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in6_offload.h revision 1.10 
      1  1.10     rin /*	$NetBSD: in6_offload.h,v 1.10 2018/12/12 01:40:20 rin Exp $	*/
      2   1.1    yamt 
      3   1.9    maxv /*
      4   1.2    yamt  * Copyright (c)2005, 2006 YAMAMOTO Takashi,
      5   1.1    yamt  * All rights reserved.
      6   1.1    yamt  *
      7   1.1    yamt  * Redistribution and use in source and binary forms, with or without
      8   1.1    yamt  * modification, are permitted provided that the following conditions
      9   1.1    yamt  * are met:
     10   1.1    yamt  * 1. Redistributions of source code must retain the above copyright
     11   1.1    yamt  *    notice, this list of conditions and the following disclaimer.
     12   1.1    yamt  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1    yamt  *    notice, this list of conditions and the following disclaimer in the
     14   1.1    yamt  *    documentation and/or other materials provided with the distribution.
     15   1.1    yamt  *
     16   1.1    yamt  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17   1.1    yamt  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18   1.1    yamt  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19   1.1    yamt  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20   1.1    yamt  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21   1.1    yamt  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22   1.1    yamt  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23   1.1    yamt  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24   1.1    yamt  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25   1.1    yamt  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26   1.1    yamt  * SUCH DAMAGE.
     27   1.1    yamt  */
     28   1.1    yamt 
     29   1.1    yamt #if !defined(_NETINET6_IN6_OFFLOAD_H_)
     30   1.1    yamt #define	_NETINET6_IN6_OFFLOAD_H_
     31   1.1    yamt 
     32   1.9    maxv /*
     33   1.9    maxv  * Subroutines to do software-only equivalent of h/w offloading.
     34   1.9    maxv  */
     35  1.10     rin struct mbuf *tcp6_segment(struct mbuf *, int);
     36   1.2    yamt int ip6_tso_output(struct ifnet *, struct ifnet *, struct mbuf *,
     37   1.5  dyoung     const struct sockaddr_in6 *, struct rtentry *);
     38   1.8    maxv void in6_undefer_cksum(struct mbuf *, size_t, int);
     39   1.8    maxv void in6_undefer_cksum_tcpudp(struct mbuf *);
     40   1.1    yamt 
     41   1.7    yamt extern int tcp_do_loopback_cksum; /* do TCP checksum on loopback? */
     42   1.7    yamt extern int udp_do_loopback_cksum; /* do UDP checksum on loopback? */
     43   1.7    yamt 
     44   1.7    yamt #define	IN6_LOOPBACK_NEED_CHECKSUM(csum_flags) \
     45   1.7    yamt 	((((csum_flags) & M_CSUM_UDPv6) != 0 && udp_do_loopback_cksum) || \
     46   1.7    yamt 	(((csum_flags) & M_CSUM_TCPv6) != 0 && tcp_do_loopback_cksum))
     47   1.7    yamt 
     48   1.7    yamt #define	IN6_NEED_CHECKSUM(ifp, csum_flags) \
     49   1.7    yamt 	(__predict_true(((ifp)->if_flags & IFF_LOOPBACK) == 0 || \
     50   1.7    yamt 	IN6_LOOPBACK_NEED_CHECKSUM(csum_flags)))
     51   1.7    yamt 
     52   1.1    yamt #endif /* !defined(_NETINET6_IN6_OFFLOAD_H_) */
     53