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A valid BGP nexthop is flagged as invalid
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718e3744 1/* BGP routing information base
2 Copyright (C) 1996, 97, 98, 2000 Kunihiro Ishiguro
3
4This file is part of GNU Zebra.
5
6GNU Zebra is free software; you can redistribute it and/or modify it
7under the terms of the GNU General Public License as published by the
8Free Software Foundation; either version 2, or (at your option) any
9later version.
10
11GNU Zebra is distributed in the hope that it will be useful, but
12WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Zebra; see the file COPYING. If not, write to the Free
18Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
1902111-1307, USA. */
20
00d252cb 21#ifndef _QUAGGA_BGP_ROUTE_H
22#define _QUAGGA_BGP_ROUTE_H
23
fb018d25 24#include "queue.h"
200df115 25#include "bgp_table.h"
26
fb018d25
DS
27struct bgp_nexthop_cache;
28
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29/* Ancillary information to struct bgp_info,
30 * used for uncommonly used data (aggregation, MPLS, etc.)
31 * and lazily allocated to save memory.
32 */
33struct bgp_info_extra
34{
35 /* Pointer to dampening structure. */
36 struct bgp_damp_info *damp_info;
37
38 /* This route is suppressed with aggregation. */
39 int suppress;
40
41 /* Nexthop reachability check. */
42 u_int32_t igpmetric;
43
44 /* MPLS label. */
45 u_char tag[3];
46};
47
718e3744 48struct bgp_info
49{
50 /* For linked list. */
51 struct bgp_info *next;
52 struct bgp_info *prev;
fb018d25
DS
53
54 /* For nexthop linked list */
55 LIST_ENTRY(bgp_info) nh_thread;
56
57 /* Back pointer to the prefix node */
58 struct bgp_node *net;
59
60 /* Back pointer to the nexthop structure */
61 struct bgp_nexthop_cache *nexthop;
62
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63 /* Peer structure. */
64 struct peer *peer;
65
66 /* Attribute structure. */
67 struct attr *attr;
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68
69 /* Extra information */
70 struct bgp_info_extra *extra;
71
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JB
72
73 /* Multipath information */
74 struct bgp_info_mpath *mpath;
75
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76 /* Uptime. */
77 time_t uptime;
78
200df115 79 /* reference count */
228da428 80 int lock;
200df115 81
718e3744 82 /* BGP information status. */
93406d87 83 u_int16_t flags;
718e3744 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)
93406d87 92#define BGP_INFO_STALE (1 << 8)
b40d939b 93#define BGP_INFO_REMOVED (1 << 9)
902212c3 94#define BGP_INFO_COUNTED (1 << 10)
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95#define BGP_INFO_MULTIPATH (1 << 11)
96#define BGP_INFO_MULTIPATH_CHG (1 << 12)
718e3744 97
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98 /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
99 u_char type;
100
101 /* When above type is BGP. This sub type specify BGP sub type
102 information. */
103 u_char 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
7c8ff89e
DS
108
109 u_short instance;
110
718e3744 111};
112
113/* BGP static route configuration. */
114struct bgp_static
115{
116 /* Backdoor configuration. */
117 int backdoor;
118
119 /* Import check status. */
120 u_char valid;
121
122 /* IGP metric. */
123 u_int32_t igpmetric;
124
125 /* IGP nexthop. */
126 struct in_addr igpnexthop;
127
41367172
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128 /* Atomic set reference count (ie cause of pathlimit) */
129 u_int32_t atomic;
130
718e3744 131 /* BGP redistribute route-map. */
132 struct
133 {
134 char *name;
135 struct route_map *map;
136 } rmap;
137
138 /* MPLS label. */
139 u_char tag[3];
140};
141
80e0ad24
DS
142#define BGP_INFO_COUNTABLE(BI) \
143 (! CHECK_FLAG ((BI)->flags, BGP_INFO_HISTORY) \
144 && ! CHECK_FLAG ((BI)->flags, BGP_INFO_REMOVED))
145
1a392d46
PJ
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.
152 */
153#define BGP_INFO_HOLDDOWN(BI) \
154 (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID) \
155 || CHECK_FLAG ((BI)->flags, BGP_INFO_UNUSEABLE))
156
718e3744 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)
161
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)
166
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)
171
fee0f4c6 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)
176
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)
718e3744 181
182#define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
183#define UNSUPPRESS_MAP(F) ((F)->usmap.map)
184
228da428
CC
185enum bgp_clear_route_type
186{
187 BGP_CLEAR_ROUTE_NORMAL,
188 BGP_CLEAR_ROUTE_MY_RSCLIENT
189};
190
4092b06c
DS
191enum bgp_path_type
192{
193 BGP_PATH_ALL,
194 BGP_PATH_BESTPATH,
195 BGP_PATH_MULTIPATH
196};
197
718e3744 198/* Prototypes. */
f188f2c4 199extern void bgp_process_queue_init (void);
94f2b392 200extern void bgp_route_init (void);
228da428 201extern void bgp_route_finish (void);
94f2b392 202extern void bgp_cleanup_routes (void);
203extern void bgp_announce_route (struct peer *, afi_t, safi_t);
204extern void bgp_announce_route_all (struct peer *);
205extern void bgp_default_originate (struct peer *, afi_t, safi_t, int);
206extern void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
207extern void bgp_soft_reconfig_rsclient (struct peer *, afi_t, safi_t);
208extern void bgp_check_local_routes_rsclient (struct peer *rsclient, afi_t afi, safi_t safi);
228da428
CC
209extern void bgp_clear_route (struct peer *, afi_t, safi_t,
210 enum bgp_clear_route_type);
94f2b392 211extern void bgp_clear_route_all (struct peer *);
212extern void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
213extern void bgp_clear_stale_route (struct peer *, afi_t, safi_t);
718e3744 214
200df115 215extern struct bgp_info *bgp_info_lock (struct bgp_info *);
216extern struct bgp_info *bgp_info_unlock (struct bgp_info *);
217extern void bgp_info_add (struct bgp_node *rn, struct bgp_info *ri);
218extern void bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri);
fb982c25 219extern struct bgp_info_extra *bgp_info_extra_get (struct bgp_info *);
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PJ
220extern void bgp_info_set_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
221extern void bgp_info_unset_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
200df115 222
d889623f 223extern int bgp_nlri_sanity_check (struct peer *, int, u_char *, bgp_size_t, int *);
94f2b392 224extern int bgp_nlri_parse (struct peer *, struct attr *, struct bgp_nlri *);
718e3744 225
94f2b392 226extern int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
718e3744 227
f04a80a5 228extern void bgp_redistribute_add (struct prefix *, const struct in_addr *,
bc413143 229 const struct in6_addr *, unsigned int ifindex,
7c8ff89e
DS
230 u_int32_t, u_char, u_short, u_short);
231extern void bgp_redistribute_delete (struct prefix *, u_char, u_short);
232extern void bgp_redistribute_withdraw (struct bgp *, afi_t, int, u_short);
718e3744 233
94f2b392 234extern void bgp_static_delete (struct bgp *);
235extern void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
718e3744 236 afi_t, safi_t);
94f2b392 237extern void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
718e3744 238
94f2b392 239extern int bgp_static_set_vpnv4 (struct vty *vty, const char *,
fd79ac91 240 const char *, const char *);
718e3744 241
94f2b392 242extern int bgp_static_unset_vpnv4 (struct vty *, const char *,
fd79ac91 243 const char *, const char *);
718e3744 244
94f2b392 245/* this is primarily for MPLS-VPN */
246extern int bgp_update (struct peer *, struct prefix *, struct attr *,
247 afi_t, safi_t, int, int, struct prefix_rd *,
248 u_char *, int);
249extern int bgp_withdraw (struct peer *, struct prefix *, struct attr *,
250 afi_t, safi_t, int, int, struct prefix_rd *, u_char *);
718e3744 251
94f2b392 252/* for bgp_nexthop and bgp_damp */
253extern void bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t);
cb1faec9
DS
254
255/*
256 * Add an end-of-initial-update marker to the process queue. This is just a
257 * queue element with NULL bgp node.
258 */
259extern void bgp_add_eoiu_mark (struct bgp *, bgp_table_t);
73ac8160
DS
260extern int bgp_config_write_table_map (struct vty *, struct bgp *, afi_t, safi_t,
261 int *);
94f2b392 262extern int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
263extern int bgp_config_write_distance (struct vty *, struct bgp *);
264
265extern void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
718e3744 266 afi_t, safi_t);
94f2b392 267extern void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
718e3744 268 afi_t, safi_t);
269
94f2b392 270extern u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
718e3744 271
94f2b392 272extern afi_t bgp_node_afi (struct vty *);
273extern safi_t bgp_node_safi (struct vty *);
5a646650 274
47fc97cc 275extern void route_vty_out (struct vty *, struct prefix *, struct bgp_info *, int, safi_t, char *);
94f2b392 276extern void route_vty_out_tag (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
47fc97cc 277extern void route_vty_out_tmp (struct vty *, struct prefix *, struct attr *, safi_t, char *);
00d252cb 278
279#endif /* _QUAGGA_BGP_ROUTE_H */