1: /* BGP routing information base
2: Copyright (C) 1996, 97, 98, 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
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
19: 02111-1307, USA. */
20:
21: #ifndef _QUAGGA_BGP_ROUTE_H
22: #define _QUAGGA_BGP_ROUTE_H
23:
24: #include "bgp_table.h"
25:
26: /* Ancillary information to struct bgp_info,
27: * used for uncommonly used data (aggregation, MPLS, etc.)
28: * and lazily allocated to save memory.
29: */
30: struct bgp_info_extra
31: {
32: /* Pointer to dampening structure. */
33: struct bgp_damp_info *damp_info;
34:
35: /* This route is suppressed with aggregation. */
36: int suppress;
37:
38: /* Nexthop reachability check. */
39: u_int32_t igpmetric;
40:
41: /* MPLS label. */
42: u_char tag[3];
43: };
44:
45: struct bgp_info
46: {
47: /* For linked list. */
48: struct bgp_info *next;
49: struct bgp_info *prev;
50:
51: /* Peer structure. */
52: struct peer *peer;
53:
54: /* Attribute structure. */
55: struct attr *attr;
56:
57: /* Extra information */
58: struct bgp_info_extra *extra;
59:
60:
61: /* Multipath information */
62: struct bgp_info_mpath *mpath;
63:
64: /* Uptime. */
65: time_t uptime;
66:
67: /* reference count */
68: int lock;
69:
70: /* BGP information status. */
71: u_int16_t flags;
72: #define BGP_INFO_IGP_CHANGED (1 << 0)
73: #define BGP_INFO_DAMPED (1 << 1)
74: #define BGP_INFO_HISTORY (1 << 2)
75: #define BGP_INFO_SELECTED (1 << 3)
76: #define BGP_INFO_VALID (1 << 4)
77: #define BGP_INFO_ATTR_CHANGED (1 << 5)
78: #define BGP_INFO_DMED_CHECK (1 << 6)
79: #define BGP_INFO_DMED_SELECTED (1 << 7)
80: #define BGP_INFO_STALE (1 << 8)
81: #define BGP_INFO_REMOVED (1 << 9)
82: #define BGP_INFO_COUNTED (1 << 10)
83: #define BGP_INFO_MULTIPATH (1 << 11)
84: #define BGP_INFO_MULTIPATH_CHG (1 << 12)
85:
86: /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
87: u_char type;
88:
89: /* When above type is BGP. This sub type specify BGP sub type
90: information. */
91: u_char sub_type;
92: #define BGP_ROUTE_NORMAL 0
93: #define BGP_ROUTE_STATIC 1
94: #define BGP_ROUTE_AGGREGATE 2
95: #define BGP_ROUTE_REDISTRIBUTE 3
96: };
97:
98: /* BGP static route configuration. */
99: struct bgp_static
100: {
101: /* Backdoor configuration. */
102: int backdoor;
103:
104: /* Import check status. */
105: u_char valid;
106:
107: /* IGP metric. */
108: u_int32_t igpmetric;
109:
110: /* IGP nexthop. */
111: struct in_addr igpnexthop;
112:
113: /* Atomic set reference count (ie cause of pathlimit) */
114: u_int32_t atomic;
115:
116: /* BGP redistribute route-map. */
117: struct
118: {
119: char *name;
120: struct route_map *map;
121: } rmap;
122:
123: /* Route Distinguisher */
124: struct prefix_rd prd;
125:
126: /* MPLS label. */
127: u_char tag[3];
128: };
129:
130: /* Flags which indicate a route is unuseable in some form */
131: #define BGP_INFO_UNUSEABLE \
132: (BGP_INFO_HISTORY|BGP_INFO_DAMPED|BGP_INFO_REMOVED)
133: /* Macro to check BGP information is alive or not. Sadly,
134: * not equivalent to just checking previous, because of the
135: * sense of the additional VALID flag.
136: */
137: #define BGP_INFO_HOLDDOWN(BI) \
138: (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID) \
139: || CHECK_FLAG ((BI)->flags, BGP_INFO_UNUSEABLE))
140:
141: #define DISTRIBUTE_IN_NAME(F) ((F)->dlist[FILTER_IN].name)
142: #define DISTRIBUTE_IN(F) ((F)->dlist[FILTER_IN].alist)
143: #define DISTRIBUTE_OUT_NAME(F) ((F)->dlist[FILTER_OUT].name)
144: #define DISTRIBUTE_OUT(F) ((F)->dlist[FILTER_OUT].alist)
145:
146: #define PREFIX_LIST_IN_NAME(F) ((F)->plist[FILTER_IN].name)
147: #define PREFIX_LIST_IN(F) ((F)->plist[FILTER_IN].plist)
148: #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
149: #define PREFIX_LIST_OUT(F) ((F)->plist[FILTER_OUT].plist)
150:
151: #define FILTER_LIST_IN_NAME(F) ((F)->aslist[FILTER_IN].name)
152: #define FILTER_LIST_IN(F) ((F)->aslist[FILTER_IN].aslist)
153: #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
154: #define FILTER_LIST_OUT(F) ((F)->aslist[FILTER_OUT].aslist)
155:
156: #define ROUTE_MAP_IN_NAME(F) ((F)->map[RMAP_IN].name)
157: #define ROUTE_MAP_IN(F) ((F)->map[RMAP_IN].map)
158: #define ROUTE_MAP_OUT_NAME(F) ((F)->map[RMAP_OUT].name)
159: #define ROUTE_MAP_OUT(F) ((F)->map[RMAP_OUT].map)
160:
161: #define ROUTE_MAP_IMPORT_NAME(F) ((F)->map[RMAP_IMPORT].name)
162: #define ROUTE_MAP_IMPORT(F) ((F)->map[RMAP_IMPORT].map)
163: #define ROUTE_MAP_EXPORT_NAME(F) ((F)->map[RMAP_EXPORT].name)
164: #define ROUTE_MAP_EXPORT(F) ((F)->map[RMAP_EXPORT].map)
165:
166: #define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
167: #define UNSUPPRESS_MAP(F) ((F)->usmap.map)
168:
169: enum bgp_clear_route_type
170: {
171: BGP_CLEAR_ROUTE_NORMAL,
172: BGP_CLEAR_ROUTE_MY_RSCLIENT
173: };
174:
175: /* Prototypes. */
176: extern void bgp_route_init (void);
177: extern void bgp_route_finish (void);
178: extern void bgp_cleanup_routes (void);
179: extern void bgp_announce_route (struct peer *, afi_t, safi_t);
180: extern void bgp_announce_route_all (struct peer *);
181: extern void bgp_default_originate (struct peer *, afi_t, safi_t, int);
182: extern void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
183: extern void bgp_soft_reconfig_rsclient (struct peer *, afi_t, safi_t);
184: extern void bgp_check_local_routes_rsclient (struct peer *rsclient, afi_t afi, safi_t safi);
185: extern void bgp_clear_route (struct peer *, afi_t, safi_t,
186: enum bgp_clear_route_type);
187: extern void bgp_clear_route_all (struct peer *);
188: extern void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
189: extern void bgp_clear_stale_route (struct peer *, afi_t, safi_t);
190:
191: extern struct bgp_info *bgp_info_lock (struct bgp_info *);
192: extern struct bgp_info *bgp_info_unlock (struct bgp_info *);
193: extern void bgp_info_add (struct bgp_node *rn, struct bgp_info *ri);
194: extern void bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri);
195: extern struct bgp_info_extra *bgp_info_extra_get (struct bgp_info *);
196: extern void bgp_info_set_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
197: extern void bgp_info_unset_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
198:
199: extern int bgp_nlri_parse_ip (struct peer *, struct attr *, struct bgp_nlri *);
200:
201: extern int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
202:
203: extern void bgp_redistribute_add (struct prefix *, const struct in_addr *,
204: const struct in6_addr *,
205: u_int32_t, u_char);
206: extern void bgp_redistribute_delete (struct prefix *, u_char);
207: extern void bgp_redistribute_withdraw (struct bgp *, afi_t, int);
208:
209: extern void bgp_static_delete (struct bgp *);
210: extern void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
211: afi_t, safi_t);
212: extern void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
213:
214: extern int bgp_static_set_safi (safi_t safi, struct vty *vty, const char *,
215: const char *, const char *, const char *);
216:
217: extern int bgp_static_unset_safi (safi_t safi, struct vty *, const char *,
218: const char *, const char *);
219:
220: /* this is primarily for MPLS-VPN */
221: extern int bgp_update (struct peer *, struct prefix *, struct attr *,
222: afi_t, safi_t, int, int, struct prefix_rd *,
223: u_char *, int);
224: extern int bgp_withdraw (struct peer *, struct prefix *, struct attr *,
225: afi_t, safi_t, int, int, struct prefix_rd *, u_char *);
226:
227: /* for bgp_nexthop and bgp_damp */
228: extern void bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t);
229: extern int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
230: extern int bgp_config_write_distance (struct vty *, struct bgp *);
231:
232: extern void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
233: afi_t, safi_t);
234: extern void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
235: afi_t, safi_t);
236:
237: extern u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
238:
239: extern afi_t bgp_node_afi (struct vty *);
240: extern safi_t bgp_node_safi (struct vty *);
241:
242: extern void route_vty_out (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
243: extern void route_vty_out_tag (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
244: extern void route_vty_out_tmp (struct vty *, struct prefix *, struct attr *, safi_t);
245:
246: extern void bgp_peer_clear_node_queue_drain_immediate (struct peer *peer);
247: extern void bgp_process_queues_drain_immediate (void);
248:
249: #endif /* _QUAGGA_BGP_ROUTE_H */
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