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2a81ab0d AM |
1 | #!/usr/bin/perl |
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 AM |
21 | |
22 | use strict; | |
23 | no warnings 'uninitialized'; | |
24 | ||
25 | package fwlib; | |
26 | ||
27 | my %customnetwork=(); | |
28 | my %customhost=(); | |
29 | my %customgrp=(); | |
30 | my %customservice=(); | |
31 | my %customservicegrp=(); | |
32 | my %ccdnet=(); | |
33 | my %ccdhost=(); | |
34 | my %ipsecconf=(); | |
35 | my %ipsecsettings=(); | |
36 | my %netsettings=(); | |
37 | my %ovpnsettings=(); | |
4e54e3c6 | 38 | my %aliases=(); |
2a81ab0d AM |
39 | |
40 | require '/var/ipfire/general-functions.pl'; | |
41 | ||
42 | my $confignet = "${General::swroot}/fwhosts/customnetworks"; | |
43 | my $confighost = "${General::swroot}/fwhosts/customhosts"; | |
44 | my $configgrp = "${General::swroot}/fwhosts/customgroups"; | |
45 | my $configsrv = "${General::swroot}/fwhosts/customservices"; | |
46 | my $configsrvgrp = "${General::swroot}/fwhosts/customservicegrp"; | |
47 | my $configccdnet = "${General::swroot}/ovpn/ccd.conf"; | |
48 | my $configccdhost = "${General::swroot}/ovpn/ovpnconfig"; | |
49 | my $configipsec = "${General::swroot}/vpn/config"; | |
50 | my $configovpn = "${General::swroot}/ovpn/settings"; | |
51 | my $val; | |
52 | my $field; | |
fd169d0a | 53 | my $netsettings = "${General::swroot}/ethernet/settings"; |
2a81ab0d AM |
54 | |
55 | &General::readhash("/var/ipfire/ethernet/settings", \%netsettings); | |
56 | &General::readhash("${General::swroot}/ovpn/settings", \%ovpnsettings); | |
57 | &General::readhash("${General::swroot}/vpn/settings", \%ipsecsettings); | |
2a81ab0d AM |
58 | |
59 | &General::readhasharray("$confignet", \%customnetwork); | |
60 | &General::readhasharray("$confighost", \%customhost); | |
61 | &General::readhasharray("$configgrp", \%customgrp); | |
62 | &General::readhasharray("$configccdnet", \%ccdnet); | |
63 | &General::readhasharray("$configccdhost", \%ccdhost); | |
64 | &General::readhasharray("$configipsec", \%ipsecconf); | |
65 | &General::readhasharray("$configsrv", \%customservice); | |
66 | &General::readhasharray("$configsrvgrp", \%customservicegrp); | |
085a20ec | 67 | &General::get_aliases(\%aliases); |
2a81ab0d AM |
68 | |
69 | sub get_srv_prot | |
70 | { | |
71 | my $val=shift; | |
992394d5 | 72 | foreach my $key (sort {$a <=> $b} keys %customservice){ |
2a81ab0d AM |
73 | if($customservice{$key}[0] eq $val){ |
74 | if ($customservice{$key}[0] eq $val){ | |
75 | return $customservice{$key}[2]; | |
76 | } | |
77 | } | |
78 | } | |
79 | } | |
80 | sub get_srvgrp_prot | |
81 | { | |
82 | my $val=shift; | |
83 | my @ips=(); | |
84 | my $tcp; | |
85 | my $udp; | |
86 | my $icmp; | |
992394d5 | 87 | foreach my $key (sort {$a <=> $b} keys %customservicegrp){ |
2a81ab0d AM |
88 | if($customservicegrp{$key}[0] eq $val){ |
89 | if (&get_srv_prot($customservicegrp{$key}[2]) eq 'TCP'){ | |
90 | $tcp=1; | |
91 | }elsif(&get_srv_prot($customservicegrp{$key}[2]) eq 'UDP'){ | |
92 | $udp=1; | |
93 | }elsif(&get_srv_prot($customservicegrp{$key}[2]) eq 'ICMP'){ | |
94 | $icmp=1; | |
82b837cf AM |
95 | }else{ |
96 | #Protocols used in servicegroups | |
97 | push (@ips,$customservicegrp{$key}[2]); | |
98 | } | |
2a81ab0d AM |
99 | } |
100 | } | |
101 | if ($tcp eq '1'){push (@ips,'TCP');} | |
102 | if ($udp eq '1'){push (@ips,'UDP');} | |
103 | if ($icmp eq '1'){push (@ips,'ICMP');} | |
104 | my $back=join(",",@ips); | |
105 | return $back; | |
106 | ||
107 | } | |
2a81ab0d AM |
108 | sub get_srv_port |
109 | { | |
110 | my $val=shift; | |
111 | my $field=shift; | |
112 | my $prot=shift; | |
992394d5 | 113 | foreach my $key (sort {$a <=> $b} keys %customservice){ |
14bcb9a2 AM |
114 | if($customservice{$key}[0] eq $val && $customservice{$key}[2] eq $prot){ |
115 | return $customservice{$key}[$field]; | |
2a81ab0d AM |
116 | } |
117 | } | |
118 | } | |
119 | sub get_srvgrp_port | |
120 | { | |
121 | my $val=shift; | |
122 | my $prot=shift; | |
123 | my $back; | |
124 | my $value; | |
125 | my @ips=(); | |
992394d5 | 126 | foreach my $key (sort {$a <=> $b} keys %customservicegrp){ |
2a81ab0d AM |
127 | if($customservicegrp{$key}[0] eq $val){ |
128 | if ($prot ne 'ICMP'){ | |
129 | $value=&get_srv_port($customservicegrp{$key}[2],1,$prot); | |
130 | }elsif ($prot eq 'ICMP'){ | |
131 | $value=&get_srv_port($customservicegrp{$key}[2],3,$prot); | |
132 | } | |
133 | push (@ips,$value) if ($value ne '') ; | |
134 | } | |
135 | } | |
136 | if($prot ne 'ICMP'){ | |
137 | if ($#ips gt 0){$back="-m multiport --dports ";}else{$back="--dport ";} | |
138 | }elsif ($prot eq 'ICMP'){ | |
139 | $back="--icmp-type "; | |
140 | } | |
141 | ||
142 | $back.=join(",",@ips); | |
143 | return $back; | |
144 | } | |
145 | sub get_ipsec_net_ip | |
146 | { | |
147 | my $val=shift; | |
148 | my $field=shift; | |
992394d5 | 149 | foreach my $key (sort {$a <=> $b} keys %ipsecconf){ |
2a81ab0d AM |
150 | if($ipsecconf{$key}[1] eq $val){ |
151 | return $ipsecconf{$key}[$field]; | |
152 | } | |
153 | } | |
154 | } | |
155 | sub get_ipsec_host_ip | |
156 | { | |
157 | my $val=shift; | |
158 | my $field=shift; | |
992394d5 | 159 | foreach my $key (sort {$a <=> $b} keys %ipsecconf){ |
2a81ab0d AM |
160 | if($ipsecconf{$key}[1] eq $val){ |
161 | return $ipsecconf{$key}[$field]; | |
162 | } | |
163 | } | |
164 | } | |
165 | sub get_ovpn_n2n_ip | |
166 | { | |
167 | my $val=shift; | |
168 | my $field=shift; | |
992394d5 | 169 | foreach my $key (sort {$a <=> $b} keys %ccdhost){ |
2a81ab0d AM |
170 | if($ccdhost{$key}[1] eq $val){ |
171 | return $ccdhost{$key}[$field]; | |
172 | } | |
173 | } | |
174 | } | |
175 | sub get_ovpn_host_ip | |
176 | { | |
177 | my $val=shift; | |
178 | my $field=shift; | |
992394d5 | 179 | foreach my $key (sort {$a <=> $b} keys %ccdhost){ |
2a81ab0d AM |
180 | if($ccdhost{$key}[1] eq $val){ |
181 | return $ccdhost{$key}[$field]; | |
182 | } | |
183 | } | |
184 | } | |
185 | sub get_ovpn_net_ip | |
186 | { | |
187 | ||
188 | my $val=shift; | |
189 | my $field=shift; | |
992394d5 | 190 | foreach my $key (sort {$a <=> $b} keys %ccdnet){ |
2a81ab0d AM |
191 | if($ccdnet{$key}[0] eq $val){ |
192 | return $ccdnet{$key}[$field]; | |
193 | } | |
194 | } | |
195 | } | |
196 | sub get_grp_ip | |
197 | { | |
198 | my $val=shift; | |
199 | my $src=shift; | |
992394d5 | 200 | foreach my $key (sort {$a <=> $b} keys %customgrp){ |
2a81ab0d AM |
201 | if ($customgrp{$key}[0] eq $val){ |
202 | &get_address($customgrp{$key}[3],$src); | |
203 | } | |
204 | } | |
205 | ||
206 | } | |
207 | sub get_std_net_ip | |
208 | { | |
209 | my $val=shift; | |
ddcec9d3 | 210 | my $con=shift; |
2a81ab0d AM |
211 | if ($val eq 'ALL'){ |
212 | return "0.0.0.0/0.0.0.0"; | |
213 | }elsif($val eq 'GREEN'){ | |
214 | return "$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}"; | |
215 | }elsif($val eq 'ORANGE'){ | |
216 | return "$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}"; | |
217 | }elsif($val eq 'BLUE'){ | |
218 | return "$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}"; | |
62fc8511 | 219 | }elsif($val eq 'RED'){ |
ddcec9d3 | 220 | return "0.0.0.0/0 -o $con"; |
2a81ab0d AM |
221 | }elsif($val =~ /OpenVPN/i){ |
222 | return "$ovpnsettings{'DOVPN_SUBNET'}"; | |
223 | }elsif($val =~ /IPsec/i){ | |
224 | return "$ipsecsettings{'RW_NET'}"; | |
5d7faa45 AM |
225 | }elsif($val eq 'IPFire'){ |
226 | return ; | |
2a81ab0d AM |
227 | } |
228 | } | |
229 | sub get_net_ip | |
230 | { | |
231 | my $val=shift; | |
992394d5 | 232 | foreach my $key (sort {$a <=> $b} keys %customnetwork){ |
2a81ab0d AM |
233 | if($customnetwork{$key}[0] eq $val){ |
234 | return "$customnetwork{$key}[1]/$customnetwork{$key}[2]"; | |
235 | } | |
236 | } | |
237 | } | |
238 | sub get_host_ip | |
239 | { | |
240 | my $val=shift; | |
241 | my $src=shift; | |
992394d5 | 242 | foreach my $key (sort {$a <=> $b} keys %customhost){ |
2a81ab0d AM |
243 | if($customhost{$key}[0] eq $val){ |
244 | if ($customhost{$key}[1] eq 'mac' && $src eq 'src'){ | |
245 | return "-m mac --mac-source $customhost{$key}[2]"; | |
246 | }elsif($customhost{$key}[1] eq 'ip' && $src eq 'src'){ | |
247 | return "$customhost{$key}[2]"; | |
248 | }elsif($customhost{$key}[1] eq 'ip' && $src eq 'tgt'){ | |
249 | return "$customhost{$key}[2]"; | |
250 | }elsif($customhost{$key}[1] eq 'mac' && $src eq 'tgt'){ | |
251 | return "none"; | |
252 | } | |
253 | } | |
254 | } | |
255 | } | |
fd169d0a AM |
256 | sub get_addresses |
257 | { | |
4e54e3c6 AM |
258 | my $hash = shift; |
259 | my $key = shift; | |
260 | my $type = shift; | |
261 | ||
262 | my @addresses = (); | |
263 | my $addr_type; | |
264 | my $value; | |
265 | my $group_name; | |
266 | ||
267 | if ($type eq "src") { | |
268 | $addr_type = $$hash{$key}[3]; | |
269 | $value = $$hash{$key}[4]; | |
270 | ||
271 | } elsif ($type eq "tgt") { | |
272 | $addr_type = $$hash{$key}[5]; | |
273 | $value = $$hash{$key}[6]; | |
274 | } | |
275 | ||
276 | if ($addr_type ~~ ["cust_grp_src", "cust_grp_tgt"]) { | |
277 | foreach my $grp (sort {$a <=> $b} keys %customgrp) { | |
278 | if ($customgrp{$grp}[0] eq $value) { | |
279 | my @address = &get_address($customgrp{$grp}[3], $customgrp{$grp}[2], $type); | |
280 | ||
281 | if (@address) { | |
282 | push(@addresses, @address); | |
283 | } | |
284 | } | |
285 | } | |
286 | } else { | |
287 | my @address = &get_address($addr_type, $value, $type); | |
288 | ||
289 | if (@address) { | |
290 | push(@addresses, @address); | |
291 | } | |
292 | } | |
293 | ||
294 | return @addresses; | |
295 | } | |
fd169d0a AM |
296 | sub get_address |
297 | { | |
4e54e3c6 AM |
298 | my $key = shift; |
299 | my $value = shift; | |
300 | my $type = shift; | |
301 | ||
302 | my @ret = (); | |
303 | ||
304 | # If the user manually typed an address, we just check if it is a MAC | |
305 | # address. Otherwise, we assume that it is an IP address. | |
306 | if ($key ~~ ["src_addr", "tgt_addr"]) { | |
307 | if (&General::validmac($value)) { | |
308 | push(@ret, "-m mac --mac-source $value"); | |
309 | } else { | |
310 | push(@ret, $value); | |
311 | } | |
312 | ||
313 | # If a default network interface (GREEN, BLUE, etc.) is selected, we | |
314 | # try to get the corresponding address of the network. | |
315 | } elsif ($key ~~ ["std_net_src", "std_net_tgt", "Standard Network"]) { | |
316 | my $external_interface = &get_external_interface(); | |
317 | ||
318 | my $network_address = &get_std_net_ip($value, $external_interface); | |
319 | if ($network_address) { | |
320 | push(@ret, $network_address); | |
321 | } | |
322 | ||
323 | # Custom networks. | |
324 | } elsif ($key ~~ ["cust_net_src", "cust_net_tgt", "Custom Network"]) { | |
325 | my $network_address = &get_net_ip($value); | |
326 | if ($network_address) { | |
327 | push(@ret, $network_address); | |
328 | } | |
329 | ||
330 | # Custom hosts. | |
331 | } elsif ($key ~~ ["cust_host_src", "cust_host_tgt", "Custom Host"]) { | |
332 | my $host_address = &get_host_ip($value, $type); | |
333 | if ($host_address) { | |
334 | push(@ret, $host_address); | |
335 | } | |
336 | ||
337 | # OpenVPN networks. | |
338 | } elsif ($key ~~ ["ovpn_net_src", "ovpn_net_tgt", "OpenVPN static network"]) { | |
339 | my $network_address = &get_ovpn_net_ip($value, 1); | |
340 | if ($network_address) { | |
341 | push(@ret, $network_address); | |
342 | } | |
343 | ||
344 | # OpenVPN hosts. | |
345 | } elsif ($key ~~ ["ovpn_host_src", "ovpn_host_tgt", "OpenVPN static host"]) { | |
346 | my $host_address = &get_ovpn_host_ip($value, 33); | |
347 | if ($host_address) { | |
348 | push(@ret, $host_address); | |
349 | } | |
350 | ||
351 | # OpenVPN N2N. | |
352 | } elsif ($key ~~ ["ovpn_n2n_src", "ovpn_n2n_tgt", "OpenVPN N-2-N"]) { | |
353 | my $network_address = &get_ovpn_n2n_ip($value, 11); | |
354 | if ($network_address) { | |
355 | push(@ret, $network_address); | |
356 | } | |
357 | ||
358 | # IPsec networks. | |
359 | } elsif ($key ~~ ["ipsec_net_src", "ipsec_net_tgt", "IpSec Network"]) { | |
360 | my $network_address = &get_ipsec_net_ip($value, 11); | |
361 | if ($network_address) { | |
362 | push(@ret, $network_address); | |
363 | } | |
364 | ||
365 | # The firewall's own IP addresses. | |
366 | } elsif ($key ~~ ["ipfire", "ipfire_src"]) { | |
367 | # ALL | |
368 | if ($value eq "ALL") { | |
369 | push(@ret, "0/0"); | |
370 | ||
371 | # GREEN | |
372 | } elsif ($value eq "GREEN") { | |
c71499d8 | 373 | push(@ret, $netsettings{"GREEN_ADDRESS"}); |
4e54e3c6 AM |
374 | |
375 | # BLUE | |
376 | } elsif ($value eq "BLUE") { | |
c71499d8 | 377 | push(@ret, $netsettings{"BLUE_ADDRESS"}); |
4e54e3c6 AM |
378 | |
379 | # ORANGE | |
380 | } elsif ($value eq "ORANGE") { | |
c71499d8 | 381 | push(@ret, $netsettings{"ORANGE_ADDRESS"}); |
4e54e3c6 AM |
382 | |
383 | # RED | |
384 | } elsif ($value ~~ ["RED", "RED1"]) { | |
385 | my $address = &get_external_address(); | |
386 | if ($address) { | |
387 | push(@ret, $address); | |
388 | } | |
389 | ||
390 | # Aliases | |
391 | } else { | |
085a20ec MT |
392 | my $alias = &get_alias($value); |
393 | if ($alias) { | |
394 | push(@ret, $alias); | |
4e54e3c6 AM |
395 | } |
396 | } | |
397 | ||
398 | # If nothing was selected, we assume "any". | |
399 | } else { | |
400 | push(@ret, "0/0"); | |
401 | } | |
402 | ||
403 | return @ret; | |
404 | } | |
fd169d0a AM |
405 | sub get_external_interface() |
406 | { | |
4e54e3c6 AM |
407 | open(IFACE, "/var/ipfire/red/iface") or return ""; |
408 | my $iface = <IFACE>; | |
409 | close(IFACE); | |
410 | ||
411 | return $iface; | |
412 | } | |
fd169d0a AM |
413 | sub get_external_address() |
414 | { | |
4e54e3c6 AM |
415 | open(ADDR, "/var/ipfire/red/local-ipaddress") or return ""; |
416 | my $address = <ADDR>; | |
417 | close(ADDR); | |
418 | ||
419 | return $address; | |
420 | } | |
fd169d0a AM |
421 | sub get_alias |
422 | { | |
4e54e3c6 AM |
423 | my $id = shift; |
424 | ||
425 | foreach my $alias (sort keys %aliases) { | |
426 | if ($id eq $alias) { | |
085a20ec | 427 | return $aliases{$alias}{"IPT"}; |
4e54e3c6 AM |
428 | } |
429 | } | |
430 | } | |
085a20ec MT |
431 | |
432 | sub get_nat_address { | |
4e54e3c6 AM |
433 | my $zone = shift; |
434 | my $source = shift; | |
435 | ||
436 | # Any static address of any zone. | |
437 | if ($zone eq "AUTO") { | |
fd169d0a | 438 | if ($source && ($source !~ m/mac/i )) { |
4e54e3c6 AM |
439 | my $firewall_ip = &get_internal_firewall_ip_address($source, 1); |
440 | if ($firewall_ip) { | |
441 | return $firewall_ip; | |
442 | } | |
443 | ||
444 | $firewall_ip = &get_matching_firewall_address($source, 1); | |
445 | if ($firewall_ip) { | |
446 | return $firewall_ip; | |
447 | } | |
448 | } | |
449 | ||
450 | return &get_external_address(); | |
451 | ||
452 | } elsif ($zone eq "RED" || $zone eq "GREEN" || $zone eq "ORANGE" || $zone eq "BLUE") { | |
c71499d8 | 453 | return $netsettings{$zone . "_ADDRESS"}; |
4e54e3c6 | 454 | |
085a20ec | 455 | } elsif ($zone ~~ ["Default IP", "ALL"]) { |
4e54e3c6 AM |
456 | return &get_external_address(); |
457 | ||
458 | } else { | |
085a20ec MT |
459 | my $alias = &get_alias($zone); |
460 | unless ($alias) { | |
461 | $alias = &get_external_address(); | |
462 | } | |
463 | return $alias; | |
4e54e3c6 AM |
464 | } |
465 | ||
466 | print_error("Could not find NAT address"); | |
467 | } | |
085a20ec | 468 | |
fd169d0a AM |
469 | sub get_internal_firewall_ip_addresses |
470 | { | |
4e54e3c6 AM |
471 | my $use_orange = shift; |
472 | ||
473 | my @zones = ("GREEN", "BLUE"); | |
474 | if ($use_orange) { | |
475 | push(@zones, "ORANGE"); | |
476 | } | |
477 | ||
478 | my @addresses = (); | |
479 | for my $zone (@zones) { | |
c71499d8 | 480 | next unless (exists $netsettings{$zone . "_ADDRESS"}); |
4e54e3c6 | 481 | |
c71499d8 | 482 | my $zone_address = $netsettings{$zone . "_ADDRESS"}; |
4e54e3c6 AM |
483 | push(@addresses, $zone_address); |
484 | } | |
485 | ||
486 | return @addresses; | |
487 | } | |
fd169d0a AM |
488 | sub get_matching_firewall_address |
489 | { | |
4e54e3c6 AM |
490 | my $addr = shift; |
491 | my $use_orange = shift; | |
492 | ||
493 | my ($address, $netmask) = split("/", $addr); | |
494 | ||
495 | my @zones = ("GREEN", "BLUE"); | |
496 | if ($use_orange) { | |
497 | push(@zones, "ORANGE"); | |
498 | } | |
499 | ||
500 | foreach my $zone (@zones) { | |
c71499d8 | 501 | next unless (exists $netsettings{$zone . "_ADDRESS"}); |
4e54e3c6 | 502 | |
c71499d8 AM |
503 | my $zone_subnet = $netsettings{$zone . "_NETADDRESS"}; |
504 | my $zone_mask = $netsettings{$zone . "_NETMASK"}; | |
4e54e3c6 AM |
505 | |
506 | if (&General::IpInSubnet($address, $zone_subnet, $zone_mask)) { | |
c71499d8 | 507 | return $netsettings{$zone . "_ADDRESS"}; |
4e54e3c6 AM |
508 | } |
509 | } | |
510 | ||
511 | return 0; | |
512 | } | |
fd169d0a AM |
513 | sub get_internal_firewall_ip_address |
514 | { | |
4e54e3c6 AM |
515 | my $subnet = shift; |
516 | my $use_orange = shift; | |
517 | ||
518 | my ($net_address, $net_mask) = split("/", $subnet); | |
519 | if ((!$net_mask) || ($net_mask ~~ ["32", "255.255.255.255"])) { | |
520 | return 0; | |
521 | } | |
522 | ||
aa5f4b65 MT |
523 | # Convert net mask into correct format for &General::IpInSubnet(). |
524 | $net_mask = &General::iporsubtodec($net_mask); | |
525 | ||
4e54e3c6 AM |
526 | my @addresses = &get_internal_firewall_ip_addresses($use_orange); |
527 | foreach my $zone_address (@addresses) { | |
528 | if (&General::IpInSubnet($zone_address, $net_address, $net_mask)) { | |
529 | return $zone_address; | |
530 | } | |
531 | } | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
2a81ab0d | 536 | return 1; |