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 = malloc(sizeof(*state));
51 error("Out of memory");
53 memset(state, 0, sizeof(*state));
54 state->uci = uci_alloc_context();
57 error("Out of memory");
61 sf = fopen(FW3_STATEFILE, "r");
65 uci_import(state->uci, sf, "fw3_state", &p, true);
71 uci_free_context(state->uci);
77 state->statefile = true;
83 if (!fw3_ubus_connect())
84 error("Failed to connect to ubus");
86 if (uci_load(state->uci, "firewall", &p))
88 uci_perror(state->uci, NULL);
89 error("Failed to load /etc/config/firewall");
92 if (!fw3_find_command("ipset"))
94 warn("Unable to locate ipset utility, disabling ipset support");
95 state->disable_ipsets = true;
101 fw3_load_defaults(state, p);
102 fw3_load_ipsets(state, p);
103 fw3_load_zones(state, p);
104 fw3_load_rules(state, p);
105 fw3_load_redirects(state, p);
106 fw3_load_snats(state, p);
107 fw3_load_forwards(state, p);
108 fw3_load_includes(state, p);
114 free_state(struct fw3_state *state)
116 struct list_head *cur, *tmp;
118 list_for_each_safe(cur, tmp, &state->zones)
119 fw3_free_zone((struct fw3_zone *)cur);
121 list_for_each_safe(cur, tmp, &state->rules)
122 fw3_free_rule((struct fw3_rule *)cur);
124 list_for_each_safe(cur, tmp, &state->redirects)
125 fw3_free_redirect((struct fw3_redirect *)cur);
127 list_for_each_safe(cur, tmp, &state->snats)
128 fw3_free_snat((struct fw3_snat *)cur);
130 list_for_each_safe(cur, tmp, &state->forwards)
131 fw3_free_forward((struct fw3_forward *)cur);
133 list_for_each_safe(cur, tmp, &state->ipsets)
134 fw3_free_ipset((struct fw3_ipset *)cur);
136 list_for_each_safe(cur, tmp, &state->includes)
137 fw3_free_include((struct fw3_include *)cur);
139 uci_free_context(state->uci);
143 fw3_ubus_disconnect();
148 family_running(enum fw3_family family)
150 return (run_state && has(run_state->defaults.flags, family, family));
154 family_set(struct fw3_state *state, enum fw3_family family, bool set)
160 set(state->defaults.flags, family, family);
162 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);
225 if (complete && (ct = fopen("/proc/net/nf_conntrack", "w")) != NULL)
227 info(" * Flushing conntrack table ...");
229 fwrite("f\n", 2, 1, ct);
233 if (!rv && run_state)
234 fw3_write_statefile(run_state);
243 enum fw3_family family;
244 enum fw3_table table;
245 struct fw3_ipt_handle *handle;
248 fw3_create_ipsets(cfg_state);
250 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
252 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
255 if (print_family && family != print_family)
258 if (!print_family && family_running(family))
260 warn("The %s firewall appears to be started already. "
261 "If it is indeed empty, remove the %s file and retry.",
262 fw3_flag_names[family], FW3_STATEFILE);
267 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
269 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
272 if (!(handle = fw3_ipt_open(family, table)))
275 info(" * Populating %s %s table",
276 fw3_flag_names[family], fw3_flag_names[table]);
278 fw3_print_default_chains(handle, cfg_state, false);
279 fw3_print_zone_chains(handle, cfg_state, false);
280 fw3_print_default_head_rules(handle, cfg_state, false);
281 fw3_print_rules(handle, cfg_state);
282 fw3_print_redirects(handle, cfg_state);
283 fw3_print_snats(handle, cfg_state);
284 fw3_print_forwards(handle, cfg_state);
285 fw3_print_zone_rules(handle, cfg_state, false);
286 fw3_print_default_tail_rules(handle, cfg_state, false);
289 fw3_ipt_commit(handle);
291 fw3_ipt_close(handle);
295 fw3_print_includes(cfg_state, family, false);
297 family_set(run_state, family, true);
298 family_set(cfg_state, family, true);
305 fw3_set_defaults(cfg_state);
309 fw3_run_includes(cfg_state, false);
310 fw3_hotplug_zones(cfg_state, true);
311 fw3_write_statefile(cfg_state);
323 enum fw3_family family;
324 enum fw3_table table;
325 struct fw3_ipt_handle *handle;
330 fw3_hotplug_zones(run_state, false);
332 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
334 if (!family_running(family))
337 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
339 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
342 if (!(handle = fw3_ipt_open(family, table)))
345 info(" * Clearing %s %s table",
346 fw3_flag_names[family], fw3_flag_names[table]);
348 fw3_flush_rules(handle, run_state, true);
349 fw3_flush_zones(handle, run_state, true);
350 fw3_ipt_commit(handle);
351 fw3_ipt_close(handle);
354 family_set(run_state, family, false);
355 family_set(cfg_state, family, false);
358 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
361 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
363 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
366 if (!(handle = fw3_ipt_open(family, table)))
369 info(" * Populating %s %s table",
370 fw3_flag_names[family], fw3_flag_names[table]);
372 fw3_print_default_chains(handle, cfg_state, true);
373 fw3_print_zone_chains(handle, cfg_state, true);
374 fw3_print_default_head_rules(handle, cfg_state, true);
375 fw3_print_rules(handle, cfg_state);
376 fw3_print_redirects(handle, cfg_state);
377 fw3_print_snats(handle, cfg_state);
378 fw3_print_forwards(handle, cfg_state);
379 fw3_print_zone_rules(handle, cfg_state, true);
380 fw3_print_default_tail_rules(handle, cfg_state, true);
382 fw3_ipt_commit(handle);
383 fw3_ipt_close(handle);
386 fw3_print_includes(cfg_state, family, true);
388 family_set(run_state, family, true);
389 family_set(cfg_state, family, true);
396 fw3_set_defaults(cfg_state);
397 fw3_run_includes(cfg_state, true);
398 fw3_hotplug_zones(cfg_state, true);
399 fw3_write_statefile(cfg_state);
406 lookup_network(const char *net)
409 struct fw3_device *d;
411 list_for_each_entry(z, &cfg_state->zones, list)
413 list_for_each_entry(d, &z->networks, list)
415 if (!strcmp(d->name, net))
417 printf("%s\n", z->name);
427 lookup_device(const char *dev)
430 struct fw3_device *d;
432 list_for_each_entry(z, &cfg_state->zones, list)
434 list_for_each_entry(d, &z->devices, list)
436 if (!strcmp(d->name, dev))
438 printf("%s\n", z->name);
450 fprintf(stderr, "fw3 [-4] [-6] [-q] print\n");
451 fprintf(stderr, "fw3 [-q] {start|stop|flush|reload|restart}\n");
452 fprintf(stderr, "fw3 [-q] network {net}\n");
453 fprintf(stderr, "fw3 [-q] device {dev}\n");
459 int main(int argc, char **argv)
462 enum fw3_family family = FW3_FAMILY_ANY;
463 struct fw3_defaults *defs = NULL;
465 while ((ch = getopt(argc, argv, "46dqh")) != -1)
470 family = FW3_FAMILY_V4;
474 family = FW3_FAMILY_V6;
482 freopen("/dev/null", "w", stderr);
493 defs = &cfg_state->defaults;
501 if (!strcmp(argv[optind], "print"))
503 if (family == FW3_FAMILY_ANY)
505 family = FW3_FAMILY_V4;
507 else if (family == FW3_FAMILY_V6)
509 if (defs->disable_ipv6)
510 warn("IPv6 rules globally disabled in configuration");
513 warn("IPv6 support is not compiled in");
517 freopen("/dev/null", "w", stderr);
519 cfg_state->disable_ipsets = true;
520 print_family = family;
525 else if (!strcmp(argv[optind], "start"))
533 else if (!strcmp(argv[optind], "stop"))
541 else if (!strcmp(argv[optind], "flush"))
549 else if (!strcmp(argv[optind], "restart"))
558 else if (!strcmp(argv[optind], "reload"))
566 else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
568 rv = lookup_network(argv[optind + 1]);
570 else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
572 rv = lookup_device(argv[optind + 1]);
581 free_state(cfg_state);
584 free_state(run_state);