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allow traffic from lo (PVEFW-INPUT)
[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
961b4928 18# todo: define more MACROS
857f62c8 19# imported/converted from: /usr/share/shorewall/macro.*
961b4928 20my $pve_fw_macros = {
857f62c8
DM		 21 'Amanda' => [
22 { action => 'PARAM', proto => 'udp', dport => '10080' },
23 { action => 'PARAM', proto => 'tcp', dport => '10080' },
24 ],
25 'Auth' => [
26 { action => 'PARAM', proto => 'tcp', dport => '113' },
27 ],
28 'BGP' => [
29 { action => 'PARAM', proto => 'tcp', dport => '179' },
30 ],
31 'BitTorrent' => [
961b4928 32 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 33 { action => 'PARAM', proto => 'udp', dport => '6881' },
34 ],
35 'BitTorrent32' => [
36 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
37 { action => 'PARAM', proto => 'udp', dport => '6881' },
38 ],
39 'CVS' => [
40 { action => 'PARAM', proto => 'tcp', dport => '2401' },
41 ],
42 'Citrix' => [
43 { action => 'PARAM', proto => 'tcp', dport => '1494' },
44 { action => 'PARAM', proto => 'udp', dport => '1604' },
45 { action => 'PARAM', proto => 'tcp', dport => '2598' },
46 ],
47 'DAAP' => [
48 { action => 'PARAM', proto => 'tcp', dport => '3689' },
49 { action => 'PARAM', proto => 'udp', dport => '3689' },
50 ],
51 'DCC' => [
52 { action => 'PARAM', proto => 'tcp', dport => '6277' },
53 ],
54 'DHCPfwd' => [
55 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
56 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
57 ],
58 'DNS' => [
59 { action => 'PARAM', proto => 'udp', dport => '53' },
60 { action => 'PARAM', proto => 'tcp', dport => '53' },
61 ],
62 'Distcc' => [
63 { action => 'PARAM', proto => 'tcp', dport => '3632' },
64 ],
65 'Edonkey' => [
66 { action => 'PARAM', proto => 'tcp', dport => '4662' },
67 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 68 ],
857f62c8
DM		 69 'FTP' => [
70 { action => 'PARAM', proto => 'tcp', dport => '21' },
71 ],
72 'Finger' => [
73 { action => 'PARAM', proto => 'tcp', dport => '79' },
74 ],
75 'GNUnet' => [
76 { action => 'PARAM', proto => 'tcp', dport => '2086' },
77 { action => 'PARAM', proto => 'udp', dport => '2086' },
78 { action => 'PARAM', proto => 'tcp', dport => '1080' },
79 { action => 'PARAM', proto => 'udp', dport => '1080' },
80 ],
81 'GRE' => [
82 { action => 'PARAM', proto => '47' },
83 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
84 ],
85 'Git' => [
86 { action => 'PARAM', proto => 'tcp', dport => '9418' },
87 ],
88 'Gnutella' => [
89 { action => 'PARAM', proto => 'tcp', dport => '6346' },
90 { action => 'PARAM', proto => 'udp', dport => '6346' },
91 ],
92 'HKP' => [
93 { action => 'PARAM', proto => 'tcp', dport => '11371' },
94 ],
95 'HTTP' => [
961b4928
DM		 96 { action => 'PARAM', proto => 'tcp', dport => '80' },
97 ],
857f62c8
DM		 98 'HTTPS' => [
99 { action => 'PARAM', proto => 'tcp', dport => '443' },
100 ],
101 'ICPV2' => [
102 { action => 'PARAM', proto => 'udp', dport => '3130' },
103 ],
104 'ICQ' => [
105 { action => 'PARAM', proto => 'tcp', dport => '5190' },
106 ],
107 'IMAP' => [
108 { action => 'PARAM', proto => 'tcp', dport => '143' },
109 ],
110 'IMAPS' => [
111 { action => 'PARAM', proto => 'tcp', dport => '993' },
112 ],
113 'IPIP' => [
114 { action => 'PARAM', proto => '94' },
115 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
116 ],
117 'IPP' => [
118 { action => 'PARAM', proto => 'tcp', dport => '631' },
119 ],
120 'IPPbrd' => [
121 { action => 'PARAM', proto => 'udp', dport => '631' },
122 ],
123 'IPPserver' => [
124 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
125 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
126 ],
127 'IPsec' => [
128 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
129 { action => 'PARAM', proto => '50' },
130 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
131 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
132 ],
133 'IPsecah' => [
134 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
135 { action => 'PARAM', proto => '51' },
136 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
137 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
138 ],
139 'IPsecnat' => [
140 { action => 'PARAM', proto => 'udp', dport => '500' },
141 { action => 'PARAM', proto => 'udp', dport => '4500' },
142 { action => 'PARAM', proto => '50' },
143 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
144 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
145 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
146 ],
147 'IRC' => [
148 { action => 'PARAM', proto => 'tcp', dport => '6667' },
149 ],
150 'JabberPlain' => [
151 { action => 'PARAM', proto => 'tcp', dport => '5222' },
152 ],
153 'JabberSecure' => [
154 { action => 'PARAM', proto => 'tcp', dport => '5223' },
155 ],
156 'Jabberd' => [
157 { action => 'PARAM', proto => 'tcp', dport => '5269' },
158 ],
159 'Jetdirect' => [
160 { action => 'PARAM', proto => 'tcp', dport => '9100' },
161 ],
162 'L2TP' => [
163 { action => 'PARAM', proto => 'udp', dport => '1701' },
164 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
165 ],
166 'LDAP' => [
167 { action => 'PARAM', proto => 'tcp', dport => '389' },
168 ],
169 'LDAPS' => [
170 { action => 'PARAM', proto => 'tcp', dport => '636' },
171 ],
172 'MSNP' => [
173 { action => 'PARAM', proto => 'tcp', dport => '1863' },
174 ],
175 'MSSQL' => [
176 { action => 'PARAM', proto => 'tcp', dport => '1433' },
177 ],
178 'Mail' => [
179 { action => 'PARAM', proto => 'tcp', dport => '25' },
180 { action => 'PARAM', proto => 'tcp', dport => '465' },
181 { action => 'PARAM', proto => 'tcp', dport => '587' },
182 ],
183 'Munin' => [
184 { action => 'PARAM', proto => 'tcp', dport => '4949' },
185 ],
186 'MySQL' => [
187 { action => 'PARAM', proto => 'tcp', dport => '3306' },
188 ],
189 'NNTP' => [
190 { action => 'PARAM', proto => 'tcp', dport => '119' },
191 ],
192 'NNTPS' => [
193 { action => 'PARAM', proto => 'tcp', dport => '563' },
194 ],
195 'NTP' => [
196 { action => 'PARAM', proto => 'udp', dport => '123' },
197 ],
198 'NTPbi' => [
199 { action => 'PARAM', proto => 'udp', dport => '123' },
200 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
201 ],
202 'NTPbrd' => [
203 { action => 'PARAM', proto => 'udp', dport => '123' },
204 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
205 ],
206 'OSPF' => [
207 { action => 'PARAM', proto => '89' },
208 ],
209 'OpenVPN' => [
210 { action => 'PARAM', proto => 'udp', dport => '1194' },
211 ],
212 'PCA' => [
213 { action => 'PARAM', proto => 'udp', dport => '5632' },
214 { action => 'PARAM', proto => 'tcp', dport => '5631' },
215 ],
216 'POP3' => [
217 { action => 'PARAM', proto => 'tcp', dport => '110' },
218 ],
219 'POP3S' => [
220 { action => 'PARAM', proto => 'tcp', dport => '995' },
221 ],
222 'PPtP' => [
223 { action => 'PARAM', proto => '47' },
224 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
225 { action => 'PARAM', proto => 'tcp', dport => '1723' },
226 ],
227 'Ping' => [
228 { action => 'PARAM', proto => 'icmp', dport => '8' },
229 ],
230 'PostgreSQL' => [
231 { action => 'PARAM', proto => 'tcp', dport => '5432' },
232 ],
233 'Printer' => [
234 { action => 'PARAM', proto => 'tcp', dport => '515' },
235 ],
236 'RDP' => [
237 { action => 'PARAM', proto => 'tcp', dport => '3389' },
238 ],
239 'RIPbi' => [
240 { action => 'PARAM', proto => 'udp', dport => '520' },
241 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
242 ],
243 'RNDC' => [
244 { action => 'PARAM', proto => 'tcp', dport => '953' },
245 ],
246 'Razor' => [
247 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
248 ],
249 'Rdate' => [
250 { action => 'PARAM', proto => 'tcp', dport => '37' },
251 ],
252 'Rsync' => [
253 { action => 'PARAM', proto => 'tcp', dport => '873' },
254 ],
255 'SANE' => [
256 { action => 'PARAM', proto => 'tcp', dport => '6566' },
257 ],
258 'SMB' => [
259 { action => 'PARAM', proto => 'udp', dport => '135,445' },
260 { action => 'PARAM', proto => 'udp', dport => '137:139' },
261 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
262 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
263 ],
264 'SMBBI' => [
265 { action => 'PARAM', proto => 'udp', dport => '135,445' },
266 { action => 'PARAM', proto => 'udp', dport => '137:139' },
267 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
268 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
269 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
270 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
271 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
272 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
273 ],
274 'SMBswat' => [
275 { action => 'PARAM', proto => 'tcp', dport => '901' },
276 ],
277 'SMTP' => [
278 { action => 'PARAM', proto => 'tcp', dport => '25' },
279 ],
280 'SMTPS' => [
281 { action => 'PARAM', proto => 'tcp', dport => '465' },
282 ],
283 'SNMP' => [
284 { action => 'PARAM', proto => 'udp', dport => '161:162' },
285 { action => 'PARAM', proto => 'tcp', dport => '161' },
286 ],
287 'SPAMD' => [
288 { action => 'PARAM', proto => 'tcp', dport => '783' },
289 ],
290 'SSH' => [
291 { action => 'PARAM', proto => 'tcp', dport => '22' },
292 ],
293 'SVN' => [
294 { action => 'PARAM', proto => 'tcp', dport => '3690' },
295 ],
296 'SixXS' => [
297 { action => 'PARAM', proto => 'tcp', dport => '3874' },
298 { action => 'PARAM', proto => 'udp', dport => '3740' },
299 { action => 'PARAM', proto => '41' },
300 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
301 ],
302 'Squid' => [
303 { action => 'PARAM', proto => 'tcp', dport => '3128' },
304 ],
305 'Submission' => [
306 { action => 'PARAM', proto => 'tcp', dport => '587' },
307 ],
308 'Syslog' => [
309 { action => 'PARAM', proto => 'udp', dport => '514' },
310 { action => 'PARAM', proto => 'tcp', dport => '514' },
311 ],
312 'TFTP' => [
313 { action => 'PARAM', proto => 'udp', dport => '69' },
314 ],
315 'Telnet' => [
316 { action => 'PARAM', proto => 'tcp', dport => '23' },
317 ],
318 'Telnets' => [
319 { action => 'PARAM', proto => 'tcp', dport => '992' },
320 ],
321 'Time' => [
322 { action => 'PARAM', proto => 'tcp', dport => '37' },
323 ],
324 'Trcrt' => [
325 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
326 { action => 'PARAM', proto => 'icmp', dport => '8' },
327 ],
328 'VNC' => [
329 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
330 ],
331 'VNCL' => [
332 { action => 'PARAM', proto => 'tcp', dport => '5500' },
333 ],
334 'Web' => [
335 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 336 { action => 'PARAM', proto => 'tcp', dport => '443' },
337 ],
857f62c8
DM		 338 'Webcache' => [
339 { action => 'PARAM', proto => 'tcp', dport => '8080' },
340 ],
341 'Webmin' => [
342 { action => 'PARAM', proto => 'tcp', dport => '10000' },
343 ],
344 'Whois' => [
345 { action => 'PARAM', proto => 'tcp', dport => '43' },
346 ],
961b4928
DM		 347};
348
349my $pve_fw_parsed_macros;
350my $pve_fw_preferred_macro_names = {};
3a616aa0 351
a332200b 352sub get_firewall_macros {
9aab3127 353
961b4928
DM		 354 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
355
356 $pve_fw_parsed_macros = {};
9aab3127 357
961b4928
DM		 358 foreach my $k (keys %$pve_fw_macros) {
359 my $name = lc($k);
a332200b 360
961b4928
DM		 361 my $macro = $pve_fw_macros->{$k};
362 $pve_fw_preferred_macro_names->{$name} = $k;
363 $pve_fw_parsed_macros->{$name} = $macro;
364 }
a332200b 365
961b4928 366 return $pve_fw_parsed_macros;
9aab3127
DM		 367}
368
fcba0beb
DM		 369my $etc_services;
370
371sub get_etc_services {
372
373 return $etc_services if $etc_services;
374
375 my $filename = "/etc/services";
376
377 my $fh = IO::File->new($filename, O_RDONLY);
378 if (!$fh) {
379 warn "unable to read '$filename' - $!\n";
380 return {};
381 }
382
383 my $services = {};
384
385 while (my $line = <$fh>) {
386 chomp ($line);
387 next if $line =~m/^#/;
388 next if ($line =~m/^\s*$/);
389
390 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
391 $services->{byid}->{$2}->{name} = $1;
392 $services->{byid}->{$2}->{$3} = 1;
393 $services->{byname}->{$1} = $services->{byid}->{$2};
394 }
395 }
396
397 close($fh);
398
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 = "";
fcba0beb 460 foreach my $pon (split(':', $item, 2)) {
4cdbb3b7 461 if ($pon =~ m/^\d+$/){
857f62c8 462 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
4cdbb3b7
AD		 463 }else{
464 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
465 }
466 $nbports++;
fcba0beb
DM		 467 }
468 }
469
4cdbb3b7 470 return ($nbports);
fcba0beb
DM		 471}
472
780bcc0f
DM		 473my $bridge_firewall_enabled = 0;
474
475sub enable_bridge_firewall {
476
477 return if $bridge_firewall_enabled; # only once
478
479 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
480 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
481
482 $bridge_firewall_enabled = 1;
483}
484
8cebfa6f 485my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 486
3a616aa0
AD		 487sub iptables {
488 my ($cmd) = @_;
489
490 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
491}
492
b16e818e
DM		 493sub iptables_restore_cmdlist {
494 my ($cmdlist) = @_;
3a616aa0 495
3fa83edf 496 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 497}
498
de2a57cd
DM		 499sub iptables_get_chains {
500
501 my $res = {};
502
503 # check what chains we want to track
504 my $is_pvefw_chain = sub {
505 my $name = shift;
506
dec84fcd
DM		 507 return 1 if $name =~ m/^PVEFW-\S+$/;
508
de2a57cd 509 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
b16e818e 510 return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/;
f50656c2 511 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 512
513 return undef;
514 };
515
516 my $table = '';
517
de2a57cd
DM		 518 my $parser = sub {
519 my $line = shift;
520
521 return if $line =~ m/^#/;
522 return if $line =~ m/^\s*$/;
523
524 if ($line =~ m/^\*(\S+)$/) {
525 $table = $1;
526 return;
527 }
528
529 return if $table ne 'filter';
530
531 if ($line =~ m/^:(\S+)\s/) {
532 my $chain = $1;
533 return if !&$is_pvefw_chain($chain);
3fa83edf 534 $res->{$chain} = "unknown";
09d5f68e 535 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 536 my ($chain, $sig) = ($1, $2);
de2a57cd 537 return if !&$is_pvefw_chain($chain);
3fa83edf 538 $res->{$chain} = $sig;
de2a57cd
DM		 539 } else {
540 # simply ignore the rest
541 return;
542 }
543 };
544
545 run_command("/sbin/iptables-save", outfunc => $parser);
546
de2a57cd
DM		 547 return $res;
548}
549
3a616aa0
AD		 550sub iptables_chain_exist {
551 my ($chain) = @_;
552
553 eval{
554 iptables("-n --list $chain");
555 };
556 return undef if $@;
557
558 return 1;
559}
560
561sub iptables_rule_exist {
562 my ($rule) = @_;
563
564 eval{
565 iptables("-C $rule");
566 };
567 return undef if $@;
568
569 return 1;
570}
571
3fa83edf 572sub ruleset_generate_rule {
4e6112f9 573 my ($ruleset, $chain, $rule, $goto) = @_;
3a616aa0 574
3fa83edf 575 my $cmd = '';
3a616aa0 576
d6de1dc2 577 $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
3a616aa0 578 $cmd .= " -s $rule->{source}" if $rule->{source};
d6de1dc2 579 $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
8c32a215 580 $cmd .= " -d $rule->{dest}" if $rule->{dest};
3a616aa0 581 $cmd .= " -p $rule->{proto}" if $rule->{proto};
4cdbb3b7 582 $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1;
3a616aa0 583 $cmd .= " --dport $rule->{dport}" if $rule->{dport};
4cdbb3b7 584 $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1;
3a616aa0 585 $cmd .= " --sport $rule->{sport}" if $rule->{sport};
4e6112f9
DM		 586
587 if (my $action = $rule->{action}) {
588 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
589 $cmd .= $goto ? " -g $action" : " -j $action";
590 };
3a616aa0 591
3fa83edf
DM		 592 ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
593}
594
595sub ruleset_create_chain {
596 my ($ruleset, $chain) = @_;
3a616aa0 597
d050c724
DM		 598 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
599
3fa83edf
DM		 600 die "chain '$chain' already exists\n" if $ruleset->{$chain};
601
602 $ruleset->{$chain} = [];
3a616aa0
AD		 603}
604
3fa83edf
DM		 605sub ruleset_chain_exist {
606 my ($ruleset, $chain) = @_;
3a616aa0 607
3fa83edf
DM		 608 return $ruleset->{$chain} ? 1 : undef;
609}
3a616aa0 610
3fa83edf
DM		 611sub ruleset_addrule {
612 my ($ruleset, $chain, $rule) = @_;
3a616aa0 613
3fa83edf 614 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 615
3fa83edf
DM		 616 push @{$ruleset->{$chain}}, "-A $chain $rule";
617}
3a616aa0 618
3fa83edf
DM		 619sub ruleset_insertrule {
620 my ($ruleset, $chain, $rule) = @_;
3a616aa0 621
3fa83edf 622 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 623
3fa83edf
DM		 624 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
625}
3a616aa0 626
3fa83edf
DM		 627sub generate_bridge_chains {
628 my ($ruleset, $bridge) = @_;
3a616aa0 629
dec84fcd
DM		 630 if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){
631 ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN");
d4d0fd1d
AD		 632 }
633
dec84fcd
DM		 634 if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){
635 ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT");
d4d0fd1d 636 }
3fa83edf 637
dec84fcd
DM		 638 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
639 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 640
dec84fcd
DM		 641 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT");
642 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
643 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
3a616aa0
AD		 644 }
645
3fa83edf
DM		 646 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
647 ruleset_create_chain($ruleset, "$bridge-IN");
dec84fcd
DM		 648 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
649 ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN");
3fa83edf
DM		 650 ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT");
651 }
3a616aa0 652
3fa83edf
DM		 653 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
654 ruleset_create_chain($ruleset, "$bridge-OUT");
dec84fcd
DM		 655 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
656 ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT");
3fa83edf
DM		 657 }
658}
3a616aa0
AD		 659
660sub generate_tap_rules_direction {
51bae274 661 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_;
3a616aa0
AD		 662
663 my $tapchain = "$iface-$direction";
664
3fa83edf 665 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 666
3fa83edf
DM		 667 ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP");
668 ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 669
c29f55c9
DM		 670 if ($direction eq 'OUT' && defined($macaddr)) {
671 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
672 }
673
3fa83edf 674 if ($rules) {
3a616aa0
AD		 675 foreach my $rule (@$rules) {
676 next if $rule->{iface} && $rule->{iface} ne $netid;
bfbfa8b6 677 # we go to $bridge-IN if accept in out rules
3a616aa0 678 if($rule->{action} =~ m/^(GROUP-(\S+))$/){
3fa83edf
DM		 679 $rule->{action} .= "-$direction";
680 # generate empty group rule if don't exist
681 if(!ruleset_chain_exist($ruleset, $rule->{action})){
51bae274 682 generate_group_rules($ruleset, $group_rules, $2);
3fa83edf 683 }
4e6112f9 684 ruleset_generate_rule($ruleset, $tapchain, $rule);
31ff3ef6
DM		 685 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN")
686 if $direction eq 'OUT';
4e6112f9 687 } else {
4e6112f9
DM		 688 $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
689 ruleset_generate_rule($ruleset, $tapchain, $rule);
3a616aa0 690 }
4e6112f9 691 }
3a616aa0
AD		 692 }
693
3fa83edf
DM		 694 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
695 ruleset_addrule($ruleset, $tapchain, "-j DROP");
3a616aa0 696
3fa83edf
DM		 697 # plug the tap chain to bridge chain
698 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
699 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
700 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0 701
3fa83edf
DM		 702 if ($direction eq 'OUT'){
703 # add tap->host rules
704 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
dec84fcd 705 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
3a616aa0
AD		 706 }
707}
708
0bd5f137 709sub enablehostfw {
51bae274 710 my ($ruleset, $rules, $group_rules) = @_;
0bd5f137 711
51bae274 712 # fixme: allow security groups
0bd5f137 713
3fa83edf 714 # host inbound firewall
dec84fcd
DM		 715 my $chain = "PVEFW-HOST-IN";
716 ruleset_create_chain($ruleset, $chain);
0bd5f137 717
dec84fcd
DM		 718 ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP");
719 ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
720 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
721 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
722 ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
723 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 724
3fa83edf
DM		 725 if ($rules->{in}) {
726 foreach my $rule (@{$rules->{in}}) {
727 # we use RETURN because we need to check also tap rules
728 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 729 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 730 }
0bd5f137
AD		 731 }
732
dec84fcd
DM		 733 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
734 ruleset_addrule($ruleset, $chain, "-j DROP");
0bd5f137 735
3fa83edf 736 # host outbound firewall
aadd745e 737 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 738 ruleset_create_chain($ruleset, $chain);
739
740 ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP");
741 ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
742 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
743 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
744 ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
745 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 746
3fa83edf
DM		 747 if ($rules->{out}) {
748 foreach my $rule (@{$rules->{out}}) {
749 # we use RETURN because we need to check also tap rules
750 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 751 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 752 }
0bd5f137
AD		 753 }
754
dec84fcd
DM		 755 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
756 ruleset_addrule($ruleset, $chain, "-j DROP");
9d31b418 757
dec84fcd
DM		 758 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
759 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 760}
761
762sub generate_group_rules {
51bae274 763 my ($ruleset, $group_rules, $group) = @_;
9d31b418 764
51bae274 765 my $rules = $group_rules->{$group};
9d31b418 766
51bae274
DM		 767 die "no such security group '$group'\n" if !$rules;
768
3fa83edf 769 my $chain = "GROUP-${group}-IN";
9d31b418 770
3fa83edf 771 ruleset_create_chain($ruleset, $chain);
9d31b418 772
3fa83edf
DM		 773 if ($rules->{in}) {
774 foreach my $rule (@{$rules->{in}}) {
775 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 776 }
777 }
778
3fa83edf 779 $chain = "GROUP-${group}-OUT";
9d31b418 780
3fa83edf 781 ruleset_create_chain($ruleset, $chain);
4e6112f9 782 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 783
3fa83edf
DM		 784 if ($rules->{out}) {
785 foreach my $rule (@{$rules->{out}}) {
4e6112f9
DM		 786 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
787 # check also other tap rules (and group rules can be set on any bridge,
788 # so we can't go to VMBRXX-IN)
789 $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
6a6c7af7 790 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 791 }
792 }
9d31b418
AD		 793}
794
51bae274
DM		 795my $MAX_NETS = 32;
796my $valid_netdev_names = {};
797for (my $i = 0; $i < $MAX_NETS; $i++) {
798 $valid_netdev_names->{"net$i"} = 1;
799}
5e1267a5 800
51bae274
DM		 801sub parse_fw_rule {
802 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 803
a332200b 804 my $macros = get_firewall_macros();
fcba0beb 805 my $protocols = get_etc_protocols();
51bae274
DM		 806
807 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
808
809 $line =~ s/#.*$//;
810
811 my @data = split(/\s+/, $line);
812 my $expected_elements = $need_iface ? 7 : 6;
813
814 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
815
816 if ($need_iface) {
817 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
818 } else {
819 ($action, $source, $dest, $proto, $dport, $sport) = @data;
820 }
821
822 die "incomplete rule\n" if !$action;
823
961b4928
DM		 824 my $macro;
825 my $macro_name;
826
51bae274
DM		 827 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
828 # OK
829 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
830 # OK
831 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
961b4928
DM		 832 ($macro_name, $action) = ($1, $2);
833 my $lc_macro_name = lc($macro_name);
834 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
835 $macro_name = $preferred_name if $preferred_name;
836 $macro = $macros->{$lc_macro_name};
837 die "unknown macro '$macro_name'\n" if !$macro;
51bae274
DM		 838 } else {
839 die "unknown action '$action'\n";
840 }
841
842 if ($need_iface) {
843 $iface = undef if $iface && $iface eq '-';
844 die "unknown interface '$iface'\n"
845 if defined($iface) && !$valid_netdev_names->{$iface};
846 }
847
848 $proto = undef if $proto && $proto eq '-';
849 die "unknown protokol '$proto'\n" if $proto &&
850 !(defined($protocols->{byname}->{$proto}) ||
851 defined($protocols->{byid}->{$proto}));
852
853 $source = undef if $source && $source eq '-';
854 $dest = undef if $dest && $dest eq '-';
855
856 $dport = undef if $dport && $dport eq '-';
857 $sport = undef if $sport && $sport eq '-';
858
51bae274
DM		 859 my $nbsource = undef;
860 my $nbdest = undef;
861
862 $nbsource = parse_address_list($source) if $source;
863 $nbdest = parse_address_list($dest) if $dest;
961b4928
DM		 864
865 my $rules = [];
51bae274 866
961b4928 867 my $param = {
51bae274 868 action => $action,
51bae274
DM		 869 iface => $iface,
870 source => $source,
871 dest => $dest,
872 nbsource => $nbsource,
873 nbdest => $nbdest,
874 proto => $proto,
875 dport => $dport,
876 sport => $sport,
51bae274 877 };
961b4928
DM		 878
879 if ($macro) {
880 foreach my $templ (@$macro) {
881 my $rule = {};
882 foreach my $k (keys %$templ) {
883 my $v = $templ->{$k};
857f62c8
DM		 884 if ($v eq 'PARAM') {
885 $v = $param->{$k};
886 } elsif ($v eq 'DEST') {
887 $v = $param->{dest};
888 } elsif ($v eq 'SOURCE') {
889 $v = $param->{source};
890 }
891
961b4928
DM		 892 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
893 $rule->{$k} = $v;
894 }
895 push @$rules, $rule;
896 }
897 } else {
898 push @$rules, $param;
899 }
900
901 foreach my $rule (@$rules) {
902 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
903 if defined($rule->{dport});
904 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
905 if defined($rule->{sport});
906 }
907
908 return $rules;
51bae274
DM		 909}
910
911sub parse_vm_fw_rules {
912 my ($filename, $fh) = @_;
913
914 my $res = { in => [], out => [] };
915
916 my $section;
917
5e1267a5
DM		 918 while (defined(my $line = <$fh>)) {
919 next if $line =~ m/^#/;
920 next if $line =~ m/^\s*$/;
921
961b4928
DM		 922 my $linenr = $fh->input_line_number();
923 my $prefix = "$filename (line $linenr)";
924
51bae274 925 if ($line =~ m/^\[(in|out)\]\s*$/i) {
5e1267a5
DM		 926 $section = lc($1);
927 next;
928 }
51bae274 929 if (!$section) {
961b4928 930 warn "$prefix: skip line - no section";
5e1267a5
DM		 931 next;
932 }
933
961b4928
DM		 934 my $rules;
935 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 936 if (my $err = $@) {
961b4928 937 warn "$prefix: $err";
5e1267a5
DM		 938 next;
939 }
940
961b4928 941 push @{$res->{$section}}, @$rules;
51bae274
DM		 942 }
943
944 return $res;
945}
946
947sub parse_host_fw_rules {
948 my ($filename, $fh) = @_;
949
950 my $res = { in => [], out => [] };
951
952 my $section;
953
954 while (defined(my $line = <$fh>)) {
955 next if $line =~ m/^#/;
956 next if $line =~ m/^\s*$/;
957
961b4928
DM		 958 my $linenr = $fh->input_line_number();
959 my $prefix = "$filename (line $linenr)";
960
51bae274
DM		 961 if ($line =~ m/^\[(in|out)\]\s*$/i) {
962 $section = lc($1);
5e1267a5
DM		 963 next;
964 }
51bae274 965 if (!$section) {
961b4928 966 warn "$prefix: skip line - no section";
5e1267a5
DM		 967 next;
968 }
969
961b4928
DM		 970 my $rules;
971 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 972 if (my $err = $@) {
961b4928 973 warn "$prefix: $err";
ecbea048 974 next;
ecbea048
DM		 975 }
976
961b4928 977 push @{$res->{$section}}, @$rules;
51bae274 978 }
ecbea048 979
51bae274
DM		 980 return $res;
981}
4cdbb3b7 982
51bae274
DM		 983sub parse_group_fw_rules {
984 my ($filename, $fh) = @_;
5e1267a5 985
51bae274
DM		 986 my $section;
987 my $group;
988
989 my $res = { in => [], out => [] };
990
991 while (defined(my $line = <$fh>)) {
992 next if $line =~ m/^#/;
993 next if $line =~ m/^\s*$/;
994
961b4928
DM		 995 my $linenr = $fh->input_line_number();
996 my $prefix = "$filename (line $linenr)";
997
51bae274
DM		 998 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
999 $section = lc($1);
1000 $group = lc($2);
1001 next;
1002 }
1003 if (!$section || !$group) {
961b4928 1004 warn "$prefix: skip line - no section";
51bae274
DM		 1005 next;
1006 }
1007
961b4928
DM		 1008 my $rules;
1009 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1010 if (my $err = $@) {
961b4928 1011 warn "$prefix: $err";
51bae274
DM		 1012 next;
1013 }
1014
961b4928 1015 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1016 }
1017
1018 return $res;
1019}
1020
06320eb0
DM		 1021sub run_locked {
1022 my ($code, @param) = @_;
1023
1024 my $timeout = 10;
1025
1026 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1027
1028 die $@ if $@;
1029
1030 return $res;
1031}
1032
5e1267a5
DM		 1033sub read_local_vm_config {
1034
1035 my $openvz = {};
1036
1037 my $qemu = {};
1038
1039 my $list = PVE::QemuServer::config_list();
1040
1041 foreach my $vmid (keys %$list) {
5e1267a5
DM		 1042 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1043 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1044 $qemu->{$vmid} = $conf;
1045 }
1046 }
1047
1048 my $vmdata = { openvz => $openvz, qemu => $qemu };
1049
1050 return $vmdata;
1051};
1052
1053sub read_vm_firewall_rules {
1054 my ($vmdata) = @_;
1055 my $rules = {};
1056 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1057 my $filename = "/etc/pve/firewall/$vmid.fw";
1058 my $fh = IO::File->new($filename, O_RDONLY);
1059 next if !$fh;
1060
51bae274 1061 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1062 }
1063
1064 return $rules;
1065}
1066
1067sub compile {
5e1267a5
DM		 1068 my $vmdata = read_local_vm_config();
1069 my $rules = read_vm_firewall_rules($vmdata);
51bae274
DM		 1070
1071 my $group_rules = {};
1072 my $filename = "/etc/pve/firewall/groups.fw";
1073 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1074 $group_rules = parse_group_fw_rules($filename, $fh);
1075 }
5e1267a5 1076
3fa83edf
DM		 1077 #print Dumper($rules);
1078
1079 my $ruleset = {};
1080
1081 # setup host firewall rules
dec84fcd
DM		 1082 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1083 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3fa83edf 1084
4e6112f9
DM		 1085 ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK");
1086 ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
1087
51bae274
DM		 1088 $filename = "/etc/pve/local/host.fw";
1089 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1090 my $host_rules = parse_host_fw_rules($filename, $fh);
1091 enablehostfw($ruleset, $host_rules, $group_rules);
1092 }
3fa83edf
DM		 1093
1094 # generate firewall rules for QEMU VMs
1095 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1096 my $conf = $vmdata->{qemu}->{$vmid};
1097 next if !$rules->{$vmid};
1098
1099 foreach my $netid (keys %$conf) {
1100 next if $netid !~ m/^net(\d+)$/;
1101 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1102 next if !$net;
1103 my $iface = "tap${vmid}i$1";
5e1267a5 1104
3fa83edf
DM		 1105 my $bridge = $net->{bridge};
1106 next if !$bridge; # fixme: ?
1107
1108 $bridge .= "v$net->{tag}" if $net->{tag};
1109
1110 generate_bridge_chains($ruleset, $bridge);
1111
c29f55c9 1112 my $macaddr = $net->{macaddr};
51bae274
DM		 1113 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN');
1114 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out}, $bridge, 'OUT');
3fa83edf
DM		 1115 }
1116 }
c0413e35
DM		 1117
1118 # allow traffic from lo (ourself)
1119 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1120
3fa83edf
DM		 1121 return $ruleset;
1122}
1123
1124sub get_ruleset_status {
1125 my ($ruleset, $verbose) = @_;
1126
1127 my $active_chains = iptables_get_chains();
1128
1129 my $statushash = {};
1130
1131 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1132 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1133 foreach my $cmd (@{$ruleset->{$chain}}) {
1134 $digest->add("$cmd\n");
1135 }
1136 my $sig = $digest->b64digest;
1137 $statushash->{$chain}->{sig} = $sig;
1138
1139 my $oldsig = $active_chains->{$chain};
1140 if (!defined($oldsig)) {
1141 $statushash->{$chain}->{action} = 'create';
1142 } else {
1143 if ($oldsig eq $sig) {
1144 $statushash->{$chain}->{action} = 'exists';
1145 } else {
1146 $statushash->{$chain}->{action} = 'update';
1147 }
1148 }
1149 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1150 foreach my $cmd (@{$ruleset->{$chain}}) {
1151 print "\t$cmd\n" if $verbose;
1152 }
1153 }
1154
1155 foreach my $chain (sort keys %$active_chains) {
1156 if (!defined($ruleset->{$chain})) {
1157 my $sig = $active_chains->{$chain};
1158 $statushash->{$chain}->{action} = 'delete';
1159 $statushash->{$chain}->{sig} = $sig;
1160 print "delete $chain ($sig)\n" if $verbose;
1161 }
1162 }
1163
1164 return $statushash;
1165}
1166
1167sub print_ruleset {
1168 my ($ruleset) = @_;
1169
1170 get_ruleset_status($ruleset, 1);
1171}
1172
1173sub print_sig_rule {
1174 my ($chain, $sig) = @_;
1175
09d5f68e
DM		 1176 # We just use this to store a SHA1 checksum used to detect changes
1177 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1178}
1179
a84f4d96
DM		 1180sub apply_ruleset {
1181 my ($ruleset, $verbose) = @_;
3fa83edf 1182
a84f4d96 1183 enable_bridge_firewall();
3fa83edf
DM		 1184
1185 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1186
1187 my $statushash = get_ruleset_status($ruleset, $verbose);
1188
1189 # create missing chains first
1190 foreach my $chain (sort keys %$ruleset) {
1191 my $stat = $statushash->{$chain};
1192 die "internal error" if !$stat;
1193 next if $stat->{action} ne 'create';
886aba9c 1194
3fa83edf
DM		 1195 $cmdlist .= ":$chain - [0:0]\n";
1196 }
1197
dec84fcd 1198 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1199 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1200 $cmdlist .= "-A $rule\n";
1201 }
dec84fcd 1202 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1203 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1204 $cmdlist .= "-A $rule\n";
1205 }
1206
dec84fcd 1207 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1208 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1209 $cmdlist .= "-A $rule\n";
1210 }
1211
1212 foreach my $chain (sort keys %$ruleset) {
1213 my $stat = $statushash->{$chain};
1214 die "internal error" if !$stat;
1215
1216 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1217 $cmdlist .= "-F $chain\n";
1218 foreach my $cmd (@{$ruleset->{$chain}}) {
1219 $cmdlist .= "$cmd\n";
1220 }
1221 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1222 } elsif ($stat->{action} eq 'delete') {
f5d28682 1223 die "internal error"; # this should not happen
3fa83edf
DM		 1224 } elsif ($stat->{action} eq 'exists') {
1225 # do nothing
1226 } else {
1227 die "internal error - unknown status '$stat->{action}'";
1228 }
1229 }
1230
f5d28682
DM		 1231 foreach my $chain (keys %$statushash) {
1232 next if $statushash->{$chain}->{action} ne 'delete';
1233 $cmdlist .= "-F $chain\n";
1234 }
1235 foreach my $chain (keys %$statushash) {
1236 next if $statushash->{$chain}->{action} ne 'delete';
1237 $cmdlist .= "-X $chain\n";
1238 }
1239
3fa83edf
DM		 1240 $cmdlist .= "COMMIT\n";
1241
1242 print $cmdlist if $verbose;
1243
1244 iptables_restore_cmdlist($cmdlist);
1245
1246 # test: re-read status and check if everything is up to date
1247 $statushash = get_ruleset_status($ruleset);
1248
1249 my $errors;
1250 foreach my $chain (sort keys %$ruleset) {
1251 my $stat = $statushash->{$chain};
1252 if ($stat->{action} ne 'exists') {
1253 warn "unable to update chain '$chain'\n";
1254 $errors = 1;
1255 }
1256 }
b6360c3f 1257
3fa83edf 1258 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1259}
1260
b6360c3f 12611;
Firewall test scripts