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.
24 put_value(void *ptr, void *val, int elem_size, bool is_list)
30 copy = malloc(elem_size);
35 memcpy(copy, val, elem_size);
36 list_add_tail((struct list_head *)copy, (struct list_head *)ptr);
40 memcpy(ptr, val, elem_size);
45 parse_enum(void *ptr, const char *val, const char **values, int min, int max)
47 int i, l = strlen(val);
51 for (i = 0; i <= (max - min); i++)
53 if (!strncasecmp(val, values[i], l))
55 *((int *)ptr) = min + i;
65 const char *fw3_flag_names[__FW3_FLAG_MAX] = {
87 static const char *limit_units[] = {
94 const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX] = {
101 const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX] = {
110 static const char *weekdays[] = {
120 static const char *include_types[] = {
125 static const char *reflection_sources[] = {
132 fw3_parse_bool(void *ptr, const char *val, bool is_list)
134 if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
135 *((bool *)ptr) = true;
137 *((bool *)ptr) = false;
143 fw3_parse_int(void *ptr, const char *val, bool is_list)
145 int n = strtol(val, NULL, 0);
147 if (errno == ERANGE || errno == EINVAL)
156 fw3_parse_string(void *ptr, const char *val, bool is_list)
158 *((char **)ptr) = (char *)val;
163 fw3_parse_target(void *ptr, const char *val, bool is_list)
165 return parse_enum(ptr, val, &fw3_flag_names[FW3_FLAG_ACCEPT],
166 FW3_FLAG_ACCEPT, FW3_FLAG_SNAT);
170 fw3_parse_limit(void *ptr, const char *val, bool is_list)
172 struct fw3_limit *limit = ptr;
173 enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
179 limit->invert = true;
180 while (isspace(*++val));
183 n = strtol(val, &e, 10);
185 if (errno == ERANGE || errno == EINVAL)
188 if (*e && *e++ != '/')
194 if (!parse_enum(&u, e, limit_units, 0, FW3_LIMIT_UNIT_DAY))
204 fw3_parse_device(void *ptr, const char *val, bool is_list)
207 struct fw3_device dev = { };
213 put_value(ptr, &dev, sizeof(dev), is_list);
220 while (isspace(*++val));
223 if ((p = strchr(val, '@')) != NULL)
226 snprintf(dev.network, sizeof(dev.network), "%s", p);
230 snprintf(dev.name, sizeof(dev.name), "%s", val);
235 put_value(ptr, &dev, sizeof(dev), is_list);
240 fw3_parse_address(void *ptr, const char *val, bool is_list)
242 struct fw3_address addr = { };
251 while (isspace(*++val));
259 if ((p = strchr(s, '/')) != NULL)
262 m = strtoul(p, &e, 10);
264 if ((e == p) || (*e != 0))
266 if (strchr(s, ':') || !inet_pton(AF_INET, p, &v4))
272 for (i = 0, m = 32; !(v4.s_addr & 1) && (i < 32); i++)
279 else if ((p = strchr(s, '-')) != NULL)
283 if (inet_pton(AF_INET6, p, &v6))
285 addr.family = FW3_FAMILY_V6;
286 addr.address2.v6 = v6;
289 else if (inet_pton(AF_INET, p, &v4))
291 addr.family = FW3_FAMILY_V4;
292 addr.address2.v4 = v4;
302 if (inet_pton(AF_INET6, s, &v6))
304 addr.family = FW3_FAMILY_V6;
305 addr.address.v6 = v6;
306 addr.mask = (m >= 0) ? m : 128;
308 else if (inet_pton(AF_INET, s, &v4))
310 addr.family = FW3_FAMILY_V4;
311 addr.address.v4 = v4;
312 addr.mask = (m >= 0) ? m : 32;
322 put_value(ptr, &addr, sizeof(addr), is_list);
327 fw3_parse_network(void *ptr, const char *val, bool is_list)
329 struct fw3_device dev = { };
330 struct fw3_address *addr;
331 struct list_head *addr_list;
333 if (!fw3_parse_address(ptr, val, is_list))
335 if (!fw3_parse_device(&dev, val, false))
338 addr_list = fw3_ubus_address(dev.name);
342 list_for_each_entry(addr, addr_list, list)
344 addr->invert = dev.invert;
346 if (!put_value(ptr, addr, sizeof(*addr), is_list))
350 fw3_ubus_address_free(addr_list);
358 fw3_parse_mac(void *ptr, const char *val, bool is_list)
360 struct fw3_mac addr = { };
361 struct ether_addr *mac;
366 while (isspace(*++val));
369 if ((mac = ether_aton(val)) != NULL)
374 put_value(ptr, &addr, sizeof(addr), is_list);
382 fw3_parse_port(void *ptr, const char *val, bool is_list)
384 struct fw3_port range = { };
392 while (isspace(*++val));
395 n = strtoul(val, &p, 10);
397 if (errno == ERANGE || errno == EINVAL)
400 if (*p && *p != '-' && *p != ':')
405 m = strtoul(++p, NULL, 10);
407 if (errno == ERANGE || errno == EINVAL || m < n)
420 put_value(ptr, &range, sizeof(range), is_list);
425 fw3_parse_family(void *ptr, const char *val, bool is_list)
427 if (!strcmp(val, "any"))
428 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
429 else if (!strcmp(val, "inet") || strrchr(val, '4'))
430 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
431 else if (!strcmp(val, "inet6") || strrchr(val, '6'))
432 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
440 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
442 struct fw3_icmptype icmp = { };
448 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
450 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
452 icmp.type = fw3_icmptype_list_v4[i].type;
453 icmp.code_min = fw3_icmptype_list_v4[i].code_min;
454 icmp.code_max = fw3_icmptype_list_v4[i].code_max;
461 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
463 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
465 icmp.type6 = fw3_icmptype_list_v6[i].type;
466 icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
467 icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
476 i = strtoul(val, &p, 10);
478 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
486 i = strtoul(val, &p, 10);
488 if ((p == val) || (*p != 0) || (i > 0xFF))
497 icmp.code_max = 0xFF;
500 icmp.type6 = icmp.type;
501 icmp.code6_min = icmp.code_max;
502 icmp.code6_max = icmp.code_max;
508 icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
509 : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
511 put_value(ptr, &icmp, sizeof(icmp), is_list);
516 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
518 struct fw3_protocol proto = { };
519 struct protoent *ent;
524 while (isspace(*++val));
527 if (!strcmp(val, "all"))
530 put_value(ptr, &proto, sizeof(proto), is_list);
533 else if (!strcmp(val, "icmpv6"))
537 else if (!strcmp(val, "tcpudp"))
540 if (put_value(ptr, &proto, sizeof(proto), is_list))
543 put_value(ptr, &proto, sizeof(proto), is_list);
549 ent = getprotobyname(val);
553 proto.protocol = ent->p_proto;
554 put_value(ptr, &proto, sizeof(proto), is_list);
558 proto.protocol = strtoul(val, NULL, 10);
560 if (errno == ERANGE || errno == EINVAL)
563 put_value(ptr, &proto, sizeof(proto), is_list);
568 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
570 return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
571 FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
575 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
577 struct fw3_ipset_datatype type = { };
579 if (!strncmp(val, "dest_", 5))
584 else if (!strncmp(val, "dst_", 4))
589 else if (!strncmp(val, "src_", 4))
595 if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
596 FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
598 put_value(ptr, &type, sizeof(type), is_list);
606 fw3_parse_date(void *ptr, const char *val, bool is_list)
608 unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
609 struct tm tm = { 0 };
612 year = strtoul(val, &p, 10);
613 if ((*p != '-' && *p) || year < 1970 || year > 2038)
618 mon = strtoul(++p, &p, 10);
619 if ((*p != '-' && *p) || mon > 12)
624 day = strtoul(++p, &p, 10);
625 if ((*p != 'T' && *p) || day > 31)
630 hour = strtoul(++p, &p, 10);
631 if ((*p != ':' && *p) || hour > 23)
636 min = strtoul(++p, &p, 10);
637 if ((*p != ':' && *p) || min > 59)
642 sec = strtoul(++p, &p, 10);
647 tm.tm_year = year - 1900;
654 if (mktime(&tm) >= 0)
656 *((struct tm *)ptr) = tm;
665 fw3_parse_time(void *ptr, const char *val, bool is_list)
667 unsigned int hour = 0, min = 0, sec = 0;
670 hour = strtoul(val, &p, 10);
671 if (*p != ':' || hour > 23)
674 min = strtoul(++p, &p, 10);
675 if ((*p != ':' && *p) || min > 59)
680 sec = strtoul(++p, &p, 10);
685 *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
693 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
700 setbit(*(uint8_t *)ptr, 0);
701 while (isspace(*++val));
704 if (!(s = strdup(val)))
707 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
709 if (!parse_enum(&w, p, weekdays, 1, 7))
711 w = strtoul(p, &p, 10);
713 if (*p || w < 1 || w > 7)
720 setbit(*(uint8_t *)ptr, w);
728 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
735 setbit(*(uint32_t *)ptr, 0);
736 while (isspace(*++val));
739 if (!(s = strdup(val)))
742 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
744 d = strtoul(p, &p, 10);
746 if (*p || d < 1 || d > 31)
752 setbit(*(uint32_t *)ptr, d);
760 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
762 return parse_enum(ptr, val, include_types,
763 FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
767 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
769 return parse_enum(ptr, val, reflection_sources,
770 FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
774 fw3_parse_mark(void *ptr, const char *val, bool is_list)
778 struct fw3_mark *m = ptr;
783 while (isspace(*++val));
786 if ((s = strchr(val, '/')) != NULL)
789 n = strtoul(val, &e, 0);
795 m->mask = 0xFFFFFFFF;
799 n = strtoul(s, &e, 0);
813 fw3_parse_options(void *s, const struct fw3_option *opts,
814 struct uci_section *section)
818 struct uci_element *e, *l;
819 struct uci_option *o;
820 const struct fw3_option *opt;
821 struct list_head *dest;
823 uci_foreach_element(§ion->options, e)
825 o = uci_to_option(e);
828 for (opt = opts; opt->name; opt++)
833 if (strcmp(opt->name, e->name))
836 if (o->type == UCI_TYPE_LIST)
840 warn_elem(e, "must not be a list");
844 dest = (struct list_head *)((char *)s + opt->offset);
846 uci_foreach_element(&o->v.list, l)
851 if (!opt->parse(dest, l->name, true))
853 warn_elem(e, "has invalid value '%s'", l->name);
868 if (!opt->parse((char *)s + opt->offset, o->v.string, false))
869 warn_elem(e, "has invalid value '%s'", o->v.string);
873 dest = (struct list_head *)((char *)s + opt->offset);
875 for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
877 if (!opt->parse(dest, p, true))
879 warn_elem(e, "has invalid value '%s'", p);
891 warn_elem(e, "is unknown");
897 fw3_format_in_out(struct fw3_device *in, struct fw3_device *out)
900 fw3_pr(" %s-i %s", in->invert ? "! " : "", in->name);
902 if (out && !out->any)
903 fw3_pr(" %s-o %s", out->invert ? "! " : "", out->name);
907 fw3_address_to_string(struct fw3_address *address, bool allow_invert)
909 char *p, ip[INET6_ADDRSTRLEN];
910 static char buf[INET6_ADDRSTRLEN * 2 + 2];
914 if (address->invert && allow_invert)
915 p += sprintf(p, "!");
917 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
918 &address->address.v4, ip, sizeof(ip));
920 p += sprintf(p, "%s", ip);
924 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
925 &address->address2.v4, ip, sizeof(ip));
927 p += sprintf(p, "-%s", ip);
931 p += sprintf(p, "/%u", address->mask);
938 fw3_format_src_dest(struct fw3_address *src, struct fw3_address *dest)
940 if ((src && src->range) || (dest && dest->range))
941 fw3_pr(" -m iprange");
945 fw3_pr(" %s%s %s", src->invert ? "! " : "",
946 src->range ? "--src-range" : "-s",
947 fw3_address_to_string(src, false));
950 if (dest && dest->set)
952 fw3_pr(" %s%s %s", dest->invert ? "! " : "",
953 dest->range ? "--dst-range" : "-d",
954 fw3_address_to_string(dest, false));
959 fw3_format_sport_dport(struct fw3_port *sp, struct fw3_port *dp)
963 if (sp->port_min == sp->port_max)
964 fw3_pr(" %s--sport %u", sp->invert ? "! " : "", sp->port_min);
966 fw3_pr(" %s--sport %u:%u",
967 sp->invert ? "! " : "", sp->port_min, sp->port_max);
972 if (dp->port_min == dp->port_max)
973 fw3_pr(" %s--dport %u", dp->invert ? "! " : "", dp->port_min);
975 fw3_pr(" %s--dport %u:%u",
976 dp->invert ? "! " : "", dp->port_min, dp->port_max);
981 fw3_format_mac(struct fw3_mac *mac)
986 fw3_pr(" -m mac %s--mac-source %s",
987 mac->invert ? "! " : "", ether_ntoa(&mac->mac));
991 fw3_format_protocol(struct fw3_protocol *proto, enum fw3_family family)
998 pr = proto->protocol;
1000 if (pr == 1 && family == FW3_FAMILY_V6)
1006 fw3_pr(" %s-p %u", proto->invert ? "! " : "", pr);
1010 fw3_format_icmptype(struct fw3_icmptype *icmp, enum fw3_family family)
1015 if (family != FW3_FAMILY_V6)
1017 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
1018 fw3_pr(" %s--icmp-type %u", icmp->invert ? "! " : "", icmp->type);
1020 fw3_pr(" %s--icmp-type %u/%u",
1021 icmp->invert ? "! " : "", icmp->type, icmp->code_min);
1025 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
1026 fw3_pr(" %s--icmpv6-type %u", icmp->invert ? "! " : "", icmp->type6);
1028 fw3_pr(" %s--icmpv6-type %u/%u",
1029 icmp->invert ? "! " : "", icmp->type6, icmp->code6_min);
1034 fw3_format_limit(struct fw3_limit *limit)
1039 if (limit->rate > 0)
1041 fw3_pr(" -m limit %s--limit %u/%s",
1042 limit->invert ? "! " : "",
1043 limit->rate, limit_units[limit->unit]);
1045 if (limit->burst > 0)
1046 fw3_pr(" --limit-burst %u", limit->burst);
1051 fw3_format_ipset(struct fw3_ipset *ipset, bool invert)
1054 const char *name = NULL;
1055 struct fw3_ipset_datatype *type;
1060 name = ipset->external ? ipset->external : ipset->name;
1062 fw3_pr(" -m set %s--match-set %s", invert ? "! " : "", name);
1064 list_for_each_entry(type, &ipset->datatypes, list)
1066 fw3_pr("%c%s", first ? ' ' : ',', type->dest ? "dst" : "src");
1072 fw3_format_time(struct fw3_time *time)
1075 struct tm empty = { 0 };
1076 char buf[sizeof("9999-99-99T23:59:59\0")];
1077 bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
1078 bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
1081 if (!d1 && !d2 && !time->timestart && !time->timestop &&
1082 !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
1094 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
1095 fw3_pr(" --datestart %s", buf);
1100 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
1101 fw3_pr(" --datestop %s", buf);
1104 if (time->timestart)
1106 fw3_pr(" --timestart %02d:%02d:%02d",
1107 time->timestart / 3600,
1108 time->timestart % 3600 / 60,
1109 time->timestart % 60);
1114 fw3_pr(" --timestop %02d:%02d:%02d",
1115 time->timestop / 3600,
1116 time->timestop % 3600 / 60,
1117 time->timestop % 60);
1120 if (time->monthdays & 0xFFFFFFFE)
1122 fw3_pr(" %s--monthdays", hasbit(time->monthdays, 0) ? "! " : "");
1124 for (i = 1, first = true; i < 32; i++)
1126 if (hasbit(time->monthdays, i))
1128 fw3_pr("%c%u", first ? ' ' : ',', i);
1134 if (time->weekdays & 0xFE)
1136 fw3_pr(" %s--weekdays", hasbit(time->weekdays, 0) ? "! " : "");
1138 for (i = 1, first = true; i < 8; i++)
1140 if (hasbit(time->weekdays, i))
1142 fw3_pr("%c%u", first ? ' ' : ',', i);
1150 fw3_format_mark(struct fw3_mark *mark)
1155 fw3_pr(" -m mark %s--mark 0x%x", mark->invert ? "! " : "", mark->mark);
1157 if (mark->mask < 0xFFFFFFFF)
1158 fw3_pr("/0x%x", mark->mask);
1162 __fw3_format_comment(const char *comment, ...)
1168 if (!comment || !*comment)
1171 fw3_pr(" -m comment --comment \"");
1175 va_start(ap, comment);
1201 c = va_arg(ap, const char *);
1211 fw3_format_extra(const char *extra)
1213 if (!extra || !*extra)
1216 fw3_pr(" %s", extra);