sys/contrib/ipfilter/netinet/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  * $FreeBSD: src/sys/contrib/ipfilter/netinet/mlfk_ipl.c,v 1.9.2.2 2002/04/27 17:37:12 darrenr Exp $
  27  * $DragonFly: src/sys/contrib/ipfilter/netinet/mlfk_ipl.c,v 1.4 2003/08/07 21:16:48 dillon Exp $
  28  */
  29
  30
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35 #include <sys/conf.h>
  36 #include <sys/socket.h>
  37 #include <sys/sysctl.h>
  38 #include <net/if.h>
  39 #include <netinet/in_systm.h>
  40 #include <netinet/in.h>
  41 #include <netinet/ip.h>
  42 #if (__FreeBSD_version >= 199511)
  43 # include <net/route.h>
  44 # include <netinet/ip_var.h>
  45 # include <netinet/tcp.h>
  46 # include <netinet/tcpip.h>
  47 #endif
  48
  49
  50 #include "ipl.h"
  51 #include "ip_compat.h"
  52 #include "ip_fil.h"
  53 #include "ip_state.h"
  54 #include "ip_nat.h"
  55 #include "ip_auth.h"
  56 #include "ip_frag.h"
  57 #include "ip_proxy.h"
  58
  59 static dev_t ipf_devs[IPL_LOGMAX + 1];
  60
  61 SYSCTL_DECL(_net_inet);
  62 SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
  63 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
  64 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
  65 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
  66 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
  67            &fr_tcpidletimeout, 0, "");
  68 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
  69            &fr_tcpclosewait, 0, "");
  70 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
  71            &fr_tcplastack, 0, "");
  72 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
  73            &fr_tcptimeout, 0, "");
  74 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
  75            &fr_tcpclosed, 0, "");
  76 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcphalfclosed, CTLFLAG_RW,
  77            &fr_tcphalfclosed, 0, "");
  78 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
  79            &fr_udptimeout, 0, "");
  80 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udpacktimeout, CTLFLAG_RW,
  81            &fr_udpacktimeout, 0, "");
  82 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
  83            &fr_icmptimeout, 0, "");
  84 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmpacktimeout, CTLFLAG_RW,
  85            &fr_icmpacktimeout, 0, "");
  86 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RW,
  87            &fr_defnatage, 0, "");
  88 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
  89            &fr_ipfrttl, 0, "");
  90 SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_unreach, CTLFLAG_RW,
  91            &ipl_unreach, 0, "");
  92 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_running, CTLFLAG_RD,
  93            &fr_running, 0, "");
  94 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RD,
  95            &fr_authsize, 0, "");
  96 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
  97            &fr_authused, 0, "");
  98 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
  99            &fr_defaultauthage, 0, "");
 100 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_chksrc, CTLFLAG_RW, &fr_chksrc, 0, "");
 101 SYSCTL_INT(_net_inet_ipf, OID_AUTO, ippr_ftp_pasvonly, CTLFLAG_RW,
 102            &ippr_ftp_pasvonly, 0, "");
 103 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_minttl, CTLFLAG_RW, &fr_minttl, 0, "");
 104 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_minttllog, CTLFLAG_RW,
 105            &fr_minttllog, 0, "");
 106
 107 #define CDEV_MAJOR 79
 108 static struct cdevsw ipl_cdevsw = {
 109         /* name */      "ipl",
 110         /* maj */       CDEV_MAJOR,
 111         /* flags */     0,
 112         /* port */      NULL,
 113         /* autoq */     0,
 114
 115         /* open */      iplopen,
 116         /* close */     iplclose,
 117         /* read */      iplread,
 118         /* write */     nowrite,
 119         /* ioctl */     iplioctl,
 120         /* poll */      nopoll,
 121         /* mmap */      nommap,
 122         /* strategy */  nostrategy,
 123         /* dump */      nodump,
 124         /* psize */     nopsize
 125 };
 126
 127 static int
 128 ipfilter_modevent(module_t mod, int type, void *unused)
 129 {
 130         char    *c;
 131         int     i, error = 0;
 132
 133         switch (type) {
 134         case MOD_LOAD :
 135
 136                 error = iplattach();
 137                 if (error)
 138                         break;
 139
 140                 c = NULL;
 141                 for(i=strlen(IPL_NAME); i>0; i--)
 142                         if (IPL_NAME[i] == '/') {
 143                                 c = &IPL_NAME[i+1];
 144                                 break;
 145                         }
 146                 if (!c)
 147                         c = IPL_NAME;
 148                 ipf_devs[IPL_LOGIPF] =
 149                     make_dev(&ipl_cdevsw, IPL_LOGIPF, 0, 0, 0600, c);
 150
 151                 c = NULL;
 152                 for(i=strlen(IPL_NAT); i>0; i--)
 153                         if (IPL_NAT[i] == '/') {
 154                                 c = &IPL_NAT[i+1];
 155                                 break;
 156                         }
 157                 if (!c)
 158                         c = IPL_NAT;
 159                 ipf_devs[IPL_LOGNAT] =
 160                     make_dev(&ipl_cdevsw, IPL_LOGNAT, 0, 0, 0600, c);
 161
 162                 c = NULL;
 163                 for(i=strlen(IPL_STATE); i>0; i--)
 164                         if (IPL_STATE[i] == '/') {
 165                                 c = &IPL_STATE[i+1];
 166                                 break;
 167                         }
 168                 if (!c)
 169                         c = IPL_STATE;
 170                 ipf_devs[IPL_LOGSTATE] =
 171                     make_dev(&ipl_cdevsw, IPL_LOGSTATE, 0, 0, 0600, c);
 172
 173                 c = NULL;
 174                 for(i=strlen(IPL_AUTH); i>0; i--)
 175                         if (IPL_AUTH[i] == '/') {
 176                                 c = &IPL_AUTH[i+1];
 177                                 break;
 178                         }
 179                 if (!c)
 180                         c = IPL_AUTH;
 181                 ipf_devs[IPL_LOGAUTH] =
 182                     make_dev(&ipl_cdevsw, IPL_LOGAUTH, 0, 0, 0600, c);
 183
 184                 break;
 185         case MOD_UNLOAD :
 186                 destroy_dev(ipf_devs[IPL_LOGIPF]);
 187                 destroy_dev(ipf_devs[IPL_LOGNAT]);
 188                 destroy_dev(ipf_devs[IPL_LOGSTATE]);
 189                 destroy_dev(ipf_devs[IPL_LOGAUTH]);
 190                 error = ipldetach();
 191                 break;
 192         default:
 193                 error = EINVAL;
 194                 break;
 195         }
 196         return error;
 197 }
 198
 199 static moduledata_t ipfiltermod = {
 200         IPL_VERSION,
 201         ipfilter_modevent,
 202         0
 203 };
 204 DECLARE_MODULE(ipfilter, ipfiltermod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);