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
);