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("device", string, rule, device),
32 FW3_OPT("direction", direction, rule, direction_out),
34 FW3_OPT("ipset", setmatch, rule, ipset),
36 FW3_LIST("proto", protocol, rule, proto),
38 FW3_LIST("src_ip", network, rule, ip_src),
39 FW3_LIST("src_mac", mac, rule, mac_src),
40 FW3_LIST("src_port", port, rule, port_src),
42 FW3_LIST("dest_ip", network, rule, ip_dest),
43 FW3_LIST("dest_port", port, rule, port_dest),
45 FW3_LIST("icmp_type", icmptype, rule, icmp_type),
46 FW3_OPT("extra", string, rule, extra),
48 FW3_OPT("limit", limit, rule, limit),
49 FW3_OPT("limit_burst", int, rule, limit.burst),
51 FW3_OPT("utc_time", bool, rule, time.utc),
52 FW3_OPT("start_date", date, rule, time.datestart),
53 FW3_OPT("stop_date", date, rule, time.datestop),
54 FW3_OPT("start_time", time, rule, time.timestart),
55 FW3_OPT("stop_time", time, rule, time.timestop),
56 FW3_OPT("weekdays", weekdays, rule, time.weekdays),
57 FW3_OPT("monthdays", monthdays, rule, time.monthdays),
59 FW3_OPT("mark", mark, rule, mark),
60 FW3_OPT("set_mark", mark, rule, set_mark),
61 FW3_OPT("set_xmark", mark, rule, set_xmark),
63 FW3_OPT("target", target, rule, target),
70 need_src_action_chain(struct fw3_rule *r)
72 return (r->_src && r->_src->log && (r->target > FW3_FLAG_ACCEPT));
76 fw3_load_rules(struct fw3_state *state, struct uci_package *p)
78 struct uci_section *s;
79 struct uci_element *e;
80 struct fw3_rule *rule;
82 INIT_LIST_HEAD(&state->rules);
84 uci_foreach_element(&p->sections, e)
86 s = uci_to_section(e);
88 if (strcmp(s->type, "rule"))
91 rule = malloc(sizeof(*rule));
96 memset(rule, 0, sizeof(*rule));
98 INIT_LIST_HEAD(&rule->proto);
100 INIT_LIST_HEAD(&rule->ip_src);
101 INIT_LIST_HEAD(&rule->mac_src);
102 INIT_LIST_HEAD(&rule->port_src);
104 INIT_LIST_HEAD(&rule->ip_dest);
105 INIT_LIST_HEAD(&rule->port_dest);
107 INIT_LIST_HEAD(&rule->icmp_type);
109 rule->enabled = true;
111 if (!fw3_parse_options(rule, fw3_rule_opts, s))
113 warn_elem(e, "skipped due to invalid options");
124 if (rule->src.invert || rule->dest.invert)
126 warn_elem(e, "must not have inverted 'src' or 'dest' options");
130 else if (rule->src.set && !rule->src.any &&
131 !(rule->_src = fw3_lookup_zone(state, rule->src.name)))
133 warn_elem(e, "refers to not existing zone '%s'", rule->src.name);
137 else if (rule->dest.set && !rule->dest.any &&
138 !(rule->_dest = fw3_lookup_zone(state, rule->dest.name)))
140 warn_elem(e, "refers to not existing zone '%s'", rule->dest.name);
144 else if (rule->ipset.set && state->disable_ipsets)
146 warn_elem(e, "skipped due to disabled ipset support");
150 else if (rule->ipset.set &&
151 !(rule->ipset.ptr = fw3_lookup_ipset(state, rule->ipset.name)))
153 warn_elem(e, "refers to unknown ipset '%s'", rule->ipset.name);
158 if (!rule->_src && rule->target == FW3_FLAG_NOTRACK)
160 warn_elem(e, "is set to target NOTRACK but has no source assigned");
165 if (!rule->set_mark.set && !rule->set_xmark.set &&
166 rule->target == FW3_FLAG_MARK)
168 warn_elem(e, "is set to target MARK but specifies neither "
169 "'set_mark' nor 'set_xmark' option");
174 if (rule->_dest && rule->target == FW3_FLAG_MARK)
176 warn_elem(e, "must not specify 'dest' for MARK target");
181 if (rule->set_mark.invert || rule->set_xmark.invert)
183 warn_elem(e, "must not have inverted 'set_mark' or 'set_xmark'");
188 if (!rule->_src && !rule->_dest && !rule->src.any && !rule->dest.any)
190 warn_elem(e, "has neither a source nor a destination zone assigned "
191 "- assuming an output rule");
194 if (list_empty(&rule->proto))
196 warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
197 fw3_parse_protocol(&rule->proto, "tcpudp", true);
200 if (rule->target == FW3_FLAG_UNSPEC)
202 warn_elem(e, "has no target specified, defaulting to REJECT");
203 rule->target = FW3_FLAG_REJECT;
205 else if (rule->target > FW3_FLAG_MARK)
207 warn_elem(e, "has invalid target specified, defaulting to REJECT");
208 rule->target = FW3_FLAG_REJECT;
211 /* NB: rule family... */
214 setbit(rule->_dest->flags[0], rule->target);
215 setbit(rule->_dest->flags[1], rule->target);
217 else if (need_src_action_chain(rule))
219 setbit(rule->_src->flags[0], fw3_to_src_target(rule->target));
220 setbit(rule->_src->flags[1], fw3_to_src_target(rule->target));
223 list_add_tail(&rule->list, &state->rules);
230 append_chain(struct fw3_ipt_rule *r, struct fw3_rule *rule)
234 snprintf(chain, sizeof(chain), "delegate_output");
236 if (rule->target == FW3_FLAG_NOTRACK)
238 snprintf(chain, sizeof(chain), "zone_%s_notrack", rule->src.name);
240 else if (rule->target == FW3_FLAG_MARK)
242 snprintf(chain, sizeof(chain), "fwmark");
251 snprintf(chain, sizeof(chain), "zone_%s_forward",
254 snprintf(chain, sizeof(chain), "zone_%s_input",
260 snprintf(chain, sizeof(chain), "delegate_forward");
262 snprintf(chain, sizeof(chain), "delegate_input");
266 if (rule->dest.set && !rule->src.set)
269 snprintf(chain, sizeof(chain), "delegate_output");
271 snprintf(chain, sizeof(chain), "zone_%s_output",
276 fw3_ipt_rule_append(r, chain);
279 static void set_target(struct fw3_ipt_rule *r, struct fw3_rule *rule)
282 struct fw3_mark *mark;
283 char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
288 name = rule->set_mark.set ? "--set-mark" : "--set-xmark";
289 mark = rule->set_mark.set ? &rule->set_mark : &rule->set_xmark;
290 sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
292 fw3_ipt_rule_target(r, "MARK");
293 fw3_ipt_rule_addarg(r, false, name, buf);
296 case FW3_FLAG_NOTRACK:
297 fw3_ipt_rule_target(r, "CT");
298 fw3_ipt_rule_addarg(r, false, "--notrack", NULL);
301 case FW3_FLAG_ACCEPT:
303 name = fw3_flag_names[rule->target];
307 name = fw3_flag_names[FW3_FLAG_REJECT];
311 if (rule->dest.set && !rule->dest.any)
312 fw3_ipt_rule_target(r, "zone_%s_dest_%s", rule->dest.name, name);
313 else if (need_src_action_chain(rule))
314 fw3_ipt_rule_target(r, "zone_%s_src_%s", rule->src.name, name);
315 else if (strcmp(name, "REJECT"))
316 fw3_ipt_rule_target(r, name);
318 fw3_ipt_rule_target(r, "reject");
322 set_comment(struct fw3_ipt_rule *r, const char *name, int num)
325 fw3_ipt_rule_comment(r, name);
327 fw3_ipt_rule_comment(r, "@rule[%u]", num);
331 print_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
332 struct fw3_rule *rule, int num, struct fw3_protocol *proto,
333 struct fw3_address *sip, struct fw3_address *dip,
334 struct fw3_port *sport, struct fw3_port *dport,
335 struct fw3_mac *mac, struct fw3_icmptype *icmptype)
337 struct fw3_ipt_rule *r;
339 if (!fw3_is_family(sip, handle->family) ||
340 !fw3_is_family(dip, handle->family))
342 if ((sip && !sip->resolved) || (dip && !dip->resolved))
343 info(" ! Skipping due to different family of ip address");
348 if (proto->protocol == 58 && handle->family == FW3_FAMILY_V4)
350 info(" ! Skipping due to different family of protocol");
354 r = fw3_ipt_rule_create(handle, proto, NULL, NULL, sip, dip);
355 fw3_ipt_rule_sport_dport(r, sport, dport);
356 fw3_ipt_rule_device(r, rule->device, rule->direction_out);
357 fw3_ipt_rule_icmptype(r, icmptype);
358 fw3_ipt_rule_mac(r, mac);
359 fw3_ipt_rule_ipset(r, &rule->ipset);
360 fw3_ipt_rule_limit(r, &rule->limit);
361 fw3_ipt_rule_time(r, &rule->time);
362 fw3_ipt_rule_mark(r, &rule->mark);
364 fw3_ipt_rule_extra(r, rule->extra);
365 set_comment(r, rule->name, num);
366 append_chain(r, rule);
370 expand_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
371 struct fw3_rule *rule, int num)
373 struct fw3_protocol *proto;
374 struct fw3_address *sip;
375 struct fw3_address *dip;
376 struct fw3_port *sport;
377 struct fw3_port *dport;
379 struct fw3_icmptype *icmptype;
381 struct list_head *sports = NULL;
382 struct list_head *dports = NULL;
383 struct list_head *icmptypes = NULL;
385 struct list_head empty;
386 INIT_LIST_HEAD(&empty);
388 if (!fw3_is_family(rule, handle->family))
391 if ((rule->target == FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_RAW) ||
392 (rule->target == FW3_FLAG_MARK && handle->table != FW3_TABLE_MANGLE) ||
393 (rule->target < FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_FILTER))
397 info(" * Rule '%s'", rule->name);
399 info(" * Rule #%u", num);
401 if (!fw3_is_family(rule->_src, handle->family) ||
402 !fw3_is_family(rule->_dest, handle->family))
404 info(" ! Skipping due to different family of zone");
410 if (!fw3_is_family(rule->ipset.ptr, handle->family))
412 info(" ! Skipping due to different family in ipset");
416 if (!fw3_check_ipset(rule->ipset.ptr))
418 info(" ! Skipping due to missing ipset '%s'",
419 rule->ipset.ptr->external
420 ? rule->ipset.ptr->external : rule->ipset.ptr->name);
424 set(rule->ipset.ptr->flags, handle->family, handle->family);
427 list_for_each_entry(proto, &rule->proto, list)
429 /* icmp / ipv6-icmp */
430 if (proto->protocol == 1 || proto->protocol == 58)
434 icmptypes = &rule->icmp_type;
438 sports = &rule->port_src;
439 dports = &rule->port_dest;
443 fw3_foreach(sip, &rule->ip_src)
444 fw3_foreach(dip, &rule->ip_dest)
445 fw3_foreach(sport, sports)
446 fw3_foreach(dport, dports)
447 fw3_foreach(mac, &rule->mac_src)
448 fw3_foreach(icmptype, icmptypes)
449 print_rule(handle, state, rule, num, proto, sip, dip,
450 sport, dport, mac, icmptype);
455 fw3_print_rules(struct fw3_ipt_handle *handle, struct fw3_state *state)
458 struct fw3_rule *rule;
460 list_for_each_entry(rule, &state->rules, list)
461 expand_rule(handle, state, rule, num++);