116050ae060bcd2d9a8d3a22f22bb1263b5201b2
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 family_running(enum fw3_family family
)
145 return (run_state
&& has(run_state
->defaults
.flags
, family
, family
));
149 family_set(struct fw3_state
*state
, enum fw3_family family
, bool set
)
155 set(state
->defaults
.flags
, family
, family
);
157 del(state
->defaults
.flags
, family
, family
);
166 enum fw3_family family
;
167 enum fw3_table table
;
168 struct fw3_ipt_handle
*handle
;
170 if (!complete
&& !run_state
)
172 warn("The firewall appears to be stopped. "
173 "Use the 'flush' command to forcefully purge all rules.");
178 if (!print_rules
&& run_state
)
179 fw3_hotplug_zones(run_state
, false);
181 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
183 if (!complete
&& !family_running(family
))
186 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
188 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
191 if (!(handle
= fw3_ipt_open(family
, table
)))
194 info(" * %sing %s %s table", complete
? "Flush" : "Clear",
195 fw3_flag_names
[family
], fw3_flag_names
[table
]);
199 fw3_flush_all(handle
);
203 fw3_flush_rules(handle
, run_state
, false);
204 fw3_flush_zones(handle
, run_state
, false);
207 fw3_ipt_commit(handle
);
210 family_set(run_state
, family
, false);
211 family_set(cfg_state
, family
, false);
218 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
220 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
;
249 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
251 fw3_create_ipsets(cfg_state
);
256 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
258 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
261 if (!print_rules
&& family_running(family
))
263 warn("The %s firewall appears to be started already. "
264 "If it is indeed empty, remove the %s file and retry.",
265 fw3_flag_names
[family
], FW3_STATEFILE
);
270 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
272 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
275 if (!(handle
= fw3_ipt_open(family
, table
)))
278 info(" * Populating %s %s table",
279 fw3_flag_names
[family
], fw3_flag_names
[table
]);
281 fw3_print_default_chains(handle
, cfg_state
, false);
282 fw3_print_zone_chains(handle
, cfg_state
, false);
283 fw3_print_default_head_rules(handle
, cfg_state
, false);
284 fw3_print_rules(handle
, cfg_state
);
285 fw3_print_redirects(handle
, cfg_state
);
286 fw3_print_forwards(handle
, cfg_state
);
287 fw3_print_zone_rules(handle
, cfg_state
, false);
288 fw3_print_default_tail_rules(handle
, cfg_state
, false);
291 fw3_ipt_commit(handle
);
294 //fw3_print_includes(cfg_state, family, false);
296 family_set(run_state
, family
, true);
297 family_set(cfg_state
, family
, true);
304 fw3_set_defaults(cfg_state
);
308 fw3_run_includes(cfg_state
, false);
309 fw3_hotplug_zones(cfg_state
, true);
310 fw3_write_statefile(cfg_state
);
322 enum fw3_family family
;
323 enum fw3_table table
;
324 struct fw3_ipt_handle
*handle
;
326 if (!print_rules
&& run_state
)
327 fw3_hotplug_zones(run_state
, false);
329 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
331 if (!family_running(family
))
334 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
336 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
339 if (!(handle
= fw3_ipt_open(family
, table
)))
342 info(" * Clearing %s %s table",
343 fw3_flag_names
[family
], fw3_flag_names
[table
]);
347 fw3_flush_rules(handle
, run_state
, true);
348 fw3_flush_zones(handle
, run_state
, true);
351 fw3_ipt_commit(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_forwards(handle
, cfg_state
);
378 fw3_print_zone_rules(handle
, cfg_state
, true);
379 fw3_print_default_tail_rules(handle
, cfg_state
, true);
381 fw3_ipt_commit(handle
);
384 //fw3_print_includes(cfg_state, family, true);
386 family_set(run_state
, family
, true);
387 family_set(cfg_state
, family
, true);
394 fw3_set_defaults(cfg_state
);
398 fw3_run_includes(cfg_state
, true);
399 fw3_hotplug_zones(cfg_state
, true);
400 fw3_write_statefile(cfg_state
);
408 lookup_network(const char *net
)
411 struct fw3_device
*d
;
413 list_for_each_entry(z
, &cfg_state
->zones
, list
)
415 list_for_each_entry(d
, &z
->networks
, list
)
417 if (!strcmp(d
->name
, net
))
419 printf("%s\n", z
->name
);
429 lookup_device(const char *dev
)
432 struct fw3_device
*d
;
434 list_for_each_entry(z
, &cfg_state
->zones
, list
)
436 list_for_each_entry(d
, &z
->devices
, list
)
438 if (!strcmp(d
->name
, dev
))
440 printf("%s\n", z
->name
);
452 fprintf(stderr
, "fw3 [-4] [-6] [-q] print\n");
453 fprintf(stderr
, "fw3 [-q] {start|stop|flush|reload|restart}\n");
454 fprintf(stderr
, "fw3 [-q] network {net}\n");
455 fprintf(stderr
, "fw3 [-q] device {dev}\n");
461 int main(int argc
, char **argv
)
464 struct fw3_defaults
*defs
= NULL
;
465 enum fw3_family use_family
= FW3_FAMILY_ANY
;
467 while ((ch
= getopt(argc
, argv
, "46dqh")) != -1)
472 use_family
= FW3_FAMILY_V4
;
476 use_family
= FW3_FAMILY_V6
;
484 freopen("/dev/null", "w", stderr
);
495 defs
= &cfg_state
->defaults
;
503 if (!strcmp(argv
[optind
], "print"))
505 if (use_family
== FW3_FAMILY_ANY
)
506 use_family
= FW3_FAMILY_V4
;
507 else if (use_family
== FW3_FAMILY_V6
&& defs
->disable_ipv6
)
508 warn("IPv6 rules globally disabled in configuration");
510 freopen("/dev/null", "w", stderr
);
512 cfg_state
->disable_ipsets
= true;
518 else if (!strcmp(argv
[optind
], "start"))
526 else if (!strcmp(argv
[optind
], "stop"))
534 else if (!strcmp(argv
[optind
], "flush"))
542 else if (!strcmp(argv
[optind
], "restart"))
551 else if (!strcmp(argv
[optind
], "reload"))
559 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
561 rv
= lookup_network(argv
[optind
+ 1]);
563 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
565 rv
= lookup_device(argv
[optind
+ 1]);
574 free_state(cfg_state
);
577 free_state(run_state
);