| /* |
| * Copyright (C) 2006-2009 B.A.T.M.A.N. contributors: |
| * |
| * Simon Wunderlich, Marek Lindner |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA |
| * |
| */ |
| |
| |
| /* you should choose something big, if you don't want to waste cpu */ |
| #define TYPE_OF_WORD unsigned long |
| #define WORD_BIT_SIZE (sizeof(TYPE_OF_WORD) * 8) |
| |
| /* returns true if the corresponding bit in the given seq_bits indicates true |
| * and curr_seqno is within range of last_seqno */ |
| uint8_t get_bit_status(TYPE_OF_WORD *seq_bits, uint16_t last_seqno, |
| uint16_t curr_seqno); |
| |
| /* turn corresponding bit on, so we can remember that we got the packet */ |
| void bit_mark(TYPE_OF_WORD *seq_bits, int32_t n); |
| |
| /* shift the packet array by n places. */ |
| void bit_shift(TYPE_OF_WORD *seq_bits, int32_t n); |
| |
| |
| /* receive and process one packet, returns 1 if received seq_num is considered |
| * new, 0 if old */ |
| char bit_get_packet(TYPE_OF_WORD *seq_bits, int16_t seq_num_diff, |
| int8_t set_mark); |
| |
| /* count the hamming weight, how many good packets did we receive? */ |
| int bit_packet_count(TYPE_OF_WORD *seq_bits); |
