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1 /* BGP Nexthop tracking
2 * Copyright (C) 2013 Cumulus Networks, Inc.
4 * This file is part of GNU Zebra.
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
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.
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
25 * bgp_parse_nexthop_update() - parse a nexthop update message from Zebra.
27 extern void bgp_parse_nexthop_update(int command
, vrf_id_t vrf_id
);
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.
34 * bgp_route - BGP instance of route
35 * bgp_nexthop - BGP instance of nexthop
36 * a - afi: AFI_IP or AF_IP6
37 * p - path for which the nexthop object is being looked up
38 * peer - The BGP peer associated with this NHT
39 * connected - True if NH MUST be a connected route
41 extern int bgp_find_or_add_nexthop(struct bgp
*bgp_route
,
42 struct bgp
*bgp_nexthop
, afi_t a
,
43 struct bgp_path_info
*p
, struct peer
*peer
,
47 * bgp_unlink_nexthop() - Unlink the nexthop object from the path structure.
51 extern void bgp_unlink_nexthop(struct bgp_path_info
*p
);
52 void bgp_unlink_nexthop_by_peer(struct peer
*peer
);
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
59 * afi - afi: AFI_IP or AF_IP6
62 extern void bgp_delete_connected_nexthop(afi_t afi
, struct peer
*peer
);
65 * Cleanup nexthop registration and status information for BGP nexthops
66 * pertaining to this VRF. This is invoked upon VRF deletion.
68 extern void bgp_cleanup_nexthops(struct bgp
*bgp
);
71 * Add or remove the tracking of the bgp_path_info that
74 extern void path_nh_map(struct bgp_path_info
*path
,
75 struct bgp_nexthop_cache
*bnc
, bool make
);
77 * When we actually have the connection to
78 * the zebra daemon, we need to reregister
79 * any nexthops we may have sitting around
81 extern void bgp_nht_register_nexthops(struct bgp
*bgp
);
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.
90 extern void bgp_nht_reg_enhe_cap_intfs(struct peer
*peer
);
91 extern void bgp_nht_dereg_enhe_cap_intfs(struct peer
*peer
);
93 /* APIs for setting up and allocating L3 nexthop group ids */
94 extern uint32_t bgp_l3nhg_id_alloc(void);
95 extern void bgp_l3nhg_id_free(uint32_t nhg_id
);
96 extern void bgp_l3nhg_init(void);
97 void bgp_l3nhg_finish(void);
99 #endif /* _BGP_NHT_H */