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 bool skip_family[FW3_FAMILY_V6 + 1] = { false };
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 fw3_load_defaults(state, p);
66 fw3_load_ipsets(state, p);
67 fw3_load_zones(state, p);
68 fw3_load_rules(state, p);
69 fw3_load_redirects(state, p);
70 fw3_load_forwards(state, p);
72 if (state->defaults.disable_ipv6 && !skip_family[FW3_FAMILY_V6])
74 warn("IPv6 rules globally disabled in configuration");
75 skip_family[FW3_FAMILY_V6] = true;
82 free_state(struct fw3_state *state)
84 struct list_head *cur, *tmp;
86 list_for_each_safe(cur, tmp, &state->zones)
87 fw3_free_zone((struct fw3_zone *)cur);
89 list_for_each_safe(cur, tmp, &state->rules)
90 fw3_free_rule((struct fw3_rule *)cur);
92 list_for_each_safe(cur, tmp, &state->redirects)
93 fw3_free_redirect((struct fw3_redirect *)cur);
95 list_for_each_safe(cur, tmp, &state->forwards)
96 fw3_free_forward((struct fw3_forward *)cur);
98 uci_free_context(state->uci);
102 fw3_ubus_disconnect();
107 restore_pipe(enum fw3_family family, bool silent)
109 const char *cmd[] = {
116 return fw3_stdout_pipe();
118 if (!fw3_command_pipe(silent, cmd[family], "--lenient", "--noflush"))
120 warn("Unable to execute %s", cmd[family]);
128 stop(struct fw3_state *state, bool complete, bool ipsets)
130 enum fw3_family family;
131 enum fw3_table table;
133 struct list_head *statefile = fw3_read_state();
135 const char *tables[] = {
142 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
144 if (skip_family[family] || !restore_pipe(family, true))
147 info("Removing IPv%d rules ...", family == FW3_FAMILY_V4 ? 4 : 6);
149 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
151 if (!fw3_has_table(family == FW3_FAMILY_V6, tables[table]))
154 info(" * %sing %s table",
155 complete ? "Flush" : "Clear", tables[table]);
157 fw3_pr("*%s\n", tables[table]);
161 fw3_flush_all(table);
166 fw3_flush_rules(table, family, false, statefile);
167 fw3_flush_zones(table, family, false, statefile);
170 fw3_flush_rules(table, family, true, statefile);
171 fw3_flush_zones(table, family, true, statefile);
180 if (ipsets && fw3_command_pipe(false, "ipset", "-exist", "-"))
182 fw3_destroy_ipsets(statefile);
186 fw3_free_state(statefile);
192 start(struct fw3_state *state)
194 enum fw3_family family;
195 enum fw3_table table;
197 const char *tables[] = {
204 if (!print_rules && fw3_command_pipe(false, "ipset", "-exist", "-"))
206 fw3_create_ipsets(state);
210 for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
212 if (skip_family[family] || !restore_pipe(family, false))
215 info("Constructing IPv%d rules ...", family == FW3_FAMILY_V4 ? 4 : 6);
217 for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
219 if (!fw3_has_table(family == FW3_FAMILY_V6, tables[table]))
222 info(" * Populating %s table", tables[table]);
224 fw3_pr("*%s\n", tables[table]);
225 fw3_print_default_chains(table, family, state);
226 fw3_print_zone_chains(table, family, state);
227 fw3_print_default_head_rules(table, family, state);
228 fw3_print_rules(table, family, state);
229 fw3_print_redirects(table, family, state);
230 fw3_print_forwards(table, family, state);
231 fw3_print_zone_rules(table, family, state);
232 fw3_print_default_tail_rules(table, family, state);
243 lookup_network(struct fw3_state *state, const char *net)
246 struct fw3_device *d;
248 list_for_each_entry(z, &state->zones, list)
250 list_for_each_entry(d, &z->networks, list)
252 if (!strcmp(d->name, net))
254 printf("%s\n", z->name);
264 lookup_device(struct fw3_state *state, const char *dev)
267 struct fw3_device *d;
269 list_for_each_entry(z, &state->zones, list)
271 list_for_each_entry(d, &z->devices, list)
273 if (!strcmp(d->name, dev))
275 printf("%s\n", z->name);
287 fprintf(stderr, "fw3 [-4] [-6] [-q] {start|stop|flush|restart|print}\n");
288 fprintf(stderr, "fw3 [-q] network {net}\n");
289 fprintf(stderr, "fw3 [-q] device {dev}\n");
295 int main(int argc, char **argv)
298 struct fw3_state *state = NULL;
300 while ((ch = getopt(argc, argv, "46qh")) != -1)
305 skip_family[FW3_FAMILY_V4] = false;
306 skip_family[FW3_FAMILY_V6] = true;
310 skip_family[FW3_FAMILY_V4] = true;
311 skip_family[FW3_FAMILY_V6] = false;
315 freopen("/dev/null", "w", stderr);
324 if (!fw3_ubus_connect())
325 error("Failed to connect to ubus");
327 state = build_state();
338 if (!strcmp(argv[optind], "print"))
340 freopen("/dev/null", "w", stderr);
342 state->disable_ipsets = true;
345 if (!skip_family[FW3_FAMILY_V4] && !skip_family[FW3_FAMILY_V6])
346 skip_family[FW3_FAMILY_V6] = true;
350 else if (!strcmp(argv[optind], "start"))
354 warn("The firewall appears to be started already. "
355 "If it is indeed empty, remove the %s file and retry.",
362 fw3_write_state(state);
364 else if (!strcmp(argv[optind], "stop"))
366 if (!fw3_has_state())
368 warn("The firewall appears to be stopped. "
369 "Use the 'flush' command to forcefully purge all rules.");
374 rv = stop(state, false, true);
378 else if (!strcmp(argv[optind], "flush"))
380 rv = stop(state, true, true);
385 else if (!strcmp(argv[optind], "restart"))
389 stop(state, false, false);
394 fw3_write_state(state);
396 else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
398 rv = lookup_network(state, argv[optind + 1]);
400 else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
402 rv = lookup_device(state, argv[optind + 1]);