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"
32 static bool print_rules
= false;
33 static enum fw3_family use_family
= FW3_FAMILY_ANY
;
36 static struct fw3_state
*
39 struct fw3_state
*state
= NULL
;
40 struct uci_package
*p
= NULL
;
42 state
= malloc(sizeof(*state
));
45 error("Out of memory");
47 memset(state
, 0, sizeof(*state
));
48 state
->uci
= uci_alloc_context();
51 error("Out of memory");
53 if (uci_load(state
->uci
, "firewall", &p
))
55 uci_perror(state
->uci
, NULL
);
56 error("Failed to load /etc/config/firewall");
59 if (!fw3_find_command("ipset"))
61 warn("Unable to locate ipset utility, disabling ipset support");
62 state
->disable_ipsets
= true;
65 INIT_LIST_HEAD(&state
->running_zones
);
66 INIT_LIST_HEAD(&state
->running_ipsets
);
68 fw3_load_defaults(state
, p
);
69 fw3_load_ipsets(state
, p
);
70 fw3_load_zones(state
, p
);
71 fw3_load_rules(state
, p
);
72 fw3_load_redirects(state
, p
);
73 fw3_load_forwards(state
, p
);
75 state
->statefile
= fw3_read_statefile(state
);
81 free_state(struct fw3_state
*state
)
83 struct list_head
*cur
, *tmp
;
85 list_for_each_safe(cur
, tmp
, &state
->zones
)
86 fw3_free_zone((struct fw3_zone
*)cur
);
88 list_for_each_safe(cur
, tmp
, &state
->rules
)
89 fw3_free_rule((struct fw3_rule
*)cur
);
91 list_for_each_safe(cur
, tmp
, &state
->redirects
)
92 fw3_free_redirect((struct fw3_redirect
*)cur
);
94 list_for_each_safe(cur
, tmp
, &state
->forwards
)
95 fw3_free_forward((struct fw3_forward
*)cur
);
97 list_for_each_safe(cur
, tmp
, &state
->ipsets
)
98 fw3_free_ipset((struct fw3_ipset
*)cur
);
100 uci_free_context(state
->uci
);
104 fw3_ubus_disconnect();
109 restore_pipe(enum fw3_family family
, bool silent
)
113 cmd
= (family
== FW3_FAMILY_V4
) ? "iptables-restore" : "ip6tables-restore";
116 return fw3_stdout_pipe();
118 if (!fw3_command_pipe(silent
, cmd
, "--lenient", "--noflush"))
120 warn("Unable to execute %s", cmd
);
128 family_running(struct fw3_state
*state
, enum fw3_family family
)
130 return hasbit(state
->running_defaults
.flags
, family
);
134 family_used(enum fw3_family family
)
136 return (use_family
== FW3_FAMILY_ANY
) || (use_family
== family
);
140 family_loaded(struct fw3_state
*state
, enum fw3_family family
)
142 return hasbit(state
->defaults
.flags
, family
);
146 family_set(struct fw3_state
*state
, enum fw3_family family
, bool set
)
149 setbit(state
->defaults
.flags
, family
);
151 delbit(state
->defaults
.flags
, family
);
155 stop(struct fw3_state
*state
, bool complete
, bool restart
)
158 enum fw3_family family
;
159 enum fw3_table table
;
161 if (!complete
&& !state
->statefile
)
164 warn("The firewall appears to be stopped. "
165 "Use the 'flush' command to forcefully purge all rules.");
170 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
172 if (!complete
&& !family_running(state
, family
))
175 if (!family_used(family
) || !restore_pipe(family
, true))
178 info("Removing %s rules ...", fw3_flag_names
[family
]);
180 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
182 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
185 info(" * %sing %s table",
186 complete
? "Flush" : "Clear", fw3_flag_names
[table
]);
188 fw3_pr("*%s\n", fw3_flag_names
[table
]);
192 fw3_flush_all(table
);
197 fw3_flush_rules(table
, family
, false, state
);
198 fw3_flush_zones(table
, family
, false, state
);
201 fw3_flush_rules(table
, family
, true, state
);
202 fw3_flush_zones(table
, family
, true, state
);
211 family_set(state
, family
, false);
216 if (!restart
&& fw3_command_pipe(false, "ipset", "-exist", "-"))
218 fw3_destroy_ipsets(state
);
223 fw3_write_statefile(state
);
229 start(struct fw3_state
*state
, bool restart
)
232 enum fw3_family family
;
233 enum fw3_table table
;
235 if (!print_rules
&& !restart
&&
236 fw3_command_pipe(false, "ipset", "-exist", "-"))
238 fw3_create_ipsets(state
);
242 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
244 if (!family_used(family
))
247 if (!print_rules
&& !restart
&& family_running(state
, family
))
249 warn("The %s firewall appears to be started already. "
250 "If it is indeed empty, remove the %s file and retry.",
251 fw3_flag_names
[family
], FW3_STATEFILE
);
256 if (!family_loaded(state
, family
) || !restore_pipe(family
, false))
259 info("Constructing %s rules ...", fw3_flag_names
[family
]);
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 info(" * Populating %s table", fw3_flag_names
[table
]);
268 fw3_pr("*%s\n", fw3_flag_names
[table
]);
269 fw3_print_default_chains(table
, family
, state
);
270 fw3_print_zone_chains(table
, family
, state
);
271 fw3_print_default_head_rules(table
, family
, state
);
272 fw3_print_rules(table
, family
, state
);
273 fw3_print_redirects(table
, family
, state
);
274 fw3_print_forwards(table
, family
, state
);
275 fw3_print_zone_rules(table
, family
, state
);
276 fw3_print_default_tail_rules(table
, family
, state
);
281 family_set(state
, family
, true);
286 if (!rv
&& !print_rules
)
287 fw3_write_statefile(state
);
293 lookup_network(struct fw3_state
*state
, const char *net
)
296 struct fw3_device
*d
;
298 list_for_each_entry(z
, &state
->zones
, list
)
300 list_for_each_entry(d
, &z
->networks
, list
)
302 if (!strcmp(d
->name
, net
))
304 printf("%s\n", z
->name
);
314 lookup_device(struct fw3_state
*state
, const char *dev
)
317 struct fw3_device
*d
;
319 list_for_each_entry(z
, &state
->zones
, list
)
321 list_for_each_entry(d
, &z
->devices
, list
)
323 if (!strcmp(d
->name
, dev
))
325 printf("%s\n", z
->name
);
337 fprintf(stderr
, "fw3 [-4] [-6] [-q] {start|stop|flush|restart|print}\n");
338 fprintf(stderr
, "fw3 [-q] network {net}\n");
339 fprintf(stderr
, "fw3 [-q] device {dev}\n");
345 int main(int argc
, char **argv
)
348 struct fw3_state
*state
= NULL
;
349 struct fw3_defaults
*defs
= NULL
;
351 while ((ch
= getopt(argc
, argv
, "46qh")) != -1)
356 use_family
= FW3_FAMILY_V4
;
360 use_family
= FW3_FAMILY_V6
;
364 freopen("/dev/null", "w", stderr
);
373 if (!fw3_ubus_connect())
374 error("Failed to connect to ubus");
376 state
= build_state();
377 defs
= &state
->defaults
;
388 if (use_family
== FW3_FAMILY_V6
&& defs
->disable_ipv6
)
389 warn("IPv6 rules globally disabled in configuration");
391 if (!strcmp(argv
[optind
], "print"))
393 if (use_family
== FW3_FAMILY_ANY
)
394 use_family
= FW3_FAMILY_V4
;
396 freopen("/dev/null", "w", stderr
);
398 state
->disable_ipsets
= true;
401 rv
= start(state
, false);
403 else if (!strcmp(argv
[optind
], "start"))
405 rv
= start(state
, false);
407 else if (!strcmp(argv
[optind
], "stop"))
409 rv
= stop(state
, false, false);
411 else if (!strcmp(argv
[optind
], "flush"))
413 rv
= stop(state
, true, false);
415 else if (!strcmp(argv
[optind
], "restart"))
417 rv
= stop(state
, false, true);
418 rv
= start(state
, !rv
);
420 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
422 rv
= lookup_network(state
, argv
[optind
+ 1]);
424 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
426 rv
= lookup_device(state
, argv
[optind
+ 1]);