FreeBSD/Linux Kernel Cross Reference
sys/netipsec/ipcomp.h
1 /* $FreeBSD: releng/11.2/sys/netipsec/ipcomp.h 331722 2018-03-29 02:50:57Z eadler $ */
2 /* $KAME: ipcomp.h,v 1.8 2000/09/26 07:55:14 itojun Exp $ */
3
4 /*-
5 * Copyright (C) 1999 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * RFC2393 IP payload compression protocol (IPComp).
35 */
36
37 #ifndef _NETIPSEC_IPCOMP_H_
38 #define _NETIPSEC_IPCOMP_H_
39
40 struct ipcomp {
41 u_int8_t comp_nxt; /* Next Header */
42 u_int8_t comp_flags; /* reserved, must be zero */
43 u_int16_t comp_cpi; /* Compression parameter index */
44 };
45
46 #define IPCOMP_HLENGTH 4 /* Length of IPCOMP header */
47
48 /* well-known algorithm number (in CPI), from RFC2409 */
49 #define IPCOMP_OUI 1 /* vendor specific */
50 #define IPCOMP_DEFLATE 2 /* RFC2394 */
51 #define IPCOMP_LZS 3 /* RFC2395 */
52 #define IPCOMP_MAX 4
53
54 #define IPCOMP_CPI_NEGOTIATE_MIN 256
55 #endif /*_NETIPSEC_IPCOMP_H_*/
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