Watt-32 tcp/ip  2.2 dev-rel.10
ipcomp.h
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1 
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 $ */
7 
8 /*
9  * Copyright (C) 1999 WIDE Project.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
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.
23  *
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
34  * SUCH DAMAGE.
35  */
36 
37 /*
38  * RFC2393 IP payload compression protocol (IPComp).
39  */
40 
41 #ifndef _NETINET6_IPCOMP_H_
42 #define _NETINET6_IPCOMP_H_
43 
44 #if defined(_KERNEL) && !defined(_LKM)
45 #include "opt_inet.h"
46 #endif
47 
48 struct ipcomp {
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 */
52 };
53 
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 */
58 #define IPCOMP_MAX 4
59 
60 #define IPCOMP_CPI_NEGOTIATE_MIN 256
61 
62 #ifdef _KERNEL
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 */
67 };
68 
69 struct ipsecrequest;
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 *));
73 #endif /* KERNEL */
74 
75 #endif /* _NETINET6_IPCOMP_H_ */
Definition: ipcomp.h:48
Definition: mbuf.h:6