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_HEADER " Network Next Hop Metric LocPrf Weight Path\n"
63 /* Maximum number of labels we can process or send with a prefix. We
64 * really do only 1 for MPLS (BGP-LU) but we can do 2 for EVPN-VxLAN.
66 #define BGP_MAX_LABELS 2
68 /* Ancillary information to struct bgp_info,
69 * used for uncommonly used data (aggregation, MPLS, etc.)
70 * and lazily allocated to save memory.
72 struct bgp_info_extra
{
73 /* Pointer to dampening structure. */
74 struct bgp_damp_info
*damp_info
;
76 /* This route is suppressed with aggregation. */
79 /* Nexthop reachability check. */
82 /* MPLS label(s) - VNI(s) for EVPN-VxLAN */
83 mpls_label_t label
[BGP_MAX_LABELS
];
90 void *rfapi_handle
; /* export: NVE advertising this
92 struct list
*local_nexthops
; /* optional, for static
98 void *hme
; /* encap monitor, if this is a VPN route */
100 rd
; /* import: route's route-distinguisher */
101 uint8_t un_family
; /* family of cached un address, 0 if
104 struct in_addr addr4
;
105 struct in6_addr addr6
;
106 } un
; /* cached un address */
108 struct prefix aux_prefix
; /* AFI_L2VPN: the IP addr,
115 /* For imported routes into a VNI (or VRF), this points to the parent.
120 * Some tunnelish parameters follow. Maybe consolidate into an
121 * internal tunnel structure?
125 * Original bgp instance for imported routes. Needed for:
126 * 1. Find all routes from a specific vrf for deletion
127 * 2. vrf context of original nexthop
129 * Store pointer to bgp instance rather than bgp->vrf_id because
130 * bgp->vrf_id is not always valid (or may change?).
132 * Set to NULL if route is not imported from another bgp instance.
134 struct bgp
*bgp_orig
;
137 * Nexthop in context of original bgp instance. Needed
138 * for label resolution of core mpls routes exported to a vrf.
139 * Set nexthop_orig.family to 0 if not valid.
141 struct prefix nexthop_orig
;
145 /* For linked list. */
146 struct bgp_info
*next
;
147 struct bgp_info
*prev
;
149 /* For nexthop linked list */
150 LIST_ENTRY(bgp_info
) nh_thread
;
152 /* Back pointer to the prefix node */
153 struct bgp_node
*net
;
155 /* Back pointer to the nexthop structure */
156 struct bgp_nexthop_cache
*nexthop
;
158 /* Peer structure. */
161 /* Attribute structure. */
164 /* Extra information */
165 struct bgp_info_extra
*extra
;
168 /* Multipath information */
169 struct bgp_info_mpath
*mpath
;
174 /* reference count */
177 /* BGP information status. */
179 #define BGP_INFO_IGP_CHANGED (1 << 0)
180 #define BGP_INFO_DAMPED (1 << 1)
181 #define BGP_INFO_HISTORY (1 << 2)
182 #define BGP_INFO_SELECTED (1 << 3)
183 #define BGP_INFO_VALID (1 << 4)
184 #define BGP_INFO_ATTR_CHANGED (1 << 5)
185 #define BGP_INFO_DMED_CHECK (1 << 6)
186 #define BGP_INFO_DMED_SELECTED (1 << 7)
187 #define BGP_INFO_STALE (1 << 8)
188 #define BGP_INFO_REMOVED (1 << 9)
189 #define BGP_INFO_COUNTED (1 << 10)
190 #define BGP_INFO_MULTIPATH (1 << 11)
191 #define BGP_INFO_MULTIPATH_CHG (1 << 12)
192 #define BGP_INFO_RIB_ATTR_CHG (1 << 13)
194 /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
197 /* When above type is BGP. This sub type specify BGP sub type
200 #define BGP_ROUTE_NORMAL 0
201 #define BGP_ROUTE_STATIC 1
202 #define BGP_ROUTE_AGGREGATE 2
203 #define BGP_ROUTE_REDISTRIBUTE 3
204 #ifdef ENABLE_BGP_VNC
205 # define BGP_ROUTE_RFP 4
207 #define BGP_ROUTE_IMPORTED 5 /* from another bgp instance/safi */
209 unsigned short instance
;
211 /* Addpath identifiers */
212 uint32_t addpath_rx_id
;
213 uint32_t addpath_tx_id
;
216 /* Structure used in BGP path selection */
217 struct bgp_info_pair
{
218 struct bgp_info
*old
;
219 struct bgp_info
*new;
222 /* BGP static route configuration. */
224 /* Backdoor configuration. */
227 /* Label index configuration; applies to LU prefixes. */
228 uint32_t label_index
;
229 #define BGP_INVALID_LABEL_INDEX 0xFFFFFFFF
231 /* Import check status. */
238 struct in_addr igpnexthop
;
240 /* Atomic set reference count (ie cause of pathlimit) */
243 /* BGP redistribute route-map. */
246 struct route_map
*map
;
249 /* Route Distinguisher */
250 struct prefix_rd prd
;
256 struct eth_segment_id
*eth_s_id
;
257 struct ethaddr
*router_mac
;
258 uint16_t encap_tunneltype
;
259 struct prefix gatewayIp
;
262 #define BGP_NEXTHOP_AFI_FROM_NHLEN(nhlen) \
263 ((nhlen) < IPV4_MAX_BYTELEN \
265 : ((nhlen) < IPV6_MAX_BYTELEN ? AFI_IP : AFI_IP6))
267 #define BGP_ATTR_NEXTHOP_AFI_IP6(attr) \
268 (!CHECK_FLAG(attr->flag, ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP)) \
269 && ((attr)->mp_nexthop_len == 16 || (attr)->mp_nexthop_len == 32))
270 #define BGP_INFO_COUNTABLE(BI) \
271 (!CHECK_FLAG((BI)->flags, BGP_INFO_HISTORY) \
272 && !CHECK_FLAG((BI)->flags, BGP_INFO_REMOVED))
274 /* Flags which indicate a route is unuseable in some form */
275 #define BGP_INFO_UNUSEABLE \
276 (BGP_INFO_HISTORY | BGP_INFO_DAMPED | BGP_INFO_REMOVED)
277 /* Macro to check BGP information is alive or not. Sadly,
278 * not equivalent to just checking previous, because of the
279 * sense of the additional VALID flag.
281 #define BGP_INFO_HOLDDOWN(BI) \
282 (!CHECK_FLAG((BI)->flags, BGP_INFO_VALID) \
283 || CHECK_FLAG((BI)->flags, BGP_INFO_UNUSEABLE))
285 #define DISTRIBUTE_IN_NAME(F) ((F)->dlist[FILTER_IN].name)
286 #define DISTRIBUTE_IN(F) ((F)->dlist[FILTER_IN].alist)
287 #define DISTRIBUTE_OUT_NAME(F) ((F)->dlist[FILTER_OUT].name)
288 #define DISTRIBUTE_OUT(F) ((F)->dlist[FILTER_OUT].alist)
290 #define PREFIX_LIST_IN_NAME(F) ((F)->plist[FILTER_IN].name)
291 #define PREFIX_LIST_IN(F) ((F)->plist[FILTER_IN].plist)
292 #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
293 #define PREFIX_LIST_OUT(F) ((F)->plist[FILTER_OUT].plist)
295 #define FILTER_LIST_IN_NAME(F) ((F)->aslist[FILTER_IN].name)
296 #define FILTER_LIST_IN(F) ((F)->aslist[FILTER_IN].aslist)
297 #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
298 #define FILTER_LIST_OUT(F) ((F)->aslist[FILTER_OUT].aslist)
300 #define ROUTE_MAP_IN_NAME(F) ((F)->map[RMAP_IN].name)
301 #define ROUTE_MAP_IN(F) ((F)->map[RMAP_IN].map)
302 #define ROUTE_MAP_OUT_NAME(F) ((F)->map[RMAP_OUT].name)
303 #define ROUTE_MAP_OUT(F) ((F)->map[RMAP_OUT].map)
305 #define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
306 #define UNSUPPRESS_MAP(F) ((F)->usmap.map)
308 /* path PREFIX (addpath rxid NUMBER) */
309 #define PATH_ADDPATH_STR_BUFFER PREFIX2STR_BUFFER + 32
311 enum bgp_path_type
{ BGP_PATH_ALL
, BGP_PATH_BESTPATH
, BGP_PATH_MULTIPATH
};
313 static inline void bgp_bump_version(struct bgp_node
*node
)
315 node
->version
= bgp_table_next_version(bgp_node_table(node
));
318 static inline int bgp_fibupd_safi(safi_t safi
)
320 if (safi
== SAFI_UNICAST
|| safi
== SAFI_MULTICAST
321 || safi
== SAFI_LABELED_UNICAST
)
327 extern void bgp_rib_remove(struct bgp_node
*rn
, struct bgp_info
*ri
,
328 struct peer
*peer
, afi_t afi
, safi_t safi
);
329 extern void bgp_process_queue_init(void);
330 extern void bgp_route_init(void);
331 extern void bgp_route_finish(void);
332 extern void bgp_cleanup_routes(struct bgp
*);
333 extern void bgp_announce_route(struct peer
*, afi_t
, safi_t
);
334 extern void bgp_stop_announce_route_timer(struct peer_af
*paf
);
335 extern void bgp_announce_route_all(struct peer
*);
336 extern void bgp_default_originate(struct peer
*, afi_t
, safi_t
, int);
337 extern void bgp_soft_reconfig_in(struct peer
*, afi_t
, safi_t
);
338 extern void bgp_clear_route(struct peer
*, afi_t
, safi_t
);
339 extern void bgp_clear_route_all(struct peer
*);
340 extern void bgp_clear_adj_in(struct peer
*, afi_t
, safi_t
);
341 extern void bgp_clear_stale_route(struct peer
*, afi_t
, safi_t
);
343 extern struct bgp_node
*bgp_afi_node_get(struct bgp_table
*table
, afi_t afi
,
344 safi_t safi
, struct prefix
*p
,
345 struct prefix_rd
*prd
);
346 extern struct bgp_info
*bgp_info_lock(struct bgp_info
*);
347 extern struct bgp_info
*bgp_info_unlock(struct bgp_info
*);
348 extern void bgp_info_add(struct bgp_node
*rn
, struct bgp_info
*ri
);
349 extern void bgp_info_reap(struct bgp_node
*rn
, struct bgp_info
*ri
);
350 extern void bgp_info_delete(struct bgp_node
*rn
, struct bgp_info
*ri
);
351 extern struct bgp_info_extra
*bgp_info_extra_get(struct bgp_info
*);
352 extern void bgp_info_set_flag(struct bgp_node
*, struct bgp_info
*, uint32_t);
353 extern void bgp_info_unset_flag(struct bgp_node
*, struct bgp_info
*, uint32_t);
354 extern void bgp_info_path_with_addpath_rx_str(struct bgp_info
*ri
, char *buf
);
356 extern int bgp_nlri_parse_ip(struct peer
*, struct attr
*, struct bgp_nlri
*);
358 extern int bgp_maximum_prefix_overflow(struct peer
*, afi_t
, safi_t
, int);
360 extern void bgp_redistribute_add(struct bgp
*bgp
, struct prefix
*p
,
361 const union g_addr
*nexthop
, ifindex_t ifindex
,
362 enum nexthop_types_t nhtype
, uint32_t metric
,
363 uint8_t type
, unsigned short instance
,
365 extern void bgp_redistribute_delete(struct bgp
*, struct prefix
*, uint8_t,
367 extern void bgp_redistribute_withdraw(struct bgp
*, afi_t
, int, unsigned short);
369 extern void bgp_static_add(struct bgp
*);
370 extern void bgp_static_delete(struct bgp
*);
371 extern void bgp_static_redo_import_check(struct bgp
*);
372 extern void bgp_purge_static_redist_routes(struct bgp
*bgp
);
373 extern void bgp_static_update(struct bgp
*, struct prefix
*,
374 struct bgp_static
*, afi_t
, safi_t
);
375 extern void bgp_static_withdraw(struct bgp
*, struct prefix
*, afi_t
, safi_t
);
377 extern int bgp_static_set_safi(afi_t afi
, safi_t safi
, struct vty
*vty
,
378 const char *, const char *, const char *,
379 const char *, int, const char *, const char *,
380 const char *, const char *);
382 extern int bgp_static_unset_safi(afi_t afi
, safi_t safi
, struct vty
*,
383 const char *, const char *, const char *, int,
384 const char *, const char *, const char *);
386 /* this is primarily for MPLS-VPN */
387 extern int bgp_update(struct peer
*, struct prefix
*, uint32_t, struct attr
*,
388 afi_t
, safi_t
, int, int, struct prefix_rd
*,
389 mpls_label_t
*, uint32_t, int, struct bgp_route_evpn
*);
390 extern int bgp_withdraw(struct peer
*, struct prefix
*, uint32_t, struct attr
*,
391 afi_t
, safi_t
, int, int, struct prefix_rd
*,
392 mpls_label_t
*, uint32_t, struct bgp_route_evpn
*);
394 /* for bgp_nexthop and bgp_damp */
395 extern void bgp_process(struct bgp
*, struct bgp_node
*, afi_t
, safi_t
);
398 * Add an end-of-initial-update marker to the process queue. This is just a
399 * queue element with NULL bgp node.
401 extern void bgp_add_eoiu_mark(struct bgp
*);
402 extern void bgp_config_write_table_map(struct vty
*, struct bgp
*, afi_t
,
404 extern void bgp_config_write_network(struct vty
*, struct bgp
*, afi_t
, safi_t
);
405 extern void bgp_config_write_distance(struct vty
*, struct bgp
*, afi_t
,
408 extern void bgp_aggregate_increment(struct bgp
*, struct prefix
*,
409 struct bgp_info
*, afi_t
, safi_t
);
410 extern void bgp_aggregate_decrement(struct bgp
*, struct prefix
*,
411 struct bgp_info
*, afi_t
, safi_t
);
413 extern uint8_t bgp_distance_apply(struct prefix
*, struct bgp_info
*, afi_t
,
414 safi_t
, struct bgp
*);
416 extern afi_t
bgp_node_afi(struct vty
*);
417 extern safi_t
bgp_node_safi(struct vty
*);
419 extern struct bgp_info
*info_make(int type
, int sub_type
,
420 unsigned short instance
, struct peer
*peer
,
421 struct attr
*attr
, struct bgp_node
*rn
);
423 extern void route_vty_out(struct vty
*, struct prefix
*, struct bgp_info
*, int,
424 safi_t
, json_object
*);
425 extern void route_vty_out_tag(struct vty
*, struct prefix
*, struct bgp_info
*,
426 int, safi_t
, json_object
*);
427 extern void route_vty_out_tmp(struct vty
*, struct prefix
*, struct attr
*,
428 safi_t
, uint8_t, json_object
*);
429 extern void route_vty_out_overlay(struct vty
*vty
, struct prefix
*p
,
430 struct bgp_info
*binfo
, int display
,
433 extern int subgroup_process_announce_selected(struct update_subgroup
*subgrp
,
434 struct bgp_info
*selected
,
436 uint32_t addpath_tx_id
);
438 extern int subgroup_announce_check(struct bgp_node
*rn
, struct bgp_info
*ri
,
439 struct update_subgroup
*subgrp
,
440 struct prefix
*p
, struct attr
*attr
);
442 extern void bgp_peer_clear_node_queue_drain_immediate(struct peer
*peer
);
443 extern void bgp_process_queues_drain_immediate(void);
446 extern struct bgp_node
*bgp_afi_node_lookup(struct bgp_table
*table
, afi_t afi
,
447 safi_t safi
, struct prefix
*p
,
448 struct prefix_rd
*prd
);
449 extern struct bgp_info
*bgp_info_new(void);
450 extern void bgp_info_restore(struct bgp_node
*, struct bgp_info
*);
452 extern int bgp_info_cmp_compatible(struct bgp
*, struct bgp_info
*,
453 struct bgp_info
*, char *pfx_buf
, afi_t afi
,
455 extern void bgp_attr_add_gshut_community(struct attr
*attr
);
457 extern void bgp_best_selection(struct bgp
*bgp
, struct bgp_node
*rn
,
458 struct bgp_maxpaths_cfg
*mpath_cfg
,
459 struct bgp_info_pair
*result
, afi_t afi
,
461 extern void bgp_zebra_clear_route_change_flags(struct bgp_node
*rn
);
462 extern int bgp_zebra_has_route_changed(struct bgp_node
*rn
,
463 struct bgp_info
*selected
);
465 extern void route_vty_out_detail_header(struct vty
*vty
, struct bgp
*bgp
,
467 struct prefix_rd
*prd
, afi_t afi
,
468 safi_t safi
, json_object
*json
);
469 extern void route_vty_out_detail(struct vty
*vty
, struct bgp
*bgp
,
470 struct prefix
*p
, struct bgp_info
*binfo
,
471 afi_t afi
, safi_t safi
,
472 json_object
*json_paths
);
473 extern int bgp_show_table_rd(struct vty
*vty
, struct bgp
*bgp
, safi_t safi
,
474 struct bgp_table
*table
, struct prefix_rd
*prd
,
475 enum bgp_show_type type
, void *output_arg
,
477 #endif /* _QUAGGA_BGP_ROUTE_H */