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c6c8fea2 | 1 | /* |
567db7b0 | 2 | * Copyright (C) 2006-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Simon Wunderlich, Marek Lindner | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301, USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #ifndef _NET_BATMAN_ADV_BITARRAY_H_ | |
23 | #define _NET_BATMAN_ADV_BITARRAY_H_ | |
24 | ||
c6c8fea2 SE |
25 | /* returns true if the corresponding bit in the given seq_bits indicates true |
26 | * and curr_seqno is within range of last_seqno */ | |
0079d2ce SE |
27 | static inline int bat_test_bit(const unsigned long *seq_bits, |
28 | uint32_t last_seqno, uint32_t curr_seqno) | |
29 | { | |
30 | int32_t diff; | |
31 | ||
32 | diff = last_seqno - curr_seqno; | |
33 | if (diff < 0 || diff >= TQ_LOCAL_WINDOW_SIZE) | |
34 | return 0; | |
35 | else | |
36 | return test_bit(diff, seq_bits); | |
37 | } | |
c6c8fea2 SE |
38 | |
39 | /* turn corresponding bit on, so we can remember that we got the packet */ | |
0079d2ce SE |
40 | static inline void bat_set_bit(unsigned long *seq_bits, int32_t n) |
41 | { | |
42 | /* if too old, just drop it */ | |
43 | if (n < 0 || n >= TQ_LOCAL_WINDOW_SIZE) | |
44 | return; | |
c6c8fea2 | 45 | |
0079d2ce SE |
46 | set_bit(n, seq_bits); /* turn the position on */ |
47 | } | |
c6c8fea2 SE |
48 | |
49 | /* receive and process one packet, returns 1 if received seq_num is considered | |
50 | * new, 0 if old */ | |
b4e17054 SE |
51 | int bit_get_packet(void *priv, unsigned long *seq_bits, |
52 | int32_t seq_num_diff, int set_mark); | |
c6c8fea2 | 53 | |
c6c8fea2 | 54 | #endif /* _NET_BATMAN_ADV_BITARRAY_H_ */ |