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;
35 static struct fw3_state *run_state = NULL;
36 static struct fw3_state *cfg_state = NULL;
40 build_state(bool runtime)
42 struct fw3_state *state = NULL;
43 struct uci_package *p = NULL;
46 state = malloc(sizeof(*state));
49 error("Out of memory");
51 memset(state, 0, sizeof(*state));
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;
99 fw3_load_defaults(state, p);
100 fw3_load_ipsets(state, p);
101 fw3_load_zones(state, p);
102 fw3_load_rules(state, p);
103 fw3_load_redirects(state, p);
104 fw3_load_forwards(state, p);
105 fw3_load_includes(state, p);
111 free_state(struct fw3_state *state)
113 struct list_head *cur, *tmp;
115 list_for_each_safe(cur, tmp, &state->zones)
116 fw3_free_zone((struct fw3_zone *)cur);
118 list_for_each_safe(cur, tmp, &state->rules)
119 fw3_free_rule((struct fw3_rule *)cur);
121 list_for_each_safe(cur, tmp, &state->redirects)
122 fw3_free_redirect((struct fw3_redirect *)cur);
124 list_for_each_safe(cur, tmp, &state->forwards)
125 fw3_free_forward((struct fw3_forward *)cur);
127 list_for_each_safe(cur, tmp, &state->ipsets)
128 fw3_free_ipset((struct fw3_ipset *)cur);
130 list_for_each_safe(cur, tmp, &state->includes)
131 fw3_free_include((struct fw3_include *)cur);
133 uci_free_context(state->uci);
137 fw3_ubus_disconnect();
142 restore_pipe(enum fw3_family family, bool silent)
146 cmd = (family == FW3_FAMILY_V4) ? "iptables-restore" : "ip6tables-restore";
149 return fw3_stdout_pipe();
151 if (!fw3_command_pipe(silent, cmd, "--lenient", "--noflush"))
153 warn("Unable to execute %s", cmd);
161 family_running(enum fw3_family family)
163 return (run_state && has(run_state->defaults.flags, family, family));
167 family_set(struct fw3_state *state, enum fw3_family family, bool set)
173 set(state->defaults.flags, family, family);
175 del(state->defaults.flags, family, family);
179 stop(bool complete, bool reload)
184 enum fw3_family family;
185 enum fw3_table table;
187 if (!complete && !run_state)
190 warn("The firewall appears to be stopped. "
191 "Use the 'flush' command to forcefully purge all rules.");
196 if (!print_rules && run_state)
197 fw3_hotplug_zones(run_state, false);
199 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
201 if (!complete && !family_running(family))
204 if (!restore_pipe(family, true))
207 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
209 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
212 info(" * %sing %s %s table", complete ? "Flush" : "Clear",
213 fw3_flag_names[family], fw3_flag_names[table]);
215 fw3_pr("*%s\n", fw3_flag_names[table]);
219 fw3_flush_all(table);
224 fw3_flush_rules(run_state, family, table, reload, false);
225 fw3_flush_zones(run_state, family, table, reload, false);
228 fw3_flush_rules(run_state, family, table, reload, true);
229 fw3_flush_zones(run_state, family, table, reload, true);
237 if (!reload && run_state)
239 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
241 fw3_destroy_ipsets(run_state, family);
245 family_set(run_state, family, false);
246 family_set(cfg_state, family, false);
252 if (complete && (ct = fopen("/proc/net/nf_conntrack", "w")) != NULL)
254 info(" * Flushing conntrack table ...");
256 fwrite("f\n", 2, 1, ct);
260 if (!rv && run_state)
261 fw3_write_statefile(run_state);
270 enum fw3_family family;
271 enum fw3_table table;
273 if (!print_rules && !reload)
275 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
277 fw3_create_ipsets(cfg_state);
282 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
284 if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
287 if (!print_rules && !reload && family_running(family))
289 warn("The %s firewall appears to be started already. "
290 "If it is indeed empty, remove the %s file and retry.",
291 fw3_flag_names[family], FW3_STATEFILE);
296 if (!restore_pipe(family, false))
299 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
301 if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
304 info(" * Populating %s %s table",
305 fw3_flag_names[family], fw3_flag_names[table]);
307 fw3_pr("*%s\n", fw3_flag_names[table]);
308 fw3_print_default_chains(cfg_state, family, table, reload);
309 fw3_print_zone_chains(cfg_state, family, table, reload);
310 fw3_print_default_head_rules(cfg_state, family, table, reload);
311 fw3_print_rules(cfg_state, family, table);
312 fw3_print_redirects(cfg_state, family, table);
313 fw3_print_forwards(cfg_state, family, table);
314 fw3_print_zone_rules(cfg_state, family, table, reload);
315 fw3_print_default_tail_rules(cfg_state, family, table, reload);
319 fw3_print_includes(cfg_state, family, reload);
322 family_set(run_state, family, true);
323 family_set(cfg_state, family, true);
330 fw3_set_defaults(cfg_state);
334 fw3_run_includes(cfg_state, reload);
335 fw3_hotplug_zones(cfg_state, true);
336 fw3_write_statefile(cfg_state);
344 lookup_network(const char *net)
347 struct fw3_device *d;
349 list_for_each_entry(z, &cfg_state->zones, list)
351 list_for_each_entry(d, &z->networks, list)
353 if (!strcmp(d->name, net))
355 printf("%s\n", z->name);
365 lookup_device(const char *dev)
368 struct fw3_device *d;
370 list_for_each_entry(z, &cfg_state->zones, list)
372 list_for_each_entry(d, &z->devices, list)
374 if (!strcmp(d->name, dev))
376 printf("%s\n", z->name);
388 fprintf(stderr, "fw3 [-4] [-6] [-q] print\n");
389 fprintf(stderr, "fw3 [-q] {start|stop|flush|reload|restart}\n");
390 fprintf(stderr, "fw3 [-q] network {net}\n");
391 fprintf(stderr, "fw3 [-q] device {dev}\n");
397 int main(int argc, char **argv)
400 struct fw3_defaults *defs = NULL;
401 enum fw3_family use_family = FW3_FAMILY_ANY;
403 while ((ch = getopt(argc, argv, "46dqh")) != -1)
408 use_family = FW3_FAMILY_V4;
412 use_family = FW3_FAMILY_V6;
420 freopen("/dev/null", "w", stderr);
431 defs = &cfg_state->defaults;
439 if (!strcmp(argv[optind], "print"))
441 if (use_family == FW3_FAMILY_ANY)
442 use_family = FW3_FAMILY_V4;
443 else if (use_family == FW3_FAMILY_V6 && defs->disable_ipv6)
444 warn("IPv6 rules globally disabled in configuration");
446 freopen("/dev/null", "w", stderr);
448 cfg_state->disable_ipsets = true;
453 else if (!strcmp(argv[optind], "start"))
461 else if (!strcmp(argv[optind], "stop"))
465 rv = stop(false, false);
469 else if (!strcmp(argv[optind], "flush"))
473 rv = stop(true, false);
477 else if (!strcmp(argv[optind], "restart"))
487 else if (!strcmp(argv[optind], "reload"))
491 rv = stop(false, true);
497 else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
499 rv = lookup_network(argv[optind + 1]);
501 else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
503 rv = lookup_device(argv[optind + 1]);
512 free_state(cfg_state);
515 free_state(run_state);