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add a way to define some default chains
[pve-firewall.git] / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
f789653a 7use PVE::Tools;
b6360c3f 8use PVE::QemuServer;
5e1267a5
DM		 9use File::Path;
10use IO::File;
ecbea048 11use Net::IP;
06320eb0 12use PVE::Tools qw(run_command lock_file);
ecbea048 13
5e1267a5 14use Data::Dumper;
b6360c3f 15
06320eb0
DM		 16my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
17
857f62c8 18# imported/converted from: /usr/share/shorewall/macro.*
961b4928 19my $pve_fw_macros = {
857f62c8
DM		 20 'Amanda' => [
21 { action => 'PARAM', proto => 'udp', dport => '10080' },
22 { action => 'PARAM', proto => 'tcp', dport => '10080' },
23 ],
24 'Auth' => [
25 { action => 'PARAM', proto => 'tcp', dport => '113' },
26 ],
27 'BGP' => [
28 { action => 'PARAM', proto => 'tcp', dport => '179' },
29 ],
30 'BitTorrent' => [
961b4928 31 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 32 { action => 'PARAM', proto => 'udp', dport => '6881' },
33 ],
34 'BitTorrent32' => [
35 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
36 { action => 'PARAM', proto => 'udp', dport => '6881' },
37 ],
38 'CVS' => [
39 { action => 'PARAM', proto => 'tcp', dport => '2401' },
40 ],
41 'Citrix' => [
42 { action => 'PARAM', proto => 'tcp', dport => '1494' },
43 { action => 'PARAM', proto => 'udp', dport => '1604' },
44 { action => 'PARAM', proto => 'tcp', dport => '2598' },
45 ],
46 'DAAP' => [
47 { action => 'PARAM', proto => 'tcp', dport => '3689' },
48 { action => 'PARAM', proto => 'udp', dport => '3689' },
49 ],
50 'DCC' => [
51 { action => 'PARAM', proto => 'tcp', dport => '6277' },
52 ],
53 'DHCPfwd' => [
54 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
55 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
56 ],
57 'DNS' => [
58 { action => 'PARAM', proto => 'udp', dport => '53' },
59 { action => 'PARAM', proto => 'tcp', dport => '53' },
60 ],
61 'Distcc' => [
62 { action => 'PARAM', proto => 'tcp', dport => '3632' },
63 ],
64 'Edonkey' => [
65 { action => 'PARAM', proto => 'tcp', dport => '4662' },
66 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 67 ],
857f62c8
DM		 68 'FTP' => [
69 { action => 'PARAM', proto => 'tcp', dport => '21' },
70 ],
71 'Finger' => [
72 { action => 'PARAM', proto => 'tcp', dport => '79' },
73 ],
74 'GNUnet' => [
75 { action => 'PARAM', proto => 'tcp', dport => '2086' },
76 { action => 'PARAM', proto => 'udp', dport => '2086' },
77 { action => 'PARAM', proto => 'tcp', dport => '1080' },
78 { action => 'PARAM', proto => 'udp', dport => '1080' },
79 ],
80 'GRE' => [
81 { action => 'PARAM', proto => '47' },
82 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
83 ],
84 'Git' => [
85 { action => 'PARAM', proto => 'tcp', dport => '9418' },
86 ],
87 'Gnutella' => [
88 { action => 'PARAM', proto => 'tcp', dport => '6346' },
89 { action => 'PARAM', proto => 'udp', dport => '6346' },
90 ],
91 'HKP' => [
92 { action => 'PARAM', proto => 'tcp', dport => '11371' },
93 ],
94 'HTTP' => [
961b4928
DM		 95 { action => 'PARAM', proto => 'tcp', dport => '80' },
96 ],
857f62c8
DM		 97 'HTTPS' => [
98 { action => 'PARAM', proto => 'tcp', dport => '443' },
99 ],
100 'ICPV2' => [
101 { action => 'PARAM', proto => 'udp', dport => '3130' },
102 ],
103 'ICQ' => [
104 { action => 'PARAM', proto => 'tcp', dport => '5190' },
105 ],
106 'IMAP' => [
107 { action => 'PARAM', proto => 'tcp', dport => '143' },
108 ],
109 'IMAPS' => [
110 { action => 'PARAM', proto => 'tcp', dport => '993' },
111 ],
112 'IPIP' => [
113 { action => 'PARAM', proto => '94' },
114 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
115 ],
116 'IPP' => [
117 { action => 'PARAM', proto => 'tcp', dport => '631' },
118 ],
119 'IPPbrd' => [
120 { action => 'PARAM', proto => 'udp', dport => '631' },
121 ],
122 'IPPserver' => [
123 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
124 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
125 ],
126 'IPsec' => [
127 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
128 { action => 'PARAM', proto => '50' },
129 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
130 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
131 ],
132 'IPsecah' => [
133 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
134 { action => 'PARAM', proto => '51' },
135 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
136 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
137 ],
138 'IPsecnat' => [
139 { action => 'PARAM', proto => 'udp', dport => '500' },
140 { action => 'PARAM', proto => 'udp', dport => '4500' },
141 { action => 'PARAM', proto => '50' },
142 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
143 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
144 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
145 ],
146 'IRC' => [
147 { action => 'PARAM', proto => 'tcp', dport => '6667' },
148 ],
149 'JabberPlain' => [
150 { action => 'PARAM', proto => 'tcp', dport => '5222' },
151 ],
152 'JabberSecure' => [
153 { action => 'PARAM', proto => 'tcp', dport => '5223' },
154 ],
155 'Jabberd' => [
156 { action => 'PARAM', proto => 'tcp', dport => '5269' },
157 ],
158 'Jetdirect' => [
159 { action => 'PARAM', proto => 'tcp', dport => '9100' },
160 ],
161 'L2TP' => [
162 { action => 'PARAM', proto => 'udp', dport => '1701' },
163 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
164 ],
165 'LDAP' => [
166 { action => 'PARAM', proto => 'tcp', dport => '389' },
167 ],
168 'LDAPS' => [
169 { action => 'PARAM', proto => 'tcp', dport => '636' },
170 ],
171 'MSNP' => [
172 { action => 'PARAM', proto => 'tcp', dport => '1863' },
173 ],
174 'MSSQL' => [
175 { action => 'PARAM', proto => 'tcp', dport => '1433' },
176 ],
177 'Mail' => [
178 { action => 'PARAM', proto => 'tcp', dport => '25' },
179 { action => 'PARAM', proto => 'tcp', dport => '465' },
180 { action => 'PARAM', proto => 'tcp', dport => '587' },
181 ],
182 'Munin' => [
183 { action => 'PARAM', proto => 'tcp', dport => '4949' },
184 ],
185 'MySQL' => [
186 { action => 'PARAM', proto => 'tcp', dport => '3306' },
187 ],
188 'NNTP' => [
189 { action => 'PARAM', proto => 'tcp', dport => '119' },
190 ],
191 'NNTPS' => [
192 { action => 'PARAM', proto => 'tcp', dport => '563' },
193 ],
194 'NTP' => [
195 { action => 'PARAM', proto => 'udp', dport => '123' },
196 ],
197 'NTPbi' => [
198 { action => 'PARAM', proto => 'udp', dport => '123' },
199 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
200 ],
201 'NTPbrd' => [
202 { action => 'PARAM', proto => 'udp', dport => '123' },
203 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
204 ],
205 'OSPF' => [
206 { action => 'PARAM', proto => '89' },
207 ],
208 'OpenVPN' => [
209 { action => 'PARAM', proto => 'udp', dport => '1194' },
210 ],
211 'PCA' => [
212 { action => 'PARAM', proto => 'udp', dport => '5632' },
213 { action => 'PARAM', proto => 'tcp', dport => '5631' },
214 ],
215 'POP3' => [
216 { action => 'PARAM', proto => 'tcp', dport => '110' },
217 ],
218 'POP3S' => [
219 { action => 'PARAM', proto => 'tcp', dport => '995' },
220 ],
221 'PPtP' => [
222 { action => 'PARAM', proto => '47' },
223 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
224 { action => 'PARAM', proto => 'tcp', dport => '1723' },
225 ],
226 'Ping' => [
227 { action => 'PARAM', proto => 'icmp', dport => '8' },
228 ],
229 'PostgreSQL' => [
230 { action => 'PARAM', proto => 'tcp', dport => '5432' },
231 ],
232 'Printer' => [
233 { action => 'PARAM', proto => 'tcp', dport => '515' },
234 ],
235 'RDP' => [
236 { action => 'PARAM', proto => 'tcp', dport => '3389' },
237 ],
238 'RIPbi' => [
239 { action => 'PARAM', proto => 'udp', dport => '520' },
240 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
241 ],
242 'RNDC' => [
243 { action => 'PARAM', proto => 'tcp', dport => '953' },
244 ],
245 'Razor' => [
246 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
247 ],
248 'Rdate' => [
249 { action => 'PARAM', proto => 'tcp', dport => '37' },
250 ],
251 'Rsync' => [
252 { action => 'PARAM', proto => 'tcp', dport => '873' },
253 ],
254 'SANE' => [
255 { action => 'PARAM', proto => 'tcp', dport => '6566' },
256 ],
257 'SMB' => [
258 { action => 'PARAM', proto => 'udp', dport => '135,445' },
259 { action => 'PARAM', proto => 'udp', dport => '137:139' },
260 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
261 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
262 ],
263 'SMBBI' => [
264 { action => 'PARAM', proto => 'udp', dport => '135,445' },
265 { action => 'PARAM', proto => 'udp', dport => '137:139' },
266 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
267 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
268 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
269 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
270 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
271 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
272 ],
273 'SMBswat' => [
274 { action => 'PARAM', proto => 'tcp', dport => '901' },
275 ],
276 'SMTP' => [
277 { action => 'PARAM', proto => 'tcp', dport => '25' },
278 ],
279 'SMTPS' => [
280 { action => 'PARAM', proto => 'tcp', dport => '465' },
281 ],
282 'SNMP' => [
283 { action => 'PARAM', proto => 'udp', dport => '161:162' },
284 { action => 'PARAM', proto => 'tcp', dport => '161' },
285 ],
286 'SPAMD' => [
287 { action => 'PARAM', proto => 'tcp', dport => '783' },
288 ],
289 'SSH' => [
290 { action => 'PARAM', proto => 'tcp', dport => '22' },
291 ],
292 'SVN' => [
293 { action => 'PARAM', proto => 'tcp', dport => '3690' },
294 ],
295 'SixXS' => [
296 { action => 'PARAM', proto => 'tcp', dport => '3874' },
297 { action => 'PARAM', proto => 'udp', dport => '3740' },
298 { action => 'PARAM', proto => '41' },
299 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
300 ],
301 'Squid' => [
302 { action => 'PARAM', proto => 'tcp', dport => '3128' },
303 ],
304 'Submission' => [
305 { action => 'PARAM', proto => 'tcp', dport => '587' },
306 ],
307 'Syslog' => [
308 { action => 'PARAM', proto => 'udp', dport => '514' },
309 { action => 'PARAM', proto => 'tcp', dport => '514' },
310 ],
311 'TFTP' => [
312 { action => 'PARAM', proto => 'udp', dport => '69' },
313 ],
314 'Telnet' => [
315 { action => 'PARAM', proto => 'tcp', dport => '23' },
316 ],
317 'Telnets' => [
318 { action => 'PARAM', proto => 'tcp', dport => '992' },
319 ],
320 'Time' => [
321 { action => 'PARAM', proto => 'tcp', dport => '37' },
322 ],
323 'Trcrt' => [
324 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
325 { action => 'PARAM', proto => 'icmp', dport => '8' },
326 ],
327 'VNC' => [
328 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
329 ],
330 'VNCL' => [
331 { action => 'PARAM', proto => 'tcp', dport => '5500' },
332 ],
333 'Web' => [
334 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 335 { action => 'PARAM', proto => 'tcp', dport => '443' },
336 ],
857f62c8
DM		 337 'Webcache' => [
338 { action => 'PARAM', proto => 'tcp', dport => '8080' },
339 ],
340 'Webmin' => [
341 { action => 'PARAM', proto => 'tcp', dport => '10000' },
342 ],
343 'Whois' => [
344 { action => 'PARAM', proto => 'tcp', dport => '43' },
345 ],
961b4928
DM		 346};
347
348my $pve_fw_parsed_macros;
349my $pve_fw_preferred_macro_names = {};
3a616aa0 350
d8f2505e
DM		 351my $pve_std_chains = {
352 'PVEFW-SET-ACCEPT-MARK' => [
353 "-j MARK --set-mark 1",
354 ],
355};
356
4b586518
DM		 357# iptables -p icmp -h
358my $icmp_type_names = {
359 any => 1,
360 'echo-reply' => 1,
361 'destination-unreachable' => 1,
362 'network-unreachable' => 1,
363 'host-unreachable' => 1,
364 'protocol-unreachable' => 1,
365 'port-unreachable' => 1,
366 'fragmentation-needed' => 1,
367 'source-route-failed' => 1,
368 'network-unknown' => 1,
369 'host-unknown' => 1,
370 'network-prohibited' => 1,
371 'host-prohibited' => 1,
372 'TOS-network-unreachable' => 1,
373 'TOS-host-unreachable' => 1,
374 'communication-prohibited' => 1,
375 'host-precedence-violation' => 1,
376 'precedence-cutoff' => 1,
377 'source-quench' => 1,
378 'redirect' => 1,
379 'network-redirect' => 1,
380 'host-redirect' => 1,
381 'TOS-network-redirect' => 1,
382 'TOS-host-redirect' => 1,
383 'echo-request' => 1,
384 'router-advertisement' => 1,
385 'router-solicitation' => 1,
386 'time-exceeded' => 1,
387 'ttl-zero-during-transit' => 1,
388 'ttl-zero-during-reassembly' => 1,
389 'parameter-problem' => 1,
390 'ip-header-bad' => 1,
391 'required-option-missing' => 1,
392 'timestamp-request' => 1,
393 'timestamp-reply' => 1,
394 'address-mask-request' => 1,
395 'address-mask-reply' => 1,
396};
397
a332200b 398sub get_firewall_macros {
9aab3127 399
961b4928 400 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 401
961b4928 402 $pve_fw_parsed_macros = {};
9aab3127 403
961b4928
DM		 404 foreach my $k (keys %$pve_fw_macros) {
405 my $name = lc($k);
a332200b 406
961b4928
DM		 407 my $macro = $pve_fw_macros->{$k};
408 $pve_fw_preferred_macro_names->{$name} = $k;
409 $pve_fw_parsed_macros->{$name} = $macro;
410 }
a332200b 411
961b4928 412 return $pve_fw_parsed_macros;
9aab3127
DM		 413}
414
fcba0beb
DM		 415my $etc_services;
416
417sub get_etc_services {
418
419 return $etc_services if $etc_services;
420
421 my $filename = "/etc/services";
422
423 my $fh = IO::File->new($filename, O_RDONLY);
424 if (!$fh) {
425 warn "unable to read '$filename' - $!\n";
426 return {};
427 }
428
429 my $services = {};
430
431 while (my $line = <$fh>) {
432 chomp ($line);
433 next if $line =~m/^#/;
434 next if ($line =~m/^\s*$/);
435
436 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
437 $services->{byid}->{$2}->{name} = $1;
35b66e9d 438 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 439 $services->{byid}->{$2}->{$3} = 1;
440 $services->{byname}->{$1} = $services->{byid}->{$2};
441 }
442 }
443
444 close($fh);
445
6158271d
DM		 446 $etc_services = $services;
447
3a616aa0 448
fcba0beb
DM		 449 return $etc_services;
450}
451
452my $etc_protocols;
453
454sub get_etc_protocols {
455 return $etc_protocols if $etc_protocols;
456
457 my $filename = "/etc/protocols";
458
459 my $fh = IO::File->new($filename, O_RDONLY);
460 if (!$fh) {
461 warn "unable to read '$filename' - $!\n";
462 return {};
463 }
464
465 my $protocols = {};
466
467 while (my $line = <$fh>) {
468 chomp ($line);
469 next if $line =~m/^#/;
470 next if ($line =~m/^\s*$/);
471
472 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
473 $protocols->{byid}->{$2}->{name} = $1;
474 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
475 }
476 }
477
478 close($fh);
479
480 $etc_protocols = $protocols;
481
482 return $etc_protocols;
483}
484
ecbea048
DM		 485sub parse_address_list {
486 my ($str) = @_;
487
d6de1dc2 488 my $nbaor = 0;
ecbea048
DM		 489 foreach my $aor (split(/,/, $str)) {
490 if (!Net::IP->new($aor)) {
491 my $err = Net::IP::Error();
492 die "invalid IP address: $err\n";
d6de1dc2
AD		 493 }else{
494 $nbaor++;
ecbea048
DM		 495 }
496 }
d6de1dc2 497 return $nbaor;
ecbea048 498}
dddd9413 499
fcba0beb
DM		 500sub parse_port_name_number_or_range {
501 my ($str) = @_;
502
503 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 504 my $nbports = 0;
fcba0beb 505 foreach my $item (split(/,/, $str)) {
4cdbb3b7 506 my $portlist = "";
35b66e9d 507 my $oldpon = undef;
4b586518 508 $nbports++;
fcba0beb 509 foreach my $pon (split(':', $item, 2)) {
35b66e9d 510 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 511 if ($pon =~ m/^\d+$/){
857f62c8 512 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 513 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
514 $oldpon = $pon;
4cdbb3b7
AD		 515 }else{
516 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
517 }
fcba0beb
DM		 518 }
519 }
520
4cdbb3b7 521 return ($nbports);
fcba0beb
DM		 522}
523
780bcc0f
DM		 524my $bridge_firewall_enabled = 0;
525
526sub enable_bridge_firewall {
527
528 return if $bridge_firewall_enabled; # only once
529
530 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
531 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
532
533 $bridge_firewall_enabled = 1;
534}
535
8cebfa6f 536my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 537
3a616aa0
AD		 538sub iptables {
539 my ($cmd) = @_;
540
541 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
542}
543
b16e818e
DM		 544sub iptables_restore_cmdlist {
545 my ($cmdlist) = @_;
3a616aa0 546
3fa83edf 547 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 548}
549
de2a57cd
DM		 550sub iptables_get_chains {
551
552 my $res = {};
553
554 # check what chains we want to track
555 my $is_pvefw_chain = sub {
556 my $name = shift;
557
dec84fcd
DM		 558 return 1 if $name =~ m/^PVEFW-\S+$/;
559
de2a57cd 560 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
5927497d 561 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 562 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 563
564 return undef;
565 };
566
567 my $table = '';
568
de2a57cd
DM		 569 my $parser = sub {
570 my $line = shift;
571
572 return if $line =~ m/^#/;
573 return if $line =~ m/^\s*$/;
574
575 if ($line =~ m/^\*(\S+)$/) {
576 $table = $1;
577 return;
578 }
579
580 return if $table ne 'filter';
581
582 if ($line =~ m/^:(\S+)\s/) {
583 my $chain = $1;
584 return if !&$is_pvefw_chain($chain);
3fa83edf 585 $res->{$chain} = "unknown";
09d5f68e 586 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 587 my ($chain, $sig) = ($1, $2);
de2a57cd 588 return if !&$is_pvefw_chain($chain);
3fa83edf 589 $res->{$chain} = $sig;
de2a57cd
DM		 590 } else {
591 # simply ignore the rest
592 return;
593 }
594 };
595
596 run_command("/sbin/iptables-save", outfunc => $parser);
597
de2a57cd
DM		 598 return $res;
599}
600
3a616aa0
AD		 601sub iptables_chain_exist {
602 my ($chain) = @_;
603
604 eval{
605 iptables("-n --list $chain");
606 };
607 return undef if $@;
608
609 return 1;
610}
611
612sub iptables_rule_exist {
613 my ($rule) = @_;
614
615 eval{
616 iptables("-C $rule");
617 };
618 return undef if $@;
619
620 return 1;
621}
622
3fa83edf 623sub ruleset_generate_rule {
4e6112f9 624 my ($ruleset, $chain, $rule, $goto) = @_;
3a616aa0 625
3fa83edf 626 my $cmd = '';
3a616aa0 627
d6de1dc2 628 $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
3a616aa0 629 $cmd .= " -s $rule->{source}" if $rule->{source};
d6de1dc2 630 $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
8c32a215 631 $cmd .= " -d $rule->{dest}" if $rule->{dest};
3a616aa0 632 $cmd .= " -p $rule->{proto}" if $rule->{proto};
4b586518
DM		 633
634 if (($rule->{nbdport} && $rule->{nbdport} > 1) ||
635 ($rule->{nbsport} && $rule->{nbsport} > 1)) {
636 $cmd .= " --match multiport"
637 }
638
639 if ($rule->{dport}) {
640 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
641 # Note: we use dport to store --icmp-type
642 die "unknown icmp-type\n" if !$icmp_type_names->{$rule->{dport}};
643 $cmd .= " -m icmp --icmp-type $rule->{dport}";
644 } else {
645 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
646 $cmd .= " --dports $rule->{dport}";
647 } else {
648 $cmd .= " --dport $rule->{dport}";
649 }
650 }
651 }
652
653 if ($rule->{sport}) {
654 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
655 $cmd .= " --sports $rule->{sport}";
656 } else {
657 $cmd .= " --sport $rule->{sport}";
658 }
659 }
660
661 $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 662
663 if (my $action = $rule->{action}) {
664 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
665 $cmd .= $goto ? " -g $action" : " -j $action";
666 };
3a616aa0 667
3fa83edf
DM		 668 ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
669}
670
671sub ruleset_create_chain {
672 my ($ruleset, $chain) = @_;
3a616aa0 673
d050c724
DM		 674 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
675
3fa83edf
DM		 676 die "chain '$chain' already exists\n" if $ruleset->{$chain};
677
678 $ruleset->{$chain} = [];
3a616aa0
AD		 679}
680
3fa83edf
DM		 681sub ruleset_chain_exist {
682 my ($ruleset, $chain) = @_;
3a616aa0 683
3fa83edf
DM		 684 return $ruleset->{$chain} ? 1 : undef;
685}
3a616aa0 686
3fa83edf
DM		 687sub ruleset_addrule {
688 my ($ruleset, $chain, $rule) = @_;
3a616aa0 689
3fa83edf 690 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 691
3fa83edf
DM		 692 push @{$ruleset->{$chain}}, "-A $chain $rule";
693}
3a616aa0 694
3fa83edf
DM		 695sub ruleset_insertrule {
696 my ($ruleset, $chain, $rule) = @_;
3a616aa0 697
3fa83edf 698 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 699
3fa83edf
DM		 700 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
701}
3a616aa0 702
3fa83edf
DM		 703sub generate_bridge_chains {
704 my ($ruleset, $bridge) = @_;
3a616aa0 705
dec84fcd
DM		 706 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
707 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
7fab95bc 708 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0
AD		 709 }
710
5927497d
DM		 711 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
712 ruleset_create_chain($ruleset, "$bridge-FW");
713 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
714 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
9fcad984
AD		 715 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
716 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
3fa83edf 717 }
3a616aa0 718
3fa83edf
DM		 719 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
720 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 721 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 722 }
723
724 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
725 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 726 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 727 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
3fa83edf
DM		 728 }
729}
3a616aa0
AD		 730
731sub generate_tap_rules_direction {
fa9c4a6f
DM		 732 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
733
734 my $rules = $vmfw_conf->{lc($direction)};
735 my $options = $vmfw_conf->{options};
3a616aa0
AD		 736
737 my $tapchain = "$iface-$direction";
738
3fa83edf 739 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 740
7fab95bc
DM		 741 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
742 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 743
c29f55c9
DM		 744 if ($direction eq 'OUT' && defined($macaddr)) {
745 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
746 }
747
3fa83edf 748 if ($rules) {
3a616aa0
AD		 749 foreach my $rule (@$rules) {
750 next if $rule->{iface} && $rule->{iface} ne $netid;
bfbfa8b6 751 # we go to $bridge-IN if accept in out rules
3a616aa0 752 if($rule->{action} =~ m/^(GROUP-(\S+))$/){
3fa83edf
DM		 753 $rule->{action} .= "-$direction";
754 # generate empty group rule if don't exist
755 if(!ruleset_chain_exist($ruleset, $rule->{action})){
51bae274 756 generate_group_rules($ruleset, $group_rules, $2);
3fa83edf 757 }
4e6112f9 758 ruleset_generate_rule($ruleset, $tapchain, $rule);
7b291cab 759 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
31ff3ef6 760 if $direction eq 'OUT';
4e6112f9 761 } else {
fdb0bf20 762 $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
4e6112f9 763 ruleset_generate_rule($ruleset, $tapchain, $rule);
3a616aa0 764 }
4e6112f9 765 }
3a616aa0
AD		 766 }
767
ccae0b50
DM		 768 # implement policy
769 my $policy;
770
771 if ($direction eq 'OUT') {
772 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
773 } else {
774 $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
775 }
776
777 if ($policy eq 'ACCEPT') {
778 if ($direction eq 'OUT') {
fdb0bf20 779 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
ccae0b50
DM		 780 } else {
781 ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
782 }
783 } elsif ($policy eq 'DROP') {
784 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
785 ruleset_addrule($ruleset, $tapchain, "-j DROP");
786 } elsif ($policy eq 'REJECT') {
787 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
788 ruleset_addrule($ruleset, $tapchain, "-j REJECT");
789 } else {
790 # should not happen
791 die "internal error: unknown policy '$policy'";
792 }
3a616aa0 793
3fa83edf
DM		 794 # plug the tap chain to bridge chain
795 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
796 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
797 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0 798
3fa83edf
DM		 799 if ($direction eq 'OUT'){
800 # add tap->host rules
801 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
dec84fcd 802 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
3a616aa0
AD		 803 }
804}
805
0bd5f137 806sub enablehostfw {
51bae274 807 my ($ruleset, $rules, $group_rules) = @_;
0bd5f137 808
51bae274 809 # fixme: allow security groups
0bd5f137 810
3fa83edf 811 # host inbound firewall
dec84fcd
DM		 812 my $chain = "PVEFW-HOST-IN";
813 ruleset_create_chain($ruleset, $chain);
0bd5f137 814
7fab95bc
DM		 815 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
816 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 817 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
818 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 819 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 820 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 821
3fa83edf
DM		 822 if ($rules->{in}) {
823 foreach my $rule (@{$rules->{in}}) {
824 # we use RETURN because we need to check also tap rules
825 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 826 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 827 }
0bd5f137
AD		 828 }
829
dec84fcd
DM		 830 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
831 ruleset_addrule($ruleset, $chain, "-j DROP");
0bd5f137 832
3fa83edf 833 # host outbound firewall
aadd745e 834 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 835 ruleset_create_chain($ruleset, $chain);
836
7fab95bc
DM		 837 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
838 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 839 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
840 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 841 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 842 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 843
3fa83edf
DM		 844 if ($rules->{out}) {
845 foreach my $rule (@{$rules->{out}}) {
846 # we use RETURN because we need to check also tap rules
847 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 848 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 849 }
0bd5f137
AD		 850 }
851
dec84fcd
DM		 852 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
853 ruleset_addrule($ruleset, $chain, "-j DROP");
6158271d 854
dec84fcd
DM		 855 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
856 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 857}
858
859sub generate_group_rules {
51bae274 860 my ($ruleset, $group_rules, $group) = @_;
9d31b418 861
51bae274 862 my $rules = $group_rules->{$group};
9d31b418 863
51bae274 864 die "no such security group '$group'\n" if !$rules;
6158271d 865
3fa83edf 866 my $chain = "GROUP-${group}-IN";
9d31b418 867
3fa83edf 868 ruleset_create_chain($ruleset, $chain);
9d31b418 869
3fa83edf
DM		 870 if ($rules->{in}) {
871 foreach my $rule (@{$rules->{in}}) {
872 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 873 }
874 }
875
3fa83edf 876 $chain = "GROUP-${group}-OUT";
9d31b418 877
3fa83edf 878 ruleset_create_chain($ruleset, $chain);
4e6112f9 879 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 880
3fa83edf
DM		 881 if ($rules->{out}) {
882 foreach my $rule (@{$rules->{out}}) {
6158271d
DM		 883 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
884 # check also other tap rules (and group rules can be set on any bridge,
4e6112f9
DM		 885 # so we can't go to VMBRXX-IN)
886 $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
6a6c7af7 887 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 888 }
889 }
9d31b418
AD		 890}
891
51bae274
DM		 892my $MAX_NETS = 32;
893my $valid_netdev_names = {};
894for (my $i = 0; $i < $MAX_NETS; $i++) {
895 $valid_netdev_names->{"net$i"} = 1;
896}
5e1267a5 897
51bae274
DM		 898sub parse_fw_rule {
899 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 900
a332200b 901 my $macros = get_firewall_macros();
fcba0beb 902 my $protocols = get_etc_protocols();
51bae274
DM		 903
904 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
905
906 $line =~ s/#.*$//;
907
908 my @data = split(/\s+/, $line);
909 my $expected_elements = $need_iface ? 7 : 6;
910
911 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
912
913 if ($need_iface) {
914 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
915 } else {
916 ($action, $source, $dest, $proto, $dport, $sport) = @data;
917 }
918
919 die "incomplete rule\n" if !$action;
920
961b4928
DM		 921 my $macro;
922 my $macro_name;
923
51bae274
DM		 924 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
925 # OK
926 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
927 # OK
928 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
961b4928
DM		 929 ($macro_name, $action) = ($1, $2);
930 my $lc_macro_name = lc($macro_name);
931 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
932 $macro_name = $preferred_name if $preferred_name;
933 $macro = $macros->{$lc_macro_name};
934 die "unknown macro '$macro_name'\n" if !$macro;
51bae274
DM		 935 } else {
936 die "unknown action '$action'\n";
937 }
938
939 if ($need_iface) {
940 $iface = undef if $iface && $iface eq '-';
6158271d 941 die "unknown interface '$iface'\n"
51bae274
DM		 942 if defined($iface) && !$valid_netdev_names->{$iface};
943 }
944
945 $proto = undef if $proto && $proto eq '-';
6158271d 946 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 947 !(defined($protocols->{byname}->{$proto}) ||
948 defined($protocols->{byid}->{$proto}));
949
950 $source = undef if $source && $source eq '-';
951 $dest = undef if $dest && $dest eq '-';
952
953 $dport = undef if $dport && $dport eq '-';
954 $sport = undef if $sport && $sport eq '-';
955
51bae274
DM		 956 my $nbsource = undef;
957 my $nbdest = undef;
958
959 $nbsource = parse_address_list($source) if $source;
960 $nbdest = parse_address_list($dest) if $dest;
6158271d 961
961b4928 962 my $rules = [];
51bae274 963
961b4928 964 my $param = {
51bae274 965 action => $action,
51bae274
DM		 966 iface => $iface,
967 source => $source,
968 dest => $dest,
969 nbsource => $nbsource,
970 nbdest => $nbdest,
971 proto => $proto,
972 dport => $dport,
973 sport => $sport,
51bae274 974 };
961b4928
DM		 975
976 if ($macro) {
977 foreach my $templ (@$macro) {
978 my $rule = {};
979 foreach my $k (keys %$templ) {
980 my $v = $templ->{$k};
857f62c8
DM		 981 if ($v eq 'PARAM') {
982 $v = $param->{$k};
983 } elsif ($v eq 'DEST') {
984 $v = $param->{dest};
985 } elsif ($v eq 'SOURCE') {
986 $v = $param->{source};
987 }
988
961b4928
DM		 989 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
990 $rule->{$k} = $v;
991 }
992 push @$rules, $rule;
993 }
994 } else {
995 push @$rules, $param;
996 }
997
998 foreach my $rule (@$rules) {
6158271d 999 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1000 if defined($rule->{dport});
6158271d 1001 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1002 if defined($rule->{sport});
1003 }
1004
1005 return $rules;
51bae274
DM		 1006}
1007
85c6eaed
DM		 1008sub parse_fw_option {
1009 my ($line) = @_;
1010
1011 my ($opt, $value);
1012
1013 if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
1014 $opt = 'enable';
1015 $value = int($1);
1016 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1017 $opt = lc($1);
1018 $value = uc($3);
1019 } else {
1020 chomp $line;
1021 die "can't parse option '$line'\n"
1022 }
1023
1024 return ($opt, $value);
1025}
1026
51bae274
DM		 1027sub parse_vm_fw_rules {
1028 my ($filename, $fh) = @_;
1029
85c6eaed 1030 my $res = { in => [], out => [], options => {}};
51bae274
DM		 1031
1032 my $section;
1033
5e1267a5
DM		 1034 while (defined(my $line = <$fh>)) {
1035 next if $line =~ m/^#/;
1036 next if $line =~ m/^\s*$/;
1037
961b4928
DM		 1038 my $linenr = $fh->input_line_number();
1039 my $prefix = "$filename (line $linenr)";
1040
85c6eaed 1041 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1042 $section = lc($1);
85c6eaed 1043 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1044 next;
1045 }
51bae274 1046 if (!$section) {
961b4928 1047 warn "$prefix: skip line - no section";
5e1267a5
DM		 1048 next;
1049 }
1050
85c6eaed
DM		 1051 next if !$res->{$section}; # skip undefined section
1052
1053 if ($section eq 'options') {
6158271d
DM		 1054 eval {
1055 my ($opt, $value) = parse_fw_option($line);
85c6eaed
DM		 1056 $res->{options}->{$opt} = $value;
1057 };
1058 warn "$prefix: $@" if $@;
1059 next;
1060 }
1061
961b4928
DM		 1062 my $rules;
1063 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1064 if (my $err = $@) {
961b4928 1065 warn "$prefix: $err";
5e1267a5
DM		 1066 next;
1067 }
1068
961b4928 1069 push @{$res->{$section}}, @$rules;
51bae274
DM		 1070 }
1071
1072 return $res;
1073}
1074
1075sub parse_host_fw_rules {
1076 my ($filename, $fh) = @_;
1077
1078 my $res = { in => [], out => [] };
1079
1080 my $section;
1081
1082 while (defined(my $line = <$fh>)) {
1083 next if $line =~ m/^#/;
1084 next if $line =~ m/^\s*$/;
1085
961b4928
DM		 1086 my $linenr = $fh->input_line_number();
1087 my $prefix = "$filename (line $linenr)";
1088
51bae274
DM		 1089 if ($line =~ m/^\[(in|out)\]\s*$/i) {
1090 $section = lc($1);
5e1267a5
DM		 1091 next;
1092 }
51bae274 1093 if (!$section) {
961b4928 1094 warn "$prefix: skip line - no section";
5e1267a5
DM		 1095 next;
1096 }
1097
961b4928
DM		 1098 my $rules;
1099 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1100 if (my $err = $@) {
961b4928 1101 warn "$prefix: $err";
ecbea048 1102 next;
ecbea048
DM		 1103 }
1104
961b4928 1105 push @{$res->{$section}}, @$rules;
51bae274 1106 }
ecbea048 1107
51bae274
DM		 1108 return $res;
1109}
4cdbb3b7 1110
51bae274
DM		 1111sub parse_group_fw_rules {
1112 my ($filename, $fh) = @_;
5e1267a5 1113
51bae274
DM		 1114 my $section;
1115 my $group;
1116
1117 my $res = { in => [], out => [] };
6158271d 1118
51bae274
DM		 1119 while (defined(my $line = <$fh>)) {
1120 next if $line =~ m/^#/;
1121 next if $line =~ m/^\s*$/;
1122
961b4928
DM		 1123 my $linenr = $fh->input_line_number();
1124 my $prefix = "$filename (line $linenr)";
1125
51bae274
DM		 1126 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1127 $section = lc($1);
1128 $group = lc($2);
1129 next;
1130 }
1131 if (!$section || !$group) {
961b4928 1132 warn "$prefix: skip line - no section";
51bae274
DM		 1133 next;
1134 }
1135
961b4928
DM		 1136 my $rules;
1137 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1138 if (my $err = $@) {
961b4928 1139 warn "$prefix: $err";
51bae274
DM		 1140 next;
1141 }
1142
961b4928 1143 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1144 }
1145
1146 return $res;
1147}
1148
06320eb0
DM		 1149sub run_locked {
1150 my ($code, @param) = @_;
1151
1152 my $timeout = 10;
1153
1154 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1155
1156 die $@ if $@;
1157
1158 return $res;
1159}
1160
5e1267a5
DM		 1161sub read_local_vm_config {
1162
1163 my $openvz = {};
1164
1165 my $qemu = {};
1166
1167 my $list = PVE::QemuServer::config_list();
1168
1169 foreach my $vmid (keys %$list) {
5e1267a5
DM		 1170 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1171 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1172 $qemu->{$vmid} = $conf;
1173 }
1174 }
1175
1176 my $vmdata = { openvz => $openvz, qemu => $qemu };
1177
1178 return $vmdata;
1179};
1180
1181sub read_vm_firewall_rules {
1182 my ($vmdata) = @_;
1183 my $rules = {};
1184 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1185 my $filename = "/etc/pve/firewall/$vmid.fw";
1186 my $fh = IO::File->new($filename, O_RDONLY);
1187 next if !$fh;
1188
51bae274 1189 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1190 }
1191
1192 return $rules;
1193}
1194
d8f2505e
DM		 1195sub generate_std_chains {
1196 my ($ruleset) = @_;
1197
1198 foreach my $chain (keys %$pve_std_chains) {
1199 ruleset_create_chain($ruleset, $chain);
1200 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1201 if (ref($rule)) {
1202 ruleset_generate_rule($ruleset, $chain, $rule);
1203 } else {
1204 ruleset_addrule($ruleset, $chain, $rule);
1205 }
1206 }
1207 }
1208}
1209
5e1267a5 1210sub compile {
5e1267a5
DM		 1211 my $vmdata = read_local_vm_config();
1212 my $rules = read_vm_firewall_rules($vmdata);
6158271d 1213
51bae274
DM		 1214 my $group_rules = {};
1215 my $filename = "/etc/pve/firewall/groups.fw";
1216 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1217 $group_rules = parse_group_fw_rules($filename, $fh);
1218 }
5e1267a5 1219
3fa83edf
DM		 1220 #print Dumper($rules);
1221
1222 my $ruleset = {};
1223
dec84fcd
DM		 1224 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1225 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
fadb13dd 1226 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1227
d8f2505e 1228 generate_std_chains($ruleset);
4e6112f9 1229
fadb13dd 1230 my $enable_hostfw = 0;
51bae274
DM		 1231 $filename = "/etc/pve/local/host.fw";
1232 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1233 my $host_rules = parse_host_fw_rules($filename, $fh);
fadb13dd
DM		 1234
1235 $enable_hostfw = 1;
1236
51bae274
DM		 1237 enablehostfw($ruleset, $host_rules, $group_rules);
1238 }
3fa83edf 1239
6158271d 1240 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1241 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1242 my $conf = $vmdata->{qemu}->{$vmid};
fa9c4a6f
DM		 1243 my $vmfw_conf = $rules->{$vmid};
1244 next if !$vmfw_conf;
1245 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1246
1247 foreach my $netid (keys %$conf) {
1248 next if $netid !~ m/^net(\d+)$/;
1249 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1250 next if !$net;
1251 my $iface = "tap${vmid}i$1";
5e1267a5 1252
3fa83edf
DM		 1253 my $bridge = $net->{bridge};
1254 next if !$bridge; # fixme: ?
1255
1256 $bridge .= "v$net->{tag}" if $net->{tag};
1257
fadb13dd 1258
3fa83edf
DM		 1259 generate_bridge_chains($ruleset, $bridge);
1260
c29f55c9 1261 my $macaddr = $net->{macaddr};
fa9c4a6f
DM		 1262 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1263 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1264 }
1265 }
c0413e35 1266
fadb13dd
DM		 1267 if ($enable_hostfw) {
1268 # allow traffic from lo (ourself)
1269 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1270 }
c0413e35 1271
3fa83edf
DM		 1272 return $ruleset;
1273}
1274
1275sub get_ruleset_status {
1276 my ($ruleset, $verbose) = @_;
1277
1278 my $active_chains = iptables_get_chains();
1279
1280 my $statushash = {};
1281
1282 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1283 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1284 foreach my $cmd (@{$ruleset->{$chain}}) {
1285 $digest->add("$cmd\n");
1286 }
1287 my $sig = $digest->b64digest;
1288 $statushash->{$chain}->{sig} = $sig;
1289
1290 my $oldsig = $active_chains->{$chain};
1291 if (!defined($oldsig)) {
1292 $statushash->{$chain}->{action} = 'create';
1293 } else {
1294 if ($oldsig eq $sig) {
1295 $statushash->{$chain}->{action} = 'exists';
1296 } else {
1297 $statushash->{$chain}->{action} = 'update';
1298 }
1299 }
1300 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1301 foreach my $cmd (@{$ruleset->{$chain}}) {
1302 print "\t$cmd\n" if $verbose;
1303 }
1304 }
1305
1306 foreach my $chain (sort keys %$active_chains) {
1307 if (!defined($ruleset->{$chain})) {
1308 my $sig = $active_chains->{$chain};
1309 $statushash->{$chain}->{action} = 'delete';
1310 $statushash->{$chain}->{sig} = $sig;
1311 print "delete $chain ($sig)\n" if $verbose;
1312 }
6158271d 1313 }
3fa83edf
DM		 1314
1315 return $statushash;
1316}
1317
1318sub print_ruleset {
1319 my ($ruleset) = @_;
1320
1321 get_ruleset_status($ruleset, 1);
1322}
1323
1324sub print_sig_rule {
1325 my ($chain, $sig) = @_;
1326
09d5f68e
DM		 1327 # We just use this to store a SHA1 checksum used to detect changes
1328 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1329}
1330
a84f4d96
DM		 1331sub apply_ruleset {
1332 my ($ruleset, $verbose) = @_;
3fa83edf 1333
a84f4d96 1334 enable_bridge_firewall();
3fa83edf
DM		 1335
1336 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1337
1338 my $statushash = get_ruleset_status($ruleset, $verbose);
1339
1340 # create missing chains first
1341 foreach my $chain (sort keys %$ruleset) {
1342 my $stat = $statushash->{$chain};
1343 die "internal error" if !$stat;
1344 next if $stat->{action} ne 'create';
886aba9c 1345
3fa83edf
DM		 1346 $cmdlist .= ":$chain - [0:0]\n";
1347 }
1348
dec84fcd 1349 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1350 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1351 $cmdlist .= "-A $rule\n";
1352 }
dec84fcd 1353 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1354 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1355 $cmdlist .= "-A $rule\n";
1356 }
1357
dec84fcd 1358 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1359 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1360 $cmdlist .= "-A $rule\n";
1361 }
1362
1363 foreach my $chain (sort keys %$ruleset) {
1364 my $stat = $statushash->{$chain};
1365 die "internal error" if !$stat;
1366
1367 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1368 $cmdlist .= "-F $chain\n";
1369 foreach my $cmd (@{$ruleset->{$chain}}) {
1370 $cmdlist .= "$cmd\n";
1371 }
1372 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1373 } elsif ($stat->{action} eq 'delete') {
f5d28682 1374 die "internal error"; # this should not happen
3fa83edf
DM		 1375 } elsif ($stat->{action} eq 'exists') {
1376 # do nothing
1377 } else {
1378 die "internal error - unknown status '$stat->{action}'";
1379 }
1380 }
1381
f5d28682
DM		 1382 foreach my $chain (keys %$statushash) {
1383 next if $statushash->{$chain}->{action} ne 'delete';
1384 $cmdlist .= "-F $chain\n";
1385 }
1386 foreach my $chain (keys %$statushash) {
1387 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1388 next if $chain eq 'PVEFW-INPUT';
1389 next if $chain eq 'PVEFW-OUTPUT';
1390 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1391 $cmdlist .= "-X $chain\n";
1392 }
1393
3fa83edf
DM		 1394 $cmdlist .= "COMMIT\n";
1395
1396 print $cmdlist if $verbose;
1397
1398 iptables_restore_cmdlist($cmdlist);
1399
6158271d 1400 # test: re-read status and check if everything is up to date
3fa83edf
DM		 1401 $statushash = get_ruleset_status($ruleset);
1402
1403 my $errors;
1404 foreach my $chain (sort keys %$ruleset) {
1405 my $stat = $statushash->{$chain};
1406 if ($stat->{action} ne 'exists') {
1407 warn "unable to update chain '$chain'\n";
1408 $errors = 1;
1409 }
1410 }
b6360c3f 1411
3fa83edf 1412 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1413}
1414
b6360c3f 14151;
Firewall test scripts