| Andrew Lunn | 5beef3c | 2009-11-09 21:20:10 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006-2009 B.A.T.M.A.N. contributors: |
| 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 | |
| 23 | /* you should choose something big, if you don't want to waste cpu */ |
| 24 | #define TYPE_OF_WORD unsigned long |
| 25 | #define WORD_BIT_SIZE (sizeof(TYPE_OF_WORD) * 8) |
| 26 | |
| 27 | /* returns true if the corresponding bit in the given seq_bits indicates true |
| 28 | * and curr_seqno is within range of last_seqno */ |
| 29 | uint8_t get_bit_status(TYPE_OF_WORD *seq_bits, uint16_t last_seqno, |
| 30 | uint16_t curr_seqno); |
| 31 | |
| 32 | /* turn corresponding bit on, so we can remember that we got the packet */ |
| 33 | void bit_mark(TYPE_OF_WORD *seq_bits, int32_t n); |
| 34 | |
| 35 | /* shift the packet array by n places. */ |
| 36 | void bit_shift(TYPE_OF_WORD *seq_bits, int32_t n); |
| 37 | |
| 38 | |
| 39 | /* receive and process one packet, returns 1 if received seq_num is considered |
| 40 | * new, 0 if old */ |
| 41 | char bit_get_packet(TYPE_OF_WORD *seq_bits, int16_t seq_num_diff, |
| 42 | int8_t set_mark); |
| 43 | |
| 44 | /* count the hamming weight, how many good packets did we receive? */ |
| 45 | int bit_packet_count(TYPE_OF_WORD *seq_bits); |