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implemented ipset rules in iptables
[pve-firewall.git] / src / PVE / Firewall.pm
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b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
c8301d63 7use PVE::INotify;
54cd19a8 8use PVE::JSONSchema qw(get_standard_option);
c8301d63 9use PVE::Cluster;
5f0a912c 10use PVE::ProcFSTools;
f789653a 11use PVE::Tools;
6b9f68a2 12use File::Basename;
5e1267a5
DM		 13use File::Path;
14use IO::File;
ecbea048 15use Net::IP;
06320eb0 16use PVE::Tools qw(run_command lock_file);
30c1ae52 17use Encode;
ecbea048 18
63c91681 19my $hostfw_conf_filename = "/etc/pve/local/host.fw";
fca39c2c
DM		 20my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
21
d9fee004
DM		 22# dynamically include PVE::QemuServer and PVE::OpenVZ
23# to avoid dependency problems
24my $have_qemu_server;
25eval {
26 require PVE::QemuServer;
27 $have_qemu_server = 1;
28};
29
30my $have_pve_manager;
31eval {
32 require PVE::OpenVZ;
33 $have_pve_manager = 1;
34};
35
5e1267a5 36use Data::Dumper;
b6360c3f 37
c8301d63
DM		 38my $nodename = PVE::INotify::nodename();
39
06320eb0 40my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 41my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 42
2d404ffc
DM		 43my $default_log_level = 'info';
44
45my $log_level_hash = {
46 debug => 7,
47 info => 6,
48 notice => 5,
49 warning => 4,
50 err => 3,
51 crit => 2,
52 alert => 1,
53 emerg => 0,
54};
55
857f62c8 56# imported/converted from: /usr/share/shorewall/macro.*
961b4928 57my $pve_fw_macros = {
857f62c8
DM		 58 'Amanda' => [
59 { action => 'PARAM', proto => 'udp', dport => '10080' },
60 { action => 'PARAM', proto => 'tcp', dport => '10080' },
61 ],
62 'Auth' => [
63 { action => 'PARAM', proto => 'tcp', dport => '113' },
64 ],
65 'BGP' => [
66 { action => 'PARAM', proto => 'tcp', dport => '179' },
67 ],
68 'BitTorrent' => [
961b4928 69 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 70 { action => 'PARAM', proto => 'udp', dport => '6881' },
71 ],
72 'BitTorrent32' => [
73 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
74 { action => 'PARAM', proto => 'udp', dport => '6881' },
75 ],
76 'CVS' => [
77 { action => 'PARAM', proto => 'tcp', dport => '2401' },
78 ],
79 'Citrix' => [
80 { action => 'PARAM', proto => 'tcp', dport => '1494' },
81 { action => 'PARAM', proto => 'udp', dport => '1604' },
82 { action => 'PARAM', proto => 'tcp', dport => '2598' },
83 ],
84 'DAAP' => [
85 { action => 'PARAM', proto => 'tcp', dport => '3689' },
86 { action => 'PARAM', proto => 'udp', dport => '3689' },
87 ],
88 'DCC' => [
89 { action => 'PARAM', proto => 'tcp', dport => '6277' },
90 ],
91 'DHCPfwd' => [
92 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
93 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
94 ],
95 'DNS' => [
96 { action => 'PARAM', proto => 'udp', dport => '53' },
97 { action => 'PARAM', proto => 'tcp', dport => '53' },
98 ],
99 'Distcc' => [
100 { action => 'PARAM', proto => 'tcp', dport => '3632' },
101 ],
102 'Edonkey' => [
103 { action => 'PARAM', proto => 'tcp', dport => '4662' },
104 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 105 ],
857f62c8
DM		 106 'FTP' => [
107 { action => 'PARAM', proto => 'tcp', dport => '21' },
108 ],
109 'Finger' => [
110 { action => 'PARAM', proto => 'tcp', dport => '79' },
111 ],
112 'GNUnet' => [
113 { action => 'PARAM', proto => 'tcp', dport => '2086' },
114 { action => 'PARAM', proto => 'udp', dport => '2086' },
115 { action => 'PARAM', proto => 'tcp', dport => '1080' },
116 { action => 'PARAM', proto => 'udp', dport => '1080' },
117 ],
118 'GRE' => [
119 { action => 'PARAM', proto => '47' },
120 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
121 ],
122 'Git' => [
123 { action => 'PARAM', proto => 'tcp', dport => '9418' },
124 ],
125 'Gnutella' => [
126 { action => 'PARAM', proto => 'tcp', dport => '6346' },
127 { action => 'PARAM', proto => 'udp', dport => '6346' },
128 ],
129 'HKP' => [
130 { action => 'PARAM', proto => 'tcp', dport => '11371' },
131 ],
132 'HTTP' => [
961b4928
DM		 133 { action => 'PARAM', proto => 'tcp', dport => '80' },
134 ],
857f62c8
DM		 135 'HTTPS' => [
136 { action => 'PARAM', proto => 'tcp', dport => '443' },
137 ],
138 'ICPV2' => [
139 { action => 'PARAM', proto => 'udp', dport => '3130' },
140 ],
141 'ICQ' => [
142 { action => 'PARAM', proto => 'tcp', dport => '5190' },
143 ],
144 'IMAP' => [
145 { action => 'PARAM', proto => 'tcp', dport => '143' },
146 ],
147 'IMAPS' => [
148 { action => 'PARAM', proto => 'tcp', dport => '993' },
149 ],
150 'IPIP' => [
151 { action => 'PARAM', proto => '94' },
152 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
153 ],
154 'IPP' => [
155 { action => 'PARAM', proto => 'tcp', dport => '631' },
156 ],
157 'IPPbrd' => [
158 { action => 'PARAM', proto => 'udp', dport => '631' },
159 ],
160 'IPPserver' => [
161 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
162 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
163 ],
164 'IPsec' => [
165 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
166 { action => 'PARAM', proto => '50' },
167 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
168 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
169 ],
170 'IPsecah' => [
171 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
172 { action => 'PARAM', proto => '51' },
173 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
174 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
175 ],
176 'IPsecnat' => [
177 { action => 'PARAM', proto => 'udp', dport => '500' },
178 { action => 'PARAM', proto => 'udp', dport => '4500' },
179 { action => 'PARAM', proto => '50' },
180 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
181 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
182 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
183 ],
184 'IRC' => [
185 { action => 'PARAM', proto => 'tcp', dport => '6667' },
186 ],
187 'JabberPlain' => [
188 { action => 'PARAM', proto => 'tcp', dport => '5222' },
189 ],
190 'JabberSecure' => [
191 { action => 'PARAM', proto => 'tcp', dport => '5223' },
192 ],
193 'Jabberd' => [
194 { action => 'PARAM', proto => 'tcp', dport => '5269' },
195 ],
196 'Jetdirect' => [
197 { action => 'PARAM', proto => 'tcp', dport => '9100' },
198 ],
199 'L2TP' => [
200 { action => 'PARAM', proto => 'udp', dport => '1701' },
201 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
202 ],
203 'LDAP' => [
204 { action => 'PARAM', proto => 'tcp', dport => '389' },
205 ],
206 'LDAPS' => [
207 { action => 'PARAM', proto => 'tcp', dport => '636' },
208 ],
209 'MSNP' => [
210 { action => 'PARAM', proto => 'tcp', dport => '1863' },
211 ],
212 'MSSQL' => [
213 { action => 'PARAM', proto => 'tcp', dport => '1433' },
214 ],
215 'Mail' => [
216 { action => 'PARAM', proto => 'tcp', dport => '25' },
217 { action => 'PARAM', proto => 'tcp', dport => '465' },
218 { action => 'PARAM', proto => 'tcp', dport => '587' },
219 ],
220 'Munin' => [
221 { action => 'PARAM', proto => 'tcp', dport => '4949' },
222 ],
223 'MySQL' => [
224 { action => 'PARAM', proto => 'tcp', dport => '3306' },
225 ],
226 'NNTP' => [
227 { action => 'PARAM', proto => 'tcp', dport => '119' },
228 ],
229 'NNTPS' => [
230 { action => 'PARAM', proto => 'tcp', dport => '563' },
231 ],
232 'NTP' => [
233 { action => 'PARAM', proto => 'udp', dport => '123' },
234 ],
235 'NTPbi' => [
236 { action => 'PARAM', proto => 'udp', dport => '123' },
237 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
238 ],
239 'NTPbrd' => [
240 { action => 'PARAM', proto => 'udp', dport => '123' },
241 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
242 ],
243 'OSPF' => [
244 { action => 'PARAM', proto => '89' },
245 ],
246 'OpenVPN' => [
247 { action => 'PARAM', proto => 'udp', dport => '1194' },
248 ],
249 'PCA' => [
250 { action => 'PARAM', proto => 'udp', dport => '5632' },
251 { action => 'PARAM', proto => 'tcp', dport => '5631' },
252 ],
253 'POP3' => [
254 { action => 'PARAM', proto => 'tcp', dport => '110' },
255 ],
256 'POP3S' => [
257 { action => 'PARAM', proto => 'tcp', dport => '995' },
258 ],
259 'PPtP' => [
260 { action => 'PARAM', proto => '47' },
261 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
262 { action => 'PARAM', proto => 'tcp', dport => '1723' },
263 ],
264 'Ping' => [
269d4f13 265 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 266 ],
267 'PostgreSQL' => [
268 { action => 'PARAM', proto => 'tcp', dport => '5432' },
269 ],
270 'Printer' => [
271 { action => 'PARAM', proto => 'tcp', dport => '515' },
272 ],
273 'RDP' => [
274 { action => 'PARAM', proto => 'tcp', dport => '3389' },
275 ],
276 'RIPbi' => [
277 { action => 'PARAM', proto => 'udp', dport => '520' },
278 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
279 ],
280 'RNDC' => [
281 { action => 'PARAM', proto => 'tcp', dport => '953' },
282 ],
283 'Razor' => [
284 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
285 ],
286 'Rdate' => [
287 { action => 'PARAM', proto => 'tcp', dport => '37' },
288 ],
289 'Rsync' => [
290 { action => 'PARAM', proto => 'tcp', dport => '873' },
291 ],
292 'SANE' => [
293 { action => 'PARAM', proto => 'tcp', dport => '6566' },
294 ],
295 'SMB' => [
296 { action => 'PARAM', proto => 'udp', dport => '135,445' },
297 { action => 'PARAM', proto => 'udp', dport => '137:139' },
298 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
299 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
300 ],
301 'SMBBI' => [
302 { action => 'PARAM', proto => 'udp', dport => '135,445' },
303 { action => 'PARAM', proto => 'udp', dport => '137:139' },
304 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
305 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
306 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
307 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
308 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
309 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
310 ],
311 'SMBswat' => [
312 { action => 'PARAM', proto => 'tcp', dport => '901' },
313 ],
314 'SMTP' => [
315 { action => 'PARAM', proto => 'tcp', dport => '25' },
316 ],
317 'SMTPS' => [
318 { action => 'PARAM', proto => 'tcp', dport => '465' },
319 ],
320 'SNMP' => [
321 { action => 'PARAM', proto => 'udp', dport => '161:162' },
322 { action => 'PARAM', proto => 'tcp', dport => '161' },
323 ],
324 'SPAMD' => [
325 { action => 'PARAM', proto => 'tcp', dport => '783' },
326 ],
327 'SSH' => [
328 { action => 'PARAM', proto => 'tcp', dport => '22' },
329 ],
330 'SVN' => [
331 { action => 'PARAM', proto => 'tcp', dport => '3690' },
332 ],
333 'SixXS' => [
334 { action => 'PARAM', proto => 'tcp', dport => '3874' },
335 { action => 'PARAM', proto => 'udp', dport => '3740' },
336 { action => 'PARAM', proto => '41' },
337 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
338 ],
339 'Squid' => [
340 { action => 'PARAM', proto => 'tcp', dport => '3128' },
341 ],
342 'Submission' => [
343 { action => 'PARAM', proto => 'tcp', dport => '587' },
344 ],
345 'Syslog' => [
346 { action => 'PARAM', proto => 'udp', dport => '514' },
347 { action => 'PARAM', proto => 'tcp', dport => '514' },
348 ],
349 'TFTP' => [
350 { action => 'PARAM', proto => 'udp', dport => '69' },
351 ],
352 'Telnet' => [
353 { action => 'PARAM', proto => 'tcp', dport => '23' },
354 ],
355 'Telnets' => [
356 { action => 'PARAM', proto => 'tcp', dport => '992' },
357 ],
358 'Time' => [
359 { action => 'PARAM', proto => 'tcp', dport => '37' },
360 ],
361 'Trcrt' => [
362 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 363 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 364 ],
365 'VNC' => [
366 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
367 ],
368 'VNCL' => [
369 { action => 'PARAM', proto => 'tcp', dport => '5500' },
370 ],
371 'Web' => [
372 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 373 { action => 'PARAM', proto => 'tcp', dport => '443' },
374 ],
857f62c8
DM		 375 'Webcache' => [
376 { action => 'PARAM', proto => 'tcp', dport => '8080' },
377 ],
378 'Webmin' => [
379 { action => 'PARAM', proto => 'tcp', dport => '10000' },
380 ],
381 'Whois' => [
382 { action => 'PARAM', proto => 'tcp', dport => '43' },
383 ],
961b4928
DM		 384};
385
386my $pve_fw_parsed_macros;
387my $pve_fw_preferred_macro_names = {};
3a616aa0 388
d8f2505e
DM		 389my $pve_std_chains = {
390 'PVEFW-SET-ACCEPT-MARK' => [
391 "-j MARK --set-mark 1",
392 ],
79929d9c
DM		 393 'PVEFW-DropBroadcast' => [
394 # same as shorewall 'Broadcast'
395 # simply DROP BROADCAST/MULTICAST/ANYCAST
396 # we can use this to reduce logging
397 { action => 'DROP', dsttype => 'BROADCAST' },
398 { action => 'DROP', dsttype => 'MULTICAST' },
399 { action => 'DROP', dsttype => 'ANYCAST' },
400 { action => 'DROP', dest => '224.0.0.0/4' },
401 ],
402 'PVEFW-reject' => [
403 # same as shorewall 'reject'
404 { action => 'DROP', dsttype => 'BROADCAST' },
405 { action => 'DROP', source => '224.0.0.0/4' },
406 { action => 'DROP', proto => 'icmp' },
407 "-p tcp -j REJECT --reject-with tcp-reset",
408 "-p udp -j REJECT --reject-with icmp-port-unreachable",
409 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
410 "-j REJECT --reject-with icmp-host-prohibited",
411 ],
412 'PVEFW-Drop' => [
413 # same as shorewall 'Drop', which is equal to DROP,
414 # but REJECT/DROP some packages to reduce logging,
415 # and ACCEPT critical ICMP types
416 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
417 # we are not interested in BROADCAST/MULTICAST/ANYCAST
418 { action => 'PVEFW-DropBroadcast' },
419 # ACCEPT critical ICMP types
420 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
421 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
422 # Drop packets with INVALID state
423 "-m conntrack --ctstate INVALID -j DROP",
424 # Drop Microsoft SMB noise
425 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
426 { action => 'DROP', proto => 'udp', dport => '137:139'},
427 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
428 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
429 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
430 # Drop new/NotSyn traffic so that it doesn't get logged
431 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
432 # Drop DNS replies
433 { action => 'DROP', proto => 'udp', sport => 53 },
434 ],
435 'PVEFW-Reject' => [
436 # same as shorewall 'Reject', which is equal to Reject,
437 # but REJECT/DROP some packages to reduce logging,
438 # and ACCEPT critical ICMP types
439 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
440 # we are not interested in BROADCAST/MULTICAST/ANYCAST
441 { action => 'PVEFW-DropBroadcast' },
442 # ACCEPT critical ICMP types
443 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
444 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
445 # Drop packets with INVALID state
446 "-m conntrack --ctstate INVALID -j DROP",
447 # Drop Microsoft SMB noise
448 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
449 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
450 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
451 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
452 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
453 # Drop new/NotSyn traffic so that it doesn't get logged
454 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
455 # Drop DNS replies
456 { action => 'DROP', proto => 'udp', sport => 53 },
457 ],
d86659ef
DM		 458 'PVEFW-tcpflags' => [
459 # same as shorewall tcpflags action.
460 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
461 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
462 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
463 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
464 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
465 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
466 ],
bee633ab
DM		 467 'PVEFW-smurfs' => [
468 # same as shorewall smurfs action
469 # Filter packets for smurfs (packets with a broadcast address as the source).
470 "-s 0.0.0.0/32 -j RETURN",
471 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
472 "-s 224.0.0.0/4 -g PVEFW-smurflog",
473 ],
d8f2505e
DM		 474};
475
4b586518
DM		 476# iptables -p icmp -h
477my $icmp_type_names = {
478 any => 1,
479 'echo-reply' => 1,
480 'destination-unreachable' => 1,
481 'network-unreachable' => 1,
482 'host-unreachable' => 1,
483 'protocol-unreachable' => 1,
484 'port-unreachable' => 1,
485 'fragmentation-needed' => 1,
486 'source-route-failed' => 1,
487 'network-unknown' => 1,
488 'host-unknown' => 1,
489 'network-prohibited' => 1,
490 'host-prohibited' => 1,
491 'TOS-network-unreachable' => 1,
492 'TOS-host-unreachable' => 1,
493 'communication-prohibited' => 1,
494 'host-precedence-violation' => 1,
495 'precedence-cutoff' => 1,
496 'source-quench' => 1,
497 'redirect' => 1,
498 'network-redirect' => 1,
499 'host-redirect' => 1,
500 'TOS-network-redirect' => 1,
501 'TOS-host-redirect' => 1,
502 'echo-request' => 1,
503 'router-advertisement' => 1,
504 'router-solicitation' => 1,
505 'time-exceeded' => 1,
506 'ttl-zero-during-transit' => 1,
507 'ttl-zero-during-reassembly' => 1,
508 'parameter-problem' => 1,
509 'ip-header-bad' => 1,
510 'required-option-missing' => 1,
511 'timestamp-request' => 1,
512 'timestamp-reply' => 1,
513 'address-mask-request' => 1,
514 'address-mask-reply' => 1,
515};
516
54cd19a8 517sub init_firewall_macros {
6158271d 518
961b4928 519 $pve_fw_parsed_macros = {};
9aab3127 520
961b4928 521 foreach my $k (keys %$pve_fw_macros) {
e5076eee
DM		 522 my $lc_name = lc($k);
523 my $macro = $pve_fw_macros->{$k};
524 $pve_fw_preferred_macro_names->{$lc_name} = $k;
525 $pve_fw_parsed_macros->{$k} = $macro;
961b4928 526 }
9aab3127
DM		 527}
528
54cd19a8
DM		 529init_firewall_macros();
530
fcba0beb
DM		 531my $etc_services;
532
533sub get_etc_services {
534
535 return $etc_services if $etc_services;
536
537 my $filename = "/etc/services";
538
539 my $fh = IO::File->new($filename, O_RDONLY);
540 if (!$fh) {
541 warn "unable to read '$filename' - $!\n";
542 return {};
543 }
544
545 my $services = {};
546
547 while (my $line = <$fh>) {
548 chomp ($line);
549 next if $line =~m/^#/;
550 next if ($line =~m/^\s*$/);
551
552 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
553 $services->{byid}->{$2}->{name} = $1;
35b66e9d 554 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 555 $services->{byid}->{$2}->{$3} = 1;
556 $services->{byname}->{$1} = $services->{byid}->{$2};
557 }
558 }
559
560 close($fh);
561
6158271d
DM		 562 $etc_services = $services;
563
3a616aa0 564
fcba0beb
DM		 565 return $etc_services;
566}
567
568my $etc_protocols;
569
570sub get_etc_protocols {
571 return $etc_protocols if $etc_protocols;
572
573 my $filename = "/etc/protocols";
574
575 my $fh = IO::File->new($filename, O_RDONLY);
576 if (!$fh) {
577 warn "unable to read '$filename' - $!\n";
578 return {};
579 }
580
581 my $protocols = {};
582
583 while (my $line = <$fh>) {
584 chomp ($line);
585 next if $line =~m/^#/;
586 next if ($line =~m/^\s*$/);
587
588 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
589 $protocols->{byid}->{$2}->{name} = $1;
590 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
591 }
592 }
593
594 close($fh);
595
596 $etc_protocols = $protocols;
597
598 return $etc_protocols;
599}
600
ecbea048
DM		 601sub parse_address_list {
602 my ($str) = @_;
603
d6de1dc2 604 my $nbaor = 0;
ecbea048 605 foreach my $aor (split(/,/, $str)) {
ba791b1f
AD		 606 if($nbaor > 0 && $aor =~ m/-/){
607 die "you can use a range in a list";
608 }
ecbea048
DM		 609 if (!Net::IP->new($aor)) {
610 my $err = Net::IP::Error();
611 die "invalid IP address: $err\n";
d6de1dc2
AD		 612 }else{
613 $nbaor++;
ecbea048
DM		 614 }
615 }
616}
dddd9413 617
fcba0beb
DM		 618sub parse_port_name_number_or_range {
619 my ($str) = @_;
620
621 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 622 my $nbports = 0;
fcba0beb 623 foreach my $item (split(/,/, $str)) {
4cdbb3b7 624 my $portlist = "";
35b66e9d 625 my $oldpon = undef;
4b586518 626 $nbports++;
fcba0beb 627 foreach my $pon (split(':', $item, 2)) {
35b66e9d 628 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 629 if ($pon =~ m/^\d+$/){
857f62c8 630 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 631 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
632 $oldpon = $pon;
4cdbb3b7
AD		 633 }else{
634 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
635 }
fcba0beb
DM		 636 }
637 }
638
4cdbb3b7 639 return ($nbports);
fcba0beb
DM		 640}
641
54cd19a8
DM		 642PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
643sub pve_fw_verify_port_spec {
644 my ($portstr) = @_;
645
646 parse_port_name_number_or_range($portstr);
647
648 return $portstr;
649}
650
651PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
652sub pve_fw_verify_v4addr_spec {
653 my ($list) = @_;
654
655 parse_address_list($list);
656
657 return $list;
658}
659
660PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
661sub pve_fw_verify_protocol_spec {
662 my ($proto) = @_;
663
664 my $protocols = get_etc_protocols();
665
666 die "unknown protocol '$proto'\n" if $proto &&
667 !(defined($protocols->{byname}->{$proto}) ||
668 defined($protocols->{byid}->{$proto}));
669
670 return $proto;
671}
672
673
d1c53b3e 674# helper function for API
d1c53b3e 675
9c7e0858
DM		 676my $rule_properties = {
677 pos => {
678 description => "Update rule at position <pos>.",
679 type => 'integer',
680 minimum => 0,
681 optional => 1,
682 },
683 digest => {
684 type => 'string',
685 optional => 1,
54cd19a8
DM		 686 maxLength => 27,
687 minLength => 27,
9c7e0858
DM		 688 },
689 type => {
690 type => 'string',
691 optional => 1,
692 enum => ['in', 'out', 'group'],
693 },
694 action => {
695 type => 'string',
696 optional => 1,
54cd19a8 697 enum => ['ACCEPT', 'DROP', 'REJECT'],
9c7e0858 698 },
e5076eee
DM		 699 macro => {
700 type => 'string',
701 optional => 1,
54cd19a8 702 maxLength => 128,
e5076eee 703 },
54cd19a8 704 iface => get_standard_option('pve-iface', { optional => 1 }),
9c7e0858 705 source => {
54cd19a8 706 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 707 optional => 1,
708 },
709 dest => {
54cd19a8 710 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 711 optional => 1,
712 },
713 proto => {
54cd19a8 714 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 715 optional => 1,
716 },
717 enable => {
718 type => 'boolean',
719 optional => 1,
720 },
721 sport => {
54cd19a8 722 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 723 optional => 1,
724 },
725 dport => {
54cd19a8 726 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 727 optional => 1,
728 },
729 comment => {
730 type => 'string',
731 optional => 1,
732 },
733};
734
ce36326d
DM		 735sub cleanup_fw_rule {
736 my ($rule, $digest, $pos) = @_;
737
738 my $r = {};
739
740 foreach my $k (keys %$rule) {
741 next if !$rule_properties->{$k};
742 my $v = $rule->{$k};
743 next if !defined($v);
744 $r->{$k} = $v;
745 $r->{digest} = $digest;
746 $r->{pos} = $pos;
747 }
748
749 return $r;
750}
751
9c7e0858
DM		 752sub add_rule_properties {
753 my ($properties) = @_;
754
755 foreach my $k (keys %$rule_properties) {
756 $properties->{$k} = $rule_properties->{$k};
757 }
758
759 return $properties;
760}
761
762sub copy_rule_data {
763 my ($rule, $param) = @_;
764
765 foreach my $k (keys %$rule_properties) {
766 if (defined(my $v = $param->{$k})) {
767 if ($v eq '' || $v eq '-') {
768 delete $rule->{$k};
769 } else {
770 $rule->{$k} = $v;
771 }
772 } else {
773 delete $rule->{$k};
774 }
775 }
776 return $rule;
777}
778
779# core functions
780bcc0f
DM		 780my $bridge_firewall_enabled = 0;
781
782sub enable_bridge_firewall {
783
784 return if $bridge_firewall_enabled; # only once
785
5f0a912c
DM		 786 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
787 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 788
6a8a75db
DM		 789 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
790 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
791
780bcc0f
DM		 792 $bridge_firewall_enabled = 1;
793}
794
8cebfa6f 795my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 796
b16e818e
DM		 797sub iptables_restore_cmdlist {
798 my ($cmdlist) = @_;
3a616aa0 799
3fa83edf 800 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 801}
802
34cdedfa
AD		 803sub ipset_restore_cmdlist {
804 my ($cmdlist) = @_;
805
dd7a13fd 806 run_command("/usr/sbin/ipset restore", input => $cmdlist);
34cdedfa
AD		 807}
808
de2a57cd
DM		 809sub iptables_get_chains {
810
811 my $res = {};
812
813 # check what chains we want to track
814 my $is_pvefw_chain = sub {
815 my $name = shift;
816
dec84fcd
DM		 817 return 1 if $name =~ m/^PVEFW-\S+$/;
818
de2a57cd 819 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 820
821 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
822
9e15114a
DM		 823 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
824
da6fc60b 825 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
f50656c2 826 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 827
828 return undef;
829 };
830
831 my $table = '';
832
c4a2e5ae
DM		 833 my $hooks = {};
834
de2a57cd
DM		 835 my $parser = sub {
836 my $line = shift;
837
838 return if $line =~ m/^#/;
839 return if $line =~ m/^\s*$/;
840
841 if ($line =~ m/^\*(\S+)$/) {
842 $table = $1;
843 return;
844 }
845
846 return if $table ne 'filter';
847
848 if ($line =~ m/^:(\S+)\s/) {
849 my $chain = $1;
850 return if !&$is_pvefw_chain($chain);
3fa83edf 851 $res->{$chain} = "unknown";
09d5f68e 852 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 853 my ($chain, $sig) = ($1, $2);
de2a57cd 854 return if !&$is_pvefw_chain($chain);
3fa83edf 855 $res->{$chain} = $sig;
c4a2e5ae
DM		 856 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
857 $hooks->{$1} = 1;
de2a57cd
DM		 858 } else {
859 # simply ignore the rest
860 return;
861 }
862 };
863
864 run_command("/sbin/iptables-save", outfunc => $parser);
865
c4a2e5ae 866 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 867}
868
9bf7d929
DM		 869sub iptables_chain_digest {
870 my ($rules) = @_;
871 my $digest = Digest::SHA->new('sha1');
872 foreach my $rule (@$rules) { # order is important
873 $digest->add($rule);
874 }
875 return $digest->b64digest;
876}
877
3f95d14a
DM		 878sub ipset_chain_digest {
879 my ($rules) = @_;
4bd0a9c4 880
3f95d14a
DM		 881 my $digest = Digest::SHA->new('sha1');
882 foreach my $rule (sort @$rules) { # note: sorted
883 $digest->add($rule);
884 }
885 return $digest->b64digest;
886}
887
34cdedfa
AD		 888sub ipset_get_chains {
889
890 my $res = {};
891 my $chains = {};
892
893 my $parser = sub {
894 my $line = shift;
895
896 return if $line =~ m/^#/;
897 return if $line =~ m/^\s*$/;
81a0bf43
DM		 898 if ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
899 my $chain = $1;
900 $line =~ s/\s+$//; # delete trailing white space
901 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 902 } else {
903 # simply ignore the rest
904 return;
905 }
906 };
907
3f95d14a 908 run_command("/usr/sbin/ipset save", outfunc => $parser);
34cdedfa 909
3f95d14a
DM		 910 # compute digest for each chain
911 foreach my $chain (keys %$chains) {
912 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 913 }
914
915 return $res;
916}
917
eba0fb64 918sub ruleset_generate_cmdstr {
ba791b1f 919 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
3a616aa0 920
00bb4391 921 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 922
e5076eee
DM		 923 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
924
925 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
926 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
e5076eee 927
41524a58 928 my @cmd = ();
3a616aa0 929
eba0fb64
DM		 930 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
931 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
932
ba791b1f
AD		 933 my $source = $rule->{source};
934 my $dest = $rule->{dest};
935
936 if ($source){
937 if($source =~ m/^(\+)(\S+)$/){
938 die "no such netgroup $2" if !$cluster_conf->{ipset}->{$2};
939 push @cmd, "-m set --match-set $2 src";
940
941 }elsif ($source =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
942 push @cmd, "-m iprange --src-range $source";
943
944 }else{
945 push @cmd, "-s $source";
946 }
947 }
948
949 if ($dest){
950 if($dest =~ m/^(\+)(\S+)$/){
951 die "no such netgroup $2" if !$cluster_conf->{ipset}->{$2};
952 push @cmd, "-m set --match-set $2 dst";
953
954 }elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
955 push @cmd, "-m iprange --dst-range $dest";
956
957 }else{
958 push @cmd, "-s $dest";
959 }
960 }
4b586518 961
181390b0 962 if ($rule->{proto}) {
41524a58 963 push @cmd, "-p $rule->{proto}";
e3a1d391 964
181390b0 965 my $multiport = 0;
e5076eee
DM		 966 $multiport++ if $nbdport > 1;
967 $multiport++ if $nbsport > 1;
e3a1d391 968
41524a58 969 push @cmd, "--match multiport" if $multiport;
4b586518 970
181390b0
DM		 971 die "multiport: option '--sports' cannot be used together with '--dports'\n"
972 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
973
974 if ($rule->{dport}) {
975 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
976 # Note: we use dport to store --icmp-type
977 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 978 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0 979 } else {
e5076eee 980 if ($nbdport > 1) {
181390b0 981 if ($multiport == 2) {
41524a58 982 push @cmd, "--ports $rule->{dport}";
181390b0 983 } else {
41524a58 984 push @cmd, "--dports $rule->{dport}";
181390b0 985 }
e3a1d391 986 } else {
41524a58 987 push @cmd, "--dport $rule->{dport}";
e3a1d391 988 }
4b586518
DM		 989 }
990 }
4b586518 991
181390b0 992 if ($rule->{sport}) {
e5076eee 993 if ($nbsport > 1) {
41524a58 994 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 995 } else {
41524a58 996 push @cmd, "--sport $rule->{sport}";
181390b0 997 }
4b586518 998 }
181390b0
DM		 999 } elsif ($rule->{dport} || $rule->{sport}) {
1000 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1001 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 1002 }
1003
41524a58 1004 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 1005
1006 if (my $action = $rule->{action}) {
2f906466 1007 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 1008 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 1009 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 1010 }
3a616aa0 1011
eba0fb64
DM		 1012 return scalar(@cmd) ? join(' ', @cmd) : undef;
1013}
1014
e5076eee
DM		 1015my $apply_macro = sub {
1016 my ($macro_name, $param) = @_;
1017
1018 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1019 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1020
1021 my $rules = [];
1022
1023 foreach my $templ (@$macro_rules) {
1024 my $rule = {};
1025 my $param_used = {};
1026 foreach my $k (keys %$templ) {
1027 my $v = $templ->{$k};
1028 if ($v eq 'PARAM') {
1029 $v = $param->{$k};
1030 $param_used->{$k} = 1;
1031 } elsif ($v eq 'DEST') {
1032 $v = $param->{dest};
1033 $param_used->{dest} = 1;
1034 } elsif ($v eq 'SOURCE') {
1035 $v = $param->{source};
1036 $param_used->{source} = 1;
1037 }
1038
1039 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1040 $rule->{$k} = $v;
1041 }
1042 foreach my $k (keys %$param) {
1043 next if $k eq 'macro';
1044 next if !defined($param->{$k});
1045 next if $param_used->{$k};
1046 if (defined($rule->{$k})) {
1047 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1048 if $rule->{$k} ne $param->{$k};
1049 } else {
1050 $rule->{$k} = $param->{$k};
1051 }
1052 }
1053 push @$rules, $rule;
1054 }
1055
1056 return $rules;
1057};
1058
eba0fb64 1059sub ruleset_generate_rule {
ba791b1f 1060 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
eba0fb64 1061
e5076eee
DM		 1062 my $rules;
1063
1064 if ($rule->{macro}) {
1065 $rules = &$apply_macro($rule->{macro}, $rule);
1066 } else {
1067 $rules = [ $rule ];
1068 }
1069
1070 foreach my $tmp (@$rules) {
ba791b1f 1071 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
e5076eee
DM		 1072 ruleset_addrule($ruleset, $chain, $cmdstr);
1073 }
41524a58 1074 }
3fa83edf 1075}
0f168d7b 1076
eba0fb64
DM		 1077sub ruleset_generate_rule_insert {
1078 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1079
e5076eee
DM		 1080 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1081
eba0fb64
DM		 1082 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1083 ruleset_insertrule($ruleset, $chain, $cmdstr);
1084 }
1085}
3fa83edf
DM		 1086
1087sub ruleset_create_chain {
1088 my ($ruleset, $chain) = @_;
3a616aa0 1089
d050c724 1090 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1091 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1092
3fa83edf
DM		 1093 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1094
1095 $ruleset->{$chain} = [];
3a616aa0
AD		 1096}
1097
3fa83edf
DM		 1098sub ruleset_chain_exist {
1099 my ($ruleset, $chain) = @_;
3a616aa0 1100
3fa83edf
DM		 1101 return $ruleset->{$chain} ? 1 : undef;
1102}
3a616aa0 1103
3fa83edf
DM		 1104sub ruleset_addrule {
1105 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1106
3fa83edf 1107 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1108
3fa83edf
DM		 1109 push @{$ruleset->{$chain}}, "-A $chain $rule";
1110}
3a616aa0 1111
3fa83edf
DM		 1112sub ruleset_insertrule {
1113 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1114
3fa83edf 1115 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1116
3fa83edf
DM		 1117 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1118}
3a616aa0 1119
782c4cde
DM		 1120sub get_log_rule_base {
1121 my ($chain, $vmid, $msg, $loglevel) = @_;
1122
1123 die "internal error - no log level" if !defined($loglevel);
1124
1125 $vmid = 0 if !defined($vmid);
1126
1127 # Note: we use special format for prefix to pass further
1128 # info to log daemon (VMID, LOGVELEL and CHAIN)
1129
1130 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1131}
1132
1133sub ruleset_addlog {
1134 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1135
1136 return if !defined($loglevel);
1137
1138 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1139
1140 $logrule = "$rule $logrule" if defined($rule);
1141
1142 ruleset_addrule($ruleset, $chain, $logrule)
1143}
1144
3fa83edf 1145sub generate_bridge_chains {
530c005e
DM		 1146 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1147
1148 my $options = $hostfw_conf->{options} || {};
1149
1150 die "error: detected direct route to bridge '$bridge'\n"
1151 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 1152
5927497d
DM		 1153 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1154 ruleset_create_chain($ruleset, "$bridge-FW");
3cc81077
DM		 1155 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1156 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
3fa83edf 1157 }
3a616aa0 1158
3fa83edf
DM		 1159 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1160 ruleset_create_chain($ruleset, "$bridge-OUT");
3cc81077
DM		 1161 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1162 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 1163 }
1164
1165 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1166 ruleset_create_chain($ruleset, "$bridge-IN");
3cc81077 1167 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
fdb0bf20 1168 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d 1169 # accept traffic to unmanaged bridge ports
3cc81077 1170 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 1171 }
1172}
3a616aa0 1173
ead850e8 1174sub ruleset_add_chain_policy {
782c4cde 1175 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 1176
1177 if ($policy eq 'ACCEPT') {
1178
1179 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1180 { ACCEPT => $accept_action});
1181
1182 } elsif ($policy eq 'DROP') {
1183
1184 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1185
782c4cde 1186 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1187
1188 ruleset_addrule($ruleset, $chain, "-j DROP");
1189 } elsif ($policy eq 'REJECT') {
1190 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1191
782c4cde 1192 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1193
1194 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1195 } else {
1196 # should not happen
1197 die "internal error: unknown policy '$policy'";
1198 }
1199}
1200
9e15114a
DM		 1201sub ruleset_create_vm_chain {
1202 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 1203
9e15114a 1204 ruleset_create_chain($ruleset, $chain);
b47ecc88 1205 my $accept = generate_nfqueue($options);
3a616aa0 1206
bee633ab 1207 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 1208 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM		 1209 }
1210
ce15d90b 1211 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 1212 if ($direction eq 'OUT') {
0f168d7b
DM		 1213 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1214 proto => 'udp', sport => 68, dport => 67 });
76a2d1e7 1215 } else {
0f168d7b
DM		 1216 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1217 proto => 'udp', sport => 67, dport => 68 });
76a2d1e7 1218 }
ce15d90b
DM		 1219 }
1220
bee633ab 1221 if ($options->{tcpflags}) {
9e15114a 1222 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM		 1223 }
1224
9e15114a 1225 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
b47ecc88
AD		 1226 if($direction eq 'OUT'){
1227 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
3a616aa0 1228
b47ecc88
AD		 1229 }else{
1230 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1231 }
b21aca2c
DM		 1232 if ($direction eq 'OUT') {
1233 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 1234 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 1235 }
9e15114a 1236 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 1237 }
b47ecc88
AD		 1238
1239
9e15114a
DM		 1240}
1241
1242sub ruleset_generate_vm_rules {
fca39c2c 1243 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
9e15114a
DM		 1244
1245 my $lc_direction = lc($direction);
c29f55c9 1246
92e976b3
DM		 1247 foreach my $rule (@$rules) {
1248 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1249 next if !$rule->{enable};
92e976b3
DM		 1250 if ($rule->{type} eq 'group') {
1251 my $group_chain = "GROUP-$rule->{action}-$direction";
1252 if(!ruleset_chain_exist($ruleset, $group_chain)){
fca39c2c 1253 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
92e976b3 1254 }
9e15114a 1255 ruleset_addrule($ruleset, $chain, "-j $group_chain");
b47ecc88
AD		 1256 if ($direction eq 'OUT'){
1257 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1258 }else{
1259 my $accept = generate_nfqueue($options);
1260 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1261 }
1262
92e976b3
DM		 1263 } else {
1264 next if $rule->{type} ne $lc_direction;
1265 if ($direction eq 'OUT') {
9e15114a 1266 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1267 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
4e6112f9 1268 } else {
b47ecc88 1269 my $accept = generate_nfqueue($options);
ba791b1f 1270 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
3a616aa0 1271 }
4e6112f9 1272 }
3a616aa0 1273 }
9e15114a
DM		 1274}
1275
b47ecc88
AD		 1276sub generate_nfqueue {
1277 my ($options) = @_;
1278
1279 my $action = "";
1280 if($options->{ips}){
1281 $action = "NFQUEUE";
1282 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1283 if(defined($3) && defined($1)) {
1284 $action .= " --queue-balance $1:$3";
1285 }elsif (defined($1)) {
1286 $action .= " --queue-num $1";
1287 }
1288 }
1289 $action .= " --queue-bypass";
1290 }else{
1291 $action = "ACCEPT";
1292 }
1293
1294 return $action;
1295}
1296
da6fc60b
AD		 1297sub ruleset_generate_vm_ipsrules {
1298 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1299
1300 if ($options->{ips} && $direction eq 'IN') {
1301 my $nfqueue = generate_nfqueue($options);
1302
1303 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1304 ruleset_create_chain($ruleset, "PVEFW-IPS");
1305 }
1306
1307 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1308 ruleset_create_chain($ruleset, "$bridge-IPS");
1309 ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1310 }
1311
1312 ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1313 }
1314}
1315
9e15114a 1316sub generate_venet_rules_direction {
fca39c2c 1317 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
9e15114a 1318
5176619e 1319 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM		 1320
1321 my $lc_direction = lc($direction);
1322
1323 my $rules = $vmfw_conf->{rules};
1324
1325 my $options = $vmfw_conf->{options};
1326 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1327
1328 my $chain = "venet0-$vmid-$direction";
1329
1330 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1331
fca39c2c 1332 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
9e15114a
DM		 1333
1334 # implement policy
1335 my $policy;
1336
1337 if ($direction eq 'OUT') {
1338 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1339 } else {
1340 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1341 }
1342
b47ecc88
AD		 1343 my $accept = generate_nfqueue($options);
1344 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1345 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1346
38485daa 1347 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM		 1348 if ($direction eq 'OUT') {
1349 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1350 action => $chain,
1351 source => $ip,
1352 iface_in => 'venet0'});
38485daa
DM		 1353
1354 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1355 action => $chain,
1356 source => $ip,
1357 iface_in => 'venet0'});
eba0fb64
DM		 1358 } else {
1359 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1360 action => $chain,
1361 dest => $ip,
1362 iface_out => 'venet0'});
38485daa
DM		 1363
1364 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1365 action => $chain,
1366 dest => $ip,
1367 iface_out => 'venet0'});
eba0fb64 1368 }
9e15114a
DM		 1369}
1370
1371sub generate_tap_rules_direction {
fca39c2c 1372 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
9e15114a
DM		 1373
1374 my $lc_direction = lc($direction);
1375
1376 my $rules = $vmfw_conf->{rules};
1377
1378 my $options = $vmfw_conf->{options};
1379 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1380
1381 my $tapchain = "$iface-$direction";
1382
1383 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1384
fca39c2c 1385 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
3a616aa0 1386
da6fc60b
AD		 1387 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1388
ccae0b50
DM		 1389 # implement policy
1390 my $policy;
1391
1392 if ($direction eq 'OUT') {
72f63fde 1393 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1394 } else {
72f63fde 1395 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1396 }
1397
b47ecc88
AD		 1398 my $accept = generate_nfqueue($options);
1399 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1400 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1401
3fa83edf 1402 # plug the tap chain to bridge chain
3cc81077
DM		 1403 if ($direction eq 'IN') {
1404 ruleset_insertrule($ruleset, "$bridge-IN",
1405 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1406 } else {
1407 ruleset_insertrule($ruleset, "$bridge-OUT",
1408 "-m physdev --physdev-in $iface -j $tapchain");
1409 }
3a616aa0
AD		 1410}
1411
d18c1e2b 1412sub enable_host_firewall {
fca39c2c 1413 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
0bd5f137 1414
51bae274 1415 # fixme: allow security groups
0bd5f137 1416
92e976b3
DM		 1417 my $options = $hostfw_conf->{options};
1418 my $rules = $hostfw_conf->{rules};
178a63be 1419
3fa83edf 1420 # host inbound firewall
dec84fcd
DM		 1421 my $chain = "PVEFW-HOST-IN";
1422 ruleset_create_chain($ruleset, $chain);
0bd5f137 1423
178a63be
DM		 1424 my $loglevel = get_option_log_level($options, "log_level_in");
1425
4ac863a6
DM		 1426 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1427 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1428 }
1429
fb424a00
DM		 1430 if ($options->{tcpflags}) {
1431 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1432 }
1433
7fab95bc
DM		 1434 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1435 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1436 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1437 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1438 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1439 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1440
23e888f8
DM		 1441 # we use RETURN because we need to check also tap rules
1442 my $accept_action = 'RETURN';
1443
92e976b3
DM		 1444 foreach my $rule (@$rules) {
1445 next if $rule->{type} ne 'in';
ba791b1f 1446 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
0bd5f137
AD		 1447 }
1448
23e888f8 1449 # implement input policy
72f63fde 1450 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1451 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1452
3fa83edf 1453 # host outbound firewall
aadd745e 1454 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1455 ruleset_create_chain($ruleset, $chain);
1456
178a63be
DM		 1457 $loglevel = get_option_log_level($options, "log_level_out");
1458
7fab95bc
DM		 1459 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1460 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1461 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1462 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1463 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1464 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1465
23e888f8
DM		 1466 # we use RETURN because we may want to check other thigs later
1467 $accept_action = 'RETURN';
1468
92e976b3
DM		 1469 foreach my $rule (@$rules) {
1470 next if $rule->{type} ne 'out';
ba791b1f 1471 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
0bd5f137
AD		 1472 }
1473
23e888f8 1474 # implement output policy
72f63fde 1475 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1476 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1477
dec84fcd
DM		 1478 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1479 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1480}
1481
1482sub generate_group_rules {
fca39c2c 1483 my ($ruleset, $cluster_conf, $group) = @_;
c6f5cc88 1484 die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
9d31b418 1485
c6f5cc88 1486 my $rules = $cluster_conf->{groups}->{$group};
6158271d 1487
3fa83edf 1488 my $chain = "GROUP-${group}-IN";
9d31b418 1489
3fa83edf 1490 ruleset_create_chain($ruleset, $chain);
b47ecc88 1491 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1492
92e976b3
DM		 1493 foreach my $rule (@$rules) {
1494 next if $rule->{type} ne 'in';
ba791b1f 1495 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418
AD		 1496 }
1497
3fa83edf 1498 $chain = "GROUP-${group}-OUT";
9d31b418 1499
3fa83edf 1500 ruleset_create_chain($ruleset, $chain);
4e6112f9 1501 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1502
92e976b3
DM		 1503 foreach my $rule (@$rules) {
1504 next if $rule->{type} ne 'out';
1505 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1506 # check also other tap rules later
1507 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1508 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418 1509 }
9d31b418
AD		 1510}
1511
51bae274
DM		 1512my $MAX_NETS = 32;
1513my $valid_netdev_names = {};
1514for (my $i = 0; $i < $MAX_NETS; $i++) {
1515 $valid_netdev_names->{"net$i"} = 1;
1516}
5e1267a5 1517
51bae274
DM		 1518sub parse_fw_rule {
1519 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1520
92e976b3 1521 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1522
11bac5c2 1523 # we can add single line comments to the end of the rule
30c1ae52 1524 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM		 1525
1526 # we can disable a rule when prefixed with '|'
ea9e5116
DM		 1527 my $enable = 1;
1528
1529 $enable = 0 if $line =~ s/^\|//;
51bae274
DM		 1530
1531 my @data = split(/\s+/, $line);
92e976b3 1532 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1533
1534 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1535
1536 if ($need_iface) {
92e976b3 1537 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1538 } else {
92e976b3 1539 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1540 }
1541
92e976b3 1542 die "incomplete rule\n" if ! ($type && $action);
51bae274 1543
961b4928 1544 my $macro;
961b4928 1545
92e976b3
DM		 1546 $type = lc($type);
1547
1548 if ($type eq 'in' || $type eq 'out') {
1549 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1550 # OK
1551 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
e5076eee
DM		 1552 $action = $2;
1553 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1554 die "unknown macro '$1'\n" if !$preferred_name;
1555 $macro = $preferred_name;
92e976b3
DM		 1556 } else {
1557 die "unknown action '$action'\n";
1558 }
1559 } elsif ($type eq 'group') {
1560 die "wrong number of rule elements\n" if scalar(@data) != 3;
1561 die "groups disabled\n" if !$allow_groups;
1562
1563 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1564 } else {
92e976b3 1565 die "unknown rule type '$type'\n";
51bae274
DM		 1566 }
1567
1568 if ($need_iface) {
1569 $iface = undef if $iface && $iface eq '-';
51bae274
DM		 1570 }
1571
1572 $proto = undef if $proto && $proto eq '-';
54cd19a8 1573 pve_fw_verify_protocol_spec($proto) if $proto;
51bae274
DM		 1574
1575 $source = undef if $source && $source eq '-';
1576 $dest = undef if $dest && $dest eq '-';
1577
1578 $dport = undef if $dport && $dport eq '-';
1579 $sport = undef if $sport && $sport eq '-';
1580
e5076eee
DM		 1581 parse_port_name_number_or_range($dport) if defined($dport);
1582 parse_port_name_number_or_range($sport) if defined($sport);
ba791b1f
AD		 1583
1584 parse_address_list($source) if $source && $source !~ m/^(\+)(\S+)$/;
1585 parse_address_list($dest) if $dest && $dest !~ m/^(\+)(\S+)$/;
51bae274 1586
e5076eee 1587 return {
92e976b3 1588 type => $type,
ea9e5116 1589 enable => $enable,
11bac5c2 1590 comment => $comment,
51bae274 1591 action => $action,
e5076eee 1592 macro => $macro,
51bae274
DM		 1593 iface => $iface,
1594 source => $source,
1595 dest => $dest,
51bae274
DM		 1596 proto => $proto,
1597 dport => $dport,
1598 sport => $sport,
51bae274
DM		 1599 };
1600}
1601
2d404ffc 1602sub parse_vmfw_option {
85c6eaed
DM		 1603 my ($line) = @_;
1604
1605 my ($opt, $value);
1606
178a63be
DM		 1607 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1608
b47ecc88 1609 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1610 $opt = lc($1);
1611 $value = int($2);
178a63be
DM		 1612 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1613 $opt = lc($1);
1614 $value = $2 ? lc($3) : '';
72f63fde 1615 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1616 $opt = lc($1);
1617 $value = uc($3);
b47ecc88
AD		 1618 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1619 $opt = lc($1);
1620 $value = $2;
9c6b6efd 1621 } else {
85c6eaed
DM		 1622 chomp $line;
1623 die "can't parse option '$line'\n"
1624 }
1625
1626 return ($opt, $value);
1627}
1628
2d404ffc
DM		 1629sub parse_hostfw_option {
1630 my ($line) = @_;
1631
1632 my ($opt, $value);
1633
1634 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1635
cc10e5d7 1636 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1637 $opt = lc($1);
1638 $value = int($2);
178a63be 1639 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1640 $opt = lc($1);
1641 $value = $2 ? lc($3) : '';
72f63fde 1642 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1643 $opt = lc($1);
1644 $value = uc($3);
490cdead
DM		 1645 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1646 $opt = lc($1);
1647 $value = int($2);
2d404ffc
DM		 1648 } else {
1649 chomp $line;
1650 die "can't parse option '$line'\n"
1651 }
1652
1653 return ($opt, $value);
1654}
1655
c6f5cc88
DM		 1656sub parse_clusterfw_option {
1657 my ($line) = @_;
1658
1659 my ($opt, $value);
1660
1661 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1662 $opt = lc($1);
1663 $value = int($2);
1664 } else {
1665 chomp $line;
1666 die "can't parse option '$line'\n"
1667 }
1668
1669 return ($opt, $value);
1670}
1671
51bae274
DM		 1672sub parse_vm_fw_rules {
1673 my ($filename, $fh) = @_;
1674
92e976b3 1675 my $res = { rules => [], options => {}};
51bae274
DM		 1676
1677 my $section;
1678
e7b35711
DM		 1679 my $digest = Digest::SHA->new('sha1');
1680
5e1267a5 1681 while (defined(my $line = <$fh>)) {
e7b35711
DM		 1682 $digest->add($line);
1683
5e1267a5
DM		 1684 next if $line =~ m/^#/;
1685 next if $line =~ m/^\s*$/;
1686
961b4928
DM		 1687 my $linenr = $fh->input_line_number();
1688 my $prefix = "$filename (line $linenr)";
1689
85c6eaed 1690 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1691 $section = lc($1);
85c6eaed 1692 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1693 next;
1694 }
51bae274 1695 if (!$section) {
961b4928 1696 warn "$prefix: skip line - no section";
5e1267a5
DM		 1697 next;
1698 }
1699
85c6eaed
DM		 1700 next if !$res->{$section}; # skip undefined section
1701
1702 if ($section eq 'options') {
6158271d 1703 eval {
2d404ffc 1704 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1705 $res->{options}->{$opt} = $value;
1706 };
1707 warn "$prefix: $@" if $@;
1708 next;
1709 }
1710
e5076eee
DM		 1711 my $rule;
1712 eval { $rule = parse_fw_rule($line, 1, 1); };
51bae274 1713 if (my $err = $@) {
961b4928 1714 warn "$prefix: $err";
5e1267a5
DM		 1715 next;
1716 }
1717
e5076eee 1718 push @{$res->{$section}}, $rule;
51bae274
DM		 1719 }
1720
e7b35711
DM		 1721 $res->{digest} = $digest->b64digest;
1722
51bae274
DM		 1723 return $res;
1724}
1725
1726sub parse_host_fw_rules {
1727 my ($filename, $fh) = @_;
1728
92e976b3 1729 my $res = { rules => [], options => {}};
51bae274
DM		 1730
1731 my $section;
1732
8b27beb9
DM		 1733 my $digest = Digest::SHA->new('sha1');
1734
51bae274 1735 while (defined(my $line = <$fh>)) {
8b27beb9
DM		 1736 $digest->add($line);
1737
51bae274
DM		 1738 next if $line =~ m/^#/;
1739 next if $line =~ m/^\s*$/;
1740
961b4928
DM		 1741 my $linenr = $fh->input_line_number();
1742 my $prefix = "$filename (line $linenr)";
1743
2d404ffc 1744 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1745 $section = lc($1);
2d404ffc 1746 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1747 next;
1748 }
51bae274 1749 if (!$section) {
961b4928 1750 warn "$prefix: skip line - no section";
5e1267a5
DM		 1751 next;
1752 }
1753
2d404ffc
DM		 1754 next if !$res->{$section}; # skip undefined section
1755
1756 if ($section eq 'options') {
1757 eval {
2d404ffc
DM		 1758 my ($opt, $value) = parse_hostfw_option($line);
1759 $res->{options}->{$opt} = $value;
1760 };
1761 warn "$prefix: $@" if $@;
1762 next;
1763 }
1764
e5076eee
DM		 1765 my $rule;
1766 eval { $rule = parse_fw_rule($line, 1, 1); };
ecbea048 1767 if (my $err = $@) {
961b4928 1768 warn "$prefix: $err";
ecbea048 1769 next;
ecbea048 1770 }
e5076eee
DM		 1771
1772 push @{$res->{$section}}, $rule;
51bae274 1773 }
ecbea048 1774
8b27beb9
DM		 1775 $res->{digest} = $digest->b64digest;
1776
51bae274
DM		 1777 return $res;
1778}
4cdbb3b7 1779
c6f5cc88 1780sub parse_cluster_fw_rules {
51bae274 1781 my ($filename, $fh) = @_;
5e1267a5 1782
51bae274
DM		 1783 my $section;
1784 my $group;
1785
c4a2e5ae 1786 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
6158271d 1787
d1c53b3e
DM		 1788 my $digest = Digest::SHA->new('sha1');
1789
51bae274 1790 while (defined(my $line = <$fh>)) {
d1c53b3e
DM		 1791 $digest->add($line);
1792
51bae274
DM		 1793 next if $line =~ m/^#/;
1794 next if $line =~ m/^\s*$/;
1795
961b4928
DM		 1796 my $linenr = $fh->input_line_number();
1797 my $prefix = "$filename (line $linenr)";
1798
c6f5cc88
DM		 1799 if ($line =~ m/^\[options\]$/i) {
1800 $section = 'options';
1801 next;
1802 }
1803
92e976b3 1804 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
c6f5cc88 1805 $section = 'groups';
92e976b3 1806 $group = lc($1);
51bae274
DM		 1807 next;
1808 }
34cdedfa 1809
c6f5cc88
DM		 1810 if ($line =~ m/^\[rules\]$/i) {
1811 $section = 'rules';
1812 next;
1813 }
1814
34cdedfa
AD		 1815 if ($line =~ m/^\[netgroup\s+(\S+)\]\s*$/i) {
1816 $section = 'ipset';
1817 $group = lc($1);
34cdedfa
AD		 1818 next;
1819 }
1820
c6f5cc88 1821 if (!$section) {
961b4928 1822 warn "$prefix: skip line - no section";
51bae274
DM		 1823 next;
1824 }
1825
c6f5cc88
DM		 1826 if ($section eq 'options') {
1827 eval {
1828 my ($opt, $value) = parse_clusterfw_option($line);
1829 $res->{options}->{$opt} = $value;
1830 };
1831 warn "$prefix: $@" if $@;
1832 } elsif ($section eq 'rules') {
1833 my $rule;
1834 eval { $rule = parse_fw_rule($line, 1, 1); };
1835 if (my $err = $@) {
1836 warn "$prefix: $err";
1837 next;
1838 }
1839 push @{$res->{$section}}, $rule;
1840 } elsif ($section eq 'groups') {
34cdedfa
AD		 1841 my $rule;
1842 eval { $rule = parse_fw_rule($line, 0, 0); };
1843 if (my $err = $@) {
1844 warn "$prefix: $err";
1845 next;
1846 }
3f95d14a 1847 push @{$res->{$section}->{$group}}, $rule;
3f95d14a
DM		 1848 } elsif ($section eq 'ipset') {
1849 chomp $line;
2a052ee3
AD		 1850 $line =~ m/^(\!)?(\s)?((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1851 my $nomatch = $1;
1852 my $ip = $3;
1853
1854 if(!$ip){
34cdedfa
AD		 1855 warn "$prefix: $line is not an valid ip address";
1856 next;
1857 }
2a052ee3
AD		 1858 if (!Net::IP->new($ip)) {
1859 warn "$prefix: $line is not an valid ip address";
1860 next;
1861 }
1862 $ip .= " nomatch" if $nomatch;
1863
1864 push @{$res->{$section}->{$group}}, $ip;
51bae274 1865 }
5e1267a5
DM		 1866 }
1867
d1c53b3e 1868 $res->{digest} = $digest->b64digest;
5e1267a5
DM		 1869 return $res;
1870}
1871
06320eb0
DM		 1872sub run_locked {
1873 my ($code, @param) = @_;
1874
1875 my $timeout = 10;
1876
1877 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1878
1879 die $@ if $@;
1880
1881 return $res;
1882}
1883
5e1267a5
DM		 1884sub read_local_vm_config {
1885
1886 my $openvz = {};
5e1267a5
DM		 1887 my $qemu = {};
1888
c8301d63 1889 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1890
c8301d63
DM		 1891 my $vmlist = PVE::Cluster::get_vmlist();
1892 return $vmdata if !$vmlist || !$vmlist->{ids};
1893 my $ids = $vmlist->{ids};
1894
1895 foreach my $vmid (keys %$ids) {
1896 next if !$vmid; # skip VE0
1897 my $d = $ids->{$vmid};
1898 next if !$d->{node} || $d->{node} ne $nodename;
1899 next if !$d->{type};
1900 if ($d->{type} eq 'openvz') {
d9fee004
DM		 1901 if ($have_pve_manager) {
1902 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1903 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1904 $openvz->{$vmid} = $conf;
1905 }
c8301d63
DM		 1906 }
1907 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM		 1908 if ($have_qemu_server) {
1909 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1910 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1911 $qemu->{$vmid} = $conf;
1912 }
c8301d63 1913 }
5e1267a5
DM		 1914 }
1915 }
d9fee004 1916
5e1267a5
DM		 1917 return $vmdata;
1918};
1919
e7b35711
DM		 1920sub load_vmfw_conf {
1921 my ($vmid) = @_;
1922
1923 my $vmfw_conf = {};
1924
1925 my $filename = "/etc/pve/firewall/$vmid.fw";
1926 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1927 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1928 }
1929
1930 return $vmfw_conf;
1931}
1932
464f933e
DM		 1933my $format_rules = sub {
1934 my ($rules, $need_iface) = @_;
1935
1936 my $raw = '';
1937
1938 foreach my $rule (@$rules) {
1939 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
1940 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
1941 $raw .= uc($rule->{type});
1942 $raw .= " " . $rule->{action};
1943 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
1944 $raw .= " " . ($rule->{source} || '-');
1945 $raw .= " " . ($rule->{dest} || '-');
1946 $raw .= " " . ($rule->{proto} || '-');
1947 $raw .= " " . ($rule->{dport} || '-');
1948 $raw .= " " . ($rule->{sport} || '-');
1949 $raw .= " # " . encode('utf8', $rule->{comment})
1950 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
1951 $raw .= "\n";
1952 } else {
1953 die "implement me '$rule->{type}'";
1954 }
1955 }
1956
1957 return $raw;
1958};
1959
1960my $format_options = sub {
68c90e21
DM		 1961 my ($options) = @_;
1962
1963 my $raw = '';
464f933e
DM		 1964
1965 $raw .= "[OPTIONS]\n\n";
1966 foreach my $opt (keys %$options) {
1967 $raw .= "$opt: $options->{$opt}\n";
1968 }
1969 $raw .= "\n";
68c90e21
DM		 1970
1971 return $raw;
464f933e
DM		 1972};
1973
1974sub save_vmfw_conf {
1975 my ($vmid, $vmfw_conf) = @_;
1976
1977 my $raw = '';
1978
1979 my $options = $vmfw_conf->{options};
68c90e21 1980 $raw .= &$format_options($options) if scalar(keys %$options);
464f933e
DM		 1981
1982 my $rules = $vmfw_conf->{rules};
1983 if (scalar(@$rules)) {
1984 $raw .= "[RULES]\n\n";
1985 $raw .= &$format_rules($rules, 1);
1986 $raw .= "\n";
1987 }
1988
1989 my $filename = "/etc/pve/firewall/$vmid.fw";
1990 PVE::Tools::file_set_contents($filename, $raw);
1991}
1992
6fc63ffd 1993sub read_vm_firewall_configs {
5e1267a5 1994 my ($vmdata) = @_;
6fc63ffd 1995 my $vmfw_configs = {};
c8301d63 1996
5e1267a5 1997 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
e7b35711
DM		 1998 my $vmfw_conf = load_vmfw_conf($vmid);
1999 next if !$vmfw_conf->{options}; # skip if file does not exists
2000 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM		 2001 }
2002
6fc63ffd 2003 return $vmfw_configs;
5e1267a5
DM		 2004}
2005
2d404ffc
DM		 2006sub get_option_log_level {
2007 my ($options, $k) = @_;
2008
2009 my $v = $options->{$k};
178a63be 2010 $v = $default_log_level if !defined($v);
2d404ffc
DM		 2011
2012 return undef if $v eq '' || $v eq 'nolog';
2013
2014 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2015
2016 return $v if ($v >= 0) && ($v <= 7);
2017
2018 warn "unknown log level ($k = '$v')\n";
2019
2020 return undef;
2021}
2022
d8f2505e 2023sub generate_std_chains {
2d404ffc
DM		 2024 my ($ruleset, $options) = @_;
2025
2026 my $loglevel = get_option_log_level($options, 'smurf_log_level');
2027
2028 # same as shorewall smurflog.
782c4cde
DM		 2029 my $chain = 'PVEFW-smurflog';
2030
2031 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2032 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 2033
2034 # same as shorewall logflags action.
2035 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM		 2036 $chain = 'PVEFW-logflags';
2037 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2038 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2039 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 2040
2041 foreach my $chain (keys %$pve_std_chains) {
2042 ruleset_create_chain($ruleset, $chain);
2043 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2044 if (ref($rule)) {
2045 ruleset_generate_rule($ruleset, $chain, $rule);
2046 } else {
2047 ruleset_addrule($ruleset, $chain, $rule);
2048 }
2049 }
2050 }
2051}
2052
34cdedfa 2053sub generate_ipset_chains {
dd7a13fd 2054 my ($ipset_ruleset, $fw_conf) = @_;
34cdedfa 2055
dd7a13fd
DM		 2056 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2057 generate_ipset($ipset_ruleset, $ipset, $fw_conf->{ipset}->{$ipset});
34cdedfa
AD		 2058 }
2059}
2060
2061sub generate_ipset {
2062 my ($ipset_ruleset, $name, $options) = @_;
2063
dd7a13fd
DM		 2064 my $hashsize = scalar(@$options);
2065 if ($hashsize <= 64) {
2a052ee3 2066 $hashsize = 64;
dd7a13fd 2067 } else {
2a052ee3
AD		 2068 $hashsize = round_powerof2($hashsize);
2069 }
2070
dd7a13fd 2071 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
34cdedfa 2072
dd7a13fd 2073 foreach my $ip (@$options) {
34cdedfa
AD		 2074 push @{$ipset_ruleset->{$name}}, "add $name $ip";
2075 }
2a052ee3
AD		 2076}
2077
2078sub round_powerof2 {
dd7a13fd 2079 my ($int) = @_;
2a052ee3 2080
dd7a13fd
DM		 2081 $int--;
2082 $int |= $int >> $_ foreach (1,2,4,8,16);
2083 return ++$int;
34cdedfa
AD		 2084}
2085
6b9f68a2
DM		 2086sub save_pvefw_status {
2087 my ($status) = @_;
2088
2089 die "unknown status '$status' - internal error"
2090 if $status !~ m/^(stopped|active)$/;
2091
2092 mkdir dirname($pve_fw_status_filename);
2093 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2094}
2095
2096sub read_pvefw_status {
2097
2098 my $status = 'unknown';
2099
2100 return 'stopped' if ! -f $pve_fw_status_filename;
2101
2102 eval {
2103 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2104 };
2105 warn $@ if $@;
2106
2107 return $status;
2108}
2109
530c005e
DM		 2110# fixme: move to pve-common PVE::ProcFSTools
2111sub read_proc_net_route {
2112 my $filename = "/proc/net/route";
2113
2114 my $res = {};
2115
2116 my $fh = IO::File->new ($filename, "r");
2117 return $res if !$fh;
2118
2119 my $int_to_quad = sub {
2120 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2121 };
2122
2123 while (defined(my $line = <$fh>)) {
2124 next if $line =~/^Iface\s+Destination/; # skip head
2125 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2126 push @{$res->{$iface}}, {
2127 dest => &$int_to_quad(hex($dest)),
2128 gateway => &$int_to_quad(hex($gateway)),
2129 mask => &$int_to_quad(hex($mask)),
2130 metric => $metric,
2131 mtu => $mtu,
2132 };
2133 }
2134
2135 return $res;
2136}
2137
fca39c2c 2138sub load_clusterfw_conf {
530c005e 2139
fca39c2c
DM		 2140 my $cluster_conf = {};
2141 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
c6f5cc88 2142 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
51bae274 2143 }
5e1267a5 2144
fca39c2c 2145 return $cluster_conf;
e5d76bde
DM		 2146}
2147
fca39c2c
DM		 2148sub save_clusterfw_conf {
2149 my ($cluster_conf) = @_;
9c7e0858
DM		 2150
2151 my $raw = '';
9c7e0858 2152
c6f5cc88 2153 my $options = $cluster_conf->{options};
68c90e21 2154 $raw .= &$format_options($options) if scalar(keys %$options);
9c7e0858 2155
c6f5cc88
DM		 2156 # fixme: save ipset
2157
2158 my $rules = $cluster_conf->{rules};
2159 if (scalar(@$rules)) {
2160 $raw .= "[RULES]\n\n";
63c91681 2161 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 2162 $raw .= "\n";
2163 }
2164
2165 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2166 my $rules = $cluster_conf->{groups}->{$group};
2167 $raw .= "[group $group]\n\n";
63c91681 2168 $raw .= &$format_rules($rules, 0);
9c7e0858
DM		 2169 $raw .= "\n";
2170 }
2171
fca39c2c 2172 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM		 2173}
2174
8b27beb9
DM		 2175sub load_hostfw_conf {
2176
2177 my $hostfw_conf = {};
63c91681
DM		 2178 if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2179 $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
8b27beb9
DM		 2180 }
2181 return $hostfw_conf;
2182}
2183
63c91681
DM		 2184sub save_hostfw_conf {
2185 my ($hostfw_conf) = @_;
2186
2187 my $raw = '';
2188
2189 my $options = $hostfw_conf->{options};
68c90e21 2190 $raw .= &$format_options($options) if scalar(keys %$options);
63c91681
DM		 2191
2192 my $rules = $hostfw_conf->{rules};
2193 if (scalar(@$rules)) {
2194 $raw .= "[RULES]\n\n";
2195 $raw .= &$format_rules($rules, 1);
2196 $raw .= "\n";
2197 }
2198
2199 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2200}
2201
e5d76bde
DM		 2202sub compile {
2203 my $vmdata = read_local_vm_config();
2204 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2205
2206 my $routing_table = read_proc_net_route();
2207
fca39c2c 2208 my $cluster_conf = load_clusterfw_conf();
e5d76bde 2209
34cdedfa 2210 my $ipset_ruleset = {};
fca39c2c 2211 generate_ipset_chains($ipset_ruleset, $cluster_conf);
34cdedfa 2212
3fa83edf
DM		 2213 my $ruleset = {};
2214
dec84fcd
DM		 2215 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2216 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2217
fadb13dd 2218 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 2219
8b27beb9
DM		 2220 my $hostfw_conf = load_hostfw_conf();
2221 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2222
92e976b3 2223 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2224
6d2ab017 2225 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2226
fca39c2c 2227 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
3fa83edf 2228
6158271d 2229 # generate firewall rules for QEMU VMs
3fa83edf
DM		 2230 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2231 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 2232 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 2233 next if !$vmfw_conf;
2234 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 2235
2236 foreach my $netid (keys %$conf) {
2237 next if $netid !~ m/^net(\d+)$/;
2238 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2239 next if !$net;
2240 my $iface = "tap${vmid}i$1";
5e1267a5 2241
3fa83edf
DM		 2242 my $bridge = $net->{bridge};
2243 next if !$bridge; # fixme: ?
2244
2245 $bridge .= "v$net->{tag}" if $net->{tag};
2246
530c005e 2247 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 2248
c29f55c9 2249 my $macaddr = $net->{macaddr};
fca39c2c 2250 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2251 $vmfw_conf, $vmid, $bridge, 'IN');
fca39c2c 2252 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2253 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM		 2254 }
2255 }
c8301d63
DM		 2256
2257 # generate firewall rules for OpenVZ containers
2258 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2259 my $conf = $vmdata->{openvz}->{$vmid};
2260
2261 my $vmfw_conf = $vmfw_configs->{$vmid};
2262 next if !$vmfw_conf;
2263 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2264
2265 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2266 my $ip = $conf->{ip_address}->{value};
fca39c2c
DM		 2267 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2268 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 2269 }
2270
2271 if ($conf->{netif} && $conf->{netif}->{value}) {
2272 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 2273 foreach my $netid (keys %$netif) {
2274 my $d = $netif->{$netid};
2275 my $bridge = $d->{bridge};
2276 if (!$bridge) {
2277 warn "no bridge device for CT $vmid iface '$netid'\n";
2278 next; # fixme?
2279 }
530c005e
DM		 2280
2281 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2282
12d0f130 2283 my $macaddr = $d->{mac};
c8301d63 2284 my $iface = $d->{host_ifname};
fca39c2c 2285 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2286 $vmfw_conf, $vmid, $bridge, 'IN');
fca39c2c 2287 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2288 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM		 2289 }
2290 }
2291 }
c0413e35 2292
cc10e5d7 2293 if($hostfw_options->{optimize}){
da6fc60b 2294
e9d9a73e 2295 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
da6fc60b 2296 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
cc10e5d7
AD		 2297 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2298 }
2299
eba0fb64
DM		 2300 # fixme: what log level should we use here?
2301 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2302
c98c037d
DM		 2303 # fixme: should we really block inter-bridge traffic?
2304
2305 # always allow traffic from containers?
2306 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2307
eba0fb64
DM		 2308 # disable interbridge routing
2309 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2310 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
782c4cde
DM		 2311 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2312 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
eba0fb64
DM		 2313 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2314 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2315
34cdedfa 2316 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
3fa83edf
DM		 2317}
2318
2319sub get_ruleset_status {
4bd0a9c4 2320 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM		 2321
2322 my $statushash = {};
2323
2324 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 2325 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 2326
3fa83edf
DM		 2327 $statushash->{$chain}->{sig} = $sig;
2328
2329 my $oldsig = $active_chains->{$chain};
2330 if (!defined($oldsig)) {
2331 $statushash->{$chain}->{action} = 'create';
2332 } else {
2333 if ($oldsig eq $sig) {
2334 $statushash->{$chain}->{action} = 'exists';
2335 } else {
2336 $statushash->{$chain}->{action} = 'update';
2337 }
2338 }
2339 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2340 foreach my $cmd (@{$ruleset->{$chain}}) {
2341 print "\t$cmd\n" if $verbose;
2342 }
2343 }
2344
2345 foreach my $chain (sort keys %$active_chains) {
2346 if (!defined($ruleset->{$chain})) {
2347 my $sig = $active_chains->{$chain};
2348 $statushash->{$chain}->{action} = 'delete';
2349 $statushash->{$chain}->{sig} = $sig;
2350 print "delete $chain ($sig)\n" if $verbose;
2351 }
6158271d 2352 }
2a052ee3 2353
3fa83edf
DM		 2354 return $statushash;
2355}
2356
3fa83edf
DM		 2357sub print_sig_rule {
2358 my ($chain, $sig) = @_;
2359
09d5f68e
DM		 2360 # We just use this to store a SHA1 checksum used to detect changes
2361 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 2362}
2363
df7cb349 2364sub get_ruleset_cmdlist {
a84f4d96 2365 my ($ruleset, $verbose) = @_;
3fa83edf 2366
3fa83edf 2367 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
4bd0a9c4
DM		 2368
2369 my ($active_chains, $hooks) = iptables_get_chains();
2370 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM		 2371
2372 # create missing chains first
2373 foreach my $chain (sort keys %$ruleset) {
2374 my $stat = $statushash->{$chain};
2375 die "internal error" if !$stat;
2376 next if $stat->{action} ne 'create';
886aba9c 2377
3fa83edf
DM		 2378 $cmdlist .= ":$chain - [0:0]\n";
2379 }
2380
4bd0a9c4
DM		 2381 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2382 if (!$hooks->{$h}) {
2383 $cmdlist .= "-A $h -j PVEFW-$h\n";
2384 }
3fa83edf
DM		 2385 }
2386
2387 foreach my $chain (sort keys %$ruleset) {
2388 my $stat = $statushash->{$chain};
2389 die "internal error" if !$stat;
2390
2391 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2392 $cmdlist .= "-F $chain\n";
2393 foreach my $cmd (@{$ruleset->{$chain}}) {
2394 $cmdlist .= "$cmd\n";
2395 }
2396 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2397 } elsif ($stat->{action} eq 'delete') {
f5d28682 2398 die "internal error"; # this should not happen
3fa83edf
DM		 2399 } elsif ($stat->{action} eq 'exists') {
2400 # do nothing
2401 } else {
2402 die "internal error - unknown status '$stat->{action}'";
2403 }
2404 }
2405
f5d28682
DM		 2406 foreach my $chain (keys %$statushash) {
2407 next if $statushash->{$chain}->{action} ne 'delete';
2408 $cmdlist .= "-F $chain\n";
2409 }
2410 foreach my $chain (keys %$statushash) {
2411 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 2412 next if $chain eq 'PVEFW-INPUT';
2413 next if $chain eq 'PVEFW-OUTPUT';
2414 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 2415 $cmdlist .= "-X $chain\n";
2416 }
2417
3f95d14a 2418 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 2419
3fa83edf
DM		 2420 $cmdlist .= "COMMIT\n";
2421
3f95d14a 2422 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 2423}
2424
34cdedfa 2425sub get_ipset_cmdlist {
dd7a13fd 2426 my ($ruleset, $verbose) = @_;
34cdedfa
AD		 2427
2428 my $cmdlist = "";
2429
dd7a13fd
DM		 2430 my $delete_cmdlist = "";
2431
4bd0a9c4
DM		 2432 my $active_chains = ipset_get_chains();
2433 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 2434
dd7a13fd
DM		 2435 foreach my $chain (sort keys %$ruleset) {
2436 my $stat = $statushash->{$chain};
2437 die "internal error" if !$stat;
2a052ee3 2438
dd7a13fd
DM		 2439 if ($stat->{action} eq 'create') {
2440 foreach my $cmd (@{$ruleset->{$chain}}) {
34cdedfa
AD		 2441 $cmdlist .= "$cmd\n";
2442 }
dd7a13fd 2443 }
34cdedfa 2444
dd7a13fd
DM		 2445 if ($stat->{action} eq 'update') {
2446 my $chain_swap = $chain."_swap";
2447
2448 foreach my $cmd (@{$ruleset->{$chain}}) {
2449 $cmd =~ s/$chain/$chain_swap/;
2450 $cmdlist .= "$cmd\n";
34cdedfa 2451 }
dd7a13fd
DM		 2452 $cmdlist .= "swap $chain_swap $chain\n";
2453 $cmdlist .= "flush $chain_swap\n";
2454 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 2455 }
34cdedfa 2456
dd7a13fd 2457 }
3f95d14a 2458
dd7a13fd
DM		 2459 foreach my $chain (keys %$statushash) {
2460 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 2461
dd7a13fd
DM		 2462 $delete_cmdlist .= "flush $chain\n";
2463 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 2464 }
2465
dd7a13fd
DM		 2466 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2467
2468 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 2469}
2470
6b9f68a2 2471sub apply_ruleset {
34cdedfa 2472 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM		 2473
2474 enable_bridge_firewall();
2475
edb75ba9
DM		 2476 update_nf_conntrack_max($hostfw_conf);
2477
81a0bf43
DM		 2478 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2479 get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
6b9f68a2 2480
81a0bf43 2481 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2a052ee3 2482
81a0bf43
DM		 2483 if ($verbose) {
2484 if ($ipset_changes) {
2485 print "ipset changes:\n";
2486 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2487 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2488 }
3f95d14a 2489
81a0bf43
DM		 2490 if ($changes) {
2491 print "iptables changes:\n";
2492 print $cmdlist;
2493 }
2494 }
3fa83edf 2495
2a052ee3 2496 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 2497
3fa83edf
DM		 2498 iptables_restore_cmdlist($cmdlist);
2499
dd7a13fd 2500 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 2501
6158271d 2502 # test: re-read status and check if everything is up to date
4bd0a9c4 2503 my $active_chains = iptables_get_chains();
81a0bf43 2504 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3fa83edf
DM		 2505
2506 my $errors;
2507 foreach my $chain (sort keys %$ruleset) {
2508 my $stat = $statushash->{$chain};
2509 if ($stat->{action} ne 'exists') {
2510 warn "unable to update chain '$chain'\n";
2511 $errors = 1;
2512 }
2513 }
b6360c3f 2514
3fa83edf 2515 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 2516}
2517
490cdead
DM		 2518sub update_nf_conntrack_max {
2519 my ($hostfw_conf) = @_;
2520
2521 my $max = 65536; # reasonable default
2522
2523 my $options = $hostfw_conf->{options} || {};
2524
2525 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2526 $max = $options->{nf_conntrack_max};
2527 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2528 }
2529
2530 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2531 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2532
2533 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2534
2535 if ($current != $max) {
2536 my $hashsize = int($max/4);
2537 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2538 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2539 }
2540}
2541
c4a2e5ae
DM		 2542sub remove_pvefw_chains {
2543
2544 my ($chash, $hooks) = iptables_get_chains();
2545 my $cmdlist = "*filter\n";
2546
2547 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2548 if ($hooks->{$h}) {
2549 $cmdlist .= "-D $h -j PVEFW-$h\n";
2550 }
2551 }
2552
2553 foreach my $chain (keys %$chash) {
2554 $cmdlist .= "-F $chain\n";
2555 }
2556
2557 foreach my $chain (keys %$chash) {
2558 $cmdlist .= "-X $chain\n";
2559 }
2560 $cmdlist .= "COMMIT\n";
2561
2562 iptables_restore_cmdlist($cmdlist);
2563}
2564
6b9f68a2
DM		 2565sub update {
2566 my ($start, $verbose) = @_;
2567
2568 my $code = sub {
2569 my $status = read_pvefw_status();
2570
3f95d14a 2571 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
490cdead 2572
6b9f68a2
DM		 2573 if ($start || $status eq 'active') {
2574
2575 save_pvefw_status('active') if ($status ne 'active');
2576
34cdedfa 2577 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM		 2578 } else {
2579 print "Firewall not active (status = $status)\n" if $verbose;
2580 }
2581 };
2582
2583 run_locked($code);
2584}
2585
2586
b6360c3f 25871;
Firewall test scripts