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.
23 parse_enum(void *ptr, const char *val, const char **values, int min, int max)
25 int i, l = strlen(val);
29 for (i = 0; i <= (max - min); i++)
31 if (!strncasecmp(val, values[i], l))
33 *((int *)ptr) = min + i;
43 const char *fw3_flag_names[FW3_DEFAULT_DROP_INVALID + 1] = {
60 static const char *limit_units[] = {
67 static const char *ipset_methods[] = {
73 static const char *ipset_types[] = {
81 static const char *weekdays[] = {
91 static const char *include_types[] = {
98 fw3_parse_bool(void *ptr, const char *val)
100 if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
101 *((bool *)ptr) = true;
103 *((bool *)ptr) = false;
109 fw3_parse_int(void *ptr, const char *val)
111 int n = strtol(val, NULL, 10);
113 if (errno == ERANGE || errno == EINVAL)
122 fw3_parse_string(void *ptr, const char *val)
124 *((char **)ptr) = (char *)val;
129 fw3_parse_target(void *ptr, const char *val)
131 return parse_enum(ptr, val, &fw3_flag_names[FW3_TARGET_ACCEPT],
132 FW3_TARGET_ACCEPT, FW3_TARGET_SNAT);
136 fw3_parse_limit(void *ptr, const char *val)
138 struct fw3_limit *limit = ptr;
139 enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
145 limit->invert = true;
146 while (isspace(*++val));
149 n = strtol(val, &e, 10);
151 if (errno == ERANGE || errno == EINVAL)
154 if (*e && *e++ != '/')
160 if (!parse_enum(&u, e, limit_units, 0, FW3_LIMIT_UNIT_DAY))
170 fw3_parse_device(void *ptr, const char *val)
172 struct fw3_device *dev = ptr;
184 while (isspace(*++val));
188 snprintf(dev->name, sizeof(dev->name), "%s", val);
197 fw3_parse_address(void *ptr, const char *val)
199 struct fw3_address *addr = ptr;
208 while (isspace(*++val));
216 if ((p = strchr(s, '/')) != NULL)
219 m = strtoul(p, &e, 10);
221 if ((e == p) || (*e != 0))
223 if (strchr(s, ':') || !inet_pton(AF_INET, p, &v4))
229 for (i = 0, m = 32; !(v4.s_addr & 1) && (i < 32); i++)
236 else if ((p = strchr(s, '-')) != NULL)
240 if (inet_pton(AF_INET6, p, &v6))
242 addr->family = FW3_FAMILY_V6;
243 addr->address2.v6 = v6;
246 else if (inet_pton(AF_INET, p, &v4))
248 addr->family = FW3_FAMILY_V4;
249 addr->address2.v4 = v4;
259 if (inet_pton(AF_INET6, s, &v6))
261 addr->family = FW3_FAMILY_V6;
262 addr->address.v6 = v6;
263 addr->mask = (m >= 0) ? m : 128;
265 else if (inet_pton(AF_INET, s, &v4))
267 addr->family = FW3_FAMILY_V4;
268 addr->address.v4 = v4;
269 addr->mask = (m >= 0) ? m : 32;
283 fw3_parse_mac(void *ptr, const char *val)
285 struct fw3_mac *addr = ptr;
286 struct ether_addr *mac;
291 while (isspace(*++val));
294 if ((mac = ether_aton(val)) != NULL)
305 fw3_parse_port(void *ptr, const char *val)
307 struct fw3_port *range = ptr;
314 range->invert = true;
315 while (isspace(*++val));
318 n = strtoul(val, &p, 10);
320 if (errno == ERANGE || errno == EINVAL)
323 if (*p && *p != '-' && *p != ':')
328 m = strtoul(++p, NULL, 10);
330 if (errno == ERANGE || errno == EINVAL || m < n)
347 fw3_parse_family(void *ptr, const char *val)
349 if (!strcmp(val, "any"))
350 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
351 else if (!strcmp(val, "inet") || strrchr(val, '4'))
352 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
353 else if (!strcmp(val, "inet6") || strrchr(val, '6'))
354 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
362 fw3_parse_icmptype(void *ptr, const char *val)
364 struct fw3_icmptype *icmp = ptr;
370 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
372 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
374 icmp->type = fw3_icmptype_list_v4[i].type;
375 icmp->code_min = fw3_icmptype_list_v4[i].code_min;
376 icmp->code_max = fw3_icmptype_list_v4[i].code_max;
383 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
385 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
387 icmp->type6 = fw3_icmptype_list_v6[i].type;
388 icmp->code6_min = fw3_icmptype_list_v6[i].code_min;
389 icmp->code6_max = fw3_icmptype_list_v6[i].code_max;
398 i = strtoul(val, &p, 10);
400 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
408 i = strtoul(val, &p, 10);
410 if ((p == val) || (*p != 0) || (i > 0xFF))
419 icmp->code_max = 0xFF;
422 icmp->type6 = icmp->type;
423 icmp->code6_min = icmp->code_max;
424 icmp->code6_max = icmp->code_max;
430 icmp->family = (v4 && v6) ? FW3_FAMILY_ANY
431 : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
437 fw3_parse_protocol(void *ptr, const char *val)
439 struct fw3_protocol *proto = ptr;
440 struct protoent *ent;
444 proto->invert = true;
445 while (isspace(*++val));
448 if (!strcmp(val, "all"))
453 else if (!strcmp(val, "icmpv6"))
458 ent = getprotobyname(val);
462 proto->protocol = ent->p_proto;
466 proto->protocol = strtoul(val, NULL, 10);
467 return (errno != ERANGE && errno != EINVAL);
471 fw3_parse_ipset_method(void *ptr, const char *val)
473 return parse_enum(ptr, val, ipset_methods,
474 FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
478 fw3_parse_ipset_datatype(void *ptr, const char *val)
480 struct fw3_ipset_datatype *type = ptr;
482 if (!strncmp(val, "dest_", 5))
487 else if (!strncmp(val, "dst_", 4))
492 else if (!strncmp(val, "src_", 4))
498 return parse_enum(&type->type, val, ipset_types,
499 FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET);
503 fw3_parse_date(void *ptr, const char *val)
505 unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
506 struct tm tm = { 0 };
509 year = strtoul(val, &p, 10);
510 if ((*p != '-' && *p) || year < 1970 || year > 2038)
515 mon = strtoul(++p, &p, 10);
516 if ((*p != '-' && *p) || mon > 12)
521 day = strtoul(++p, &p, 10);
522 if ((*p != 'T' && *p) || day > 31)
527 hour = strtoul(++p, &p, 10);
528 if ((*p != ':' && *p) || hour > 23)
533 min = strtoul(++p, &p, 10);
534 if ((*p != ':' && *p) || min > 59)
539 sec = strtoul(++p, &p, 10);
544 tm.tm_year = year - 1900;
551 if (mktime(&tm) >= 0)
553 *((struct tm *)ptr) = tm;
562 fw3_parse_time(void *ptr, const char *val)
564 unsigned int hour = 0, min = 0, sec = 0;
567 hour = strtoul(val, &p, 10);
568 if (*p != ':' || hour > 23)
571 min = strtoul(++p, &p, 10);
572 if ((*p != ':' && *p) || min > 59)
577 sec = strtoul(++p, &p, 10);
582 *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
590 fw3_parse_weekdays(void *ptr, const char *val)
597 setbit(*(uint8_t *)ptr, 0);
598 while (isspace(*++val));
601 if (!(s = strdup(val)))
604 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
606 if (!parse_enum(&w, p, weekdays, 1, 7))
608 w = strtoul(p, &p, 10);
610 if (*p || w < 1 || w > 7)
617 setbit(*(uint8_t *)ptr, w);
625 fw3_parse_monthdays(void *ptr, const char *val)
632 setbit(*(uint32_t *)ptr, 0);
633 while (isspace(*++val));
636 if (!(s = strdup(val)))
639 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
641 d = strtoul(p, &p, 10);
643 if (*p || d < 1 || d > 31)
649 setbit(*(uint32_t *)ptr, d);
657 fw3_parse_include_type(void *ptr, const char *val)
659 return parse_enum(ptr, val, include_types,
660 FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
665 fw3_parse_options(void *s, const struct fw3_option *opts,
666 struct uci_section *section)
670 struct uci_element *e, *l;
671 struct uci_option *o;
672 const struct fw3_option *opt;
673 struct list_head *item;
674 struct list_head *dest;
676 uci_foreach_element(§ion->options, e)
678 o = uci_to_option(e);
681 for (opt = opts; opt->name; opt++)
686 if (strcmp(opt->name, e->name))
689 if (o->type == UCI_TYPE_LIST)
693 warn_elem(e, "must not be a list");
697 uci_foreach_element(&o->v.list, l)
702 item = malloc(opt->elem_size);
707 memset(item, 0, opt->elem_size);
709 if (!opt->parse(item, l->name))
711 warn_elem(e, "has invalid value '%s'", l->name);
716 dest = (struct list_head *)((char *)s + opt->offset);
717 list_add_tail(item, dest);
728 /* protocol "tcpudp" compatibility hack */
729 if (opt->parse == fw3_parse_protocol && !strcmp(v, "tcpudp"))
730 v = strdup("tcp udp");
734 if (!opt->parse((char *)s + opt->offset, o->v.string))
735 warn_elem(e, "has invalid value '%s'", o->v.string);
739 for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
741 item = malloc(opt->elem_size);
746 memset(item, 0, opt->elem_size);
748 if (!opt->parse(item, p))
750 warn_elem(e, "has invalid value '%s'", p);
755 dest = (struct list_head *)((char *)s + opt->offset);
756 list_add_tail(item, dest);
760 if (v != o->v.string)
769 warn_elem(e, "is unknown");
775 fw3_format_in_out(struct fw3_device *in, struct fw3_device *out)
778 fw3_pr(" %s-i %s", in->invert ? "! " : "", in->name);
780 if (out && !out->any)
781 fw3_pr(" %s-o %s", out->invert ? "! " : "", out->name);
785 fw3_format_src_dest(struct fw3_address *src, struct fw3_address *dest)
787 char s[INET6_ADDRSTRLEN];
789 if ((src && src->range) || (dest && dest->range))
790 fw3_pr(" -m iprange");
796 inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
797 &src->address.v4, s, sizeof(s));
799 fw3_pr(" %s--src-range %s", src->invert ? "! " : "", s);
801 inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
802 &src->address2.v4, s, sizeof(s));
808 inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
809 &src->address.v4, s, sizeof(s));
811 fw3_pr(" %s-s %s/%u", src->invert ? "! " : "", s, src->mask);
815 if (dest && dest->set)
819 inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
820 &dest->address.v4, s, sizeof(s));
822 fw3_pr(" %s--dst-range %s", dest->invert ? "! " : "", s);
824 inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
825 &dest->address2.v4, s, sizeof(s));
831 inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
832 &dest->address.v4, s, sizeof(s));
834 fw3_pr(" %s-d %s/%u", dest->invert ? "! " : "", s, dest->mask);
840 fw3_format_sport_dport(struct fw3_port *sp, struct fw3_port *dp)
844 if (sp->port_min == sp->port_max)
845 fw3_pr(" %s--sport %u", sp->invert ? "! " : "", sp->port_min);
847 fw3_pr(" %s--sport %u:%u",
848 sp->invert ? "! " : "", sp->port_min, sp->port_max);
853 if (dp->port_min == dp->port_max)
854 fw3_pr(" %s--dport %u", dp->invert ? "! " : "", dp->port_min);
856 fw3_pr(" %s--dport %u:%u",
857 dp->invert ? "! " : "", dp->port_min, dp->port_max);
862 fw3_format_mac(struct fw3_mac *mac)
867 fw3_pr(" -m mac %s--mac-source %s",
868 mac->invert ? "! " : "", ether_ntoa(&mac->mac));
872 fw3_format_protocol(struct fw3_protocol *proto, enum fw3_family family)
879 pr = proto->protocol;
881 if (pr == 1 && family == FW3_FAMILY_V6)
887 fw3_pr(" %s-p %u", proto->invert ? "! " : "", pr);
891 fw3_format_icmptype(struct fw3_icmptype *icmp, enum fw3_family family)
896 if (family != FW3_FAMILY_V6)
898 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
899 fw3_pr(" %s--icmp-type %u", icmp->invert ? "! " : "", icmp->type);
901 fw3_pr(" %s--icmp-type %u/%u",
902 icmp->invert ? "! " : "", icmp->type, icmp->code_min);
906 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
907 fw3_pr(" %s--icmpv6-type %u", icmp->invert ? "! " : "", icmp->type6);
909 fw3_pr(" %s--icmpv6-type %u/%u",
910 icmp->invert ? "! " : "", icmp->type6, icmp->code6_min);
915 fw3_format_limit(struct fw3_limit *limit)
922 fw3_pr(" -m limit %s--limit %u/%s",
923 limit->invert ? "! " : "",
924 limit->rate, limit_units[limit->unit]);
926 if (limit->burst > 0)
927 fw3_pr(" --limit-burst %u", limit->burst);
932 fw3_format_ipset(struct fw3_ipset *ipset, bool invert)
935 const char *name = NULL;
936 struct fw3_ipset_datatype *type;
941 if (ipset->external && *ipset->external)
942 name = ipset->external;
946 fw3_pr(" -m set %s--match-set %s", invert ? "! " : "", name);
948 list_for_each_entry(type, &ipset->datatypes, list)
950 fw3_pr("%c%s", first ? ' ' : ',', type->dest ? "dst" : "src");
956 fw3_format_time(struct fw3_time *time)
959 struct tm empty = { 0 };
960 char buf[sizeof("9999-99-99T23:59:59\0")];
961 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
962 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
965 if (!d1 && !d2 && !time->timestart && !time->timestop &&
966 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
978 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
979 fw3_pr(" --datestart %s", buf);
984 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
985 fw3_pr(" --datestop %s", buf);
990 fw3_pr(" --timestart %02d:%02d:%02d",
991 time->timestart / 3600,
992 time->timestart % 3600 / 60,
993 time->timestart % 60);
998 fw3_pr(" --timestop %02d:%02d:%02d",
999 time->timestop / 3600,
1000 time->timestop % 3600 / 60,
1001 time->timestop % 60);
1004 if (time->monthdays & 0xFFFFFFFE)
1006 fw3_pr(" %s--monthdays", hasbit(time->monthdays, 0) ? "! " : "");
1008 for (i = 1, first = true; i < 32; i++)
1010 if (hasbit(time->monthdays, i))
1012 fw3_pr("%c%u", first ? ' ' : ',', i);
1018 if (time->weekdays & 0xFE)
1020 fw3_pr(" %s--weekdays", hasbit(time->weekdays, 0) ? "! " : "");
1022 for (i = 1, first = true; i < 8; i++)
1024 if (hasbit(time->weekdays, i))
1026 fw3_pr("%c%u", first ? ' ' : ',', i);
1034 __fw3_format_comment(const char *comment, ...)
1040 if (!comment || !*comment)
1043 fw3_pr(" -m comment --comment \"");
1047 va_start(ap, comment);
1073 c = va_arg(ap, const char *);
1083 fw3_format_extra(const char *extra)
1085 if (!extra || !*extra)
1088 fw3_pr(" %s", extra);