MSG_ROUTE_REFRESH_NEW 5
1848 : #define BGP_MSG_CAPABILITY 6
1849 : #define BGP_MSG_ROUTE_REFRESH_OLD 128
1850 :
1851 : /* BGP open optional parameter. */
1852 : #define BGP_OPEN_OPT_CAP 2
1853 :
1854 : /* BGP4 attribute type codes. */
1855 : #define BGP_ATTR_ORIGIN 1
1856 : #define BGP_ATTR_AS_PATH 2
1857 : #define BGP_ATTR_NEXT_HOP 3
1858 : #define BGP_ATTR_MULTI_EXIT_DISC 4
1859 : #define BGP_ATTR_LOCAL_PREF 5
1860 : #define BGP_ATTR_ATOMIC_AGGREGATE 6
1861 : #define BGP_ATTR_AGGREGATOR 7
1862 : #define BGP_ATTR_COMMUNITIES 8
1863 : #define BGP_ATTR_ORIGINATOR_ID 9
1864 : #define BGP_ATTR_CLUSTER_LIST 10
1865 : #define BGP_ATTR_MP_REACH_NLRI 14
1866 : #define BGP_ATTR_MP_UNREACH_NLRI 15
1867 : #define BGP_ATTR_EXT_COMMUNITIES 16
1868 : #define BGP_ATTR_AS4_PATH 17
1869 : #define BGP_ATTR_AS4_AGGREGATOR 18
1870 : #define BGP_ATTR_PMSI_TUNNEL 22
1871 : #define BGP_ATTR_ENCAP 23
1872 : #define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
1873 : #define BGP_ATTR_AIGP 26
1874 : #define BGP_ATTR_LARGE_COMMUNITIES 32
1875 : #define BGP_ATTR_OTC 35
1876 : #define BGP_ATTR_PREFIX_SID 40
1877 : #define BGP_ATTR_SRTE_COLOR 51
1878 : #ifdef ENABLE_BGP_VNC_ATTR
1879 : #define BGP_ATTR_VNC 255
1880 : #endif
1881 :
1882 : /* BGP update origin. */
1883 : #define BGP_ORIGIN_IGP 0
1884 : #define BGP_ORIGIN_EGP 1
1885 : #define BGP_ORIGIN_INCOMPLETE 2
1886 : #define BGP_ORIGIN_UNSPECIFIED 255
1887 :
1888 : /* BGP notify message codes. */
1889 : #define BGP_NOTIFY_HEADER_ERR 1
1890 : #define BGP_NOTIFY_OPEN_ERR 2
1891 : #define BGP_NOTIFY_UPDATE_ERR 3
1892 : #define BGP_NOTIFY_HOLD_ERR 4
1893 : #define BGP_NOTIFY_FSM_ERR 5
1894 : #define BGP_NOTIFY_CEASE 6
1895 : #define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
1896 :
1897 : /* Subcodes for BGP Finite State Machine Error */
1898 : #define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
1899 : #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
1900 : #define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
1901 : #define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
1902 :
1903 : #define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
1904 :
1905 : /* BGP_NOTIFY_HEADER_ERR sub codes. */
1906 : #define BGP_NOTIFY_HEADER_NOT_SYNC 1
1907 : #define BGP_NOTIFY_HEADER_BAD_MESLEN 2
1908 : #define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
1909 :
1910 : /* BGP_NOTIFY_OPEN_ERR sub codes. */
1911 : #define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
1912 : #define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
1913 : #define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
1914 : #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
1915 : #define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
1916 : #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
1917 : #define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
1918 : #define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
1919 :
1920 : /* BGP_NOTIFY_UPDATE_ERR sub codes. */
1921 : #define BGP_NOTIFY_UPDATE_MAL_ATTR 1
1922 : #define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
1923 : #define BGP_NOTIFY_UPDATE_MISS_ATTR 3
1924 : #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
1925 : #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
1926 : #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
1927 : #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
1928 : #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
1929 : #define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
1930 : #define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
1931 :
1932 : /* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
1933 : #define BGP_NOTIFY_CEASE_MAX_PREFIX 1
1934 : #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
1935 : #define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
1936 : #define BGP_NOTIFY_CEASE_ADMIN_RESET 4
1937 : #define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
1938 : #define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
1939 : #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
1940 : #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
1941 : #define BGP_NOTIFY_CEASE_HARD_RESET 9
1942 : #define BGP_NOTIFY_CEASE_BFD_DOWN 10
1943 :
1944 : /* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
1945 : #define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
1946 :
1947 : /* BGP route refresh optional subtypes. */
1948 : #define BGP_ROUTE_REFRESH_NORMAL 0
1949 : #define BGP_ROUTE_REFRESH_BORR 1
1950 : #define BGP_ROUTE_REFRESH_EORR 2
1951 :
1952 : /* BGP timers default value. */
1953 : #define BGP_INIT_START_TIMER 1
1954 : /* The following 3 are RFC defaults that are overridden in bgp_vty.c with
1955 : * version-/profile-specific values. The values here do not matter, they only
1956 : * exist to provide a clear layering separation between core and CLI.
1957 : */
1958 : #define BGP_DEFAULT_HOLDTIME 180
1959 : #define BGP_DEFAULT_KEEPALIVE 60
1960 : #define BGP_DEFAULT_CONNECT_RETRY 120
1961 :
1962 : #define BGP_DEFAULT_EBGP_ROUTEADV 0
1963 : #define BGP_DEFAULT_IBGP_ROUTEADV 0
1964 :
1965 : /* BGP RFC 4271 DelayOpenTime default value */
1966 : #define BGP_DEFAULT_DELAYOPEN 120
1967 :
1968 : /* BGP default local preference. */
1969 : #define BGP_DEFAULT_LOCAL_PREF 100
1970 :
1971 : /* BGP local-preference to send when 'bgp graceful-shutdown'
1972 : * is configured */
1973 : #define BGP_GSHUT_LOCAL_PREF 0
1974 :
1975 : /* BGP default subgroup packet queue max . */
1976 : #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
1977 :
1978 : /* BGP graceful restart */
1979 : #define BGP_DEFAULT_RESTART_TIME 120
1980 : #define BGP_DEFAULT_STALEPATH_TIME 360
1981 : #define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
1982 : #define BGP_DEFAULT_RIB_STALE_TIME 500
1983 : #define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
1984 :
1985 : /* BGP Long-lived Graceful Restart */
1986 : #define BGP_DEFAULT_LLGR_STALE_TIME 0
1987 :
1988 : /* BGP uptime string length. */
1989 : #define BGP_UPTIME_LEN 25
1990 :
1991 : /* Default configuration settings for bgpd. */
1992 : #define BGP_VTY_PORT 2605
1993 : #define BGP_DEFAULT_CONFIG "bgpd.conf"
1994 :
1995 : /* BGP Dynamic Neighbors feature */
1996 : #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
1997 : #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
1998 : #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
1999 :
2000 : /* BGP AIGP */
2001 : #define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
2002 : #define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
2003 : #define BGP_AIGP_TLV_METRIC_LEN 11
2004 : #define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
2005 : #define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
2006 :
2007 : /* Flag for peer_clear_soft(). */
2008 : enum bgp_clear_type {
2009 : BGP_CLEAR_SOFT_NONE,
2010 : BGP_CLEAR_SOFT_OUT,
2011 : BGP_CLEAR_SOFT_IN,
2012 : BGP_CLEAR_SOFT_BOTH,
2013 : BGP_CLEAR_SOFT_IN_ORF_PREFIX,
2014 : BGP_CLEAR_MESSAGE_STATS
2015 : };
2016 :
2017 : /* Macros. */
2018 : #define BGP_INPUT(P) ((P)->curr)
2019 : #define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
2020 : #define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
2021 : (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
2022 :
2023 : /* BGP error codes. */
2024 : enum bgp_create_error_code {
2025 : BGP_SUCCESS = 0,
2026 : BGP_CREATED = 1,
2027 : BGP_ERR_INVALID_VALUE = -1,
2028 : BGP_ERR_INVALID_FLAG = -2,
2029 : BGP_ERR_INVALID_AS = -3,
2030 : BGP_ERR_PEER_GROUP_MEMBER = -4,
2031 : BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
2032 : BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
2033 : BGP_ERR_PEER_GROUP_MISMATCH = -7,
2034 : BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
2035 : BGP_ERR_AS_MISMATCH = -9,
2036 : BGP_ERR_PEER_FLAG_CONFLICT = -10,
2037 : BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
2038 : BGP_ERR_PEER_FILTER_CONFLICT = -12,
2039 : BGP_ERR_NOT_INTERNAL_PEER = -13,
2040 : BGP_ERR_REMOVE_PRIVATE_AS = -14,
2041 : BGP_ERR_AF_UNCONFIGURED = -15,
2042 : BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
2043 : BGP_ERR_INSTANCE_MISMATCH = -17,
2044 : BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
2045 : BGP_ERR_TCPSIG_FAILED = -20,
2046 : BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
2047 : BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
2048 : BGP_ERR_NO_INTERFACE_CONFIG = -23,
2049 : BGP_ERR_AS_OVERRIDE = -25,
2050 : BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
2051 : BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
2052 : BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
2053 : BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
2054 : BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
2055 : BGP_ERR_PEER_SAFI_CONFLICT = -31,
2056 :
2057 : /* BGP GR ERRORS */
2058 : BGP_ERR_GR_INVALID_CMD = -32,
2059 : BGP_ERR_GR_OPERATION_FAILED = -33,
2060 : BGP_GR_NO_OPERATION = -34,
2061 :
2062 : /*BGP Open Policy ERRORS */
2063 : BGP_ERR_INVALID_ROLE_NAME = -35,
2064 : BGP_ERR_INVALID_INTERNAL_ROLE = -36
2065 : };
2066 :
2067 : /*
2068 : * Enumeration of different policy kinds a peer can be configured with.
2069 : */
2070 : enum bgp_policy_type {
2071 : BGP_POLICY_ROUTE_MAP,
2072 : BGP_POLICY_FILTER_LIST,
2073 : BGP_POLICY_PREFIX_LIST,
2074 : BGP_POLICY_DISTRIBUTE_LIST,
2075 : };
2076 :
2077 : /* peer_flag_change_type. */
2078 : enum peer_change_type {
2079 : peer_change_none,
2080 : peer_change_reset,
2081 : peer_change_reset_in,
2082 : peer_change_reset_out,
2083 : };
2084 :
2085 : extern struct bgp_master *bm;
2086 : extern unsigned int multipath_num;
2087 :
2088 : /* Prototypes. */
2089 : extern void bgp_terminate(void);
2090 : extern void bgp_reset(void);
2091 : extern void bgp_zclient_reset(void);
2092 : extern struct bgp *bgp_get_default(void);
2093 : extern struct bgp *bgp_lookup(as_t, const char *);
2094 : extern struct bgp *bgp_lookup_by_name(const char *);
2095 : extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
2096 : extern struct bgp *bgp_get_evpn(void);
2097 : extern void bgp_set_evpn(struct bgp *bgp);
2098 : extern struct peer *peer_lookup(struct bgp *, union sockunion *);
2099 : extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
2100 : extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
2101 : extern void bgp_peer_conf_if_to_su_update(struct peer *);
2102 : extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
2103 : extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
2104 : extern struct peer_group *peer_group_get(struct bgp *, const char *);
2105 : extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
2106 : union sockunion *,
2107 : struct peer_group *);
2108 : extern struct prefix *
2109 : peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
2110 : extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
2111 : struct prefix *,
2112 : struct prefix **);
2113 : extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
2114 : union sockunion *);
2115 :
2116 : /*
2117 : * Peers are incredibly easy to memory leak
2118 : * due to the various ways that they are actually used
2119 : * Provide some functionality to debug locks and unlocks
2120 : */
2121 : extern struct peer *peer_lock_with_caller(const char *, struct peer *);
2122 : extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
2123 : #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
2124 : #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
2125 :
2126 : extern enum bgp_peer_sort peer_sort(struct peer *peer);
2127 : extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
2128 :
2129 : extern bool peer_active(struct peer *);
2130 : extern bool peer_active_nego(struct peer *);
2131 : extern bool peer_afc_received(struct peer *peer);
2132 : extern bool peer_afc_advertised(struct peer *peer);
2133 : extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
2134 : extern struct peer *peer_create(union sockunion *su, const char *conf_if,
2135 : struct bgp *bgp, as_t local_as, as_t remote_as,
2136 : int as_type, struct peer_group *group,
2137 : bool config_node);
2138 : extern struct peer *peer_create_accept(struct bgp *);
2139 : extern void peer_xfer_config(struct peer *dst, struct peer *src);
2140 : extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
2141 : json_object *json);
2142 :
2143 : extern int bgp_config_write(struct vty *);
2144 :
2145 : extern void bgp_master_init(struct thread_master *master, const int buffer_size,
2146 : struct list *addresses);
2147 :
2148 : extern void bgp_init(unsigned short instance);
2149 : extern void bgp_pthreads_run(void);
2150 : extern void bgp_pthreads_finish(void);
2151 : extern void bgp_route_map_init(void);
2152 : extern void bgp_session_reset(struct peer *);
2153 :
2154 : extern int bgp_option_set(int);
2155 : extern int bgp_option_unset(int);
2156 : extern int bgp_option_check(int);
2157 :
2158 : /* set the bgp no-rib option during runtime and remove installed routes */
2159 : extern void bgp_option_norib_set_runtime(void);
2160 :
2161 : /* unset the bgp no-rib option during runtime and reset all peers */
2162 : extern void bgp_option_norib_unset_runtime(void);
2163 :
2164 : extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
2165 : extern void bgp_instance_up(struct bgp *);
2166 : extern void bgp_instance_down(struct bgp *);
2167 : extern int bgp_delete(struct bgp *);
2168 :
2169 : extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
2170 : vrf_id_t old_vrf_id, bool create);
2171 :
2172 : extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
2173 : extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
2174 :
2175 : extern void bm_wait_for_fib_set(bool set);
2176 : extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
2177 : extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
2178 : extern void bgp_cluster_id_unset(struct bgp *bgp);
2179 :
2180 : extern void bgp_confederation_id_set(struct bgp *bgp, as_t as);
2181 : extern void bgp_confederation_id_unset(struct bgp *bgp);
2182 : extern bool bgp_confederation_peers_check(struct bgp *, as_t);
2183 :
2184 : extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as);
2185 : extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
2186 :
2187 : extern void bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime,
2188 : uint32_t connect_retry, uint32_t delayopen);
2189 : extern void bgp_timers_unset(struct bgp *);
2190 :
2191 : extern void bgp_default_local_preference_set(struct bgp *bgp,
2192 : uint32_t local_pref);
2193 : extern void bgp_default_local_preference_unset(struct bgp *bgp);
2194 :
2195 : extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
2196 : uint32_t queue_size);
2197 : extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
2198 :
2199 : extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
2200 : extern void bgp_listen_limit_unset(struct bgp *bgp);
2201 :
2202 : extern bool bgp_update_delay_active(struct bgp *);
2203 : extern bool bgp_update_delay_configured(struct bgp *);
2204 : extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
2205 : extern void peer_as_change(struct peer *, as_t, int);
2206 : extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
2207 : int);
2208 : extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
2209 : extern int peer_delete(struct peer *peer);
2210 : extern void peer_notify_unconfig(struct peer *peer);
2211 : extern int peer_group_delete(struct peer_group *);
2212 : extern int peer_group_remote_as_delete(struct peer_group *);
2213 : extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
2214 : extern void peer_group_notify_unconfig(struct peer_group *group);
2215 :
2216 : extern int peer_activate(struct peer *, afi_t, safi_t);
2217 : extern int peer_deactivate(struct peer *, afi_t, safi_t);
2218 :
2219 : extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
2220 : struct peer_group *, as_t *);
2221 :
2222 : extern int peer_flag_set(struct peer *peer, uint64_t flag);
2223 : extern int peer_flag_unset(struct peer *peer, uint64_t flag);
2224 : extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
2225 :
2226 : extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
2227 : uint64_t flag);
2228 : extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
2229 : uint64_t flag);
2230 : extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
2231 : extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
2232 : uint64_t flag);
2233 : extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
2234 : enum peer_change_type type);
2235 :
2236 : extern int peer_ebgp_multihop_set(struct peer *, int);
2237 : extern int peer_ebgp_multihop_unset(struct peer *);
2238 : extern int is_ebgp_multihop_configured(struct peer *peer);
2239 :
2240 : extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
2241 : extern int peer_role_unset(struct peer *peer);
2242 :
2243 : extern void peer_description_set(struct peer *, const char *);
2244 : extern void peer_description_unset(struct peer *);
2245 :
2246 : extern int peer_update_source_if_set(struct peer *, const char *);
2247 : extern void peer_update_source_addr_set(struct peer *peer,
2248 : const union sockunion *su);
2249 : extern void peer_update_source_unset(struct peer *peer);
2250 :
2251 : extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
2252 : const char *rmap,
2253 : struct route_map *route_map);
2254 : extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
2255 : extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
2256 : uint16_t interval, uint16_t probes);
2257 : extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
2258 :
2259 : extern void peer_port_set(struct peer *, uint16_t);
2260 : extern void peer_port_unset(struct peer *);
2261 :
2262 : extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
2263 : extern int peer_weight_unset(struct peer *, afi_t, safi_t);
2264 :
2265 : extern int peer_timers_set(struct peer *, uint32_t keepalive,
2266 : uint32_t holdtime);
2267 : extern int peer_timers_unset(struct peer *);
2268 :
2269 : extern int peer_timers_connect_set(struct peer *, uint32_t);
2270 : extern int peer_timers_connect_unset(struct peer *);
2271 :
2272 : extern int peer_advertise_interval_set(struct peer *, uint32_t);
2273 : extern int peer_advertise_interval_unset(struct peer *);
2274 :
2275 : extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
2276 : extern int peer_timers_delayopen_unset(struct peer *peer);
2277 :
2278 : extern void peer_interface_set(struct peer *, const char *);
2279 : extern void peer_interface_unset(struct peer *);
2280 :
2281 : extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
2282 : extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
2283 :
2284 : extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
2285 : extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
2286 :
2287 : extern int peer_local_as_set(struct peer *, as_t, bool no_prepend,
2288 : bool replace_as);
2289 : extern int peer_local_as_unset(struct peer *);
2290 :
2291 : extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
2292 : const char *);
2293 : extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
2294 :
2295 : extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
2296 : extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
2297 :
2298 : extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
2299 : const char *name, struct route_map *route_map);
2300 : extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
2301 :
2302 : extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
2303 : const char *name,
2304 : struct route_map *route_map);
2305 :
2306 : extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
2307 : const char *advertise_name,
2308 : struct route_map *advertise_map,
2309 : const char *condition_name,
2310 : struct route_map *condition_map,
2311 : bool condition);
2312 :
2313 : extern int peer_password_set(struct peer *, const char *);
2314 : extern int peer_password_unset(struct peer *);
2315 :
2316 : extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
2317 :
2318 : extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
2319 : const char *advertise_name,
2320 : struct route_map *advertise_map,
2321 : const char *condition_name,
2322 : struct route_map *condition_map,
2323 : bool condition);
2324 :
2325 : extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
2326 : uint8_t, int, uint16_t, bool force);
2327 : extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
2328 :
2329 : extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
2330 : safi_t safi);
2331 : extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
2332 : safi_t safi, uint32_t max);
2333 : extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
2334 : safi_t safi);
2335 :
2336 : extern int peer_clear(struct peer *, struct listnode **);
2337 : extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
2338 :
2339 : extern int peer_ttl_security_hops_set(struct peer *, int);
2340 : extern int peer_ttl_security_hops_unset(struct peer *);
2341 :
2342 : extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
2343 : extern void peer_tx_shutdown_message_unset(struct peer *);
2344 :
2345 : extern void bgp_route_map_update_timer(struct thread *thread);
2346 : extern const char *bgp_get_name_by_role(uint8_t role);
2347 :
2348 : extern void bgp_route_map_terminate(void);
2349 :
2350 : extern int peer_cmp(struct peer *p1, struct peer *p2);
2351 :
2352 : extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
2353 : afi_t *afi, safi_t *safi);
2354 : extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
2355 : iana_afi_t *pkt_afi,
2356 : iana_safi_t *pkt_safi);
2357 :
2358 : extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
2359 : extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
2360 : extern int peer_af_delete(struct peer *, afi_t, safi_t);
2361 :
2362 : extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
2363 : extern void bgp_shutdown_disable(struct bgp *bgp);
2364 :
2365 : extern void bgp_close(void);
2366 : extern void bgp_free(struct bgp *);
2367 : void bgp_gr_apply_running_config(void);
2368 :
2369 : /* BGP GR */
2370 : int bgp_global_gr_init(struct bgp *bgp);
2371 : int bgp_peer_gr_init(struct peer *peer);
2372 :
2373 :
2374 : #define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
2375 : do { \
2376 : struct peer *peer_loop; \
2377 : bool gr_router_detected = false; \
2378 : struct listnode *node = {0}; \
2379 : for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
2380 : if (CHECK_FLAG(peer_loop->flags, \
2381 : PEER_FLAG_GRACEFUL_RESTART)) \
2382 : gr_router_detected = true; \
2383 : } \
2384 : if (gr_router_detected \
2385 : && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
2386 : bgp_zebra_send_capabilities(_bgp, false); \
2387 : } else if (!gr_router_detected \
2388 : && _bgp->present_zebra_gr_state \
2389 : == ZEBRA_GR_ENABLE) { \
2390 : bgp_zebra_send_capabilities(_bgp, true); \
2391 : } \
2392 : } while (0)
2393 :
2394 384 : static inline struct bgp *bgp_lock(struct bgp *bgp)
2395 : {
2396 384 : bgp->lock++;
2397 214 : return bgp;
2398 : }
2399 :
2400 354 : static inline void bgp_unlock(struct bgp *bgp)
2401 : {
2402 354 : assert(bgp->lock > 0);
2403 354 : if (--bgp->lock == 0)
2404 18 : bgp_free(bgp);
2405 354 : }
2406 :
2407 6056 : static inline int afindex(afi_t afi, safi_t safi)
2408 : {
2409 6056 : switch (afi) {
2410 2507 : case AFI_IP:
2411 2507 : switch (safi) {
2412 : case SAFI_UNICAST:
2413 : return BGP_AF_IPV4_UNICAST;
2414 251 : case SAFI_MULTICAST:
2415 251 : return BGP_AF_IPV4_MULTICAST;
2416 366 : case SAFI_LABELED_UNICAST:
2417 366 : return BGP_AF_IPV4_LBL_UNICAST;
2418 251 : case SAFI_MPLS_VPN:
2419 251 : return BGP_AF_IPV4_VPN;
2420 251 : case SAFI_ENCAP:
2421 251 : return BGP_AF_IPV4_ENCAP;
2422 251 : case SAFI_FLOWSPEC:
2423 251 : return BGP_AF_IPV4_FLOWSPEC;
2424 : case SAFI_EVPN:
2425 : case SAFI_UNSPEC:
2426 : case SAFI_MAX:
2427 : return BGP_AF_MAX;
2428 : }
2429 : break;
2430 1792 : case AFI_IP6:
2431 1792 : switch (safi) {
2432 : case SAFI_UNICAST:
2433 : return BGP_AF_IPV6_UNICAST;
2434 251 : case SAFI_MULTICAST:
2435 251 : return BGP_AF_IPV6_MULTICAST;
2436 263 : case SAFI_LABELED_UNICAST:
2437 263 : return BGP_AF_IPV6_LBL_UNICAST;
2438 251 : case SAFI_MPLS_VPN:
2439 251 : return BGP_AF_IPV6_VPN;
2440 251 : case SAFI_ENCAP:
2441 251 : return BGP_AF_IPV6_ENCAP;
2442 251 : case SAFI_FLOWSPEC:
2443 251 : return BGP_AF_IPV6_FLOWSPEC;
2444 : case SAFI_EVPN:
2445 : case SAFI_UNSPEC:
2446 : case SAFI_MAX:
2447 : return BGP_AF_MAX;
2448 : }
2449 : break;
2450 1757 : case AFI_L2VPN:
2451 1757 : switch (safi) {
2452 : case SAFI_EVPN:
2453 : return BGP_AF_L2VPN_EVPN;
2454 : case SAFI_UNICAST:
2455 : case SAFI_MULTICAST:
2456 : case SAFI_LABELED_UNICAST:
2457 : case SAFI_MPLS_VPN:
2458 : case SAFI_ENCAP:
2459 : case SAFI_FLOWSPEC:
2460 : case SAFI_UNSPEC:
2461 : case SAFI_MAX:
2462 : return BGP_AF_MAX;
2463 : }
2464 : break;
2465 : case AFI_UNSPEC:
2466 : case AFI_MAX:
2467 : return BGP_AF_MAX;
2468 : }
2469 :
2470 0 : assert(!"Reached end of function we should never hit");
2471 : }
2472 :
2473 : /* If the peer is not a peer-group but is bound to a peer-group return 1 */
2474 307 : static inline int peer_group_active(struct peer *peer)
2475 : {
2476 307 : if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
2477 0 : return 1;
2478 : return 0;
2479 : }
2480 :
2481 : /* If peer is negotiated at least one address family return 1. */
2482 94 : static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
2483 : {
2484 94 : if (peer->afc_nego[afi][SAFI_UNICAST]
2485 90 : || peer->afc_nego[afi][SAFI_MULTICAST]
2486 90 : || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
2487 90 : || peer->afc_nego[afi][SAFI_MPLS_VPN]
2488 90 : || peer->afc_nego[afi][SAFI_ENCAP]
2489 90 : || peer->afc_nego[afi][SAFI_FLOWSPEC]
2490 90 : || peer->afc_nego[afi][SAFI_EVPN])
2491 4 : return 1;
2492 : return 0;
2493 : }
2494 :
2495 : /* If at least one address family activated for group, return 1. */
2496 0 : static inline int peer_group_af_configured(struct peer_group *group)
2497 : {
2498 0 : struct peer *peer = group->conf;
2499 :
2500 0 : if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
2501 : || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
2502 0 : || peer->afc[AFI_IP][SAFI_FLOWSPEC]
2503 0 : || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
2504 : || peer->afc[AFI_IP6][SAFI_UNICAST]
2505 0 : || peer->afc[AFI_IP6][SAFI_MULTICAST]
2506 0 : || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
2507 : || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
2508 0 : || peer->afc[AFI_IP6][SAFI_ENCAP]
2509 : || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
2510 0 : || peer->afc[AFI_L2VPN][SAFI_EVPN])
2511 0 : return 1;
2512 : return 0;
2513 : }
2514 :
2515 0 : static inline char *timestamp_string(time_t ts)
2516 : {
2517 0 : time_t tbuf;
2518 0 : tbuf = time(NULL) - (monotime(NULL) - ts);
2519 0 : return ctime(&tbuf);
2520 : }
2521 :
2522 3318 : static inline bool peer_established(struct peer *peer)
2523 : {
2524 3318 : return peer->status == Established;
2525 : }
2526 :
2527 1432 : static inline bool peer_dynamic_neighbor(struct peer *peer)
2528 : {
2529 1143 : return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
2530 : }
2531 :
2532 289 : static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
2533 : {
2534 289 : return (peer_dynamic_neighbor(peer) &&
2535 0 : !CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
2536 : }
2537 :
2538 585 : static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
2539 : {
2540 585 : return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
2541 : }
2542 :
2543 : /* Lookup VRF for BGP instance based on its type. */
2544 135 : static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
2545 : {
2546 135 : struct vrf *vrf;
2547 :
2548 135 : if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2549 135 : vrf = vrf_lookup_by_id(VRF_DEFAULT);
2550 0 : else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2551 0 : vrf = vrf_lookup_by_name(bgp->name);
2552 : else
2553 : vrf = NULL;
2554 :
2555 135 : return vrf;
2556 : }
2557 :
2558 : static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
2559 : {
2560 : struct vrf *vrf;
2561 : struct interface *ifp;
2562 : uint32_t count = 0;
2563 :
2564 : /* if there is one interface in the vrf which is up then it is deemed
2565 : * active
2566 : */
2567 : vrf = bgp_vrf_lookup_by_instance_type(bgp);
2568 : if (vrf == NULL)
2569 : return 0;
2570 : RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
2571 : if (strcmp(ifp->name, bgp->name) == 0)
2572 : continue;
2573 : if (!active || if_is_up(ifp))
2574 : count++;
2575 : }
2576 : return count;
2577 : }
2578 :
2579 : /* Link BGP instance to VRF. */
2580 45 : static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
2581 : {
2582 45 : bgp->vrf_id = vrf->vrf_id;
2583 45 : if (vrf->info != (void *)bgp)
2584 45 : vrf->info = (void *)bgp_lock(bgp);
2585 : }
2586 :
2587 : /* Unlink BGP instance from VRF. */
2588 45 : static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
2589 : {
2590 45 : if (vrf->info == (void *)bgp) {
2591 45 : vrf->info = NULL;
2592 45 : bgp_unlock(bgp);
2593 : }
2594 45 : bgp->vrf_id = VRF_UNKNOWN;
2595 45 : }
2596 :
2597 256 : static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
2598 : {
2599 : /* True if either set for this instance or globally */
2600 256 : return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
2601 256 : !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
2602 : }
2603 :
2604 : /* For benefit of rfapi */
2605 : extern struct peer *peer_new(struct bgp *bgp);
2606 :
2607 : extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
2608 : const char *ip_str, bool use_json);
2609 : extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
2610 : const char *name,
2611 : enum bgp_instance_type inst_type);
2612 :
2613 : /* Hooks */
2614 : DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
2615 : (bgp, ifp));
2616 : DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
2617 : DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
2618 : DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
2619 : DECLARE_HOOK(bgp_snmp_update_stats,
2620 : (struct bgp_node *rn, struct bgp_path_info *pi, bool added),
2621 : (rn, pi, added));
2622 : DECLARE_HOOK(bgp_rpki_prefix_status,
2623 : (struct peer * peer, struct attr *attr,
2624 : const struct prefix *prefix),
2625 : (peer, attr, prefix));
2626 :
2627 : void peer_nsf_stop(struct peer *peer);
2628 :
2629 : void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
2630 : void peer_tcp_mss_unset(struct peer *peer);
2631 :
2632 : extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
2633 : safi_t safi);
2634 : extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
2635 : int outbound);
2636 : extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
2637 : size_t size);
2638 : #ifdef _FRR_ATTRIBUTE_PRINTFRR
2639 : /* clang-format off */
2640 : #pragma FRR printfrr_ext "%pBP" (struct peer *)
2641 : /* clang-format on */
2642 : #endif
2643 :
2644 : #endif /* _QUAGGA_BGPD_H */
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