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 has_rule_tag(const void *base, unsigned int start, unsigned int end)
265 const struct xt_entry_match *em;
267 for (i = start; i < end; i += em->u.match_size)
271 if (strcmp(em->u.user.name, "comment"))
274 if (!memcmp(em->data, "!fw3", 4))
282 fw3_ipt_delete_id_rules(struct fw3_ipt_handle *h, const char *chain)
285 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 if (has_rule_tag(e6, sizeof(*e6), e6->target_offset))
305 debug(h, "-D %s %u\n", chain, num + 1);
307 ip6tc_delete_num_entry(chain, num, h->handle);
317 if (!iptc_is_chain(chain, h->handle))
323 for (num = 0, e = iptc_first_rule(chain, h->handle);
325 num++, e = iptc_next_rule(e, h->handle))
327 if (has_rule_tag(e, sizeof(*e), e->target_offset))
330 debug(h, "-D %s %u\n", chain, num + 1);
332 iptc_delete_num_entry(chain, num, h->handle);
342 fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...)
348 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
352 debug(h, "-N %s\n", buf);
354 iptc_create_chain(buf, h->handle);
358 fw3_ipt_flush(struct fw3_ipt_handle *h)
363 if (h->family == FW3_FAMILY_V6)
365 for (chain = ip6tc_first_chain(h->handle);
367 chain = ip6tc_next_chain(h->handle))
369 ip6tc_flush_entries(chain, h->handle);
372 for (chain = ip6tc_first_chain(h->handle);
374 chain = ip6tc_next_chain(h->handle))
376 ip6tc_delete_chain(chain, h->handle);
382 for (chain = iptc_first_chain(h->handle);
384 chain = iptc_next_chain(h->handle))
386 iptc_flush_entries(chain, h->handle);
389 for (chain = iptc_first_chain(h->handle);
391 chain = iptc_next_chain(h->handle))
393 iptc_delete_chain(chain, h->handle);
399 chain_is_empty(struct fw3_ipt_handle *h, const char *chain)
402 if (h->family == FW3_FAMILY_V6)
403 return (!ip6tc_builtin(chain, h->handle) &&
404 !ip6tc_first_rule(chain, h->handle));
407 return (!iptc_builtin(chain, h->handle) &&
408 !iptc_first_rule(chain, h->handle));
412 fw3_ipt_gc(struct fw3_ipt_handle *h)
418 if (h->family == FW3_FAMILY_V6)
423 for (chain = ip6tc_first_chain(h->handle);
425 chain = ip6tc_next_chain(h->handle))
427 if (!chain_is_empty(h, chain))
430 fw3_ipt_delete_chain(h, chain);
442 for (chain = iptc_first_chain(h->handle);
444 chain = iptc_next_chain(h->handle))
446 warn("C=%s\n", chain);
448 if (!chain_is_empty(h, chain))
451 warn("D=%s\n", chain);
453 fw3_ipt_delete_chain(h, chain);
462 fw3_ipt_commit(struct fw3_ipt_handle *h)
467 if (h->family == FW3_FAMILY_V6)
469 rv = ip6tc_commit(h->handle);
471 warn("ip6tc_commit(): %s", ip6tc_strerror(errno));
476 rv = iptc_commit(h->handle);
478 warn("iptc_commit(): %s", iptc_strerror(errno));
483 fw3_ipt_close(struct fw3_ipt_handle *h)
488 struct fw3_ipt_rule *
489 fw3_ipt_rule_new(struct fw3_ipt_handle *h)
491 struct fw3_ipt_rule *r;
493 r = fw3_alloc(sizeof(*r));
496 r->argv = fw3_alloc(sizeof(char *));
497 r->argv[r->argc++] = "fw3";
504 is_chain(struct fw3_ipt_handle *h, const char *name)
507 if (h->family == FW3_FAMILY_V6)
508 return ip6tc_is_chain(name, h->handle);
511 return iptc_is_chain(name, h->handle);
515 get_protoname(struct fw3_ipt_rule *r)
517 const struct xtables_pprot *pp;
520 for (pp = xtables_chain_protos; pp->name; pp++)
521 if (pp->num == r->protocol)
522 return (char *)pp->name;
527 static struct xtables_match *
528 find_match(struct fw3_ipt_rule *r, const char *name)
530 struct xtables_match *m;
533 m = xtables_find_match(name, XTF_TRY_LOAD, &r->matches);
540 init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
543 struct xtables_globals *g;
548 s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
552 fw3_xt_set_match_name(m);
554 m->m->u.user.revision = m->revision;
555 m->m->u.match_size = s;
557 /* free previous userspace data */
558 fw3_xt_free_match_udata(m);
563 /* don't merge options if no_clone is set and this match is a clone */
564 if (no_clone && (m == m->next))
567 /* merge option table */
568 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
569 fw3_xt_merge_match_options(g, m);
573 need_protomatch(struct fw3_ipt_rule *r, const char *pname)
578 if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
581 return !r->protocol_loaded;
584 static struct xtables_match *
585 load_protomatch(struct fw3_ipt_rule *r)
587 const char *pname = get_protoname(r);
589 if (!need_protomatch(r, pname))
592 return find_match(r, pname);
595 static struct xtables_target *
596 find_target(struct fw3_ipt_rule *r, const char *name)
598 struct xtables_target *t;
602 if (is_chain(r->h, name))
603 t = xtables_find_target(XT_STANDARD_TARGET, XTF_TRY_LOAD);
605 t = xtables_find_target(name, XTF_TRY_LOAD);
612 static struct xtables_target *
613 get_target(struct fw3_ipt_rule *r, const char *name)
616 struct xtables_target *t;
617 struct xtables_globals *g;
619 t = find_target(r, name);
624 s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
627 fw3_xt_set_target_name(t, name);
629 t->t->u.user.revision = t->revision;
630 t->t->u.target_size = s;
632 /* free previous userspace data */
633 fw3_xt_free_target_udata(t);
638 /* merge option table */
639 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
640 fw3_xt_merge_target_options(g, t);
648 fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
652 if (!proto || proto->any)
655 pr = proto->protocol;
658 if (r->h->family == FW3_FAMILY_V6)
663 r->e6.ipv6.proto = pr;
664 r->e6.ipv6.flags |= IP6T_F_PROTO;
667 r->e6.ipv6.invflags |= XT_INV_PROTO;
675 r->e.ip.invflags |= XT_INV_PROTO;
682 fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
683 struct fw3_device *in, struct fw3_device *out)
686 if (r->h->family == FW3_FAMILY_V6)
690 xtables_parse_interface(in->name, r->e6.ipv6.iniface,
691 r->e6.ipv6.iniface_mask);
694 r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
697 if (out && !out->any)
699 xtables_parse_interface(out->name, r->e6.ipv6.outiface,
700 r->e6.ipv6.outiface_mask);
703 r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
711 xtables_parse_interface(in->name, r->e.ip.iniface,
712 r->e.ip.iniface_mask);
715 r->e.ip.invflags |= IPT_INV_VIA_IN;
718 if (out && !out->any)
720 xtables_parse_interface(out->name, r->e.ip.outiface,
721 r->e.ip.outiface_mask);
724 r->e.ip.invflags |= IPT_INV_VIA_OUT;
731 fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
732 struct fw3_address *src, struct fw3_address *dest)
734 if ((src && src->range) || (dest && dest->range))
736 fw3_ipt_rule_addarg(r, false, "-m", "iprange");
743 fw3_ipt_rule_addarg(r, src->invert, "--src-range",
744 fw3_address_to_string(src, false, false));
747 else if (r->h->family == FW3_FAMILY_V6)
749 r->e6.ipv6.src = src->address.v6;
750 r->e6.ipv6.smsk = src->mask.v6;
753 for (i = 0; i < 4; i++)
754 r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
757 r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
762 r->e.ip.src = src->address.v4;
763 r->e.ip.smsk = src->mask.v4;
765 r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
768 r->e.ip.invflags |= IPT_INV_SRCIP;
772 if (dest && dest->set)
776 fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
777 fw3_address_to_string(dest, false, false));
780 else if (r->h->family == FW3_FAMILY_V6)
782 r->e6.ipv6.dst = dest->address.v6;
783 r->e6.ipv6.dmsk = dest->mask.v6;
786 for (i = 0; i < 4; i++)
787 r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
790 r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
795 r->e.ip.dst = dest->address.v4;
796 r->e.ip.dmsk = dest->mask.v4;
798 r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
801 r->e.ip.invflags |= IPT_INV_DSTIP;
807 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
808 struct fw3_port *sp, struct fw3_port *dp)
810 char buf[sizeof("65535:65535\0")];
812 if ((!sp || !sp->set) && (!dp || !dp->set))
815 if (!get_protoname(r))
820 if (sp->port_min == sp->port_max)
821 sprintf(buf, "%u", sp->port_min);
823 sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
825 fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
830 if (dp->port_min == dp->port_max)
831 sprintf(buf, "%u", dp->port_min);
833 sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
835 fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
840 fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out)
843 struct fw3_device dev = { .any = false };
844 strncpy(dev.name, device, sizeof(dev.name) - 1);
845 fw3_ipt_rule_in_out(r, (out) ? NULL : &dev, (out) ? &dev : NULL);
850 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
852 char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
853 uint8_t *addr = mac->mac.ether_addr_octet;
858 sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
859 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
861 fw3_ipt_rule_addarg(r, false, "-m", "mac");
862 fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", buf);
866 fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
868 char buf[sizeof("255/255\0")];
874 if (r->h->family == FW3_FAMILY_V6)
876 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
877 sprintf(buf, "%u", icmp->type6);
879 sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
881 fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
886 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
887 sprintf(buf, "%u", icmp->type);
889 sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
891 fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
896 fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
898 char buf[sizeof("-4294967296/second\0")];
900 if (!limit || limit->rate <= 0)
903 fw3_ipt_rule_addarg(r, false, "-m", "limit");
905 sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
906 fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
908 if (limit->burst > 0)
910 sprintf(buf, "%u", limit->burst);
911 fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
916 fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_setmatch *match)
918 char buf[sizeof("dst,dst,dst\0")];
922 struct fw3_ipset *set;
923 struct fw3_ipset_datatype *type;
925 if (!match || !match->set || !match->ptr)
929 list_for_each_entry(type, &set->datatypes, list)
937 p += sprintf(p, "%s", match->dir[i] ? match->dir[i] : type->dir);
941 fw3_ipt_rule_addarg(r, false, "-m", "set");
943 fw3_ipt_rule_addarg(r, match->invert, "--match-set",
944 set->external ? set->external : set->name);
946 fw3_ipt_rule_addarg(r, false, buf, NULL);
950 fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
953 struct tm empty = { 0 };
955 char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
958 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
959 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
961 if (!d1 && !d2 && !time->timestart && !time->timestop &&
962 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
967 fw3_ipt_rule_addarg(r, false, "-m", "time");
970 fw3_ipt_rule_addarg(r, false, "--utc", NULL);
974 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
975 fw3_ipt_rule_addarg(r, false, "--datestart", buf);
980 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
981 fw3_ipt_rule_addarg(r, false, "--datestop", buf);
986 sprintf(buf, "%02d:%02d:%02d",
987 time->timestart / 3600,
988 time->timestart % 3600 / 60,
989 time->timestart % 60);
991 fw3_ipt_rule_addarg(r, false, "--timestart", buf);
996 sprintf(buf, "%02d:%02d:%02d",
997 time->timestop / 3600,
998 time->timestop % 3600 / 60,
999 time->timestop % 60);
1001 fw3_ipt_rule_addarg(r, false, "--timestop", buf);
1004 if (time->monthdays & 0xFFFFFFFE)
1006 for (i = 1, p = buf; i < 32; i++)
1008 if (fw3_hasbit(time->monthdays, i))
1013 p += sprintf(p, "%u", i);
1017 fw3_ipt_rule_addarg(r, fw3_hasbit(time->monthdays, 0), "--monthdays", buf);
1020 if (time->weekdays & 0xFE)
1022 for (i = 1, p = buf; i < 8; i++)
1024 if (fw3_hasbit(time->weekdays, i))
1029 p += sprintf(p, "%u", i);
1033 fw3_ipt_rule_addarg(r, fw3_hasbit(time->weekdays, 0), "--weekdays", buf);
1038 fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
1040 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1042 if (!mark || !mark->set)
1045 if (mark->mask < 0xFFFFFFFF)
1046 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
1048 sprintf(buf, "0x%x", mark->mark);
1050 fw3_ipt_rule_addarg(r, false, "-m", "mark");
1051 fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
1055 fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
1064 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1067 fw3_ipt_rule_addarg(r, false, "-m", "comment");
1068 fw3_ipt_rule_addarg(r, false, "--comment", buf);
1072 fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
1076 if (!extra || !*extra)
1079 s = fw3_strdup(extra);
1081 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
1083 tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
1089 r->argv[r->argc++] = fw3_strdup(p);
1095 #ifndef DISABLE_IPV6
1097 rule_print6(struct ip6t_entry *e)
1099 char buf1[INET6_ADDRSTRLEN], buf2[INET6_ADDRSTRLEN];
1102 if (e->ipv6.flags & IP6T_F_PROTO)
1104 if (e->ipv6.invflags & XT_INV_PROTO)
1107 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
1110 printf(" -p %s", pname);
1112 printf(" -p %u", e->ipv6.proto);
1115 if (e->ipv6.iniface[0])
1117 if (e->ipv6.invflags & IP6T_INV_VIA_IN)
1120 printf(" -i %s", e->ipv6.iniface);
1123 if (e->ipv6.outiface[0])
1125 if (e->ipv6.invflags & IP6T_INV_VIA_OUT)
1128 printf(" -o %s", e->ipv6.outiface);
1131 if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
1133 if (e->ipv6.invflags & IP6T_INV_SRCIP)
1137 inet_ntop(AF_INET6, &e->ipv6.src, buf1, sizeof(buf1)),
1138 inet_ntop(AF_INET6, &e->ipv6.smsk, buf2, sizeof(buf2)));
1141 if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
1143 if (e->ipv6.invflags & IP6T_INV_DSTIP)
1147 inet_ntop(AF_INET6, &e->ipv6.dst, buf1, sizeof(buf1)),
1148 inet_ntop(AF_INET6, &e->ipv6.dmsk, buf2, sizeof(buf2)));
1154 rule_print4(struct ipt_entry *e)
1156 struct in_addr in_zero = { 0 };
1157 char buf1[sizeof("255.255.255.255\0")], buf2[sizeof("255.255.255.255\0")];
1162 if (e->ip.invflags & XT_INV_PROTO)
1165 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
1168 printf(" -p %s", pname);
1170 printf(" -p %u", e->ip.proto);
1173 if (e->ip.iniface[0])
1175 if (e->ip.invflags & IPT_INV_VIA_IN)
1178 printf(" -i %s", e->ip.iniface);
1181 if (e->ip.outiface[0])
1183 if (e->ip.invflags & IPT_INV_VIA_OUT)
1186 printf(" -o %s", e->ip.outiface);
1189 if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
1191 if (e->ip.invflags & IPT_INV_SRCIP)
1195 inet_ntop(AF_INET, &e->ip.src, buf1, sizeof(buf1)),
1196 inet_ntop(AF_INET, &e->ip.smsk, buf2, sizeof(buf2)));
1199 if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
1201 if (e->ip.invflags & IPT_INV_DSTIP)
1205 inet_ntop(AF_INET, &e->ip.dst, buf1, sizeof(buf1)),
1206 inet_ntop(AF_INET, &e->ip.dmsk, buf2, sizeof(buf2)));
1211 rule_print(struct fw3_ipt_rule *r, const char *prefix, const char *chain)
1213 debug(r->h, "%s %s", prefix, chain);
1215 #ifndef DISABLE_IPV6
1216 if (r->h->family == FW3_FAMILY_V6)
1217 rule_print6(&r->e6);
1222 fw3_xt_print_matches(&r->e.ip, r->matches);
1223 fw3_xt_print_target(&r->e.ip, r->target);
1229 parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
1231 struct xtables_rule_match *m;
1232 struct xtables_match *em;
1234 /* is a target option */
1235 if (r->target && fw3_xt_has_target_parse(r->target) &&
1236 optc >= r->target->option_offset &&
1237 optc < (r->target->option_offset + 256))
1239 xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
1243 /* try to dispatch argument to one of the match parsers */
1244 for (m = r->matches; m; m = m->next)
1248 if (m->completed || !fw3_xt_has_match_parse(em))
1251 if (optc < em->option_offset ||
1252 optc >= (em->option_offset + 256))
1255 xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
1259 /* unhandled option, might belong to a protocol match */
1260 if ((em = load_protomatch(r)) != NULL)
1262 init_match(r, em, false);
1264 r->protocol_loaded = true;
1271 warn("parse_option(): option '%s' needs argument", r->argv[optind-1]);
1274 warn("parse_option(): unknown option '%s'", r->argv[optind-1]);
1280 fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
1281 const char *k, const char *v)
1289 n = inv + !!k + !!v;
1290 tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
1298 r->argv[r->argc++] = fw3_strdup("!");
1300 r->argv[r->argc++] = fw3_strdup(k);
1303 r->argv[r->argc++] = fw3_strdup(v);
1306 static unsigned char *
1307 rule_mask(struct fw3_ipt_rule *r)
1310 unsigned char *p, *mask = NULL;
1311 struct xtables_rule_match *m;
1313 #define SZ(x) XT_ALIGN(sizeof(struct x))
1315 #ifndef DISABLE_IPV6
1316 if (r->h->family == FW3_FAMILY_V6)
1320 for (m = r->matches; m; m = m->next)
1321 s += SZ(ip6t_entry_match) + m->match->size;
1323 s += SZ(ip6t_entry_target);
1325 s += r->target->size;
1327 mask = fw3_alloc(s);
1328 memset(mask, 0xFF, SZ(ip6t_entry));
1329 p = mask + SZ(ip6t_entry);
1331 for (m = r->matches; m; m = m->next)
1333 memset(p, 0xFF, SZ(ip6t_entry_match) + m->match->userspacesize);
1334 p += SZ(ip6t_entry_match) + m->match->size;
1337 memset(p, 0xFF, SZ(ip6t_entry_target) + (r->target) ? r->target->userspacesize : 0);
1344 for (m = r->matches; m; m = m->next)
1345 s += SZ(ipt_entry_match) + m->match->size;
1347 s += SZ(ipt_entry_target);
1349 s += r->target->size;
1351 mask = fw3_alloc(s);
1352 memset(mask, 0xFF, SZ(ipt_entry));
1353 p = mask + SZ(ipt_entry);
1355 for (m = r->matches; m; m = m->next)
1357 memset(p, 0xFF, SZ(ipt_entry_match) + m->match->userspacesize);
1358 p += SZ(ipt_entry_match) + m->match->size;
1361 memset(p, 0xFF, SZ(ipt_entry_target) + (r->target) ? r->target->userspacesize : 0);
1368 rule_build(struct fw3_ipt_rule *r)
1370 size_t s, target_size = (r->target) ? r->target->t->u.target_size : 0;
1371 struct xtables_rule_match *m;
1373 #ifndef DISABLE_IPV6
1374 if (r->h->family == FW3_FAMILY_V6)
1376 struct ip6t_entry *e6;
1378 s = XT_ALIGN(sizeof(struct ip6t_entry));
1380 for (m = r->matches; m; m = m->next)
1381 s += m->match->m->u.match_size;
1383 e6 = fw3_alloc(s + target_size);
1385 memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
1387 e6->target_offset = s;
1388 e6->next_offset = s + target_size;
1392 for (m = r->matches; m; m = m->next)
1394 memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
1395 s += m->match->m->u.match_size;
1399 memcpy(e6->elems + s, r->target->t, target_size);
1406 struct ipt_entry *e;
1408 s = XT_ALIGN(sizeof(struct ipt_entry));
1410 for (m = r->matches; m; m = m->next)
1411 s += m->match->m->u.match_size;
1413 e = fw3_alloc(s + target_size);
1415 memcpy(e, &r->e, sizeof(struct ipt_entry));
1417 e->target_offset = s;
1418 e->next_offset = s + target_size;
1422 for (m = r->matches; m; m = m->next)
1424 memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
1425 s += m->match->m->u.match_size;
1429 memcpy(e->elems + s, r->target->t, target_size);
1436 set_rule_tag(struct fw3_ipt_rule *r)
1440 const char *tag = "!fw3";
1442 for (i = 0; i < r->argc; i++)
1443 if (!strcmp(r->argv[i], "--comment") && (i + 1) < r->argc)
1444 if (asprintf(&p, "%s: %s", tag, r->argv[i + 1]) > 0)
1446 free(r->argv[i + 1]);
1451 tmp = realloc(r->argv, (r->argc + 4) * sizeof(*r->argv));
1456 r->argv[r->argc++] = fw3_strdup("-m");
1457 r->argv[r->argc++] = fw3_strdup("comment");
1458 r->argv[r->argc++] = fw3_strdup("--comment");
1459 r->argv[r->argc++] = fw3_strdup(tag);
1464 __fw3_ipt_rule_append(struct fw3_ipt_rule *r, bool repl, const char *fmt, ...)
1467 unsigned char *mask;
1469 struct xtables_rule_match *m;
1470 struct xtables_match *em;
1471 struct xtables_target *et;
1472 struct xtables_globals *g;
1480 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1483 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
1484 g->opts = g->orig_opts;
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;