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.
26 #include "redirects.h"
34 static bool print_rules = false;
36 static struct fw3_state *run_state = NULL;
37 static struct fw3_state *cfg_state = NULL;
41 build_state(bool runtime)
43 struct fw3_state *state = NULL;
44 struct uci_package *p = NULL;
47 state = malloc(sizeof(*state));
50 error("Out of memory");
52 memset(state, 0, sizeof(*state));
53 state->uci = uci_alloc_context();
56 error("Out of memory");
60 sf = fopen(FW3_STATEFILE, "r");
64 uci_import(state->uci, sf, "fw3_state", &p, true);
70 uci_free_context(state->uci);
76 state->statefile = true;
82 if (!fw3_ubus_connect())
83 error("Failed to connect to ubus");
85 if (uci_load(state->uci, "firewall", &p))
87 uci_perror(state->uci, NULL);
88 error("Failed to load /etc/config/firewall");
91 if (!fw3_find_command("ipset"))
93 warn("Unable to locate ipset utility, disabling ipset support");
94 state->disable_ipsets = true;
100 fw3_load_defaults(state, p);
101 fw3_load_ipsets(state, p);
102 fw3_load_zones(state, p);
103 fw3_load_rules(state, p);
104 fw3_load_redirects(state, p);
105 fw3_load_forwards(state, p);
106 fw3_load_includes(state, p);
112 free_state(struct fw3_state *state)
114 struct list_head *cur, *tmp;
116 list_for_each_safe(cur, tmp, &state->zones)
117 fw3_free_zone((struct fw3_zone *)cur);
119 list_for_each_safe(cur, tmp, &state->rules)
120 fw3_free_rule((struct fw3_rule *)cur);
122 list_for_each_safe(cur, tmp, &state->redirects)
123 fw3_free_redirect((struct fw3_redirect *)cur);
125 list_for_each_safe(cur, tmp, &state->forwards)
126 fw3_free_forward((struct fw3_forward *)cur);
128 list_for_each_safe(cur, tmp, &state->ipsets)
129 fw3_free_ipset((struct fw3_ipset *)cur);
131 list_for_each_safe(cur, tmp, &state->includes)
132 fw3_free_include((struct fw3_include *)cur);
134 uci_free_context(state->uci);
138 fw3_ubus_disconnect();
143 restore_pipe(enum fw3_family family, bool silent)
147 cmd = (family == FW3_FAMILY_V4) ? "iptables-restore" : "ip6tables-restore";
150 return fw3_stdout_pipe();
152 if (!fw3_command_pipe(silent, cmd, "--lenient", "--noflush"))
154 warn("Unable to execute %s", cmd);
162 family_running(enum fw3_family family)
164 return (run_state && has(run_state->defaults.flags, family, family));
168 family_set(struct fw3_state *state, enum fw3_family family, bool set)
174 set(state->defaults.flags, family, family);
176 del(state->defaults.flags, family, family);
185 enum fw3_family family;
186 enum fw3_table table;
187 struct fw3_ipt_handle *handle;
189 if (!complete && !run_state)
191 warn("The firewall appears to be stopped. "
192 "Use the 'flush' command to forcefully purge all rules.");
197 if (!print_rules && run_state)
198 fw3_hotplug_zones(run_state, false);
200 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
202 if (!complete && !family_running(family))
205 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
207 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
210 if (!(handle = fw3_ipt_open(family, table)))
213 info(" * %sing %s %s table", complete ? "Flush" : "Clear",
214 fw3_flag_names[family], fw3_flag_names[table]);
218 fw3_flush_all(handle);
222 fw3_flush_rules(handle, run_state, false);
223 fw3_flush_zones(handle, run_state, false);
226 fw3_ipt_commit(handle);
229 family_set(run_state, family, false);
230 family_set(cfg_state, family, false);
237 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
239 fw3_destroy_ipsets(run_state);
244 if (complete && (ct = fopen("/proc/net/nf_conntrack", "w")) != NULL)
246 info(" * Flushing conntrack table ...");
248 fwrite("f\n", 2, 1, ct);
252 if (!rv && run_state)
253 fw3_write_statefile(run_state);
262 enum fw3_family family;
263 enum fw3_table table;
267 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
269 fw3_create_ipsets(cfg_state);
274 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
276 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
279 if (!print_rules && family_running(family))
281 warn("The %s firewall appears to be started already. "
282 "If it is indeed empty, remove the %s file and retry.",
283 fw3_flag_names[family], FW3_STATEFILE);
288 if (!restore_pipe(family, false))
291 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
293 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
296 info(" * Populating %s %s table",
297 fw3_flag_names[family], fw3_flag_names[table]);
299 fw3_pr("*%s\n", fw3_flag_names[table]);
300 fw3_print_default_chains(cfg_state, family, table, false);
301 fw3_print_zone_chains(cfg_state, family, table, false);
302 fw3_print_default_head_rules(cfg_state, family, table, false);
303 fw3_print_rules(cfg_state, family, table);
304 fw3_print_redirects(cfg_state, family, table);
305 fw3_print_forwards(cfg_state, family, table);
306 fw3_print_zone_rules(cfg_state, family, table, false);
307 fw3_print_default_tail_rules(cfg_state, family, table, false);
311 fw3_print_includes(cfg_state, family, false);
314 family_set(run_state, family, true);
315 family_set(cfg_state, family, true);
322 fw3_set_defaults(cfg_state);
326 fw3_run_includes(cfg_state, false);
327 fw3_hotplug_zones(cfg_state, true);
328 fw3_write_statefile(cfg_state);
340 enum fw3_family family;
341 enum fw3_table table;
342 struct fw3_ipt_handle *handle;
344 if (!print_rules && run_state)
345 fw3_hotplug_zones(run_state, false);
347 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
349 if (!family_running(family))
352 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
354 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
357 if (!(handle = fw3_ipt_open(family, table)))
360 info(" * Clearing %s %s table",
361 fw3_flag_names[family], fw3_flag_names[table]);
365 fw3_flush_rules(handle, run_state, true);
366 fw3_flush_zones(handle, run_state, true);
369 fw3_ipt_commit(handle);
372 family_set(run_state, family, false);
373 family_set(cfg_state, family, false);
376 if (!restore_pipe(family, true))
379 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
382 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
384 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
387 info(" * Populating %s %s table",
388 fw3_flag_names[family], fw3_flag_names[table]);
390 fw3_pr("*%s\n", fw3_flag_names[table]);
391 fw3_print_default_chains(cfg_state, family, table, true);
392 fw3_print_zone_chains(cfg_state, family, table, true);
393 fw3_print_default_head_rules(cfg_state, family, table, true);
394 fw3_print_rules(cfg_state, family, table);
395 fw3_print_redirects(cfg_state, family, table);
396 fw3_print_forwards(cfg_state, family, table);
397 fw3_print_zone_rules(cfg_state, family, table, true);
398 fw3_print_default_tail_rules(cfg_state, family, table, true);
402 fw3_print_includes(cfg_state, family, true);
404 family_set(run_state, family, true);
405 family_set(cfg_state, family, true);
415 fw3_set_defaults(cfg_state);
419 fw3_run_includes(cfg_state, true);
420 fw3_hotplug_zones(cfg_state, true);
421 fw3_write_statefile(cfg_state);
429 lookup_network(const char *net)
432 struct fw3_device *d;
434 list_for_each_entry(z, &cfg_state->zones, list)
436 list_for_each_entry(d, &z->networks, list)
438 if (!strcmp(d->name, net))
440 printf("%s\n", z->name);
450 lookup_device(const char *dev)
453 struct fw3_device *d;
455 list_for_each_entry(z, &cfg_state->zones, list)
457 list_for_each_entry(d, &z->devices, list)
459 if (!strcmp(d->name, dev))
461 printf("%s\n", z->name);
473 fprintf(stderr, "fw3 [-4] [-6] [-q] print\n");
474 fprintf(stderr, "fw3 [-q] {start|stop|flush|reload|restart}\n");
475 fprintf(stderr, "fw3 [-q] network {net}\n");
476 fprintf(stderr, "fw3 [-q] device {dev}\n");
482 int main(int argc, char **argv)
485 struct fw3_defaults *defs = NULL;
486 enum fw3_family use_family = FW3_FAMILY_ANY;
488 while ((ch = getopt(argc, argv, "46dqh")) != -1)
493 use_family = FW3_FAMILY_V4;
497 use_family = FW3_FAMILY_V6;
505 freopen("/dev/null", "w", stderr);
516 defs = &cfg_state->defaults;
524 if (!strcmp(argv[optind], "print"))
526 if (use_family == FW3_FAMILY_ANY)
527 use_family = FW3_FAMILY_V4;
528 else if (use_family == FW3_FAMILY_V6 && defs->disable_ipv6)
529 warn("IPv6 rules globally disabled in configuration");
531 freopen("/dev/null", "w", stderr);
533 cfg_state->disable_ipsets = true;
538 else if (!strcmp(argv[optind], "start"))
546 else if (!strcmp(argv[optind], "stop"))
554 else if (!strcmp(argv[optind], "flush"))
562 else if (!strcmp(argv[optind], "restart"))
571 else if (!strcmp(argv[optind], "reload"))
579 else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
581 rv = lookup_network(argv[optind + 1]);
583 else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
585 rv = lookup_device(argv[optind + 1]);
594 free_state(cfg_state);
597 free_state(run_state);