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 const struct fw3_option fw3_rule_opts[] = {
23 FW3_OPT("enabled", bool, rule, enabled),
25 FW3_OPT("name", string, rule, name),
26 FW3_OPT("family", family, rule, family),
28 FW3_OPT("src", device, rule, src),
29 FW3_OPT("dest", device, rule, dest),
31 FW3_OPT("ipset", device, rule, ipset),
33 FW3_LIST("proto", protocol, rule, proto),
35 FW3_LIST("src_ip", address, rule, ip_src),
36 FW3_LIST("src_mac", mac, rule, mac_src),
37 FW3_LIST("src_port", port, rule, port_src),
39 FW3_LIST("dest_ip", address, rule, ip_dest),
40 FW3_LIST("dest_port", port, rule, port_dest),
42 FW3_LIST("icmp_type", icmptype, rule, icmp_type),
43 FW3_OPT("extra", string, rule, extra),
45 FW3_OPT("limit", limit, rule, limit),
46 FW3_OPT("limit_burst", int, rule, limit.burst),
48 FW3_OPT("utc_time", bool, rule, time.utc),
49 FW3_OPT("start_date", date, rule, time.datestart),
50 FW3_OPT("stop_date", date, rule, time.datestop),
51 FW3_OPT("start_time", time, rule, time.timestart),
52 FW3_OPT("stop_time", time, rule, time.timestop),
53 FW3_OPT("weekdays", weekdays, rule, time.weekdays),
54 FW3_OPT("monthdays", monthdays, rule, time.monthdays),
56 FW3_OPT("mark", mark, rule, mark),
57 FW3_OPT("set_mark", mark, rule, set_mark),
58 FW3_OPT("set_xmark", mark, rule, set_xmark),
60 FW3_OPT("target", target, rule, target),
67 fw3_load_rules(struct fw3_state *state, struct uci_package *p)
69 struct uci_section *s;
70 struct uci_element *e;
71 struct fw3_rule *rule;
73 INIT_LIST_HEAD(&state->rules);
75 uci_foreach_element(&p->sections, e)
77 s = uci_to_section(e);
79 if (strcmp(s->type, "rule"))
82 rule = malloc(sizeof(*rule));
87 memset(rule, 0, sizeof(*rule));
89 INIT_LIST_HEAD(&rule->proto);
91 INIT_LIST_HEAD(&rule->ip_src);
92 INIT_LIST_HEAD(&rule->mac_src);
93 INIT_LIST_HEAD(&rule->port_src);
95 INIT_LIST_HEAD(&rule->ip_dest);
96 INIT_LIST_HEAD(&rule->port_dest);
98 INIT_LIST_HEAD(&rule->icmp_type);
100 rule->enabled = true;
102 fw3_parse_options(rule, fw3_rule_opts, s);
110 if (rule->src.invert || rule->dest.invert)
112 warn_elem(e, "must not have inverted 'src' or 'dest' options");
116 else if (rule->src.set && !rule->src.any &&
117 !(rule->_src = fw3_lookup_zone(state, rule->src.name)))
119 warn_elem(e, "refers to not existing zone '%s'", rule->src.name);
123 else if (rule->dest.set && !rule->dest.any &&
124 !(rule->_dest = fw3_lookup_zone(state, rule->dest.name)))
126 warn_elem(e, "refers to not existing zone '%s'", rule->dest.name);
130 else if (rule->ipset.set && state->disable_ipsets)
132 warn_elem(e, "skipped due to disabled ipset support");
136 else if (rule->ipset.set && !rule->ipset.any &&
137 !(rule->_ipset = fw3_lookup_ipset(state, rule->ipset.name)))
139 warn_elem(e, "refers to unknown ipset '%s'", rule->ipset.name);
144 if (!rule->_src && rule->target == FW3_FLAG_NOTRACK)
146 warn_elem(e, "is set to target NOTRACK but has no source assigned");
151 if (!rule->set_mark.set && !rule->set_xmark.set &&
152 rule->target == FW3_FLAG_MARK)
154 warn_elem(e, "is set to target MARK but specifies neither "
155 "'set_mark' nor 'set_xmark' option");
160 if (rule->_dest && rule->target == FW3_FLAG_MARK)
162 warn_elem(e, "must not specify 'dest' for MARK target");
167 if (rule->set_mark.invert || rule->set_xmark.invert)
169 warn_elem(e, "must not have inverted 'set_mark' or 'set_xmark'");
174 if (!rule->_src && !rule->_dest && !rule->src.any && !rule->dest.any)
176 warn_elem(e, "has neither a source nor a destination zone assigned "
177 "- assuming an output rule");
180 if (list_empty(&rule->proto))
182 warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
183 fw3_parse_protocol(&rule->proto, "tcpudp", true);
186 if (rule->target == FW3_FLAG_UNSPEC)
188 warn_elem(e, "has no target specified, defaulting to REJECT");
189 rule->target = FW3_FLAG_REJECT;
191 else if (rule->target > FW3_FLAG_MARK)
193 warn_elem(e, "has invalid target specified, defaulting to REJECT");
194 rule->target = FW3_FLAG_REJECT;
197 /* NB: rule family... */
200 setbit(rule->_dest->flags[0], rule->target);
201 setbit(rule->_dest->flags[1], rule->target);
204 list_add_tail(&rule->list, &state->rules);
211 print_chain(struct fw3_rule *rule)
215 sprintf(chain, "delegate_output");
217 if (rule->target == FW3_FLAG_NOTRACK)
219 sprintf(chain, "zone_%s_notrack", rule->src.name);
221 else if (rule->target == FW3_FLAG_MARK)
223 sprintf(chain, "fwmark");
232 sprintf(chain, "zone_%s_forward", rule->src.name);
234 sprintf(chain, "zone_%s_input", rule->src.name);
239 sprintf(chain, "delegate_forward");
241 sprintf(chain, "delegate_input");
245 if (rule->dest.set && !rule->src.set)
246 sprintf(chain, "zone_%s_output", rule->dest.name);
249 fw3_pr("-A %s", chain);
252 static void print_target(struct fw3_rule *rule)
259 if (rule->set_mark.set)
260 fw3_pr(" -j MARK --set-mark 0x%x/0x%x\n",
261 rule->set_mark.mark, rule->set_mark.mask);
263 fw3_pr(" -j MARK --set-xmark 0x%x/0x%x\n",
264 rule->set_xmark.mark, rule->set_xmark.mask);
267 case FW3_FLAG_ACCEPT:
269 case FW3_FLAG_NOTRACK:
270 target = fw3_flag_names[rule->target];
274 target = fw3_flag_names[FW3_FLAG_REJECT];
278 if (rule->dest.set && !rule->dest.any)
279 fw3_pr(" -j zone_%s_dest_%s\n", rule->dest.name, target);
280 else if (rule->target == FW3_FLAG_REJECT)
281 fw3_pr(" -j reject\n");
283 fw3_pr(" -j %s\n", target);
287 print_rule(struct fw3_state *state, enum fw3_family family,
288 enum fw3_table table, struct fw3_rule *rule,
289 struct fw3_protocol *proto,
290 struct fw3_address *sip, struct fw3_address *dip,
291 struct fw3_port *sport, struct fw3_port *dport,
292 struct fw3_mac *mac, struct fw3_icmptype *icmptype)
294 if (!fw3_is_family(sip, family) || !fw3_is_family(dip, family))
296 info(" ! Skipping due to different family of ip address");
300 if (proto->protocol == 58 && family == FW3_FAMILY_V4)
302 info(" ! Skipping due to different family of protocol");
307 fw3_format_ipset(rule->_ipset, rule->ipset.invert);
308 fw3_format_protocol(proto, family);
309 fw3_format_src_dest(sip, dip);
310 fw3_format_sport_dport(sport, dport);
311 fw3_format_icmptype(icmptype, family);
313 fw3_format_limit(&rule->limit);
314 fw3_format_time(&rule->time);
315 fw3_format_mark(&rule->mark);
316 fw3_format_extra(rule->extra);
317 fw3_format_comment(rule->name);
322 expand_rule(struct fw3_state *state, enum fw3_family family,
323 enum fw3_table table, struct fw3_rule *rule, int num)
325 struct fw3_protocol *proto;
326 struct fw3_address *sip;
327 struct fw3_address *dip;
328 struct fw3_port *sport;
329 struct fw3_port *dport;
331 struct fw3_icmptype *icmptype;
333 struct list_head *sports = NULL;
334 struct list_head *dports = NULL;
335 struct list_head *icmptypes = NULL;
337 struct list_head empty;
338 INIT_LIST_HEAD(&empty);
340 if (!fw3_is_family(rule, family))
343 if ((rule->target == FW3_FLAG_NOTRACK && table != FW3_TABLE_RAW) ||
344 (rule->target == FW3_FLAG_MARK && table != FW3_TABLE_MANGLE) ||
345 (rule->target < FW3_FLAG_NOTRACK && table != FW3_TABLE_FILTER))
349 info(" * Rule '%s'", rule->name);
351 info(" * Rule #%u", num);
353 if (!fw3_is_family(rule->_src, family) ||
354 !fw3_is_family(rule->_dest, family))
356 info(" ! Skipping due to different family of zone");
362 if (!fw3_is_family(rule->_ipset, family))
364 info(" ! Skipping due to different family in ipset");
368 if (!fw3_check_ipset(rule->_ipset))
370 info(" ! Skipping due to missing ipset '%s'",
371 (rule->_ipset->external && *rule->_ipset->external) ?
372 rule->_ipset->external : rule->_ipset->name);
376 set(rule->_ipset->flags, family, family);
379 list_for_each_entry(proto, &rule->proto, list)
381 /* icmp / ipv6-icmp */
382 if (proto->protocol == 1 || proto->protocol == 58)
386 icmptypes = &rule->icmp_type;
390 sports = &rule->port_src;
391 dports = &rule->port_dest;
395 fw3_foreach(sip, &rule->ip_src)
396 fw3_foreach(dip, &rule->ip_dest)
397 fw3_foreach(sport, sports)
398 fw3_foreach(dport, dports)
399 fw3_foreach(mac, &rule->mac_src)
400 fw3_foreach(icmptype, icmptypes)
401 print_rule(state, family, table, rule, proto, sip, dip,
402 sport, dport, mac, icmptype);
407 fw3_print_rules(struct fw3_state *state, enum fw3_family family,
408 enum fw3_table table)
411 struct fw3_rule *rule;
413 list_for_each_entry(rule, &state->rules, list)
414 expand_rule(state, family, table, rule, num++);