1 /* BGP routing information base
2 * Copyright (C) 1996, 97, 98, 2000 Kunihiro Ishiguro
4 * This file is part of GNU Zebra.
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
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.
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
21 #ifndef _QUAGGA_BGP_ROUTE_H
22 #define _QUAGGA_BGP_ROUTE_H
26 #include "bgp_table.h"
28 struct bgp_nexthop_cache
;
29 struct bgp_route_evpn
;
34 bgp_show_type_prefix_list
,
35 bgp_show_type_filter_list
,
36 bgp_show_type_route_map
,
37 bgp_show_type_neighbor
,
38 bgp_show_type_cidr_only
,
39 bgp_show_type_prefix_longer
,
40 bgp_show_type_community_all
,
41 bgp_show_type_community
,
42 bgp_show_type_community_exact
,
43 bgp_show_type_community_list
,
44 bgp_show_type_community_list_exact
,
45 bgp_show_type_lcommunity_all
,
46 bgp_show_type_lcommunity
,
47 bgp_show_type_lcommunity_list
,
48 bgp_show_type_flap_statistics
,
49 bgp_show_type_flap_neighbor
,
50 bgp_show_type_dampend_paths
,
51 bgp_show_type_damp_neighbor
,
56 #define BGP_SHOW_SCODE_HEADER \
57 "Status codes: s suppressed, d damped, " \
58 "h history, * valid, > best, = multipath,\n" \
59 " i internal, r RIB-failure, S Stale, R Removed\n"
60 #define BGP_SHOW_OCODE_HEADER "Origin codes: i - IGP, e - EGP, ? - incomplete\n\n"
61 #define BGP_SHOW_NCODE_HEADER "Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self\n"
62 #define BGP_SHOW_HEADER " Network Next Hop Metric LocPrf Weight Path\n"
64 /* Maximum number of labels we can process or send with a prefix. We
65 * really do only 1 for MPLS (BGP-LU) but we can do 2 for EVPN-VxLAN.
67 #define BGP_MAX_LABELS 2
69 /* Ancillary information to struct bgp_info,
70 * used for uncommonly used data (aggregation, MPLS, etc.)
71 * and lazily allocated to save memory.
73 struct bgp_info_extra
{
74 /* Pointer to dampening structure. */
75 struct bgp_damp_info
*damp_info
;
77 /* This route is suppressed with aggregation. */
80 /* Nexthop reachability check. */
83 /* MPLS label(s) - VNI(s) for EVPN-VxLAN */
84 mpls_label_t label
[BGP_MAX_LABELS
];
91 void *rfapi_handle
; /* export: NVE advertising this
93 struct list
*local_nexthops
; /* optional, for static
99 void *hme
; /* encap monitor, if this is a VPN route */
101 rd
; /* import: route's route-distinguisher */
102 uint8_t un_family
; /* family of cached un address, 0 if
105 struct in_addr addr4
;
106 struct in6_addr addr6
;
107 } un
; /* cached un address */
109 struct prefix aux_prefix
; /* AFI_L2VPN: the IP addr,
116 /* For imported routes into a VNI (or VRF), this points to the parent.
121 * Some tunnelish parameters follow. Maybe consolidate into an
122 * internal tunnel structure?
126 * Original bgp instance for imported routes. Needed for:
127 * 1. Find all routes from a specific vrf for deletion
128 * 2. vrf context of original nexthop
130 * Store pointer to bgp instance rather than bgp->vrf_id because
131 * bgp->vrf_id is not always valid (or may change?).
133 * Set to NULL if route is not imported from another bgp instance.
135 struct bgp
*bgp_orig
;
138 * Nexthop in context of original bgp instance. Needed
139 * for label resolution of core mpls routes exported to a vrf.
140 * Set nexthop_orig.family to 0 if not valid.
142 struct prefix nexthop_orig
;
146 /* For linked list. */
147 struct bgp_info
*next
;
148 struct bgp_info
*prev
;
150 /* For nexthop linked list */
151 LIST_ENTRY(bgp_info
) nh_thread
;
153 /* Back pointer to the prefix node */
154 struct bgp_node
*net
;
156 /* Back pointer to the nexthop structure */
157 struct bgp_nexthop_cache
*nexthop
;
159 /* Peer structure. */
162 /* Attribute structure. */
165 /* Extra information */
166 struct bgp_info_extra
*extra
;
169 /* Multipath information */
170 struct bgp_info_mpath
*mpath
;
175 /* reference count */
178 /* BGP information status. */
180 #define BGP_INFO_IGP_CHANGED (1 << 0)
181 #define BGP_INFO_DAMPED (1 << 1)
182 #define BGP_INFO_HISTORY (1 << 2)
183 #define BGP_INFO_SELECTED (1 << 3)
184 #define BGP_INFO_VALID (1 << 4)
185 #define BGP_INFO_ATTR_CHANGED (1 << 5)
186 #define BGP_INFO_DMED_CHECK (1 << 6)
187 #define BGP_INFO_DMED_SELECTED (1 << 7)
188 #define BGP_INFO_STALE (1 << 8)
189 #define BGP_INFO_REMOVED (1 << 9)
190 #define BGP_INFO_COUNTED (1 << 10)
191 #define BGP_INFO_MULTIPATH (1 << 11)
192 #define BGP_INFO_MULTIPATH_CHG (1 << 12)
193 #define BGP_INFO_RIB_ATTR_CHG (1 << 13)
194 #define BGP_INFO_ANNC_NH_SELF (1 << 14)
196 /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
199 /* When above type is BGP. This sub type specify BGP sub type
202 #define BGP_ROUTE_NORMAL 0
203 #define BGP_ROUTE_STATIC 1
204 #define BGP_ROUTE_AGGREGATE 2
205 #define BGP_ROUTE_REDISTRIBUTE 3
206 #ifdef ENABLE_BGP_VNC
207 # define BGP_ROUTE_RFP 4
209 #define BGP_ROUTE_IMPORTED 5 /* from another bgp instance/safi */
211 unsigned short instance
;
213 /* Addpath identifiers */
214 uint32_t addpath_rx_id
;
215 uint32_t addpath_tx_id
;
218 /* Structure used in BGP path selection */
219 struct bgp_info_pair
{
220 struct bgp_info
*old
;
221 struct bgp_info
*new;
224 /* BGP static route configuration. */
226 /* Backdoor configuration. */
229 /* Label index configuration; applies to LU prefixes. */
230 uint32_t label_index
;
231 #define BGP_INVALID_LABEL_INDEX 0xFFFFFFFF
233 /* Import check status. */
240 struct in_addr igpnexthop
;
242 /* Atomic set reference count (ie cause of pathlimit) */
245 /* BGP redistribute route-map. */
248 struct route_map
*map
;
251 /* Route Distinguisher */
252 struct prefix_rd prd
;
258 struct eth_segment_id
*eth_s_id
;
259 struct ethaddr
*router_mac
;
260 uint16_t encap_tunneltype
;
261 struct prefix gatewayIp
;
264 #define BGP_NEXTHOP_AFI_FROM_NHLEN(nhlen) \
265 ((nhlen) < IPV4_MAX_BYTELEN \
267 : ((nhlen) < IPV6_MAX_BYTELEN ? AFI_IP : AFI_IP6))
269 #define BGP_ATTR_NEXTHOP_AFI_IP6(attr) \
270 (!CHECK_FLAG(attr->flag, ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP)) \
271 && ((attr)->mp_nexthop_len == 16 || (attr)->mp_nexthop_len == 32))
272 #define BGP_INFO_COUNTABLE(BI) \
273 (!CHECK_FLAG((BI)->flags, BGP_INFO_HISTORY) \
274 && !CHECK_FLAG((BI)->flags, BGP_INFO_REMOVED))
276 /* Flags which indicate a route is unuseable in some form */
277 #define BGP_INFO_UNUSEABLE \
278 (BGP_INFO_HISTORY | BGP_INFO_DAMPED | BGP_INFO_REMOVED)
279 /* Macro to check BGP information is alive or not. Sadly,
280 * not equivalent to just checking previous, because of the
281 * sense of the additional VALID flag.
283 #define BGP_INFO_HOLDDOWN(BI) \
284 (!CHECK_FLAG((BI)->flags, BGP_INFO_VALID) \
285 || CHECK_FLAG((BI)->flags, BGP_INFO_UNUSEABLE))
287 #define DISTRIBUTE_IN_NAME(F) ((F)->dlist[FILTER_IN].name)
288 #define DISTRIBUTE_IN(F) ((F)->dlist[FILTER_IN].alist)
289 #define DISTRIBUTE_OUT_NAME(F) ((F)->dlist[FILTER_OUT].name)
290 #define DISTRIBUTE_OUT(F) ((F)->dlist[FILTER_OUT].alist)
292 #define PREFIX_LIST_IN_NAME(F) ((F)->plist[FILTER_IN].name)
293 #define PREFIX_LIST_IN(F) ((F)->plist[FILTER_IN].plist)
294 #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
295 #define PREFIX_LIST_OUT(F) ((F)->plist[FILTER_OUT].plist)
297 #define FILTER_LIST_IN_NAME(F) ((F)->aslist[FILTER_IN].name)
298 #define FILTER_LIST_IN(F) ((F)->aslist[FILTER_IN].aslist)
299 #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
300 #define FILTER_LIST_OUT(F) ((F)->aslist[FILTER_OUT].aslist)
302 #define ROUTE_MAP_IN_NAME(F) ((F)->map[RMAP_IN].name)
303 #define ROUTE_MAP_IN(F) ((F)->map[RMAP_IN].map)
304 #define ROUTE_MAP_OUT_NAME(F) ((F)->map[RMAP_OUT].name)
305 #define ROUTE_MAP_OUT(F) ((F)->map[RMAP_OUT].map)
307 #define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
308 #define UNSUPPRESS_MAP(F) ((F)->usmap.map)
310 /* path PREFIX (addpath rxid NUMBER) */
311 #define PATH_ADDPATH_STR_BUFFER PREFIX2STR_BUFFER + 32
313 enum bgp_path_type
{ BGP_PATH_ALL
, BGP_PATH_BESTPATH
, BGP_PATH_MULTIPATH
};
315 static inline void bgp_bump_version(struct bgp_node
*node
)
317 node
->version
= bgp_table_next_version(bgp_node_table(node
));
320 static inline int bgp_fibupd_safi(safi_t safi
)
322 if (safi
== SAFI_UNICAST
|| safi
== SAFI_MULTICAST
323 || safi
== SAFI_LABELED_UNICAST
324 || safi
== SAFI_FLOWSPEC
)
330 extern void bgp_rib_remove(struct bgp_node
*rn
, struct bgp_info
*ri
,
331 struct peer
*peer
, afi_t afi
, safi_t safi
);
332 extern void bgp_process_queue_init(void);
333 extern void bgp_route_init(void);
334 extern void bgp_route_finish(void);
335 extern void bgp_cleanup_routes(struct bgp
*);
336 extern void bgp_announce_route(struct peer
*, afi_t
, safi_t
);
337 extern void bgp_stop_announce_route_timer(struct peer_af
*paf
);
338 extern void bgp_announce_route_all(struct peer
*);
339 extern void bgp_default_originate(struct peer
*, afi_t
, safi_t
, int);
340 extern void bgp_soft_reconfig_in(struct peer
*, afi_t
, safi_t
);
341 extern void bgp_clear_route(struct peer
*, afi_t
, safi_t
);
342 extern void bgp_clear_route_all(struct peer
*);
343 extern void bgp_clear_adj_in(struct peer
*, afi_t
, safi_t
);
344 extern void bgp_clear_stale_route(struct peer
*, afi_t
, safi_t
);
346 extern struct bgp_node
*bgp_afi_node_get(struct bgp_table
*table
, afi_t afi
,
347 safi_t safi
, struct prefix
*p
,
348 struct prefix_rd
*prd
);
349 extern struct bgp_info
*bgp_info_lock(struct bgp_info
*);
350 extern struct bgp_info
*bgp_info_unlock(struct bgp_info
*);
351 extern void bgp_info_add(struct bgp_node
*rn
, struct bgp_info
*ri
);
352 extern void bgp_info_reap(struct bgp_node
*rn
, struct bgp_info
*ri
);
353 extern void bgp_info_delete(struct bgp_node
*rn
, struct bgp_info
*ri
);
354 extern struct bgp_info_extra
*bgp_info_extra_get(struct bgp_info
*);
355 extern void bgp_info_set_flag(struct bgp_node
*, struct bgp_info
*, uint32_t);
356 extern void bgp_info_unset_flag(struct bgp_node
*, struct bgp_info
*, uint32_t);
357 extern void bgp_info_path_with_addpath_rx_str(struct bgp_info
*ri
, char *buf
);
359 extern int bgp_nlri_parse_ip(struct peer
*, struct attr
*, struct bgp_nlri
*);
361 extern int bgp_maximum_prefix_overflow(struct peer
*, afi_t
, safi_t
, int);
363 extern void bgp_redistribute_add(struct bgp
*bgp
, struct prefix
*p
,
364 const union g_addr
*nexthop
, ifindex_t ifindex
,
365 enum nexthop_types_t nhtype
, uint32_t metric
,
366 uint8_t type
, unsigned short instance
,
368 extern void bgp_redistribute_delete(struct bgp
*, struct prefix
*, uint8_t,
370 extern void bgp_redistribute_withdraw(struct bgp
*, afi_t
, int, unsigned short);
372 extern void bgp_static_add(struct bgp
*);
373 extern void bgp_static_delete(struct bgp
*);
374 extern void bgp_static_redo_import_check(struct bgp
*);
375 extern void bgp_purge_static_redist_routes(struct bgp
*bgp
);
376 extern void bgp_static_update(struct bgp
*, struct prefix
*,
377 struct bgp_static
*, afi_t
, safi_t
);
378 extern void bgp_static_withdraw(struct bgp
*, struct prefix
*, afi_t
, safi_t
);
380 extern int bgp_static_set_safi(afi_t afi
, safi_t safi
, struct vty
*vty
,
381 const char *, const char *, const char *,
382 const char *, int, const char *, const char *,
383 const char *, const char *);
385 extern int bgp_static_unset_safi(afi_t afi
, safi_t safi
, struct vty
*,
386 const char *, const char *, const char *, int,
387 const char *, const char *, const char *);
389 /* this is primarily for MPLS-VPN */
390 extern int bgp_update(struct peer
*, struct prefix
*, uint32_t, struct attr
*,
391 afi_t
, safi_t
, int, int, struct prefix_rd
*,
392 mpls_label_t
*, uint32_t, int, struct bgp_route_evpn
*);
393 extern int bgp_withdraw(struct peer
*, struct prefix
*, uint32_t, struct attr
*,
394 afi_t
, safi_t
, int, int, struct prefix_rd
*,
395 mpls_label_t
*, uint32_t, struct bgp_route_evpn
*);
397 /* for bgp_nexthop and bgp_damp */
398 extern void bgp_process(struct bgp
*, struct bgp_node
*, afi_t
, safi_t
);
401 * Add an end-of-initial-update marker to the process queue. This is just a
402 * queue element with NULL bgp node.
404 extern void bgp_add_eoiu_mark(struct bgp
*);
405 extern void bgp_config_write_table_map(struct vty
*, struct bgp
*, afi_t
,
407 extern void bgp_config_write_network(struct vty
*, struct bgp
*, afi_t
, safi_t
);
408 extern void bgp_config_write_distance(struct vty
*, struct bgp
*, afi_t
,
411 extern void bgp_aggregate_increment(struct bgp
*, struct prefix
*,
412 struct bgp_info
*, afi_t
, safi_t
);
413 extern void bgp_aggregate_decrement(struct bgp
*, struct prefix
*,
414 struct bgp_info
*, afi_t
, safi_t
);
416 extern uint8_t bgp_distance_apply(struct prefix
*, struct bgp_info
*, afi_t
,
417 safi_t
, struct bgp
*);
419 extern afi_t
bgp_node_afi(struct vty
*);
420 extern safi_t
bgp_node_safi(struct vty
*);
422 extern struct bgp_info
*info_make(int type
, int sub_type
,
423 unsigned short instance
, struct peer
*peer
,
424 struct attr
*attr
, struct bgp_node
*rn
);
426 extern void route_vty_out(struct vty
*, struct prefix
*, struct bgp_info
*, int,
427 safi_t
, json_object
*);
428 extern void route_vty_out_tag(struct vty
*, struct prefix
*, struct bgp_info
*,
429 int, safi_t
, json_object
*);
430 extern void route_vty_out_tmp(struct vty
*, struct prefix
*, struct attr
*,
431 safi_t
, uint8_t, json_object
*);
432 extern void route_vty_out_overlay(struct vty
*vty
, struct prefix
*p
,
433 struct bgp_info
*binfo
, int display
,
436 extern int subgroup_process_announce_selected(struct update_subgroup
*subgrp
,
437 struct bgp_info
*selected
,
439 uint32_t addpath_tx_id
);
441 extern int subgroup_announce_check(struct bgp_node
*rn
, struct bgp_info
*ri
,
442 struct update_subgroup
*subgrp
,
443 struct prefix
*p
, struct attr
*attr
);
445 extern void bgp_peer_clear_node_queue_drain_immediate(struct peer
*peer
);
446 extern void bgp_process_queues_drain_immediate(void);
449 extern struct bgp_node
*bgp_afi_node_lookup(struct bgp_table
*table
, afi_t afi
,
450 safi_t safi
, struct prefix
*p
,
451 struct prefix_rd
*prd
);
452 extern struct bgp_info
*bgp_info_new(void);
453 extern void bgp_info_restore(struct bgp_node
*, struct bgp_info
*);
455 extern int bgp_info_cmp_compatible(struct bgp
*, struct bgp_info
*,
456 struct bgp_info
*, char *pfx_buf
, afi_t afi
,
458 extern void bgp_attr_add_gshut_community(struct attr
*attr
);
460 extern void bgp_best_selection(struct bgp
*bgp
, struct bgp_node
*rn
,
461 struct bgp_maxpaths_cfg
*mpath_cfg
,
462 struct bgp_info_pair
*result
, afi_t afi
,
464 extern void bgp_zebra_clear_route_change_flags(struct bgp_node
*rn
);
465 extern int bgp_zebra_has_route_changed(struct bgp_node
*rn
,
466 struct bgp_info
*selected
);
468 extern void route_vty_out_detail_header(struct vty
*vty
, struct bgp
*bgp
,
470 struct prefix_rd
*prd
, afi_t afi
,
471 safi_t safi
, json_object
*json
);
472 extern void route_vty_out_detail(struct vty
*vty
, struct bgp
*bgp
,
473 struct prefix
*p
, struct bgp_info
*binfo
,
474 afi_t afi
, safi_t safi
,
475 json_object
*json_paths
);
476 extern int bgp_show_table_rd(struct vty
*vty
, struct bgp
*bgp
, safi_t safi
,
477 struct bgp_table
*table
, struct prefix_rd
*prd
,
478 enum bgp_show_type type
, void *output_arg
,
480 #endif /* _QUAGGA_BGP_ROUTE_H */