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
17 along with GNU Zebra; see the file COPYING. If not, write to the Free
18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
21 #ifndef _QUAGGA_BGP_ROUTE_H
22 #define _QUAGGA_BGP_ROUTE_H
25 #include "bgp_table.h"
27 struct bgp_nexthop_cache;
29 /* Ancillary information to struct bgp_info,
30 * used for uncommonly used data (aggregation, MPLS, etc.)
31 * and lazily allocated to save memory.
35 /* Pointer to dampening structure. */
36 struct bgp_damp_info *damp_info;
38 /* This route is suppressed with aggregation. */
41 /* Nexthop reachability check. */
50 /* For linked list. */
51 struct bgp_info *next;
52 struct bgp_info *prev;
54 /* For nexthop linked list */
55 LIST_ENTRY(bgp_info) nh_thread;
57 /* Back pointer to the prefix node */
60 /* Back pointer to the nexthop structure */
61 struct bgp_nexthop_cache *nexthop;
66 /* Attribute structure. */
69 /* Extra information */
70 struct bgp_info_extra *extra;
73 /* Multipath information */
74 struct bgp_info_mpath *mpath;
82 /* BGP information status. */
84 #define BGP_INFO_IGP_CHANGED (1 << 0)
85 #define BGP_INFO_DAMPED (1 << 1)
86 #define BGP_INFO_HISTORY (1 << 2)
87 #define BGP_INFO_SELECTED (1 << 3)
88 #define BGP_INFO_VALID (1 << 4)
89 #define BGP_INFO_ATTR_CHANGED (1 << 5)
90 #define BGP_INFO_DMED_CHECK (1 << 6)
91 #define BGP_INFO_DMED_SELECTED (1 << 7)
92 #define BGP_INFO_STALE (1 << 8)
93 #define BGP_INFO_REMOVED (1 << 9)
94 #define BGP_INFO_COUNTED (1 << 10)
95 #define BGP_INFO_MULTIPATH (1 << 11)
96 #define BGP_INFO_MULTIPATH_CHG (1 << 12)
98 /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
101 /* When above type is BGP. This sub type specify BGP sub type
104 #define BGP_ROUTE_NORMAL 0
105 #define BGP_ROUTE_STATIC 1
106 #define BGP_ROUTE_AGGREGATE 2
107 #define BGP_ROUTE_REDISTRIBUTE 3
110 /* BGP static route configuration. */
113 /* Backdoor configuration. */
116 /* Import check status. */
123 struct in_addr igpnexthop;
125 /* Atomic set reference count (ie cause of pathlimit) */
128 /* BGP redistribute route-map. */
132 struct route_map *map;
135 /* Route Distinguisher */
136 struct prefix_rd prd;
142 #define BGP_INFO_COUNTABLE(BI) \
143 (! CHECK_FLAG ((BI)->flags, BGP_INFO_HISTORY) \
144 && ! CHECK_FLAG ((BI)->flags, BGP_INFO_REMOVED))
146 /* Flags which indicate a route is unuseable in some form */
147 #define BGP_INFO_UNUSEABLE \
148 (BGP_INFO_HISTORY|BGP_INFO_DAMPED|BGP_INFO_REMOVED)
149 /* Macro to check BGP information is alive or not. Sadly,
150 * not equivalent to just checking previous, because of the
151 * sense of the additional VALID flag.
153 #define BGP_INFO_HOLDDOWN(BI) \
154 (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID) \
155 || CHECK_FLAG ((BI)->flags, BGP_INFO_UNUSEABLE))
157 #define DISTRIBUTE_IN_NAME(F) ((F)->dlist[FILTER_IN].name)
158 #define DISTRIBUTE_IN(F) ((F)->dlist[FILTER_IN].alist)
159 #define DISTRIBUTE_OUT_NAME(F) ((F)->dlist[FILTER_OUT].name)
160 #define DISTRIBUTE_OUT(F) ((F)->dlist[FILTER_OUT].alist)
162 #define PREFIX_LIST_IN_NAME(F) ((F)->plist[FILTER_IN].name)
163 #define PREFIX_LIST_IN(F) ((F)->plist[FILTER_IN].plist)
164 #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
165 #define PREFIX_LIST_OUT(F) ((F)->plist[FILTER_OUT].plist)
167 #define FILTER_LIST_IN_NAME(F) ((F)->aslist[FILTER_IN].name)
168 #define FILTER_LIST_IN(F) ((F)->aslist[FILTER_IN].aslist)
169 #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
170 #define FILTER_LIST_OUT(F) ((F)->aslist[FILTER_OUT].aslist)
172 #define ROUTE_MAP_IN_NAME(F) ((F)->map[RMAP_IN].name)
173 #define ROUTE_MAP_IN(F) ((F)->map[RMAP_IN].map)
174 #define ROUTE_MAP_OUT_NAME(F) ((F)->map[RMAP_OUT].name)
175 #define ROUTE_MAP_OUT(F) ((F)->map[RMAP_OUT].map)
177 #define ROUTE_MAP_IMPORT_NAME(F) ((F)->map[RMAP_IMPORT].name)
178 #define ROUTE_MAP_IMPORT(F) ((F)->map[RMAP_IMPORT].map)
179 #define ROUTE_MAP_EXPORT_NAME(F) ((F)->map[RMAP_EXPORT].name)
180 #define ROUTE_MAP_EXPORT(F) ((F)->map[RMAP_EXPORT].map)
182 #define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
183 #define UNSUPPRESS_MAP(F) ((F)->usmap.map)
185 enum bgp_clear_route_type
187 BGP_CLEAR_ROUTE_NORMAL,
188 BGP_CLEAR_ROUTE_MY_RSCLIENT
199 extern void bgp_route_init (void);
200 extern void bgp_route_finish (void);
201 extern void bgp_cleanup_routes (void);
202 extern void bgp_announce_route (struct peer *, afi_t, safi_t);
203 extern void bgp_announce_route_all (struct peer *);
204 extern void bgp_default_originate (struct peer *, afi_t, safi_t, int);
205 extern void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
206 extern void bgp_soft_reconfig_rsclient (struct peer *, afi_t, safi_t);
207 extern void bgp_check_local_routes_rsclient (struct peer *rsclient, afi_t afi, safi_t safi);
208 extern void bgp_clear_route (struct peer *, afi_t, safi_t,
209 enum bgp_clear_route_type);
210 extern void bgp_clear_route_all (struct peer *);
211 extern void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
212 extern void bgp_clear_stale_route (struct peer *, afi_t, safi_t);
214 extern struct bgp_info *bgp_info_lock (struct bgp_info *);
215 extern struct bgp_info *bgp_info_unlock (struct bgp_info *);
216 extern void bgp_info_add (struct bgp_node *rn, struct bgp_info *ri);
217 extern void bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri);
218 extern struct bgp_info_extra *bgp_info_extra_get (struct bgp_info *);
219 extern void bgp_info_set_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
220 extern void bgp_info_unset_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
222 extern int bgp_nlri_parse_ip (struct peer *, struct attr *, struct bgp_nlri *);
224 extern int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
226 extern void bgp_redistribute_add (struct prefix *, const struct in_addr *,
227 const struct in6_addr *,
228 u_int32_t, u_char, route_tag_t);
229 extern void bgp_redistribute_delete (struct prefix *, u_char);
230 extern void bgp_redistribute_withdraw (struct bgp *, afi_t, int);
232 extern void bgp_static_delete (struct bgp *);
233 extern void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
235 extern void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
237 extern int bgp_static_set_safi (safi_t safi, struct vty *vty, const char *,
238 const char *, const char *, const char *);
240 extern int bgp_static_unset_safi (safi_t safi, struct vty *, const char *,
241 const char *, const char *);
243 /* this is primarily for MPLS-VPN */
244 extern int bgp_update (struct peer *, struct prefix *, struct attr *,
245 afi_t, safi_t, int, int, struct prefix_rd *,
247 extern int bgp_withdraw (struct peer *, struct prefix *, struct attr *,
248 afi_t, safi_t, int, int, struct prefix_rd *, u_char *);
250 /* for bgp_nexthop and bgp_damp */
251 extern void bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t);
252 extern int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
253 extern int bgp_config_write_distance (struct vty *, struct bgp *, afi_t, safi_t, int *);
255 extern void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
257 extern void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
260 extern u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
261 extern u_char ipv6_bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
263 extern afi_t bgp_node_afi (struct vty *);
264 extern safi_t bgp_node_safi (struct vty *);
266 extern void route_vty_out (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
267 extern void route_vty_out_tag (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
268 extern void route_vty_out_tmp (struct vty *, struct prefix *, struct attr *, safi_t);
270 extern void bgp_peer_clear_node_queue_drain_immediate (struct peer *peer);
271 extern void bgp_process_queues_drain_immediate (void);
273 #endif /* _QUAGGA_BGP_ROUTE_H */