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fb018d25 DS |
1 | /* BGP Nexthop tracking |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
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 | * | |
896014f4 DL |
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 | |
fb018d25 DS |
19 | */ |
20 | ||
21 | #ifndef _BGP_NHT_H | |
22 | #define _BGP_NHT_H | |
23 | ||
24 | /** | |
25 | * bgp_parse_nexthop_update() - parse a nexthop update message from Zebra. | |
26 | */ | |
7076bb2f | 27 | extern void bgp_parse_nexthop_update(int command, vrf_id_t vrf_id); |
fb018d25 | 28 | |
fb018d25 DS |
29 | /** |
30 | * bgp_find_or_add_nexthop() - lookup the nexthop cache table for the bnc | |
31 | * object. If not found, create a new object and register with ZEBRA for | |
32 | * nexthop notification. | |
33 | * ARGUMENTS: | |
960035b2 PZ |
34 | * bgp_route - BGP instance of route |
35 | * bgp_nexthop - BGP instance of nexthop | |
fb018d25 DS |
36 | * a - afi: AFI_IP or AF_IP6 |
37 | * p - path for which the nexthop object is being looked up | |
fc9a856f DS |
38 | * peer - The BGP peer associated with this NHT |
39 | * connected - True if NH MUST be a connected route | |
fb018d25 | 40 | */ |
960035b2 | 41 | extern int bgp_find_or_add_nexthop(struct bgp *bgp_route, |
4b7e6066 DS |
42 | struct bgp *bgp_nexthop, afi_t a, |
43 | struct bgp_path_info *p, struct peer *peer, | |
44 | int connected); | |
fb018d25 DS |
45 | |
46 | /** | |
47 | * bgp_unlink_nexthop() - Unlink the nexthop object from the path structure. | |
48 | * ARGUMENTS: | |
49 | * p - path structure. | |
50 | */ | |
4b7e6066 DS |
51 | extern void bgp_unlink_nexthop(struct bgp_path_info *p); |
52 | void bgp_unlink_nexthop_by_peer(struct peer *peer); | |
fb018d25 | 53 | |
9a233a02 DS |
54 | /** |
55 | * bgp_delete_connected_nexthop() - Reset the 'peer' pointer for a connected | |
56 | * nexthop entry. If no paths reference the nexthop, it will be unregistered | |
57 | * and freed. | |
58 | * ARGUMENTS: | |
59 | * afi - afi: AFI_IP or AF_IP6 | |
60 | * peer - Ptr to peer | |
61 | */ | |
d62a17ae | 62 | extern void bgp_delete_connected_nexthop(afi_t afi, struct peer *peer); |
9a233a02 | 63 | |
ee7ca6c0 | 64 | /* |
65 | * Cleanup nexthop registration and status information for BGP nexthops | |
66 | * pertaining to this VRF. This is invoked upon VRF deletion. | |
67 | */ | |
68 | extern void bgp_cleanup_nexthops(struct bgp *bgp); | |
69 | ||
7f040da1 DS |
70 | /* |
71 | * Add or remove the tracking of the bgp_path_info that | |
72 | * uses this nexthop | |
73 | */ | |
74 | extern void path_nh_map(struct bgp_path_info *path, | |
75 | struct bgp_nexthop_cache *bnc, bool make); | |
1ee0a2df DS |
76 | /* |
77 | * When we actually have the connection to | |
78 | * the zebra daemon, we need to reregister | |
79 | * any nexthops we may have sitting around | |
80 | */ | |
81 | extern void bgp_nht_register_nexthops(struct bgp *bgp); | |
7f040da1 | 82 | |
1ea03b90 DS |
83 | /* |
84 | * When we have the the PEER_FLAG_CAPABILITY_ENHE flag | |
85 | * set on a peer *after* it has been brought up we need | |
86 | * to notice and setup the interface based RA, | |
87 | * this code can walk the registered nexthops and | |
88 | * register the important ones with zebra for RA. | |
89 | */ | |
90 | extern void bgp_nht_register_enhe_capability_interfaces(struct peer *peer); | |
91 | ||
fb018d25 | 92 | #endif /* _BGP_NHT_H */ |