| 1 | /* $FreeBSD: src/sys/netinet6/ipcomp.h,v 1.4 2002/04/19 04:46:23 suz Exp $ */ |
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| 2 | /* $KAME: ipcomp.h,v 1.11 2001/09/04 08:43:19 itojun Exp $ */ |
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| 3 | |
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| 4 | /* |
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| 5 | * Copyright (C) 1999 WIDE Project. |
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| 6 | * All rights reserved. |
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| 7 | * |
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| 8 | * Redistribution and use in source and binary forms, with or without |
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| 9 | * modification, are permitted provided that the following conditions |
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| 10 | * are met: |
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| 11 | * 1. Redistributions of source code must retain the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer. |
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer in the |
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| 15 | * documentation and/or other materials provided with the distribution. |
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| 16 | * 3. Neither the name of the project nor the names of its contributors |
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| 17 | * may be used to endorse or promote products derived from this software |
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| 18 | * without specific prior written permission. |
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| 19 | * |
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 30 | * SUCH DAMAGE. |
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| 31 | */ |
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| 32 | |
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| 33 | /* |
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| 34 | * RFC2393 IP payload compression protocol (IPComp). |
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| 35 | */ |
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| 36 | |
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| 37 | #ifndef _NETINET6_IPCOMP_H_ |
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| 38 | #define _NETINET6_IPCOMP_H_ |
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| 39 | |
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| 40 | #if defined(_KERNEL) && !defined(_LKM) |
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| 41 | #include "opt_inet.h" |
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| 42 | #endif |
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| 43 | |
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| 44 | struct ipcomp { |
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| 45 | u_int8_t comp_nxt; /* Next Header */ |
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| 46 | u_int8_t comp_flags; /* reserved, must be zero */ |
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| 47 | u_int16_t comp_cpi; /* Compression parameter index */ |
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| 48 | }; |
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| 49 | |
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| 50 | /* well-known algorithm number (in CPI), from RFC2409 */ |
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| 51 | #define IPCOMP_OUI 1 /* vendor specific */ |
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| 52 | #define IPCOMP_DEFLATE 2 /* RFC2394 */ |
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| 53 | #define IPCOMP_LZS 3 /* RFC2395 */ |
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| 54 | #define IPCOMP_MAX 4 |
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| 55 | |
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| 56 | #define IPCOMP_CPI_NEGOTIATE_MIN 256 |
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| 57 | |
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| 58 | #ifdef _KERNEL |
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| 59 | struct ipcomp_algorithm { |
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| 60 | int (*compress) __P((struct mbuf *, struct mbuf *, size_t *)); |
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| 61 | int (*decompress) __P((struct mbuf *, struct mbuf *, size_t *)); |
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| 62 | size_t minplen; /* minimum required length for compression */ |
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| 63 | }; |
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| 64 | |
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| 65 | struct ipsecrequest; |
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| 66 | extern const struct ipcomp_algorithm *ipcomp_algorithm_lookup __P((int)); |
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| 67 | extern void ipcomp4_input __P((struct mbuf *, int)); |
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| 68 | extern int ipcomp4_output __P((struct mbuf *, struct ipsecrequest *)); |
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| 69 | #endif /* KERNEL */ |
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| 70 | |
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| 71 | #endif /* _NETINET6_IPCOMP_H_ */ |
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