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,
32 #if XTABLES_VERSION_CODE > 10
33 .compat_rev = xtables_compatible_revision,
37 static struct xtables_globals xtg6 = {
39 .program_version = "6",
40 .orig_opts = base_opts,
41 #if XTABLES_VERSION_CODE > 10
42 .compat_rev = xtables_compatible_revision,
49 struct xtables_match **matches;
50 struct xtables_target **targets;
51 void (*register_match)(struct xtables_match *);
52 void (*register_target)(struct xtables_target *);
56 /* Required by certain extensions like SNAT and DNAT */
57 int kernel_version = 0;
60 get_kernel_version(void)
62 static struct utsname uts;
63 int x = 0, y = 0, z = 0;
65 if (uname(&uts) == -1)
66 sprintf(uts.release, "3.0.0");
68 sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
69 kernel_version = 0x10000 * x + 0x100 * y + z;
72 static void fw3_init_extensions(void)
82 struct fw3_ipt_handle *
83 fw3_ipt_open(enum fw3_family family, enum fw3_table table)
86 struct fw3_ipt_handle *h;
88 h = fw3_alloc(sizeof(*h));
92 if (family == FW3_FAMILY_V6)
95 h->family = FW3_FAMILY_V6;
97 h->handle = ip6tc_init(fw3_flag_names[table]);
99 xtables_set_params(&xtg6);
100 xtables_set_nfproto(NFPROTO_IPV6);
105 h->family = FW3_FAMILY_V4;
107 h->handle = iptc_init(fw3_flag_names[table]);
109 xtables_set_params(&xtg);
110 xtables_set_nfproto(NFPROTO_IPV4);
120 fw3_init_extensions();
122 if (xext.register_match)
123 for (i = 0; i < xext.mcount; i++)
124 xext.register_match(xext.matches[i]);
126 if (xext.register_target)
127 for (i = 0; i < xext.tcount; i++)
128 xext.register_target(xext.targets[i]);
134 debug(struct fw3_ipt_handle *h, const char *fmt, ...)
138 printf("%s -t %s ", (h->family == FW3_FAMILY_V6) ? "ip6tables" : "iptables",
139 fw3_flag_names[h->table]);
147 fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
148 enum fw3_flag policy)
151 debug(h, "-P %s %s\n", chain, fw3_flag_names[policy]);
154 if (h->family == FW3_FAMILY_V6)
155 ip6tc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
158 iptc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
162 fw3_ipt_flush_chain(struct fw3_ipt_handle *h, const char *chain)
165 debug(h, "-F %s\n", chain);
168 if (h->family == FW3_FAMILY_V6)
169 ip6tc_flush_entries(chain, h->handle);
172 iptc_flush_entries(chain, h->handle);
176 delete_rules(struct fw3_ipt_handle *h, const char *target)
179 const struct ipt_entry *e;
185 if (h->family == FW3_FAMILY_V6)
187 for (chain = ip6tc_first_chain(h->handle);
189 chain = ip6tc_next_chain(h->handle))
194 const struct ip6t_entry *e6;
195 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
197 num++, e6 = ip6tc_next_rule(e6, h->handle))
199 t = ip6tc_get_target(e6, h->handle);
201 if (*t && !strcmp(t, target))
204 debug(h, "-D %s %u\n", chain, num + 1);
206 ip6tc_delete_num_entry(chain, num, h->handle);
217 for (chain = iptc_first_chain(h->handle);
219 chain = iptc_next_chain(h->handle))
224 for (num = 0, e = iptc_first_rule(chain, h->handle);
226 num++, e = iptc_next_rule(e, h->handle))
228 t = iptc_get_target(e, h->handle);
230 if (*t && !strcmp(t, target))
233 debug(h, "-D %s %u\n", chain, num + 1);
235 iptc_delete_num_entry(chain, num, h->handle);
246 fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain)
248 delete_rules(h, chain);
251 debug(h, "-X %s\n", chain);
254 if (h->family == FW3_FAMILY_V6)
255 ip6tc_delete_chain(chain, h->handle);
258 iptc_delete_chain(chain, h->handle);
262 get_rule_id(const void *base, unsigned int start, unsigned int end)
266 const struct xt_entry_match *em;
268 for (i = start; i < end; i += em->u.match_size)
272 if (strcmp(em->u.user.name, "id"))
275 memcpy(&id, em->data, sizeof(id));
277 if ((id & FW3_ID_MASK) != FW3_ID_MAGIC)
280 return (id & ~FW3_ID_MASK);
287 fw3_ipt_delete_id_rules(struct fw3_ipt_handle *h, const char *chain)
290 const struct ipt_entry *e;
295 if (h->family == FW3_FAMILY_V6)
297 if (!ip6tc_is_chain(chain, h->handle))
303 const struct ip6t_entry *e6;
304 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
306 num++, e6 = ip6tc_next_rule(e6, h->handle))
308 id = get_rule_id(e6, sizeof(*e6), e6->target_offset);
313 debug(h, "-D %s %u\n", chain, num + 1);
315 ip6tc_delete_num_entry(chain, num, h->handle);
325 if (!iptc_is_chain(chain, h->handle))
331 for (num = 0, e = iptc_first_rule(chain, h->handle);
333 num++, e = iptc_next_rule(e, h->handle))
335 id = get_rule_id(e, sizeof(*e), e->target_offset);
340 debug(h, "-D %s %u\n", chain, num + 1);
342 iptc_delete_num_entry(chain, num, h->handle);
352 fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...)
358 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
362 debug(h, "-N %s\n", buf);
364 iptc_create_chain(buf, h->handle);
368 fw3_ipt_flush(struct fw3_ipt_handle *h)
373 if (h->family == FW3_FAMILY_V6)
375 for (chain = ip6tc_first_chain(h->handle);
377 chain = ip6tc_next_chain(h->handle))
379 ip6tc_flush_entries(chain, h->handle);
382 for (chain = ip6tc_first_chain(h->handle);
384 chain = ip6tc_next_chain(h->handle))
386 ip6tc_delete_chain(chain, h->handle);
392 for (chain = iptc_first_chain(h->handle);
394 chain = iptc_next_chain(h->handle))
396 iptc_flush_entries(chain, h->handle);
399 for (chain = iptc_first_chain(h->handle);
401 chain = iptc_next_chain(h->handle))
403 iptc_delete_chain(chain, h->handle);
409 chain_is_empty(struct fw3_ipt_handle *h, const char *chain)
412 if (h->family == FW3_FAMILY_V6)
413 return (!ip6tc_builtin(chain, h->handle) &&
414 !ip6tc_first_rule(chain, h->handle));
417 return (!iptc_builtin(chain, h->handle) &&
418 !iptc_first_rule(chain, h->handle));
422 fw3_ipt_gc(struct fw3_ipt_handle *h)
428 if (h->family == FW3_FAMILY_V6)
433 for (chain = ip6tc_first_chain(h->handle);
435 chain = ip6tc_next_chain(h->handle))
437 if (!chain_is_empty(h, chain))
440 fw3_ipt_delete_chain(h, chain);
452 for (chain = iptc_first_chain(h->handle);
454 chain = iptc_next_chain(h->handle))
456 warn("C=%s\n", chain);
458 if (!chain_is_empty(h, chain))
461 warn("D=%s\n", chain);
463 fw3_ipt_delete_chain(h, chain);
472 fw3_ipt_commit(struct fw3_ipt_handle *h)
477 if (h->family == FW3_FAMILY_V6)
479 rv = ip6tc_commit(h->handle);
481 warn("ip6tc_commit(): %s", ip6tc_strerror(errno));
486 rv = iptc_commit(h->handle);
488 warn("iptc_commit(): %s", iptc_strerror(errno));
493 fw3_ipt_close(struct fw3_ipt_handle *h)
498 struct fw3_ipt_rule *
499 fw3_ipt_rule_new(struct fw3_ipt_handle *h)
501 struct fw3_ipt_rule *r;
503 r = fw3_alloc(sizeof(*r));
507 r->argv = fw3_alloc(sizeof(char *));
508 r->argv[r->argc++] = "fw3";
515 is_chain(struct fw3_ipt_handle *h, const char *name)
518 if (h->family == FW3_FAMILY_V6)
519 return ip6tc_is_chain(name, h->handle);
522 return iptc_is_chain(name, h->handle);
526 get_protoname(struct fw3_ipt_rule *r)
528 const struct xtables_pprot *pp;
531 for (pp = xtables_chain_protos; pp->name; pp++)
532 if (pp->num == r->protocol)
533 return (char *)pp->name;
538 static struct xtables_match *
539 find_match(struct fw3_ipt_rule *r, const char *name)
541 struct xtables_match *m;
544 m = xtables_find_match(name, XTF_TRY_LOAD, &r->matches);
551 init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
554 struct xtables_globals *g;
559 s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
563 fw3_xt_set_match_name(m);
565 m->m->u.user.revision = m->revision;
566 m->m->u.match_size = s;
568 /* free previous userspace data */
569 fw3_xt_free_match_udata(m);
574 /* don't merge options if no_clone is set and this match is a clone */
575 if (no_clone && (m == m->next))
578 /* merge option table */
579 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
580 fw3_xt_merge_match_options(g, m);
584 need_protomatch(struct fw3_ipt_rule *r, const char *pname)
589 if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
592 return !r->protocol_loaded;
595 static struct xtables_match *
596 load_protomatch(struct fw3_ipt_rule *r)
598 const char *pname = get_protoname(r);
600 if (!need_protomatch(r, pname))
603 return find_match(r, pname);
606 static struct xtables_target *
607 find_target(struct fw3_ipt_rule *r, const char *name)
609 struct xtables_target *t;
613 if (is_chain(r->h, name))
614 t = xtables_find_target(XT_STANDARD_TARGET, XTF_TRY_LOAD);
616 t = xtables_find_target(name, XTF_TRY_LOAD);
623 static struct xtables_target *
624 get_target(struct fw3_ipt_rule *r, const char *name)
627 struct xtables_target *t;
628 struct xtables_globals *g;
630 t = find_target(r, name);
635 s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
638 fw3_xt_set_target_name(t, name);
640 t->t->u.user.revision = t->revision;
641 t->t->u.target_size = s;
643 /* free previous userspace data */
644 fw3_xt_free_target_udata(t);
649 /* merge option table */
650 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
651 fw3_xt_merge_target_options(g, t);
659 fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
663 if (!proto || proto->any)
666 pr = proto->protocol;
669 if (r->h->family == FW3_FAMILY_V6)
674 r->e6.ipv6.proto = pr;
675 r->e6.ipv6.flags |= IP6T_F_PROTO;
678 r->e6.ipv6.invflags |= XT_INV_PROTO;
686 r->e.ip.invflags |= XT_INV_PROTO;
693 fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
694 struct fw3_device *in, struct fw3_device *out)
697 if (r->h->family == FW3_FAMILY_V6)
701 xtables_parse_interface(in->name, r->e6.ipv6.iniface,
702 r->e6.ipv6.iniface_mask);
705 r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
708 if (out && !out->any)
710 xtables_parse_interface(out->name, r->e6.ipv6.outiface,
711 r->e6.ipv6.outiface_mask);
714 r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
722 xtables_parse_interface(in->name, r->e.ip.iniface,
723 r->e.ip.iniface_mask);
726 r->e.ip.invflags |= IPT_INV_VIA_IN;
729 if (out && !out->any)
731 xtables_parse_interface(out->name, r->e.ip.outiface,
732 r->e.ip.outiface_mask);
735 r->e.ip.invflags |= IPT_INV_VIA_OUT;
742 fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
743 struct fw3_address *src, struct fw3_address *dest)
745 if ((src && src->range) || (dest && dest->range))
747 fw3_ipt_rule_addarg(r, false, "-m", "iprange");
754 fw3_ipt_rule_addarg(r, src->invert, "--src-range",
755 fw3_address_to_string(src, false, false));
758 else if (r->h->family == FW3_FAMILY_V6)
760 r->e6.ipv6.src = src->address.v6;
761 r->e6.ipv6.smsk = src->mask.v6;
764 for (i = 0; i < 4; i++)
765 r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
768 r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
773 r->e.ip.src = src->address.v4;
774 r->e.ip.smsk = src->mask.v4;
776 r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
779 r->e.ip.invflags |= IPT_INV_SRCIP;
783 if (dest && dest->set)
787 fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
788 fw3_address_to_string(dest, false, false));
791 else if (r->h->family == FW3_FAMILY_V6)
793 r->e6.ipv6.dst = dest->address.v6;
794 r->e6.ipv6.dmsk = dest->mask.v6;
797 for (i = 0; i < 4; i++)
798 r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
801 r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
806 r->e.ip.dst = dest->address.v4;
807 r->e.ip.dmsk = dest->mask.v4;
809 r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
812 r->e.ip.invflags |= IPT_INV_DSTIP;
818 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
819 struct fw3_port *sp, struct fw3_port *dp)
821 char buf[sizeof("65535:65535\0")];
823 if ((!sp || !sp->set) && (!dp || !dp->set))
826 if (!get_protoname(r))
831 if (sp->port_min == sp->port_max)
832 sprintf(buf, "%u", sp->port_min);
834 sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
836 fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
841 if (dp->port_min == dp->port_max)
842 sprintf(buf, "%u", dp->port_min);
844 sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
846 fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
851 fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out)
854 struct fw3_device dev = { .any = false };
855 strncpy(dev.name, device, sizeof(dev.name) - 1);
856 fw3_ipt_rule_in_out(r, (out) ? NULL : &dev, (out) ? &dev : NULL);
861 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
863 char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
864 uint8_t *addr = mac->mac.ether_addr_octet;
869 sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
870 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
872 fw3_ipt_rule_addarg(r, false, "-m", "mac");
873 fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", buf);
877 fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
879 char buf[sizeof("255/255\0")];
885 if (r->h->family == FW3_FAMILY_V6)
887 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
888 sprintf(buf, "%u", icmp->type6);
890 sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
892 fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
897 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
898 sprintf(buf, "%u", icmp->type);
900 sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
902 fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
907 fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
909 char buf[sizeof("-4294967296/second\0")];
911 if (!limit || limit->rate <= 0)
914 fw3_ipt_rule_addarg(r, false, "-m", "limit");
916 sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
917 fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
919 if (limit->burst > 0)
921 sprintf(buf, "%u", limit->burst);
922 fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
927 fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_setmatch *match)
929 char buf[sizeof("dst,dst,dst\0")];
933 struct fw3_ipset *set;
934 struct fw3_ipset_datatype *type;
936 if (!match || !match->set || !match->ptr)
940 list_for_each_entry(type, &set->datatypes, list)
948 p += sprintf(p, "%s", match->dir[i] ? match->dir[i] : type->dir);
952 fw3_ipt_rule_addarg(r, false, "-m", "set");
954 fw3_ipt_rule_addarg(r, match->invert, "--match-set",
955 set->external ? set->external : set->name);
957 fw3_ipt_rule_addarg(r, false, buf, NULL);
961 fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
964 struct tm empty = { 0 };
966 char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
969 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
970 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
972 if (!d1 && !d2 && !time->timestart && !time->timestop &&
973 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
978 fw3_ipt_rule_addarg(r, false, "-m", "time");
981 fw3_ipt_rule_addarg(r, false, "--utc", NULL);
985 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
986 fw3_ipt_rule_addarg(r, false, "--datestart", buf);
991 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
992 fw3_ipt_rule_addarg(r, false, "--datestop", buf);
997 sprintf(buf, "%02d:%02d:%02d",
998 time->timestart / 3600,
999 time->timestart % 3600 / 60,
1000 time->timestart % 60);
1002 fw3_ipt_rule_addarg(r, false, "--timestart", buf);
1007 sprintf(buf, "%02d:%02d:%02d",
1008 time->timestop / 3600,
1009 time->timestop % 3600 / 60,
1010 time->timestop % 60);
1012 fw3_ipt_rule_addarg(r, false, "--timestop", buf);
1015 if (time->monthdays & 0xFFFFFFFE)
1017 for (i = 1, p = buf; i < 32; i++)
1019 if (fw3_hasbit(time->monthdays, i))
1024 p += sprintf(p, "%u", i);
1028 fw3_ipt_rule_addarg(r, fw3_hasbit(time->monthdays, 0), "--monthdays", buf);
1031 if (time->weekdays & 0xFE)
1033 for (i = 1, p = buf; i < 8; i++)
1035 if (fw3_hasbit(time->weekdays, i))
1040 p += sprintf(p, "%u", i);
1044 fw3_ipt_rule_addarg(r, fw3_hasbit(time->weekdays, 0), "--weekdays", buf);
1049 fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
1051 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1053 if (!mark || !mark->set)
1056 if (mark->mask < 0xFFFFFFFF)
1057 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
1059 sprintf(buf, "0x%x", mark->mark);
1061 fw3_ipt_rule_addarg(r, false, "-m", "mark");
1062 fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
1066 fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
1075 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1078 fw3_ipt_rule_addarg(r, false, "-m", "comment");
1079 fw3_ipt_rule_addarg(r, false, "--comment", buf);
1083 fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
1087 if (!extra || !*extra)
1090 s = fw3_strdup(extra);
1092 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
1094 tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
1100 r->argv[r->argc++] = fw3_strdup(p);
1106 #ifndef DISABLE_IPV6
1108 rule_print6(struct ip6t_entry *e)
1110 char buf1[INET6_ADDRSTRLEN], buf2[INET6_ADDRSTRLEN];
1113 if (e->ipv6.flags & IP6T_F_PROTO)
1115 if (e->ipv6.invflags & XT_INV_PROTO)
1118 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
1121 printf(" -p %s", pname);
1123 printf(" -p %u", e->ipv6.proto);
1126 if (e->ipv6.iniface[0])
1128 if (e->ipv6.invflags & IP6T_INV_VIA_IN)
1131 printf(" -i %s", e->ipv6.iniface);
1134 if (e->ipv6.outiface[0])
1136 if (e->ipv6.invflags & IP6T_INV_VIA_OUT)
1139 printf(" -o %s", e->ipv6.outiface);
1142 if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
1144 if (e->ipv6.invflags & IP6T_INV_SRCIP)
1148 inet_ntop(AF_INET6, &e->ipv6.src, buf1, sizeof(buf1)),
1149 inet_ntop(AF_INET6, &e->ipv6.smsk, buf2, sizeof(buf2)));
1152 if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
1154 if (e->ipv6.invflags & IP6T_INV_DSTIP)
1158 inet_ntop(AF_INET6, &e->ipv6.dst, buf1, sizeof(buf1)),
1159 inet_ntop(AF_INET6, &e->ipv6.dmsk, buf2, sizeof(buf2)));
1165 rule_print4(struct ipt_entry *e)
1167 struct in_addr in_zero = { 0 };
1168 char buf1[sizeof("255.255.255.255\0")], buf2[sizeof("255.255.255.255\0")];
1173 if (e->ip.invflags & XT_INV_PROTO)
1176 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
1179 printf(" -p %s", pname);
1181 printf(" -p %u", e->ip.proto);
1184 if (e->ip.iniface[0])
1186 if (e->ip.invflags & IPT_INV_VIA_IN)
1189 printf(" -i %s", e->ip.iniface);
1192 if (e->ip.outiface[0])
1194 if (e->ip.invflags & IPT_INV_VIA_OUT)
1197 printf(" -o %s", e->ip.outiface);
1200 if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
1202 if (e->ip.invflags & IPT_INV_SRCIP)
1206 inet_ntop(AF_INET, &e->ip.src, buf1, sizeof(buf1)),
1207 inet_ntop(AF_INET, &e->ip.smsk, buf2, sizeof(buf2)));
1210 if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
1212 if (e->ip.invflags & IPT_INV_DSTIP)
1216 inet_ntop(AF_INET, &e->ip.dst, buf1, sizeof(buf1)),
1217 inet_ntop(AF_INET, &e->ip.dmsk, buf2, sizeof(buf2)));
1222 rule_print(struct fw3_ipt_rule *r, const char *prefix, const char *chain)
1224 debug(r->h, "%s %s", prefix, chain);
1226 #ifndef DISABLE_IPV6
1227 if (r->h->family == FW3_FAMILY_V6)
1228 rule_print6(&r->e6);
1233 fw3_xt_print_matches(&r->e.ip, r->matches);
1234 fw3_xt_print_target(&r->e.ip, r->target);
1240 parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
1242 struct xtables_rule_match *m;
1243 struct xtables_match *em;
1245 /* is a target option */
1246 if (r->target && fw3_xt_has_target_parse(r->target) &&
1247 optc >= r->target->option_offset &&
1248 optc < (r->target->option_offset + 256))
1250 xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
1254 /* try to dispatch argument to one of the match parsers */
1255 for (m = r->matches; m; m = m->next)
1259 if (m->completed || !fw3_xt_has_match_parse(em))
1262 if (optc < em->option_offset ||
1263 optc >= (em->option_offset + 256))
1266 xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
1270 /* unhandled option, might belong to a protocol match */
1271 if ((em = load_protomatch(r)) != NULL)
1273 init_match(r, em, false);
1275 r->protocol_loaded = true;
1282 warn("parse_option(): option '%s' needs argument", r->argv[optind-1]);
1285 warn("parse_option(): unknown option '%s'", r->argv[optind-1]);
1291 fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
1292 const char *k, const char *v)
1300 n = inv + !!k + !!v;
1301 tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
1309 r->argv[r->argc++] = fw3_strdup("!");
1311 r->argv[r->argc++] = fw3_strdup(k);
1314 r->argv[r->argc++] = fw3_strdup(v);
1317 static unsigned char *
1318 rule_mask(struct fw3_ipt_rule *r)
1321 unsigned char *p, *mask = NULL;
1322 struct xtables_rule_match *m;
1324 #define SZ(x) XT_ALIGN(sizeof(struct x))
1326 #ifndef DISABLE_IPV6
1327 if (r->h->family == FW3_FAMILY_V6)
1331 for (m = r->matches; m; m = m->next)
1332 s += SZ(ip6t_entry_match) + m->match->size;
1334 s += SZ(ip6t_entry_target);
1336 s += r->target->size;
1338 mask = fw3_alloc(s);
1339 memset(mask, 0xFF, SZ(ip6t_entry));
1340 p = mask + SZ(ip6t_entry);
1342 for (m = r->matches; m; m = m->next)
1344 memset(p, 0xFF, SZ(ip6t_entry_match) + m->match->userspacesize);
1345 p += SZ(ip6t_entry_match) + m->match->size;
1348 memset(p, 0xFF, SZ(ip6t_entry_target) + (r->target) ? r->target->userspacesize : 0);
1355 for (m = r->matches; m; m = m->next)
1356 s += SZ(ipt_entry_match) + m->match->size;
1358 s += SZ(ipt_entry_target);
1360 s += r->target->size;
1362 mask = fw3_alloc(s);
1363 memset(mask, 0xFF, SZ(ipt_entry));
1364 p = mask + SZ(ipt_entry);
1366 for (m = r->matches; m; m = m->next)
1368 memset(p, 0xFF, SZ(ipt_entry_match) + m->match->userspacesize);
1369 p += SZ(ipt_entry_match) + m->match->size;
1372 memset(p, 0xFF, SZ(ipt_entry_target) + (r->target) ? r->target->userspacesize : 0);
1379 rule_build(struct fw3_ipt_rule *r)
1381 size_t s, target_size = (r->target) ? r->target->t->u.target_size : 0;
1382 struct xtables_rule_match *m;
1384 #ifndef DISABLE_IPV6
1385 if (r->h->family == FW3_FAMILY_V6)
1387 struct ip6t_entry *e6;
1389 s = XT_ALIGN(sizeof(struct ip6t_entry));
1391 for (m = r->matches; m; m = m->next)
1392 s += m->match->m->u.match_size;
1394 e6 = fw3_alloc(s + target_size);
1396 memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
1398 e6->target_offset = s;
1399 e6->next_offset = s + target_size;
1403 for (m = r->matches; m; m = m->next)
1405 memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
1406 s += m->match->m->u.match_size;
1410 memcpy(e6->elems + s, r->target->t, target_size);
1417 struct ipt_entry *e;
1419 s = XT_ALIGN(sizeof(struct ipt_entry));
1421 for (m = r->matches; m; m = m->next)
1422 s += m->match->m->u.match_size;
1424 e = fw3_alloc(s + target_size);
1426 memcpy(e, &r->e, sizeof(struct ipt_entry));
1428 e->target_offset = s;
1429 e->next_offset = s + target_size;
1433 for (m = r->matches; m; m = m->next)
1435 memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
1436 s += m->match->m->u.match_size;
1440 memcpy(e->elems + s, r->target->t, target_size);
1447 __fw3_ipt_rule_append(struct fw3_ipt_rule *r, bool repl, const char *fmt, ...)
1450 unsigned char *mask;
1452 struct xtables_rule_match *m;
1453 struct xtables_match *em;
1454 struct xtables_target *et;
1455 struct xtables_globals *g;
1464 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1467 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
1468 g->opts = g->orig_opts;
1475 em = find_match(r, "id");
1479 warn("fw3_ipt_rule_append(): Can't find match '%s'", "id");
1483 init_match(r, em, true);
1485 id = FW3_ID_MAGIC | (r->id & ~FW3_ID_MASK);
1486 memcpy(em->m->data, &id, sizeof(id));
1491 while ((optc = getopt_long(r->argc, r->argv, "-:m:j:", g->opts,
1497 em = find_match(r, optarg);
1501 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg);
1505 init_match(r, em, true);
1509 et = get_target(r, optarg);
1513 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg);
1520 if ((optarg[0] == '!') && (optarg[1] == '\0'))
1527 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg);
1531 if (parse_option(r, optc, inv))
1539 for (m = r->matches; m; m = m->next)
1540 xtables_option_mfcall(m->match);
1543 xtables_option_tfcall(r->target);
1545 rule = rule_build(r);
1547 #ifndef DISABLE_IPV6
1548 if (r->h->family == FW3_FAMILY_V6)
1552 mask = rule_mask(r);
1554 while (ip6tc_delete_entry(buf, rule, mask, r->h->handle))
1556 rule_print(r, "-D", buf);
1562 rule_print(r, "-A", buf);
1564 if (!ip6tc_append_entry(buf, rule, r->h->handle))
1565 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno));
1572 mask = rule_mask(r);
1574 while (iptc_delete_entry(buf, rule, mask, r->h->handle))
1576 rule_print(r, "-D", buf);
1582 rule_print(r, "-A", buf);
1584 if (!iptc_append_entry(buf, rule, r->h->handle))
1585 warn("iptc_append_entry(): %s\n", iptc_strerror(errno));
1591 for (i = 1; i < r->argc; i++)
1596 xtables_rule_matches_free(&r->matches);
1603 /* reset all targets and matches */
1604 for (em = xtables_matches; em; em = em->next)
1607 for (et = xtables_targets; et; et = et->next)
1613 xtables_free_opts(1);
1616 struct fw3_ipt_rule *
1617 fw3_ipt_rule_create(struct fw3_ipt_handle *handle, struct fw3_protocol *proto,
1618 struct fw3_device *in, struct fw3_device *out,
1619 struct fw3_address *src, struct fw3_address *dest)
1621 struct fw3_ipt_rule *r;
1623 r = fw3_ipt_rule_new(handle);
1625 fw3_ipt_rule_proto(r, proto);
1626 fw3_ipt_rule_in_out(r, in, out);
1627 fw3_ipt_rule_src_dest(r, src, dest);
1633 xtables_register_match(struct xtables_match *me)
1636 static struct xtables_match **tmp;
1638 if (!xext.register_match)
1639 xext.register_match = dlsym(RTLD_NEXT, "xtables_register_match");
1641 if (!xext.register_match)
1644 xext.register_match(me);
1648 for (i = 0; i < xext.mcount; i++)
1649 if (xext.matches[i] == me)
1652 tmp = realloc(xext.matches, sizeof(me) * (xext.mcount + 1));
1658 xext.matches[xext.mcount++] = me;
1663 xtables_register_target(struct xtables_target *me)
1666 static struct xtables_target **tmp;
1668 if (!xext.register_target)
1669 xext.register_target = dlsym(RTLD_NEXT, "xtables_register_target");
1671 if (!xext.register_target)
1674 xext.register_target(me);
1678 for (i = 0; i < xext.tcount; i++)
1679 if (xext.targets[i] == me)
1682 tmp = realloc(xext.targets, sizeof(me) * (xext.tcount + 1));
1688 xext.targets[xext.tcount++] = me;