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"
33 static bool print_rules
= false;
34 static enum fw3_family use_family
= FW3_FAMILY_ANY
;
37 static struct fw3_state
*
40 struct fw3_state
*state
= NULL
;
41 struct uci_package
*p
= NULL
;
43 if (!fw3_ubus_connect())
44 error("Failed to connect to ubus");
46 state
= malloc(sizeof(*state
));
49 error("Out of memory");
51 memset(state
, 0, sizeof(*state
));
52 state
->uci
= uci_alloc_context();
55 error("Out of memory");
57 if (uci_load(state
->uci
, "firewall", &p
))
59 uci_perror(state
->uci
, NULL
);
60 error("Failed to load /etc/config/firewall");
63 if (!fw3_find_command("ipset"))
65 warn("Unable to locate ipset utility, disabling ipset support");
66 state
->disable_ipsets
= true;
69 INIT_LIST_HEAD(&state
->running_zones
);
70 INIT_LIST_HEAD(&state
->running_ipsets
);
72 fw3_load_defaults(state
, p
);
73 fw3_load_ipsets(state
, p
);
74 fw3_load_zones(state
, p
);
75 fw3_load_rules(state
, p
);
76 fw3_load_redirects(state
, p
);
77 fw3_load_forwards(state
, p
);
78 fw3_load_includes(state
, p
);
80 state
->statefile
= fw3_read_statefile(state
);
86 free_state(struct fw3_state
*state
)
88 struct list_head
*cur
, *tmp
;
90 list_for_each_safe(cur
, tmp
, &state
->zones
)
91 fw3_free_zone((struct fw3_zone
*)cur
);
93 list_for_each_safe(cur
, tmp
, &state
->rules
)
94 fw3_free_rule((struct fw3_rule
*)cur
);
96 list_for_each_safe(cur
, tmp
, &state
->redirects
)
97 fw3_free_redirect((struct fw3_redirect
*)cur
);
99 list_for_each_safe(cur
, tmp
, &state
->forwards
)
100 fw3_free_forward((struct fw3_forward
*)cur
);
102 list_for_each_safe(cur
, tmp
, &state
->ipsets
)
103 fw3_free_ipset((struct fw3_ipset
*)cur
);
105 list_for_each_safe(cur
, tmp
, &state
->includes
)
106 fw3_free_include((struct fw3_include
*)cur
);
108 uci_free_context(state
->uci
);
112 fw3_ubus_disconnect();
117 restore_pipe(enum fw3_family family
, bool silent
)
121 cmd
= (family
== FW3_FAMILY_V4
) ? "iptables-restore" : "ip6tables-restore";
124 return fw3_stdout_pipe();
126 if (!fw3_command_pipe(silent
, cmd
, "--lenient", "--noflush"))
128 warn("Unable to execute %s", cmd
);
136 family_running(struct fw3_state
*state
, enum fw3_family family
)
138 return hasbit(state
->running_defaults
.flags
, family
);
142 family_used(enum fw3_family family
)
144 return (use_family
== FW3_FAMILY_ANY
) || (use_family
== family
);
148 family_loaded(struct fw3_state
*state
, enum fw3_family family
)
150 return hasbit(state
->defaults
.flags
, family
);
154 family_set(struct fw3_state
*state
, enum fw3_family family
, bool set
)
157 setbit(state
->defaults
.flags
, family
);
159 delbit(state
->defaults
.flags
, family
);
163 stop(struct fw3_state
*state
, bool complete
, bool reload
)
166 enum fw3_family family
;
167 enum fw3_table table
;
168 enum fw3_target policy
= reload
? FW3_TARGET_DROP
: FW3_TARGET_ACCEPT
;
170 if (!complete
&& !state
->statefile
)
173 warn("The firewall appears to be stopped. "
174 "Use the 'flush' command to forcefully purge all rules.");
179 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
181 if (!complete
&& !family_running(state
, family
))
184 if (!family_used(family
) || !restore_pipe(family
, true))
187 info("Removing %s rules ...", fw3_flag_names
[family
]);
189 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
191 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
194 info(" * %sing %s table",
195 complete
? "Flush" : "Clear", fw3_flag_names
[table
]);
197 fw3_pr("*%s\n", fw3_flag_names
[table
]);
201 fw3_flush_all(table
);
206 fw3_flush_rules(table
, family
, false, state
, policy
);
207 fw3_flush_zones(table
, family
, false, state
);
210 fw3_flush_rules(table
, family
, true, state
, policy
);
211 fw3_flush_zones(table
, family
, true, state
);
220 family_set(state
, family
, false);
225 if (!reload
&& fw3_command_pipe(false, "ipset", "-exist", "-"))
227 fw3_destroy_ipsets(state
);
232 fw3_write_statefile(state
);
238 start(struct fw3_state
*state
, bool reload
)
241 enum fw3_family family
;
242 enum fw3_table table
;
244 if (!print_rules
&& !reload
)
246 fw3_set_defaults(state
);
248 if (fw3_command_pipe(false, "ipset", "-exist", "-"))
250 fw3_create_ipsets(state
);
255 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
257 if (!family_used(family
))
260 if (!print_rules
&& !reload
&& family_running(state
, 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 if (!family_loaded(state
, family
) || !restore_pipe(family
, false))
272 info("Constructing %s rules ...", fw3_flag_names
[family
]);
274 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
276 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
279 info(" * Populating %s table", fw3_flag_names
[table
]);
281 fw3_pr("*%s\n", fw3_flag_names
[table
]);
282 fw3_print_default_chains(table
, family
, state
);
283 fw3_print_zone_chains(table
, family
, state
);
284 fw3_print_default_head_rules(table
, family
, state
);
285 fw3_print_rules(table
, family
, state
);
286 fw3_print_redirects(table
, family
, state
);
287 fw3_print_forwards(table
, family
, state
);
288 fw3_print_zone_rules(table
, family
, state
);
289 fw3_print_default_tail_rules(table
, family
, state
);
294 fw3_print_includes(family
, state
);
297 family_set(state
, family
, true);
302 if (!reload
&& !print_rules
)
303 fw3_run_includes(state
);
305 if (!rv
&& !print_rules
)
306 fw3_write_statefile(state
);
312 lookup_network(struct fw3_state
*state
, const char *net
)
315 struct fw3_device
*d
;
317 list_for_each_entry(z
, &state
->zones
, list
)
319 list_for_each_entry(d
, &z
->networks
, list
)
321 if (!strcmp(d
->name
, net
))
323 printf("%s\n", z
->name
);
333 lookup_device(struct fw3_state
*state
, const char *dev
)
336 struct fw3_device
*d
;
338 list_for_each_entry(z
, &state
->zones
, list
)
340 list_for_each_entry(d
, &z
->devices
, list
)
342 if (!strcmp(d
->name
, dev
))
344 printf("%s\n", z
->name
);
356 fprintf(stderr
, "fw3 [-4] [-6] [-q] {start|stop|flush|reload|restart|print}\n");
357 fprintf(stderr
, "fw3 [-q] network {net}\n");
358 fprintf(stderr
, "fw3 [-q] device {dev}\n");
364 int main(int argc
, char **argv
)
367 struct fw3_state
*state
= NULL
;
368 struct fw3_defaults
*defs
= NULL
;
370 while ((ch
= getopt(argc
, argv
, "46dqh")) != -1)
375 use_family
= FW3_FAMILY_V4
;
379 use_family
= FW3_FAMILY_V6
;
387 freopen("/dev/null", "w", stderr
);
396 state
= build_state();
397 defs
= &state
->defaults
;
408 if (use_family
== FW3_FAMILY_V6
&& defs
->disable_ipv6
)
409 warn("IPv6 rules globally disabled in configuration");
411 if (!strcmp(argv
[optind
], "print"))
413 if (use_family
== FW3_FAMILY_ANY
)
414 use_family
= FW3_FAMILY_V4
;
416 freopen("/dev/null", "w", stderr
);
418 state
->disable_ipsets
= true;
421 rv
= start(state
, false);
423 else if (!strcmp(argv
[optind
], "start"))
425 rv
= start(state
, false);
427 else if (!strcmp(argv
[optind
], "stop"))
429 rv
= stop(state
, false, false);
431 else if (!strcmp(argv
[optind
], "flush"))
433 rv
= stop(state
, true, false);
435 else if (!strcmp(argv
[optind
], "restart"))
437 stop(state
, true, false);
440 state
= build_state();
441 rv
= start(state
, false);
443 else if (!strcmp(argv
[optind
], "reload"))
445 rv
= stop(state
, false, true);
446 rv
= start(state
, !rv
);
448 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
450 rv
= lookup_network(state
, argv
[optind
+ 1]);
452 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
454 rv
= lookup_device(state
, argv
[optind
+ 1]);