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6178953b | 1 | #!/usr/bin/perl -w |
2a81ab0d AM |
2 | ############################################################################### |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5bee9a9d | 5 | # Copyright (C) 2013 Alexander Marx <amarx@ipfire.org> # |
2a81ab0d AM |
6 | # # |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
2a81ab0d | 21 | |
2a81ab0d | 22 | use strict; |
2a81ab0d | 23 | |
97ab0569 MT |
24 | require '/var/ipfire/general-functions.pl'; |
25 | require "${General::swroot}/lang.pl"; | |
26 | require "/usr/lib/firewall/firewall-lib.pl"; | |
2a81ab0d | 27 | |
68d1eb10 MT |
28 | # Set to one to enable debugging mode. |
29 | my $DEBUG = 0; | |
30 | ||
1f9e7b53 MT |
31 | my $IPTABLES = "iptables --wait"; |
32 | ||
6178953b | 33 | # iptables chains |
8f4f4634 MT |
34 | my $CHAIN_INPUT = "INPUTFW"; |
35 | my $CHAIN_FORWARD = "FORWARDFW"; | |
d98aa95a | 36 | my $CHAIN_OUTPUT = "OUTGOINGFW"; |
8f4f4634 | 37 | my $CHAIN = $CHAIN_FORWARD; |
6178953b MT |
38 | my $CHAIN_NAT_SOURCE = "NAT_SOURCE"; |
39 | my $CHAIN_NAT_DESTINATION = "NAT_DESTINATION"; | |
6e87f0aa | 40 | my $CHAIN_MANGLE_NAT_DESTINATION_FIX = "NAT_DESTINATION"; |
8f4f4634 MT |
41 | my @VALID_CHAINS = ($CHAIN_INPUT, $CHAIN_FORWARD, $CHAIN_OUTPUT); |
42 | ||
43 | my @PROTOCOLS = ("tcp", "udp", "icmp", "igmp", "ah", "esp", "gre", "ipv6", "ipip"); | |
44 | my @PROTOCOLS_WITH_PORTS = ("tcp", "udp"); | |
45 | ||
46 | my @VALID_TARGETS = ("ACCEPT", "DROP", "REJECT"); | |
6178953b | 47 | |
2a81ab0d AM |
48 | my %fwdfwsettings=(); |
49 | my %defaultNetworks=(); | |
8f4f4634 | 50 | my %configfwdfw=();; |
2a81ab0d | 51 | my %customgrp=(); |
2a81ab0d | 52 | my %configinputfw=(); |
5d7faa45 | 53 | my %configoutgoingfw=(); |
a6edca5a | 54 | my %confignatfw=(); |
2a81ab0d | 55 | my %aliases=(); |
36196d0d | 56 | my @p2ps=(); |
2a81ab0d | 57 | |
6d8eb5de AM |
58 | my $configfwdfw = "${General::swroot}/firewall/config"; |
59 | my $configinput = "${General::swroot}/firewall/input"; | |
60 | my $configoutgoing = "${General::swroot}/firewall/outgoing"; | |
61 | my $p2pfile = "${General::swroot}/firewall/p2protocols"; | |
2a81ab0d | 62 | my $configgrp = "${General::swroot}/fwhosts/customgroups"; |
210ee67b | 63 | my $netsettings = "${General::swroot}/ethernet/settings"; |
86a921ee | 64 | |
6d8eb5de | 65 | &General::readhash("${General::swroot}/firewall/settings", \%fwdfwsettings); |
210ee67b | 66 | &General::readhash("$netsettings", \%defaultNetworks); |
2a81ab0d AM |
67 | &General::readhasharray($configfwdfw, \%configfwdfw); |
68 | &General::readhasharray($configinput, \%configinputfw); | |
5d7faa45 | 69 | &General::readhasharray($configoutgoing, \%configoutgoingfw); |
2a81ab0d AM |
70 | &General::readhasharray($configgrp, \%customgrp); |
71 | &General::get_aliases(\%aliases); | |
72 | ||
8531b94a MT |
73 | # MAIN |
74 | &main(); | |
75 | ||
76 | sub main { | |
77 | # Flush all chains. | |
78 | &flush(); | |
79 | ||
80 | # Reload firewall rules. | |
81 | &preparerules(); | |
82 | ||
83 | # Load P2P block rules. | |
84 | &p2pblock(); | |
85 | ||
86 | # Reload firewall policy. | |
87 | run("/usr/sbin/firewall-policy"); | |
2a81ab0d | 88 | } |
97ab0569 | 89 | |
68d1eb10 MT |
90 | sub run { |
91 | # Executes or prints the given shell command. | |
92 | my $command = shift; | |
93 | ||
94 | if ($DEBUG) { | |
95 | print "$command\n"; | |
96 | } else { | |
97 | system "$command"; | |
6e87f0aa MT |
98 | |
99 | if ($?) { | |
100 | print_error("ERROR: $command"); | |
101 | } | |
68d1eb10 MT |
102 | } |
103 | } | |
104 | ||
6178953b MT |
105 | sub print_error { |
106 | my $message = shift; | |
107 | ||
108 | print STDERR "$message\n"; | |
109 | } | |
110 | ||
8f4f4634 MT |
111 | sub print_rule { |
112 | my $hash = shift; | |
113 | ||
114 | print "\nRULE:"; | |
115 | ||
116 | my $i = 0; | |
117 | foreach (@$hash) { | |
118 | printf(" %2d: %s", $i++, $_); | |
119 | } | |
120 | print "\n"; | |
121 | } | |
122 | ||
97ab0569 | 123 | sub flush { |
d98aa95a MT |
124 | run("$IPTABLES -F $CHAIN_INPUT"); |
125 | run("$IPTABLES -F $CHAIN_FORWARD"); | |
126 | run("$IPTABLES -F $CHAIN_OUTPUT"); | |
127 | run("$IPTABLES -t nat -F $CHAIN_NAT_SOURCE"); | |
128 | run("$IPTABLES -t nat -F $CHAIN_NAT_DESTINATION"); | |
6e87f0aa | 129 | run("$IPTABLES -t mangle -F $CHAIN_MANGLE_NAT_DESTINATION_FIX"); |
86a921ee | 130 | } |
97ab0569 MT |
131 | |
132 | sub preparerules { | |
6d8eb5de | 133 | if (! -z "${General::swroot}/firewall/config"){ |
2a81ab0d AM |
134 | &buildrules(\%configfwdfw); |
135 | } | |
6d8eb5de | 136 | if (! -z "${General::swroot}/firewall/input"){ |
2a81ab0d AM |
137 | &buildrules(\%configinputfw); |
138 | } | |
6d8eb5de | 139 | if (! -z "${General::swroot}/firewall/outgoing"){ |
5d7faa45 AM |
140 | &buildrules(\%configoutgoingfw); |
141 | } | |
2a81ab0d | 142 | } |
97ab0569 MT |
143 | |
144 | sub buildrules { | |
8f4f4634 MT |
145 | my $hash = shift; |
146 | ||
147 | foreach my $key (sort {$a <=> $b} keys %$hash) { | |
148 | # Skip disabled rules. | |
149 | next unless ($$hash{$key}[2] eq 'ON'); | |
150 | ||
151 | if ($DEBUG) { | |
152 | print_rule($$hash{$key}); | |
153 | } | |
154 | ||
155 | # Check if the target is valid. | |
156 | my $target = $$hash{$key}[0]; | |
157 | if (!$target ~~ @VALID_TARGETS) { | |
158 | print_error("Invalid target '$target' for rule $key"); | |
159 | next; | |
160 | } | |
161 | ||
162 | # Check if the chain is valid. | |
163 | my $chain = $$hash{$key}[1]; | |
164 | if (!$chain ~~ @VALID_CHAINS) { | |
165 | print_error("Invalid chain '$chain' in rule $key"); | |
166 | next; | |
167 | } | |
168 | ||
169 | # Collect all sources. | |
170 | my @sources = &get_addresses($hash, $key, "src"); | |
171 | ||
172 | # Collect all destinations. | |
173 | my @destinations = &get_addresses($hash, $key, "tgt"); | |
6178953b | 174 | |
6178953b | 175 | # Check if logging should be enabled. |
8f4f4634 | 176 | my $LOG = ($$hash{$key}[17] eq 'ON'); |
6178953b | 177 | |
8f4f4634 MT |
178 | # Check if NAT is enabled and initialize variables, that we use for that. |
179 | my $NAT = ($$hash{$key}[28] eq 'ON'); | |
6178953b | 180 | my $NAT_MODE; |
8f4f4634 MT |
181 | if ($NAT) { |
182 | $NAT_MODE = uc($$hash{$key}[31]); | |
183 | } | |
6178953b | 184 | |
8f4f4634 MT |
185 | # Set up time constraints. |
186 | my @time_options = (); | |
187 | if ($$hash{$key}[18] eq 'ON') { | |
188 | push(@time_options, ("-m", "time")); | |
6178953b | 189 | |
8f4f4634 MT |
190 | # Select all days of the week this match is active. |
191 | my @weekdays = (); | |
192 | if ($$hash{$key}[19] ne '') { | |
193 | push (@weekdays, "Mon"); | |
194 | } | |
195 | if ($$hash{$key}[20] ne '') { | |
196 | push (@weekdays, "Tue"); | |
197 | } | |
198 | if ($$hash{$key}[21] ne '') { | |
199 | push (@weekdays, "Wed"); | |
200 | } | |
201 | if ($$hash{$key}[22] ne '') { | |
202 | push (@weekdays, "Thu"); | |
203 | } | |
204 | if ($$hash{$key}[23] ne '') { | |
205 | push (@weekdays, "Fri"); | |
206 | } | |
207 | if ($$hash{$key}[24] ne '') { | |
208 | push (@weekdays, "Sat"); | |
209 | } | |
210 | if ($$hash{$key}[25] ne '') { | |
211 | push (@weekdays, "Sun"); | |
212 | } | |
213 | if (@weekdays) { | |
214 | push(@time_options, ("--weekdays", join(",", @weekdays))); | |
215 | } | |
6178953b | 216 | |
8f4f4634 MT |
217 | # Convert start time. |
218 | my $time_start = &format_time($$hash{$key}[26]); | |
219 | if ($time_start) { | |
220 | push(@time_options, ("--timestart", $time_start)); | |
a6edca5a | 221 | } |
6178953b | 222 | |
8f4f4634 MT |
223 | # Convert end time. |
224 | my $time_stop = &format_time($$hash{$key}[27]); | |
225 | if ($time_stop) { | |
226 | push(@time_options, ("--timestop", $time_stop)); | |
227 | } | |
a6edca5a | 228 | } |
6178953b | 229 | |
8f4f4634 MT |
230 | # Check which protocols are used in this rule and so that we can |
231 | # later group rules by protocols. | |
232 | my @protocols = &get_protocols($hash, $key); | |
233 | if (!@protocols) { | |
234 | print_error("Invalid protocol configuration for rule $key"); | |
235 | next; | |
236 | } | |
237 | ||
238 | foreach my $protocol (@protocols) { | |
239 | # Check if the given protocol is supported. | |
240 | if (($protocol ne "all") && (!$protocol ~~ @PROTOCOLS)) { | |
241 | print_error("Protocol $protocol is not supported (rule $key)"); | |
242 | next; | |
2a81ab0d | 243 | } |
8f4f4634 MT |
244 | |
245 | # Prepare protocol options (like ICMP types, ports, etc...). | |
246 | my @protocol_options = &get_protocol_options($hash, $key, $protocol); | |
247 | ||
248 | # Check if this protocol knows ports. | |
249 | my $protocol_has_ports = ($protocol ~~ @PROTOCOLS_WITH_PORTS); | |
250 | ||
251 | foreach my $source (@sources) { | |
252 | foreach my $destination (@destinations) { | |
253 | # Skip invalid rules. | |
254 | next if (!$source || !$destination || ($destination eq "none")); | |
255 | ||
256 | # Array with iptables arguments. | |
257 | my @options = (); | |
258 | ||
259 | # Append protocol. | |
260 | if ($protocol ne "all") { | |
261 | push(@options, ("-p", $protocol)); | |
262 | push(@options, @protocol_options); | |
2a81ab0d | 263 | } |
8f4f4634 | 264 | |
6e87f0aa MT |
265 | # Prepare source options. |
266 | my @source_options = (); | |
8f4f4634 | 267 | if ($source =~ /mac/) { |
6e87f0aa | 268 | push(@source_options, $source); |
8f4f4634 | 269 | } else { |
6e87f0aa | 270 | push(@source_options, ("-s", $source)); |
2a81ab0d | 271 | } |
14f7cb87 | 272 | |
6e87f0aa MT |
273 | # Prepare destination options. |
274 | my @destination_options = ("-d", $destination); | |
14f7cb87 | 275 | |
8f4f4634 MT |
276 | # Add time constraint options. |
277 | push(@options, @time_options); | |
14f7cb87 | 278 | |
8f4f4634 MT |
279 | # Process NAT rules. |
280 | if ($NAT) { | |
281 | my $nat_address = &get_nat_address($$hash{$key}[29]); | |
b05ec50a | 282 | |
8f4f4634 MT |
283 | # Skip NAT rules if the NAT address is unknown |
284 | # (i.e. no internet connection has been established, yet). | |
285 | next unless ($nat_address); | |
b05ec50a | 286 | |
8f4f4634 MT |
287 | # Destination NAT |
288 | if ($NAT_MODE eq "DNAT") { | |
6e87f0aa MT |
289 | # Make port-forwardings useable from the internal networks. |
290 | &add_dnat_mangle_rules($nat_address, @options); | |
b05ec50a | 291 | |
8f4f4634 | 292 | my @nat_options = @options; |
6e87f0aa | 293 | push(@nat_options, @source_options); |
8f4f4634 | 294 | push(@nat_options, ("-d", $nat_address)); |
6e87f0aa MT |
295 | |
296 | my ($dnat_address, $dnat_mask) = split("/", $destination); | |
297 | @destination_options = ("-d", $dnat_address); | |
b05ec50a | 298 | |
8f4f4634 MT |
299 | if ($protocol_has_ports) { |
300 | my $dnat_port = &get_dnat_target_port($hash, $key); | |
b05ec50a | 301 | |
8f4f4634 MT |
302 | if ($dnat_port) { |
303 | $dnat_address .= ":$dnat_port"; | |
86a921ee | 304 | } |
2a81ab0d | 305 | } |
8f4f4634 MT |
306 | |
307 | if ($LOG) { | |
824dc936 | 308 | run("$IPTABLES -t nat -A $CHAIN_NAT_DESTINATION @nat_options -j LOG --log-prefix 'DNAT '"); |
8f4f4634 MT |
309 | } |
310 | run("$IPTABLES -t nat -A $CHAIN_NAT_DESTINATION @nat_options -j DNAT --to-destination $dnat_address"); | |
311 | ||
312 | # Source NAT | |
313 | } elsif ($NAT_MODE eq "SNAT") { | |
6e87f0aa MT |
314 | my @nat_options = @options; |
315 | ||
316 | push(@nat_options, @source_options); | |
317 | push(@nat_options, @destination_options); | |
318 | ||
8f4f4634 | 319 | if ($LOG) { |
824dc936 | 320 | run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options -j LOG --log-prefix 'SNAT '"); |
8f4f4634 | 321 | } |
6e87f0aa | 322 | run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options -j SNAT --to-source $nat_address"); |
2a81ab0d AM |
323 | } |
324 | } | |
8f4f4634 | 325 | |
6e87f0aa MT |
326 | push(@options, @source_options); |
327 | push(@options, @destination_options); | |
328 | ||
8f4f4634 MT |
329 | # Insert firewall rule. |
330 | if ($LOG && !$NAT) { | |
331 | run("$IPTABLES -A $chain @options -j LOG"); | |
332 | } | |
333 | run("$IPTABLES -A $chain @options -j $target"); | |
2a81ab0d AM |
334 | } |
335 | } | |
336 | } | |
2a81ab0d AM |
337 | } |
338 | } | |
97ab0569 | 339 | |
8f4f4634 MT |
340 | sub get_external_interface() { |
341 | open(IFACE, "/var/ipfire/red/iface") or return ""; | |
342 | my $iface = <IFACE>; | |
343 | close(IFACE); | |
344 | ||
345 | return $iface; | |
346 | } | |
347 | ||
348 | sub get_external_address() { | |
349 | open(ADDR, "/var/ipfire/red/local-ipaddress") or return ""; | |
350 | my $address = <ADDR>; | |
351 | close(ADDR); | |
352 | ||
353 | return $address; | |
354 | } | |
355 | ||
356 | sub get_alias { | |
357 | my $id = shift; | |
358 | ||
359 | foreach my $alias (sort keys %aliases) { | |
360 | if ($id eq $alias) { | |
361 | return $aliases{$alias}; | |
a6edca5a AM |
362 | } |
363 | } | |
8f4f4634 MT |
364 | } |
365 | ||
366 | sub get_nat_address { | |
367 | my $zone = shift; | |
368 | ||
369 | # Any static address of any zone. | |
370 | if ($zone eq "RED" || $zone eq "GREEN" || $zone eq "ORANGE" || $zone eq "BLUE") { | |
371 | return $defaultNetworks{$zone . "_ADDRESS"}; | |
372 | ||
373 | } elsif ($zone eq "Default IP") { | |
374 | return &get_external_address(); | |
375 | ||
376 | } else { | |
377 | return &get_alias($zone); | |
378 | } | |
379 | ||
380 | print_error("Could not find NAT address"); | |
a6edca5a | 381 | } |
97ab0569 | 382 | |
b05ec50a MT |
383 | # Formats the given timestamp into the iptables format which is "hh:mm" UTC. |
384 | sub format_time { | |
385 | my $val = shift; | |
386 | ||
387 | # Convert the given time into minutes. | |
388 | my $minutes = &time_convert_to_minutes($val); | |
389 | ||
390 | # Move the timestamp into UTC. | |
391 | $minutes += &time_utc_offset(); | |
392 | ||
393 | # Make sure $minutes is between 00:00 and 23:59. | |
394 | if ($minutes < 0) { | |
395 | $minutes += 1440; | |
396 | } | |
397 | ||
398 | if ($minutes > 1440) { | |
399 | $minutes -= 1440; | |
400 | } | |
401 | ||
402 | # Format as hh:mm. | |
403 | return sprintf("%02d:%02d", $minutes / 60, $minutes % 60); | |
472136c9 | 404 | } |
97ab0569 | 405 | |
b05ec50a MT |
406 | # Calculates the offsets in minutes from the local timezone to UTC. |
407 | sub time_utc_offset { | |
408 | my @localtime = localtime(time); | |
409 | my @gmtime = gmtime(time); | |
410 | ||
411 | return ($gmtime[2] * 60 + $gmtime[1] % 60) - ($localtime[2] * 60 + $localtime[1] % 60); | |
472136c9 | 412 | } |
97ab0569 | 413 | |
b05ec50a MT |
414 | # Takes a timestamp like "14:00" and converts it into minutes since midnight. |
415 | sub time_convert_to_minutes { | |
416 | my ($hrs, $min) = split(":", shift); | |
417 | ||
418 | return ($hrs * 60) + $min; | |
472136c9 | 419 | } |
97ab0569 MT |
420 | |
421 | sub p2pblock { | |
6178953b | 422 | my $P2PSTRING = ""; |
36196d0d AM |
423 | my $DO; |
424 | open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile"; | |
425 | @p2ps = <FILE>; | |
426 | close FILE; | |
427 | my $CMD = "-m ipp2p"; | |
428 | foreach my $p2pentry (sort @p2ps) { | |
429 | my @p2pline = split( /\;/, $p2pentry ); | |
8d1beadc AM |
430 | if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) { |
431 | $DO = "ACCEPT"; | |
5238a871 | 432 | if ("$p2pline[2]" eq "on") { |
36196d0d AM |
433 | $P2PSTRING = "$P2PSTRING --$p2pline[1]"; |
434 | } | |
8d1beadc | 435 | }else { |
36196d0d | 436 | $DO = "RETURN"; |
5238a871 | 437 | if ("$p2pline[2]" eq "off") { |
36196d0d AM |
438 | $P2PSTRING = "$P2PSTRING --$p2pline[1]"; |
439 | } | |
440 | } | |
441 | } | |
68d1eb10 MT |
442 | |
443 | if($P2PSTRING) { | |
1f9e7b53 | 444 | run("$IPTABLES -A FORWARDFW $CMD $P2PSTRING -j $DO"); |
36196d0d AM |
445 | } |
446 | } | |
97ab0569 | 447 | |
8f4f4634 MT |
448 | sub get_addresses { |
449 | my $hash = shift; | |
450 | my $key = shift; | |
451 | my $type = shift; | |
452 | ||
453 | my @addresses = (); | |
454 | my $addr_type; | |
455 | my $value; | |
456 | my $group_name; | |
457 | ||
458 | if ($type eq "src") { | |
459 | $addr_type = $$hash{$key}[3]; | |
460 | $value = $$hash{$key}[4]; | |
461 | ||
462 | } elsif ($type eq "tgt") { | |
463 | $addr_type = $$hash{$key}[5]; | |
464 | $value = $$hash{$key}[6]; | |
465 | } | |
466 | ||
467 | if ($addr_type ~~ ["cust_grp_src", "cust_grp_tgt"]) { | |
468 | foreach my $grp (sort {$a <=> $b} keys %customgrp) { | |
469 | if ($customgrp{$grp}[0] eq $value) { | |
470 | my @address = &get_address($customgrp{$grp}[3], $customgrp{$grp}[2], $type); | |
471 | ||
472 | if (@address) { | |
473 | push(@addresses, @address); | |
474 | } | |
475 | } | |
476 | } | |
477 | } else { | |
478 | my @address = &get_address($addr_type, $value, $type); | |
479 | ||
480 | if (@address) { | |
481 | push(@addresses, @address); | |
482 | } | |
2a81ab0d | 483 | } |
8f4f4634 MT |
484 | |
485 | return @addresses; | |
486 | } | |
487 | ||
488 | sub get_address { | |
489 | my $key = shift; | |
490 | my $value = shift; | |
491 | my $type = shift; | |
492 | ||
493 | my @ret = (); | |
494 | ||
495 | # If the user manually typed an address, we just check if it is a MAC | |
496 | # address. Otherwise, we assume that it is an IP address. | |
497 | if ($key ~~ ["src_addr", "tgt_addr"]) { | |
498 | if (&General::validmac($value)) { | |
499 | push(@ret, "-m mac --mac-source $value"); | |
500 | } else { | |
501 | push(@ret, $value); | |
502 | } | |
503 | ||
504 | # If a default network interface (GREEN, BLUE, etc.) is selected, we | |
505 | # try to get the corresponding address of the network. | |
506 | } elsif ($key ~~ ["std_net_src", "std_net_tgt", "Standard Network"]) { | |
507 | my $external_interface = &get_external_interface(); | |
508 | ||
509 | my $network_address = &fwlib::get_std_net_ip($value, $external_interface); | |
510 | if ($network_address) { | |
511 | push(@ret, $network_address); | |
b5269091 | 512 | } |
8f4f4634 MT |
513 | |
514 | # Custom networks. | |
515 | } elsif ($key ~~ ["cust_net_src", "cust_net_tgt", "Custom Network"]) { | |
516 | my $network_address = &fwlib::get_net_ip($value); | |
517 | if ($network_address) { | |
518 | push(@ret, $network_address); | |
a0fb1099 | 519 | } |
8f4f4634 MT |
520 | |
521 | # Custom hosts. | |
522 | } elsif ($key ~~ ["cust_host_src", "cust_host_tgt", "Custom Host"]) { | |
523 | my $host_address = &fwlib::get_host_ip($value, $type); | |
524 | if ($host_address) { | |
525 | push(@ret, $host_address); | |
a0fb1099 | 526 | } |
8f4f4634 MT |
527 | |
528 | # OpenVPN networks. | |
529 | } elsif ($key ~~ ["ovpn_net_src", "ovpn_net_tgt", "OpenVPN static network"]) { | |
530 | my $network_address = &fwlib::get_ovpn_net_ip($value, 1); | |
531 | if ($network_address) { | |
532 | push(@ret, $network_address); | |
a0fb1099 | 533 | } |
8f4f4634 MT |
534 | |
535 | # OpenVPN hosts. | |
536 | } elsif ($key ~~ ["ovpn_host_src", "ovpn_host_tgt", "OpenVPN static host"]) { | |
537 | my $host_address = &fwlib::get_ovpn_host_ip($value, 33); | |
538 | if ($host_address) { | |
539 | push(@ret, $host_address); | |
a0fb1099 | 540 | } |
8f4f4634 MT |
541 | |
542 | # OpenVPN N2N. | |
543 | } elsif ($key ~~ ["ovpn_n2n_src", "ovpn_n2n_tgt", "OpenVPN N-2-N"]) { | |
544 | my $network_address = &fwlib::get_ovpn_n2n_ip($value, 11); | |
545 | if ($network_address) { | |
546 | push(@ret, $network_address); | |
547 | } | |
548 | ||
549 | # IPsec networks. | |
550 | } elsif ($key ~~ ["ipsec_net_src", "ipsec_net_tgt", "IpSec Network"]) { | |
551 | my $network_address = &fwlib::get_ipsec_net_ip($value, 11); | |
552 | if ($network_address) { | |
553 | push(@ret, $network_address); | |
554 | } | |
555 | ||
556 | # The firewall's own IP addresses. | |
557 | } elsif ($key ~~ ["ipfire", "ipfire_src"]) { | |
558 | # ALL | |
559 | if ($value eq "ALL") { | |
560 | push(@ret, "0/0"); | |
561 | ||
562 | # GREEN | |
563 | } elsif ($value eq "GREEN") { | |
564 | push(@ret, $defaultNetworks{"GREEN_ADDRESS"}); | |
565 | ||
566 | # BLUE | |
567 | } elsif ($value eq "BLUE") { | |
568 | push(@ret, $defaultNetworks{"BLUE_ADDRESS"}); | |
569 | ||
570 | # ORANGE | |
571 | } elsif ($value eq "ORANGE") { | |
572 | push(@ret, $defaultNetworks{"ORANGE_ADDRESS"}); | |
573 | ||
574 | # RED | |
575 | } elsif ($value ~~ ["RED", "RED1"]) { | |
576 | my $address = &get_external_address(); | |
577 | if ($address) { | |
578 | push(@ret, $address); | |
579 | } | |
580 | ||
581 | # Aliases | |
582 | } else { | |
583 | my %alias = &get_alias($value); | |
584 | if (%alias) { | |
585 | push(@ret, $alias{"IPT"}); | |
a0fb1099 AM |
586 | } |
587 | } | |
8f4f4634 MT |
588 | |
589 | # If nothing was selected, we assume "any". | |
590 | } else { | |
591 | push(@ret, "0/0"); | |
2a81ab0d | 592 | } |
8f4f4634 MT |
593 | |
594 | return @ret; | |
2a81ab0d | 595 | } |
97ab0569 | 596 | |
8f4f4634 MT |
597 | sub get_protocols { |
598 | my $hash = shift; | |
599 | my $key = shift; | |
600 | ||
601 | my $uses_source_ports = ($$hash{$key}[7] eq "ON"); | |
602 | my $uses_services = ($$hash{$key}[11] eq "ON"); | |
603 | ||
604 | my @protocols = (); | |
605 | ||
606 | # Rules which don't have source ports or services (like ICMP, ESP, ...). | |
607 | if (!$uses_source_ports && !$uses_services) { | |
608 | push(@protocols, $$hash{$key}[8]); | |
609 | ||
610 | # Rules which either use ports or services. | |
611 | } elsif ($uses_source_ports || $uses_services) { | |
612 | # Check if service group or service | |
613 | if ($$hash{$key}[14] eq 'cust_srv') { | |
614 | push(@protocols, &fwlib::get_srv_prot($$hash{$key}[15])); | |
615 | ||
616 | } elsif($$hash{$key}[14] eq 'cust_srvgrp'){ | |
617 | my $protos = &fwlib::get_srvgrp_prot($$hash{$key}[15]); | |
618 | push(@protocols, split(",", $protos)); | |
619 | ||
620 | } else { | |
621 | # Fetch the protocol for this rule. | |
622 | my $protocol = lc($$hash{$key}[8]); | |
623 | ||
624 | # Fetch source and destination ports for this rule. | |
625 | my $source_ports = $$hash{$key}[10]; | |
626 | my $destination_ports = $$hash{$key}[15]; | |
627 | ||
628 | # Check if ports are set for protocols which do not support ports. | |
629 | if (!($protocol ~~ @PROTOCOLS_WITH_PORTS) && ($source_ports || $destination_ports)) { | |
630 | print_error("$protocol does not support ports"); | |
631 | return (); | |
632 | } | |
633 | ||
634 | push(@protocols, $protocol); | |
2a81ab0d AM |
635 | } |
636 | } | |
8f4f4634 MT |
637 | |
638 | # Remove all empty elements | |
639 | @protocols = map { $_ ? $_ : () } @protocols; | |
640 | ||
641 | # If no protocol has been defined, we assume "all". | |
642 | if (!@protocols) { | |
643 | push(@protocols, "all"); | |
98cee89f | 644 | } |
8f4f4634 MT |
645 | |
646 | # Make all protocol names lowercase. | |
647 | @protocols = map { lc } @protocols; | |
648 | ||
649 | return @protocols; | |
2a81ab0d | 650 | } |
97ab0569 | 651 | |
8f4f4634 MT |
652 | sub get_protocol_options { |
653 | my $hash = shift; | |
654 | my $key = shift; | |
655 | my $protocol = shift; | |
656 | my @options = (); | |
657 | ||
658 | # Process source ports. | |
659 | my $use_src_ports = ($$hash{$key}[7] eq "ON"); | |
660 | my $src_ports = $$hash{$key}[10]; | |
661 | ||
662 | if ($use_src_ports && $src_ports) { | |
663 | push(@options, &format_ports($src_ports, "src")); | |
664 | } | |
665 | ||
666 | # Process destination ports. | |
667 | my $use_dst_ports = ($$hash{$key}[11] eq "ON"); | |
668 | my $use_dnat = (($$hash{$key}[28] eq "ON") && ($$hash{$key}[31] eq "dnat")); | |
669 | ||
670 | if ($use_dst_ports) { | |
671 | my $dst_ports_mode = $$hash{$key}[14]; | |
672 | my $dst_ports = $$hash{$key}[15]; | |
8f4f4634 MT |
673 | |
674 | if (($dst_ports_mode eq "TGT_PORT") && $dst_ports) { | |
1c3044d7 MT |
675 | if ($use_dnat && $$hash{$key}[30]) { |
676 | $dst_ports = $$hash{$key}[30]; | |
677 | } | |
8f4f4634 MT |
678 | push(@options, &format_ports($dst_ports, "dst")); |
679 | ||
680 | } elsif ($dst_ports_mode eq "cust_srv") { | |
681 | if ($protocol eq "ICMP") { | |
682 | push(@options, ("--icmp-type", &fwlib::get_srv_port($dst_ports, 3, "ICMP"))); | |
683 | } else { | |
684 | $dst_ports = &fwlib::get_srv_port($dst_ports, 1, uc($protocol)); | |
685 | push(@options, &format_ports($dst_ports, "dst")); | |
2a81ab0d | 686 | } |
8f4f4634 MT |
687 | |
688 | } elsif ($dst_ports_mode eq "cust_srvgrp") { | |
689 | push(@options, &fwlib::get_srvgrp_port($dst_ports, uc($protocol))); | |
2a81ab0d AM |
690 | } |
691 | } | |
8f4f4634 MT |
692 | |
693 | # Check if a single ICMP type is selected. | |
694 | if (!$use_src_ports && !$use_dst_ports && $protocol eq "icmp") { | |
695 | my $icmp_type = $$hash{$key}[9]; | |
696 | ||
697 | if (($icmp_type ne "All ICMP-Types") && $icmp_type) { | |
698 | push(@options, ("--icmp-type", $icmp_type)); | |
a4c7bf6b AM |
699 | } |
700 | } | |
8f4f4634 MT |
701 | |
702 | return @options; | |
703 | } | |
704 | ||
705 | sub format_ports { | |
706 | my $ports = shift; | |
707 | my $type = shift; | |
708 | ||
709 | my $arg; | |
710 | if ($type eq "src") { | |
711 | $arg = "--sport"; | |
712 | } elsif ($type eq "dst") { | |
713 | $arg = "--dport"; | |
714 | } | |
715 | ||
716 | my @options = (); | |
717 | ||
718 | if ($ports =~ /\|/) { | |
719 | $ports =~ s/\|/,/g; | |
720 | push(@options, ("-m", "multiport")); | |
721 | } | |
722 | ||
1c3044d7 MT |
723 | if ($ports) { |
724 | push(@options, ($arg, $ports)); | |
725 | } | |
8f4f4634 MT |
726 | |
727 | return @options; | |
728 | } | |
729 | ||
730 | sub get_dnat_target_port { | |
731 | my $hash = shift; | |
732 | my $key = shift; | |
733 | ||
734 | if ($$hash{$key}[14] eq "TGT_PORT") { | |
1c3044d7 MT |
735 | my $port = $$hash{$key}[15]; |
736 | my $external_port = $$hash{$key}[30]; | |
737 | ||
738 | if ($external_port && ($port ne $external_port)) { | |
739 | return $$hash{$key}[15]; | |
740 | } | |
8f4f4634 | 741 | } |
2a81ab0d | 742 | } |
6e87f0aa MT |
743 | |
744 | sub add_dnat_mangle_rules { | |
745 | my $nat_address = shift; | |
746 | my @options = @_; | |
747 | ||
748 | my $mark = 0; | |
749 | foreach my $zone ("GREEN", "BLUE", "ORANGE") { | |
750 | $mark++; | |
751 | ||
752 | # Skip rule if not all required information exists. | |
753 | next unless (exists $defaultNetworks{$zone . "_NETADDRESS"}); | |
754 | next unless (exists $defaultNetworks{$zone . "_NETMASK"}); | |
755 | ||
756 | my @mangle_options = @options; | |
757 | ||
758 | my $netaddress = $defaultNetworks{$zone . "_NETADDRESS"}; | |
759 | $netaddress .= "/" . $defaultNetworks{$zone . "_NETMASK"}; | |
760 | ||
761 | push(@mangle_options, ("-s", $netaddress, "-d", $nat_address)); | |
762 | push(@mangle_options, ("-j", "MARK", "--set-mark", $mark)); | |
763 | ||
764 | run("$IPTABLES -t mangle -A $CHAIN_MANGLE_NAT_DESTINATION_FIX @mangle_options"); | |
765 | } | |
766 | } |