2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 static struct option base_opts[] = {
23 { .name = "match", .has_arg = 1, .val = 'm' },
24 { .name = "jump", .has_arg = 1, .val = 'j' },
28 static struct xtables_globals xtg = {
30 .program_version = "4",
31 .orig_opts = base_opts,
34 static struct xtables_globals xtg6 = {
36 .program_version = "6",
37 .orig_opts = base_opts,
40 /* Required by certain extensions like SNAT and DNAT */
41 int kernel_version = 0;
44 get_kernel_version(void)
46 static struct utsname uts;
47 int x = 0, y = 0, z = 0;
49 if (uname(&uts) == -1)
50 sprintf(uts.release, "3.0.0");
52 sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
53 kernel_version = 0x10000 * x + 0x100 * y + z;
58 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init,
61 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init, libip6t_##x##_init,
64 static void fw3_init_extensions(void)
67 void (*initfuncs[])(void) = { FW3_IPT_MODULES };
69 for (i = 0; i < sizeof(initfuncs)/sizeof(initfuncs[0]); i++)
74 struct fw3_ipt_handle *
75 fw3_ipt_open(enum fw3_family family, enum fw3_table table)
77 struct fw3_ipt_handle *h;
79 h = fw3_alloc(sizeof(*h));
83 if (family == FW3_FAMILY_V6)
86 h->family = FW3_FAMILY_V6;
88 h->handle = ip6tc_init(fw3_flag_names[table]);
90 xtables_set_params(&xtg6);
91 xtables_set_nfproto(NFPROTO_IPV6);
96 h->family = FW3_FAMILY_V4;
98 h->handle = iptc_init(fw3_flag_names[table]);
100 xtables_set_params(&xtg);
101 xtables_set_nfproto(NFPROTO_IPV4);
111 fw3_init_extensions();
117 debug(struct fw3_ipt_handle *h, const char *fmt, ...)
121 printf("%s -t %s ", (h->family == FW3_FAMILY_V6) ? "ip6tables" : "iptables",
122 fw3_flag_names[h->table]);
130 fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
131 enum fw3_flag policy)
134 debug(h, "-P %s %s\n", chain, fw3_flag_names[policy]);
137 if (h->family == FW3_FAMILY_V6)
138 ip6tc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
141 iptc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
145 fw3_ipt_flush_chain(struct fw3_ipt_handle *h, const char *chain)
148 debug(h, "-F %s\n", chain);
151 if (h->family == FW3_FAMILY_V6)
152 ip6tc_flush_entries(chain, h->handle);
155 iptc_flush_entries(chain, h->handle);
159 delete_rules(struct fw3_ipt_handle *h, const char *target)
162 const struct ipt_entry *e;
168 if (h->family == FW3_FAMILY_V6)
170 for (chain = ip6tc_first_chain(h->handle);
172 chain = ip6tc_next_chain(h->handle))
177 const struct ip6t_entry *e6;
178 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
180 num++, e6 = ip6tc_next_rule(e6, h->handle))
182 t = ip6tc_get_target(e6, h->handle);
184 if (*t && !strcmp(t, target))
187 debug(h, "-D %s %u\n", chain, num + 1);
189 ip6tc_delete_num_entry(chain, num, h->handle);
200 for (chain = iptc_first_chain(h->handle);
202 chain = iptc_next_chain(h->handle))
207 for (num = 0, e = iptc_first_rule(chain, h->handle);
209 num++, e = iptc_next_rule(e, h->handle))
211 t = iptc_get_target(e, h->handle);
213 if (*t && !strcmp(t, target))
216 debug(h, "-D %s %u\n", chain, num + 1);
218 iptc_delete_num_entry(chain, num, h->handle);
229 fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain)
231 delete_rules(h, chain);
234 debug(h, "-X %s\n", chain);
237 if (h->family == FW3_FAMILY_V6)
238 ip6tc_delete_chain(chain, h->handle);
241 iptc_delete_chain(chain, h->handle);
245 fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...)
251 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
255 debug(h, "-N %s\n", buf);
257 iptc_create_chain(buf, h->handle);
261 fw3_ipt_flush(struct fw3_ipt_handle *h)
266 if (h->family == FW3_FAMILY_V6)
268 for (chain = ip6tc_first_chain(h->handle);
270 chain = ip6tc_next_chain(h->handle))
272 ip6tc_flush_entries(chain, h->handle);
275 for (chain = ip6tc_first_chain(h->handle);
277 chain = ip6tc_next_chain(h->handle))
279 ip6tc_delete_chain(chain, h->handle);
285 for (chain = iptc_first_chain(h->handle);
287 chain = iptc_next_chain(h->handle))
289 iptc_flush_entries(chain, h->handle);
292 for (chain = iptc_first_chain(h->handle);
294 chain = iptc_next_chain(h->handle))
296 iptc_delete_chain(chain, h->handle);
302 fw3_ipt_commit(struct fw3_ipt_handle *h)
307 if (h->family == FW3_FAMILY_V6)
309 rv = ip6tc_commit(h->handle);
311 warn("ip6tc_commit(): %s", ip6tc_strerror(errno));
316 rv = iptc_commit(h->handle);
318 warn("iptc_commit(): %s", iptc_strerror(errno));
323 fw3_ipt_close(struct fw3_ipt_handle *h)
330 dlclose(h->libv[h->libc]);
339 struct fw3_ipt_rule *
340 fw3_ipt_rule_new(struct fw3_ipt_handle *h)
342 struct fw3_ipt_rule *r;
344 r = fw3_alloc(sizeof(*r));
347 r->argv = fw3_alloc(sizeof(char *));
348 r->argv[r->argc++] = "fw3";
355 is_chain(struct fw3_ipt_handle *h, const char *name)
358 if (h->family == FW3_FAMILY_V6)
359 return ip6tc_is_chain(name, h->handle);
362 return iptc_is_chain(name, h->handle);
366 get_protoname(struct fw3_ipt_rule *r)
368 const struct xtables_pprot *pp;
371 for (pp = xtables_chain_protos; pp->name; pp++)
372 if (pp->num == r->protocol)
373 return (char *)pp->name;
379 load_extension(struct fw3_ipt_handle *h, const char *name)
383 const char *pfx = (h->family == FW3_FAMILY_V6) ? "libip6t" : "libipt";
385 snprintf(path, sizeof(path), "/usr/lib/iptables/libxt_%s.so", name);
386 if (!(lib = dlopen(path, RTLD_NOW)))
388 snprintf(path, sizeof(path), "/usr/lib/iptables/%s_%s.so", pfx, name);
389 lib = dlopen(path, RTLD_NOW);
395 tmp = realloc(h->libv, sizeof(lib) * (h->libc + 1));
401 h->libv[h->libc++] = lib;
406 static struct xtables_match *
407 find_match(struct fw3_ipt_rule *r, const char *name)
409 struct xtables_match *m;
411 m = xtables_find_match(name, XTF_DONT_LOAD, &r->matches);
413 if (!m && load_extension(r->h, name))
414 m = xtables_find_match(name, XTF_DONT_LOAD, &r->matches);
420 init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
423 struct xtables_globals *g;
428 s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
432 fw3_xt_set_match_name(m);
434 m->m->u.user.revision = m->revision;
435 m->m->u.match_size = s;
437 /* free previous userspace data */
438 fw3_xt_free_match_udata(m);
443 /* don't merge options if no_clone is set and this match is a clone */
444 if (no_clone && (m == m->next))
447 /* merge option table */
448 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
449 fw3_xt_merge_match_options(g, m);
453 need_protomatch(struct fw3_ipt_rule *r, const char *pname)
458 if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
461 return !r->protocol_loaded;
464 static struct xtables_match *
465 load_protomatch(struct fw3_ipt_rule *r)
467 const char *pname = get_protoname(r);
469 if (!need_protomatch(r, pname))
472 return find_match(r, pname);
475 static struct xtables_target *
476 find_target(struct fw3_ipt_rule *r, const char *name)
478 struct xtables_target *t;
480 if (is_chain(r->h, name))
481 return xtables_find_target(XT_STANDARD_TARGET, XTF_LOAD_MUST_SUCCEED);
483 t = xtables_find_target(name, XTF_DONT_LOAD);
485 if (!t && load_extension(r->h, name))
486 t = xtables_find_target(name, XTF_DONT_LOAD);
491 static struct xtables_target *
492 get_target(struct fw3_ipt_rule *r, const char *name)
495 struct xtables_target *t;
496 struct xtables_globals *g;
498 t = find_target(r, name);
503 s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
506 fw3_xt_set_target_name(t, name);
508 t->t->u.user.revision = t->revision;
509 t->t->u.target_size = s;
511 /* free previous userspace data */
512 fw3_xt_free_target_udata(t);
517 /* merge option table */
518 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
519 fw3_xt_merge_target_options(g, t);
527 fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
531 if (!proto || proto->any)
534 pr = proto->protocol;
537 if (r->h->family == FW3_FAMILY_V6)
542 r->e6.ipv6.proto = pr;
543 r->e6.ipv6.flags |= IP6T_F_PROTO;
546 r->e6.ipv6.invflags |= XT_INV_PROTO;
554 r->e.ip.invflags |= XT_INV_PROTO;
561 fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
562 struct fw3_device *in, struct fw3_device *out)
565 if (r->h->family == FW3_FAMILY_V6)
569 xtables_parse_interface(in->name, r->e6.ipv6.iniface,
570 r->e6.ipv6.iniface_mask);
573 r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
576 if (out && !out->any)
578 xtables_parse_interface(out->name, r->e6.ipv6.outiface,
579 r->e6.ipv6.outiface_mask);
582 r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
590 xtables_parse_interface(in->name, r->e.ip.iniface,
591 r->e.ip.iniface_mask);
594 r->e.ip.invflags |= IPT_INV_VIA_IN;
597 if (out && !out->any)
599 xtables_parse_interface(out->name, r->e.ip.outiface,
600 r->e.ip.outiface_mask);
603 r->e.ip.invflags |= IPT_INV_VIA_OUT;
610 ip4prefix2mask(int prefix, struct in_addr *mask)
613 mask->s_addr = htonl(~((1 << (32 - prefix)) - 1));
620 ip6prefix2mask(int prefix, struct in6_addr *mask)
622 char *p = (char *)mask;
626 memset(p, 0xff, prefix / 8);
627 memset(p + (prefix / 8) + 1, 0, (128 - prefix) / 8);
628 p[prefix / 8] = 0xff << (8 - (prefix & 7));
632 memset(mask, 0, sizeof(*mask));
638 fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
639 struct fw3_address *src, struct fw3_address *dest)
641 if ((src && src->range) || (dest && dest->range))
643 fw3_ipt_rule_addarg(r, false, "-m", "iprange");
650 fw3_ipt_rule_addarg(r, src->invert, "--src-range",
651 fw3_address_to_string(src, false));
654 else if (r->h->family == FW3_FAMILY_V6)
656 r->e6.ipv6.src = src->address.v6;
657 ip6prefix2mask(src->mask, &r->e6.ipv6.smsk);
660 for (i = 0; i < 4; i++)
661 r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
664 r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
669 r->e.ip.src = src->address.v4;
670 ip4prefix2mask(src->mask, &r->e.ip.smsk);
672 r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
675 r->e.ip.invflags |= IPT_INV_SRCIP;
679 if (dest && dest->set)
683 fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
684 fw3_address_to_string(dest, false));
687 else if (r->h->family == FW3_FAMILY_V6)
689 r->e6.ipv6.dst = dest->address.v6;
690 ip6prefix2mask(dest->mask, &r->e6.ipv6.dmsk);
693 for (i = 0; i < 4; i++)
694 r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
697 r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
702 r->e.ip.dst = dest->address.v4;
703 ip4prefix2mask(dest->mask, &r->e.ip.dmsk);
705 r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
708 r->e.ip.invflags |= IPT_INV_DSTIP;
714 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
715 struct fw3_port *sp, struct fw3_port *dp)
717 char buf[sizeof("65535:65535\0")];
719 if ((!sp || !sp->set) && (!dp || !dp->set))
722 if (!get_protoname(r))
727 if (sp->port_min == sp->port_max)
728 sprintf(buf, "%u", sp->port_min);
730 sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
732 fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
737 if (dp->port_min == dp->port_max)
738 sprintf(buf, "%u", dp->port_min);
740 sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
742 fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
747 fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out)
750 struct fw3_device dev = { .any = false };
751 strncpy(dev.name, device, sizeof(dev.name) - 1);
752 fw3_ipt_rule_in_out(r, (out) ? NULL : &dev, (out) ? &dev : NULL);
757 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
759 char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
760 uint8_t *addr = mac->mac.ether_addr_octet;
765 sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
766 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
768 fw3_ipt_rule_addarg(r, false, "-m", "mac");
769 fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", buf);
773 fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
775 char buf[sizeof("255/255\0")];
781 if (r->h->family == FW3_FAMILY_V6)
783 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
784 sprintf(buf, "%u", icmp->type6);
786 sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
788 fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
793 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
794 sprintf(buf, "%u", icmp->type);
796 sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
798 fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
803 fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
805 char buf[sizeof("-4294967296/second\0")];
807 if (!limit || limit->rate <= 0)
810 fw3_ipt_rule_addarg(r, false, "-m", "limit");
812 sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
813 fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
815 if (limit->burst > 0)
817 sprintf(buf, "%u", limit->burst);
818 fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
823 fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_setmatch *match)
825 char buf[sizeof("dst,dst,dst\0")];
829 struct fw3_ipset *set;
830 struct fw3_ipset_datatype *type;
832 if (!match || !match->set || !match->ptr)
836 list_for_each_entry(type, &set->datatypes, list)
844 p += sprintf(p, "%s", match->dir[i] ? match->dir[i] : type->dir);
848 fw3_ipt_rule_addarg(r, false, "-m", "set");
850 fw3_ipt_rule_addarg(r, match->invert, "--match-set",
851 set->external ? set->external : set->name);
853 fw3_ipt_rule_addarg(r, false, buf, NULL);
857 fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
860 struct tm empty = { 0 };
862 char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
865 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
866 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
868 if (!d1 && !d2 && !time->timestart && !time->timestop &&
869 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
874 fw3_ipt_rule_addarg(r, false, "-m", "time");
877 fw3_ipt_rule_addarg(r, false, "--utc", NULL);
881 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
882 fw3_ipt_rule_addarg(r, false, "--datestart", buf);
887 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
888 fw3_ipt_rule_addarg(r, false, "--datestop", buf);
893 sprintf(buf, "%02d:%02d:%02d",
894 time->timestart / 3600,
895 time->timestart % 3600 / 60,
896 time->timestart % 60);
898 fw3_ipt_rule_addarg(r, false, "--timestart", buf);
903 sprintf(buf, "%02d:%02d:%02d",
904 time->timestop / 3600,
905 time->timestop % 3600 / 60,
906 time->timestop % 60);
908 fw3_ipt_rule_addarg(r, false, "--timestop", buf);
911 if (time->monthdays & 0xFFFFFFFE)
913 for (i = 1, p = buf; i < 32; i++)
915 if (hasbit(time->monthdays, i))
920 p += sprintf(p, "%u", i);
924 fw3_ipt_rule_addarg(r, hasbit(time->monthdays, 0), "--monthdays", buf);
927 if (time->weekdays & 0xFE)
929 for (i = 1, p = buf; i < 8; i++)
931 if (hasbit(time->weekdays, i))
936 p += sprintf(p, "%u", i);
940 fw3_ipt_rule_addarg(r, hasbit(time->weekdays, 0), "--weekdays", buf);
945 fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
947 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
949 if (!mark || !mark->set)
952 if (mark->mask < 0xFFFFFFFF)
953 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
955 sprintf(buf, "0x%x", mark->mark);
957 fw3_ipt_rule_addarg(r, false, "-m", "mark");
958 fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
962 fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
971 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
974 fw3_ipt_rule_addarg(r, false, "-m", "comment");
975 fw3_ipt_rule_addarg(r, false, "--comment", buf);
979 fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
983 if (!extra || !*extra)
986 s = fw3_strdup(extra);
988 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
990 tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
996 r->argv[r->argc++] = fw3_strdup(p);
1002 #ifndef DISABLE_IPV6
1004 rule_print6(struct ip6t_entry *e)
1006 char buf[INET6_ADDRSTRLEN];
1009 if (e->ipv6.flags & IP6T_F_PROTO)
1011 if (e->ipv6.flags & XT_INV_PROTO)
1014 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
1017 printf(" -p %s", pname);
1019 printf(" -p %u", e->ipv6.proto);
1022 if (e->ipv6.iniface[0])
1024 if (e->ipv6.flags & IP6T_INV_VIA_IN)
1027 printf(" -i %s", e->ipv6.iniface);
1030 if (e->ipv6.outiface[0])
1032 if (e->ipv6.flags & IP6T_INV_VIA_OUT)
1035 printf(" -o %s", e->ipv6.outiface);
1038 if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
1040 if (e->ipv6.flags & IP6T_INV_SRCIP)
1043 printf(" -s %s/%u", inet_ntop(AF_INET6, &e->ipv6.src, buf, sizeof(buf)),
1044 xtables_ip6mask_to_cidr(&e->ipv6.smsk));
1047 if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
1049 if (e->ipv6.flags & IP6T_INV_DSTIP)
1052 printf(" -d %s/%u", inet_ntop(AF_INET6, &e->ipv6.dst, buf, sizeof(buf)),
1053 xtables_ip6mask_to_cidr(&e->ipv6.dmsk));
1059 rule_print4(struct ipt_entry *e)
1061 struct in_addr in_zero = { 0 };
1062 char buf[sizeof("255.255.255.255\0")];
1067 if (e->ip.flags & XT_INV_PROTO)
1070 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
1073 printf(" -p %s", pname);
1075 printf(" -p %u", e->ip.proto);
1078 if (e->ip.iniface[0])
1080 if (e->ip.flags & IPT_INV_VIA_IN)
1083 printf(" -i %s", e->ip.iniface);
1086 if (e->ip.outiface[0])
1088 if (e->ip.flags & IPT_INV_VIA_OUT)
1091 printf(" -o %s", e->ip.outiface);
1094 if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
1096 if (e->ip.flags & IPT_INV_SRCIP)
1099 printf(" -s %s/%u", inet_ntop(AF_INET, &e->ip.src, buf, sizeof(buf)),
1100 xtables_ipmask_to_cidr(&e->ip.smsk));
1103 if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
1105 if (e->ip.flags & IPT_INV_DSTIP)
1108 printf(" -d %s/%u", inet_ntop(AF_INET, &e->ip.dst, buf, sizeof(buf)),
1109 xtables_ipmask_to_cidr(&e->ip.dmsk));
1114 rule_print(struct fw3_ipt_rule *r, const char *prefix, const char *chain)
1116 debug(r->h, "%s %s", prefix, chain);
1118 #ifndef DISABLE_IPV6
1119 if (r->h->family == FW3_FAMILY_V6)
1120 rule_print6(&r->e6);
1125 fw3_xt_print_matches(&r->e.ip, r->matches);
1126 fw3_xt_print_target(&r->e.ip, r->target);
1132 parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
1134 struct xtables_rule_match *m;
1135 struct xtables_match *em;
1137 /* is a target option */
1138 if (r->target && fw3_xt_has_target_parse(r->target) &&
1139 optc >= r->target->option_offset &&
1140 optc < (r->target->option_offset + 256))
1142 xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
1146 /* try to dispatch argument to one of the match parsers */
1147 for (m = r->matches; m; m = m->next)
1151 if (m->completed || !fw3_xt_has_match_parse(em))
1154 if (optc < em->option_offset ||
1155 optc >= (em->option_offset + 256))
1158 xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
1162 /* unhandled option, might belong to a protocol match */
1163 if ((em = load_protomatch(r)) != NULL)
1165 init_match(r, em, false);
1167 r->protocol_loaded = true;
1174 warn("parse_option(): option '%s' needs argument", r->argv[optind-1]);
1177 warn("parse_option(): unknown option '%s'", r->argv[optind-1]);
1183 fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
1184 const char *k, const char *v)
1192 n = inv + !!k + !!v;
1193 tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
1201 r->argv[r->argc++] = fw3_strdup("!");
1203 r->argv[r->argc++] = fw3_strdup(k);
1206 r->argv[r->argc++] = fw3_strdup(v);
1209 static unsigned char *
1210 rule_mask(struct fw3_ipt_rule *r)
1213 unsigned char *p, *mask = NULL;
1214 struct xtables_rule_match *m;
1216 #define SZ(x) XT_ALIGN(sizeof(struct x))
1218 #ifndef DISABLE_IPV6
1219 if (r->h->family == FW3_FAMILY_V6)
1223 for (m = r->matches; m; m = m->next)
1224 s += SZ(ip6t_entry_match) + m->match->size;
1226 s += SZ(ip6t_entry_target) + r->target->size;
1228 mask = fw3_alloc(s);
1229 memset(mask, 0xFF, SZ(ip6t_entry));
1230 p = mask + SZ(ip6t_entry);
1232 for (m = r->matches; m; m = m->next)
1234 memset(p, 0xFF, SZ(ip6t_entry_match) + m->match->userspacesize);
1235 p += SZ(ip6t_entry_match) + m->match->size;
1238 memset(p, 0xFF, SZ(ip6t_entry_target) + r->target->userspacesize);
1245 for (m = r->matches; m; m = m->next)
1246 s += SZ(ipt_entry_match) + m->match->size;
1248 s += SZ(ipt_entry_target) + r->target->size;
1250 mask = fw3_alloc(s);
1251 memset(mask, 0xFF, SZ(ipt_entry));
1252 p = mask + SZ(ipt_entry);
1254 for (m = r->matches; m; m = m->next)
1256 memset(p, 0xFF, SZ(ipt_entry_match) + m->match->userspacesize);
1257 p += SZ(ipt_entry_match) + m->match->size;
1260 memset(p, 0xFF, SZ(ipt_entry_target) + r->target->userspacesize);
1267 rule_build(struct fw3_ipt_rule *r)
1270 struct xtables_rule_match *m;
1272 #ifndef DISABLE_IPV6
1273 if (r->h->family == FW3_FAMILY_V6)
1275 struct ip6t_entry *e6;
1277 s = XT_ALIGN(sizeof(struct ip6t_entry));
1279 for (m = r->matches; m; m = m->next)
1280 s += m->match->m->u.match_size;
1282 e6 = fw3_alloc(s + r->target->t->u.target_size);
1284 memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
1286 e6->target_offset = s;
1287 e6->next_offset = s + r->target->t->u.target_size;
1291 for (m = r->matches; m; m = m->next)
1293 memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
1294 s += m->match->m->u.match_size;
1297 memcpy(e6->elems + s, r->target->t, r->target->t->u.target_size);
1304 struct ipt_entry *e;
1306 s = XT_ALIGN(sizeof(struct ipt_entry));
1308 for (m = r->matches; m; m = m->next)
1309 s += m->match->m->u.match_size;
1311 e = fw3_alloc(s + r->target->t->u.target_size);
1313 memcpy(e, &r->e, sizeof(struct ipt_entry));
1315 e->target_offset = s;
1316 e->next_offset = s + r->target->t->u.target_size;
1320 for (m = r->matches; m; m = m->next)
1322 memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
1323 s += m->match->m->u.match_size;
1326 memcpy(e->elems + s, r->target->t, r->target->t->u.target_size);
1333 __fw3_ipt_rule_append(struct fw3_ipt_rule *r, bool repl, const char *fmt, ...)
1336 unsigned char *mask;
1338 struct xtables_rule_match *m;
1339 struct xtables_match *em;
1340 struct xtables_target *et;
1341 struct xtables_globals *g;
1349 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1352 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
1353 g->opts = g->orig_opts;
1358 while ((optc = getopt_long(r->argc, r->argv, "-:m:j:", g->opts,
1364 em = find_match(r, optarg);
1368 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg);
1372 init_match(r, em, true);
1376 et = get_target(r, optarg);
1380 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg);
1387 if ((optarg[0] == '!') && (optarg[1] == '\0'))
1394 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg);
1398 if (parse_option(r, optc, inv))
1406 for (m = r->matches; m; m = m->next)
1407 xtables_option_mfcall(m->match);
1410 xtables_option_tfcall(r->target);
1412 rule = rule_build(r);
1414 #ifndef DISABLE_IPV6
1415 if (r->h->family == FW3_FAMILY_V6)
1419 mask = rule_mask(r);
1421 while (ip6tc_delete_entry(buf, rule, mask, r->h->handle))
1423 rule_print(r, "-D", buf);
1429 rule_print(r, "-A", buf);
1431 if (!ip6tc_append_entry(buf, rule, r->h->handle))
1432 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno));
1439 mask = rule_mask(r);
1441 while (iptc_delete_entry(buf, rule, mask, r->h->handle))
1443 rule_print(r, "-D", buf);
1449 rule_print(r, "-A", buf);
1451 if (!iptc_append_entry(buf, rule, r->h->handle))
1452 warn("iptc_append_entry(): %s\n", iptc_strerror(errno));
1458 for (i = 1; i < r->argc; i++)
1463 xtables_rule_matches_free(&r->matches);
1470 /* reset all targets and matches */
1471 for (em = xtables_matches; em; em = em->next)
1474 for (et = xtables_targets; et; et = et->next)
1480 xtables_free_opts(1);
1483 struct fw3_ipt_rule *
1484 fw3_ipt_rule_create(struct fw3_ipt_handle *handle, struct fw3_protocol *proto,
1485 struct fw3_device *in, struct fw3_device *out,
1486 struct fw3_address *src, struct fw3_address *dest)
1488 struct fw3_ipt_rule *r;
1490 r = fw3_ipt_rule_new(handle);
1492 fw3_ipt_rule_proto(r, proto);
1493 fw3_ipt_rule_in_out(r, in, out);
1494 fw3_ipt_rule_src_dest(r, src, dest);