2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013-2014 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.
26 #include "redirects.h"
35 static enum fw3_family print_family = FW3_FAMILY_ANY;
37 static struct fw3_state *run_state = NULL;
38 static struct fw3_state *cfg_state = NULL;
42 build_state(bool runtime)
44 struct fw3_state *state = NULL;
45 struct uci_package *p = NULL;
48 state = calloc(1, sizeof(*state));
50 error("Out of memory");
52 state->uci = uci_alloc_context();
55 error("Out of memory");
59 sf = fopen(FW3_STATEFILE, "r");
63 uci_import(state->uci, sf, "fw3_state", &p, true);
69 uci_free_context(state->uci);
75 state->statefile = true;
81 if (!fw3_ubus_connect())
82 error("Failed to connect to ubus");
84 if (uci_load(state->uci, "firewall", &p))
86 uci_perror(state->uci, NULL);
87 error("Failed to load /etc/config/firewall");
90 if (!fw3_find_command("ipset"))
92 warn("Unable to locate ipset utility, disabling ipset support");
93 state->disable_ipsets = true;
100 struct blob_buf b = {NULL, NULL, 0, NULL};
103 fw3_load_defaults(state, p);
104 fw3_load_ipsets(state, p);
105 fw3_load_zones(state, p);
106 fw3_load_rules(state, p, b.head);
107 fw3_load_redirects(state, p);
108 fw3_load_snats(state, p, b.head);
109 fw3_load_forwards(state, p);
110 fw3_load_includes(state, p);
116 free_state(struct fw3_state *state)
118 struct list_head *cur, *tmp;
120 list_for_each_safe(cur, tmp, &state->zones)
121 fw3_free_zone((struct fw3_zone *)cur);
123 list_for_each_safe(cur, tmp, &state->rules)
124 fw3_free_rule((struct fw3_rule *)cur);
126 list_for_each_safe(cur, tmp, &state->redirects)
127 fw3_free_redirect((struct fw3_redirect *)cur);
129 list_for_each_safe(cur, tmp, &state->snats)
130 fw3_free_snat((struct fw3_snat *)cur);
132 list_for_each_safe(cur, tmp, &state->forwards)
133 fw3_free_forward((struct fw3_forward *)cur);
135 list_for_each_safe(cur, tmp, &state->ipsets)
136 fw3_free_ipset((struct fw3_ipset *)cur);
138 list_for_each_safe(cur, tmp, &state->includes)
139 fw3_free_include((struct fw3_include *)cur);
141 uci_free_context(state->uci);
145 fw3_ubus_disconnect();
150 family_running(enum fw3_family family)
152 return (run_state && has(run_state->defaults.flags, family, family));
156 family_set(struct fw3_state *state, enum fw3_family family, bool set)
162 set(state->defaults.flags, family, family);
164 del(state->defaults.flags, family, family);
171 enum fw3_family family;
172 enum fw3_table table;
173 struct fw3_ipt_handle *handle;
175 if (!complete && !run_state)
177 warn("The firewall appears to be stopped. "
178 "Use the 'flush' command to forcefully purge all rules.");
183 if (!print_family && run_state)
184 fw3_hotplug_zones(run_state, false);
186 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
188 if (!complete && !family_running(family))
191 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
193 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
196 if (!(handle = fw3_ipt_open(family, table)))
199 info(" * %sing %s %s table", complete ? "Flush" : "Clear",
200 fw3_flag_names[family], fw3_flag_names[table]);
204 fw3_flush_all(handle);
208 fw3_flush_rules(handle, run_state, false);
209 fw3_flush_zones(handle, run_state, false);
212 fw3_ipt_commit(handle);
213 fw3_ipt_close(handle);
216 family_set(run_state, family, false);
217 family_set(cfg_state, family, false);
223 fw3_destroy_ipsets(run_state);
226 fw3_flush_conntrack(NULL);
228 if (!rv && run_state)
229 fw3_write_statefile(run_state);
238 enum fw3_family family;
239 enum fw3_table table;
240 struct fw3_ipt_handle *handle;
243 fw3_create_ipsets(cfg_state);
245 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
247 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
250 if (print_family && family != print_family)
253 if (!print_family && family_running(family))
255 warn("The %s firewall appears to be started already. "
256 "If it is indeed empty, remove the %s file and retry.",
257 fw3_flag_names[family], FW3_STATEFILE);
262 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
264 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
267 if (!(handle = fw3_ipt_open(family, table)))
270 info(" * Populating %s %s table",
271 fw3_flag_names[family], fw3_flag_names[table]);
273 fw3_print_default_chains(handle, cfg_state, false);
274 fw3_print_zone_chains(handle, cfg_state, false);
275 fw3_print_default_head_rules(handle, cfg_state, false);
276 fw3_print_rules(handle, cfg_state);
277 fw3_print_redirects(handle, cfg_state);
278 fw3_print_snats(handle, cfg_state);
279 fw3_print_forwards(handle, cfg_state);
280 fw3_print_zone_rules(handle, cfg_state, false);
281 fw3_print_default_tail_rules(handle, cfg_state, false);
284 fw3_ipt_commit(handle);
286 fw3_ipt_close(handle);
290 fw3_print_includes(cfg_state, family, false);
292 family_set(run_state, family, true);
293 family_set(cfg_state, family, true);
300 fw3_flush_conntrack(run_state);
301 fw3_set_defaults(cfg_state);
305 fw3_run_includes(cfg_state, false);
306 fw3_hotplug_zones(cfg_state, true);
307 fw3_write_statefile(cfg_state);
319 enum fw3_family family;
320 enum fw3_table table;
321 struct fw3_ipt_handle *handle;
326 fw3_hotplug_zones(run_state, false);
328 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
330 if (!family_running(family))
333 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
335 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
338 if (!(handle = fw3_ipt_open(family, table)))
341 info(" * Clearing %s %s table",
342 fw3_flag_names[family], fw3_flag_names[table]);
344 fw3_flush_rules(handle, run_state, true);
345 fw3_flush_zones(handle, run_state, true);
346 fw3_ipt_commit(handle);
347 fw3_ipt_close(handle);
350 family_set(run_state, family, false);
351 family_set(cfg_state, family, false);
354 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
357 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
359 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
362 if (!(handle = fw3_ipt_open(family, table)))
365 info(" * Populating %s %s table",
366 fw3_flag_names[family], fw3_flag_names[table]);
368 fw3_print_default_chains(handle, cfg_state, true);
369 fw3_print_zone_chains(handle, cfg_state, true);
370 fw3_print_default_head_rules(handle, cfg_state, true);
371 fw3_print_rules(handle, cfg_state);
372 fw3_print_redirects(handle, cfg_state);
373 fw3_print_snats(handle, cfg_state);
374 fw3_print_forwards(handle, cfg_state);
375 fw3_print_zone_rules(handle, cfg_state, true);
376 fw3_print_default_tail_rules(handle, cfg_state, true);
378 fw3_ipt_commit(handle);
379 fw3_ipt_close(handle);
382 fw3_print_includes(cfg_state, family, true);
384 family_set(run_state, family, true);
385 family_set(cfg_state, family, true);
392 fw3_flush_conntrack(run_state);
394 fw3_set_defaults(cfg_state);
395 fw3_run_includes(cfg_state, true);
396 fw3_hotplug_zones(cfg_state, true);
397 fw3_write_statefile(cfg_state);
404 lookup_network(const char *net)
407 struct fw3_device *d;
409 list_for_each_entry(z, &cfg_state->zones, list)
411 list_for_each_entry(d, &z->networks, list)
413 if (!strcmp(d->name, net))
415 printf("%s\n", z->name);
425 lookup_device(const char *dev)
428 struct fw3_device *d;
430 list_for_each_entry(z, &cfg_state->zones, list)
432 list_for_each_entry(d, &z->devices, list)
434 if (!strcmp(d->name, dev))
436 printf("%s\n", z->name);
446 lookup_zone(const char *zone, const char *device)
449 struct fw3_device *d;
451 list_for_each_entry(z, &cfg_state->zones, list)
453 if (strcmp(z->name, zone))
456 list_for_each_entry(d, &z->devices, list)
458 if (device && strcmp(device, d->name))
461 printf("%s\n", d->name);
477 fprintf(stderr, "fw3 [-4] [-6] [-q] print\n");
478 fprintf(stderr, "fw3 [-q] {start|stop|flush|reload|restart}\n");
479 fprintf(stderr, "fw3 [-q] network {net}\n");
480 fprintf(stderr, "fw3 [-q] device {dev}\n");
481 fprintf(stderr, "fw3 [-q] zone {zone} [dev]\n");
487 int main(int argc, char **argv)
490 enum fw3_family family = FW3_FAMILY_ANY;
491 struct fw3_defaults *defs = NULL;
493 while ((ch = getopt(argc, argv, "46dqh")) != -1)
498 family = FW3_FAMILY_V4;
502 family = FW3_FAMILY_V6;
510 if (freopen("/dev/null", "w", stderr)) {}
521 defs = &cfg_state->defaults;
529 if (!strcmp(argv[optind], "print"))
531 if (family == FW3_FAMILY_ANY)
533 family = FW3_FAMILY_V4;
535 else if (family == FW3_FAMILY_V6)
537 if (defs->disable_ipv6)
538 warn("IPv6 rules globally disabled in configuration");
541 warn("IPv6 support is not compiled in");
545 if (freopen("/dev/null", "w", stderr)) {};
547 cfg_state->disable_ipsets = true;
548 print_family = family;
553 else if (!strcmp(argv[optind], "start"))
561 else if (!strcmp(argv[optind], "stop"))
569 else if (!strcmp(argv[optind], "flush"))
577 else if (!strcmp(argv[optind], "restart"))
586 else if (!strcmp(argv[optind], "reload"))
594 else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
596 rv = lookup_network(argv[optind + 1]);
598 else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
600 rv = lookup_device(argv[optind + 1]);
602 else if (!strcmp(argv[optind], "zone") && (optind + 1) < argc)
604 rv = lookup_zone(argv[optind + 1], argv[optind + 2]);
613 free_state(cfg_state);
616 free_state(run_state);