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1 /* BGP nexthop scan
2 * Copyright (C) 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 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
19 */
20
21 #ifndef _QUAGGA_BGP_NEXTHOP_H
22 #define _QUAGGA_BGP_NEXTHOP_H
23
24 #include "if.h"
25 #include "queue.h"
26 #include "prefix.h"
27
28 #define NEXTHOP_FAMILY(nexthop_len) \
29 (((nexthop_len) == 4 || (nexthop_len) == 12 \
30 ? AF_INET \
31 : ((nexthop_len) == 16 || (nexthop_len) == 24 \
32 || (nexthop_len) == 48 \
33 ? AF_INET6 \
34 : AF_UNSPEC)))
35
36 #define BGP_MP_NEXTHOP_FAMILY NEXTHOP_FAMILY
37
38 /* BGP nexthop cache value structure. */
39 struct bgp_nexthop_cache {
40 /* IGP route's metric. */
41 u_int32_t metric;
42
43 /* Nexthop number and nexthop linked list.*/
44 u_char nexthop_num;
45 struct nexthop *nexthop;
46 time_t last_update;
47 u_int16_t flags;
48
49 #define BGP_NEXTHOP_VALID (1 << 0)
50 #define BGP_NEXTHOP_REGISTERED (1 << 1)
51 #define BGP_NEXTHOP_CONNECTED (1 << 2)
52 #define BGP_NEXTHOP_PEER_NOTIFIED (1 << 3)
53 #define BGP_STATIC_ROUTE (1 << 4)
54 #define BGP_STATIC_ROUTE_EXACT_MATCH (1 << 5)
55
56 u_int16_t change_flags;
57
58 #define BGP_NEXTHOP_CHANGED (1 << 0)
59 #define BGP_NEXTHOP_METRIC_CHANGED (1 << 1)
60 #define BGP_NEXTHOP_CONNECTED_CHANGED (1 << 2)
61
62 struct bgp_node *node;
63 void *nht_info; /* In BGP, peer session */
64 LIST_HEAD(path_list, bgp_info) paths;
65 unsigned int path_count;
66 struct bgp *bgp;
67 };
68
69 /* BGP own address structure */
70 struct bgp_addr {
71 struct in_addr addr;
72 int refcnt;
73 };
74
75 /* Own tunnel-ip address structure */
76 struct tip_addr {
77 struct in_addr addr;
78 int refcnt;
79 };
80
81 extern int bgp_nexthop_lookup(afi_t, struct peer *peer, struct bgp_info *,
82 int *, int *);
83 extern void bgp_connected_add(struct bgp *bgp, struct connected *c);
84 extern void bgp_connected_delete(struct bgp *bgp, struct connected *c);
85 extern int bgp_subgrp_multiaccess_check_v4(struct in_addr nexthop,
86 struct update_subgroup *subgrp);
87 extern int bgp_multiaccess_check_v4(struct in_addr, struct peer *);
88 extern int bgp_config_write_scan_time(struct vty *);
89 extern int bgp_nexthop_self(struct bgp *, struct in_addr);
90 extern struct bgp_nexthop_cache *bnc_new(void);
91 extern void bnc_free(struct bgp_nexthop_cache *bnc);
92 extern void bnc_nexthop_free(struct bgp_nexthop_cache *bnc);
93 extern char *bnc_str(struct bgp_nexthop_cache *bnc, char *buf, int size);
94 extern void bgp_scan_init(struct bgp *bgp);
95 extern void bgp_scan_finish(struct bgp *bgp);
96 extern void bgp_scan_vty_init(void);
97 extern void bgp_address_init(struct bgp *bgp);
98 extern void bgp_address_destroy(struct bgp *bgp);
99 extern void bgp_tip_add(struct bgp *bgp, struct in_addr *tip);
100 extern void bgp_tip_del(struct bgp *bgp, struct in_addr *tip);
101 extern void bgp_tip_hash_init(struct bgp *bgp);
102 extern void bgp_tip_hash_destroy(struct bgp *bgp);
103
104 #endif /* _QUAGGA_BGP_NEXTHOP_H */