53 lines
2.3 KiB
C
53 lines
2.3 KiB
C
/* $NetBSD: in6_offload.h,v 1.7 2011/04/25 22:20:59 yamt Exp $ */
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/*-
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* Copyright (c)2005, 2006 YAMAMOTO Takashi,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* subroutines to do software-only equivalent of h/w offloading.
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*/
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#if !defined(_NETINET6_IN6_OFFLOAD_H_)
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#define _NETINET6_IN6_OFFLOAD_H_
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int tcp6_segment(struct mbuf *, int (*)(void *, struct mbuf *), void *);
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int ip6_tso_output(struct ifnet *, struct ifnet *, struct mbuf *,
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const struct sockaddr_in6 *, struct rtentry *);
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void ip6_undefer_csum(struct mbuf *, size_t, int);
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extern int tcp_do_loopback_cksum; /* do TCP checksum on loopback? */
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extern int udp_do_loopback_cksum; /* do UDP checksum on loopback? */
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#define IN6_LOOPBACK_NEED_CHECKSUM(csum_flags) \
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((((csum_flags) & M_CSUM_UDPv6) != 0 && udp_do_loopback_cksum) || \
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(((csum_flags) & M_CSUM_TCPv6) != 0 && tcp_do_loopback_cksum))
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#define IN6_NEED_CHECKSUM(ifp, csum_flags) \
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(__predict_true(((ifp)->if_flags & IFF_LOOPBACK) == 0 || \
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IN6_LOOPBACK_NEED_CHECKSUM(csum_flags)))
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#endif /* !defined(_NETINET6_IN6_OFFLOAD_H_) */
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