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/* SPDX-License-Identifier: GPL-2.0-or-later */ /* SCTP kernel reference Implementation * Copyright (c) 1999-2001 Motorola, Inc. * Copyright (c) 2001-2003 International Business Machines, Corp. * * This file is part of the SCTP kernel reference Implementation * * SCTP Checksum functions * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers * * Written or modified by: * Dinakaran Joseph * Jon Grimm * Sridhar Samudrala * * Rewritten to use libcrc32c by: * Vlad Yasevich */ #ifndef __sctp_checksum_h__ #define __sctp_checksum_h__ #include #include #include #include static inline __wsum sctp_csum_update(const void *buff, int len, __wsum sum) { /* This uses the crypto implementation of crc32c, which is either * implemented w/ hardware support or resolves to __crc32c_le(). */ return (__force __wsum)crc32c((__force __u32)sum, buff, len); } static inline __wsum sctp_csum_combine(__wsum csum, __wsum csum2, int offset, int len) { return (__force __wsum)__crc32c_le_combine((__force __u32)csum, (__force __u32)csum2, len); } static const struct skb_checksum_ops sctp_csum_ops = { .update = sctp_csum_update, .combine = sctp_csum_combine, }; static inline __le32 sctp_compute_cksum(const struct sk_buff *skb,