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("target", target, rule, target),
53 fw3_load_rules(struct fw3_state *state, struct uci_package *p)
55 struct uci_section *s;
56 struct uci_element *e;
57 struct fw3_rule *rule;
59 INIT_LIST_HEAD(&state->rules);
61 uci_foreach_element(&p->sections, e)
63 s = uci_to_section(e);
65 if (strcmp(s->type, "rule"))
68 rule = malloc(sizeof(*rule));
73 memset(rule, 0, sizeof(*rule));
75 INIT_LIST_HEAD(&rule->proto);
77 INIT_LIST_HEAD(&rule->ip_src);
78 INIT_LIST_HEAD(&rule->mac_src);
79 INIT_LIST_HEAD(&rule->port_src);
81 INIT_LIST_HEAD(&rule->ip_dest);
82 INIT_LIST_HEAD(&rule->port_dest);
84 INIT_LIST_HEAD(&rule->icmp_type);
86 fw3_parse_options(rule, fw3_rule_opts, s);
88 if (rule->src.invert || rule->dest.invert)
90 warn_elem(e, "must not have inverted 'src' or 'dest' options");
94 else if (rule->src.set && !rule->src.any &&
95 !(rule->_src = fw3_lookup_zone(state, rule->src.name, false)))
97 warn_elem(e, "refers to not existing zone '%s'", rule->src.name);
101 else if (rule->dest.set && !rule->dest.any &&
102 !(rule->_dest = fw3_lookup_zone(state, rule->dest.name, false)))
104 warn_elem(e, "refers to not existing zone '%s'", rule->dest.name);
108 else if (rule->ipset.set && state->disable_ipsets)
110 warn_elem(e, "skipped due to disabled ipset support");
114 else if (rule->ipset.set && !rule->ipset.any &&
115 !(rule->_ipset = fw3_lookup_ipset(state, rule->ipset.name, false)))
117 warn_elem(e, "refers to unknown ipset '%s'", rule->ipset.name);
122 if (!rule->_src && rule->target == FW3_TARGET_NOTRACK)
124 warn_elem(e, "is set to target NOTRACK but has no source assigned");
129 if (!rule->_src && !rule->_dest && !rule->src.any && !rule->dest.any)
131 warn_elem(e, "has neither a source nor a destination zone assigned "
132 "- assuming an output rule");
135 if (rule->target == FW3_TARGET_UNSPEC)
137 warn_elem(e, "has no target specified, defaulting to REJECT");
138 rule->target = FW3_TARGET_REJECT;
140 else if (rule->target > FW3_TARGET_NOTRACK)
142 warn_elem(e, "has invalid target specified, defaulting to REJECT");
143 rule->target = FW3_TARGET_REJECT;
147 setbit(rule->_dest->dst_flags, rule->target);
149 list_add_tail(&rule->list, &state->rules);
156 print_chain(struct fw3_rule *rule)
160 sprintf(chain, "delegate_output");
162 if (rule->target == FW3_TARGET_NOTRACK)
164 sprintf(chain, "zone_%s_notrack", rule->src.name);
173 sprintf(chain, "zone_%s_forward", rule->src.name);
175 sprintf(chain, "zone_%s_input", rule->src.name);
180 sprintf(chain, "delegate_forward");
182 sprintf(chain, "delegate_input");
186 if (rule->dest.set && !rule->src.set)
187 sprintf(chain, "zone_%s_output", rule->dest.name);
190 fw3_pr("-A %s", chain);
193 static void print_target(struct fw3_rule *rule)
199 case FW3_TARGET_ACCEPT:
200 case FW3_TARGET_DROP:
201 case FW3_TARGET_NOTRACK:
202 target = fw3_flag_names[rule->target];
206 target = fw3_flag_names[FW3_TARGET_REJECT];
210 if (rule->dest.set && !rule->dest.any)
211 fw3_pr(" -j zone_%s_dest_%s\n", rule->dest.name, target);
212 else if (rule->target == FW3_TARGET_REJECT)
213 fw3_pr(" -j reject\n");
215 fw3_pr(" -j %s\n", target);
219 print_rule(enum fw3_table table, enum fw3_family family,
220 struct fw3_rule *rule, struct fw3_protocol *proto,
221 struct fw3_address *sip, struct fw3_address *dip,
222 struct fw3_port *sport, struct fw3_port *dport,
223 struct fw3_mac *mac, struct fw3_icmptype *icmptype)
225 if (!fw3_is_family(sip, family) || !fw3_is_family(dip, family))
227 info(" ! Skipping due to different family of ip address");
231 if (proto->protocol == 58 && family == FW3_FAMILY_V4)
233 info(" ! Skipping due to different family of protocol");
238 fw3_format_ipset(rule->_ipset, rule->ipset.invert);
239 fw3_format_protocol(proto, family);
240 fw3_format_src_dest(sip, dip);
241 fw3_format_sport_dport(sport, dport);
242 fw3_format_icmptype(icmptype, family);
244 fw3_format_limit(&rule->limit);
245 fw3_format_extra(rule->extra);
246 fw3_format_comment(rule->name);
251 expand_rule(enum fw3_table table, enum fw3_family family,
252 struct fw3_rule *rule, int num)
254 struct fw3_protocol *proto;
255 struct fw3_address *sip;
256 struct fw3_address *dip;
257 struct fw3_port *sport;
258 struct fw3_port *dport;
260 struct fw3_icmptype *icmptype;
262 struct list_head *sports = NULL;
263 struct list_head *dports = NULL;
264 struct list_head *icmptypes = NULL;
266 struct list_head empty;
267 INIT_LIST_HEAD(&empty);
269 if (!fw3_is_family(rule, family))
272 if ((table == FW3_TABLE_RAW && rule->target != FW3_TARGET_NOTRACK) ||
273 (table != FW3_TABLE_FILTER))
277 info(" * Rule '%s'", rule->name);
279 info(" * Rule #%u", num);
281 if (!fw3_is_family(rule->_src, family) ||
282 !fw3_is_family(rule->_dest, family))
284 info(" ! Skipping due to different family of zone");
290 if (!fw3_is_family(rule->_ipset, family))
292 info(" ! Skipping due to different family in ipset");
296 setbit(rule->_ipset->flags, family);
299 list_for_each_entry(proto, &rule->proto, list)
301 /* icmp / ipv6-icmp */
302 if (proto->protocol == 1 || proto->protocol == 58)
306 icmptypes = &rule->icmp_type;
310 sports = &rule->port_src;
311 dports = &rule->port_dest;
315 fw3_foreach(sip, &rule->ip_src)
316 fw3_foreach(dip, &rule->ip_dest)
317 fw3_foreach(sport, sports)
318 fw3_foreach(dport, dports)
319 fw3_foreach(mac, &rule->mac_src)
320 fw3_foreach(icmptype, icmptypes)
321 print_rule(table, family, rule, proto, sip, dip, sport, dport,
327 fw3_print_rules(enum fw3_table table, enum fw3_family family,
328 struct fw3_state *state)
331 struct fw3_rule *rule;
333 list_for_each_entry(rule, &state->rules, list)
334 expand_rule(table, family, rule, num++);