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"
33 static bool print_rules = false;
34 static enum fw3_family use_family = FW3_FAMILY_ANY;
37 static struct fw3_state *
40 struct fw3_state *state = NULL;
41 struct uci_package *p = NULL;
43 state = malloc(sizeof(*state));
46 error("Out of memory");
48 memset(state, 0, sizeof(*state));
49 state->uci = uci_alloc_context();
52 error("Out of memory");
54 if (uci_load(state->uci, "firewall", &p))
56 uci_perror(state->uci, NULL);
57 error("Failed to load /etc/config/firewall");
60 if (!fw3_find_command("ipset"))
62 warn("Unable to locate ipset utility, disabling ipset support");
63 state->disable_ipsets = true;
66 INIT_LIST_HEAD(&state->running_zones);
67 INIT_LIST_HEAD(&state->running_ipsets);
69 fw3_load_defaults(state, p);
70 fw3_load_ipsets(state, p);
71 fw3_load_zones(state, p);
72 fw3_load_rules(state, p);
73 fw3_load_redirects(state, p);
74 fw3_load_forwards(state, p);
75 fw3_load_includes(state, p);
77 state->statefile = fw3_read_statefile(state);
83 free_state(struct fw3_state *state)
85 struct list_head *cur, *tmp;
87 list_for_each_safe(cur, tmp, &state->zones)
88 fw3_free_zone((struct fw3_zone *)cur);
90 list_for_each_safe(cur, tmp, &state->rules)
91 fw3_free_rule((struct fw3_rule *)cur);
93 list_for_each_safe(cur, tmp, &state->redirects)
94 fw3_free_redirect((struct fw3_redirect *)cur);
96 list_for_each_safe(cur, tmp, &state->forwards)
97 fw3_free_forward((struct fw3_forward *)cur);
99 list_for_each_safe(cur, tmp, &state->ipsets)
100 fw3_free_ipset((struct fw3_ipset *)cur);
102 list_for_each_safe(cur, tmp, &state->includes)
103 fw3_free_include((struct fw3_include *)cur);
105 uci_free_context(state->uci);
109 fw3_ubus_disconnect();
114 restore_pipe(enum fw3_family family, bool silent)
118 cmd = (family == FW3_FAMILY_V4) ? "iptables-restore" : "ip6tables-restore";
121 return fw3_stdout_pipe();
123 if (!fw3_command_pipe(silent, cmd, "--lenient", "--noflush"))
125 warn("Unable to execute %s", cmd);
133 family_running(struct fw3_state *state, enum fw3_family family)
135 return hasbit(state->running_defaults.flags, family);
139 family_used(enum fw3_family family)
141 return (use_family == FW3_FAMILY_ANY) || (use_family == family);
145 family_loaded(struct fw3_state *state, enum fw3_family family)
147 return hasbit(state->defaults.flags, family);
151 family_set(struct fw3_state *state, enum fw3_family family, bool set)
154 setbit(state->defaults.flags, family);
156 delbit(state->defaults.flags, family);
160 stop(struct fw3_state *state, bool complete, bool restart)
163 enum fw3_family family;
164 enum fw3_table table;
166 if (!complete && !state->statefile)
169 warn("The firewall appears to be stopped. "
170 "Use the 'flush' command to forcefully purge all rules.");
175 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
177 if (!complete && !family_running(state, family))
180 if (!family_used(family) || !restore_pipe(family, true))
183 info("Removing %s rules ...", fw3_flag_names[family]);
185 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
187 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
190 info(" * %sing %s table",
191 complete ? "Flush" : "Clear", fw3_flag_names[table]);
193 fw3_pr("*%s\n", fw3_flag_names[table]);
197 fw3_flush_all(table);
202 fw3_flush_rules(table, family, false, state);
203 fw3_flush_zones(table, family, false, state);
206 fw3_flush_rules(table, family, true, state);
207 fw3_flush_zones(table, family, true, state);
216 family_set(state, family, false);
221 if (!restart && fw3_command_pipe(false, "ipset", "-exist", "-"))
223 fw3_destroy_ipsets(state);
228 fw3_write_statefile(state);
234 start(struct fw3_state *state, bool restart)
237 enum fw3_family family;
238 enum fw3_table table;
240 if (!print_rules && !restart &&
241 fw3_command_pipe(false, "ipset", "-exist", "-"))
243 fw3_create_ipsets(state);
247 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
249 if (!family_used(family))
252 if (!print_rules && !restart && family_running(state, family))
254 warn("The %s firewall appears to be started already. "
255 "If it is indeed empty, remove the %s file and retry.",
256 fw3_flag_names[family], FW3_STATEFILE);
261 if (!family_loaded(state, family) || !restore_pipe(family, false))
264 info("Constructing %s rules ...", fw3_flag_names[family]);
266 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
268 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
271 info(" * Populating %s table", fw3_flag_names[table]);
273 fw3_pr("*%s\n", fw3_flag_names[table]);
274 fw3_print_default_chains(table, family, state);
275 fw3_print_zone_chains(table, family, state);
276 fw3_print_default_head_rules(table, family, state);
277 fw3_print_rules(table, family, state);
278 fw3_print_redirects(table, family, state);
279 fw3_print_forwards(table, family, state);
280 fw3_print_zone_rules(table, family, state);
281 fw3_print_default_tail_rules(table, family, state);
286 family_set(state, family, true);
291 if (!rv && !print_rules)
292 fw3_write_statefile(state);
298 lookup_network(struct fw3_state *state, const char *net)
301 struct fw3_device *d;
303 list_for_each_entry(z, &state->zones, list)
305 list_for_each_entry(d, &z->networks, list)
307 if (!strcmp(d->name, net))
309 printf("%s\n", z->name);
319 lookup_device(struct fw3_state *state, const char *dev)
322 struct fw3_device *d;
324 list_for_each_entry(z, &state->zones, list)
326 list_for_each_entry(d, &z->devices, list)
328 if (!strcmp(d->name, dev))
330 printf("%s\n", z->name);
342 fprintf(stderr, "fw3 [-4] [-6] [-q] {start|stop|flush|restart|print}\n");
343 fprintf(stderr, "fw3 [-q] network {net}\n");
344 fprintf(stderr, "fw3 [-q] device {dev}\n");
350 int main(int argc, char **argv)
353 struct fw3_state *state = NULL;
354 struct fw3_defaults *defs = NULL;
356 while ((ch = getopt(argc, argv, "46qh")) != -1)
361 use_family = FW3_FAMILY_V4;
365 use_family = FW3_FAMILY_V6;
369 freopen("/dev/null", "w", stderr);
378 if (!fw3_ubus_connect())
379 error("Failed to connect to ubus");
381 state = build_state();
382 defs = &state->defaults;
393 if (use_family == FW3_FAMILY_V6 && defs->disable_ipv6)
394 warn("IPv6 rules globally disabled in configuration");
396 if (!strcmp(argv[optind], "print"))
398 if (use_family == FW3_FAMILY_ANY)
399 use_family = FW3_FAMILY_V4;
401 freopen("/dev/null", "w", stderr);
403 state->disable_ipsets = true;
406 rv = start(state, false);
408 else if (!strcmp(argv[optind], "start"))
410 rv = start(state, false);
412 else if (!strcmp(argv[optind], "stop"))
414 rv = stop(state, false, false);
416 else if (!strcmp(argv[optind], "flush"))
418 rv = stop(state, true, false);
420 else if (!strcmp(argv[optind], "restart"))
422 rv = stop(state, false, true);
423 rv = start(state, !rv);
425 else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
427 rv = lookup_network(state, argv[optind + 1]);
429 else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
431 rv = lookup_device(state, argv[optind + 1]);