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1 | /* |
2 | Copyright (c) 2007, 2008 by Juliusz Chroboczek | |
3 | ||
4 | Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | of this software and associated documentation files (the "Software"), to deal | |
6 | in the Software without restriction, including without limitation the rights | |
7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | copies of the Software, and to permit persons to whom the Software is | |
9 | furnished to do so, subject to the following conditions: | |
10 | ||
11 | The above copyright notice and this permission notice shall be included in | |
12 | all copies or substantial portions of the Software. | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
20 | THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #ifndef BABEL_NEIGHBOUR_H | |
24 | #define BABEL_NEIGHBOUR_H | |
25 | ||
26 | struct neighbour { | |
27 | struct neighbour *next; | |
28 | /* This is -1 when unknown, so don't make it unsigned */ | |
29 | int hello_seqno; | |
30 | unsigned char address[16]; | |
31 | unsigned short reach; | |
32 | unsigned short txcost; | |
33 | struct timeval hello_time; | |
34 | struct timeval ihu_time; | |
35 | unsigned short hello_interval; /* in centiseconds */ | |
36 | unsigned short ihu_interval; /* in centiseconds */ | |
37 | /* Used for RTT estimation. */ | |
38 | /* Absolute time (modulo 2^32) at which the Hello was sent, | |
39 | according to remote clock. */ | |
40 | unsigned int hello_send_us; | |
41 | struct timeval hello_rtt_receive_time; | |
42 | unsigned int rtt; | |
43 | struct timeval rtt_time; | |
44 | struct interface *ifp; | |
45 | }; | |
46 | ||
47 | extern struct neighbour *neighs; | |
48 | ||
49 | #define FOR_ALL_NEIGHBOURS(_neigh) \ | |
50 | for(_neigh = neighs; _neigh; _neigh = _neigh->next) | |
51 | ||
52 | int neighbour_valid(struct neighbour *neigh); | |
53 | void flush_neighbour(struct neighbour *neigh); | |
54 | struct neighbour *find_neighbour(const unsigned char *address, | |
55 | struct interface *ifp); | |
56 | int update_neighbour(struct neighbour *neigh, int hello, int hello_interval); | |
57 | unsigned check_neighbours(void); | |
58 | unsigned neighbour_txcost(struct neighbour *neigh); | |
59 | unsigned neighbour_rxcost(struct neighbour *neigh); | |
60 | unsigned neighbour_rttcost(struct neighbour *neigh); | |
61 | unsigned neighbour_cost(struct neighbour *neigh); | |
62 | int valid_rtt(struct neighbour *neigh); | |
63 | ||
64 | #endif /* BABEL_NEIGHBOUR_H */ |