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' },
25 { .name = "append", .has_arg = 1, .val = 'A' },
29 static struct xtables_globals xtg = {
31 .program_version = "4",
32 .orig_opts = base_opts,
35 static struct xtables_globals xtg6 = {
37 .program_version = "6",
38 .orig_opts = base_opts,
41 /* Required by certain extensions like SNAT and DNAT */
45 get_kernel_version(void)
47 static struct utsname uts;
48 int x = 0, y = 0, z = 0;
50 if (uname(&uts) == -1)
51 sprintf(uts.release, "3.0.0");
53 sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
54 kernel_version = LINUX_VERSION(x, y, z);
57 static void fw3_init_extensions(void)
64 libipt_MASQUERADE_init();
65 libipt_REDIRECT_init();
69 libxt_conntrack_init();
77 libxt_standard_init();
84 struct fw3_ipt_handle *
85 fw3_ipt_open(enum fw3_family family, enum fw3_table table)
87 struct fw3_ipt_handle *h;
89 h = fw3_alloc(sizeof(*h));
93 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);
104 h->family = FW3_FAMILY_V4;
106 h->handle = iptc_init(fw3_flag_names[table]);
108 xtables_set_params(&xtg);
109 xtables_set_nfproto(NFPROTO_IPV4);
118 xtables_pending_matches = NULL;
119 xtables_pending_targets = NULL;
121 xtables_matches = NULL;
122 xtables_targets = NULL;
124 fw3_init_extensions();
130 debug(struct fw3_ipt_handle *h, const char *fmt, ...)
134 printf("%s -t %s ", (h->family == FW3_FAMILY_V6) ? "ip6tables" : "iptables",
135 fw3_flag_names[h->table]);
143 fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
144 enum fw3_flag policy)
147 debug(h, "-P %s %s\n", chain, fw3_flag_names[policy]);
149 if (h->family == FW3_FAMILY_V6)
150 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_delete_chain(struct fw3_ipt_handle *h, const char *chain)
160 debug(h, "-F %s\n", chain);
161 debug(h, "-X %s\n", chain);
164 if (h->family == FW3_FAMILY_V6)
166 if (ip6tc_flush_entries(chain, h->handle))
167 ip6tc_delete_chain(chain, h->handle);
171 if (iptc_flush_entries(chain, h->handle))
172 iptc_delete_chain(chain, h->handle);
177 fw3_ipt_delete_rules(struct fw3_ipt_handle *h, const char *target)
180 const struct ipt_entry *e;
181 const struct ip6t_entry *e6;
186 if (h->family == FW3_FAMILY_V6)
188 for (chain = ip6tc_first_chain(h->handle);
190 chain = ip6tc_next_chain(h->handle))
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);
216 for (chain = iptc_first_chain(h->handle);
218 chain = iptc_next_chain(h->handle))
223 for (num = 0, e = iptc_first_rule(chain, h->handle);
225 num++, e = iptc_next_rule(e, h->handle))
227 t = iptc_get_target(e, h->handle);
229 if (*t && !strcmp(t, target))
232 debug(h, "-D %s %u\n", chain, num + 1);
234 iptc_delete_num_entry(chain, num, 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)
265 if (h->family == FW3_FAMILY_V6)
267 for (chain = ip6tc_first_chain(h->handle);
269 chain = ip6tc_next_chain(h->handle))
271 ip6tc_flush_entries(chain, h->handle);
274 for (chain = ip6tc_first_chain(h->handle);
276 chain = ip6tc_next_chain(h->handle))
278 ip6tc_delete_chain(chain, h->handle);
283 for (chain = iptc_first_chain(h->handle);
285 chain = iptc_next_chain(h->handle))
287 iptc_flush_entries(chain, h->handle);
290 for (chain = iptc_first_chain(h->handle);
292 chain = iptc_next_chain(h->handle))
294 iptc_delete_chain(chain, h->handle);
300 fw3_ipt_commit(struct fw3_ipt_handle *h)
304 if (h->family == FW3_FAMILY_V6)
306 rv = ip6tc_commit(h->handle);
308 fprintf(stderr, "ip6tc_commit(): %s\n", ip6tc_strerror(errno));
312 rv = iptc_commit(h->handle);
314 fprintf(stderr, "iptc_commit(): %s\n", iptc_strerror(errno));
320 struct fw3_ipt_rule *
321 fw3_ipt_rule_new(struct fw3_ipt_handle *h)
323 struct fw3_ipt_rule *r;
325 r = fw3_alloc(sizeof(*r));
328 r->argv = fw3_alloc(sizeof(char *));
329 r->argv[r->argc++] = "fw3";
336 is_chain(struct fw3_ipt_handle *h, const char *name)
338 if (h->family == FW3_FAMILY_V6)
339 return ip6tc_is_chain(name, h->handle);
341 return iptc_is_chain(name, h->handle);
345 get_protoname(struct fw3_ipt_rule *r)
347 const struct xtables_pprot *pp;
350 for (pp = xtables_chain_protos; pp->name; pp++)
351 if (pp->num == r->protocol)
352 return (char *)pp->name;
357 static struct xtables_match *
358 find_match(struct fw3_ipt_rule *r, const char *name)
360 return xtables_find_match(name, XTF_TRY_LOAD, &r->matches);
364 init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
367 struct xtables_globals *g;
372 s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
375 strcpy(m->m->u.user.name, m->real_name ? m->real_name : m->name);
376 m->m->u.user.revision = m->revision;
377 m->m->u.match_size = s;
379 /* free previous userspace data */
383 m->udata = fw3_alloc(m->udata_size);
389 /* don't merge options if no_clone is set and this match is a clone */
390 if (no_clone && (m == m->next))
393 /* merge option table */
394 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
397 g->opts = xtables_options_xfrm(g->orig_opts, g->opts,
398 m->x6_options, &m->option_offset);
401 g->opts = xtables_merge_options(g->orig_opts, g->opts,
402 m->extra_opts, &m->option_offset);
406 need_protomatch(struct fw3_ipt_rule *r, const char *pname)
411 if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
414 return !r->protocol_loaded;
417 static struct xtables_match *
418 load_protomatch(struct fw3_ipt_rule *r)
420 const char *pname = get_protoname(r);
422 if (!need_protomatch(r, pname))
425 return find_match(r, pname);
428 static struct xtables_target *
429 get_target(struct fw3_ipt_rule *r, const char *name)
432 struct xtables_target *t;
433 struct xtables_globals *g;
435 bool chain = is_chain(r->h, name);
438 t = xtables_find_target(XT_STANDARD_TARGET, XTF_LOAD_MUST_SUCCEED);
440 t = xtables_find_target(name, XTF_TRY_LOAD);
445 s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
449 strcpy(t->t->u.user.name, name);
451 strcpy(t->t->u.user.name, t->real_name);
453 t->t->u.user.revision = t->revision;
454 t->t->u.target_size = s;
459 t->udata = fw3_alloc(t->udata_size);
465 /* merge option table */
466 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
469 g->opts = xtables_options_xfrm(g->orig_opts, g->opts,
470 t->x6_options, &t->option_offset);
472 g->opts = xtables_merge_options(g->orig_opts, g->opts,
473 t->extra_opts, &t->option_offset);
481 fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
485 if (!proto || proto->any)
488 pr = proto->protocol;
490 if (r->h->family == FW3_FAMILY_V6)
495 r->e6.ipv6.proto = pr;
496 r->e6.ipv6.flags |= IP6T_F_PROTO;
499 r->e6.ipv6.invflags |= XT_INV_PROTO;
506 r->e.ip.invflags |= XT_INV_PROTO;
513 fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
514 struct fw3_device *in, struct fw3_device *out)
516 if (r->h->family == FW3_FAMILY_V6)
520 xtables_parse_interface(in->name, r->e6.ipv6.iniface,
521 r->e6.ipv6.iniface_mask);
524 r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
527 if (out && !out->any)
529 xtables_parse_interface(out->name, r->e6.ipv6.outiface,
530 r->e6.ipv6.outiface_mask);
533 r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
540 xtables_parse_interface(in->name, r->e.ip.iniface,
541 r->e.ip.iniface_mask);
544 r->e.ip.invflags |= IPT_INV_VIA_IN;
547 if (out && !out->any)
549 xtables_parse_interface(out->name, r->e.ip.outiface,
550 r->e.ip.outiface_mask);
553 r->e.ip.invflags |= IPT_INV_VIA_OUT;
560 ip4prefix2mask(int prefix, struct in_addr *mask)
562 mask->s_addr = htonl(~((1 << (32 - prefix)) - 1));
566 ip6prefix2mask(int prefix, struct in6_addr *mask)
568 char *p = (char *)mask;
572 memset(p, 0xff, prefix / 8);
573 memset(p + (prefix / 8) + 1, 0, (128 - prefix) / 8);
574 p[prefix / 8] = 0xff << (8 - (prefix & 7));
578 memset(mask, 0, sizeof(*mask));
583 fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
584 struct fw3_address *src, struct fw3_address *dest)
588 if ((src && src->range) || (dest && dest->range))
590 fw3_ipt_rule_addarg(r, false, "-m", "iprange");
597 fw3_ipt_rule_addarg(r, src->invert, "--src-range",
598 fw3_address_to_string(src, false));
600 else if (r->h->family == FW3_FAMILY_V6)
602 r->e6.ipv6.src = src->address.v6;
603 ip6prefix2mask(src->mask, &r->e6.ipv6.smsk);
605 for (i = 0; i < 4; i++)
606 r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
609 r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
613 r->e.ip.src = src->address.v4;
614 ip4prefix2mask(src->mask, &r->e.ip.smsk);
616 r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
619 r->e.ip.invflags |= IPT_INV_SRCIP;
623 if (dest && dest->set)
627 fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
628 fw3_address_to_string(dest, false));
630 else if (r->h->family == FW3_FAMILY_V6)
632 r->e6.ipv6.dst = dest->address.v6;
633 ip6prefix2mask(dest->mask, &r->e6.ipv6.dmsk);
635 for (i = 0; i < 4; i++)
636 r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
639 r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
643 r->e.ip.dst = dest->address.v4;
644 ip4prefix2mask(dest->mask, &r->e.ip.dmsk);
646 r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
649 r->e.ip.invflags |= IPT_INV_DSTIP;
655 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
656 struct fw3_port *sp, struct fw3_port *dp)
658 char buf[sizeof("65535:65535\0")];
660 if ((!sp || !sp->set) && (!dp || !dp->set))
663 if (!get_protoname(r))
668 if (sp->port_min == sp->port_max)
669 sprintf(buf, "%u", sp->port_min);
671 sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
673 fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
678 if (dp->port_min == dp->port_max)
679 sprintf(buf, "%u", dp->port_min);
681 sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
683 fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
688 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
693 fw3_ipt_rule_addarg(r, false, "-m", "mac");
694 fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", ether_ntoa(&mac->mac));
698 fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
700 char buf[sizeof("255/255\0")];
705 if (r->h->family == FW3_FAMILY_V6)
707 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
708 sprintf(buf, "%u", icmp->type6);
710 sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
712 fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
716 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
717 sprintf(buf, "%u", icmp->type);
719 sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
721 fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
726 fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
728 char buf[sizeof("-4294967296/second\0")];
730 if (!limit || limit->rate <= 0)
733 fw3_ipt_rule_addarg(r, false, "-m", "limit");
735 sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
736 fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
738 if (limit->burst > 0)
740 sprintf(buf, "%u", limit->burst);
741 fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
746 fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_ipset *ipset,
749 char buf[sizeof("dst,dst,dst\0")];
752 struct fw3_ipset_datatype *type;
757 list_for_each_entry(type, &ipset->datatypes, list)
762 p += sprintf(p, "%s", type->dest ? "dst" : "src");
765 fw3_ipt_rule_addarg(r, false, "-m", "set");
767 fw3_ipt_rule_addarg(r, invert, "--match-set",
768 ipset->external ? ipset->external : ipset->name);
770 fw3_ipt_rule_addarg(r, false, buf, NULL);
774 fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
777 struct tm empty = { 0 };
779 char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
782 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
783 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
785 if (!d1 && !d2 && !time->timestart && !time->timestop &&
786 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
791 fw3_ipt_rule_addarg(r, false, "-m", "time");
794 fw3_ipt_rule_addarg(r, false, "--utc", NULL);
798 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
799 fw3_ipt_rule_addarg(r, false, "--datestart", buf);
804 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
805 fw3_ipt_rule_addarg(r, false, "--datestop", buf);
810 sprintf(buf, "%02d:%02d:%02d",
811 time->timestart / 3600,
812 time->timestart % 3600 / 60,
813 time->timestart % 60);
815 fw3_ipt_rule_addarg(r, false, "--timestart", buf);
820 sprintf(buf, "%02d:%02d:%02d",
821 time->timestop / 3600,
822 time->timestop % 3600 / 60,
823 time->timestop % 60);
825 fw3_ipt_rule_addarg(r, false, "--timestop", buf);
828 if (time->monthdays & 0xFFFFFFFE)
830 for (i = 1, p = buf; i < 32; i++)
832 if (hasbit(time->monthdays, i))
837 p += sprintf(p, "%u", i);
841 fw3_ipt_rule_addarg(r, hasbit(time->monthdays, 0), "--monthdays", buf);
844 if (time->weekdays & 0xFE)
846 for (i = 1, p = buf; i < 8; i++)
848 if (hasbit(time->weekdays, i))
853 p += sprintf(p, "%u", i);
857 fw3_ipt_rule_addarg(r, hasbit(time->weekdays, 0), "--weekdays", buf);
862 fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
864 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
866 if (!mark || !mark->set)
869 if (mark->mask < 0xFFFFFFFF)
870 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
872 sprintf(buf, "0x%x", mark->mark);
874 fw3_ipt_rule_addarg(r, false, "-m", "mark");
875 fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
879 fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
888 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
891 fw3_ipt_rule_addarg(r, false, "-m", "comment");
892 fw3_ipt_rule_addarg(r, false, "--comment", buf);
896 fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
900 if (!extra || !*extra)
903 s = fw3_strdup(extra);
905 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
907 tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
913 r->argv[r->argc++] = fw3_strdup(p);
920 rule_print6(struct ip6t_entry *e)
922 char buf[INET6_ADDRSTRLEN];
925 if (e->ipv6.flags & IP6T_F_PROTO)
927 if (e->ipv6.flags & XT_INV_PROTO)
930 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
933 printf(" -p %s", pname);
935 printf(" -p %u", e->ipv6.proto);
938 if (e->ipv6.iniface[0])
940 if (e->ipv6.flags & IP6T_INV_VIA_IN)
943 printf(" -i %s", e->ipv6.iniface);
946 if (e->ipv6.outiface[0])
948 if (e->ipv6.flags & IP6T_INV_VIA_OUT)
951 printf(" -o %s", e->ipv6.outiface);
954 if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
956 if (e->ipv6.flags & IP6T_INV_SRCIP)
959 printf(" -s %s/%u", inet_ntop(AF_INET6, &e->ipv6.src, buf, sizeof(buf)),
960 xtables_ip6mask_to_cidr(&e->ipv6.smsk));
963 if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
965 if (e->ipv6.flags & IP6T_INV_DSTIP)
968 printf(" -d %s/%u", inet_ntop(AF_INET6, &e->ipv6.dst, buf, sizeof(buf)),
969 xtables_ip6mask_to_cidr(&e->ipv6.dmsk));
974 rule_print4(struct ipt_entry *e)
976 struct in_addr in_zero = { 0 };
977 char buf[sizeof("255.255.255.255\0")];
982 if (e->ip.flags & XT_INV_PROTO)
985 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
988 printf(" -p %s", pname);
990 printf(" -p %u", e->ip.proto);
993 if (e->ip.iniface[0])
995 if (e->ip.flags & IPT_INV_VIA_IN)
998 printf(" -i %s", e->ip.iniface);
1001 if (e->ip.outiface[0])
1003 if (e->ip.flags & IPT_INV_VIA_OUT)
1006 printf(" -o %s", e->ip.outiface);
1009 if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
1011 if (e->ip.flags & IPT_INV_SRCIP)
1014 printf(" -s %s/%u", inet_ntop(AF_INET, &e->ip.src, buf, sizeof(buf)),
1015 xtables_ipmask_to_cidr(&e->ip.smsk));
1018 if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
1020 if (e->ip.flags & IPT_INV_DSTIP)
1023 printf(" -d %s/%u", inet_ntop(AF_INET, &e->ip.dst, buf, sizeof(buf)),
1024 xtables_ipmask_to_cidr(&e->ip.dmsk));
1029 rule_print(struct fw3_ipt_rule *r, const char *chain)
1031 struct xtables_rule_match *rm;
1032 struct xtables_match *m;
1033 struct xtables_target *t;
1035 debug(r->h, "-A %s", chain);
1037 if (r->h->family == FW3_FAMILY_V6)
1038 rule_print6(&r->e6);
1042 for (rm = r->matches; rm; rm = rm->next)
1045 printf(" -m %s", m->alias ? m->alias(m->m) : m->m->u.user.name);
1048 m->save(&r->e.ip, m->m);
1054 printf(" -j %s", t->alias ? t->alias(t->t) : t->t->u.user.name);
1057 t->save(&r->e.ip, t->t);
1064 parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
1066 struct xtables_rule_match *m;
1067 struct xtables_match *em;
1069 /* is a target option */
1070 if (r->target && (r->target->parse || r->target->x6_parse) &&
1071 optc >= r->target->option_offset &&
1072 optc < (r->target->option_offset + 256))
1074 xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
1078 /* try to dispatch argument to one of the match parsers */
1079 for (m = r->matches; m; m = m->next)
1083 if (m->completed || (!em->parse && !em->x6_parse))
1086 if (optc < em->option_offset ||
1087 optc >= (em->option_offset + 256))
1090 xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
1094 /* unhandled option, might belong to a protocol match */
1095 if ((em = load_protomatch(r)) != NULL)
1097 init_match(r, em, false);
1099 r->protocol_loaded = true;
1106 fprintf(stderr, "parse_option(): option '%s' needs argument\n",
1110 fprintf(stderr, "parse_option(): unknown option '%s'\n",
1117 fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
1118 const char *k, const char *v)
1126 n = inv + !!k + !!v;
1127 tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
1135 r->argv[r->argc++] = fw3_strdup("!");
1137 r->argv[r->argc++] = fw3_strdup(k);
1140 r->argv[r->argc++] = fw3_strdup(v);
1144 fw3_ipt_rule_append(struct fw3_ipt_rule *r, const char *fmt, ...)
1147 struct xtables_rule_match *m;
1148 struct xtables_match *em;
1149 struct xtables_target *et;
1150 struct xtables_globals *g;
1151 struct ipt_entry *e;
1152 struct ip6t_entry *e6;
1160 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1163 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
1164 g->opts = g->orig_opts;
1169 while ((optc = getopt_long(r->argc, r->argv, "m:j:", g->opts, NULL)) != -1)
1174 em = find_match(r, optarg);
1178 fprintf(stderr, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg);
1182 init_match(r, em, true);
1186 et = get_target(r, optarg);
1190 fprintf(stderr, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg);
1197 if ((optarg[0] == '!') && (optarg[1] == '\0'))
1203 fprintf(stderr, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg);
1207 if (parse_option(r, optc, inv))
1215 for (m = r->matches; m; m = m->next)
1216 xtables_option_mfcall(m->match);
1219 xtables_option_tfcall(r->target);
1224 if (r->h->family == FW3_FAMILY_V6)
1226 s = XT_ALIGN(sizeof(struct ip6t_entry));
1228 for (m = r->matches; m; m = m->next)
1229 s += m->match->m->u.match_size;
1231 e6 = fw3_alloc(s + r->target->t->u.target_size);
1233 memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
1235 e6->target_offset = s;
1236 e6->next_offset = s + r->target->t->u.target_size;
1240 for (m = r->matches; m; m = m->next)
1242 memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
1243 s += m->match->m->u.match_size;
1246 memcpy(e6->elems + s, r->target->t, r->target->t->u.target_size);
1247 ip6tc_append_entry(buf, e6, r->h->handle);
1252 s = XT_ALIGN(sizeof(struct ipt_entry));
1254 for (m = r->matches; m; m = m->next)
1255 s += m->match->m->u.match_size;
1257 e = fw3_alloc(s + r->target->t->u.target_size);
1259 memcpy(e, &r->e, sizeof(struct ipt_entry));
1261 e->target_offset = s;
1262 e->next_offset = s + r->target->t->u.target_size;
1266 for (m = r->matches; m; m = m->next)
1268 memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
1269 s += m->match->m->u.match_size;
1272 memcpy(e->elems + s, r->target->t, r->target->t->u.target_size);
1274 if (!iptc_append_entry(buf, e, r->h->handle))
1275 fprintf(stderr, "iptc_append_entry(): %s\n", iptc_strerror(errno));
1280 for (i = 1; i < r->argc; i++)
1285 xtables_rule_matches_free(&r->matches);
1290 /* reset all targets and matches */
1291 for (em = xtables_matches; em; em = em->next)
1294 for (et = xtables_targets; et; et = et->next)
1300 xtables_free_opts(1);
1303 struct fw3_ipt_rule *
1304 fw3_ipt_rule_create(struct fw3_ipt_handle *handle, struct fw3_protocol *proto,
1305 struct fw3_device *in, struct fw3_device *out,
1306 struct fw3_address *src, struct fw3_address *dest)
1308 struct fw3_ipt_rule *r;
1310 r = fw3_ipt_rule_new(handle);
1312 fw3_ipt_rule_proto(r, proto);
1313 fw3_ipt_rule_in_out(r, in, out);
1314 fw3_ipt_rule_src_dest(r, src, dest);