9afeb701edf1b1c3564dcea82da8e9ad248382a2
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 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
229 fw3_destroy_ipsets(run_state
, family
, false);
233 fw3_flush_conntrack(NULL
);
235 if (!rv
&& run_state
)
236 fw3_write_statefile(run_state
);
245 enum fw3_family family
;
246 enum fw3_table table
;
247 struct fw3_ipt_handle
*handle
;
249 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
252 fw3_create_ipsets(cfg_state
, family
, false);
254 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
257 if (print_family
&& family
!= print_family
)
260 if (!print_family
&& family_running(family
))
262 warn("The %s firewall appears to be started already. "
263 "If it is indeed empty, remove the %s file and retry.",
264 fw3_flag_names
[family
], FW3_STATEFILE
);
269 /* Linux 5.15+: make sure the tables are loaded and
270 * /proc/net/ip{,6}_tables_names are thus populated.
272 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
274 if (!(handle
= fw3_ipt_open(family
, table
)))
277 fw3_ipt_close(handle
);
280 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
282 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
285 if (!(handle
= fw3_ipt_open(family
, table
)))
288 info(" * Populating %s %s table",
289 fw3_flag_names
[family
], fw3_flag_names
[table
]);
291 fw3_print_default_chains(handle
, cfg_state
, false);
292 fw3_print_zone_chains(handle
, cfg_state
, false);
293 fw3_print_default_head_rules(handle
, cfg_state
, false);
294 fw3_print_rules(handle
, cfg_state
);
295 fw3_print_redirects(handle
, cfg_state
);
296 fw3_print_snats(handle
, cfg_state
);
297 fw3_print_forwards(handle
, cfg_state
);
298 fw3_print_zone_rules(handle
, cfg_state
, false);
299 fw3_print_default_tail_rules(handle
, cfg_state
, false);
302 fw3_ipt_commit(handle
);
304 fw3_ipt_close(handle
);
308 fw3_print_includes(cfg_state
, family
, false);
310 family_set(run_state
, family
, true);
311 family_set(cfg_state
, family
, true);
318 fw3_flush_conntrack(run_state
);
319 fw3_set_defaults(cfg_state
);
323 fw3_run_includes(cfg_state
, false);
324 fw3_hotplug_zones(cfg_state
, true);
325 fw3_write_statefile(cfg_state
);
337 enum fw3_family family
;
338 enum fw3_table table
;
339 struct fw3_ipt_handle
*handle
;
344 fw3_hotplug_zones(run_state
, false);
346 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
348 if (!family_running(family
))
351 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
353 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
356 if (!(handle
= fw3_ipt_open(family
, table
)))
359 info(" * Clearing %s %s table",
360 fw3_flag_names
[family
], fw3_flag_names
[table
]);
362 fw3_flush_rules(handle
, run_state
, true);
363 fw3_flush_zones(handle
, run_state
, true);
364 fw3_ipt_commit(handle
);
365 fw3_ipt_close(handle
);
368 fw3_ipsets_update_run_state(family
, run_state
, cfg_state
);
369 fw3_destroy_ipsets(run_state
, family
, true);
371 family_set(run_state
, family
, false);
372 family_set(cfg_state
, family
, false);
375 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
378 fw3_create_ipsets(cfg_state
, family
, true);
380 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
382 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
385 if (!(handle
= fw3_ipt_open(family
, table
)))
388 info(" * Populating %s %s table",
389 fw3_flag_names
[family
], fw3_flag_names
[table
]);
391 fw3_print_default_chains(handle
, cfg_state
, true);
392 fw3_print_zone_chains(handle
, cfg_state
, true);
393 fw3_print_default_head_rules(handle
, cfg_state
, true);
394 fw3_print_rules(handle
, cfg_state
);
395 fw3_print_redirects(handle
, cfg_state
);
396 fw3_print_snats(handle
, cfg_state
);
397 fw3_print_forwards(handle
, cfg_state
);
398 fw3_print_zone_rules(handle
, cfg_state
, true);
399 fw3_print_default_tail_rules(handle
, cfg_state
, true);
401 fw3_ipt_commit(handle
);
402 fw3_ipt_close(handle
);
405 fw3_print_includes(cfg_state
, family
, true);
407 family_set(run_state
, family
, true);
408 family_set(cfg_state
, family
, true);
415 fw3_flush_conntrack(run_state
);
417 fw3_set_defaults(cfg_state
);
418 fw3_run_includes(cfg_state
, true);
419 fw3_hotplug_zones(cfg_state
, true);
420 fw3_write_statefile(cfg_state
);
429 enum fw3_family family
;
430 enum fw3_table table
;
431 struct fw3_ipt_handle
*handle
;
433 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
435 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
438 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
440 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
443 if (!(handle
= fw3_ipt_open(family
, table
)))
447 fw3_ipt_commit(handle
);
448 fw3_ipt_close(handle
);
456 lookup_network(const char *net
)
459 struct fw3_device
*d
;
461 list_for_each_entry(z
, &cfg_state
->zones
, list
)
463 list_for_each_entry(d
, &z
->networks
, list
)
465 if (!strcmp(d
->name
, net
))
467 printf("%s\n", z
->name
);
477 lookup_device(const char *dev
)
480 struct fw3_device
*d
;
482 list_for_each_entry(z
, &cfg_state
->zones
, list
)
484 list_for_each_entry(d
, &z
->devices
, list
)
486 if (!strcmp(d
->name
, dev
))
488 printf("%s\n", z
->name
);
498 lookup_zone(const char *zone
, const char *device
)
501 struct fw3_device
*d
;
503 list_for_each_entry(z
, &cfg_state
->zones
, list
)
505 if (strcmp(z
->name
, zone
))
508 list_for_each_entry(d
, &z
->devices
, list
)
510 if (device
&& strcmp(device
, d
->name
))
513 printf("%s\n", d
->name
);
529 fprintf(stderr
, "fw3 [-4] [-6] [-q] print\n");
530 fprintf(stderr
, "fw3 [-q] {start|stop|flush|reload|restart}\n");
531 fprintf(stderr
, "fw3 [-q] network {net}\n");
532 fprintf(stderr
, "fw3 [-q] device {dev}\n");
533 fprintf(stderr
, "fw3 [-q] zone {zone} [dev]\n");
539 int main(int argc
, char **argv
)
542 enum fw3_family family
= FW3_FAMILY_ANY
;
543 struct fw3_defaults
*defs
= NULL
;
545 while ((ch
= getopt(argc
, argv
, "46dqh")) != -1)
550 family
= FW3_FAMILY_V4
;
554 family
= FW3_FAMILY_V6
;
562 if (freopen("/dev/null", "w", stderr
)) {}
572 defs
= &cfg_state
->defaults
;
580 if (!strcmp(argv
[optind
], "print"))
582 if (family
== FW3_FAMILY_ANY
)
584 family
= FW3_FAMILY_V4
;
586 else if (family
== FW3_FAMILY_V6
)
588 if (defs
->disable_ipv6
)
589 warn("IPv6 rules globally disabled in configuration");
592 warn("IPv6 support is not compiled in");
596 if (freopen("/dev/null", "w", stderr
)) {};
598 cfg_state
->disable_ipsets
= true;
599 print_family
= family
;
609 else if (!strcmp(argv
[optind
], "start"))
618 else if (!strcmp(argv
[optind
], "stop"))
627 else if (!strcmp(argv
[optind
], "flush"))
636 else if (!strcmp(argv
[optind
], "restart"))
646 else if (!strcmp(argv
[optind
], "reload"))
655 else if (!strcmp(argv
[optind
], "gc"))
663 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
665 rv
= lookup_network(argv
[optind
+ 1]);
667 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
669 rv
= lookup_device(argv
[optind
+ 1]);
671 else if (!strcmp(argv
[optind
], "zone") && (optind
+ 1) < argc
)
673 rv
= lookup_zone(argv
[optind
+ 1], argv
[optind
+ 2]);
682 free_state(cfg_state
);
685 free_state(run_state
);