2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jo@mein.io>
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,
43 struct xtables_match **matches;
44 struct xtables_target **targets;
45 void (*register_match)(struct xtables_match *);
46 void (*register_target)(struct xtables_target *);
50 /* Required by certain extensions like SNAT and DNAT */
51 int kernel_version = 0;
54 get_kernel_version(void)
56 static struct utsname uts;
57 int x = 0, y = 0, z = 0;
59 if (uname(&uts) == -1)
60 sprintf(uts.release, "3.0.0");
62 sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
63 kernel_version = 0x10000 * x + 0x100 * y + z;
66 static void fw3_init_extensions(void)
76 struct fw3_ipt_handle *
77 fw3_ipt_open(enum fw3_family family, enum fw3_table table)
80 struct fw3_ipt_handle *h;
82 h = fw3_alloc(sizeof(*h));
86 if (family == FW3_FAMILY_V6)
89 h->family = FW3_FAMILY_V6;
91 h->handle = ip6tc_init(fw3_flag_names[table]);
93 xtables_set_params(&xtg6);
94 xtables_set_nfproto(NFPROTO_IPV6);
99 h->family = FW3_FAMILY_V4;
101 h->handle = iptc_init(fw3_flag_names[table]);
103 xtables_set_params(&xtg);
104 xtables_set_nfproto(NFPROTO_IPV4);
114 fw3_init_extensions();
116 if (xext.register_match)
117 for (i = 0; i < xext.mcount; i++)
118 xext.register_match(xext.matches[i]);
120 if (xext.register_target)
121 for (i = 0; i < xext.tcount; i++)
122 xext.register_target(xext.targets[i]);
128 debug(struct fw3_ipt_handle *h, const char *fmt, ...)
132 printf("%s -t %s ", (h->family == FW3_FAMILY_V6) ? "ip6tables" : "iptables",
133 fw3_flag_names[h->table]);
141 fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
142 enum fw3_flag policy)
145 debug(h, "-P %s %s\n", chain, fw3_flag_names[policy]);
148 if (h->family == FW3_FAMILY_V6)
149 ip6tc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
152 iptc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
156 fw3_ipt_flush_chain(struct fw3_ipt_handle *h, const char *chain)
159 debug(h, "-F %s\n", chain);
162 if (h->family == FW3_FAMILY_V6)
163 ip6tc_flush_entries(chain, h->handle);
166 iptc_flush_entries(chain, h->handle);
170 delete_rules(struct fw3_ipt_handle *h, const char *target)
173 const struct ipt_entry *e;
179 if (h->family == FW3_FAMILY_V6)
181 for (chain = ip6tc_first_chain(h->handle);
183 chain = ip6tc_next_chain(h->handle))
188 const struct ip6t_entry *e6;
189 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
191 num++, e6 = ip6tc_next_rule(e6, h->handle))
193 t = ip6tc_get_target(e6, h->handle);
195 if (*t && !strcmp(t, target))
198 debug(h, "-D %s %u\n", chain, num + 1);
200 ip6tc_delete_num_entry(chain, num, h->handle);
211 for (chain = iptc_first_chain(h->handle);
213 chain = iptc_next_chain(h->handle))
218 for (num = 0, e = iptc_first_rule(chain, h->handle);
220 num++, e = iptc_next_rule(e, h->handle))
222 t = iptc_get_target(e, h->handle);
224 if (*t && !strcmp(t, target))
227 debug(h, "-D %s %u\n", chain, num + 1);
229 iptc_delete_num_entry(chain, num, h->handle);
240 fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain)
242 delete_rules(h, chain);
245 debug(h, "-X %s\n", chain);
248 if (h->family == FW3_FAMILY_V6)
249 ip6tc_delete_chain(chain, h->handle);
252 iptc_delete_chain(chain, h->handle);
256 get_rule_id(const void *base, unsigned int start, unsigned int end)
260 const struct xt_entry_match *em;
262 for (i = start; i < end; i += em->u.match_size)
266 if (strcmp(em->u.user.name, "id"))
269 memcpy(&id, em->data, sizeof(id));
271 if ((id & FW3_ID_MASK) != FW3_ID_MAGIC)
274 return (id & ~FW3_ID_MASK);
281 fw3_ipt_delete_id_rules(struct fw3_ipt_handle *h, const char *chain)
284 const struct ipt_entry *e;
289 if (h->family == FW3_FAMILY_V6)
291 if (!ip6tc_is_chain(chain, h->handle))
297 const struct ip6t_entry *e6;
298 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
300 num++, e6 = ip6tc_next_rule(e6, h->handle))
302 id = get_rule_id(e6, sizeof(*e6), e6->target_offset);
307 debug(h, "-D %s %u\n", chain, num + 1);
309 ip6tc_delete_num_entry(chain, num, h->handle);
319 if (!iptc_is_chain(chain, h->handle))
325 for (num = 0, e = iptc_first_rule(chain, h->handle);
327 num++, e = iptc_next_rule(e, h->handle))
329 id = get_rule_id(e, sizeof(*e), e->target_offset);
334 debug(h, "-D %s %u\n", chain, num + 1);
336 iptc_delete_num_entry(chain, num, h->handle);
346 fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...)
352 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
356 debug(h, "-N %s\n", buf);
358 iptc_create_chain(buf, h->handle);
362 fw3_ipt_flush(struct fw3_ipt_handle *h)
367 if (h->family == FW3_FAMILY_V6)
369 for (chain = ip6tc_first_chain(h->handle);
371 chain = ip6tc_next_chain(h->handle))
373 ip6tc_flush_entries(chain, h->handle);
376 for (chain = ip6tc_first_chain(h->handle);
378 chain = ip6tc_next_chain(h->handle))
380 ip6tc_delete_chain(chain, h->handle);
386 for (chain = iptc_first_chain(h->handle);
388 chain = iptc_next_chain(h->handle))
390 iptc_flush_entries(chain, h->handle);
393 for (chain = iptc_first_chain(h->handle);
395 chain = iptc_next_chain(h->handle))
397 iptc_delete_chain(chain, h->handle);
403 chain_is_empty(struct fw3_ipt_handle *h, const char *chain)
406 if (h->family == FW3_FAMILY_V6)
407 return (!ip6tc_builtin(chain, h->handle) &&
408 !ip6tc_first_rule(chain, h->handle));
411 return (!iptc_builtin(chain, h->handle) &&
412 !iptc_first_rule(chain, h->handle));
416 fw3_ipt_gc(struct fw3_ipt_handle *h)
422 if (h->family == FW3_FAMILY_V6)
427 for (chain = ip6tc_first_chain(h->handle);
429 chain = ip6tc_next_chain(h->handle))
431 if (!chain_is_empty(h, chain))
434 fw3_ipt_delete_chain(h, chain);
446 for (chain = iptc_first_chain(h->handle);
448 chain = iptc_next_chain(h->handle))
450 warn("C=%s\n", chain);
452 if (!chain_is_empty(h, chain))
455 warn("D=%s\n", chain);
457 fw3_ipt_delete_chain(h, chain);
466 fw3_ipt_commit(struct fw3_ipt_handle *h)
471 if (h->family == FW3_FAMILY_V6)
473 rv = ip6tc_commit(h->handle);
475 warn("ip6tc_commit(): %s", ip6tc_strerror(errno));
480 rv = iptc_commit(h->handle);
482 warn("iptc_commit(): %s", iptc_strerror(errno));
487 fw3_ipt_close(struct fw3_ipt_handle *h)
492 struct fw3_ipt_rule *
493 fw3_ipt_rule_new(struct fw3_ipt_handle *h)
495 struct fw3_ipt_rule *r;
497 r = fw3_alloc(sizeof(*r));
501 r->argv = fw3_alloc(sizeof(char *));
502 r->argv[r->argc++] = "fw3";
509 is_chain(struct fw3_ipt_handle *h, const char *name)
512 if (h->family == FW3_FAMILY_V6)
513 return ip6tc_is_chain(name, h->handle);
516 return iptc_is_chain(name, h->handle);
520 get_protoname(struct fw3_ipt_rule *r)
522 const struct xtables_pprot *pp;
525 for (pp = xtables_chain_protos; pp->name; pp++)
526 if (pp->num == r->protocol)
527 return (char *)pp->name;
533 load_extension(struct fw3_ipt_handle *h, const char *name)
537 const char *pfx = (h->family == FW3_FAMILY_V6) ? "libip6t" : "libipt";
541 snprintf(path, sizeof(path), "/usr/lib/iptables/libxt_%s.so", name);
542 if (!(lib = dlopen(path, RTLD_NOW)))
544 snprintf(path, sizeof(path), "/usr/lib/iptables/%s_%s.so", pfx, name);
545 lib = dlopen(path, RTLD_NOW);
553 static struct xtables_match *
554 find_match(struct fw3_ipt_rule *r, const char *name)
556 struct xtables_match *m;
558 m = xtables_find_match(name, XTF_DONT_LOAD, &r->matches);
560 if (!m && load_extension(r->h, name))
561 m = xtables_find_match(name, XTF_DONT_LOAD, &r->matches);
567 init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
570 struct xtables_globals *g;
575 s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
579 fw3_xt_set_match_name(m);
581 m->m->u.user.revision = m->revision;
582 m->m->u.match_size = s;
584 /* free previous userspace data */
585 fw3_xt_free_match_udata(m);
590 /* don't merge options if no_clone is set and this match is a clone */
591 if (no_clone && (m == m->next))
594 /* merge option table */
595 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
596 fw3_xt_merge_match_options(g, m);
600 need_protomatch(struct fw3_ipt_rule *r, const char *pname)
605 if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
608 return !r->protocol_loaded;
611 static struct xtables_match *
612 load_protomatch(struct fw3_ipt_rule *r)
614 const char *pname = get_protoname(r);
616 if (!need_protomatch(r, pname))
619 return find_match(r, pname);
622 static struct xtables_target *
623 find_target(struct fw3_ipt_rule *r, const char *name)
625 struct xtables_target *t;
627 if (is_chain(r->h, name))
628 return xtables_find_target(XT_STANDARD_TARGET, XTF_LOAD_MUST_SUCCEED);
630 t = xtables_find_target(name, XTF_DONT_LOAD);
632 if (!t && load_extension(r->h, name))
633 t = xtables_find_target(name, XTF_DONT_LOAD);
638 static struct xtables_target *
639 get_target(struct fw3_ipt_rule *r, const char *name)
642 struct xtables_target *t;
643 struct xtables_globals *g;
645 t = find_target(r, name);
650 s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
653 fw3_xt_set_target_name(t, name);
655 t->t->u.user.revision = t->revision;
656 t->t->u.target_size = s;
658 /* free previous userspace data */
659 fw3_xt_free_target_udata(t);
664 /* merge option table */
665 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
666 fw3_xt_merge_target_options(g, t);
674 fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
678 if (!proto || proto->any)
681 pr = proto->protocol;
684 if (r->h->family == FW3_FAMILY_V6)
689 r->e6.ipv6.proto = pr;
690 r->e6.ipv6.flags |= IP6T_F_PROTO;
693 r->e6.ipv6.invflags |= XT_INV_PROTO;
701 r->e.ip.invflags |= XT_INV_PROTO;
708 fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
709 struct fw3_device *in, struct fw3_device *out)
712 if (r->h->family == FW3_FAMILY_V6)
716 xtables_parse_interface(in->name, r->e6.ipv6.iniface,
717 r->e6.ipv6.iniface_mask);
720 r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
723 if (out && !out->any)
725 xtables_parse_interface(out->name, r->e6.ipv6.outiface,
726 r->e6.ipv6.outiface_mask);
729 r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
737 xtables_parse_interface(in->name, r->e.ip.iniface,
738 r->e.ip.iniface_mask);
741 r->e.ip.invflags |= IPT_INV_VIA_IN;
744 if (out && !out->any)
746 xtables_parse_interface(out->name, r->e.ip.outiface,
747 r->e.ip.outiface_mask);
750 r->e.ip.invflags |= IPT_INV_VIA_OUT;
757 fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
758 struct fw3_address *src, struct fw3_address *dest)
760 if ((src && src->range) || (dest && dest->range))
762 fw3_ipt_rule_addarg(r, false, "-m", "iprange");
769 fw3_ipt_rule_addarg(r, src->invert, "--src-range",
770 fw3_address_to_string(src, false, false));
773 else if (r->h->family == FW3_FAMILY_V6)
775 r->e6.ipv6.src = src->address.v6;
776 r->e6.ipv6.smsk = src->mask.v6;
779 for (i = 0; i < 4; i++)
780 r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
783 r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
788 r->e.ip.src = src->address.v4;
789 r->e.ip.smsk = src->mask.v4;
791 r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
794 r->e.ip.invflags |= IPT_INV_SRCIP;
798 if (dest && dest->set)
802 fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
803 fw3_address_to_string(dest, false, false));
806 else if (r->h->family == FW3_FAMILY_V6)
808 r->e6.ipv6.dst = dest->address.v6;
809 r->e6.ipv6.dmsk = dest->mask.v6;
812 for (i = 0; i < 4; i++)
813 r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
816 r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
821 r->e.ip.dst = dest->address.v4;
822 r->e.ip.dmsk = dest->mask.v4;
824 r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
827 r->e.ip.invflags |= IPT_INV_DSTIP;
833 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
834 struct fw3_port *sp, struct fw3_port *dp)
836 char buf[sizeof("65535:65535\0")];
838 if ((!sp || !sp->set) && (!dp || !dp->set))
841 if (!get_protoname(r))
846 if (sp->port_min == sp->port_max)
847 sprintf(buf, "%u", sp->port_min);
849 sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
851 fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
856 if (dp->port_min == dp->port_max)
857 sprintf(buf, "%u", dp->port_min);
859 sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
861 fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
866 fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out)
869 struct fw3_device dev = { .any = false };
870 strncpy(dev.name, device, sizeof(dev.name) - 1);
871 fw3_ipt_rule_in_out(r, (out) ? NULL : &dev, (out) ? &dev : NULL);
876 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
878 char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
879 uint8_t *addr = mac->mac.ether_addr_octet;
884 sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
885 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
887 fw3_ipt_rule_addarg(r, false, "-m", "mac");
888 fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", buf);
892 fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
894 char buf[sizeof("255/255\0")];
900 if (r->h->family == FW3_FAMILY_V6)
902 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
903 sprintf(buf, "%u", icmp->type6);
905 sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
907 fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
912 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
913 sprintf(buf, "%u", icmp->type);
915 sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
917 fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
922 fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
924 char buf[sizeof("-4294967296/second\0")];
926 if (!limit || limit->rate <= 0)
929 fw3_ipt_rule_addarg(r, false, "-m", "limit");
931 sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
932 fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
934 if (limit->burst > 0)
936 sprintf(buf, "%u", limit->burst);
937 fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
942 fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_setmatch *match)
944 char buf[sizeof("dst,dst,dst\0")];
948 struct fw3_ipset *set;
949 struct fw3_ipset_datatype *type;
951 if (!match || !match->set || !match->ptr)
955 list_for_each_entry(type, &set->datatypes, list)
963 p += sprintf(p, "%s", match->dir[i] ? match->dir[i] : type->dir);
967 fw3_ipt_rule_addarg(r, false, "-m", "set");
969 fw3_ipt_rule_addarg(r, match->invert, "--match-set",
970 set->external ? set->external : set->name);
972 fw3_ipt_rule_addarg(r, false, buf, NULL);
976 fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
979 struct tm empty = { 0 };
981 char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
984 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
985 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
987 if (!d1 && !d2 && !time->timestart && !time->timestop &&
988 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
993 fw3_ipt_rule_addarg(r, false, "-m", "time");
996 fw3_ipt_rule_addarg(r, false, "--utc", NULL);
1000 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
1001 fw3_ipt_rule_addarg(r, false, "--datestart", buf);
1006 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
1007 fw3_ipt_rule_addarg(r, false, "--datestop", buf);
1010 if (time->timestart)
1012 sprintf(buf, "%02d:%02d:%02d",
1013 time->timestart / 3600,
1014 time->timestart % 3600 / 60,
1015 time->timestart % 60);
1017 fw3_ipt_rule_addarg(r, false, "--timestart", buf);
1022 sprintf(buf, "%02d:%02d:%02d",
1023 time->timestop / 3600,
1024 time->timestop % 3600 / 60,
1025 time->timestop % 60);
1027 fw3_ipt_rule_addarg(r, false, "--timestop", buf);
1030 if (time->monthdays & 0xFFFFFFFE)
1032 for (i = 1, p = buf; i < 32; i++)
1034 if (fw3_hasbit(time->monthdays, i))
1039 p += sprintf(p, "%u", i);
1043 fw3_ipt_rule_addarg(r, fw3_hasbit(time->monthdays, 0), "--monthdays", buf);
1046 if (time->weekdays & 0xFE)
1048 for (i = 1, p = buf; i < 8; i++)
1050 if (fw3_hasbit(time->weekdays, i))
1055 p += sprintf(p, "%u", i);
1059 fw3_ipt_rule_addarg(r, fw3_hasbit(time->weekdays, 0), "--weekdays", buf);
1064 fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
1066 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1068 if (!mark || !mark->set)
1071 if (mark->mask < 0xFFFFFFFF)
1072 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
1074 sprintf(buf, "0x%x", mark->mark);
1076 fw3_ipt_rule_addarg(r, false, "-m", "mark");
1077 fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
1081 fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
1090 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1093 fw3_ipt_rule_addarg(r, false, "-m", "comment");
1094 fw3_ipt_rule_addarg(r, false, "--comment", buf);
1098 fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
1102 if (!extra || !*extra)
1105 s = fw3_strdup(extra);
1107 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
1109 tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
1115 r->argv[r->argc++] = fw3_strdup(p);
1121 #ifndef DISABLE_IPV6
1123 rule_print6(struct ip6t_entry *e)
1125 char buf1[INET6_ADDRSTRLEN], buf2[INET6_ADDRSTRLEN];
1128 if (e->ipv6.flags & IP6T_F_PROTO)
1130 if (e->ipv6.invflags & XT_INV_PROTO)
1133 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
1136 printf(" -p %s", pname);
1138 printf(" -p %u", e->ipv6.proto);
1141 if (e->ipv6.iniface[0])
1143 if (e->ipv6.invflags & IP6T_INV_VIA_IN)
1146 printf(" -i %s", e->ipv6.iniface);
1149 if (e->ipv6.outiface[0])
1151 if (e->ipv6.invflags & IP6T_INV_VIA_OUT)
1154 printf(" -o %s", e->ipv6.outiface);
1157 if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
1159 if (e->ipv6.invflags & IP6T_INV_SRCIP)
1163 inet_ntop(AF_INET6, &e->ipv6.src, buf1, sizeof(buf1)),
1164 inet_ntop(AF_INET6, &e->ipv6.smsk, buf2, sizeof(buf2)));
1167 if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
1169 if (e->ipv6.invflags & IP6T_INV_DSTIP)
1173 inet_ntop(AF_INET6, &e->ipv6.dst, buf1, sizeof(buf1)),
1174 inet_ntop(AF_INET6, &e->ipv6.dmsk, buf2, sizeof(buf2)));
1180 rule_print4(struct ipt_entry *e)
1182 struct in_addr in_zero = { 0 };
1183 char buf1[sizeof("255.255.255.255\0")], buf2[sizeof("255.255.255.255\0")];
1188 if (e->ip.invflags & XT_INV_PROTO)
1191 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
1194 printf(" -p %s", pname);
1196 printf(" -p %u", e->ip.proto);
1199 if (e->ip.iniface[0])
1201 if (e->ip.invflags & IPT_INV_VIA_IN)
1204 printf(" -i %s", e->ip.iniface);
1207 if (e->ip.outiface[0])
1209 if (e->ip.invflags & IPT_INV_VIA_OUT)
1212 printf(" -o %s", e->ip.outiface);
1215 if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
1217 if (e->ip.invflags & IPT_INV_SRCIP)
1221 inet_ntop(AF_INET, &e->ip.src, buf1, sizeof(buf1)),
1222 inet_ntop(AF_INET, &e->ip.smsk, buf2, sizeof(buf2)));
1225 if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
1227 if (e->ip.invflags & IPT_INV_DSTIP)
1231 inet_ntop(AF_INET, &e->ip.dst, buf1, sizeof(buf1)),
1232 inet_ntop(AF_INET, &e->ip.dmsk, buf2, sizeof(buf2)));
1237 rule_print(struct fw3_ipt_rule *r, const char *prefix, const char *chain)
1239 debug(r->h, "%s %s", prefix, chain);
1241 #ifndef DISABLE_IPV6
1242 if (r->h->family == FW3_FAMILY_V6)
1243 rule_print6(&r->e6);
1248 fw3_xt_print_matches(&r->e.ip, r->matches);
1249 fw3_xt_print_target(&r->e.ip, r->target);
1255 parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
1257 struct xtables_rule_match *m;
1258 struct xtables_match *em;
1260 /* is a target option */
1261 if (r->target && fw3_xt_has_target_parse(r->target) &&
1262 optc >= r->target->option_offset &&
1263 optc < (r->target->option_offset + 256))
1265 xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
1269 /* try to dispatch argument to one of the match parsers */
1270 for (m = r->matches; m; m = m->next)
1274 if (m->completed || !fw3_xt_has_match_parse(em))
1277 if (optc < em->option_offset ||
1278 optc >= (em->option_offset + 256))
1281 xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
1285 /* unhandled option, might belong to a protocol match */
1286 if ((em = load_protomatch(r)) != NULL)
1288 init_match(r, em, false);
1290 r->protocol_loaded = true;
1297 warn("parse_option(): option '%s' needs argument", r->argv[optind-1]);
1300 warn("parse_option(): unknown option '%s'", r->argv[optind-1]);
1306 fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
1307 const char *k, const char *v)
1315 n = inv + !!k + !!v;
1316 tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
1324 r->argv[r->argc++] = fw3_strdup("!");
1326 r->argv[r->argc++] = fw3_strdup(k);
1329 r->argv[r->argc++] = fw3_strdup(v);
1332 static unsigned char *
1333 rule_mask(struct fw3_ipt_rule *r)
1336 unsigned char *p, *mask = NULL;
1337 struct xtables_rule_match *m;
1339 #define SZ(x) XT_ALIGN(sizeof(struct x))
1341 #ifndef DISABLE_IPV6
1342 if (r->h->family == FW3_FAMILY_V6)
1346 for (m = r->matches; m; m = m->next)
1347 s += SZ(ip6t_entry_match) + m->match->size;
1349 s += SZ(ip6t_entry_target);
1351 s += r->target->size;
1353 mask = fw3_alloc(s);
1354 memset(mask, 0xFF, SZ(ip6t_entry));
1355 p = mask + SZ(ip6t_entry);
1357 for (m = r->matches; m; m = m->next)
1359 memset(p, 0xFF, SZ(ip6t_entry_match) + m->match->userspacesize);
1360 p += SZ(ip6t_entry_match) + m->match->size;
1363 memset(p, 0xFF, SZ(ip6t_entry_target) + (r->target) ? r->target->userspacesize : 0);
1370 for (m = r->matches; m; m = m->next)
1371 s += SZ(ipt_entry_match) + m->match->size;
1373 s += SZ(ipt_entry_target);
1375 s += r->target->size;
1377 mask = fw3_alloc(s);
1378 memset(mask, 0xFF, SZ(ipt_entry));
1379 p = mask + SZ(ipt_entry);
1381 for (m = r->matches; m; m = m->next)
1383 memset(p, 0xFF, SZ(ipt_entry_match) + m->match->userspacesize);
1384 p += SZ(ipt_entry_match) + m->match->size;
1387 memset(p, 0xFF, SZ(ipt_entry_target) + (r->target) ? r->target->userspacesize : 0);
1394 rule_build(struct fw3_ipt_rule *r)
1396 size_t s, target_size = (r->target) ? r->target->t->u.target_size : 0;
1397 struct xtables_rule_match *m;
1399 #ifndef DISABLE_IPV6
1400 if (r->h->family == FW3_FAMILY_V6)
1402 struct ip6t_entry *e6;
1404 s = XT_ALIGN(sizeof(struct ip6t_entry));
1406 for (m = r->matches; m; m = m->next)
1407 s += m->match->m->u.match_size;
1409 e6 = fw3_alloc(s + target_size);
1411 memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
1413 e6->target_offset = s;
1414 e6->next_offset = s + target_size;
1418 for (m = r->matches; m; m = m->next)
1420 memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
1421 s += m->match->m->u.match_size;
1425 memcpy(e6->elems + s, r->target->t, target_size);
1432 struct ipt_entry *e;
1434 s = XT_ALIGN(sizeof(struct ipt_entry));
1436 for (m = r->matches; m; m = m->next)
1437 s += m->match->m->u.match_size;
1439 e = fw3_alloc(s + target_size);
1441 memcpy(e, &r->e, sizeof(struct ipt_entry));
1443 e->target_offset = s;
1444 e->next_offset = s + target_size;
1448 for (m = r->matches; m; m = m->next)
1450 memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
1451 s += m->match->m->u.match_size;
1455 memcpy(e->elems + s, r->target->t, target_size);
1462 __fw3_ipt_rule_append(struct fw3_ipt_rule *r, bool repl, const char *fmt, ...)
1465 unsigned char *mask;
1467 struct xtables_rule_match *m;
1468 struct xtables_match *em;
1469 struct xtables_target *et;
1470 struct xtables_globals *g;
1479 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1482 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
1483 g->opts = g->orig_opts;
1490 em = find_match(r, "id");
1494 warn("fw3_ipt_rule_append(): Can't find match '%s'", "id");
1498 init_match(r, em, true);
1500 id = FW3_ID_MAGIC | (r->id & ~FW3_ID_MASK);
1501 memcpy(em->m->data, &id, sizeof(id));
1506 while ((optc = getopt_long(r->argc, r->argv, "-:m:j:", g->opts,
1512 em = find_match(r, optarg);
1516 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg);
1520 init_match(r, em, true);
1524 et = get_target(r, optarg);
1528 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg);
1535 if ((optarg[0] == '!') && (optarg[1] == '\0'))
1542 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg);
1546 if (parse_option(r, optc, inv))
1554 for (m = r->matches; m; m = m->next)
1555 xtables_option_mfcall(m->match);
1558 xtables_option_tfcall(r->target);
1560 rule = rule_build(r);
1562 #ifndef DISABLE_IPV6
1563 if (r->h->family == FW3_FAMILY_V6)
1567 mask = rule_mask(r);
1569 while (ip6tc_delete_entry(buf, rule, mask, r->h->handle))
1571 rule_print(r, "-D", buf);
1577 rule_print(r, "-A", buf);
1579 if (!ip6tc_append_entry(buf, rule, r->h->handle))
1580 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno));
1587 mask = rule_mask(r);
1589 while (iptc_delete_entry(buf, rule, mask, r->h->handle))
1591 rule_print(r, "-D", buf);
1597 rule_print(r, "-A", buf);
1599 if (!iptc_append_entry(buf, rule, r->h->handle))
1600 warn("iptc_append_entry(): %s\n", iptc_strerror(errno));
1606 for (i = 1; i < r->argc; i++)
1611 xtables_rule_matches_free(&r->matches);
1618 /* reset all targets and matches */
1619 for (em = xtables_matches; em; em = em->next)
1622 for (et = xtables_targets; et; et = et->next)
1628 xtables_free_opts(1);
1631 struct fw3_ipt_rule *
1632 fw3_ipt_rule_create(struct fw3_ipt_handle *handle, struct fw3_protocol *proto,
1633 struct fw3_device *in, struct fw3_device *out,
1634 struct fw3_address *src, struct fw3_address *dest)
1636 struct fw3_ipt_rule *r;
1638 r = fw3_ipt_rule_new(handle);
1640 fw3_ipt_rule_proto(r, proto);
1641 fw3_ipt_rule_in_out(r, in, out);
1642 fw3_ipt_rule_src_dest(r, src, dest);
1648 xtables_register_match(struct xtables_match *me)
1651 static struct xtables_match **tmp;
1653 if (!xext.register_match)
1654 xext.register_match = dlsym(RTLD_NEXT, "xtables_register_match");
1656 if (!xext.register_match)
1659 xext.register_match(me);
1663 for (i = 0; i < xext.mcount; i++)
1664 if (xext.matches[i] == me)
1667 tmp = realloc(xext.matches, sizeof(me) * (xext.mcount + 1));
1673 xext.matches[xext.mcount++] = me;
1678 xtables_register_target(struct xtables_target *me)
1681 static struct xtables_target **tmp;
1683 if (!xext.register_target)
1684 xext.register_target = dlsym(RTLD_NEXT, "xtables_register_target");
1686 if (!xext.register_target)
1689 xext.register_target(me);
1693 for (i = 0; i < xext.tcount; i++)
1694 if (xext.targets[i] == me)
1697 tmp = realloc(xext.targets, sizeof(me) * (xext.tcount + 1));
1703 xext.targets[xext.tcount++] = me;