/* $NetBSD: in6_offload.h,v 1.10 2018/12/12 01:40:20 rin Exp $ */ /* * Copyright (c)2005, 2006 YAMAMOTO Takashi, * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if !defined(_NETINET6_IN6_OFFLOAD_H_) #define _NETINET6_IN6_OFFLOAD_H_ /* * Subroutines to do software-only equivalent of h/w offloading. */ struct mbuf *tcp6_segment(struct mbuf *, int); int ip6_tso_output(struct ifnet *, struct ifnet *, struct mbuf *, const struct sockaddr_in6 *, struct rtentry *); void in6_undefer_cksum(struct mbuf *, size_t, int); void in6_undefer_cksum_tcpudp(struct mbuf *); extern int tcp_do_loopback_cksum; /* do TCP checksum on loopback? */ extern int udp_do_loopback_cksum; /* do UDP checksum on loopback? */ #define IN6_LOOPBACK_NEED_CHECKSUM(csum_flags) \ ((((csum_flags) & M_CSUM_UDPv6) != 0 && udp_do_loopback_cksum) || \ (((csum_flags) & M_CSUM_TCPv6) != 0 && tcp_do_loopback_cksum)) #define IN6_NEED_CHECKSUM(ifp, csum_flags) \ (__predict_true(((ifp)->if_flags & IFF_LOOPBACK) == 0 || \ IN6_LOOPBACK_NEED_CHECKSUM(csum_flags))) #endif /* !defined(_NETINET6_IN6_OFFLOAD_H_) */ |