4 * Copyright (C) 2012 by Darren Reed.
6 * See the IPFILTER.LICENCE file for details on licencing.
10 #include <sys/ioctl.h>
14 static const char sccsid[] = "@(#)ipt.c 1.19 6/3/96 (C) 1993-2000 Darren Reed";
15 static const char rcsid[] = "@(#)$Id$";
19 extern struct ipread pcap, iptext, iphex;
20 extern struct ifnet *get_unit __P((char *, int));
21 extern void init_ifp __P((void));
22 extern ipnat_t *natparse __P((char *, int));
23 extern hostmap_t **ipf_hm_maptable;
24 extern hostmap_t *ipf_hm_maplist;
26 ipfmutex_t ipl_mutex, ipf_auth_mx, ipf_rw, ipf_stinsert;
27 ipfmutex_t ipf_nat_new, ipf_natio, ipf_timeoutlock;
28 ipfrwlock_t ipf_mutex, ipf_global, ipf_ipidfrag, ip_poolrw, ipf_frcache;
29 ipfrwlock_t ipf_frag, ipf_state, ipf_nat, ipf_natfrag, ipf_authlk;
30 ipfrwlock_t ipf_tokens;
31 int opts = OPT_DONTOPEN;
34 int pfil_delayed_copy = 0;
35 int main __P((int, char *[]));
36 int loadrules __P((char *, int));
37 int kmemcpy __P((char *, long, int));
38 int kstrncpy __P((char *, long, int n));
40 void dumpnat __P((void *));
41 void dumpgroups __P((ipf_main_softc_t *));
42 void dumprules __P((frentry_t *));
43 void drain_log __P((char *));
44 void fixv4sums __P((mb_t *, ip_t *));
46 #if defined(__NetBSD__) || defined(__OpenBSD__) || SOLARIS || \
47 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) || \
48 defined(__osf__) || defined(linux)
49 int ipftestioctl __P((int, ioctlcmd_t, ...));
50 int ipnattestioctl __P((int, ioctlcmd_t, ...));
51 int ipstatetestioctl __P((int, ioctlcmd_t, ...));
52 int ipauthtestioctl __P((int, ioctlcmd_t, ...));
53 int ipscantestioctl __P((int, ioctlcmd_t, ...));
54 int ipsynctestioctl __P((int, ioctlcmd_t, ...));
55 int ipooltestioctl __P((int, ioctlcmd_t, ...));
57 int ipftestioctl __P((dev_t, ioctlcmd_t, void *));
58 int ipnattestioctl __P((dev_t, ioctlcmd_t, void *));
59 int ipstatetestioctl __P((dev_t, ioctlcmd_t, void *));
60 int ipauthtestioctl __P((dev_t, ioctlcmd_t, void *));
61 int ipsynctestioctl __P((dev_t, ioctlcmd_t, void *));
62 int ipscantestioctl __P((dev_t, ioctlcmd_t, void *));
63 int ipooltestioctl __P((dev_t, ioctlcmd_t, void *));
66 static ioctlfunc_t iocfunctions[IPL_LOGSIZE] = { ipftestioctl,
74 static ipf_main_softc_t *softc = NULL;
82 char *datain, *iface, *ifname, *logout;
83 int fd, i, dir, c, loaded, dump, hlen;
106 softc = ipf_create_all(NULL);
110 if (ipf_init_all(softc) == -1)
114 if (ipftestioctl(IPL_LOGIPF, SIOCFRENB, &i) != 0)
117 while ((c = getopt(argc, argv, "6bCdDF:i:I:l:N:P:or:RS:T:vxX")) != -1)
124 fprintf(stderr, "IPv6 not supported\n");
141 if (strcasecmp(optarg, "pcap") == 0)
143 else if (strcasecmp(optarg, "hex") == 0)
145 else if (strcasecmp(optarg, "text") == 0)
158 if (ipnat_parsefile(-1, ipnat_addrule, ipnattestioctl,
168 if (ippool_parsefile(-1, optarg, ipooltestioctl) == -1)
173 if (ipf_parsefile(-1, ipf_addrule, iocfunctions,
179 sip.s_addr = inet_addr(optarg);
182 opts |= OPT_NORESOLVE;
185 ipf_dotuning(-1, optarg, ipftestioctl);
196 (void)fprintf(stderr,"no rules loaded\n");
200 if (opts & OPT_SAVEOUT)
204 fd = (*r->r_open)(datain);
206 fd = (*r->r_open)("-");
209 perror("error opening input");
213 m->m_data = (char *)m->mb_buf;
214 while ((i = (*r->r_readip)(m, &iface, &dir)) > 0) {
216 if ((iface == NULL) || (*iface == '\0'))
219 ip = MTOD(m, ip_t *);
220 ifp = get_unit(iface, IP_V(ip));
223 if ((r->r_flags & R_DO_CKSUM) || docksum)
225 hlen = IP_HL(ip) << 2;
227 dir = !(sip.s_addr == ip->ip_src.s_addr);
231 hlen = sizeof(ip6_t);
233 /* ipfr_slowtimer(); */
238 i = ipf_check(softc, ip, hlen, ifp, dir, &m);
239 if ((opts & OPT_NAT) == 0)
243 (void)printf("preauth");
246 (void)printf("account");
249 (void)printf("auth");
252 (void)printf("block");
255 (void)printf("pass");
259 (void)printf("bad-packet");
261 (void)printf("nomatch");
264 (void)printf("block return-rst");
267 (void)printf("block return-icmp");
270 (void)printf("block return-icmp-as-dest");
273 (void)printf("recognised return %#x\n", i);
277 if (!(opts & OPT_BRIEF)) {
282 printpacket(dir, &mb);
283 printf("--------------");
284 } else if ((opts & (OPT_BRIEF|OPT_NAT)) ==
285 (OPT_NAT|OPT_BRIEF)) {
289 PRINTF("%d\n", blockreason);
292 ipf_state_flush(softc, 1, 0);
294 if (dir && (ifp != NULL) && IP_V(ip) && (m != NULL))
295 #if defined(__sgi) && (IRIX < 60500)
296 (*ifp->if_output)(ifp, (void *)m, NULL);
299 (*ifp->if_output)(ifp, (void *)m, NULL, 0, 0);
301 (*ifp->if_output)(ifp, (void *)m, NULL, 0);
305 while ((m != NULL) && (m != &mb)) {
311 if ((opts & (OPT_BRIEF|OPT_NAT)) != (OPT_NAT|OPT_BRIEF))
314 if (iface != ifname) {
319 m->mb_data = (char *)m->mb_buf;
323 fprintf(stderr, "readip failed: %d\n", i);
326 if (logout != NULL) {
331 dumpnat(softc->ipf_nat_soft);
332 ipf_state_dump(softc, softc->ipf_state_soft);
333 ipf_lookup_dump(softc, softc->ipf_state_soft);
339 ipf_destroy_all(softc);
346 if (getenv("FINDLEAKS")) {
354 #if defined(__NetBSD__) || defined(__OpenBSD__) || SOLARIS || \
355 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) || \
356 defined(__osf__) || defined(linux)
357 int ipftestioctl(int dev, ioctlcmd_t cmd, ...)
363 dev = dev; /* gcc -Wextra */
365 data = va_arg(ap, caddr_t);
368 i = ipfioctl(softc, IPL_LOGIPF, cmd, data, FWRITE|FREAD);
369 if (opts & OPT_DEBUG)
370 fprintf(stderr, "ipfioctl(IPF,%#x,%p) = %d (%d)\n",
371 (u_int)cmd, data, i, softc->ipf_interror);
380 int ipnattestioctl(int dev, ioctlcmd_t cmd, ...)
386 dev = dev; /* gcc -Wextra */
388 data = va_arg(ap, caddr_t);
391 i = ipfioctl(softc, IPL_LOGNAT, cmd, data, FWRITE|FREAD);
392 if (opts & OPT_DEBUG)
393 fprintf(stderr, "ipfioctl(NAT,%#x,%p) = %d\n",
394 (u_int)cmd, data, i);
403 int ipstatetestioctl(int dev, ioctlcmd_t cmd, ...)
409 dev = dev; /* gcc -Wextra */
411 data = va_arg(ap, caddr_t);
414 i = ipfioctl(softc, IPL_LOGSTATE, cmd, data, FWRITE|FREAD);
415 if ((opts & OPT_DEBUG) || (i != 0))
416 fprintf(stderr, "ipfioctl(STATE,%#x,%p) = %d\n",
417 (u_int)cmd, data, i);
426 int ipauthtestioctl(int dev, ioctlcmd_t cmd, ...)
432 dev = dev; /* gcc -Wextra */
434 data = va_arg(ap, caddr_t);
437 i = ipfioctl(softc, IPL_LOGAUTH, cmd, data, FWRITE|FREAD);
438 if ((opts & OPT_DEBUG) || (i != 0))
439 fprintf(stderr, "ipfioctl(AUTH,%#x,%p) = %d\n",
440 (u_int)cmd, data, i);
449 int ipscantestioctl(int dev, ioctlcmd_t cmd, ...)
455 dev = dev; /* gcc -Wextra */
457 data = va_arg(ap, caddr_t);
460 i = ipfioctl(softc, IPL_LOGSCAN, cmd, data, FWRITE|FREAD);
461 if ((opts & OPT_DEBUG) || (i != 0))
462 fprintf(stderr, "ipfioctl(SCAN,%#x,%p) = %d\n",
463 (u_int)cmd, data, i);
472 int ipsynctestioctl(int dev, ioctlcmd_t cmd, ...)
478 dev = dev; /* gcc -Wextra */
480 data = va_arg(ap, caddr_t);
483 i = ipfioctl(softc, IPL_LOGSYNC, cmd, data, FWRITE|FREAD);
484 if ((opts & OPT_DEBUG) || (i != 0))
485 fprintf(stderr, "ipfioctl(SYNC,%#x,%p) = %d\n",
486 (u_int)cmd, data, i);
495 int ipooltestioctl(int dev, ioctlcmd_t cmd, ...)
501 dev = dev; /* gcc -Wextra */
503 data = va_arg(ap, caddr_t);
506 i = ipfioctl(softc, IPL_LOGLOOKUP, cmd, data, FWRITE|FREAD);
507 if ((opts & OPT_DEBUG) || (i != 0))
508 fprintf(stderr, "ipfioctl(POOL,%#x,%p) = %d (%d)\n",
509 (u_int)cmd, data, i, softc->ipf_interror);
517 int ipftestioctl(dev, cmd, data)
524 dev = dev; /* gcc -Wextra */
525 i = ipfioctl(softc, IPL_LOGIPF, cmd, data, FWRITE|FREAD);
526 if ((opts & OPT_DEBUG) || (i != 0))
527 fprintf(stderr, "ipfioctl(IPF,%#x,%p) = %d (%d)\n",
528 cmd, data, i, softc->ipf_interror);
537 int ipnattestioctl(dev, cmd, data)
544 dev = dev; /* gcc -Wextra */
545 i = ipfioctl(softc, IPL_LOGNAT, cmd, data, FWRITE|FREAD);
546 if ((opts & OPT_DEBUG) || (i != 0))
547 fprintf(stderr, "ipfioctl(NAT,%#x,%p) = %d\n", cmd, data, i);
556 int ipstatetestioctl(dev, cmd, data)
563 dev = dev; /* gcc -Wextra */
564 i = ipfioctl(softc, IPL_LOGSTATE, cmd, data, FWRITE|FREAD);
565 if ((opts & OPT_DEBUG) || (i != 0))
566 fprintf(stderr, "ipfioctl(STATE,%#x,%p) = %d\n", cmd, data, i);
575 int ipauthtestioctl(dev, cmd, data)
582 dev = dev; /* gcc -Wextra */
583 i = ipfioctl(softc, IPL_LOGAUTH, cmd, data, FWRITE|FREAD);
584 if ((opts & OPT_DEBUG) || (i != 0))
585 fprintf(stderr, "ipfioctl(AUTH,%#x,%p) = %d\n", cmd, data, i);
594 int ipsynctestioctl(dev, cmd, data)
601 dev = dev; /* gcc -Wextra */
602 i = ipfioctl(softc, IPL_LOGSYNC, cmd, data, FWRITE|FREAD);
603 if ((opts & OPT_DEBUG) || (i != 0))
604 fprintf(stderr, "ipfioctl(SYNC,%#x,%p) = %d\n", cmd, data, i);
613 int ipscantestioctl(dev, cmd, data)
620 dev = dev; /* gcc -Wextra */
621 i = ipfioctl(softc, IPL_LOGSCAN, cmd, data, FWRITE|FREAD);
622 if ((opts & OPT_DEBUG) || (i != 0))
623 fprintf(stderr, "ipfioctl(SCAN,%#x,%p) = %d\n", cmd, data, i);
632 int ipooltestioctl(dev, cmd, data)
639 dev = dev; /* gcc -Wextra */
640 i = ipfioctl(softc, IPL_LOGLOOKUP, cmd, data, FWRITE|FREAD);
641 if (opts & OPT_DEBUG)
642 fprintf(stderr, "ipfioctl(POOL,%#x,%p) = %d (%d)\n",
643 cmd, data, i, softc->ipf_interror);
653 int kmemcpy(addr, offset, size)
658 bcopy((char *)offset, addr, size);
663 int kstrncpy(buf, pos, n)
672 while ((n > 0) && (*buf++ = *ptr++))
679 * Display the built up NAT table rules and mapping entries.
684 ipf_nat_softc_t *softn = arg;
689 printf("List of active MAP/Redirect filters:\n");
690 for (ipn = softn->ipf_nat_list; ipn != NULL; ipn = ipn->in_next)
691 printnat(ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
692 printf("\nList of active sessions:\n");
693 for (nat = softn->ipf_nat_instances; nat; nat = nat->nat_next) {
694 printactivenat(nat, opts, 0);
696 printf("\tproxy active\n");
699 printf("\nHostmap table:\n");
700 for (hm = softn->ipf_hm_maplist; hm != NULL; hm = hm->hm_next)
701 printhostmap(hm, hm->hm_hv);
705 void dumpgroups(softc)
706 ipf_main_softc_t *softc;
711 printf("List of groups configured (set 0)\n");
712 for (i = 0; i < IPL_LOGSIZE; i++)
713 for (fg = softc->ipf_groups[i][0]; fg != NULL;
715 printf("Dev.%d. Group %s Ref %d Flags %#x\n",
716 i, fg->fg_name, fg->fg_ref, fg->fg_flags);
717 dumprules(fg->fg_start);
720 printf("List of groups configured (set 1)\n");
721 for (i = 0; i < IPL_LOGSIZE; i++)
722 for (fg = softc->ipf_groups[i][1]; fg != NULL;
724 printf("Dev.%d. Group %s Ref %d Flags %#x\n",
725 i, fg->fg_name, fg->fg_ref, fg->fg_flags);
726 dumprules(fg->fg_start);
729 printf("Rules configured (set 0, in)\n");
730 dumprules(softc->ipf_rules[0][0]);
731 printf("Rules configured (set 0, out)\n");
732 dumprules(softc->ipf_rules[1][0]);
733 printf("Rules configured (set 1, in)\n");
734 dumprules(softc->ipf_rules[0][1]);
735 printf("Rules configured (set 1, out)\n");
736 dumprules(softc->ipf_rules[1][1]);
738 printf("Accounting rules configured (set 0, in)\n");
739 dumprules(softc->ipf_acct[0][0]);
740 printf("Accounting rules configured (set 0, out)\n");
741 dumprules(softc->ipf_acct[0][1]);
742 printf("Accounting rules configured (set 1, in)\n");
743 dumprules(softc->ipf_acct[1][0]);
744 printf("Accounting rules configured (set 1, out)\n");
745 dumprules(softc->ipf_acct[1][1]);
748 void dumprules(rulehead)
753 for (fr = rulehead; fr != NULL; fr = fr->fr_next) {
755 printf("%"PRIu64" ",(unsigned long long)fr->fr_hits);
757 printf("%ld ", fr->fr_hits);
759 printfr(fr, ipftestioctl);
764 void drain_log(filename)
767 char buffer[DEFAULT_IPFLOGSIZE];
773 fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644);
775 perror("drain_log:open");
779 for (i = 0; i <= IPL_LOGMAX; i++)
781 bzero((char *)&iov, sizeof(iov));
782 iov.iov_base = buffer;
783 iov.iov_len = sizeof(buffer);
785 bzero((char *)&uio, sizeof(uio));
788 uio.uio_resid = iov.iov_len;
789 resid = uio.uio_resid;
791 if (ipf_log_read(softc, i, &uio) == 0) {
793 * If nothing was read then break out.
795 if (uio.uio_resid == resid)
797 write(fd, buffer, resid - uio.uio_resid);
806 void fixv4sums(m, ip)
810 u_char *csump, *hdr, p;
816 bzero((char *)&tmp, sizeof(tmp));
818 csump = (u_char *)ip;
821 ip->ip_sum = ipf_cksum((u_short *)ip, IP_HL(ip) << 2);
822 tmp.fin_hlen = IP_HL(ip) << 2;
823 csump += IP_HL(ip) << 2;
825 len = ntohs(ip->ip_len);
827 } else if (IP_V(ip) == 6) {
828 tmp.fin_hlen = sizeof(ip6_t);
829 csump += sizeof(ip6_t);
830 p = ((ip6_t *)ip)->ip6_nxt;
831 len = ntohs(((ip6_t *)ip)->ip6_plen);
832 len += sizeof(ip6_t);
836 tmp.fin_dlen = len - tmp.fin_hlen;
842 csump += offsetof(tcphdr_t, th_sum);
846 csump += offsetof(udphdr_t, uh_sum);
850 csump += offsetof(icmphdr_t, icmp_cksum);
864 *(u_short *)csump = fr_cksum(&tmp, ip, p, hdr);
869 ip_fillid(struct ip *ip)
871 static uint16_t ip_id;