diff options
Diffstat (limited to 'net/batman-adv/bitarray.h')
| -rw-r--r-- | net/batman-adv/bitarray.h | 62 |
1 files changed, 32 insertions, 30 deletions
diff --git a/net/batman-adv/bitarray.h b/net/batman-adv/bitarray.h index a81b9322e382..37f7ae413bc6 100644 --- a/net/batman-adv/bitarray.h +++ b/net/batman-adv/bitarray.h @@ -1,42 +1,47 @@ -/* Copyright (C) 2006-2013 B.A.T.M.A.N. contributors: +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 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 */ #ifndef _NET_BATMAN_ADV_BITARRAY_H_ #define _NET_BATMAN_ADV_BITARRAY_H_ -/* Returns 1 if the corresponding bit in the given seq_bits indicates true - * and curr_seqno is within range of last_seqno. Otherwise returns 0. +#include "main.h" + +#include <linux/bitops.h> +#include <linux/compiler.h> +#include <linux/stddef.h> +#include <linux/types.h> + +/** + * batadv_test_bit() - check if bit is set in the current window + * + * @seq_bits: pointer to the sequence number receive packet + * @last_seqno: latest sequence number in seq_bits + * @curr_seqno: sequence number to test for + * + * Return: true if the corresponding bit in the given seq_bits indicates true + * and curr_seqno is within range of last_seqno. Otherwise returns false. */ -static inline int batadv_test_bit(const unsigned long *seq_bits, - uint32_t last_seqno, uint32_t curr_seqno) +static inline bool batadv_test_bit(const unsigned long *seq_bits, + u32 last_seqno, u32 curr_seqno) { - int32_t diff; + s32 diff; diff = last_seqno - curr_seqno; if (diff < 0 || diff >= BATADV_TQ_LOCAL_WINDOW_SIZE) - return 0; - else - return test_bit(diff, seq_bits) != 0; + return false; + return test_bit(diff, seq_bits) != 0; } -/* turn corresponding bit on, so we can remember that we got the packet */ -static inline void batadv_set_bit(unsigned long *seq_bits, int32_t n) +/** + * batadv_set_bit() - Turn corresponding bit on, so we can remember that we got + * the packet + * @seq_bits: bitmap of the packet receive window + * @n: relative sequence number of newly received packet + */ +static inline void batadv_set_bit(unsigned long *seq_bits, s32 n) { /* if too old, just drop it */ if (n < 0 || n >= BATADV_TQ_LOCAL_WINDOW_SIZE) @@ -45,10 +50,7 @@ static inline void batadv_set_bit(unsigned long *seq_bits, int32_t n) set_bit(n, seq_bits); /* turn the position on */ } -/* receive and process one packet, returns 1 if received seq_num is considered - * new, 0 if old - */ -int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, - int32_t seq_num_diff, int set_mark); +bool batadv_bit_get_packet(void *priv, unsigned long *seq_bits, + s32 seq_num_diff, int set_mark); #endif /* _NET_BATMAN_ADV_BITARRAY_H_ */ |