1 /*!\file netinet6/ipcomp.h
5 /* $FreeBSD: src/sys/netinet6/ipcomp.h,v 1.4 2002/04/19 04:46:23 suz Exp $ */
6 /* $KAME: ipcomp.h,v 1.11 2001/09/04 08:43:19 itojun Exp $ */
9 * Copyright (C) 1999 WIDE Project.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the project nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * RFC2393 IP payload compression protocol (IPComp).
41 #ifndef _NETINET6_IPCOMP_H_
42 #define _NETINET6_IPCOMP_H_
44 #if defined(_KERNEL) && !defined(_LKM)
49 u_int8_t comp_nxt; /* Next Header */
50 u_int8_t comp_flags; /* reserved, must be zero */
51 u_int16_t comp_cpi; /* Compression parameter index */
54 /* well-known algorithm number (in CPI), from RFC2409 */
55 #define IPCOMP_OUI 1 /* vendor specific */
56 #define IPCOMP_DEFLATE 2 /* RFC2394 */
57 #define IPCOMP_LZS 3 /* RFC2395 */
60 #define IPCOMP_CPI_NEGOTIATE_MIN 256
63 struct ipcomp_algorithm {
64 int (*compress) __P((struct mbuf *, struct mbuf *, size_t *));
65 int (*decompress) __P((struct mbuf *, struct mbuf *, size_t *));
66 size_t minplen; /* minimum required length for compression */
70 extern const struct ipcomp_algorithm *ipcomp_algorithm_lookup __P((int));
71 extern void ipcomp4_input __P((struct mbuf *, int));
72 extern int ipcomp4_output __P((struct mbuf *, struct ipsecrequest *));
75 #endif /* _NETINET6_IPCOMP_H_ */