563 lines
11 KiB
C
563 lines
11 KiB
C
/* $NetBSD: ipf.c,v 1.1.1.3 2005/02/08 06:53:23 martti Exp $ */
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/*
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* Copyright (C) 1993-2001 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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#ifdef __FreeBSD__
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# ifndef __FreeBSD_cc_version
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# include <osreldate.h>
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# else
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# if __FreeBSD_cc_version < 430000
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# include <osreldate.h>
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# endif
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# endif
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#endif
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#include "ipf.h"
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include "netinet/ipl.h"
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#if !defined(lint)
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static const char sccsid[] = "@(#)ipf.c 1.23 6/5/96 (C) 1993-2000 Darren Reed";
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static const char rcsid[] = "@(#)Id: ipf.c,v 1.35.2.3 2004/12/15 18:27:17 darrenr Exp";
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#endif
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#if !defined(__SVR4) && defined(__GNUC__)
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extern char *index __P((const char *, int));
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#endif
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extern char *optarg;
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extern int optind;
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extern frentry_t *frtop;
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void ipf_frsync __P((void));
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void zerostats __P((void));
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int main __P((int, char *[]));
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int opts = 0;
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int outputc = 0;
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int use_inet6 = 0;
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static void procfile __P((char *, char *)), flushfilter __P((char *));
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static void set_state __P((u_int)), showstats __P((friostat_t *));
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static void packetlogon __P((char *)), swapactive __P((void));
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static int opendevice __P((char *, int));
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static void closedevice __P((void));
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static char *ipfname = IPL_NAME;
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static void usage __P((void));
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static int showversion __P((void));
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static int get_flags __P((void));
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static void ipf_interceptadd __P((int, ioctlfunc_t, void *));
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static int fd = -1;
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static ioctlfunc_t iocfunctions[IPL_LOGSIZE] = { ioctl, ioctl, ioctl,
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ioctl, ioctl, ioctl,
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ioctl, ioctl };
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static void usage()
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{
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fprintf(stderr, "usage: ipf [-6AdDEInoPrRsvVyzZ] %s %s %s\n",
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"[-l block|pass|nomatch|state|nat]", "[-cc] [-F i|o|a|s|S|u]",
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"[-f filename] [-T <tuneopts>]");
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exit(1);
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}
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int main(argc,argv)
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int argc;
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char *argv[];
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{
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int c;
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if (argc < 2)
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usage();
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while ((c = getopt(argc, argv, "6Ac:dDEf:F:Il:noPrRsT:vVyzZ")) != -1) {
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switch (c)
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{
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case '?' :
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usage();
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break;
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#ifdef USE_INET6
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case '6' :
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use_inet6 = 1;
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break;
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#endif
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case 'A' :
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opts &= ~OPT_INACTIVE;
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break;
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case 'c' :
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if (strcmp(optarg, "c") == 0)
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outputc = 1;
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break;
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case 'E' :
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set_state((u_int)1);
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break;
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case 'D' :
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set_state((u_int)0);
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break;
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case 'd' :
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opts ^= OPT_DEBUG;
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break;
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case 'f' :
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procfile(argv[0], optarg);
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break;
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case 'F' :
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flushfilter(optarg);
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break;
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case 'I' :
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opts ^= OPT_INACTIVE;
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break;
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case 'l' :
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packetlogon(optarg);
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break;
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case 'n' :
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opts ^= OPT_DONOTHING;
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break;
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case 'o' :
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break;
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case 'P' :
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ipfname = IPAUTH_NAME;
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break;
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case 'R' :
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opts ^= OPT_NORESOLVE;
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break;
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case 'r' :
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opts ^= OPT_REMOVE;
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break;
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case 's' :
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swapactive();
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break;
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case 'T' :
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if (opendevice(ipfname, 1) >= 0)
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ipf_dotuning(fd, optarg, ioctl);
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break;
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case 'v' :
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opts += OPT_VERBOSE;
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break;
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case 'V' :
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if (showversion())
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exit(1);
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break;
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case 'y' :
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ipf_frsync();
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break;
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case 'z' :
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opts ^= OPT_ZERORULEST;
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break;
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case 'Z' :
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zerostats();
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break;
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}
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}
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if (optind < 2)
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usage();
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if (fd != -1)
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(void) close(fd);
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return(0);
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/* NOTREACHED */
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}
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static int opendevice(ipfdev, check)
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char *ipfdev;
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int check;
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{
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if (opts & OPT_DONOTHING)
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return -2;
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if (check && checkrev(ipfname) == -1) {
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fprintf(stderr, "User/kernel version check failed\n");
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return -2;
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}
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if (!ipfdev)
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ipfdev = ipfname;
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if (fd == -1)
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if ((fd = open(ipfdev, O_RDWR)) == -1)
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if ((fd = open(ipfdev, O_RDONLY)) == -1)
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perror("open device");
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return fd;
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}
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static void closedevice()
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{
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close(fd);
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fd = -1;
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}
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static int get_flags()
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{
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int i;
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if ((opendevice(ipfname, 1) != -2) &&
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(ioctl(fd, SIOCGETFF, &i) == -1)) {
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perror("SIOCGETFF");
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return 0;
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}
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return i;
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}
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static void set_state(enable)
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u_int enable;
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{
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if (opendevice(ipfname, 0) != -2)
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if (ioctl(fd, SIOCFRENB, &enable) == -1) {
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if (errno == EBUSY)
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fprintf(stderr,
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"IP FIlter: already initialized\n");
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else
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perror("SIOCFRENB");
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}
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return;
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}
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static void procfile(name, file)
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char *name, *file;
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{
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(void) opendevice(ipfname, 1);
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initparse();
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ipf_parsefile(fd, ipf_interceptadd, iocfunctions, file);
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if (outputc) {
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printC(0);
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printC(1);
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emit(-1, -1, NULL, NULL);
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}
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}
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static void ipf_interceptadd(fd, ioctlfunc, ptr)
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int fd;
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ioctlfunc_t ioctlfunc;
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void *ptr;
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{
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if (outputc)
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printc(ptr);
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ipf_addrule(fd, ioctlfunc, ptr);
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}
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static void packetlogon(opt)
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char *opt;
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{
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int flag, xfd, logopt, change = 0;
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flag = get_flags();
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if (flag != 0) {
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if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE)
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printf("log flag is currently %#x\n", flag);
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}
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flag &= ~(FF_LOGPASS|FF_LOGNOMATCH|FF_LOGBLOCK);
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if (strstr(opt, "pass")) {
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flag |= FF_LOGPASS;
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if (opts & OPT_VERBOSE)
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printf("set log flag: pass\n");
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change = 1;
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}
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if (strstr(opt, "nomatch")) {
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flag |= FF_LOGNOMATCH;
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if (opts & OPT_VERBOSE)
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printf("set log flag: nomatch\n");
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change = 1;
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}
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if (strstr(opt, "block") || index(opt, 'd')) {
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flag |= FF_LOGBLOCK;
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if (opts & OPT_VERBOSE)
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printf("set log flag: block\n");
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change = 1;
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}
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if (strstr(opt, "none")) {
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if (opts & OPT_VERBOSE)
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printf("disable all log flags\n");
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change = 1;
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}
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if (change == 1) {
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if (opendevice(ipfname, 1) != -2 &&
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(ioctl(fd, SIOCSETFF, &flag) != 0))
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perror("ioctl(SIOCSETFF)");
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}
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if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
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flag = get_flags();
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printf("log flags are now %#x\n", flag);
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}
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if (strstr(opt, "state")) {
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if (opts & OPT_VERBOSE)
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printf("set state log flag\n");
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xfd = open(IPSTATE_NAME, O_RDWR);
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if (xfd >= 0) {
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logopt = 0;
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if (ioctl(xfd, SIOCGETLG, &logopt))
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perror("ioctl(SIOCGETLG)");
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else {
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logopt = 1 - logopt;
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if (ioctl(xfd, SIOCSETLG, &logopt))
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perror("ioctl(SIOCSETLG)");
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}
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close(xfd);
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}
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}
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if (strstr(opt, "nat")) {
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if (opts & OPT_VERBOSE)
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printf("set nat log flag\n");
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xfd = open(IPNAT_NAME, O_RDWR);
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if (xfd >= 0) {
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logopt = 0;
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if (ioctl(xfd, SIOCGETLG, &logopt))
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perror("ioctl(SIOCGETLG)");
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else {
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logopt = 1 - logopt;
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if (ioctl(xfd, SIOCSETLG, &logopt))
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perror("ioctl(SIOCSETLG)");
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}
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close(xfd);
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}
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}
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}
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static void flushfilter(arg)
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char *arg;
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{
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int fl = 0, rem;
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if (!arg || !*arg)
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return;
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if (!strcmp(arg, "s") || !strcmp(arg, "S")) {
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if (*arg == 'S')
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fl = 0;
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else
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fl = 1;
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rem = fl;
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closedevice();
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if (opendevice(IPSTATE_NAME, 1) == -2)
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exit(1);
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if (!(opts & OPT_DONOTHING)) {
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if (use_inet6) {
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if (ioctl(fd, SIOCIPFL6, &fl) == -1) {
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perror("ioctl(SIOCIPFL6)");
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exit(1);
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}
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} else {
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if (ioctl(fd, SIOCIPFFL, &fl) == -1) {
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perror("ioctl(SIOCIPFFL)");
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exit(1);
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}
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}
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}
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if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
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printf("remove flags %s (%d)\n", arg, rem);
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printf("removed %d filter rules\n", fl);
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}
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closedevice();
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return;
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}
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#ifdef SIOCIPFFA
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if (!strcmp(arg, "u")) {
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closedevice();
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/*
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* Flush auth rules and packets
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*/
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if (opendevice(IPL_AUTH, 1) == -1)
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perror("open(IPL_AUTH)");
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else {
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if (ioctl(fd, SIOCIPFFA, &fl) == -1)
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perror("ioctl(SIOCIPFFA)");
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}
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closedevice();
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return;
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}
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#endif
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if (strchr(arg, 'i') || strchr(arg, 'I'))
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fl = FR_INQUE;
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if (strchr(arg, 'o') || strchr(arg, 'O'))
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fl = FR_OUTQUE;
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if (strchr(arg, 'a') || strchr(arg, 'A'))
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fl = FR_OUTQUE|FR_INQUE;
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if (opts & OPT_INACTIVE)
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fl |= FR_INACTIVE;
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rem = fl;
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if (opendevice(ipfname, 1) == -2)
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exit(1);
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if (!(opts & OPT_DONOTHING)) {
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if (use_inet6) {
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if (ioctl(fd, SIOCIPFL6, &fl) == -1) {
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perror("ioctl(SIOCIPFL6)");
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exit(1);
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}
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} else {
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if (ioctl(fd, SIOCIPFFL, &fl) == -1) {
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perror("ioctl(SIOCIPFFL)");
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exit(1);
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}
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}
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}
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if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
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printf("remove flags %s%s (%d)\n", (rem & FR_INQUE) ? "I" : "",
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(rem & FR_OUTQUE) ? "O" : "", rem);
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printf("removed %d filter rules\n", fl);
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}
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return;
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}
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static void swapactive()
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{
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int in = 2;
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if (opendevice(ipfname, 1) != -2 && ioctl(fd, SIOCSWAPA, &in) == -1)
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perror("ioctl(SIOCSWAPA)");
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else
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printf("Set %d now inactive\n", in);
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}
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void ipf_frsync()
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{
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int frsyn = 0;
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if (opendevice(ipfname, 1) != -2 && ioctl(fd, SIOCFRSYN, &frsyn) == -1)
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perror("SIOCFRSYN");
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else
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printf("filter sync'd\n");
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}
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void zerostats()
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{
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friostat_t fio;
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friostat_t *fiop = &fio;
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if (opendevice(ipfname, 1) != -2) {
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if (ioctl(fd, SIOCFRZST, &fiop) == -1) {
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perror("ioctl(SIOCFRZST)");
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exit(-1);
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}
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showstats(fiop);
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}
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}
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/*
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* read the kernel stats for packets blocked and passed
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*/
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static void showstats(fp)
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friostat_t *fp;
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{
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printf("bad packets:\t\tin %lu\tout %lu\n",
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fp->f_st[0].fr_bad, fp->f_st[1].fr_bad);
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printf(" input packets:\t\tblocked %lu passed %lu nomatch %lu",
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fp->f_st[0].fr_block, fp->f_st[0].fr_pass,
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fp->f_st[0].fr_nom);
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printf(" counted %lu\n", fp->f_st[0].fr_acct);
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printf("output packets:\t\tblocked %lu passed %lu nomatch %lu",
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fp->f_st[1].fr_block, fp->f_st[1].fr_pass,
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fp->f_st[1].fr_nom);
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printf(" counted %lu\n", fp->f_st[0].fr_acct);
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printf(" input packets logged:\tblocked %lu passed %lu\n",
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fp->f_st[0].fr_bpkl, fp->f_st[0].fr_ppkl);
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printf("output packets logged:\tblocked %lu passed %lu\n",
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fp->f_st[1].fr_bpkl, fp->f_st[1].fr_ppkl);
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printf(" packets logged:\tinput %lu-%lu output %lu-%lu\n",
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fp->f_st[0].fr_pkl, fp->f_st[0].fr_skip,
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fp->f_st[1].fr_pkl, fp->f_st[1].fr_skip);
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}
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static int showversion()
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{
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struct friostat fio;
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ipfobj_t ipfo;
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u_32_t flags;
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char *s;
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int vfd;
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bzero((caddr_t)&ipfo, sizeof(ipfo));
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ipfo.ipfo_rev = IPFILTER_VERSION;
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ipfo.ipfo_size = sizeof(fio);
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ipfo.ipfo_ptr = (void *)&fio;
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ipfo.ipfo_type = IPFOBJ_IPFSTAT;
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printf("ipf: %s (%d)\n", IPL_VERSION, (int)sizeof(frentry_t));
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if ((vfd = open(ipfname, O_RDONLY)) == -1) {
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perror("open device");
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return 1;
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}
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if (ioctl(vfd, SIOCGETFS, &ipfo)) {
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perror("ioctl(SIOCGETFS)");
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close(vfd);
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return 1;
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}
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close(vfd);
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flags = get_flags();
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printf("Kernel: %-*.*s\n", (int)sizeof(fio.f_version),
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(int)sizeof(fio.f_version), fio.f_version);
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printf("Running: %s\n", (fio.f_running > 0) ? "yes" : "no");
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printf("Log Flags: %#x = ", flags);
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s = "";
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if (flags & FF_LOGPASS) {
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printf("pass");
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s = ", ";
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}
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if (flags & FF_LOGBLOCK) {
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printf("%sblock", s);
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s = ", ";
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}
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if (flags & FF_LOGNOMATCH) {
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printf("%snomatch", s);
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s = ", ";
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}
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if (flags & FF_BLOCKNONIP) {
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printf("%snonip", s);
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s = ", ";
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}
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if (!*s)
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printf("none set");
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putchar('\n');
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printf("Default: ");
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if (FR_ISPASS(fio.f_defpass))
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s = "pass";
|
|
else if (FR_ISBLOCK(fio.f_defpass))
|
|
s = "block";
|
|
else
|
|
s = "nomatch -> block";
|
|
printf("%s all, Logging: %savailable\n", s, fio.f_logging ? "" : "un");
|
|
printf("Active list: %d\n", fio.f_active);
|
|
printf("Feature mask: %#x\n", fio.f_features);
|
|
|
|
return 0;
|
|
}
|