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 BSD_KERNEL_PRIVATE |
57 | struct ipcomp_algorithm { |
58 | int (*compress)(struct mbuf *, struct mbuf *, size_t *); |
59 | int (*decompress)(struct mbuf *, struct mbuf *, size_t *); |
60 | size_t minplen; /* minimum required length for compression */ |
61 | }; |
62 | |
63 | struct ipsecrequest; |
64 | extern const struct ipcomp_algorithm *ipcomp_algorithm_lookup(int); |
65 | extern void ipcomp4_input(struct mbuf *, int); |
66 | extern int ipcomp4_output(struct mbuf *, struct secasvar *); |
67 | #endif /* BSD_KERNEL_PRIVATE */ |
68 | |
69 | #endif /* _NETINET6_IPCOMP_H_ */ |
70 | |