The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_ipcomp.h

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    1 /* $OpenBSD: ip_ipcomp.h,v 1.7 2007/12/14 18:33:41 deraadt Exp $ */
    2 
    3 /*
    4  * Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj@wabbitt.org)
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  *
   10  * 1. Redistributions of source code must retain the above copyright
   11  *   notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *   notice, this list of conditions and the following disclaimer in the
   14  *   documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *   derived from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  */
   29 
   30 /* IP payload compression protocol (IPComp), see RFC 2393 */
   31 
   32 #ifndef _NETINET_IP_IPCOMP_H_
   33 #define _NETINET_IP_IPCOMP_H_
   34 
   35 struct ipcompstat {
   36         u_int32_t       ipcomps_hdrops; /* Packet shorter than header shows */
   37         u_int32_t       ipcomps_nopf;   /* Protocol family not supported */
   38         u_int32_t       ipcomps_notdb;
   39         u_int32_t       ipcomps_badkcr;
   40         u_int32_t       ipcomps_qfull;
   41         u_int32_t       ipcomps_noxform;
   42         u_int32_t       ipcomps_wrap;
   43         u_int32_t       ipcomps_input;  /* Input IPcomp packets */
   44         u_int32_t       ipcomps_output; /* Output IPcomp packets */
   45         u_int32_t       ipcomps_invalid;        /* Trying to use an invalid
   46                                                  * TDB */
   47         u_int64_t       ipcomps_ibytes; /* Input bytes */
   48         u_int64_t       ipcomps_obytes; /* Output bytes */
   49         u_int32_t       ipcomps_toobig; /* Packet got larger than
   50                                          * IP_MAXPACKET */
   51         u_int32_t       ipcomps_pdrops; /* Packet blocked due to policy */
   52         u_int32_t       ipcomps_crypto; /* "Crypto" processing failure */
   53         u_int32_t       ipcomps_minlen; /* packets too short for compress */
   54 };
   55 
   56 /* IPCOMP header */
   57 struct ipcomp {
   58         u_int8_t        ipcomp_nh;      /* Next header */
   59         u_int8_t        ipcomp_flags;   /* Flags: reserved field: 0 */
   60         u_int16_t       ipcomp_cpi;     /* Compression Parameter Index,
   61                                          * Network order */
   62 };
   63 
   64 /* Length of IPCOMP header */
   65 #define IPCOMP_HLENGTH          4
   66 
   67 /*
   68  * Names for IPCOMP sysctl objects
   69  */
   70 #define IPCOMPCTL_ENABLE        1       /* Enable COMP processing */
   71 #define IPCOMPCTL_STATS         2       /* COMP stats */
   72 #define IPCOMPCTL_MAXID         3
   73 
   74 #define IPCOMPCTL_NAMES { \
   75         { 0, 0 }, \
   76         { "enable", CTLTYPE_INT }, \
   77         { "stats", CTLTYPE_STRUCT }, \
   78 }
   79 
   80 #define IPCOMPCTL_VARS { \
   81         NULL, \
   82         &ipcomp_enable, \
   83         NULL \
   84 }
   85 
   86 #ifdef _KERNEL
   87 extern int ipcomp_enable;
   88 extern struct ipcompstat ipcompstat;
   89 #endif                          /* _KERNEL */
   90 #endif  /* _NETINET_IP_IPCOMP_H_ */

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