contrib/ipfilter/mlfk_ipl.c

   1 /*
   2  * Copyright 1999 Guido van Rooij.  All rights reserved.
   3  *
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *  1. Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *  2. Redistributions in binary form must reproduce the above copyright notice,
  11  *     this list of conditions and the following disclaimer in the documentation
  12  *     and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS
  15  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  * DISCLAIMED.  IN NO EVENT SHALL THE HOLDER OR CONTRIBUTORS BE LIABLE FOR
  18  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  20  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  21  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $Id: mlfk_ipl.c,v 2.1.2.4 2000/08/23 11:02:33 darrenr Exp $
  27  */
  28
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/module.h>
  34 #include <sys/conf.h>
  35 #include <sys/socket.h>
  36 #include <sys/sysctl.h>
  37 #include <net/if.h>
  38 #include <netinet/in_systm.h>
  39 #include <netinet/in.h>
  40 #include <netinet/ip.h>
  41
  42
  43 #include <netinet/ipl.h>
  44 #include <netinet/ip_compat.h>
  45 #include <netinet/ip_fil.h>
  46 #include <netinet/ip_state.h>
  47 #include <netinet/ip_nat.h>
  48 #include <netinet/ip_auth.h>
  49 #include <netinet/ip_frag.h>
  50
  51 static dev_t ipf_devs[IPL_LOGMAX + 1];
  52
  53 SYSCTL_DECL(_net_inet);
  54 SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
  55 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
  56 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
  57 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
  58 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
  59            &fr_tcpidletimeout, 0, "");
  60 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
  61            &fr_tcpclosewait, 0, "");
  62 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
  63            &fr_tcplastack, 0, "");
  64 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
  65            &fr_tcptimeout, 0, "");
  66 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
  67            &fr_tcpclosed, 0, "");
  68 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcphalfclosed, CTLFLAG_RW,
  69            &fr_tcphalfclosed, 0, "");
  70 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
  71            &fr_udptimeout, 0, "");
  72 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
  73            &fr_icmptimeout, 0, "");
  74 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RW,
  75            &fr_defnatage, 0, "");
  76 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
  77            &fr_ipfrttl, 0, "");
  78 SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_unreach, CTLFLAG_RW,
  79            &ipl_unreach, 0, "");
  80 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_running, CTLFLAG_RD,
  81            &fr_running, 0, "");
  82 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RD,
  83            &fr_authsize, 0, "");
  84 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
  85            &fr_authused, 0, "");
  86 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
  87            &fr_defaultauthage, 0, "");
  88 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_chksrc, CTLFLAG_RW, &fr_chksrc, 0, "");
  89
  90 #define CDEV_MAJOR 79
  91 static struct cdevsw ipl_cdevsw = {
  92         /* open */      iplopen,
  93         /* close */     iplclose,
  94         /* read */      iplread,
  95         /* write */     nowrite,
  96         /* ioctl */     iplioctl,
  97         /* poll */      nopoll,
  98         /* mmap */      nommap,
  99         /* strategy */  nostrategy,
 100         /* name */      "ipl",
 101         /* maj */       CDEV_MAJOR,
 102         /* dump */      nodump,
 103         /* psize */     nopsize,
 104         /* flags */     0,
 105         /* bmaj */      -1
 106 };
 107
 108 static int
 109 ipfilter_modevent(module_t mod, int type, void *unused)
 110 {
 111         char    *c;
 112         int     i, error = 0;
 113
 114         switch (type) {
 115         case MOD_LOAD :
 116
 117                 error = iplattach();
 118                 if (error)
 119                         break;
 120
 121                 c = NULL;
 122                 for(i=strlen(IPL_NAME); i>0; i--)
 123                         if (IPL_NAME[i] == '/') {
 124                                 c = &IPL_NAME[i+1];
 125                                 break;
 126                         }
 127                 if (!c)
 128                         c = IPL_NAME;
 129                 ipf_devs[IPL_LOGIPF] =
 130                     make_dev(&ipl_cdevsw, IPL_LOGIPF, 0, 0, 0600, c);
 131
 132                 c = NULL;
 133                 for(i=strlen(IPL_NAT); i>0; i--)
 134                         if (IPL_NAT[i] == '/') {
 135                                 c = &IPL_NAT[i+1];
 136                                 break;
 137                         }
 138                 if (!c)
 139                         c = IPL_NAT;
 140                 ipf_devs[IPL_LOGNAT] =
 141                     make_dev(&ipl_cdevsw, IPL_LOGNAT, 0, 0, 0600, c);
 142
 143                 c = NULL;
 144                 for(i=strlen(IPL_STATE); i>0; i--)
 145                         if (IPL_STATE[i] == '/') {
 146                                 c = &IPL_STATE[i+1];
 147                                 break;
 148                         }
 149                 if (!c)
 150                         c = IPL_STATE;
 151                 ipf_devs[IPL_LOGSTATE] =
 152                     make_dev(&ipl_cdevsw, IPL_LOGSTATE, 0, 0, 0600, c);
 153
 154                 c = NULL;
 155                 for(i=strlen(IPL_AUTH); i>0; i--)
 156                         if (IPL_AUTH[i] == '/') {
 157                                 c = &IPL_AUTH[i+1];
 158                                 break;
 159                         }
 160                 if (!c)
 161                         c = IPL_AUTH;
 162                 ipf_devs[IPL_LOGAUTH] =
 163                     make_dev(&ipl_cdevsw, IPL_LOGAUTH, 0, 0, 0600, c);
 164
 165                 break;
 166         case MOD_UNLOAD :
 167                 destroy_dev(ipf_devs[IPL_LOGIPF]);
 168                 destroy_dev(ipf_devs[IPL_LOGNAT]);
 169                 destroy_dev(ipf_devs[IPL_LOGSTATE]);
 170                 destroy_dev(ipf_devs[IPL_LOGAUTH]);
 171                 error = ipldetach();
 172                 break;
 173         default:
 174                 error = EINVAL;
 175                 break;
 176         }
 177         return error;
 178 }
 179
 180 static moduledata_t ipfiltermod = {
 181         IPL_VERSION,
 182         ipfilter_modevent,
 183         0
 184 };
 185 DECLARE_MODULE(ipfilter, ipfiltermod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);