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
);