FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_ipcomp.h

     /* $OpenBSD: ip_ipcomp.h,v 1.11 2020/09/01 01:53:34 gnezdo Exp $ */
     
     /*
      * Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj@wabbitt.org)
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      *
     * 1. Redistributions of source code must retain the above copyright
     *   notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *   notice, this list of conditions and the following disclaimer in the
     *   documentation and/or other materials provided with the distribution.
     * 3. The name of the author may not be used to endorse or promote products
     *   derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    /* IP payload compression protocol (IPComp), see RFC 2393 */
    
    #ifndef _NETINET_IP_IPCOMP_H_
    #define _NETINET_IP_IPCOMP_H_
    
    struct ipcompstat {
            uint64_t        ipcomps_hdrops; /* Packet shorter than header shows */
            uint64_t        ipcomps_nopf;   /* Protocol family not supported */
            uint64_t        ipcomps_notdb;
            uint64_t        ipcomps_badkcr;
            uint64_t        ipcomps_qfull;
            uint64_t        ipcomps_noxform;
            uint64_t        ipcomps_wrap;
            uint64_t        ipcomps_input;  /* Input IPcomp packets */
            uint64_t        ipcomps_output; /* Output IPcomp packets */
            uint64_t        ipcomps_invalid;        /* Trying to use an invalid
                                                     * TDB */
            uint64_t        ipcomps_ibytes; /* Input bytes */
            uint64_t        ipcomps_obytes; /* Output bytes */
            uint64_t        ipcomps_toobig; /* Packet got larger than
                                             * IP_MAXPACKET */
            uint64_t        ipcomps_pdrops; /* Packet blocked due to policy */
            uint64_t        ipcomps_crypto; /* "Crypto" processing failure */
            uint64_t        ipcomps_minlen; /* packets too short for compress */
            uint64_t        ipcomps_outfail;        /* Packet output failure */
    };
    
    /* IPCOMP header */
    struct ipcomp {
            u_int8_t        ipcomp_nh;      /* Next header */
            u_int8_t        ipcomp_flags;   /* Flags: reserved field: 0 */
            u_int16_t       ipcomp_cpi;     /* Compression Parameter Index,
                                             * Network order */
    };
    
    /* Length of IPCOMP header */
    #define IPCOMP_HLENGTH          4
    
    /*
     * Names for IPCOMP sysctl objects
     */
    #define IPCOMPCTL_ENABLE        1       /* Enable COMP processing */
    #define IPCOMPCTL_STATS         2       /* COMP stats */
    #define IPCOMPCTL_MAXID         3
    
    #define IPCOMPCTL_NAMES { \
            { 0, 0 }, \
            { "enable", CTLTYPE_INT }, \
            { "stats", CTLTYPE_STRUCT }, \
    }
    
    #ifdef _KERNEL
    
    #include <sys/percpu.h>
    
    enum ipcomp_counters {
            ipcomps_hdrops,                 /* Packet shorter than header shows */
            ipcomps_nopf,                   /* Protocol family not supported */
            ipcomps_notdb,
            ipcomps_badkcr,
            ipcomps_qfull,
            ipcomps_noxform,
            ipcomps_wrap,
            ipcomps_input,                  /* Input IPcomp packets */
            ipcomps_output,                 /* Output IPcomp packets */
            ipcomps_invalid,                /* Trying to use an invalid
                                             * TDB */
            ipcomps_ibytes,                 /* Input bytes */
            ipcomps_obytes,                 /* Output bytes */
            ipcomps_toobig,                 /* Packet got larger than
                                            * IP_MAXPACKET */
           ipcomps_pdrops,                 /* Packet blocked due to policy */
           ipcomps_crypto,                 /* "Crypto" processing failure */
           ipcomps_minlen,                 /* packets too short for compress */
           ipcomps_outfail,                /* Packet output failure */
   
           ipcomps_ncounters
   };
   
   extern struct cpumem *ipcompcounters;
   
   static inline void
   ipcompstat_inc(enum ipcomp_counters c)
   {
           counters_inc(ipcompcounters, c);
   }
   
   static inline void
   ipcompstat_add(enum ipcomp_counters c, uint64_t v)
   {
           counters_add(ipcompcounters, c, v);
   }
   
   extern int ipcomp_enable;
   
   #endif                          /* _KERNEL */
   #endif  /* _NETINET_IP_IPCOMP_H_ */

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