264 lines
6.2 KiB
C
264 lines
6.2 KiB
C
/* $NetBSD: mlfk_ipl.c,v 1.1.1.6 2004/07/23 05:34:04 martti Exp $ */
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/*
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* Copyright (C) 2000 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/conf.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/ipl.h>
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#include <netinet/ip_compat.h>
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#include <netinet/ip_fil.h>
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#include <netinet/ip_state.h>
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#include <netinet/ip_nat.h>
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#include <netinet/ip_auth.h>
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#include <netinet/ip_frag.h>
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static dev_t ipf_devs[IPL_LOGSIZE];
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static int sysctl_ipf_int ( SYSCTL_HANDLER_ARGS );
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static int ipf_modload(void);
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static int ipf_modunload(void);
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SYSCTL_DECL(_net_inet);
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#define SYSCTL_IPF(parent, nbr, name, access, ptr, val, descr) \
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SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
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ptr, val, sysctl_ipf_int, "I", descr);
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#define CTLFLAG_OFF 0x00800000 /* IPFilter must be disabled */
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#define CTLFLAG_RWO (CTLFLAG_RW|CTLFLAG_OFF)
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SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RWO,
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&fr_tcpidletimeout, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_tcphalfclosed, CTLFLAG_RWO,
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&fr_tcphalfclosed, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RWO,
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&fr_tcpclosewait, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RWO,
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&fr_tcplastack, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RWO,
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&fr_tcptimeout, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RWO,
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&fr_tcpclosed, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RWO,
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&fr_udptimeout, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RWO,
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&fr_icmptimeout, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RWO,
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&fr_defnatage, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
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&fr_ipfrttl, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_unreach, CTLFLAG_RW,
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&fr_unreach, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_running, CTLFLAG_RD,
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&fr_running, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_statesize, CTLFLAG_RWO,
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&fr_statesize, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_statemax, CTLFLAG_RWO,
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&fr_statemax, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, ipf_nattable_sz, CTLFLAG_RWO,
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&ipf_nattable_sz, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, ipf_natrules_sz, CTLFLAG_RWO,
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&ipf_natrules_sz, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, ipf_rdrrules_sz, CTLFLAG_RWO,
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&ipf_rdrrules_sz, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, ipf_hostmap_sz, CTLFLAG_RWO,
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&ipf_hostmap_sz, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RWO,
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&fr_authsize, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
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&fr_authused, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
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&fr_defaultauthage, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_chksrc, CTLFLAG_RW, &fr_chksrc, 0, "");
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SYSCTL_IPF(_net_inet_ipf, OID_AUTO, fr_minttl, CTLFLAG_RW, &fr_minttl, 0, "");
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#define CDEV_MAJOR 79
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#if __FreeBSD_version >= 501000
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static struct cdevsw ipl_cdevsw = {
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.d_open = iplopen,
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.d_close = iplclose,
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.d_read = iplread,
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.d_ioctl = iplioctl,
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.d_name = "ipl",
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.d_maj = CDEV_MAJOR,
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};
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#else
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static struct cdevsw ipl_cdevsw = {
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/* open */ iplopen,
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/* close */ iplclose,
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/* read */ iplread,
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/* write */ nowrite,
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/* ioctl */ iplioctl,
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/* poll */ nopoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "ipl",
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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# if (__FreeBSD_version < 500043)
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/* bmaj */ -1,
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# endif
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/* kqfilter */ NULL
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};
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#endif
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static char *ipf_devfiles[] = { IPL_NAME, IPNAT_NAME, IPSTATE_NAME, IPAUTH_NAME,
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IPSCAN_NAME, IPSYNC_NAME, IPLOOKUP_NAME, NULL };
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static int
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ipfilter_modevent(module_t mod, int type, void *unused)
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{
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int error = 0;
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switch (type)
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{
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case MOD_LOAD :
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error = ipf_modload();
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break;
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case MOD_UNLOAD :
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error = ipf_modunload();
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break;
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default:
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error = EINVAL;
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break;
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}
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return error;
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}
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static int
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ipf_modload()
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{
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char *defpass, *c, *str;
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int i, j, error;
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error = iplattach();
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if (error)
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return error;
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for (i = 0; i < IPL_LOGSIZE; i++)
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ipf_devs[i] = NULL;
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for (i = 0; (str = ipf_devfiles[i]); i++) {
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c = NULL;
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for(j = strlen(str); j > 0; j--)
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if (str[j] == '/') {
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c = str + j + 1;
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break;
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}
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if (!c)
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c = str;
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ipf_devs[i] = make_dev(&ipl_cdevsw, i, 0, 0, 0600, c);
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}
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if (FR_ISPASS(fr_pass))
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defpass = "pass";
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else if (FR_ISBLOCK(fr_pass))
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defpass = "block";
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else
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defpass = "no-match -> block";
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printf("%s initialized. Default = %s all, Logging = %s%s\n",
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ipfilter_version, defpass,
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#ifdef IPFILTER_LOG
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"enabled",
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#else
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"disabled",
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#endif
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#ifdef IPFILTER_COMPILED
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" (COMPILED)"
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#else
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""
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#endif
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);
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return 0;
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}
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static int
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ipf_modunload()
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{
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int error, i;
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if (fr_refcnt)
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return EBUSY;
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if (fr_running >= 0) {
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error = ipldetach();
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if (error != 0)
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return error;
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} else
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error = 0;
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fr_running = -2;
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for (i = 0; ipf_devfiles[i]; i++) {
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if (ipf_devs[i] != NULL)
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destroy_dev(ipf_devs[i]);
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}
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printf("%s unloaded\n", ipfilter_version);
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return error;
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}
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static moduledata_t ipfiltermod = {
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"ipfilter",
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ipfilter_modevent,
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0
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};
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DECLARE_MODULE(ipfilter, ipfiltermod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
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#ifdef MODULE_VERSION
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MODULE_VERSION(ipfilter, 1);
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#endif
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#ifdef SYSCTL_IPF
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int
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sysctl_ipf_int ( SYSCTL_HANDLER_ARGS )
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{
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int error = 0;
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if (arg1)
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error = SYSCTL_OUT(req, arg1, sizeof(int));
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else
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error = SYSCTL_OUT(req, &arg2, sizeof(int));
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if (error || !req->newptr)
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return (error);
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if (!arg1)
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error = EPERM;
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else {
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if ((oidp->oid_kind & CTLFLAG_OFF) && (fr_running > 0))
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error = EBUSY;
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else
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error = SYSCTL_IN(req, arg1, sizeof(int));
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}
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return (error);
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}
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#endif
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