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cleanups
[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
a332200b 351sub get_firewall_macros {
9aab3127 352
961b4928 353 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 354
961b4928 355 $pve_fw_parsed_macros = {};
9aab3127 356
961b4928
DM		 357 foreach my $k (keys %$pve_fw_macros) {
358 my $name = lc($k);
a332200b 359
961b4928
DM		 360 my $macro = $pve_fw_macros->{$k};
361 $pve_fw_preferred_macro_names->{$name} = $k;
362 $pve_fw_parsed_macros->{$name} = $macro;
363 }
a332200b 364
961b4928 365 return $pve_fw_parsed_macros;
9aab3127
DM		 366}
367
fcba0beb
DM		 368my $etc_services;
369
370sub get_etc_services {
371
372 return $etc_services if $etc_services;
373
374 my $filename = "/etc/services";
375
376 my $fh = IO::File->new($filename, O_RDONLY);
377 if (!$fh) {
378 warn "unable to read '$filename' - $!\n";
379 return {};
380 }
381
382 my $services = {};
383
384 while (my $line = <$fh>) {
385 chomp ($line);
386 next if $line =~m/^#/;
387 next if ($line =~m/^\s*$/);
388
389 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
390 $services->{byid}->{$2}->{name} = $1;
35b66e9d 391 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 392 $services->{byid}->{$2}->{$3} = 1;
393 $services->{byname}->{$1} = $services->{byid}->{$2};
394 }
395 }
396
397 close($fh);
398
6158271d
DM		 399 $etc_services = $services;
400
3a616aa0 401
fcba0beb
DM		 402 return $etc_services;
403}
404
405my $etc_protocols;
406
407sub get_etc_protocols {
408 return $etc_protocols if $etc_protocols;
409
410 my $filename = "/etc/protocols";
411
412 my $fh = IO::File->new($filename, O_RDONLY);
413 if (!$fh) {
414 warn "unable to read '$filename' - $!\n";
415 return {};
416 }
417
418 my $protocols = {};
419
420 while (my $line = <$fh>) {
421 chomp ($line);
422 next if $line =~m/^#/;
423 next if ($line =~m/^\s*$/);
424
425 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
426 $protocols->{byid}->{$2}->{name} = $1;
427 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
428 }
429 }
430
431 close($fh);
432
433 $etc_protocols = $protocols;
434
435 return $etc_protocols;
436}
437
ecbea048
DM		 438sub parse_address_list {
439 my ($str) = @_;
440
d6de1dc2 441 my $nbaor = 0;
ecbea048
DM		 442 foreach my $aor (split(/,/, $str)) {
443 if (!Net::IP->new($aor)) {
444 my $err = Net::IP::Error();
445 die "invalid IP address: $err\n";
d6de1dc2
AD		 446 }else{
447 $nbaor++;
ecbea048
DM		 448 }
449 }
d6de1dc2 450 return $nbaor;
ecbea048 451}
dddd9413 452
fcba0beb
DM		 453sub parse_port_name_number_or_range {
454 my ($str) = @_;
455
456 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 457 my $nbports = 0;
fcba0beb 458 foreach my $item (split(/,/, $str)) {
4cdbb3b7 459 my $portlist = "";
35b66e9d 460 my $oldpon = undef;
fcba0beb 461 foreach my $pon (split(':', $item, 2)) {
35b66e9d 462 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 463 if ($pon =~ m/^\d+$/){
857f62c8 464 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 465 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
466 $oldpon = $pon;
4cdbb3b7
AD		 467 }else{
468 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
469 }
470 $nbports++;
fcba0beb
DM		 471 }
472 }
473
4cdbb3b7 474 return ($nbports);
fcba0beb
DM		 475}
476
780bcc0f
DM		 477my $bridge_firewall_enabled = 0;
478
479sub enable_bridge_firewall {
480
481 return if $bridge_firewall_enabled; # only once
482
483 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
484 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
485
486 $bridge_firewall_enabled = 1;
487}
488
8cebfa6f 489my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 490
3a616aa0
AD		 491sub iptables {
492 my ($cmd) = @_;
493
494 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
495}
496
b16e818e
DM		 497sub iptables_restore_cmdlist {
498 my ($cmdlist) = @_;
3a616aa0 499
3fa83edf 500 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 501}
502
de2a57cd
DM		 503sub iptables_get_chains {
504
505 my $res = {};
506
507 # check what chains we want to track
508 my $is_pvefw_chain = sub {
509 my $name = shift;
510
dec84fcd
DM		 511 return 1 if $name =~ m/^PVEFW-\S+$/;
512
de2a57cd 513 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
5927497d 514 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 515 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 516
517 return undef;
518 };
519
520 my $table = '';
521
de2a57cd
DM		 522 my $parser = sub {
523 my $line = shift;
524
525 return if $line =~ m/^#/;
526 return if $line =~ m/^\s*$/;
527
528 if ($line =~ m/^\*(\S+)$/) {
529 $table = $1;
530 return;
531 }
532
533 return if $table ne 'filter';
534
535 if ($line =~ m/^:(\S+)\s/) {
536 my $chain = $1;
537 return if !&$is_pvefw_chain($chain);
3fa83edf 538 $res->{$chain} = "unknown";
09d5f68e 539 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 540 my ($chain, $sig) = ($1, $2);
de2a57cd 541 return if !&$is_pvefw_chain($chain);
3fa83edf 542 $res->{$chain} = $sig;
de2a57cd
DM		 543 } else {
544 # simply ignore the rest
545 return;
546 }
547 };
548
549 run_command("/sbin/iptables-save", outfunc => $parser);
550
de2a57cd
DM		 551 return $res;
552}
553
3a616aa0
AD		 554sub iptables_chain_exist {
555 my ($chain) = @_;
556
557 eval{
558 iptables("-n --list $chain");
559 };
560 return undef if $@;
561
562 return 1;
563}
564
565sub iptables_rule_exist {
566 my ($rule) = @_;
567
568 eval{
569 iptables("-C $rule");
570 };
571 return undef if $@;
572
573 return 1;
574}
575
3fa83edf 576sub ruleset_generate_rule {
4e6112f9 577 my ($ruleset, $chain, $rule, $goto) = @_;
3a616aa0 578
3fa83edf 579 my $cmd = '';
3a616aa0 580
d6de1dc2 581 $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
3a616aa0 582 $cmd .= " -s $rule->{source}" if $rule->{source};
d6de1dc2 583 $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
8c32a215 584 $cmd .= " -d $rule->{dest}" if $rule->{dest};
3a616aa0 585 $cmd .= " -p $rule->{proto}" if $rule->{proto};
4cdbb3b7 586 $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1;
3a616aa0 587 $cmd .= " --dport $rule->{dport}" if $rule->{dport};
4cdbb3b7 588 $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1;
3a616aa0 589 $cmd .= " --sport $rule->{sport}" if $rule->{sport};
4e6112f9
DM		 590
591 if (my $action = $rule->{action}) {
592 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
593 $cmd .= $goto ? " -g $action" : " -j $action";
594 };
3a616aa0 595
3fa83edf
DM		 596 ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
597}
598
599sub ruleset_create_chain {
600 my ($ruleset, $chain) = @_;
3a616aa0 601
d050c724
DM		 602 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
603
3fa83edf
DM		 604 die "chain '$chain' already exists\n" if $ruleset->{$chain};
605
606 $ruleset->{$chain} = [];
3a616aa0
AD		 607}
608
3fa83edf
DM		 609sub ruleset_chain_exist {
610 my ($ruleset, $chain) = @_;
3a616aa0 611
3fa83edf
DM		 612 return $ruleset->{$chain} ? 1 : undef;
613}
3a616aa0 614
3fa83edf
DM		 615sub ruleset_addrule {
616 my ($ruleset, $chain, $rule) = @_;
3a616aa0 617
3fa83edf 618 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 619
3fa83edf
DM		 620 push @{$ruleset->{$chain}}, "-A $chain $rule";
621}
3a616aa0 622
3fa83edf
DM		 623sub ruleset_insertrule {
624 my ($ruleset, $chain, $rule) = @_;
3a616aa0 625
3fa83edf 626 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 627
3fa83edf
DM		 628 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
629}
3a616aa0 630
3fa83edf
DM		 631sub generate_bridge_chains {
632 my ($ruleset, $bridge) = @_;
3a616aa0 633
dec84fcd
DM		 634 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
635 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
7fab95bc 636 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0
AD		 637 }
638
5927497d
DM		 639 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
640 ruleset_create_chain($ruleset, "$bridge-FW");
641 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
642 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
9fcad984
AD		 643 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
644 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
3fa83edf 645 }
3a616aa0 646
3fa83edf
DM		 647 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
648 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 649 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 650 }
651
652 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
653 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 654 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 655 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
3fa83edf
DM		 656 }
657}
3a616aa0
AD		 658
659sub generate_tap_rules_direction {
fa9c4a6f
DM		 660 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
661
662 my $rules = $vmfw_conf->{lc($direction)};
663 my $options = $vmfw_conf->{options};
3a616aa0
AD		 664
665 my $tapchain = "$iface-$direction";
666
3fa83edf 667 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 668
7fab95bc
DM		 669 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
670 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 671
c29f55c9
DM		 672 if ($direction eq 'OUT' && defined($macaddr)) {
673 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
674 }
675
3fa83edf 676 if ($rules) {
3a616aa0
AD		 677 foreach my $rule (@$rules) {
678 next if $rule->{iface} && $rule->{iface} ne $netid;
bfbfa8b6 679 # we go to $bridge-IN if accept in out rules
3a616aa0 680 if($rule->{action} =~ m/^(GROUP-(\S+))$/){
3fa83edf
DM		 681 $rule->{action} .= "-$direction";
682 # generate empty group rule if don't exist
683 if(!ruleset_chain_exist($ruleset, $rule->{action})){
51bae274 684 generate_group_rules($ruleset, $group_rules, $2);
3fa83edf 685 }
4e6112f9 686 ruleset_generate_rule($ruleset, $tapchain, $rule);
7b291cab 687 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
31ff3ef6 688 if $direction eq 'OUT';
4e6112f9 689 } else {
fdb0bf20 690 $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
4e6112f9 691 ruleset_generate_rule($ruleset, $tapchain, $rule);
3a616aa0 692 }
4e6112f9 693 }
3a616aa0
AD		 694 }
695
ccae0b50
DM		 696 # implement policy
697 my $policy;
698
699 if ($direction eq 'OUT') {
700 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
701 } else {
702 $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
703 }
704
705 if ($policy eq 'ACCEPT') {
706 if ($direction eq 'OUT') {
fdb0bf20 707 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
ccae0b50
DM		 708 } else {
709 ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
710 }
711 } elsif ($policy eq 'DROP') {
712 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
713 ruleset_addrule($ruleset, $tapchain, "-j DROP");
714 } elsif ($policy eq 'REJECT') {
715 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
716 ruleset_addrule($ruleset, $tapchain, "-j REJECT");
717 } else {
718 # should not happen
719 die "internal error: unknown policy '$policy'";
720 }
3a616aa0 721
3fa83edf
DM		 722 # plug the tap chain to bridge chain
723 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
724 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
725 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0 726
3fa83edf
DM		 727 if ($direction eq 'OUT'){
728 # add tap->host rules
729 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
dec84fcd 730 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
3a616aa0
AD		 731 }
732}
733
0bd5f137 734sub enablehostfw {
51bae274 735 my ($ruleset, $rules, $group_rules) = @_;
0bd5f137 736
51bae274 737 # fixme: allow security groups
0bd5f137 738
3fa83edf 739 # host inbound firewall
dec84fcd
DM		 740 my $chain = "PVEFW-HOST-IN";
741 ruleset_create_chain($ruleset, $chain);
0bd5f137 742
7fab95bc
DM		 743 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
744 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 745 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
746 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 747 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 748 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 749
3fa83edf
DM		 750 if ($rules->{in}) {
751 foreach my $rule (@{$rules->{in}}) {
752 # we use RETURN because we need to check also tap rules
753 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 754 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 755 }
0bd5f137
AD		 756 }
757
dec84fcd
DM		 758 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
759 ruleset_addrule($ruleset, $chain, "-j DROP");
0bd5f137 760
3fa83edf 761 # host outbound firewall
aadd745e 762 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 763 ruleset_create_chain($ruleset, $chain);
764
7fab95bc
DM		 765 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
766 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 767 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
768 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 769 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 770 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 771
3fa83edf
DM		 772 if ($rules->{out}) {
773 foreach my $rule (@{$rules->{out}}) {
774 # we use RETURN because we need to check also tap rules
775 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 776 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 777 }
0bd5f137
AD		 778 }
779
dec84fcd
DM		 780 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
781 ruleset_addrule($ruleset, $chain, "-j DROP");
6158271d 782
dec84fcd
DM		 783 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
784 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 785}
786
787sub generate_group_rules {
51bae274 788 my ($ruleset, $group_rules, $group) = @_;
9d31b418 789
51bae274 790 my $rules = $group_rules->{$group};
9d31b418 791
51bae274 792 die "no such security group '$group'\n" if !$rules;
6158271d 793
3fa83edf 794 my $chain = "GROUP-${group}-IN";
9d31b418 795
3fa83edf 796 ruleset_create_chain($ruleset, $chain);
9d31b418 797
3fa83edf
DM		 798 if ($rules->{in}) {
799 foreach my $rule (@{$rules->{in}}) {
800 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 801 }
802 }
803
3fa83edf 804 $chain = "GROUP-${group}-OUT";
9d31b418 805
3fa83edf 806 ruleset_create_chain($ruleset, $chain);
4e6112f9 807 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 808
3fa83edf
DM		 809 if ($rules->{out}) {
810 foreach my $rule (@{$rules->{out}}) {
6158271d
DM		 811 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
812 # check also other tap rules (and group rules can be set on any bridge,
4e6112f9
DM		 813 # so we can't go to VMBRXX-IN)
814 $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
6a6c7af7 815 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 816 }
817 }
9d31b418
AD		 818}
819
51bae274
DM		 820my $MAX_NETS = 32;
821my $valid_netdev_names = {};
822for (my $i = 0; $i < $MAX_NETS; $i++) {
823 $valid_netdev_names->{"net$i"} = 1;
824}
5e1267a5 825
51bae274
DM		 826sub parse_fw_rule {
827 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 828
a332200b 829 my $macros = get_firewall_macros();
fcba0beb 830 my $protocols = get_etc_protocols();
51bae274
DM		 831
832 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
833
834 $line =~ s/#.*$//;
835
836 my @data = split(/\s+/, $line);
837 my $expected_elements = $need_iface ? 7 : 6;
838
839 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
840
841 if ($need_iface) {
842 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
843 } else {
844 ($action, $source, $dest, $proto, $dport, $sport) = @data;
845 }
846
847 die "incomplete rule\n" if !$action;
848
961b4928
DM		 849 my $macro;
850 my $macro_name;
851
51bae274
DM		 852 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
853 # OK
854 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
855 # OK
856 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
961b4928
DM		 857 ($macro_name, $action) = ($1, $2);
858 my $lc_macro_name = lc($macro_name);
859 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
860 $macro_name = $preferred_name if $preferred_name;
861 $macro = $macros->{$lc_macro_name};
862 die "unknown macro '$macro_name'\n" if !$macro;
51bae274
DM		 863 } else {
864 die "unknown action '$action'\n";
865 }
866
867 if ($need_iface) {
868 $iface = undef if $iface && $iface eq '-';
6158271d 869 die "unknown interface '$iface'\n"
51bae274
DM		 870 if defined($iface) && !$valid_netdev_names->{$iface};
871 }
872
873 $proto = undef if $proto && $proto eq '-';
6158271d 874 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 875 !(defined($protocols->{byname}->{$proto}) ||
876 defined($protocols->{byid}->{$proto}));
877
878 $source = undef if $source && $source eq '-';
879 $dest = undef if $dest && $dest eq '-';
880
881 $dport = undef if $dport && $dport eq '-';
882 $sport = undef if $sport && $sport eq '-';
883
51bae274
DM		 884 my $nbsource = undef;
885 my $nbdest = undef;
886
887 $nbsource = parse_address_list($source) if $source;
888 $nbdest = parse_address_list($dest) if $dest;
6158271d 889
961b4928 890 my $rules = [];
51bae274 891
961b4928 892 my $param = {
51bae274 893 action => $action,
51bae274
DM		 894 iface => $iface,
895 source => $source,
896 dest => $dest,
897 nbsource => $nbsource,
898 nbdest => $nbdest,
899 proto => $proto,
900 dport => $dport,
901 sport => $sport,
51bae274 902 };
961b4928
DM		 903
904 if ($macro) {
905 foreach my $templ (@$macro) {
906 my $rule = {};
907 foreach my $k (keys %$templ) {
908 my $v = $templ->{$k};
857f62c8
DM		 909 if ($v eq 'PARAM') {
910 $v = $param->{$k};
911 } elsif ($v eq 'DEST') {
912 $v = $param->{dest};
913 } elsif ($v eq 'SOURCE') {
914 $v = $param->{source};
915 }
916
961b4928
DM		 917 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
918 $rule->{$k} = $v;
919 }
920 push @$rules, $rule;
921 }
922 } else {
923 push @$rules, $param;
924 }
925
926 foreach my $rule (@$rules) {
6158271d 927 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 928 if defined($rule->{dport});
6158271d 929 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 930 if defined($rule->{sport});
931 }
932
933 return $rules;
51bae274
DM		 934}
935
85c6eaed
DM		 936sub parse_fw_option {
937 my ($line) = @_;
938
939 my ($opt, $value);
940
941 if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
942 $opt = 'enable';
943 $value = int($1);
944 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
945 $opt = lc($1);
946 $value = uc($3);
947 } else {
948 chomp $line;
949 die "can't parse option '$line'\n"
950 }
951
952 return ($opt, $value);
953}
954
51bae274
DM		 955sub parse_vm_fw_rules {
956 my ($filename, $fh) = @_;
957
85c6eaed 958 my $res = { in => [], out => [], options => {}};
51bae274
DM		 959
960 my $section;
961
5e1267a5
DM		 962 while (defined(my $line = <$fh>)) {
963 next if $line =~ m/^#/;
964 next if $line =~ m/^\s*$/;
965
961b4928
DM		 966 my $linenr = $fh->input_line_number();
967 my $prefix = "$filename (line $linenr)";
968
85c6eaed 969 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 970 $section = lc($1);
85c6eaed 971 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 972 next;
973 }
51bae274 974 if (!$section) {
961b4928 975 warn "$prefix: skip line - no section";
5e1267a5
DM		 976 next;
977 }
978
85c6eaed
DM		 979 next if !$res->{$section}; # skip undefined section
980
981 if ($section eq 'options') {
6158271d
DM		 982 eval {
983 my ($opt, $value) = parse_fw_option($line);
85c6eaed
DM		 984 $res->{options}->{$opt} = $value;
985 };
986 warn "$prefix: $@" if $@;
987 next;
988 }
989
961b4928
DM		 990 my $rules;
991 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 992 if (my $err = $@) {
961b4928 993 warn "$prefix: $err";
5e1267a5
DM		 994 next;
995 }
996
961b4928 997 push @{$res->{$section}}, @$rules;
51bae274
DM		 998 }
999
1000 return $res;
1001}
1002
1003sub parse_host_fw_rules {
1004 my ($filename, $fh) = @_;
1005
1006 my $res = { in => [], out => [] };
1007
1008 my $section;
1009
1010 while (defined(my $line = <$fh>)) {
1011 next if $line =~ m/^#/;
1012 next if $line =~ m/^\s*$/;
1013
961b4928
DM		 1014 my $linenr = $fh->input_line_number();
1015 my $prefix = "$filename (line $linenr)";
1016
51bae274
DM		 1017 if ($line =~ m/^\[(in|out)\]\s*$/i) {
1018 $section = lc($1);
5e1267a5
DM		 1019 next;
1020 }
51bae274 1021 if (!$section) {
961b4928 1022 warn "$prefix: skip line - no section";
5e1267a5
DM		 1023 next;
1024 }
1025
961b4928
DM		 1026 my $rules;
1027 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1028 if (my $err = $@) {
961b4928 1029 warn "$prefix: $err";
ecbea048 1030 next;
ecbea048
DM		 1031 }
1032
961b4928 1033 push @{$res->{$section}}, @$rules;
51bae274 1034 }
ecbea048 1035
51bae274
DM		 1036 return $res;
1037}
4cdbb3b7 1038
51bae274
DM		 1039sub parse_group_fw_rules {
1040 my ($filename, $fh) = @_;
5e1267a5 1041
51bae274
DM		 1042 my $section;
1043 my $group;
1044
1045 my $res = { in => [], out => [] };
6158271d 1046
51bae274
DM		 1047 while (defined(my $line = <$fh>)) {
1048 next if $line =~ m/^#/;
1049 next if $line =~ m/^\s*$/;
1050
961b4928
DM		 1051 my $linenr = $fh->input_line_number();
1052 my $prefix = "$filename (line $linenr)";
1053
51bae274
DM		 1054 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1055 $section = lc($1);
1056 $group = lc($2);
1057 next;
1058 }
1059 if (!$section || !$group) {
961b4928 1060 warn "$prefix: skip line - no section";
51bae274
DM		 1061 next;
1062 }
1063
961b4928
DM		 1064 my $rules;
1065 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1066 if (my $err = $@) {
961b4928 1067 warn "$prefix: $err";
51bae274
DM		 1068 next;
1069 }
1070
961b4928 1071 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1072 }
1073
1074 return $res;
1075}
1076
06320eb0
DM		 1077sub run_locked {
1078 my ($code, @param) = @_;
1079
1080 my $timeout = 10;
1081
1082 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1083
1084 die $@ if $@;
1085
1086 return $res;
1087}
1088
5e1267a5
DM		 1089sub read_local_vm_config {
1090
1091 my $openvz = {};
1092
1093 my $qemu = {};
1094
1095 my $list = PVE::QemuServer::config_list();
1096
1097 foreach my $vmid (keys %$list) {
5e1267a5
DM		 1098 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1099 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1100 $qemu->{$vmid} = $conf;
1101 }
1102 }
1103
1104 my $vmdata = { openvz => $openvz, qemu => $qemu };
1105
1106 return $vmdata;
1107};
1108
1109sub read_vm_firewall_rules {
1110 my ($vmdata) = @_;
1111 my $rules = {};
1112 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1113 my $filename = "/etc/pve/firewall/$vmid.fw";
1114 my $fh = IO::File->new($filename, O_RDONLY);
1115 next if !$fh;
1116
51bae274 1117 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1118 }
1119
1120 return $rules;
1121}
1122
1123sub compile {
5e1267a5
DM		 1124 my $vmdata = read_local_vm_config();
1125 my $rules = read_vm_firewall_rules($vmdata);
6158271d 1126
51bae274
DM		 1127 my $group_rules = {};
1128 my $filename = "/etc/pve/firewall/groups.fw";
1129 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1130 $group_rules = parse_group_fw_rules($filename, $fh);
1131 }
5e1267a5 1132
3fa83edf
DM		 1133 #print Dumper($rules);
1134
1135 my $ruleset = {};
1136
dec84fcd
DM		 1137 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1138 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
fadb13dd 1139 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1140
4e6112f9
DM		 1141 ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK");
1142 ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
1143
fadb13dd 1144 my $enable_hostfw = 0;
51bae274
DM		 1145 $filename = "/etc/pve/local/host.fw";
1146 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1147 my $host_rules = parse_host_fw_rules($filename, $fh);
fadb13dd
DM		 1148
1149 $enable_hostfw = 1;
1150
51bae274
DM		 1151 enablehostfw($ruleset, $host_rules, $group_rules);
1152 }
3fa83edf 1153
6158271d 1154 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1155 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1156 my $conf = $vmdata->{qemu}->{$vmid};
fa9c4a6f
DM		 1157 my $vmfw_conf = $rules->{$vmid};
1158 next if !$vmfw_conf;
1159 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1160
1161 foreach my $netid (keys %$conf) {
1162 next if $netid !~ m/^net(\d+)$/;
1163 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1164 next if !$net;
1165 my $iface = "tap${vmid}i$1";
5e1267a5 1166
3fa83edf
DM		 1167 my $bridge = $net->{bridge};
1168 next if !$bridge; # fixme: ?
1169
1170 $bridge .= "v$net->{tag}" if $net->{tag};
1171
fadb13dd 1172
3fa83edf
DM		 1173 generate_bridge_chains($ruleset, $bridge);
1174
c29f55c9 1175 my $macaddr = $net->{macaddr};
fa9c4a6f
DM		 1176 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1177 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1178 }
1179 }
c0413e35 1180
fadb13dd
DM		 1181 if ($enable_hostfw) {
1182 # allow traffic from lo (ourself)
1183 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1184 }
c0413e35 1185
3fa83edf
DM		 1186 return $ruleset;
1187}
1188
1189sub get_ruleset_status {
1190 my ($ruleset, $verbose) = @_;
1191
1192 my $active_chains = iptables_get_chains();
1193
1194 my $statushash = {};
1195
1196 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1197 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1198 foreach my $cmd (@{$ruleset->{$chain}}) {
1199 $digest->add("$cmd\n");
1200 }
1201 my $sig = $digest->b64digest;
1202 $statushash->{$chain}->{sig} = $sig;
1203
1204 my $oldsig = $active_chains->{$chain};
1205 if (!defined($oldsig)) {
1206 $statushash->{$chain}->{action} = 'create';
1207 } else {
1208 if ($oldsig eq $sig) {
1209 $statushash->{$chain}->{action} = 'exists';
1210 } else {
1211 $statushash->{$chain}->{action} = 'update';
1212 }
1213 }
1214 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1215 foreach my $cmd (@{$ruleset->{$chain}}) {
1216 print "\t$cmd\n" if $verbose;
1217 }
1218 }
1219
1220 foreach my $chain (sort keys %$active_chains) {
1221 if (!defined($ruleset->{$chain})) {
1222 my $sig = $active_chains->{$chain};
1223 $statushash->{$chain}->{action} = 'delete';
1224 $statushash->{$chain}->{sig} = $sig;
1225 print "delete $chain ($sig)\n" if $verbose;
1226 }
6158271d 1227 }
3fa83edf
DM		 1228
1229 return $statushash;
1230}
1231
1232sub print_ruleset {
1233 my ($ruleset) = @_;
1234
1235 get_ruleset_status($ruleset, 1);
1236}
1237
1238sub print_sig_rule {
1239 my ($chain, $sig) = @_;
1240
09d5f68e
DM		 1241 # We just use this to store a SHA1 checksum used to detect changes
1242 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1243}
1244
a84f4d96
DM		 1245sub apply_ruleset {
1246 my ($ruleset, $verbose) = @_;
3fa83edf 1247
a84f4d96 1248 enable_bridge_firewall();
3fa83edf
DM		 1249
1250 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1251
1252 my $statushash = get_ruleset_status($ruleset, $verbose);
1253
1254 # create missing chains first
1255 foreach my $chain (sort keys %$ruleset) {
1256 my $stat = $statushash->{$chain};
1257 die "internal error" if !$stat;
1258 next if $stat->{action} ne 'create';
886aba9c 1259
3fa83edf
DM		 1260 $cmdlist .= ":$chain - [0:0]\n";
1261 }
1262
dec84fcd 1263 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1264 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1265 $cmdlist .= "-A $rule\n";
1266 }
dec84fcd 1267 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1268 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1269 $cmdlist .= "-A $rule\n";
1270 }
1271
dec84fcd 1272 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1273 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1274 $cmdlist .= "-A $rule\n";
1275 }
1276
1277 foreach my $chain (sort keys %$ruleset) {
1278 my $stat = $statushash->{$chain};
1279 die "internal error" if !$stat;
1280
1281 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1282 $cmdlist .= "-F $chain\n";
1283 foreach my $cmd (@{$ruleset->{$chain}}) {
1284 $cmdlist .= "$cmd\n";
1285 }
1286 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1287 } elsif ($stat->{action} eq 'delete') {
f5d28682 1288 die "internal error"; # this should not happen
3fa83edf
DM		 1289 } elsif ($stat->{action} eq 'exists') {
1290 # do nothing
1291 } else {
1292 die "internal error - unknown status '$stat->{action}'";
1293 }
1294 }
1295
f5d28682
DM		 1296 foreach my $chain (keys %$statushash) {
1297 next if $statushash->{$chain}->{action} ne 'delete';
1298 $cmdlist .= "-F $chain\n";
1299 }
1300 foreach my $chain (keys %$statushash) {
1301 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1302 next if $chain eq 'PVEFW-INPUT';
1303 next if $chain eq 'PVEFW-OUTPUT';
1304 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1305 $cmdlist .= "-X $chain\n";
1306 }
1307
3fa83edf
DM		 1308 $cmdlist .= "COMMIT\n";
1309
1310 print $cmdlist if $verbose;
1311
1312 iptables_restore_cmdlist($cmdlist);
1313
6158271d 1314 # test: re-read status and check if everything is up to date
3fa83edf
DM		 1315 $statushash = get_ruleset_status($ruleset);
1316
1317 my $errors;
1318 foreach my $chain (sort keys %$ruleset) {
1319 my $stat = $statushash->{$chain};
1320 if ($stat->{action} ne 'exists') {
1321 warn "unable to update chain '$chain'\n";
1322 $errors = 1;
1323 }
1324 }
b6360c3f 1325
3fa83edf 1326 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1327}
1328
b6360c3f 13291;
Firewall test scripts