From 3f2546b2ef55b661fd8dd69682b38992225e86f6 Mon Sep 17 00:00:00 2001 From: fishsoupisgood Date: Mon, 29 Apr 2019 01:17:54 +0100 Subject: Initial import of qemu-2.4.1 --- include/net/checksum.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 include/net/checksum.h (limited to 'include/net/checksum.h') diff --git a/include/net/checksum.h b/include/net/checksum.h new file mode 100644 index 00000000..2d7a363d --- /dev/null +++ b/include/net/checksum.h @@ -0,0 +1,54 @@ +/* + * IP checksumming functions. + * (c) 2008 Gerd Hoffmann + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; under version 2 of the License. + * + * 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, see . + */ + +#ifndef QEMU_NET_CHECKSUM_H +#define QEMU_NET_CHECKSUM_H + +#include +struct iovec; + +uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq); +uint16_t net_checksum_finish(uint32_t sum); +uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto, + uint8_t *addrs, uint8_t *buf); +void net_checksum_calculate(uint8_t *data, int length); + +static inline uint32_t +net_checksum_add(int len, uint8_t *buf) +{ + return net_checksum_add_cont(len, buf, 0); +} + +static inline uint16_t +net_raw_checksum(uint8_t *data, int length) +{ + return net_checksum_finish(net_checksum_add(length, data)); +} + +/** + * net_checksum_add_iov: scatter-gather vector checksumming + * + * @iov: input scatter-gather array + * @iov_cnt: number of array elements + * @iov_off: starting iov offset for checksumming + * @size: length of data to be checksummed + */ +uint32_t net_checksum_add_iov(const struct iovec *iov, + const unsigned int iov_cnt, + uint32_t iov_off, uint32_t size); + +#endif /* QEMU_NET_CHECKSUM_H */ -- cgit v1.2.3