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("name", string, rule, name),
24 FW3_OPT("family", family, rule, family),
26 FW3_OPT("src", device, rule, src),
27 FW3_OPT("dest", device, rule, dest),
29 FW3_OPT("ipset", device, rule, ipset),
31 FW3_LIST("proto", protocol, rule, proto),
33 FW3_LIST("src_ip", address, rule, ip_src),
34 FW3_LIST("src_mac", mac, rule, mac_src),
35 FW3_LIST("src_port", port, rule, port_src),
37 FW3_LIST("dest_ip", address, rule, ip_dest),
38 FW3_LIST("dest_port", port, rule, port_dest),
40 FW3_LIST("icmp_type", icmptype, rule, icmp_type),
41 FW3_OPT("extra", string, rule, extra),
43 FW3_OPT("limit", limit, rule, limit),
44 FW3_OPT("limit_burst", int, rule, limit.burst),
46 FW3_OPT("utc_time", bool, rule, time.utc),
47 FW3_OPT("start_date", date, rule, time.datestart),
48 FW3_OPT("stop_date", date, rule, time.datestop),
49 FW3_OPT("start_time", time, rule, time.timestart),
50 FW3_OPT("stop_time", time, rule, time.timestop),
51 FW3_OPT("weekdays", weekdays, rule, time.weekdays),
52 FW3_OPT("monthdays", monthdays, rule, time.monthdays),
54 FW3_OPT("target", target, rule, target),
61 fw3_load_rules(struct fw3_state *state, struct uci_package *p)
63 struct uci_section *s;
64 struct uci_element *e;
65 struct fw3_rule *rule;
67 INIT_LIST_HEAD(&state->rules);
69 uci_foreach_element(&p->sections, e)
71 s = uci_to_section(e);
73 if (strcmp(s->type, "rule"))
76 rule = malloc(sizeof(*rule));
81 memset(rule, 0, sizeof(*rule));
83 INIT_LIST_HEAD(&rule->proto);
85 INIT_LIST_HEAD(&rule->ip_src);
86 INIT_LIST_HEAD(&rule->mac_src);
87 INIT_LIST_HEAD(&rule->port_src);
89 INIT_LIST_HEAD(&rule->ip_dest);
90 INIT_LIST_HEAD(&rule->port_dest);
92 INIT_LIST_HEAD(&rule->icmp_type);
94 fw3_parse_options(rule, fw3_rule_opts, s);
96 if (rule->src.invert || rule->dest.invert)
98 warn_elem(e, "must not have inverted 'src' or 'dest' options");
102 else if (rule->src.set && !rule->src.any &&
103 !(rule->_src = fw3_lookup_zone(state, rule->src.name, false)))
105 warn_elem(e, "refers to not existing zone '%s'", rule->src.name);
109 else if (rule->dest.set && !rule->dest.any &&
110 !(rule->_dest = fw3_lookup_zone(state, rule->dest.name, false)))
112 warn_elem(e, "refers to not existing zone '%s'", rule->dest.name);
116 else if (rule->ipset.set && state->disable_ipsets)
118 warn_elem(e, "skipped due to disabled ipset support");
122 else if (rule->ipset.set && !rule->ipset.any &&
123 !(rule->_ipset = fw3_lookup_ipset(state, rule->ipset.name, false)))
125 warn_elem(e, "refers to unknown ipset '%s'", rule->ipset.name);
130 if (!rule->_src && rule->target == FW3_TARGET_NOTRACK)
132 warn_elem(e, "is set to target NOTRACK but has no source assigned");
137 if (!rule->_src && !rule->_dest && !rule->src.any && !rule->dest.any)
139 warn_elem(e, "has neither a source nor a destination zone assigned "
140 "- assuming an output rule");
143 if (rule->target == FW3_TARGET_UNSPEC)
145 warn_elem(e, "has no target specified, defaulting to REJECT");
146 rule->target = FW3_TARGET_REJECT;
148 else if (rule->target > FW3_TARGET_NOTRACK)
150 warn_elem(e, "has invalid target specified, defaulting to REJECT");
151 rule->target = FW3_TARGET_REJECT;
155 setbit(rule->_dest->dst_flags, rule->target);
157 list_add_tail(&rule->list, &state->rules);
164 print_chain(struct fw3_rule *rule)
168 sprintf(chain, "delegate_output");
170 if (rule->target == FW3_TARGET_NOTRACK)
172 sprintf(chain, "zone_%s_notrack", rule->src.name);
181 sprintf(chain, "zone_%s_forward", rule->src.name);
183 sprintf(chain, "zone_%s_input", rule->src.name);
188 sprintf(chain, "delegate_forward");
190 sprintf(chain, "delegate_input");
194 if (rule->dest.set && !rule->src.set)
195 sprintf(chain, "zone_%s_output", rule->dest.name);
198 fw3_pr("-A %s", chain);
201 static void print_target(struct fw3_rule *rule)
207 case FW3_TARGET_ACCEPT:
208 case FW3_TARGET_DROP:
209 case FW3_TARGET_NOTRACK:
210 target = fw3_flag_names[rule->target];
214 target = fw3_flag_names[FW3_TARGET_REJECT];
218 if (rule->dest.set && !rule->dest.any)
219 fw3_pr(" -j zone_%s_dest_%s\n", rule->dest.name, target);
220 else if (rule->target == FW3_TARGET_REJECT)
221 fw3_pr(" -j reject\n");
223 fw3_pr(" -j %s\n", target);
227 print_rule(enum fw3_table table, enum fw3_family family,
228 struct fw3_rule *rule, struct fw3_protocol *proto,
229 struct fw3_address *sip, struct fw3_address *dip,
230 struct fw3_port *sport, struct fw3_port *dport,
231 struct fw3_mac *mac, struct fw3_icmptype *icmptype)
233 if (!fw3_is_family(sip, family) || !fw3_is_family(dip, family))
235 info(" ! Skipping due to different family of ip address");
239 if (proto->protocol == 58 && family == FW3_FAMILY_V4)
241 info(" ! Skipping due to different family of protocol");
246 fw3_format_ipset(rule->_ipset, rule->ipset.invert);
247 fw3_format_protocol(proto, family);
248 fw3_format_src_dest(sip, dip);
249 fw3_format_sport_dport(sport, dport);
250 fw3_format_icmptype(icmptype, family);
252 fw3_format_limit(&rule->limit);
253 fw3_format_time(&rule->time);
254 fw3_format_extra(rule->extra);
255 fw3_format_comment(rule->name);
260 expand_rule(enum fw3_table table, enum fw3_family family,
261 struct fw3_rule *rule, int num)
263 struct fw3_protocol *proto;
264 struct fw3_address *sip;
265 struct fw3_address *dip;
266 struct fw3_port *sport;
267 struct fw3_port *dport;
269 struct fw3_icmptype *icmptype;
271 struct list_head *sports = NULL;
272 struct list_head *dports = NULL;
273 struct list_head *icmptypes = NULL;
275 struct list_head empty;
276 INIT_LIST_HEAD(&empty);
278 if (!fw3_is_family(rule, family))
281 if ((table == FW3_TABLE_RAW && rule->target != FW3_TARGET_NOTRACK) ||
282 (table != FW3_TABLE_FILTER))
286 info(" * Rule '%s'", rule->name);
288 info(" * Rule #%u", num);
290 if (!fw3_is_family(rule->_src, family) ||
291 !fw3_is_family(rule->_dest, family))
293 info(" ! Skipping due to different family of zone");
299 if (!fw3_is_family(rule->_ipset, family))
301 info(" ! Skipping due to different family in ipset");
305 setbit(rule->_ipset->flags, family);
308 list_for_each_entry(proto, &rule->proto, list)
310 /* icmp / ipv6-icmp */
311 if (proto->protocol == 1 || proto->protocol == 58)
315 icmptypes = &rule->icmp_type;
319 sports = &rule->port_src;
320 dports = &rule->port_dest;
324 fw3_foreach(sip, &rule->ip_src)
325 fw3_foreach(dip, &rule->ip_dest)
326 fw3_foreach(sport, sports)
327 fw3_foreach(dport, dports)
328 fw3_foreach(mac, &rule->mac_src)
329 fw3_foreach(icmptype, icmptypes)
330 print_rule(table, family, rule, proto, sip, dip, sport, dport,
336 fw3_print_rules(enum fw3_table table, enum fw3_family family,
337 struct fw3_state *state)
340 struct fw3_rule *rule;
342 list_for_each_entry(rule, &state->rules, list)
343 expand_rule(table, family, rule, num++);