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,
40 /* Required by certain extensions like SNAT and DNAT */
41 int kernel_version = 0;
44 get_kernel_version(void)
46 static struct utsname uts;
47 int x = 0, y = 0, z = 0;
49 if (uname(&uts) == -1)
50 sprintf(uts.release, "3.0.0");
52 sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
53 kernel_version = 0x10000 * x + 0x100 * y + z;
56 static void fw3_init_extensions(void)
66 struct fw3_ipt_handle *
67 fw3_ipt_open(enum fw3_family family, enum fw3_table table)
69 struct fw3_ipt_handle *h;
71 h = fw3_alloc(sizeof(*h));
75 if (family == FW3_FAMILY_V6)
78 h->family = FW3_FAMILY_V6;
80 h->handle = ip6tc_init(fw3_flag_names[table]);
82 xtables_set_params(&xtg6);
83 xtables_set_nfproto(NFPROTO_IPV6);
88 h->family = FW3_FAMILY_V4;
90 h->handle = iptc_init(fw3_flag_names[table]);
92 xtables_set_params(&xtg);
93 xtables_set_nfproto(NFPROTO_IPV4);
103 fw3_init_extensions();
109 debug(struct fw3_ipt_handle *h, const char *fmt, ...)
113 printf("%s -t %s ", (h->family == FW3_FAMILY_V6) ? "ip6tables" : "iptables",
114 fw3_flag_names[h->table]);
122 fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
123 enum fw3_flag policy)
126 debug(h, "-P %s %s\n", chain, fw3_flag_names[policy]);
129 if (h->family == FW3_FAMILY_V6)
130 ip6tc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
133 iptc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
137 fw3_ipt_flush_chain(struct fw3_ipt_handle *h, const char *chain)
140 debug(h, "-F %s\n", chain);
143 if (h->family == FW3_FAMILY_V6)
144 ip6tc_flush_entries(chain, h->handle);
147 iptc_flush_entries(chain, h->handle);
151 delete_rules(struct fw3_ipt_handle *h, const char *target)
154 const struct ipt_entry *e;
160 if (h->family == FW3_FAMILY_V6)
162 for (chain = ip6tc_first_chain(h->handle);
164 chain = ip6tc_next_chain(h->handle))
169 const struct ip6t_entry *e6;
170 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
172 num++, e6 = ip6tc_next_rule(e6, h->handle))
174 t = ip6tc_get_target(e6, h->handle);
176 if (*t && !strcmp(t, target))
179 debug(h, "-D %s %u\n", chain, num + 1);
181 ip6tc_delete_num_entry(chain, num, h->handle);
192 for (chain = iptc_first_chain(h->handle);
194 chain = iptc_next_chain(h->handle))
199 for (num = 0, e = iptc_first_rule(chain, h->handle);
201 num++, e = iptc_next_rule(e, h->handle))
203 t = iptc_get_target(e, h->handle);
205 if (*t && !strcmp(t, target))
208 debug(h, "-D %s %u\n", chain, num + 1);
210 iptc_delete_num_entry(chain, num, h->handle);
221 fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain)
223 delete_rules(h, chain);
226 debug(h, "-X %s\n", chain);
229 if (h->family == FW3_FAMILY_V6)
230 ip6tc_delete_chain(chain, h->handle);
233 iptc_delete_chain(chain, h->handle);
237 get_rule_id(const void *base, unsigned int start, unsigned int end)
241 const struct xt_entry_match *em;
243 for (i = start; i < end; i += em->u.match_size)
247 if (strcmp(em->u.user.name, "id"))
250 memcpy(&id, em->data, sizeof(id));
252 if ((id & FW3_ID_MASK) != FW3_ID_MAGIC)
255 return (id & ~FW3_ID_MASK);
262 fw3_ipt_delete_id_rules(struct fw3_ipt_handle *h, const char *chain)
265 const struct ipt_entry *e;
270 if (h->family == FW3_FAMILY_V6)
272 if (!ip6tc_is_chain(chain, h->handle))
278 const struct ip6t_entry *e6;
279 for (num = 0, e6 = ip6tc_first_rule(chain, h->handle);
281 num++, e6 = ip6tc_next_rule(e6, h->handle))
283 id = get_rule_id(e6, sizeof(*e6), e6->target_offset);
288 debug(h, "-D %s %u\n", chain, num + 1);
290 ip6tc_delete_num_entry(chain, num, h->handle);
300 if (!iptc_is_chain(chain, h->handle))
306 for (num = 0, e = iptc_first_rule(chain, h->handle);
308 num++, e = iptc_next_rule(e, h->handle))
310 id = get_rule_id(e, sizeof(*e), e->target_offset);
315 debug(h, "-D %s %u\n", chain, num + 1);
317 iptc_delete_num_entry(chain, num, h->handle);
327 fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...)
333 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
337 debug(h, "-N %s\n", buf);
339 iptc_create_chain(buf, h->handle);
343 fw3_ipt_flush(struct fw3_ipt_handle *h)
348 if (h->family == FW3_FAMILY_V6)
350 for (chain = ip6tc_first_chain(h->handle);
352 chain = ip6tc_next_chain(h->handle))
354 ip6tc_flush_entries(chain, h->handle);
357 for (chain = ip6tc_first_chain(h->handle);
359 chain = ip6tc_next_chain(h->handle))
361 ip6tc_delete_chain(chain, h->handle);
367 for (chain = iptc_first_chain(h->handle);
369 chain = iptc_next_chain(h->handle))
371 iptc_flush_entries(chain, h->handle);
374 for (chain = iptc_first_chain(h->handle);
376 chain = iptc_next_chain(h->handle))
378 iptc_delete_chain(chain, h->handle);
384 chain_is_empty(struct fw3_ipt_handle *h, const char *chain)
387 if (h->family == FW3_FAMILY_V6)
388 return (!ip6tc_builtin(chain, h->handle) &&
389 !ip6tc_first_rule(chain, h->handle));
392 return (!iptc_builtin(chain, h->handle) &&
393 !iptc_first_rule(chain, h->handle));
397 fw3_ipt_gc(struct fw3_ipt_handle *h)
403 if (h->family == FW3_FAMILY_V6)
408 for (chain = ip6tc_first_chain(h->handle);
410 chain = ip6tc_next_chain(h->handle))
412 if (!chain_is_empty(h, chain))
415 fw3_ipt_delete_chain(h, chain);
427 for (chain = iptc_first_chain(h->handle);
429 chain = iptc_next_chain(h->handle))
431 warn("C=%s\n", chain);
433 if (!chain_is_empty(h, chain))
436 warn("D=%s\n", chain);
438 fw3_ipt_delete_chain(h, chain);
447 fw3_ipt_commit(struct fw3_ipt_handle *h)
452 if (h->family == FW3_FAMILY_V6)
454 rv = ip6tc_commit(h->handle);
456 warn("ip6tc_commit(): %s", ip6tc_strerror(errno));
461 rv = iptc_commit(h->handle);
463 warn("iptc_commit(): %s", iptc_strerror(errno));
468 fw3_ipt_close(struct fw3_ipt_handle *h)
475 dlclose(h->libv[h->libc]);
484 struct fw3_ipt_rule *
485 fw3_ipt_rule_new(struct fw3_ipt_handle *h)
487 struct fw3_ipt_rule *r;
489 r = fw3_alloc(sizeof(*r));
493 r->argv = fw3_alloc(sizeof(char *));
494 r->argv[r->argc++] = "fw3";
501 is_chain(struct fw3_ipt_handle *h, const char *name)
504 if (h->family == FW3_FAMILY_V6)
505 return ip6tc_is_chain(name, h->handle);
508 return iptc_is_chain(name, h->handle);
512 get_protoname(struct fw3_ipt_rule *r)
514 const struct xtables_pprot *pp;
517 for (pp = xtables_chain_protos; pp->name; pp++)
518 if (pp->num == r->protocol)
519 return (char *)pp->name;
525 load_extension(struct fw3_ipt_handle *h, const char *name)
529 const char *pfx = (h->family == FW3_FAMILY_V6) ? "libip6t" : "libipt";
531 snprintf(path, sizeof(path), "/usr/lib/iptables/libxt_%s.so", name);
532 if (!(lib = dlopen(path, RTLD_NOW)))
534 snprintf(path, sizeof(path), "/usr/lib/iptables/%s_%s.so", pfx, name);
535 lib = dlopen(path, RTLD_NOW);
541 tmp = realloc(h->libv, sizeof(lib) * (h->libc + 1));
547 h->libv[h->libc++] = lib;
552 static struct xtables_match *
553 find_match(struct fw3_ipt_rule *r, const char *name)
555 struct xtables_match *m;
557 m = xtables_find_match(name, XTF_DONT_LOAD, &r->matches);
559 if (!m && load_extension(r->h, name))
560 m = xtables_find_match(name, XTF_DONT_LOAD, &r->matches);
566 init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
569 struct xtables_globals *g;
574 s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
578 fw3_xt_set_match_name(m);
580 m->m->u.user.revision = m->revision;
581 m->m->u.match_size = s;
583 /* free previous userspace data */
584 fw3_xt_free_match_udata(m);
589 /* don't merge options if no_clone is set and this match is a clone */
590 if (no_clone && (m == m->next))
593 /* merge option table */
594 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
595 fw3_xt_merge_match_options(g, m);
599 need_protomatch(struct fw3_ipt_rule *r, const char *pname)
604 if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
607 return !r->protocol_loaded;
610 static struct xtables_match *
611 load_protomatch(struct fw3_ipt_rule *r)
613 const char *pname = get_protoname(r);
615 if (!need_protomatch(r, pname))
618 return find_match(r, pname);
621 static struct xtables_target *
622 find_target(struct fw3_ipt_rule *r, const char *name)
624 struct xtables_target *t;
626 if (is_chain(r->h, name))
627 return xtables_find_target(XT_STANDARD_TARGET, XTF_LOAD_MUST_SUCCEED);
629 t = xtables_find_target(name, XTF_DONT_LOAD);
631 if (!t && load_extension(r->h, name))
632 t = xtables_find_target(name, XTF_DONT_LOAD);
637 static struct xtables_target *
638 get_target(struct fw3_ipt_rule *r, const char *name)
641 struct xtables_target *t;
642 struct xtables_globals *g;
644 t = find_target(r, name);
649 s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
652 fw3_xt_set_target_name(t, name);
654 t->t->u.user.revision = t->revision;
655 t->t->u.target_size = s;
657 /* free previous userspace data */
658 fw3_xt_free_target_udata(t);
663 /* merge option table */
664 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
665 fw3_xt_merge_target_options(g, t);
673 fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
677 if (!proto || proto->any)
680 pr = proto->protocol;
683 if (r->h->family == FW3_FAMILY_V6)
688 r->e6.ipv6.proto = pr;
689 r->e6.ipv6.flags |= IP6T_F_PROTO;
692 r->e6.ipv6.invflags |= XT_INV_PROTO;
700 r->e.ip.invflags |= XT_INV_PROTO;
707 fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
708 struct fw3_device *in, struct fw3_device *out)
711 if (r->h->family == FW3_FAMILY_V6)
715 xtables_parse_interface(in->name, r->e6.ipv6.iniface,
716 r->e6.ipv6.iniface_mask);
719 r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
722 if (out && !out->any)
724 xtables_parse_interface(out->name, r->e6.ipv6.outiface,
725 r->e6.ipv6.outiface_mask);
728 r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
736 xtables_parse_interface(in->name, r->e.ip.iniface,
737 r->e.ip.iniface_mask);
740 r->e.ip.invflags |= IPT_INV_VIA_IN;
743 if (out && !out->any)
745 xtables_parse_interface(out->name, r->e.ip.outiface,
746 r->e.ip.outiface_mask);
749 r->e.ip.invflags |= IPT_INV_VIA_OUT;
756 fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
757 struct fw3_address *src, struct fw3_address *dest)
759 if ((src && src->range) || (dest && dest->range))
761 fw3_ipt_rule_addarg(r, false, "-m", "iprange");
768 fw3_ipt_rule_addarg(r, src->invert, "--src-range",
769 fw3_address_to_string(src, false, false));
772 else if (r->h->family == FW3_FAMILY_V6)
774 r->e6.ipv6.src = src->address.v6;
775 r->e6.ipv6.smsk = src->mask.v6;
778 for (i = 0; i < 4; i++)
779 r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
782 r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
787 r->e.ip.src = src->address.v4;
788 r->e.ip.smsk = src->mask.v4;
790 r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
793 r->e.ip.invflags |= IPT_INV_SRCIP;
797 if (dest && dest->set)
801 fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
802 fw3_address_to_string(dest, false, false));
805 else if (r->h->family == FW3_FAMILY_V6)
807 r->e6.ipv6.dst = dest->address.v6;
808 r->e6.ipv6.dmsk = dest->mask.v6;
811 for (i = 0; i < 4; i++)
812 r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
815 r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
820 r->e.ip.dst = dest->address.v4;
821 r->e.ip.dmsk = dest->mask.v4;
823 r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
826 r->e.ip.invflags |= IPT_INV_DSTIP;
832 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
833 struct fw3_port *sp, struct fw3_port *dp)
835 char buf[sizeof("65535:65535\0")];
837 if ((!sp || !sp->set) && (!dp || !dp->set))
840 if (!get_protoname(r))
845 if (sp->port_min == sp->port_max)
846 sprintf(buf, "%u", sp->port_min);
848 sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
850 fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
855 if (dp->port_min == dp->port_max)
856 sprintf(buf, "%u", dp->port_min);
858 sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
860 fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
865 fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out)
868 struct fw3_device dev = { .any = false };
869 strncpy(dev.name, device, sizeof(dev.name) - 1);
870 fw3_ipt_rule_in_out(r, (out) ? NULL : &dev, (out) ? &dev : NULL);
875 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
877 char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
878 uint8_t *addr = mac->mac.ether_addr_octet;
883 sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
884 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
886 fw3_ipt_rule_addarg(r, false, "-m", "mac");
887 fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", buf);
891 fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
893 char buf[sizeof("255/255\0")];
899 if (r->h->family == FW3_FAMILY_V6)
901 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
902 sprintf(buf, "%u", icmp->type6);
904 sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
906 fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
911 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
912 sprintf(buf, "%u", icmp->type);
914 sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
916 fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
921 fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
923 char buf[sizeof("-4294967296/second\0")];
925 if (!limit || limit->rate <= 0)
928 fw3_ipt_rule_addarg(r, false, "-m", "limit");
930 sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
931 fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
933 if (limit->burst > 0)
935 sprintf(buf, "%u", limit->burst);
936 fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
941 fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_setmatch *match)
943 char buf[sizeof("dst,dst,dst\0")];
947 struct fw3_ipset *set;
948 struct fw3_ipset_datatype *type;
950 if (!match || !match->set || !match->ptr)
954 list_for_each_entry(type, &set->datatypes, list)
962 p += sprintf(p, "%s", match->dir[i] ? match->dir[i] : type->dir);
966 fw3_ipt_rule_addarg(r, false, "-m", "set");
968 fw3_ipt_rule_addarg(r, match->invert, "--match-set",
969 set->external ? set->external : set->name);
971 fw3_ipt_rule_addarg(r, false, buf, NULL);
975 fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
978 struct tm empty = { 0 };
980 char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
983 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
984 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
986 if (!d1 && !d2 && !time->timestart && !time->timestop &&
987 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
992 fw3_ipt_rule_addarg(r, false, "-m", "time");
995 fw3_ipt_rule_addarg(r, false, "--utc", NULL);
999 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
1000 fw3_ipt_rule_addarg(r, false, "--datestart", buf);
1005 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
1006 fw3_ipt_rule_addarg(r, false, "--datestop", buf);
1009 if (time->timestart)
1011 sprintf(buf, "%02d:%02d:%02d",
1012 time->timestart / 3600,
1013 time->timestart % 3600 / 60,
1014 time->timestart % 60);
1016 fw3_ipt_rule_addarg(r, false, "--timestart", buf);
1021 sprintf(buf, "%02d:%02d:%02d",
1022 time->timestop / 3600,
1023 time->timestop % 3600 / 60,
1024 time->timestop % 60);
1026 fw3_ipt_rule_addarg(r, false, "--timestop", buf);
1029 if (time->monthdays & 0xFFFFFFFE)
1031 for (i = 1, p = buf; i < 32; i++)
1033 if (hasbit(time->monthdays, i))
1038 p += sprintf(p, "%u", i);
1042 fw3_ipt_rule_addarg(r, hasbit(time->monthdays, 0), "--monthdays", buf);
1045 if (time->weekdays & 0xFE)
1047 for (i = 1, p = buf; i < 8; i++)
1049 if (hasbit(time->weekdays, i))
1054 p += sprintf(p, "%u", i);
1058 fw3_ipt_rule_addarg(r, hasbit(time->weekdays, 0), "--weekdays", buf);
1063 fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
1065 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1067 if (!mark || !mark->set)
1070 if (mark->mask < 0xFFFFFFFF)
1071 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
1073 sprintf(buf, "0x%x", mark->mark);
1075 fw3_ipt_rule_addarg(r, false, "-m", "mark");
1076 fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
1080 fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
1089 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1092 fw3_ipt_rule_addarg(r, false, "-m", "comment");
1093 fw3_ipt_rule_addarg(r, false, "--comment", buf);
1097 fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
1101 if (!extra || !*extra)
1104 s = fw3_strdup(extra);
1106 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
1108 tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
1114 r->argv[r->argc++] = fw3_strdup(p);
1120 #ifndef DISABLE_IPV6
1122 rule_print6(struct ip6t_entry *e)
1124 char buf1[INET6_ADDRSTRLEN], buf2[INET6_ADDRSTRLEN];
1127 if (e->ipv6.flags & IP6T_F_PROTO)
1129 if (e->ipv6.invflags & XT_INV_PROTO)
1132 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
1135 printf(" -p %s", pname);
1137 printf(" -p %u", e->ipv6.proto);
1140 if (e->ipv6.iniface[0])
1142 if (e->ipv6.invflags & IP6T_INV_VIA_IN)
1145 printf(" -i %s", e->ipv6.iniface);
1148 if (e->ipv6.outiface[0])
1150 if (e->ipv6.invflags & IP6T_INV_VIA_OUT)
1153 printf(" -o %s", e->ipv6.outiface);
1156 if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
1158 if (e->ipv6.invflags & IP6T_INV_SRCIP)
1162 inet_ntop(AF_INET6, &e->ipv6.src, buf1, sizeof(buf1)),
1163 inet_ntop(AF_INET6, &e->ipv6.smsk, buf2, sizeof(buf2)));
1166 if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
1168 if (e->ipv6.invflags & IP6T_INV_DSTIP)
1172 inet_ntop(AF_INET6, &e->ipv6.dst, buf1, sizeof(buf1)),
1173 inet_ntop(AF_INET6, &e->ipv6.dmsk, buf2, sizeof(buf2)));
1179 rule_print4(struct ipt_entry *e)
1181 struct in_addr in_zero = { 0 };
1182 char buf1[sizeof("255.255.255.255\0")], buf2[sizeof("255.255.255.255\0")];
1187 if (e->ip.invflags & XT_INV_PROTO)
1190 pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
1193 printf(" -p %s", pname);
1195 printf(" -p %u", e->ip.proto);
1198 if (e->ip.iniface[0])
1200 if (e->ip.invflags & IPT_INV_VIA_IN)
1203 printf(" -i %s", e->ip.iniface);
1206 if (e->ip.outiface[0])
1208 if (e->ip.invflags & IPT_INV_VIA_OUT)
1211 printf(" -o %s", e->ip.outiface);
1214 if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
1216 if (e->ip.invflags & IPT_INV_SRCIP)
1220 inet_ntop(AF_INET, &e->ip.src, buf1, sizeof(buf1)),
1221 inet_ntop(AF_INET, &e->ip.smsk, buf2, sizeof(buf2)));
1224 if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
1226 if (e->ip.invflags & IPT_INV_DSTIP)
1230 inet_ntop(AF_INET, &e->ip.dst, buf1, sizeof(buf1)),
1231 inet_ntop(AF_INET, &e->ip.dmsk, buf2, sizeof(buf2)));
1236 rule_print(struct fw3_ipt_rule *r, const char *prefix, const char *chain)
1238 debug(r->h, "%s %s", prefix, chain);
1240 #ifndef DISABLE_IPV6
1241 if (r->h->family == FW3_FAMILY_V6)
1242 rule_print6(&r->e6);
1247 fw3_xt_print_matches(&r->e.ip, r->matches);
1248 fw3_xt_print_target(&r->e.ip, r->target);
1254 parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
1256 struct xtables_rule_match *m;
1257 struct xtables_match *em;
1259 /* is a target option */
1260 if (r->target && fw3_xt_has_target_parse(r->target) &&
1261 optc >= r->target->option_offset &&
1262 optc < (r->target->option_offset + 256))
1264 xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
1268 /* try to dispatch argument to one of the match parsers */
1269 for (m = r->matches; m; m = m->next)
1273 if (m->completed || !fw3_xt_has_match_parse(em))
1276 if (optc < em->option_offset ||
1277 optc >= (em->option_offset + 256))
1280 xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
1284 /* unhandled option, might belong to a protocol match */
1285 if ((em = load_protomatch(r)) != NULL)
1287 init_match(r, em, false);
1289 r->protocol_loaded = true;
1296 warn("parse_option(): option '%s' needs argument", r->argv[optind-1]);
1299 warn("parse_option(): unknown option '%s'", r->argv[optind-1]);
1305 fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
1306 const char *k, const char *v)
1314 n = inv + !!k + !!v;
1315 tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
1323 r->argv[r->argc++] = fw3_strdup("!");
1325 r->argv[r->argc++] = fw3_strdup(k);
1328 r->argv[r->argc++] = fw3_strdup(v);
1331 static unsigned char *
1332 rule_mask(struct fw3_ipt_rule *r)
1335 unsigned char *p, *mask = NULL;
1336 struct xtables_rule_match *m;
1338 #define SZ(x) XT_ALIGN(sizeof(struct x))
1340 #ifndef DISABLE_IPV6
1341 if (r->h->family == FW3_FAMILY_V6)
1345 for (m = r->matches; m; m = m->next)
1346 s += SZ(ip6t_entry_match) + m->match->size;
1348 s += SZ(ip6t_entry_target);
1350 s += r->target->size;
1352 mask = fw3_alloc(s);
1353 memset(mask, 0xFF, SZ(ip6t_entry));
1354 p = mask + SZ(ip6t_entry);
1356 for (m = r->matches; m; m = m->next)
1358 memset(p, 0xFF, SZ(ip6t_entry_match) + m->match->userspacesize);
1359 p += SZ(ip6t_entry_match) + m->match->size;
1362 memset(p, 0xFF, SZ(ip6t_entry_target) + (r->target) ? r->target->userspacesize : 0);
1369 for (m = r->matches; m; m = m->next)
1370 s += SZ(ipt_entry_match) + m->match->size;
1372 s += SZ(ipt_entry_target);
1374 s += r->target->size;
1376 mask = fw3_alloc(s);
1377 memset(mask, 0xFF, SZ(ipt_entry));
1378 p = mask + SZ(ipt_entry);
1380 for (m = r->matches; m; m = m->next)
1382 memset(p, 0xFF, SZ(ipt_entry_match) + m->match->userspacesize);
1383 p += SZ(ipt_entry_match) + m->match->size;
1386 memset(p, 0xFF, SZ(ipt_entry_target) + (r->target) ? r->target->userspacesize : 0);
1393 rule_build(struct fw3_ipt_rule *r)
1395 size_t s, target_size = (r->target) ? r->target->t->u.target_size : 0;
1396 struct xtables_rule_match *m;
1398 #ifndef DISABLE_IPV6
1399 if (r->h->family == FW3_FAMILY_V6)
1401 struct ip6t_entry *e6;
1403 s = XT_ALIGN(sizeof(struct ip6t_entry));
1405 for (m = r->matches; m; m = m->next)
1406 s += m->match->m->u.match_size;
1408 e6 = fw3_alloc(s + target_size);
1410 memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
1412 e6->target_offset = s;
1413 e6->next_offset = s + target_size;
1417 for (m = r->matches; m; m = m->next)
1419 memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
1420 s += m->match->m->u.match_size;
1424 memcpy(e6->elems + s, r->target->t, target_size);
1431 struct ipt_entry *e;
1433 s = XT_ALIGN(sizeof(struct ipt_entry));
1435 for (m = r->matches; m; m = m->next)
1436 s += m->match->m->u.match_size;
1438 e = fw3_alloc(s + target_size);
1440 memcpy(e, &r->e, sizeof(struct ipt_entry));
1442 e->target_offset = s;
1443 e->next_offset = s + target_size;
1447 for (m = r->matches; m; m = m->next)
1449 memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
1450 s += m->match->m->u.match_size;
1454 memcpy(e->elems + s, r->target->t, target_size);
1461 __fw3_ipt_rule_append(struct fw3_ipt_rule *r, bool repl, const char *fmt, ...)
1464 unsigned char *mask;
1466 struct xtables_rule_match *m;
1467 struct xtables_match *em;
1468 struct xtables_target *et;
1469 struct xtables_globals *g;
1478 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1481 g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
1482 g->opts = g->orig_opts;
1489 em = find_match(r, "id");
1493 warn("fw3_ipt_rule_append(): Can't find match '%s'", "id");
1497 init_match(r, em, true);
1499 id = FW3_ID_MAGIC | (r->id & ~FW3_ID_MASK);
1500 memcpy(em->m->data, &id, sizeof(id));
1505 while ((optc = getopt_long(r->argc, r->argv, "-:m:j:", g->opts,
1511 em = find_match(r, optarg);
1515 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg);
1519 init_match(r, em, true);
1523 et = get_target(r, optarg);
1527 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg);
1534 if ((optarg[0] == '!') && (optarg[1] == '\0'))
1541 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg);
1545 if (parse_option(r, optc, inv))
1553 for (m = r->matches; m; m = m->next)
1554 xtables_option_mfcall(m->match);
1557 xtables_option_tfcall(r->target);
1559 rule = rule_build(r);
1561 #ifndef DISABLE_IPV6
1562 if (r->h->family == FW3_FAMILY_V6)
1566 mask = rule_mask(r);
1568 while (ip6tc_delete_entry(buf, rule, mask, r->h->handle))
1570 rule_print(r, "-D", buf);
1576 rule_print(r, "-A", buf);
1578 if (!ip6tc_append_entry(buf, rule, r->h->handle))
1579 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno));
1586 mask = rule_mask(r);
1588 while (iptc_delete_entry(buf, rule, mask, r->h->handle))
1590 rule_print(r, "-D", buf);
1596 rule_print(r, "-A", buf);
1598 if (!iptc_append_entry(buf, rule, r->h->handle))
1599 warn("iptc_append_entry(): %s\n", iptc_strerror(errno));
1605 for (i = 1; i < r->argc; i++)
1610 xtables_rule_matches_free(&r->matches);
1617 /* reset all targets and matches */
1618 for (em = xtables_matches; em; em = em->next)
1621 for (et = xtables_targets; et; et = et->next)
1627 xtables_free_opts(1);
1630 struct fw3_ipt_rule *
1631 fw3_ipt_rule_create(struct fw3_ipt_handle *handle, struct fw3_protocol *proto,
1632 struct fw3_device *in, struct fw3_device *out,
1633 struct fw3_address *src, struct fw3_address *dest)
1635 struct fw3_ipt_rule *r;
1637 r = fw3_ipt_rule_new(handle);
1639 fw3_ipt_rule_proto(r, proto);
1640 fw3_ipt_rule_in_out(r, in, out);
1641 fw3_ipt_rule_src_dest(r, src, dest);