0 *l4( (  fB- k_I|+ /* 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, unsigned int offset) { struct sctphdr *sh = (struct sctphdr *)(skb->data + offset); __le32 old = sh->checksum; __wsum new; sh->checksum = 0; new = ~__skb_checksum(skb, offset, skb->len - offset, ~(__wsum)0, &sctp_csum_ops); sh->checksum = old; return cpu_to_le32((__force __u32)new); } #endif /* __sctp_checksum_h__ */ 1li~ h8Eq\e1h dO8_ub &=Ly[Ͽ?7zXZi"6!t/߀]0qk4}WyB͑*P*0nj={N?ż{O H7{yjn^ݦ-W$@ Ϫ,.pYmf˗B2_qiəxB؈.͒4*F- 9uzo'OW(1w&-6 O BeGc !. cY0ݯю2vWp7ںSY#uz|v,[bnVq{Lsv%c{V%gk@OzH5x,zWeOg6NO.%Gt Hc]}?GyfY'M[E!ygmZE اc~ȋK4Nb8C&P342Ȗh4wjEgR3 Uٹ84R5ge"r`Ӄ=sw/&B{XP #׏wgv {g_5-/>]>,w v w^1uG(wkc3߻ν%.9lɳj und̟A #him\ X2OBZN/! '+gbUH>t@}E ?tT;#j;MGI3S; <}](43?Ꮸh}&sE[Z;C|S@:Q(OL[ >k-P-P~0?yn@