projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 7200ac3c MM |
1 | /* |
| 2 | * IP checksumming functions. | |
| 3 | * (c) 2008 Gerd Hoffmann <kraxel@redhat.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License as published by | |
| 7 | * the Free Software Foundation; under version 2 of the License. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU 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, see <http://www.gnu.org/licenses/>. | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef QEMU_NET_CHECKSUM_H | |
| 19 | #define QEMU_NET_CHECKSUM_H | |
| 20 | ||
| 21 | #include <stdint.h> | |
| 26247179 | 22 | struct iovec; |
| 7200ac3c | 23 | |
| 5acf5ea4 | 24 | uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq); |
| 7200ac3c MM |
25 | uint16_t net_checksum_finish(uint32_t sum); |
| 26 | uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto, | |
| 27 | uint8_t *addrs, uint8_t *buf); | |
| 28 | void net_checksum_calculate(uint8_t *data, int length); | |
| 29 | ||
| 5acf5ea4 DF |
30 | static inline uint32_t |
| 31 | net_checksum_add(int len, uint8_t *buf) | |
| 32 | { | |
| 33 | return net_checksum_add_cont(len, buf, 0); | |
| 34 | } | |
| 35 | ||
| 36 | static inline uint16_t | |
| 37 | net_raw_checksum(uint8_t *data, int length) | |
| 38 | { | |
| 39 | return net_checksum_finish(net_checksum_add(length, data)); | |
| 40 | } | |
| 41 | ||
| 84026301 DF |
42 | /** |
| 43 | * net_checksum_add_iov: scatter-gather vector checksumming | |
| 44 | * | |
| 45 | * @iov: input scatter-gather array | |
| 46 | * @iov_cnt: number of array elements | |
| 47 | * @iov_off: starting iov offset for checksumming | |
| 48 | * @size: length of data to be checksummed | |
| 49 | */ | |
| 50 | uint32_t net_checksum_add_iov(const struct iovec *iov, | |
| 51 | const unsigned int iov_cnt, | |
| 52 | uint32_t iov_off, uint32_t size); | |
| 53 | ||
| 7200ac3c | 54 | #endif /* QEMU_NET_CHECKSUM_H */ |