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      1  1.12     rin /*	$NetBSD: in_offload.h,v 1.12 2018/12/12 01:40:20 rin Exp $	*/
      2   1.1    yamt 
      3  1.11    maxv /*
      4   1.4    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   1.3    elad #ifndef _NETINET_IN_OFFLOAD_H_
     30   1.2    yamt #define	_NETINET_IN_OFFLOAD_H_
     31   1.2    yamt 
     32   1.1    yamt /*
     33  1.11    maxv  * Subroutines to do software-only equivalent of h/w offloading.
     34   1.1    yamt  */
     35  1.12     rin struct mbuf *tcp4_segment(struct mbuf *, int);
     36   1.5  dyoung int ip_tso_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
     37   1.4    yamt     struct rtentry *);
     38   1.9    maxv void in_undefer_cksum(struct mbuf *, size_t, int);
     39  1.10    maxv void in_undefer_cksum_tcpudp(struct mbuf *);
     40   1.2    yamt 
     41   1.2    yamt /*
     42  1.11    maxv  * Offloading-related sysctl variables.
     43   1.2    yamt  *
     44  1.11    maxv  * They are here because it violates protocol layering in unusual way.
     45   1.2    yamt  * ie. while they are TCP/UDP sysctls, they are used by IP layer.
     46   1.2    yamt  */
     47   1.2    yamt extern int tcp_do_loopback_cksum; /* do TCP checksum on loopback? */
     48   1.2    yamt extern int udp_do_loopback_cksum; /* do UDP checksum on loopback? */
     49   1.1    yamt 
     50   1.8    yamt #define	IN_LOOPBACK_NEED_CHECKSUM(csum_flags) \
     51   1.8    yamt 	((((csum_flags) & M_CSUM_UDPv4) != 0 && udp_do_loopback_cksum) || \
     52   1.8    yamt 	(((csum_flags) & M_CSUM_TCPv4) != 0 && tcp_do_loopback_cksum) || \
     53   1.8    yamt 	(((csum_flags) & M_CSUM_IPv4) != 0 && ip_do_loopback_cksum))
     54   1.8    yamt 
     55   1.6  dyoung #define	IN_NEED_CHECKSUM(ifp, csum_flags) \
     56   1.6  dyoung 	(__predict_true(((ifp)->if_flags & IFF_LOOPBACK) == 0 || \
     57   1.8    yamt 	IN_LOOPBACK_NEED_CHECKSUM(csum_flags)))
     58   1.6  dyoung 
     59   1.3    elad #endif /* !_NETINET_IN_OFFLOAD_H_ */
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