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1 /* $FreeBSD: src/sys/netinet6/ipcomp.h,v 1.1.2.2 2001/07/03 11:01:54 ume Exp $ */
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 _NETINET6_IPCOMP_H_
38 #define _NETINET6_IPCOMP_H_
39 #include <sys/appleapiopts.h>
40 #include <netinet6/ipsec.h>
41
42 struct ipcomp {
43 u_int8_t comp_nxt; /* Next Header */
44 u_int8_t comp_flags; /* reserved, must be zero */
45 u_int16_t comp_cpi; /* Compression parameter index */
46 };
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
56 #ifdef KERNEL
57 #ifdef KERNEL_PRIVATE
58 struct ipcomp_algorithm {
59 int (*compress)(struct mbuf *, struct mbuf *, size_t *);
60 int (*decompress)(struct mbuf *, struct mbuf *, size_t *);
61 size_t minplen; /* minimum required length for compression */
62 };
63
64 struct ipsecrequest;
65 extern const struct ipcomp_algorithm *ipcomp_algorithm_lookup(int);
66 extern void ipcomp4_input(struct mbuf *, int);
67 extern int ipcomp4_output(struct mbuf *, struct secasvar *);
68 #endif /* KERNEL_PRIVATE */
69 #endif /* KERNEL */
70
71 #endif /* _NETINET6_IPCOMP_H_ */