197 lines
5.8 KiB
C
197 lines
5.8 KiB
C
/*
|
|
* Copyright 1999 Guido van Rooij. All rights reserved.
|
|
*
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``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 HOLDER OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sysctl.h>
|
|
#include <net/if.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip.h>
|
|
#if (__FreeBSD_version >= 199511)
|
|
# include <net/route.h>
|
|
# include <netinet/ip_var.h>
|
|
# include <netinet/tcp.h>
|
|
# include <netinet/tcpip.h>
|
|
#endif
|
|
|
|
|
|
#include <netinet/ipl.h>
|
|
#include <netinet/ip_compat.h>
|
|
#include <netinet/ip_fil.h>
|
|
#include <netinet/ip_state.h>
|
|
#include <netinet/ip_nat.h>
|
|
#include <netinet/ip_auth.h>
|
|
#include <netinet/ip_frag.h>
|
|
#include <netinet/ip_proxy.h>
|
|
|
|
static dev_t ipf_devs[IPL_LOGMAX + 1];
|
|
|
|
SYSCTL_DECL(_net_inet);
|
|
SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
|
|
&fr_tcpidletimeout, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
|
|
&fr_tcpclosewait, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
|
|
&fr_tcplastack, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
|
|
&fr_tcptimeout, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
|
|
&fr_tcpclosed, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcphalfclosed, CTLFLAG_RW,
|
|
&fr_tcphalfclosed, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
|
|
&fr_udptimeout, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
|
|
&fr_icmptimeout, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RW,
|
|
&fr_defnatage, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
|
|
&fr_ipfrttl, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_unreach, CTLFLAG_RW,
|
|
&ipl_unreach, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_running, CTLFLAG_RD,
|
|
&fr_running, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RD,
|
|
&fr_authsize, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
|
|
&fr_authused, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
|
|
&fr_defaultauthage, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_chksrc, CTLFLAG_RW, &fr_chksrc, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, ippr_ftp_pasvonly, CTLFLAG_RW,
|
|
&ippr_ftp_pasvonly, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_minttl, CTLFLAG_RW, &fr_minttl, 0, "");
|
|
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_minttllog, CTLFLAG_RW,
|
|
&fr_minttllog, 0, "");
|
|
|
|
#define CDEV_MAJOR 79
|
|
static struct cdevsw ipl_cdevsw = {
|
|
/* open */ iplopen,
|
|
/* close */ iplclose,
|
|
/* read */ iplread,
|
|
/* write */ nowrite,
|
|
/* ioctl */ iplioctl,
|
|
/* poll */ nopoll,
|
|
/* mmap */ nommap,
|
|
/* strategy */ nostrategy,
|
|
/* name */ "ipl",
|
|
/* maj */ CDEV_MAJOR,
|
|
/* dump */ nodump,
|
|
/* psize */ nopsize,
|
|
/* flags */ 0,
|
|
};
|
|
|
|
static int
|
|
ipfilter_modevent(module_t mod, int type, void *unused)
|
|
{
|
|
char *c;
|
|
int i, error = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD :
|
|
|
|
error = iplattach();
|
|
if (error)
|
|
break;
|
|
|
|
c = NULL;
|
|
for(i=strlen(IPL_NAME); i>0; i--)
|
|
if (IPL_NAME[i] == '/') {
|
|
c = &IPL_NAME[i+1];
|
|
break;
|
|
}
|
|
if (!c)
|
|
c = IPL_NAME;
|
|
ipf_devs[IPL_LOGIPF] =
|
|
make_dev(&ipl_cdevsw, IPL_LOGIPF, 0, 0, 0600, c);
|
|
|
|
c = NULL;
|
|
for(i=strlen(IPL_NAT); i>0; i--)
|
|
if (IPL_NAT[i] == '/') {
|
|
c = &IPL_NAT[i+1];
|
|
break;
|
|
}
|
|
if (!c)
|
|
c = IPL_NAT;
|
|
ipf_devs[IPL_LOGNAT] =
|
|
make_dev(&ipl_cdevsw, IPL_LOGNAT, 0, 0, 0600, c);
|
|
|
|
c = NULL;
|
|
for(i=strlen(IPL_STATE); i>0; i--)
|
|
if (IPL_STATE[i] == '/') {
|
|
c = &IPL_STATE[i+1];
|
|
break;
|
|
}
|
|
if (!c)
|
|
c = IPL_STATE;
|
|
ipf_devs[IPL_LOGSTATE] =
|
|
make_dev(&ipl_cdevsw, IPL_LOGSTATE, 0, 0, 0600, c);
|
|
|
|
c = NULL;
|
|
for(i=strlen(IPL_AUTH); i>0; i--)
|
|
if (IPL_AUTH[i] == '/') {
|
|
c = &IPL_AUTH[i+1];
|
|
break;
|
|
}
|
|
if (!c)
|
|
c = IPL_AUTH;
|
|
ipf_devs[IPL_LOGAUTH] =
|
|
make_dev(&ipl_cdevsw, IPL_LOGAUTH, 0, 0, 0600, c);
|
|
|
|
break;
|
|
case MOD_UNLOAD :
|
|
destroy_dev(ipf_devs[IPL_LOGIPF]);
|
|
destroy_dev(ipf_devs[IPL_LOGNAT]);
|
|
destroy_dev(ipf_devs[IPL_LOGSTATE]);
|
|
destroy_dev(ipf_devs[IPL_LOGAUTH]);
|
|
error = ipldetach();
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static moduledata_t ipfiltermod = {
|
|
IPL_VERSION,
|
|
ipfilter_modevent,
|
|
0
|
|
};
|
|
DECLARE_MODULE(ipfilter, ipfiltermod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
|