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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"; | |
36 | my $CHAIN_OUTPUT = "OUTPUTFW"; | |
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++, $_); | |
119 | } | |
120 | print "\n"; | |
121 | } | |
122 | ||
97ab0569 | 123 | sub flush { |
1f9e7b53 MT |
124 | run("$IPTABLES -F FORWARDFW"); |
125 | run("$IPTABLES -F INPUTFW"); | |
126 | run("$IPTABLES -F OUTGOINGFW"); | |
127 | run("$IPTABLES -t nat -F NAT_DESTINATION"); | |
128 | run("$IPTABLES -t nat -F NAT_SOURCE"); | |
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 | |
b05ec50a | 175 | my $time_constraints = ""; |
6178953b MT |
176 | |
177 | # Check if logging should be enabled. | |
8f4f4634 | 178 | my $LOG = ($$hash{$key}[17] eq 'ON'); |
6178953b | 179 | |
8f4f4634 MT |
180 | # Check if NAT is enabled and initialize variables, that we use for that. |
181 | my $NAT = ($$hash{$key}[28] eq 'ON'); | |
6178953b | 182 | my $NAT_MODE; |
8f4f4634 MT |
183 | if ($NAT) { |
184 | $NAT_MODE = uc($$hash{$key}[31]); | |
185 | } | |
6178953b | 186 | |
8f4f4634 MT |
187 | # Set up time constraints. |
188 | my @time_options = (); | |
189 | if ($$hash{$key}[18] eq 'ON') { | |
190 | push(@time_options, ("-m", "time")); | |
6178953b | 191 | |
8f4f4634 MT |
192 | # Select all days of the week this match is active. |
193 | my @weekdays = (); | |
194 | if ($$hash{$key}[19] ne '') { | |
195 | push (@weekdays, "Mon"); | |
196 | } | |
197 | if ($$hash{$key}[20] ne '') { | |
198 | push (@weekdays, "Tue"); | |
199 | } | |
200 | if ($$hash{$key}[21] ne '') { | |
201 | push (@weekdays, "Wed"); | |
202 | } | |
203 | if ($$hash{$key}[22] ne '') { | |
204 | push (@weekdays, "Thu"); | |
205 | } | |
206 | if ($$hash{$key}[23] ne '') { | |
207 | push (@weekdays, "Fri"); | |
208 | } | |
209 | if ($$hash{$key}[24] ne '') { | |
210 | push (@weekdays, "Sat"); | |
211 | } | |
212 | if ($$hash{$key}[25] ne '') { | |
213 | push (@weekdays, "Sun"); | |
214 | } | |
215 | if (@weekdays) { | |
216 | push(@time_options, ("--weekdays", join(",", @weekdays))); | |
217 | } | |
6178953b | 218 | |
8f4f4634 MT |
219 | # Convert start time. |
220 | my $time_start = &format_time($$hash{$key}[26]); | |
221 | if ($time_start) { | |
222 | push(@time_options, ("--timestart", $time_start)); | |
a6edca5a | 223 | } |
6178953b | 224 | |
8f4f4634 MT |
225 | # Convert end time. |
226 | my $time_stop = &format_time($$hash{$key}[27]); | |
227 | if ($time_stop) { | |
228 | push(@time_options, ("--timestop", $time_stop)); | |
229 | } | |
a6edca5a | 230 | } |
6178953b | 231 | |
8f4f4634 MT |
232 | # Check which protocols are used in this rule and so that we can |
233 | # later group rules by protocols. | |
234 | my @protocols = &get_protocols($hash, $key); | |
235 | if (!@protocols) { | |
236 | print_error("Invalid protocol configuration for rule $key"); | |
237 | next; | |
238 | } | |
239 | ||
240 | foreach my $protocol (@protocols) { | |
241 | # Check if the given protocol is supported. | |
242 | if (($protocol ne "all") && (!$protocol ~~ @PROTOCOLS)) { | |
243 | print_error("Protocol $protocol is not supported (rule $key)"); | |
244 | next; | |
2a81ab0d | 245 | } |
8f4f4634 MT |
246 | |
247 | # Prepare protocol options (like ICMP types, ports, etc...). | |
248 | my @protocol_options = &get_protocol_options($hash, $key, $protocol); | |
249 | ||
250 | # Check if this protocol knows ports. | |
251 | my $protocol_has_ports = ($protocol ~~ @PROTOCOLS_WITH_PORTS); | |
252 | ||
253 | foreach my $source (@sources) { | |
254 | foreach my $destination (@destinations) { | |
255 | # Skip invalid rules. | |
256 | next if (!$source || !$destination || ($destination eq "none")); | |
257 | ||
258 | # Array with iptables arguments. | |
259 | my @options = (); | |
260 | ||
261 | # Append protocol. | |
262 | if ($protocol ne "all") { | |
263 | push(@options, ("-p", $protocol)); | |
264 | push(@options, @protocol_options); | |
2a81ab0d | 265 | } |
8f4f4634 | 266 | |
6e87f0aa MT |
267 | # Prepare source options. |
268 | my @source_options = (); | |
8f4f4634 | 269 | if ($source =~ /mac/) { |
6e87f0aa | 270 | push(@source_options, $source); |
8f4f4634 | 271 | } else { |
6e87f0aa | 272 | push(@source_options, ("-s", $source)); |
2a81ab0d | 273 | } |
14f7cb87 | 274 | |
6e87f0aa MT |
275 | # Prepare destination options. |
276 | my @destination_options = ("-d", $destination); | |
14f7cb87 | 277 | |
8f4f4634 MT |
278 | # Add time constraint options. |
279 | push(@options, @time_options); | |
14f7cb87 | 280 | |
8f4f4634 MT |
281 | # Process NAT rules. |
282 | if ($NAT) { | |
283 | my $nat_address = &get_nat_address($$hash{$key}[29]); | |
b05ec50a | 284 | |
8f4f4634 MT |
285 | # Skip NAT rules if the NAT address is unknown |
286 | # (i.e. no internet connection has been established, yet). | |
287 | next unless ($nat_address); | |
b05ec50a | 288 | |
8f4f4634 MT |
289 | # Destination NAT |
290 | if ($NAT_MODE eq "DNAT") { | |
6e87f0aa MT |
291 | # Make port-forwardings useable from the internal networks. |
292 | &add_dnat_mangle_rules($nat_address, @options); | |
b05ec50a | 293 | |
8f4f4634 | 294 | my @nat_options = @options; |
6e87f0aa | 295 | push(@nat_options, @source_options); |
8f4f4634 | 296 | push(@nat_options, ("-d", $nat_address)); |
6e87f0aa MT |
297 | |
298 | my ($dnat_address, $dnat_mask) = split("/", $destination); | |
299 | @destination_options = ("-d", $dnat_address); | |
b05ec50a | 300 | |
8f4f4634 MT |
301 | if ($protocol_has_ports) { |
302 | my $dnat_port = &get_dnat_target_port($hash, $key); | |
b05ec50a | 303 | |
8f4f4634 MT |
304 | if ($dnat_port) { |
305 | $dnat_address .= ":$dnat_port"; | |
306 | ||
307 | # Replace --dport with the translated one. | |
6e87f0aa | 308 | my @new_nat_options = (); |
8f4f4634 | 309 | my $skip_count = 0; |
6e87f0aa | 310 | foreach my $option (@nat_options) { |
8f4f4634 MT |
311 | next if ($skip_count-- > 0); |
312 | ||
313 | if ($option eq "--dport") { | |
6e87f0aa | 314 | push(@new_nat_options, ("--dport", $dnat_port)); |
8f4f4634 MT |
315 | $skip_count = 1; |
316 | next; | |
98cee89f | 317 | } |
8f4f4634 | 318 | |
6e87f0aa | 319 | push(@new_nat_options, $option); |
c12392c0 | 320 | } |
6e87f0aa | 321 | @nat_options = @new_nat_options; |
86a921ee | 322 | } |
2a81ab0d | 323 | } |
8f4f4634 MT |
324 | |
325 | if ($LOG) { | |
326 | run("$IPTABLES -t nat -A $CHAIN_NAT_DESTINATION @nat_options -j LOG --log-prefix 'DNAT'"); | |
327 | } | |
328 | run("$IPTABLES -t nat -A $CHAIN_NAT_DESTINATION @nat_options -j DNAT --to-destination $dnat_address"); | |
329 | ||
330 | # Source NAT | |
331 | } elsif ($NAT_MODE eq "SNAT") { | |
6e87f0aa MT |
332 | my @nat_options = @options; |
333 | ||
334 | push(@nat_options, @source_options); | |
335 | push(@nat_options, @destination_options); | |
336 | ||
8f4f4634 | 337 | if ($LOG) { |
6e87f0aa | 338 | run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options -j LOG --log-prefix 'SNAT'"); |
8f4f4634 | 339 | } |
6e87f0aa | 340 | run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options -j SNAT --to-source $nat_address"); |
2a81ab0d AM |
341 | } |
342 | } | |
8f4f4634 | 343 | |
6e87f0aa MT |
344 | push(@options, @source_options); |
345 | push(@options, @destination_options); | |
346 | ||
8f4f4634 MT |
347 | # Insert firewall rule. |
348 | if ($LOG && !$NAT) { | |
349 | run("$IPTABLES -A $chain @options -j LOG"); | |
350 | } | |
351 | run("$IPTABLES -A $chain @options -j $target"); | |
2a81ab0d AM |
352 | } |
353 | } | |
354 | } | |
2a81ab0d AM |
355 | } |
356 | } | |
97ab0569 | 357 | |
8f4f4634 MT |
358 | sub get_external_interface() { |
359 | open(IFACE, "/var/ipfire/red/iface") or return ""; | |
360 | my $iface = <IFACE>; | |
361 | close(IFACE); | |
362 | ||
363 | return $iface; | |
364 | } | |
365 | ||
366 | sub get_external_address() { | |
367 | open(ADDR, "/var/ipfire/red/local-ipaddress") or return ""; | |
368 | my $address = <ADDR>; | |
369 | close(ADDR); | |
370 | ||
371 | return $address; | |
372 | } | |
373 | ||
374 | sub get_alias { | |
375 | my $id = shift; | |
376 | ||
377 | foreach my $alias (sort keys %aliases) { | |
378 | if ($id eq $alias) { | |
379 | return $aliases{$alias}; | |
a6edca5a AM |
380 | } |
381 | } | |
8f4f4634 MT |
382 | } |
383 | ||
384 | sub get_nat_address { | |
385 | my $zone = shift; | |
386 | ||
387 | # Any static address of any zone. | |
388 | if ($zone eq "RED" || $zone eq "GREEN" || $zone eq "ORANGE" || $zone eq "BLUE") { | |
389 | return $defaultNetworks{$zone . "_ADDRESS"}; | |
390 | ||
391 | } elsif ($zone eq "Default IP") { | |
392 | return &get_external_address(); | |
393 | ||
394 | } else { | |
395 | return &get_alias($zone); | |
396 | } | |
397 | ||
398 | print_error("Could not find NAT address"); | |
a6edca5a | 399 | } |
97ab0569 | 400 | |
b05ec50a MT |
401 | # Formats the given timestamp into the iptables format which is "hh:mm" UTC. |
402 | sub format_time { | |
403 | my $val = shift; | |
404 | ||
405 | # Convert the given time into minutes. | |
406 | my $minutes = &time_convert_to_minutes($val); | |
407 | ||
408 | # Move the timestamp into UTC. | |
409 | $minutes += &time_utc_offset(); | |
410 | ||
411 | # Make sure $minutes is between 00:00 and 23:59. | |
412 | if ($minutes < 0) { | |
413 | $minutes += 1440; | |
414 | } | |
415 | ||
416 | if ($minutes > 1440) { | |
417 | $minutes -= 1440; | |
418 | } | |
419 | ||
420 | # Format as hh:mm. | |
421 | return sprintf("%02d:%02d", $minutes / 60, $minutes % 60); | |
472136c9 | 422 | } |
97ab0569 | 423 | |
b05ec50a MT |
424 | # Calculates the offsets in minutes from the local timezone to UTC. |
425 | sub time_utc_offset { | |
426 | my @localtime = localtime(time); | |
427 | my @gmtime = gmtime(time); | |
428 | ||
429 | return ($gmtime[2] * 60 + $gmtime[1] % 60) - ($localtime[2] * 60 + $localtime[1] % 60); | |
472136c9 | 430 | } |
97ab0569 | 431 | |
b05ec50a MT |
432 | # Takes a timestamp like "14:00" and converts it into minutes since midnight. |
433 | sub time_convert_to_minutes { | |
434 | my ($hrs, $min) = split(":", shift); | |
435 | ||
436 | return ($hrs * 60) + $min; | |
472136c9 | 437 | } |
97ab0569 MT |
438 | |
439 | sub p2pblock { | |
6178953b | 440 | my $P2PSTRING = ""; |
36196d0d AM |
441 | my $DO; |
442 | open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile"; | |
443 | @p2ps = <FILE>; | |
444 | close FILE; | |
445 | my $CMD = "-m ipp2p"; | |
446 | foreach my $p2pentry (sort @p2ps) { | |
447 | my @p2pline = split( /\;/, $p2pentry ); | |
8d1beadc AM |
448 | if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) { |
449 | $DO = "ACCEPT"; | |
5238a871 | 450 | if ("$p2pline[2]" eq "on") { |
36196d0d AM |
451 | $P2PSTRING = "$P2PSTRING --$p2pline[1]"; |
452 | } | |
8d1beadc | 453 | }else { |
36196d0d | 454 | $DO = "RETURN"; |
5238a871 | 455 | if ("$p2pline[2]" eq "off") { |
36196d0d AM |
456 | $P2PSTRING = "$P2PSTRING --$p2pline[1]"; |
457 | } | |
458 | } | |
459 | } | |
68d1eb10 MT |
460 | |
461 | if($P2PSTRING) { | |
1f9e7b53 | 462 | run("$IPTABLES -A FORWARDFW $CMD $P2PSTRING -j $DO"); |
36196d0d AM |
463 | } |
464 | } | |
97ab0569 | 465 | |
8f4f4634 MT |
466 | sub get_addresses { |
467 | my $hash = shift; | |
468 | my $key = shift; | |
469 | my $type = shift; | |
470 | ||
471 | my @addresses = (); | |
472 | my $addr_type; | |
473 | my $value; | |
474 | my $group_name; | |
475 | ||
476 | if ($type eq "src") { | |
477 | $addr_type = $$hash{$key}[3]; | |
478 | $value = $$hash{$key}[4]; | |
479 | ||
480 | } elsif ($type eq "tgt") { | |
481 | $addr_type = $$hash{$key}[5]; | |
482 | $value = $$hash{$key}[6]; | |
483 | } | |
484 | ||
485 | if ($addr_type ~~ ["cust_grp_src", "cust_grp_tgt"]) { | |
486 | foreach my $grp (sort {$a <=> $b} keys %customgrp) { | |
487 | if ($customgrp{$grp}[0] eq $value) { | |
488 | my @address = &get_address($customgrp{$grp}[3], $customgrp{$grp}[2], $type); | |
489 | ||
490 | if (@address) { | |
491 | push(@addresses, @address); | |
492 | } | |
493 | } | |
494 | } | |
495 | } else { | |
496 | my @address = &get_address($addr_type, $value, $type); | |
497 | ||
498 | if (@address) { | |
499 | push(@addresses, @address); | |
500 | } | |
2a81ab0d | 501 | } |
8f4f4634 MT |
502 | |
503 | return @addresses; | |
504 | } | |
505 | ||
506 | sub get_address { | |
507 | my $key = shift; | |
508 | my $value = shift; | |
509 | my $type = shift; | |
510 | ||
511 | my @ret = (); | |
512 | ||
513 | # If the user manually typed an address, we just check if it is a MAC | |
514 | # address. Otherwise, we assume that it is an IP address. | |
515 | if ($key ~~ ["src_addr", "tgt_addr"]) { | |
516 | if (&General::validmac($value)) { | |
517 | push(@ret, "-m mac --mac-source $value"); | |
518 | } else { | |
519 | push(@ret, $value); | |
520 | } | |
521 | ||
522 | # If a default network interface (GREEN, BLUE, etc.) is selected, we | |
523 | # try to get the corresponding address of the network. | |
524 | } elsif ($key ~~ ["std_net_src", "std_net_tgt", "Standard Network"]) { | |
525 | my $external_interface = &get_external_interface(); | |
526 | ||
527 | my $network_address = &fwlib::get_std_net_ip($value, $external_interface); | |
528 | if ($network_address) { | |
529 | push(@ret, $network_address); | |
b5269091 | 530 | } |
8f4f4634 MT |
531 | |
532 | # Custom networks. | |
533 | } elsif ($key ~~ ["cust_net_src", "cust_net_tgt", "Custom Network"]) { | |
534 | my $network_address = &fwlib::get_net_ip($value); | |
535 | if ($network_address) { | |
536 | push(@ret, $network_address); | |
a0fb1099 | 537 | } |
8f4f4634 MT |
538 | |
539 | # Custom hosts. | |
540 | } elsif ($key ~~ ["cust_host_src", "cust_host_tgt", "Custom Host"]) { | |
541 | my $host_address = &fwlib::get_host_ip($value, $type); | |
542 | if ($host_address) { | |
543 | push(@ret, $host_address); | |
a0fb1099 | 544 | } |
8f4f4634 MT |
545 | |
546 | # OpenVPN networks. | |
547 | } elsif ($key ~~ ["ovpn_net_src", "ovpn_net_tgt", "OpenVPN static network"]) { | |
548 | my $network_address = &fwlib::get_ovpn_net_ip($value, 1); | |
549 | if ($network_address) { | |
550 | push(@ret, $network_address); | |
a0fb1099 | 551 | } |
8f4f4634 MT |
552 | |
553 | # OpenVPN hosts. | |
554 | } elsif ($key ~~ ["ovpn_host_src", "ovpn_host_tgt", "OpenVPN static host"]) { | |
555 | my $host_address = &fwlib::get_ovpn_host_ip($value, 33); | |
556 | if ($host_address) { | |
557 | push(@ret, $host_address); | |
a0fb1099 | 558 | } |
8f4f4634 MT |
559 | |
560 | # OpenVPN N2N. | |
561 | } elsif ($key ~~ ["ovpn_n2n_src", "ovpn_n2n_tgt", "OpenVPN N-2-N"]) { | |
562 | my $network_address = &fwlib::get_ovpn_n2n_ip($value, 11); | |
563 | if ($network_address) { | |
564 | push(@ret, $network_address); | |
565 | } | |
566 | ||
567 | # IPsec networks. | |
568 | } elsif ($key ~~ ["ipsec_net_src", "ipsec_net_tgt", "IpSec Network"]) { | |
569 | my $network_address = &fwlib::get_ipsec_net_ip($value, 11); | |
570 | if ($network_address) { | |
571 | push(@ret, $network_address); | |
572 | } | |
573 | ||
574 | # The firewall's own IP addresses. | |
575 | } elsif ($key ~~ ["ipfire", "ipfire_src"]) { | |
576 | # ALL | |
577 | if ($value eq "ALL") { | |
578 | push(@ret, "0/0"); | |
579 | ||
580 | # GREEN | |
581 | } elsif ($value eq "GREEN") { | |
582 | push(@ret, $defaultNetworks{"GREEN_ADDRESS"}); | |
583 | ||
584 | # BLUE | |
585 | } elsif ($value eq "BLUE") { | |
586 | push(@ret, $defaultNetworks{"BLUE_ADDRESS"}); | |
587 | ||
588 | # ORANGE | |
589 | } elsif ($value eq "ORANGE") { | |
590 | push(@ret, $defaultNetworks{"ORANGE_ADDRESS"}); | |
591 | ||
592 | # RED | |
593 | } elsif ($value ~~ ["RED", "RED1"]) { | |
594 | my $address = &get_external_address(); | |
595 | if ($address) { | |
596 | push(@ret, $address); | |
597 | } | |
598 | ||
599 | # Aliases | |
600 | } else { | |
601 | my %alias = &get_alias($value); | |
602 | if (%alias) { | |
603 | push(@ret, $alias{"IPT"}); | |
a0fb1099 AM |
604 | } |
605 | } | |
8f4f4634 MT |
606 | |
607 | # If nothing was selected, we assume "any". | |
608 | } else { | |
609 | push(@ret, "0/0"); | |
2a81ab0d | 610 | } |
8f4f4634 MT |
611 | |
612 | return @ret; | |
2a81ab0d | 613 | } |
97ab0569 | 614 | |
8f4f4634 MT |
615 | sub get_protocols { |
616 | my $hash = shift; | |
617 | my $key = shift; | |
618 | ||
619 | my $uses_source_ports = ($$hash{$key}[7] eq "ON"); | |
620 | my $uses_services = ($$hash{$key}[11] eq "ON"); | |
621 | ||
622 | my @protocols = (); | |
623 | ||
624 | # Rules which don't have source ports or services (like ICMP, ESP, ...). | |
625 | if (!$uses_source_ports && !$uses_services) { | |
626 | push(@protocols, $$hash{$key}[8]); | |
627 | ||
628 | # Rules which either use ports or services. | |
629 | } elsif ($uses_source_ports || $uses_services) { | |
630 | # Check if service group or service | |
631 | if ($$hash{$key}[14] eq 'cust_srv') { | |
632 | push(@protocols, &fwlib::get_srv_prot($$hash{$key}[15])); | |
633 | ||
634 | } elsif($$hash{$key}[14] eq 'cust_srvgrp'){ | |
635 | my $protos = &fwlib::get_srvgrp_prot($$hash{$key}[15]); | |
636 | push(@protocols, split(",", $protos)); | |
637 | ||
638 | } else { | |
639 | # Fetch the protocol for this rule. | |
640 | my $protocol = lc($$hash{$key}[8]); | |
641 | ||
642 | # Fetch source and destination ports for this rule. | |
643 | my $source_ports = $$hash{$key}[10]; | |
644 | my $destination_ports = $$hash{$key}[15]; | |
645 | ||
646 | # Check if ports are set for protocols which do not support ports. | |
647 | if (!($protocol ~~ @PROTOCOLS_WITH_PORTS) && ($source_ports || $destination_ports)) { | |
648 | print_error("$protocol does not support ports"); | |
649 | return (); | |
650 | } | |
651 | ||
652 | push(@protocols, $protocol); | |
2a81ab0d AM |
653 | } |
654 | } | |
8f4f4634 MT |
655 | |
656 | # Remove all empty elements | |
657 | @protocols = map { $_ ? $_ : () } @protocols; | |
658 | ||
659 | # If no protocol has been defined, we assume "all". | |
660 | if (!@protocols) { | |
661 | push(@protocols, "all"); | |
98cee89f | 662 | } |
8f4f4634 MT |
663 | |
664 | # Make all protocol names lowercase. | |
665 | @protocols = map { lc } @protocols; | |
666 | ||
667 | return @protocols; | |
2a81ab0d | 668 | } |
97ab0569 | 669 | |
8f4f4634 MT |
670 | sub get_protocol_options { |
671 | my $hash = shift; | |
672 | my $key = shift; | |
673 | my $protocol = shift; | |
674 | my @options = (); | |
675 | ||
676 | # Process source ports. | |
677 | my $use_src_ports = ($$hash{$key}[7] eq "ON"); | |
678 | my $src_ports = $$hash{$key}[10]; | |
679 | ||
680 | if ($use_src_ports && $src_ports) { | |
681 | push(@options, &format_ports($src_ports, "src")); | |
682 | } | |
683 | ||
684 | # Process destination ports. | |
685 | my $use_dst_ports = ($$hash{$key}[11] eq "ON"); | |
686 | my $use_dnat = (($$hash{$key}[28] eq "ON") && ($$hash{$key}[31] eq "dnat")); | |
687 | ||
688 | if ($use_dst_ports) { | |
689 | my $dst_ports_mode = $$hash{$key}[14]; | |
690 | my $dst_ports = $$hash{$key}[15]; | |
691 | if ($use_dnat && $$hash{$key}[30]) { | |
692 | $dst_ports = $$hash{$key}[30]; | |
2a81ab0d | 693 | } |
8f4f4634 MT |
694 | |
695 | if (($dst_ports_mode eq "TGT_PORT") && $dst_ports) { | |
696 | push(@options, &format_ports($dst_ports, "dst")); | |
697 | ||
698 | } elsif ($dst_ports_mode eq "cust_srv") { | |
699 | if ($protocol eq "ICMP") { | |
700 | push(@options, ("--icmp-type", &fwlib::get_srv_port($dst_ports, 3, "ICMP"))); | |
701 | } else { | |
702 | $dst_ports = &fwlib::get_srv_port($dst_ports, 1, uc($protocol)); | |
703 | push(@options, &format_ports($dst_ports, "dst")); | |
2a81ab0d | 704 | } |
8f4f4634 MT |
705 | |
706 | } elsif ($dst_ports_mode eq "cust_srvgrp") { | |
707 | push(@options, &fwlib::get_srvgrp_port($dst_ports, uc($protocol))); | |
2a81ab0d AM |
708 | } |
709 | } | |
8f4f4634 MT |
710 | |
711 | # Check if a single ICMP type is selected. | |
712 | if (!$use_src_ports && !$use_dst_ports && $protocol eq "icmp") { | |
713 | my $icmp_type = $$hash{$key}[9]; | |
714 | ||
715 | if (($icmp_type ne "All ICMP-Types") && $icmp_type) { | |
716 | push(@options, ("--icmp-type", $icmp_type)); | |
a4c7bf6b AM |
717 | } |
718 | } | |
8f4f4634 MT |
719 | |
720 | return @options; | |
721 | } | |
722 | ||
723 | sub format_ports { | |
724 | my $ports = shift; | |
725 | my $type = shift; | |
726 | ||
727 | my $arg; | |
728 | if ($type eq "src") { | |
729 | $arg = "--sport"; | |
730 | } elsif ($type eq "dst") { | |
731 | $arg = "--dport"; | |
732 | } | |
733 | ||
734 | my @options = (); | |
735 | ||
736 | if ($ports =~ /\|/) { | |
737 | $ports =~ s/\|/,/g; | |
738 | push(@options, ("-m", "multiport")); | |
739 | } | |
740 | ||
741 | push(@options, ($arg, $ports)); | |
742 | ||
743 | return @options; | |
744 | } | |
745 | ||
746 | sub get_dnat_target_port { | |
747 | my $hash = shift; | |
748 | my $key = shift; | |
749 | ||
750 | if ($$hash{$key}[14] eq "TGT_PORT") { | |
751 | return $$hash{$key}[15]; | |
752 | } | |
2a81ab0d | 753 | } |
6e87f0aa MT |
754 | |
755 | sub add_dnat_mangle_rules { | |
756 | my $nat_address = shift; | |
757 | my @options = @_; | |
758 | ||
759 | my $mark = 0; | |
760 | foreach my $zone ("GREEN", "BLUE", "ORANGE") { | |
761 | $mark++; | |
762 | ||
763 | # Skip rule if not all required information exists. | |
764 | next unless (exists $defaultNetworks{$zone . "_NETADDRESS"}); | |
765 | next unless (exists $defaultNetworks{$zone . "_NETMASK"}); | |
766 | ||
767 | my @mangle_options = @options; | |
768 | ||
769 | my $netaddress = $defaultNetworks{$zone . "_NETADDRESS"}; | |
770 | $netaddress .= "/" . $defaultNetworks{$zone . "_NETMASK"}; | |
771 | ||
772 | push(@mangle_options, ("-s", $netaddress, "-d", $nat_address)); | |
773 | push(@mangle_options, ("-j", "MARK", "--set-mark", $mark)); | |
774 | ||
775 | run("$IPTABLES -t mangle -A $CHAIN_MANGLE_NAT_DESTINATION_FIX @mangle_options"); | |
776 | } | |
777 | } |