Annotation of embedaddon/quagga/bgpd/bgp_route.h, revision 1.1.1.1
1.1 misho 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: /* Uptime. */
61: time_t uptime;
62:
63: /* reference count */
64: int lock;
65:
66: /* BGP information status. */
67: u_int16_t flags;
68: #define BGP_INFO_IGP_CHANGED (1 << 0)
69: #define BGP_INFO_DAMPED (1 << 1)
70: #define BGP_INFO_HISTORY (1 << 2)
71: #define BGP_INFO_SELECTED (1 << 3)
72: #define BGP_INFO_VALID (1 << 4)
73: #define BGP_INFO_ATTR_CHANGED (1 << 5)
74: #define BGP_INFO_DMED_CHECK (1 << 6)
75: #define BGP_INFO_DMED_SELECTED (1 << 7)
76: #define BGP_INFO_STALE (1 << 8)
77: #define BGP_INFO_REMOVED (1 << 9)
78: #define BGP_INFO_COUNTED (1 << 10)
79:
80: /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
81: u_char type;
82:
83: /* When above type is BGP. This sub type specify BGP sub type
84: information. */
85: u_char sub_type;
86: #define BGP_ROUTE_NORMAL 0
87: #define BGP_ROUTE_STATIC 1
88: #define BGP_ROUTE_AGGREGATE 2
89: #define BGP_ROUTE_REDISTRIBUTE 3
90: };
91:
92: /* BGP static route configuration. */
93: struct bgp_static
94: {
95: /* Backdoor configuration. */
96: int backdoor;
97:
98: /* Import check status. */
99: u_char valid;
100:
101: /* IGP metric. */
102: u_int32_t igpmetric;
103:
104: /* IGP nexthop. */
105: struct in_addr igpnexthop;
106:
107: /* Atomic set reference count (ie cause of pathlimit) */
108: u_int32_t atomic;
109:
110: /* BGP redistribute route-map. */
111: struct
112: {
113: char *name;
114: struct route_map *map;
115: } rmap;
116:
117: /* MPLS label. */
118: u_char tag[3];
119: };
120:
121: /* Flags which indicate a route is unuseable in some form */
122: #define BGP_INFO_UNUSEABLE \
123: (BGP_INFO_HISTORY|BGP_INFO_DAMPED|BGP_INFO_REMOVED)
124: /* Macro to check BGP information is alive or not. Sadly,
125: * not equivalent to just checking previous, because of the
126: * sense of the additional VALID flag.
127: */
128: #define BGP_INFO_HOLDDOWN(BI) \
129: (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID) \
130: || CHECK_FLAG ((BI)->flags, BGP_INFO_UNUSEABLE))
131:
132: #define DISTRIBUTE_IN_NAME(F) ((F)->dlist[FILTER_IN].name)
133: #define DISTRIBUTE_IN(F) ((F)->dlist[FILTER_IN].alist)
134: #define DISTRIBUTE_OUT_NAME(F) ((F)->dlist[FILTER_OUT].name)
135: #define DISTRIBUTE_OUT(F) ((F)->dlist[FILTER_OUT].alist)
136:
137: #define PREFIX_LIST_IN_NAME(F) ((F)->plist[FILTER_IN].name)
138: #define PREFIX_LIST_IN(F) ((F)->plist[FILTER_IN].plist)
139: #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
140: #define PREFIX_LIST_OUT(F) ((F)->plist[FILTER_OUT].plist)
141:
142: #define FILTER_LIST_IN_NAME(F) ((F)->aslist[FILTER_IN].name)
143: #define FILTER_LIST_IN(F) ((F)->aslist[FILTER_IN].aslist)
144: #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
145: #define FILTER_LIST_OUT(F) ((F)->aslist[FILTER_OUT].aslist)
146:
147: #define ROUTE_MAP_IN_NAME(F) ((F)->map[RMAP_IN].name)
148: #define ROUTE_MAP_IN(F) ((F)->map[RMAP_IN].map)
149: #define ROUTE_MAP_OUT_NAME(F) ((F)->map[RMAP_OUT].name)
150: #define ROUTE_MAP_OUT(F) ((F)->map[RMAP_OUT].map)
151:
152: #define ROUTE_MAP_IMPORT_NAME(F) ((F)->map[RMAP_IMPORT].name)
153: #define ROUTE_MAP_IMPORT(F) ((F)->map[RMAP_IMPORT].map)
154: #define ROUTE_MAP_EXPORT_NAME(F) ((F)->map[RMAP_EXPORT].name)
155: #define ROUTE_MAP_EXPORT(F) ((F)->map[RMAP_EXPORT].map)
156:
157: #define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
158: #define UNSUPPRESS_MAP(F) ((F)->usmap.map)
159:
160: enum bgp_clear_route_type
161: {
162: BGP_CLEAR_ROUTE_NORMAL,
163: BGP_CLEAR_ROUTE_MY_RSCLIENT
164: };
165:
166: /* Prototypes. */
167: extern void bgp_route_init (void);
168: extern void bgp_route_finish (void);
169: extern void bgp_cleanup_routes (void);
170: extern void bgp_announce_route (struct peer *, afi_t, safi_t);
171: extern void bgp_announce_route_all (struct peer *);
172: extern void bgp_default_originate (struct peer *, afi_t, safi_t, int);
173: extern void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
174: extern void bgp_soft_reconfig_rsclient (struct peer *, afi_t, safi_t);
175: extern void bgp_check_local_routes_rsclient (struct peer *rsclient, afi_t afi, safi_t safi);
176: extern void bgp_clear_route (struct peer *, afi_t, safi_t,
177: enum bgp_clear_route_type);
178: extern void bgp_clear_route_all (struct peer *);
179: extern void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
180: extern void bgp_clear_stale_route (struct peer *, afi_t, safi_t);
181:
182: extern struct bgp_info *bgp_info_lock (struct bgp_info *);
183: extern struct bgp_info *bgp_info_unlock (struct bgp_info *);
184: extern void bgp_info_add (struct bgp_node *rn, struct bgp_info *ri);
185: extern void bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri);
186: extern struct bgp_info_extra *bgp_info_extra_get (struct bgp_info *);
187: extern void bgp_info_set_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
188: extern void bgp_info_unset_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
189:
190: extern int bgp_nlri_sanity_check (struct peer *, int, u_char *, bgp_size_t);
191: extern int bgp_nlri_parse (struct peer *, struct attr *, struct bgp_nlri *);
192:
193: extern int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
194:
195: extern void bgp_redistribute_add (struct prefix *, struct in_addr *, u_int32_t, u_char);
196: extern void bgp_redistribute_delete (struct prefix *, u_char);
197: extern void bgp_redistribute_withdraw (struct bgp *, afi_t, int);
198:
199: extern void bgp_static_delete (struct bgp *);
200: extern void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
201: afi_t, safi_t);
202: extern void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
203:
204: extern int bgp_static_set_vpnv4 (struct vty *vty, const char *,
205: const char *, const char *);
206:
207: extern int bgp_static_unset_vpnv4 (struct vty *, const char *,
208: const char *, const char *);
209:
210: /* this is primarily for MPLS-VPN */
211: extern int bgp_update (struct peer *, struct prefix *, struct attr *,
212: afi_t, safi_t, int, int, struct prefix_rd *,
213: u_char *, int);
214: extern int bgp_withdraw (struct peer *, struct prefix *, struct attr *,
215: afi_t, safi_t, int, int, struct prefix_rd *, u_char *);
216:
217: /* for bgp_nexthop and bgp_damp */
218: extern void bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t);
219: extern int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
220: extern int bgp_config_write_distance (struct vty *, struct bgp *);
221:
222: extern void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
223: afi_t, safi_t);
224: extern void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
225: afi_t, safi_t);
226:
227: extern u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
228:
229: extern afi_t bgp_node_afi (struct vty *);
230: extern safi_t bgp_node_safi (struct vty *);
231:
232: extern void route_vty_out (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
233: extern void route_vty_out_tag (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
234: extern void route_vty_out_tmp (struct vty *, struct prefix *, struct attr *, safi_t);
235:
236: #endif /* _QUAGGA_BGP_ROUTE_H */
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