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.
19 #include "redirects.h"
22 const struct fw3_option fw3_redirect_opts
[] = {
23 FW3_OPT("name", string
, redirect
, name
),
24 FW3_OPT("family", family
, redirect
, family
),
26 FW3_OPT("src", device
, redirect
, src
),
27 FW3_OPT("dest", device
, redirect
, dest
),
29 FW3_OPT("ipset", device
, redirect
, ipset
),
31 FW3_LIST("proto", protocol
, redirect
, proto
),
33 FW3_OPT("src_ip", address
, redirect
, ip_src
),
34 FW3_LIST("src_mac", mac
, redirect
, mac_src
),
35 FW3_OPT("src_port", port
, redirect
, port_src
),
37 FW3_OPT("src_dip", address
, redirect
, ip_dest
),
38 FW3_OPT("src_dport", port
, redirect
, port_dest
),
40 FW3_OPT("dest_ip", address
, redirect
, ip_redir
),
41 FW3_OPT("dest_port", port
, redirect
, port_redir
),
43 FW3_OPT("extra", string
, redirect
, extra
),
45 FW3_OPT("utc_time", bool, redirect
, time
.utc
),
46 FW3_OPT("start_date", date
, redirect
, time
.datestart
),
47 FW3_OPT("stop_date", date
, redirect
, time
.datestop
),
48 FW3_OPT("start_time", time
, redirect
, time
.timestart
),
49 FW3_OPT("stop_time", time
, redirect
, time
.timestop
),
50 FW3_OPT("weekdays", weekdays
, redirect
, time
.weekdays
),
51 FW3_OPT("monthdays", monthdays
, redirect
, time
.monthdays
),
53 FW3_OPT("reflection", bool, redirect
, reflection
),
55 FW3_OPT("target", target
, redirect
, target
),
62 check_families(struct uci_element
*e
, struct fw3_redirect
*r
)
64 if (r
->family
== FW3_FAMILY_ANY
)
67 if (r
->_src
&& r
->_src
->family
&& r
->_src
->family
!= r
->family
)
69 warn_elem(e
, "refers to source zone with different family");
73 if (r
->_dest
&& r
->_dest
->family
&& r
->_dest
->family
!= r
->family
)
75 warn_elem(e
, "refers to destination zone with different family");
79 if (r
->_ipset
&& r
->_ipset
->family
&& r
->_ipset
->family
!= r
->family
)
81 warn_elem(e
, "refers to ipset with different family");
85 if (r
->ip_src
.family
&& r
->ip_src
.family
!= r
->family
)
87 warn_elem(e
, "uses source ip with different family");
91 if (r
->ip_dest
.family
&& r
->ip_dest
.family
!= r
->family
)
93 warn_elem(e
, "uses destination ip with different family");
97 if (r
->ip_redir
.family
&& r
->ip_redir
.family
!= r
->family
)
99 warn_elem(e
, "uses redirect ip with different family");
107 fw3_load_redirects(struct fw3_state
*state
, struct uci_package
*p
)
109 struct uci_section
*s
;
110 struct uci_element
*e
;
111 struct fw3_redirect
*redir
;
115 INIT_LIST_HEAD(&state
->redirects
);
117 uci_foreach_element(&p
->sections
, e
)
119 s
= uci_to_section(e
);
121 if (strcmp(s
->type
, "redirect"))
124 redir
= malloc(sizeof(*redir
));
129 memset(redir
, 0, sizeof(*redir
));
131 INIT_LIST_HEAD(&redir
->proto
);
132 INIT_LIST_HEAD(&redir
->mac_src
);
134 redir
->reflection
= true;
136 fw3_parse_options(redir
, fw3_redirect_opts
, s
);
138 if (redir
->src
.invert
)
140 warn_elem(e
, "must not have an inverted source");
141 fw3_free_redirect(redir
);
144 else if (redir
->src
.set
&& !redir
->src
.any
&&
145 !(redir
->_src
= fw3_lookup_zone(state
, redir
->src
.name
, false)))
147 warn_elem(e
, "refers to not existing zone '%s'", redir
->src
.name
);
148 fw3_free_redirect(redir
);
151 else if (redir
->dest
.set
&& !redir
->dest
.any
&&
152 !(redir
->_dest
= fw3_lookup_zone(state
, redir
->dest
.name
, false)))
154 warn_elem(e
, "refers to not existing zone '%s'", redir
->dest
.name
);
155 fw3_free_redirect(redir
);
158 else if (redir
->ipset
.set
&& state
->disable_ipsets
)
160 warn_elem(e
, "skipped due to disabled ipset support");
161 fw3_free_redirect(redir
);
164 else if (redir
->ipset
.set
&& !redir
->ipset
.any
&&
165 !(redir
->_ipset
= fw3_lookup_ipset(state
, redir
->ipset
.name
, false)))
167 warn_elem(e
, "refers to unknown ipset '%s'", redir
->ipset
.name
);
168 fw3_free_redirect(redir
);
172 if (!check_families(e
, redir
))
174 fw3_free_redirect(redir
);
178 if (redir
->target
== FW3_TARGET_UNSPEC
)
180 warn_elem(e
, "has no target specified, defaulting to DNAT");
181 redir
->target
= FW3_TARGET_DNAT
;
183 else if (redir
->target
< FW3_TARGET_DNAT
)
185 warn_elem(e
, "has invalid target specified, defaulting to DNAT");
186 redir
->target
= FW3_TARGET_DNAT
;
189 if (redir
->target
== FW3_TARGET_DNAT
)
192 warn_elem(e
, "must not have source '*' for DNAT target");
193 else if (!redir
->_src
)
194 warn_elem(e
, "has no source specified");
197 setbit(redir
->_src
->dst_flags
, redir
->target
);
198 redir
->_src
->conntrack
= true;
202 if (redir
->reflection
&& redir
->_dest
&& redir
->_src
->masq
)
204 setbit(redir
->_dest
->dst_flags
, FW3_TARGET_ACCEPT
);
205 setbit(redir
->_dest
->dst_flags
, FW3_TARGET_DNAT
);
206 setbit(redir
->_dest
->dst_flags
, FW3_TARGET_SNAT
);
212 warn_elem(e
, "must not have destination '*' for SNAT target");
213 else if (!redir
->_dest
)
214 warn_elem(e
, "has no destination specified");
215 else if (!redir
->ip_dest
.set
)
216 warn_elem(e
, "has no src_dip option specified");
219 setbit(redir
->_dest
->dst_flags
, redir
->target
);
220 redir
->_dest
->conntrack
= true;
227 fw3_free_redirect(redir
);
231 if (!redir
->port_redir
.set
)
232 redir
->port_redir
= redir
->port_dest
;
234 list_add_tail(&redir
->list
, &state
->redirects
);
239 print_chain_nat(struct fw3_redirect
*redir
)
241 if (redir
->target
== FW3_TARGET_DNAT
)
242 fw3_pr("-A zone_%s_prerouting", redir
->src
.name
);
244 fw3_pr("-A zone_%s_postrouting", redir
->dest
.name
);
248 print_snat_dnat(enum fw3_target target
,
249 struct fw3_address
*addr
, struct fw3_port
*port
)
252 char s
[sizeof("255.255.255.255 ")];
254 if (target
== FW3_TARGET_DNAT
)
255 t
= "DNAT --to-destination";
257 t
= "SNAT --to-source";
259 inet_ntop(AF_INET
, &addr
->address
.v4
, s
, sizeof(s
));
261 fw3_pr(" -j %s %s", t
, s
);
263 if (port
&& port
->set
)
265 if (port
->port_min
== port
->port_max
)
266 fw3_pr(":%u", port
->port_min
);
268 fw3_pr(":%u-%u", port
->port_min
, port
->port_max
);
275 print_target_nat(struct fw3_redirect
*redir
)
277 if (redir
->target
== FW3_TARGET_DNAT
)
278 print_snat_dnat(redir
->target
, &redir
->ip_redir
, &redir
->port_redir
);
280 print_snat_dnat(redir
->target
, &redir
->ip_dest
, &redir
->port_dest
);
284 print_chain_filter(struct fw3_redirect
*redir
)
286 if (redir
->target
== FW3_TARGET_DNAT
)
288 /* XXX: check for local ip */
289 if (!redir
->ip_redir
.set
)
290 fw3_pr("-A zone_%s_input", redir
->src
.name
);
292 fw3_pr("-A zone_%s_forward", redir
->src
.name
);
296 if (redir
->src
.set
&& !redir
->src
.any
)
297 fw3_pr("-A zone_%s_forward", redir
->src
.name
);
299 fw3_pr("-A delegate_forward");
304 print_target_filter(struct fw3_redirect
*redir
)
306 /* XXX: check for local ip */
307 if (redir
->target
== FW3_TARGET_DNAT
&& !redir
->ip_redir
.set
)
308 fw3_pr(" -m conntrack --ctstate DNAT -j ACCEPT\n");
310 fw3_pr(" -j ACCEPT\n");
314 print_redirect(enum fw3_table table
, enum fw3_family family
,
315 struct fw3_redirect
*redir
, int num
)
317 struct list_head
*ext_addrs
, *int_addrs
;
318 struct fw3_address
*ext_addr
, *int_addr
;
319 struct fw3_device
*ext_net
, *int_net
;
320 struct fw3_protocol
*proto
;
324 info(" * Redirect '%s'", redir
->name
);
326 info(" * Redirect #%u", num
);
328 if (!fw3_is_family(redir
->_src
, family
) ||
329 !fw3_is_family(redir
->_dest
, family
))
331 info(" ! Skipping due to different family of zone");
335 if (!fw3_is_family(&redir
->ip_src
, family
) ||
336 !fw3_is_family(&redir
->ip_dest
, family
) ||
337 !fw3_is_family(&redir
->ip_redir
, family
))
339 info(" ! Skipping due to different family of ip address");
345 if (!fw3_is_family(redir
->_ipset
, family
))
347 info(" ! Skipping due to different family in ipset");
351 setbit(redir
->_ipset
->flags
, family
);
354 fw3_foreach(proto
, &redir
->proto
)
355 fw3_foreach(mac
, &redir
->mac_src
)
357 if (table
== FW3_TABLE_NAT
)
359 print_chain_nat(redir
);
360 fw3_format_ipset(redir
->_ipset
, redir
->ipset
.invert
);
361 fw3_format_protocol(proto
, family
);
363 if (redir
->target
== FW3_TARGET_DNAT
)
365 fw3_format_src_dest(&redir
->ip_src
, &redir
->ip_dest
);
366 fw3_format_sport_dport(&redir
->port_src
, &redir
->port_dest
);
370 fw3_format_src_dest(&redir
->ip_src
, &redir
->ip_redir
);
371 fw3_format_sport_dport(&redir
->port_src
, &redir
->port_redir
);
375 fw3_format_time(&redir
->time
);
376 fw3_format_extra(redir
->extra
);
377 fw3_format_comment(redir
->name
);
378 print_target_nat(redir
);
380 else if (table
== FW3_TABLE_FILTER
)
382 print_chain_filter(redir
);
383 fw3_format_ipset(redir
->_ipset
, redir
->ipset
.invert
);
384 fw3_format_protocol(proto
, family
);
385 fw3_format_src_dest(&redir
->ip_src
, &redir
->ip_redir
);
386 fw3_format_sport_dport(&redir
->port_src
, &redir
->port_redir
);
388 fw3_format_time(&redir
->time
);
389 fw3_format_extra(redir
->extra
);
390 fw3_format_comment(redir
->name
);
391 print_target_filter(redir
);
395 /* reflection rules */
396 if (redir
->target
!= FW3_TARGET_DNAT
|| !redir
->reflection
)
399 if (!redir
->_dest
|| !redir
->_src
->masq
)
402 list_for_each_entry(ext_net
, &redir
->_src
->networks
, list
)
404 ext_addrs
= fw3_ubus_address(ext_net
->name
);
406 if (!ext_addrs
|| list_empty(ext_addrs
))
409 list_for_each_entry(int_net
, &redir
->_dest
->networks
, list
)
411 int_addrs
= fw3_ubus_address(int_net
->name
);
413 if (!int_addrs
|| list_empty(int_addrs
))
416 fw3_foreach(ext_addr
, ext_addrs
)
417 fw3_foreach(int_addr
, int_addrs
)
418 fw3_foreach(proto
, &redir
->proto
)
420 if (!fw3_is_family(int_addr
, family
) ||
421 !fw3_is_family(ext_addr
, family
))
424 if (!proto
|| (proto
->protocol
!= 6 && proto
->protocol
!= 17))
429 if (table
== FW3_TABLE_NAT
)
431 fw3_pr("-A zone_%s_prerouting", redir
->dest
.name
);
432 fw3_format_protocol(proto
, family
);
433 fw3_format_src_dest(int_addr
, ext_addr
);
434 fw3_format_sport_dport(NULL
, &redir
->port_dest
);
435 fw3_format_time(&redir
->time
);
436 fw3_format_comment(redir
->name
, " (reflection)");
437 print_snat_dnat(FW3_TARGET_DNAT
,
438 &redir
->ip_redir
, &redir
->port_redir
);
440 fw3_pr("-A zone_%s_postrouting", redir
->dest
.name
);
441 fw3_format_protocol(proto
, family
);
442 fw3_format_src_dest(int_addr
, &redir
->ip_redir
);
443 fw3_format_sport_dport(NULL
, &redir
->port_redir
);
444 fw3_format_time(&redir
->time
);
445 fw3_format_comment(redir
->name
, " (reflection)");
446 print_snat_dnat(FW3_TARGET_SNAT
, ext_addr
, NULL
);
448 else if (table
== FW3_TABLE_FILTER
)
450 fw3_pr("-A zone_%s_forward", redir
->dest
.name
);
451 fw3_format_protocol(proto
, family
);
452 fw3_format_src_dest(int_addr
, &redir
->ip_redir
);
453 fw3_format_sport_dport(NULL
, &redir
->port_redir
);
454 fw3_format_time(&redir
->time
);
455 fw3_format_comment(redir
->name
, " (reflection)");
456 fw3_pr(" -j zone_%s_dest_ACCEPT\n", redir
->dest
.name
);
460 fw3_ubus_address_free(int_addrs
);
463 fw3_ubus_address_free(ext_addrs
);
468 fw3_print_redirects(enum fw3_table table
, enum fw3_family family
,
469 struct fw3_state
*state
)
472 struct fw3_redirect
*redir
;
474 if (family
== FW3_FAMILY_V6
)
477 if (table
!= FW3_TABLE_FILTER
&& table
!= FW3_TABLE_NAT
)
480 list_for_each_entry(redir
, &state
->redirects
, list
)
481 print_redirect(table
, family
, redir
, num
++);