2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013-2014 Jo-Philipp Wich <jo@mein.io>
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"
36 static enum fw3_family print_family
= FW3_FAMILY_ANY
;
38 static struct fw3_state
*run_state
= NULL
;
39 static struct fw3_state
*cfg_state
= NULL
;
43 build_state(bool runtime
)
45 struct fw3_state
*state
= NULL
;
46 struct uci_package
*p
= NULL
;
49 state
= calloc(1, sizeof(*state
));
51 error("Out of memory");
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 warn("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;
101 struct blob_buf b
= {NULL
, NULL
, 0, NULL
};
104 fw3_load_defaults(state
, p
);
105 fw3_load_cthelpers(state
, p
);
106 fw3_load_ipsets(state
, p
, b
.head
);
107 fw3_load_zones(state
, p
);
108 fw3_load_rules(state
, p
, b
.head
);
109 fw3_load_redirects(state
, p
, b
.head
);
110 fw3_load_snats(state
, p
, b
.head
);
111 fw3_load_forwards(state
, p
, b
.head
);
112 fw3_load_includes(state
, p
, b
.head
);
118 free_state(struct fw3_state
*state
)
120 struct list_head
*cur
, *tmp
;
122 list_for_each_safe(cur
, tmp
, &state
->zones
)
123 fw3_free_zone((struct fw3_zone
*)cur
);
125 list_for_each_safe(cur
, tmp
, &state
->rules
)
126 fw3_free_rule((struct fw3_rule
*)cur
);
128 list_for_each_safe(cur
, tmp
, &state
->redirects
)
129 fw3_free_redirect((struct fw3_redirect
*)cur
);
131 list_for_each_safe(cur
, tmp
, &state
->snats
)
132 fw3_free_snat((struct fw3_snat
*)cur
);
134 list_for_each_safe(cur
, tmp
, &state
->forwards
)
135 fw3_free_forward((struct fw3_forward
*)cur
);
137 list_for_each_safe(cur
, tmp
, &state
->ipsets
)
138 fw3_free_ipset((struct fw3_ipset
*)cur
);
140 list_for_each_safe(cur
, tmp
, &state
->includes
)
141 fw3_free_include((struct fw3_include
*)cur
);
143 list_for_each_safe(cur
, tmp
, &state
->cthelpers
)
144 fw3_free_cthelper((struct fw3_cthelper
*)cur
);
146 uci_free_context(state
->uci
);
150 fw3_ubus_disconnect();
155 family_running(enum fw3_family family
)
157 return (run_state
&& has(run_state
->defaults
.flags
, family
, family
));
161 family_set(struct fw3_state
*state
, enum fw3_family family
, bool set
)
167 set(state
->defaults
.flags
, family
, family
);
169 del(state
->defaults
.flags
, family
, family
);
176 enum fw3_family family
;
177 enum fw3_table table
;
178 struct fw3_ipt_handle
*handle
;
180 if (!complete
&& !run_state
)
182 warn("The firewall appears to be stopped. "
183 "Use the 'flush' command to forcefully purge all rules.");
188 if (!print_family
&& run_state
)
189 fw3_hotplug_zones(run_state
, false);
191 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
193 if (!complete
&& !family_running(family
))
196 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
198 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
201 if (!(handle
= fw3_ipt_open(family
, table
)))
204 info(" * %sing %s %s table", complete
? "Flush" : "Clear",
205 fw3_flag_names
[family
], fw3_flag_names
[table
]);
209 fw3_flush_all(handle
);
213 fw3_flush_rules(handle
, run_state
, false);
214 fw3_flush_zones(handle
, run_state
, false);
217 fw3_ipt_commit(handle
);
218 fw3_ipt_close(handle
);
221 family_set(run_state
, family
, false);
222 family_set(cfg_state
, family
, false);
228 fw3_destroy_ipsets(run_state
);
231 fw3_flush_conntrack(NULL
);
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_flush_conntrack(run_state
);
306 fw3_set_defaults(cfg_state
);
310 fw3_run_includes(cfg_state
, false);
311 fw3_hotplug_zones(cfg_state
, true);
312 fw3_write_statefile(cfg_state
);
324 enum fw3_family family
;
325 enum fw3_table table
;
326 struct fw3_ipt_handle
*handle
;
331 fw3_hotplug_zones(run_state
, false);
333 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
335 if (!family_running(family
))
338 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
340 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
343 if (!(handle
= fw3_ipt_open(family
, table
)))
346 info(" * Clearing %s %s table",
347 fw3_flag_names
[family
], fw3_flag_names
[table
]);
349 fw3_flush_rules(handle
, run_state
, true);
350 fw3_flush_zones(handle
, run_state
, true);
351 fw3_ipt_commit(handle
);
352 fw3_ipt_close(handle
);
355 family_set(run_state
, family
, false);
356 family_set(cfg_state
, family
, false);
359 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
362 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
364 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
367 if (!(handle
= fw3_ipt_open(family
, table
)))
370 info(" * Populating %s %s table",
371 fw3_flag_names
[family
], fw3_flag_names
[table
]);
373 fw3_print_default_chains(handle
, cfg_state
, true);
374 fw3_print_zone_chains(handle
, cfg_state
, true);
375 fw3_print_default_head_rules(handle
, cfg_state
, true);
376 fw3_print_rules(handle
, cfg_state
);
377 fw3_print_redirects(handle
, cfg_state
);
378 fw3_print_snats(handle
, cfg_state
);
379 fw3_print_forwards(handle
, cfg_state
);
380 fw3_print_zone_rules(handle
, cfg_state
, true);
381 fw3_print_default_tail_rules(handle
, cfg_state
, true);
383 fw3_ipt_commit(handle
);
384 fw3_ipt_close(handle
);
387 fw3_print_includes(cfg_state
, family
, true);
389 family_set(run_state
, family
, true);
390 family_set(cfg_state
, family
, true);
397 fw3_flush_conntrack(run_state
);
399 fw3_set_defaults(cfg_state
);
400 fw3_run_includes(cfg_state
, true);
401 fw3_hotplug_zones(cfg_state
, true);
402 fw3_write_statefile(cfg_state
);
411 enum fw3_family family
;
412 enum fw3_table table
;
413 struct fw3_ipt_handle
*handle
;
415 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
417 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
420 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
422 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
425 if (!(handle
= fw3_ipt_open(family
, table
)))
429 fw3_ipt_commit(handle
);
430 fw3_ipt_close(handle
);
438 lookup_network(const char *net
)
441 struct fw3_device
*d
;
443 list_for_each_entry(z
, &cfg_state
->zones
, list
)
445 list_for_each_entry(d
, &z
->networks
, list
)
447 if (!strcmp(d
->name
, net
))
449 printf("%s\n", z
->name
);
459 lookup_device(const char *dev
)
462 struct fw3_device
*d
;
464 list_for_each_entry(z
, &cfg_state
->zones
, list
)
466 list_for_each_entry(d
, &z
->devices
, list
)
468 if (!strcmp(d
->name
, dev
))
470 printf("%s\n", z
->name
);
480 lookup_zone(const char *zone
, const char *device
)
483 struct fw3_device
*d
;
485 list_for_each_entry(z
, &cfg_state
->zones
, list
)
487 if (strcmp(z
->name
, zone
))
490 list_for_each_entry(d
, &z
->devices
, list
)
492 if (device
&& strcmp(device
, d
->name
))
495 printf("%s\n", d
->name
);
511 fprintf(stderr
, "fw3 [-4] [-6] [-q] print\n");
512 fprintf(stderr
, "fw3 [-q] {start|stop|flush|reload|restart}\n");
513 fprintf(stderr
, "fw3 [-q] network {net}\n");
514 fprintf(stderr
, "fw3 [-q] device {dev}\n");
515 fprintf(stderr
, "fw3 [-q] zone {zone} [dev]\n");
521 int main(int argc
, char **argv
)
524 enum fw3_family family
= FW3_FAMILY_ANY
;
525 struct fw3_defaults
*defs
= NULL
;
527 while ((ch
= getopt(argc
, argv
, "46dqh")) != -1)
532 family
= FW3_FAMILY_V4
;
536 family
= FW3_FAMILY_V6
;
544 if (freopen("/dev/null", "w", stderr
)) {}
554 defs
= &cfg_state
->defaults
;
562 if (!strcmp(argv
[optind
], "print"))
564 if (family
== FW3_FAMILY_ANY
)
566 family
= FW3_FAMILY_V4
;
568 else if (family
== FW3_FAMILY_V6
)
570 if (defs
->disable_ipv6
)
571 warn("IPv6 rules globally disabled in configuration");
574 warn("IPv6 support is not compiled in");
578 if (freopen("/dev/null", "w", stderr
)) {};
580 cfg_state
->disable_ipsets
= true;
581 print_family
= family
;
591 else if (!strcmp(argv
[optind
], "start"))
600 else if (!strcmp(argv
[optind
], "stop"))
609 else if (!strcmp(argv
[optind
], "flush"))
618 else if (!strcmp(argv
[optind
], "restart"))
628 else if (!strcmp(argv
[optind
], "reload"))
637 else if (!strcmp(argv
[optind
], "gc"))
645 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
647 rv
= lookup_network(argv
[optind
+ 1]);
649 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
651 rv
= lookup_device(argv
[optind
+ 1]);
653 else if (!strcmp(argv
[optind
], "zone") && (optind
+ 1) < argc
)
655 rv
= lookup_zone(argv
[optind
+ 1], argv
[optind
+ 2]);
664 free_state(cfg_state
);
667 free_state(run_state
);