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in_offload.h revision 1.5.6.1 
      1  1.5.6.1   joerg /*	$NetBSD: in_offload.h,v 1.5.6.1 2007/12/03 16:15:09 joerg Exp $	*/
      2      1.1    yamt 
      3      1.1    yamt /*-
      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      1.1    yamt  * subroutines to do software-only equivalent of h/w offloading.
     34      1.1    yamt  */
     35      1.1    yamt 
     36      1.2    yamt int tcp4_segment(struct mbuf *, int (*)(void *, struct mbuf *), void *);
     37      1.5  dyoung int ip_tso_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
     38      1.4    yamt     struct rtentry *);
     39      1.2    yamt 
     40      1.2    yamt /*
     41      1.2    yamt  * offloading related sysctl variables.
     42      1.2    yamt  *
     43      1.2    yamt  * they are here because it violates protocol layering in unusual way.
     44      1.2    yamt  * ie. while they are TCP/UDP sysctls, they are used by IP layer.
     45      1.2    yamt  */
     46      1.1    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  1.5.6.1   joerg #define	IN_NEED_CHECKSUM(ifp, csum_flags) \
     51  1.5.6.1   joerg 	(__predict_true(((ifp)->if_flags & IFF_LOOPBACK) == 0 || \
     52  1.5.6.1   joerg 	(((csum_flags) & M_CSUM_UDPv4) != 0 && udp_do_loopback_cksum) || \
     53  1.5.6.1   joerg 	(((csum_flags) & M_CSUM_TCPv4) != 0 && tcp_do_loopback_cksum) || \
     54  1.5.6.1   joerg 	(((csum_flags) & M_CSUM_IPv4) != 0 && ip_do_loopback_cksum)))
     55  1.5.6.1   joerg 
     56      1.3    elad #endif /* !_NETINET_IN_OFFLOAD_H_ */
     57