projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0b873931 | 1 | /* Copyright (C) 2006-2013 B.A.T.M.A.N. contributors: |
| c6c8fea2 SE |
2 | * |
| 3 | * Simon Wunderlich, Marek Lindner | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of version 2 of the GNU General Public | |
| 7 | * License as published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, but | |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | * General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program; if not, write to the Free Software | |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
| 17 | * 02110-1301, USA | |
| c6c8fea2 SE |
18 | */ |
| 19 | ||
| 20 | #ifndef _NET_BATMAN_ADV_BITARRAY_H_ | |
| 21 | #define _NET_BATMAN_ADV_BITARRAY_H_ | |
| 22 | ||
| dbd6b11e LL |
23 | /* Returns 1 if the corresponding bit in the given seq_bits indicates true |
| 24 | * and curr_seqno is within range of last_seqno. Otherwise returns 0. | |
| 9cfc7bd6 | 25 | */ |
| 9b4a1159 SE |
26 | static inline int batadv_test_bit(const unsigned long *seq_bits, |
| 27 | uint32_t last_seqno, uint32_t curr_seqno) | |
| 0079d2ce SE |
28 | { |
| 29 | int32_t diff; | |
| 30 | ||
| 31 | diff = last_seqno - curr_seqno; | |
| 42d0b044 | 32 | if (diff < 0 || diff >= BATADV_TQ_LOCAL_WINDOW_SIZE) |
| 0079d2ce SE |
33 | return 0; |
| 34 | else | |
| dbd6b11e | 35 | return test_bit(diff, seq_bits) != 0; |
| 0079d2ce | 36 | } |
| c6c8fea2 SE |
37 | |
| 38 | /* turn corresponding bit on, so we can remember that we got the packet */ | |
| 9b4a1159 | 39 | static inline void batadv_set_bit(unsigned long *seq_bits, int32_t n) |
| 0079d2ce SE |
40 | { |
| 41 | /* if too old, just drop it */ | |
| 42d0b044 | 42 | if (n < 0 || n >= BATADV_TQ_LOCAL_WINDOW_SIZE) |
| 0079d2ce | 43 | return; |
| c6c8fea2 | 44 | |
| 0079d2ce SE |
45 | set_bit(n, seq_bits); /* turn the position on */ |
| 46 | } | |
| c6c8fea2 SE |
47 | |
| 48 | /* receive and process one packet, returns 1 if received seq_num is considered | |
| 9cfc7bd6 SE |
49 | * new, 0 if old |
| 50 | */ | |
| 0f5f9322 SE |
51 | int batadv_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_ */ |