1 /* $NetBSD: in_offload.h,v 1.4 2006/11/25 18:41:36 yamt Exp $ */
2
3 /*-
4 * Copyright (c)2005, 2006 YAMAMOTO Takashi,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifndef _NETINET_IN_OFFLOAD_H_
30 #define _NETINET_IN_OFFLOAD_H_
31
32 /*
33 * subroutines to do software-only equivalent of h/w offloading.
34 */
35
36 int tcp4_segment(struct mbuf *, int (*)(void *, struct mbuf *), void *);
37 int ip_tso_output(struct ifnet *, struct mbuf *, struct sockaddr *,
38 struct rtentry *);
39
40 /*
41 * offloading related sysctl variables.
42 *
43 * they are here because it violates protocol layering in unusual way.
44 * ie. while they are TCP/UDP sysctls, they are used by IP layer.
45 */
46
47 extern int tcp_do_loopback_cksum; /* do TCP checksum on loopback? */
48 extern int udp_do_loopback_cksum; /* do UDP checksum on loopback? */
49
50 #endif /* !_NETINET_IN_OFFLOAD_H_ */
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