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 enum fw3_family print_family
= FW3_FAMILY_ANY
;
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_family
&& 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);
217 fw3_destroy_ipsets(run_state
);
219 if (complete
&& (ct
= fopen("/proc/net/nf_conntrack", "w")) != NULL
)
221 info(" * Flushing conntrack table ...");
223 fwrite("f\n", 2, 1, ct
);
227 if (!rv
&& run_state
)
228 fw3_write_statefile(run_state
);
237 enum fw3_family family
;
238 enum fw3_table table
;
239 struct fw3_ipt_handle
*handle
;
242 fw3_create_ipsets(cfg_state
);
244 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
246 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
249 if (print_family
&& family
!= print_family
)
252 if (!print_family
&& family_running(family
))
254 warn("The %s firewall appears to be started already. "
255 "If it is indeed empty, remove the %s file and retry.",
256 fw3_flag_names
[family
], FW3_STATEFILE
);
261 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
263 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
266 if (!(handle
= fw3_ipt_open(family
, table
)))
269 info(" * Populating %s %s table",
270 fw3_flag_names
[family
], fw3_flag_names
[table
]);
272 fw3_print_default_chains(handle
, cfg_state
, false);
273 fw3_print_zone_chains(handle
, cfg_state
, false);
274 fw3_print_default_head_rules(handle
, cfg_state
, false);
275 fw3_print_rules(handle
, cfg_state
);
276 fw3_print_redirects(handle
, cfg_state
);
277 fw3_print_forwards(handle
, cfg_state
);
278 fw3_print_zone_rules(handle
, cfg_state
, false);
279 fw3_print_default_tail_rules(handle
, cfg_state
, false);
282 fw3_ipt_commit(handle
);
286 fw3_print_includes(cfg_state
, family
, false);
288 family_set(run_state
, family
, true);
289 family_set(cfg_state
, family
, true);
296 fw3_set_defaults(cfg_state
);
300 fw3_run_includes(cfg_state
, false);
301 fw3_hotplug_zones(cfg_state
, true);
302 fw3_write_statefile(cfg_state
);
314 enum fw3_family family
;
315 enum fw3_table table
;
316 struct fw3_ipt_handle
*handle
;
318 if (!print_family
&& run_state
)
319 fw3_hotplug_zones(run_state
, false);
321 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
323 if (!family_running(family
))
326 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
328 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
331 if (!(handle
= fw3_ipt_open(family
, table
)))
334 info(" * Clearing %s %s table",
335 fw3_flag_names
[family
], fw3_flag_names
[table
]);
339 fw3_flush_rules(handle
, run_state
, true);
340 fw3_flush_zones(handle
, run_state
, true);
343 fw3_ipt_commit(handle
);
346 family_set(run_state
, family
, false);
347 family_set(cfg_state
, family
, false);
350 if (family
== FW3_FAMILY_V6
&& cfg_state
->defaults
.disable_ipv6
)
353 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
355 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
358 if (!(handle
= fw3_ipt_open(family
, table
)))
361 info(" * Populating %s %s table",
362 fw3_flag_names
[family
], fw3_flag_names
[table
]);
364 fw3_print_default_chains(handle
, cfg_state
, true);
365 fw3_print_zone_chains(handle
, cfg_state
, true);
366 fw3_print_default_head_rules(handle
, cfg_state
, true);
367 fw3_print_rules(handle
, cfg_state
);
368 fw3_print_redirects(handle
, cfg_state
);
369 fw3_print_forwards(handle
, cfg_state
);
370 fw3_print_zone_rules(handle
, cfg_state
, true);
371 fw3_print_default_tail_rules(handle
, cfg_state
, true);
373 fw3_ipt_commit(handle
);
376 fw3_print_includes(cfg_state
, family
, true);
378 family_set(run_state
, family
, true);
379 family_set(cfg_state
, family
, true);
386 fw3_set_defaults(cfg_state
);
390 fw3_run_includes(cfg_state
, true);
391 fw3_hotplug_zones(cfg_state
, true);
392 fw3_write_statefile(cfg_state
);
400 lookup_network(const char *net
)
403 struct fw3_device
*d
;
405 list_for_each_entry(z
, &cfg_state
->zones
, list
)
407 list_for_each_entry(d
, &z
->networks
, list
)
409 if (!strcmp(d
->name
, net
))
411 printf("%s\n", z
->name
);
421 lookup_device(const char *dev
)
424 struct fw3_device
*d
;
426 list_for_each_entry(z
, &cfg_state
->zones
, list
)
428 list_for_each_entry(d
, &z
->devices
, list
)
430 if (!strcmp(d
->name
, dev
))
432 printf("%s\n", z
->name
);
444 fprintf(stderr
, "fw3 [-4] [-6] [-q] print\n");
445 fprintf(stderr
, "fw3 [-q] {start|stop|flush|reload|restart}\n");
446 fprintf(stderr
, "fw3 [-q] network {net}\n");
447 fprintf(stderr
, "fw3 [-q] device {dev}\n");
453 int main(int argc
, char **argv
)
456 struct fw3_defaults
*defs
= NULL
;
458 while ((ch
= getopt(argc
, argv
, "46dqh")) != -1)
463 print_family
= FW3_FAMILY_V4
;
467 print_family
= FW3_FAMILY_V6
;
475 freopen("/dev/null", "w", stderr
);
486 defs
= &cfg_state
->defaults
;
494 if (!strcmp(argv
[optind
], "print"))
496 if (print_family
== FW3_FAMILY_ANY
)
497 print_family
= FW3_FAMILY_V4
;
498 else if (print_family
== FW3_FAMILY_V6
&& defs
->disable_ipv6
)
499 warn("IPv6 rules globally disabled in configuration");
501 freopen("/dev/null", "w", stderr
);
503 cfg_state
->disable_ipsets
= true;
508 else if (!strcmp(argv
[optind
], "start"))
516 else if (!strcmp(argv
[optind
], "stop"))
524 else if (!strcmp(argv
[optind
], "flush"))
532 else if (!strcmp(argv
[optind
], "restart"))
541 else if (!strcmp(argv
[optind
], "reload"))
549 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
551 rv
= lookup_network(argv
[optind
+ 1]);
553 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
555 rv
= lookup_device(argv
[optind
+ 1]);
564 free_state(cfg_state
);
567 free_state(run_state
);