17d71d19ea331c0d26279baa7348ac709289782e
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;
102 struct blob_buf b
= {NULL
, NULL
, 0, NULL
};
105 fw3_load_defaults(state
, p
);
106 fw3_load_ipsets(state
, p
);
107 fw3_load_zones(state
, p
);
108 fw3_load_rules(state
, p
, b
.head
);
109 fw3_load_redirects(state
, p
);
110 fw3_load_snats(state
, p
, b
.head
);
111 fw3_load_forwards(state
, p
);
112 fw3_load_includes(state
, p
);
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 uci_free_context(state
->uci
);
147 fw3_ubus_disconnect();
152 family_running(enum fw3_family family
)
154 return (run_state
&& has(run_state
->defaults
.flags
, family
, family
));
158 family_set(struct fw3_state
*state
, enum fw3_family family
, bool set
)
164 set(state
->defaults
.flags
, family
, family
);
166 del(state
->defaults
.flags
, family
, family
);
175 enum fw3_family family
;
176 enum fw3_table table
;
177 struct fw3_ipt_handle
*handle
;
179 if (!complete
&& !run_state
)
181 warn("The firewall appears to be stopped. "
182 "Use the 'flush' command to forcefully purge all rules.");
187 if (!print_family
&& run_state
)
188 fw3_hotplug_zones(run_state
, false);
190 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
192 if (!complete
&& !family_running(family
))
195 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
197 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
200 if (!(handle
= fw3_ipt_open(family
, table
)))
203 info(" * %sing %s %s table", complete
? "Flush" : "Clear",
204 fw3_flag_names
[family
], fw3_flag_names
[table
]);
208 fw3_flush_all(handle
);
212 fw3_flush_rules(handle
, run_state
, false);
213 fw3_flush_zones(handle
, run_state
, false);
216 fw3_ipt_commit(handle
);
217 fw3_ipt_close(handle
);
220 family_set(run_state
, family
, false);
221 family_set(cfg_state
, family
, false);
227 fw3_destroy_ipsets(run_state
);
229 if (complete
&& (ct
= fopen("/proc/net/nf_conntrack", "w")) != NULL
)
231 info(" * Flushing conntrack table ...");
233 fwrite("f\n", 2, 1, ct
);
237 if (!rv
&& run_state
)
238 fw3_write_statefile(run_state
);
247 enum fw3_family family
;
248 enum fw3_table table
;
249 struct fw3_ipt_handle
*handle
;
252 fw3_create_ipsets(cfg_state
);
254 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
256 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
259 if (print_family
&& family
!= print_family
)
262 if (!print_family
&& family_running(family
))
264 warn("The %s firewall appears to be started already. "
265 "If it is indeed empty, remove the %s file and retry.",
266 fw3_flag_names
[family
], FW3_STATEFILE
);
271 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
273 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
276 if (!(handle
= fw3_ipt_open(family
, table
)))
279 info(" * Populating %s %s table",
280 fw3_flag_names
[family
], fw3_flag_names
[table
]);
282 fw3_print_default_chains(handle
, cfg_state
, false);
283 fw3_print_zone_chains(handle
, cfg_state
, false);
284 fw3_print_default_head_rules(handle
, cfg_state
, false);
285 fw3_print_rules(handle
, cfg_state
);
286 fw3_print_redirects(handle
, cfg_state
);
287 fw3_print_snats(handle
, cfg_state
);
288 fw3_print_forwards(handle
, cfg_state
);
289 fw3_print_zone_rules(handle
, cfg_state
, false);
290 fw3_print_default_tail_rules(handle
, cfg_state
, false);
293 fw3_ipt_commit(handle
);
295 fw3_ipt_close(handle
);
299 fw3_print_includes(cfg_state
, family
, false);
301 family_set(run_state
, family
, true);
302 family_set(cfg_state
, family
, true);
309 fw3_set_defaults(cfg_state
);
313 fw3_run_includes(cfg_state
, false);
314 fw3_hotplug_zones(cfg_state
, true);
315 fw3_write_statefile(cfg_state
);
327 enum fw3_family family
;
328 enum fw3_table table
;
329 struct fw3_ipt_handle
*handle
;
334 fw3_hotplug_zones(run_state
, false);
336 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
338 if (!family_running(family
))
341 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
343 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
346 if (!(handle
= fw3_ipt_open(family
, table
)))
349 info(" * Clearing %s %s table",
350 fw3_flag_names
[family
], fw3_flag_names
[table
]);
352 fw3_flush_rules(handle
, run_state
, true);
353 fw3_flush_zones(handle
, run_state
, true);
354 fw3_ipt_commit(handle
);
355 fw3_ipt_close(handle
);
358 family_set(run_state
, family
, false);
359 family_set(cfg_state
, family
, false);
362 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
365 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
367 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
370 if (!(handle
= fw3_ipt_open(family
, table
)))
373 info(" * Populating %s %s table",
374 fw3_flag_names
[family
], fw3_flag_names
[table
]);
376 fw3_print_default_chains(handle
, cfg_state
, true);
377 fw3_print_zone_chains(handle
, cfg_state
, true);
378 fw3_print_default_head_rules(handle
, cfg_state
, true);
379 fw3_print_rules(handle
, cfg_state
);
380 fw3_print_redirects(handle
, cfg_state
);
381 fw3_print_snats(handle
, cfg_state
);
382 fw3_print_forwards(handle
, cfg_state
);
383 fw3_print_zone_rules(handle
, cfg_state
, true);
384 fw3_print_default_tail_rules(handle
, cfg_state
, true);
386 fw3_ipt_commit(handle
);
387 fw3_ipt_close(handle
);
390 fw3_print_includes(cfg_state
, family
, true);
392 family_set(run_state
, family
, true);
393 family_set(cfg_state
, family
, true);
400 fw3_set_defaults(cfg_state
);
401 fw3_run_includes(cfg_state
, true);
402 fw3_hotplug_zones(cfg_state
, true);
403 fw3_write_statefile(cfg_state
);
410 lookup_network(const char *net
)
413 struct fw3_device
*d
;
415 list_for_each_entry(z
, &cfg_state
->zones
, list
)
417 list_for_each_entry(d
, &z
->networks
, list
)
419 if (!strcmp(d
->name
, net
))
421 printf("%s\n", z
->name
);
431 lookup_device(const char *dev
)
434 struct fw3_device
*d
;
436 list_for_each_entry(z
, &cfg_state
->zones
, list
)
438 list_for_each_entry(d
, &z
->devices
, list
)
440 if (!strcmp(d
->name
, dev
))
442 printf("%s\n", z
->name
);
452 lookup_zone(const char *zone
, const char *device
)
455 struct fw3_device
*d
;
457 list_for_each_entry(z
, &cfg_state
->zones
, list
)
459 if (strcmp(z
->name
, zone
))
462 list_for_each_entry(d
, &z
->devices
, list
)
464 if (device
&& strcmp(device
, d
->name
))
467 printf("%s\n", d
->name
);
483 fprintf(stderr
, "fw3 [-4] [-6] [-q] print\n");
484 fprintf(stderr
, "fw3 [-q] {start|stop|flush|reload|restart}\n");
485 fprintf(stderr
, "fw3 [-q] network {net}\n");
486 fprintf(stderr
, "fw3 [-q] device {dev}\n");
487 fprintf(stderr
, "fw3 [-q] zone {zone} [dev]\n");
493 int main(int argc
, char **argv
)
496 enum fw3_family family
= FW3_FAMILY_ANY
;
497 struct fw3_defaults
*defs
= NULL
;
499 while ((ch
= getopt(argc
, argv
, "46dqh")) != -1)
504 family
= FW3_FAMILY_V4
;
508 family
= FW3_FAMILY_V6
;
516 if (freopen("/dev/null", "w", stderr
)) {}
527 defs
= &cfg_state
->defaults
;
535 if (!strcmp(argv
[optind
], "print"))
537 if (family
== FW3_FAMILY_ANY
)
539 family
= FW3_FAMILY_V4
;
541 else if (family
== FW3_FAMILY_V6
)
543 if (defs
->disable_ipv6
)
544 warn("IPv6 rules globally disabled in configuration");
547 warn("IPv6 support is not compiled in");
551 if (freopen("/dev/null", "w", stderr
)) {};
553 cfg_state
->disable_ipsets
= true;
554 print_family
= family
;
559 else if (!strcmp(argv
[optind
], "start"))
567 else if (!strcmp(argv
[optind
], "stop"))
575 else if (!strcmp(argv
[optind
], "flush"))
583 else if (!strcmp(argv
[optind
], "restart"))
592 else if (!strcmp(argv
[optind
], "reload"))
600 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
602 rv
= lookup_network(argv
[optind
+ 1]);
604 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
606 rv
= lookup_device(argv
[optind
+ 1]);
608 else if (!strcmp(argv
[optind
], "zone") && (optind
+ 1) < argc
)
610 rv
= lookup_zone(argv
[optind
+ 1], argv
[optind
+ 2]);
619 free_state(cfg_state
);
622 free_state(run_state
);