]> git.proxmox.com Git - pve-firewall.git/blame - src/PVE/Firewall.pm
projects / pve-firewall.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
new method iptables_chain_digest() to compute digest
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
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
fca39c2c
DM		 19my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
20
d9fee004
DM		 21# dynamically include PVE::QemuServer and PVE::OpenVZ
22# to avoid dependency problems
23my $have_qemu_server;
24eval {
25 require PVE::QemuServer;
26 $have_qemu_server = 1;
27};
28
29my $have_pve_manager;
30eval {
31 require PVE::OpenVZ;
32 $have_pve_manager = 1;
33};
34
5e1267a5 35use Data::Dumper;
b6360c3f 36
c8301d63
DM		 37my $nodename = PVE::INotify::nodename();
38
06320eb0 39my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 40my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 41
2d404ffc
DM		 42my $default_log_level = 'info';
43
44my $log_level_hash = {
45 debug => 7,
46 info => 6,
47 notice => 5,
48 warning => 4,
49 err => 3,
50 crit => 2,
51 alert => 1,
52 emerg => 0,
53};
54
857f62c8 55# imported/converted from: /usr/share/shorewall/macro.*
961b4928 56my $pve_fw_macros = {
857f62c8
DM		 57 'Amanda' => [
58 { action => 'PARAM', proto => 'udp', dport => '10080' },
59 { action => 'PARAM', proto => 'tcp', dport => '10080' },
60 ],
61 'Auth' => [
62 { action => 'PARAM', proto => 'tcp', dport => '113' },
63 ],
64 'BGP' => [
65 { action => 'PARAM', proto => 'tcp', dport => '179' },
66 ],
67 'BitTorrent' => [
961b4928 68 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 69 { action => 'PARAM', proto => 'udp', dport => '6881' },
70 ],
71 'BitTorrent32' => [
72 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
73 { action => 'PARAM', proto => 'udp', dport => '6881' },
74 ],
75 'CVS' => [
76 { action => 'PARAM', proto => 'tcp', dport => '2401' },
77 ],
78 'Citrix' => [
79 { action => 'PARAM', proto => 'tcp', dport => '1494' },
80 { action => 'PARAM', proto => 'udp', dport => '1604' },
81 { action => 'PARAM', proto => 'tcp', dport => '2598' },
82 ],
83 'DAAP' => [
84 { action => 'PARAM', proto => 'tcp', dport => '3689' },
85 { action => 'PARAM', proto => 'udp', dport => '3689' },
86 ],
87 'DCC' => [
88 { action => 'PARAM', proto => 'tcp', dport => '6277' },
89 ],
90 'DHCPfwd' => [
91 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
92 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
93 ],
94 'DNS' => [
95 { action => 'PARAM', proto => 'udp', dport => '53' },
96 { action => 'PARAM', proto => 'tcp', dport => '53' },
97 ],
98 'Distcc' => [
99 { action => 'PARAM', proto => 'tcp', dport => '3632' },
100 ],
101 'Edonkey' => [
102 { action => 'PARAM', proto => 'tcp', dport => '4662' },
103 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 104 ],
857f62c8
DM		 105 'FTP' => [
106 { action => 'PARAM', proto => 'tcp', dport => '21' },
107 ],
108 'Finger' => [
109 { action => 'PARAM', proto => 'tcp', dport => '79' },
110 ],
111 'GNUnet' => [
112 { action => 'PARAM', proto => 'tcp', dport => '2086' },
113 { action => 'PARAM', proto => 'udp', dport => '2086' },
114 { action => 'PARAM', proto => 'tcp', dport => '1080' },
115 { action => 'PARAM', proto => 'udp', dport => '1080' },
116 ],
117 'GRE' => [
118 { action => 'PARAM', proto => '47' },
119 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
120 ],
121 'Git' => [
122 { action => 'PARAM', proto => 'tcp', dport => '9418' },
123 ],
124 'Gnutella' => [
125 { action => 'PARAM', proto => 'tcp', dport => '6346' },
126 { action => 'PARAM', proto => 'udp', dport => '6346' },
127 ],
128 'HKP' => [
129 { action => 'PARAM', proto => 'tcp', dport => '11371' },
130 ],
131 'HTTP' => [
961b4928
DM		 132 { action => 'PARAM', proto => 'tcp', dport => '80' },
133 ],
857f62c8
DM		 134 'HTTPS' => [
135 { action => 'PARAM', proto => 'tcp', dport => '443' },
136 ],
137 'ICPV2' => [
138 { action => 'PARAM', proto => 'udp', dport => '3130' },
139 ],
140 'ICQ' => [
141 { action => 'PARAM', proto => 'tcp', dport => '5190' },
142 ],
143 'IMAP' => [
144 { action => 'PARAM', proto => 'tcp', dport => '143' },
145 ],
146 'IMAPS' => [
147 { action => 'PARAM', proto => 'tcp', dport => '993' },
148 ],
149 'IPIP' => [
150 { action => 'PARAM', proto => '94' },
151 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
152 ],
153 'IPP' => [
154 { action => 'PARAM', proto => 'tcp', dport => '631' },
155 ],
156 'IPPbrd' => [
157 { action => 'PARAM', proto => 'udp', dport => '631' },
158 ],
159 'IPPserver' => [
160 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
161 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
162 ],
163 'IPsec' => [
164 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
165 { action => 'PARAM', proto => '50' },
166 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
167 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
168 ],
169 'IPsecah' => [
170 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
171 { action => 'PARAM', proto => '51' },
172 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
173 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
174 ],
175 'IPsecnat' => [
176 { action => 'PARAM', proto => 'udp', dport => '500' },
177 { action => 'PARAM', proto => 'udp', dport => '4500' },
178 { action => 'PARAM', proto => '50' },
179 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
180 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
181 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
182 ],
183 'IRC' => [
184 { action => 'PARAM', proto => 'tcp', dport => '6667' },
185 ],
186 'JabberPlain' => [
187 { action => 'PARAM', proto => 'tcp', dport => '5222' },
188 ],
189 'JabberSecure' => [
190 { action => 'PARAM', proto => 'tcp', dport => '5223' },
191 ],
192 'Jabberd' => [
193 { action => 'PARAM', proto => 'tcp', dport => '5269' },
194 ],
195 'Jetdirect' => [
196 { action => 'PARAM', proto => 'tcp', dport => '9100' },
197 ],
198 'L2TP' => [
199 { action => 'PARAM', proto => 'udp', dport => '1701' },
200 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
201 ],
202 'LDAP' => [
203 { action => 'PARAM', proto => 'tcp', dport => '389' },
204 ],
205 'LDAPS' => [
206 { action => 'PARAM', proto => 'tcp', dport => '636' },
207 ],
208 'MSNP' => [
209 { action => 'PARAM', proto => 'tcp', dport => '1863' },
210 ],
211 'MSSQL' => [
212 { action => 'PARAM', proto => 'tcp', dport => '1433' },
213 ],
214 'Mail' => [
215 { action => 'PARAM', proto => 'tcp', dport => '25' },
216 { action => 'PARAM', proto => 'tcp', dport => '465' },
217 { action => 'PARAM', proto => 'tcp', dport => '587' },
218 ],
219 'Munin' => [
220 { action => 'PARAM', proto => 'tcp', dport => '4949' },
221 ],
222 'MySQL' => [
223 { action => 'PARAM', proto => 'tcp', dport => '3306' },
224 ],
225 'NNTP' => [
226 { action => 'PARAM', proto => 'tcp', dport => '119' },
227 ],
228 'NNTPS' => [
229 { action => 'PARAM', proto => 'tcp', dport => '563' },
230 ],
231 'NTP' => [
232 { action => 'PARAM', proto => 'udp', dport => '123' },
233 ],
234 'NTPbi' => [
235 { action => 'PARAM', proto => 'udp', dport => '123' },
236 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
237 ],
238 'NTPbrd' => [
239 { action => 'PARAM', proto => 'udp', dport => '123' },
240 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
241 ],
242 'OSPF' => [
243 { action => 'PARAM', proto => '89' },
244 ],
245 'OpenVPN' => [
246 { action => 'PARAM', proto => 'udp', dport => '1194' },
247 ],
248 'PCA' => [
249 { action => 'PARAM', proto => 'udp', dport => '5632' },
250 { action => 'PARAM', proto => 'tcp', dport => '5631' },
251 ],
252 'POP3' => [
253 { action => 'PARAM', proto => 'tcp', dport => '110' },
254 ],
255 'POP3S' => [
256 { action => 'PARAM', proto => 'tcp', dport => '995' },
257 ],
258 'PPtP' => [
259 { action => 'PARAM', proto => '47' },
260 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
261 { action => 'PARAM', proto => 'tcp', dport => '1723' },
262 ],
263 'Ping' => [
269d4f13 264 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 265 ],
266 'PostgreSQL' => [
267 { action => 'PARAM', proto => 'tcp', dport => '5432' },
268 ],
269 'Printer' => [
270 { action => 'PARAM', proto => 'tcp', dport => '515' },
271 ],
272 'RDP' => [
273 { action => 'PARAM', proto => 'tcp', dport => '3389' },
274 ],
275 'RIPbi' => [
276 { action => 'PARAM', proto => 'udp', dport => '520' },
277 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
278 ],
279 'RNDC' => [
280 { action => 'PARAM', proto => 'tcp', dport => '953' },
281 ],
282 'Razor' => [
283 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
284 ],
285 'Rdate' => [
286 { action => 'PARAM', proto => 'tcp', dport => '37' },
287 ],
288 'Rsync' => [
289 { action => 'PARAM', proto => 'tcp', dport => '873' },
290 ],
291 'SANE' => [
292 { action => 'PARAM', proto => 'tcp', dport => '6566' },
293 ],
294 'SMB' => [
295 { action => 'PARAM', proto => 'udp', dport => '135,445' },
296 { action => 'PARAM', proto => 'udp', dport => '137:139' },
297 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
298 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
299 ],
300 'SMBBI' => [
301 { action => 'PARAM', proto => 'udp', dport => '135,445' },
302 { action => 'PARAM', proto => 'udp', dport => '137:139' },
303 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
304 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
305 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
306 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
307 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
308 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
309 ],
310 'SMBswat' => [
311 { action => 'PARAM', proto => 'tcp', dport => '901' },
312 ],
313 'SMTP' => [
314 { action => 'PARAM', proto => 'tcp', dport => '25' },
315 ],
316 'SMTPS' => [
317 { action => 'PARAM', proto => 'tcp', dport => '465' },
318 ],
319 'SNMP' => [
320 { action => 'PARAM', proto => 'udp', dport => '161:162' },
321 { action => 'PARAM', proto => 'tcp', dport => '161' },
322 ],
323 'SPAMD' => [
324 { action => 'PARAM', proto => 'tcp', dport => '783' },
325 ],
326 'SSH' => [
327 { action => 'PARAM', proto => 'tcp', dport => '22' },
328 ],
329 'SVN' => [
330 { action => 'PARAM', proto => 'tcp', dport => '3690' },
331 ],
332 'SixXS' => [
333 { action => 'PARAM', proto => 'tcp', dport => '3874' },
334 { action => 'PARAM', proto => 'udp', dport => '3740' },
335 { action => 'PARAM', proto => '41' },
336 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
337 ],
338 'Squid' => [
339 { action => 'PARAM', proto => 'tcp', dport => '3128' },
340 ],
341 'Submission' => [
342 { action => 'PARAM', proto => 'tcp', dport => '587' },
343 ],
344 'Syslog' => [
345 { action => 'PARAM', proto => 'udp', dport => '514' },
346 { action => 'PARAM', proto => 'tcp', dport => '514' },
347 ],
348 'TFTP' => [
349 { action => 'PARAM', proto => 'udp', dport => '69' },
350 ],
351 'Telnet' => [
352 { action => 'PARAM', proto => 'tcp', dport => '23' },
353 ],
354 'Telnets' => [
355 { action => 'PARAM', proto => 'tcp', dport => '992' },
356 ],
357 'Time' => [
358 { action => 'PARAM', proto => 'tcp', dport => '37' },
359 ],
360 'Trcrt' => [
361 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 362 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 363 ],
364 'VNC' => [
365 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
366 ],
367 'VNCL' => [
368 { action => 'PARAM', proto => 'tcp', dport => '5500' },
369 ],
370 'Web' => [
371 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 372 { action => 'PARAM', proto => 'tcp', dport => '443' },
373 ],
857f62c8
DM		 374 'Webcache' => [
375 { action => 'PARAM', proto => 'tcp', dport => '8080' },
376 ],
377 'Webmin' => [
378 { action => 'PARAM', proto => 'tcp', dport => '10000' },
379 ],
380 'Whois' => [
381 { action => 'PARAM', proto => 'tcp', dport => '43' },
382 ],
961b4928
DM		 383};
384
385my $pve_fw_parsed_macros;
386my $pve_fw_preferred_macro_names = {};
3a616aa0 387
d8f2505e
DM		 388my $pve_std_chains = {
389 'PVEFW-SET-ACCEPT-MARK' => [
390 "-j MARK --set-mark 1",
391 ],
79929d9c
DM		 392 'PVEFW-DropBroadcast' => [
393 # same as shorewall 'Broadcast'
394 # simply DROP BROADCAST/MULTICAST/ANYCAST
395 # we can use this to reduce logging
396 { action => 'DROP', dsttype => 'BROADCAST' },
397 { action => 'DROP', dsttype => 'MULTICAST' },
398 { action => 'DROP', dsttype => 'ANYCAST' },
399 { action => 'DROP', dest => '224.0.0.0/4' },
400 ],
401 'PVEFW-reject' => [
402 # same as shorewall 'reject'
403 { action => 'DROP', dsttype => 'BROADCAST' },
404 { action => 'DROP', source => '224.0.0.0/4' },
405 { action => 'DROP', proto => 'icmp' },
406 "-p tcp -j REJECT --reject-with tcp-reset",
407 "-p udp -j REJECT --reject-with icmp-port-unreachable",
408 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
409 "-j REJECT --reject-with icmp-host-prohibited",
410 ],
411 'PVEFW-Drop' => [
412 # same as shorewall 'Drop', which is equal to DROP,
413 # but REJECT/DROP some packages to reduce logging,
414 # and ACCEPT critical ICMP types
415 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
416 # we are not interested in BROADCAST/MULTICAST/ANYCAST
417 { action => 'PVEFW-DropBroadcast' },
418 # ACCEPT critical ICMP types
419 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
420 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
421 # Drop packets with INVALID state
422 "-m conntrack --ctstate INVALID -j DROP",
423 # Drop Microsoft SMB noise
424 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
425 { action => 'DROP', proto => 'udp', dport => '137:139'},
426 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
427 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
428 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
429 # Drop new/NotSyn traffic so that it doesn't get logged
430 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
431 # Drop DNS replies
432 { action => 'DROP', proto => 'udp', sport => 53 },
433 ],
434 'PVEFW-Reject' => [
435 # same as shorewall 'Reject', which is equal to Reject,
436 # but REJECT/DROP some packages to reduce logging,
437 # and ACCEPT critical ICMP types
438 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
439 # we are not interested in BROADCAST/MULTICAST/ANYCAST
440 { action => 'PVEFW-DropBroadcast' },
441 # ACCEPT critical ICMP types
442 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
443 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
444 # Drop packets with INVALID state
445 "-m conntrack --ctstate INVALID -j DROP",
446 # Drop Microsoft SMB noise
447 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
448 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
449 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
450 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
451 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
452 # Drop new/NotSyn traffic so that it doesn't get logged
453 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
454 # Drop DNS replies
455 { action => 'DROP', proto => 'udp', sport => 53 },
456 ],
d86659ef
DM		 457 'PVEFW-tcpflags' => [
458 # same as shorewall tcpflags action.
459 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
460 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
461 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
462 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
463 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
464 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
465 ],
bee633ab
DM		 466 'PVEFW-smurfs' => [
467 # same as shorewall smurfs action
468 # Filter packets for smurfs (packets with a broadcast address as the source).
469 "-s 0.0.0.0/32 -j RETURN",
470 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
471 "-s 224.0.0.0/4 -g PVEFW-smurflog",
472 ],
d8f2505e
DM		 473};
474
4b586518
DM		 475# iptables -p icmp -h
476my $icmp_type_names = {
477 any => 1,
478 'echo-reply' => 1,
479 'destination-unreachable' => 1,
480 'network-unreachable' => 1,
481 'host-unreachable' => 1,
482 'protocol-unreachable' => 1,
483 'port-unreachable' => 1,
484 'fragmentation-needed' => 1,
485 'source-route-failed' => 1,
486 'network-unknown' => 1,
487 'host-unknown' => 1,
488 'network-prohibited' => 1,
489 'host-prohibited' => 1,
490 'TOS-network-unreachable' => 1,
491 'TOS-host-unreachable' => 1,
492 'communication-prohibited' => 1,
493 'host-precedence-violation' => 1,
494 'precedence-cutoff' => 1,
495 'source-quench' => 1,
496 'redirect' => 1,
497 'network-redirect' => 1,
498 'host-redirect' => 1,
499 'TOS-network-redirect' => 1,
500 'TOS-host-redirect' => 1,
501 'echo-request' => 1,
502 'router-advertisement' => 1,
503 'router-solicitation' => 1,
504 'time-exceeded' => 1,
505 'ttl-zero-during-transit' => 1,
506 'ttl-zero-during-reassembly' => 1,
507 'parameter-problem' => 1,
508 'ip-header-bad' => 1,
509 'required-option-missing' => 1,
510 'timestamp-request' => 1,
511 'timestamp-reply' => 1,
512 'address-mask-request' => 1,
513 'address-mask-reply' => 1,
514};
515
54cd19a8 516sub init_firewall_macros {
6158271d 517
961b4928 518 $pve_fw_parsed_macros = {};
9aab3127 519
961b4928 520 foreach my $k (keys %$pve_fw_macros) {
e5076eee
DM		 521 my $lc_name = lc($k);
522 my $macro = $pve_fw_macros->{$k};
523 $pve_fw_preferred_macro_names->{$lc_name} = $k;
524 $pve_fw_parsed_macros->{$k} = $macro;
961b4928 525 }
9aab3127
DM		 526}
527
54cd19a8
DM		 528init_firewall_macros();
529
fcba0beb
DM		 530my $etc_services;
531
532sub get_etc_services {
533
534 return $etc_services if $etc_services;
535
536 my $filename = "/etc/services";
537
538 my $fh = IO::File->new($filename, O_RDONLY);
539 if (!$fh) {
540 warn "unable to read '$filename' - $!\n";
541 return {};
542 }
543
544 my $services = {};
545
546 while (my $line = <$fh>) {
547 chomp ($line);
548 next if $line =~m/^#/;
549 next if ($line =~m/^\s*$/);
550
551 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
552 $services->{byid}->{$2}->{name} = $1;
35b66e9d 553 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 554 $services->{byid}->{$2}->{$3} = 1;
555 $services->{byname}->{$1} = $services->{byid}->{$2};
556 }
557 }
558
559 close($fh);
560
6158271d
DM		 561 $etc_services = $services;
562
3a616aa0 563
fcba0beb
DM		 564 return $etc_services;
565}
566
567my $etc_protocols;
568
569sub get_etc_protocols {
570 return $etc_protocols if $etc_protocols;
571
572 my $filename = "/etc/protocols";
573
574 my $fh = IO::File->new($filename, O_RDONLY);
575 if (!$fh) {
576 warn "unable to read '$filename' - $!\n";
577 return {};
578 }
579
580 my $protocols = {};
581
582 while (my $line = <$fh>) {
583 chomp ($line);
584 next if $line =~m/^#/;
585 next if ($line =~m/^\s*$/);
586
587 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
588 $protocols->{byid}->{$2}->{name} = $1;
589 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
590 }
591 }
592
593 close($fh);
594
595 $etc_protocols = $protocols;
596
597 return $etc_protocols;
598}
599
ecbea048
DM		 600sub parse_address_list {
601 my ($str) = @_;
602
d6de1dc2 603 my $nbaor = 0;
ecbea048
DM		 604 foreach my $aor (split(/,/, $str)) {
605 if (!Net::IP->new($aor)) {
606 my $err = Net::IP::Error();
607 die "invalid IP address: $err\n";
d6de1dc2
AD		 608 }else{
609 $nbaor++;
ecbea048
DM		 610 }
611 }
d6de1dc2 612 return $nbaor;
ecbea048 613}
dddd9413 614
fcba0beb
DM		 615sub parse_port_name_number_or_range {
616 my ($str) = @_;
617
618 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 619 my $nbports = 0;
fcba0beb 620 foreach my $item (split(/,/, $str)) {
4cdbb3b7 621 my $portlist = "";
35b66e9d 622 my $oldpon = undef;
4b586518 623 $nbports++;
fcba0beb 624 foreach my $pon (split(':', $item, 2)) {
35b66e9d 625 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 626 if ($pon =~ m/^\d+$/){
857f62c8 627 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 628 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
629 $oldpon = $pon;
4cdbb3b7
AD		 630 }else{
631 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
632 }
fcba0beb
DM		 633 }
634 }
635
4cdbb3b7 636 return ($nbports);
fcba0beb
DM		 637}
638
54cd19a8
DM		 639PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
640sub pve_fw_verify_port_spec {
641 my ($portstr) = @_;
642
643 parse_port_name_number_or_range($portstr);
644
645 return $portstr;
646}
647
648PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
649sub pve_fw_verify_v4addr_spec {
650 my ($list) = @_;
651
652 parse_address_list($list);
653
654 return $list;
655}
656
657PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
658sub pve_fw_verify_protocol_spec {
659 my ($proto) = @_;
660
661 my $protocols = get_etc_protocols();
662
663 die "unknown protocol '$proto'\n" if $proto &&
664 !(defined($protocols->{byname}->{$proto}) ||
665 defined($protocols->{byid}->{$proto}));
666
667 return $proto;
668}
669
670
d1c53b3e 671# helper function for API
d1c53b3e 672
9c7e0858
DM		 673my $rule_properties = {
674 pos => {
675 description => "Update rule at position <pos>.",
676 type => 'integer',
677 minimum => 0,
678 optional => 1,
679 },
680 digest => {
681 type => 'string',
682 optional => 1,
54cd19a8
DM		 683 maxLength => 27,
684 minLength => 27,
9c7e0858
DM		 685 },
686 type => {
687 type => 'string',
688 optional => 1,
689 enum => ['in', 'out', 'group'],
690 },
691 action => {
692 type => 'string',
693 optional => 1,
54cd19a8 694 enum => ['ACCEPT', 'DROP', 'REJECT'],
9c7e0858 695 },
e5076eee
DM		 696 macro => {
697 type => 'string',
698 optional => 1,
54cd19a8 699 maxLength => 128,
e5076eee 700 },
54cd19a8 701 iface => get_standard_option('pve-iface', { optional => 1 }),
9c7e0858 702 source => {
54cd19a8 703 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 704 optional => 1,
705 },
706 dest => {
54cd19a8 707 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 708 optional => 1,
709 },
710 proto => {
54cd19a8 711 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 712 optional => 1,
713 },
714 enable => {
715 type => 'boolean',
716 optional => 1,
717 },
718 sport => {
54cd19a8 719 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 720 optional => 1,
721 },
722 dport => {
54cd19a8 723 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 724 optional => 1,
725 },
726 comment => {
727 type => 'string',
728 optional => 1,
729 },
730};
731
ce36326d
DM		 732sub cleanup_fw_rule {
733 my ($rule, $digest, $pos) = @_;
734
735 my $r = {};
736
737 foreach my $k (keys %$rule) {
738 next if !$rule_properties->{$k};
739 my $v = $rule->{$k};
740 next if !defined($v);
741 $r->{$k} = $v;
742 $r->{digest} = $digest;
743 $r->{pos} = $pos;
744 }
745
746 return $r;
747}
748
9c7e0858
DM		 749sub add_rule_properties {
750 my ($properties) = @_;
751
752 foreach my $k (keys %$rule_properties) {
753 $properties->{$k} = $rule_properties->{$k};
754 }
755
756 return $properties;
757}
758
759sub copy_rule_data {
760 my ($rule, $param) = @_;
761
762 foreach my $k (keys %$rule_properties) {
763 if (defined(my $v = $param->{$k})) {
764 if ($v eq '' || $v eq '-') {
765 delete $rule->{$k};
766 } else {
767 $rule->{$k} = $v;
768 }
769 } else {
770 delete $rule->{$k};
771 }
772 }
773 return $rule;
774}
775
776# core functions
780bcc0f
DM		 777my $bridge_firewall_enabled = 0;
778
779sub enable_bridge_firewall {
780
781 return if $bridge_firewall_enabled; # only once
782
5f0a912c
DM		 783 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
784 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 785
6a8a75db
DM		 786 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
787 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
788
780bcc0f
DM		 789 $bridge_firewall_enabled = 1;
790}
791
8cebfa6f 792my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 793
3a616aa0
AD		 794sub iptables {
795 my ($cmd) = @_;
796
797 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
798}
799
b16e818e
DM		 800sub iptables_restore_cmdlist {
801 my ($cmdlist) = @_;
3a616aa0 802
3fa83edf 803 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 804}
805
34cdedfa
AD		 806sub ipset_restore_cmdlist {
807 my ($cmdlist) = @_;
808
809 run_command(" /usr/sbin/ipset restore", input => $cmdlist);
810}
811
de2a57cd
DM		 812sub iptables_get_chains {
813
814 my $res = {};
815
816 # check what chains we want to track
817 my $is_pvefw_chain = sub {
818 my $name = shift;
819
dec84fcd
DM		 820 return 1 if $name =~ m/^PVEFW-\S+$/;
821
de2a57cd 822 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 823
824 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
825
9e15114a
DM		 826 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
827
da6fc60b 828 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
f50656c2 829 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 830
831 return undef;
832 };
833
834 my $table = '';
835
c4a2e5ae
DM		 836 my $hooks = {};
837
de2a57cd
DM		 838 my $parser = sub {
839 my $line = shift;
840
841 return if $line =~ m/^#/;
842 return if $line =~ m/^\s*$/;
843
844 if ($line =~ m/^\*(\S+)$/) {
845 $table = $1;
846 return;
847 }
848
849 return if $table ne 'filter';
850
851 if ($line =~ m/^:(\S+)\s/) {
852 my $chain = $1;
853 return if !&$is_pvefw_chain($chain);
3fa83edf 854 $res->{$chain} = "unknown";
09d5f68e 855 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 856 my ($chain, $sig) = ($1, $2);
de2a57cd 857 return if !&$is_pvefw_chain($chain);
3fa83edf 858 $res->{$chain} = $sig;
c4a2e5ae
DM		 859 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
860 $hooks->{$1} = 1;
de2a57cd
DM		 861 } else {
862 # simply ignore the rest
863 return;
864 }
865 };
866
867 run_command("/sbin/iptables-save", outfunc => $parser);
868
c4a2e5ae 869 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 870}
871
9bf7d929
DM		 872sub iptables_chain_digest {
873 my ($rules) = @_;
874 my $digest = Digest::SHA->new('sha1');
875 foreach my $rule (@$rules) { # order is important
876 $digest->add($rule);
877 }
878 return $digest->b64digest;
879}
880
3f95d14a
DM		 881sub ipset_chain_digest {
882 my ($rules) = @_;
883 my $digest = Digest::SHA->new('sha1');
884 foreach my $rule (sort @$rules) { # note: sorted
885 $digest->add($rule);
886 }
887 return $digest->b64digest;
888}
889
34cdedfa
AD		 890sub ipset_get_chains {
891
892 my $res = {};
893 my $chains = {};
894
895 my $parser = sub {
896 my $line = shift;
897
898 return if $line =~ m/^#/;
899 return if $line =~ m/^\s*$/;
900 if ($line =~ m/^(\S+)\s(\S+)\s(\S+)/) {
3f95d14a 901 push @{$chains->{$2}}, $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 $res;
916}
917
3a616aa0
AD		 918sub iptables_chain_exist {
919 my ($chain) = @_;
920
921 eval{
922 iptables("-n --list $chain");
923 };
924 return undef if $@;
925
926 return 1;
927}
928
929sub iptables_rule_exist {
930 my ($rule) = @_;
931
932 eval{
933 iptables("-C $rule");
934 };
935 return undef if $@;
936
937 return 1;
938}
939
eba0fb64 940sub ruleset_generate_cmdstr {
2f906466 941 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 942
00bb4391 943 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 944
e5076eee
DM		 945 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
946
947 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
948 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
949 my $nbsource = $rule->{source} ? parse_address_list( $rule->{source}) : 0;
950 my $nbdest = $rule->{dest} ? parse_address_list($rule->{dest}) : 0;
951
41524a58 952 my @cmd = ();
3a616aa0 953
eba0fb64
DM		 954 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
955 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
956
e5076eee 957 push @cmd, "-m iprange --src-range" if $nbsource > 1;
41524a58 958 push @cmd, "-s $rule->{source}" if $rule->{source};
e5076eee 959 push @cmd, "-m iprange --dst-range" if $nbdest > 1;
41524a58 960 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 961
181390b0 962 if ($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 $rules;
1057};
1058
eba0fb64
DM		 1059sub ruleset_generate_rule {
1060 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
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) {
1071 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto)) {
1072 ruleset_addrule($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,
92e976b3 1267 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 1268 } else {
b47ecc88
AD		 1269 my $accept = generate_nfqueue($options);
1270 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" });
3a616aa0 1271 }
4e6112f9 1272 }
3a616aa0 1273 }
9e15114a
DM		 1274}
1275
b47ecc88
AD		 1276sub generate_nfqueue {
1277 my ($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 $rule->{type} ne 'in';
23e888f8 1446 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
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 $rule->{type} ne 'out';
23e888f8 1471 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
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 $rule->{type} ne 'in';
b47ecc88 1495 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
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,
1508 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
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($sport);
1583
1584 parse_address_list($source) if $source;
1585 parse_address_list($dest) if $dest;
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/^\[ipgroup\s+(\S+)\]\s*$/i) {
1816 $section = 'ipset';
1817 $group = lc($1);
1818 $res->{$section}->{$group}->{type} = 'hash:ip family inet hashsize 1024 maxelem 65536 ';
34cdedfa
AD		 1819 next;
1820 }
c6f5cc88 1821
34cdedfa
AD		 1822 if ($line =~ m/^\[netgroup\s+(\S+)\]\s*$/i) {
1823 $section = 'ipset';
1824 $group = lc($1);
1825 $res->{$section}->{$group}->{type} = 'hash:net family inet hashsize 1024 maxelem 65536 ';
34cdedfa
AD		 1826 next;
1827 }
1828
c6f5cc88 1829 if (!$section) {
961b4928 1830 warn "$prefix: skip line - no section";
51bae274
DM		 1831 next;
1832 }
1833
c6f5cc88
DM		 1834 if ($section eq 'options') {
1835 eval {
1836 my ($opt, $value) = parse_clusterfw_option($line);
1837 $res->{options}->{$opt} = $value;
1838 };
1839 warn "$prefix: $@" if $@;
1840 } elsif ($section eq 'rules') {
1841 my $rule;
1842 eval { $rule = parse_fw_rule($line, 1, 1); };
1843 if (my $err = $@) {
1844 warn "$prefix: $err";
1845 next;
1846 }
1847 push @{$res->{$section}}, $rule;
1848 } elsif ($section eq 'groups') {
34cdedfa
AD		 1849 my $rule;
1850 eval { $rule = parse_fw_rule($line, 0, 0); };
1851 if (my $err = $@) {
1852 warn "$prefix: $err";
1853 next;
1854 }
3f95d14a 1855 push @{$res->{$section}->{$group}}, $rule;
3f95d14a
DM		 1856 } elsif ($section eq 'ipset') {
1857 chomp $line;
34cdedfa
AD		 1858 my $ip;
1859 if (!Net::IP->new($line)) {
1860 warn "$prefix: $line is not an valid ip address";
1861 next;
1862 }
1863 push @{$res->{$section}->{$group}->{ip}}, $line;
51bae274 1864 }
5e1267a5
DM		 1865 }
1866
d1c53b3e
DM		 1867 $res->{digest} = $digest->b64digest;
1868
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 $vmfw_conf;
1931}
1932
6fc63ffd 1933sub read_vm_firewall_configs {
5e1267a5 1934 my ($vmdata) = @_;
6fc63ffd 1935 my $vmfw_configs = {};
c8301d63 1936
5e1267a5 1937 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
e7b35711
DM		 1938 my $vmfw_conf = load_vmfw_conf($vmid);
1939 next if !$vmfw_conf->{options}; # skip if file does not exists
1940 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM		 1941 }
1942
6fc63ffd 1943 return $vmfw_configs;
5e1267a5
DM		 1944}
1945
2d404ffc
DM		 1946sub get_option_log_level {
1947 my ($options, $k) = @_;
1948
1949 my $v = $options->{$k};
178a63be 1950 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1951
1952 return undef if $v eq '' || $v eq 'nolog';
1953
1954 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1955
1956 return $v if ($v >= 0) && ($v <= 7);
1957
1958 warn "unknown log level ($k = '$v')\n";
1959
1960 return undef;
1961}
1962
d8f2505e 1963sub generate_std_chains {
2d404ffc
DM		 1964 my ($ruleset, $options) = @_;
1965
1966 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1967
1968 # same as shorewall smurflog.
782c4cde
DM		 1969 my $chain = 'PVEFW-smurflog';
1970
1971 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1972 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 1973
1974 # same as shorewall logflags action.
1975 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM		 1976 $chain = 'PVEFW-logflags';
1977 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1978 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1979 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 1980
1981 foreach my $chain (keys %$pve_std_chains) {
1982 ruleset_create_chain($ruleset, $chain);
1983 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1984 if (ref($rule)) {
1985 ruleset_generate_rule($ruleset, $chain, $rule);
1986 } else {
1987 ruleset_addrule($ruleset, $chain, $rule);
1988 }
1989 }
1990 }
1991}
1992
34cdedfa
AD		 1993sub generate_ipset_chains {
1994 my ($ipset_ruleset, $options) = @_;
1995
1996 foreach my $ipset (keys %{$options->{ipset}}) {
1997 generate_ipset($ipset_ruleset, $ipset, $options->{ipset}->{$ipset});
1998 }
1999}
2000
2001sub generate_ipset {
2002 my ($ipset_ruleset, $name, $options) = @_;
2003
2004 push @{$ipset_ruleset->{$name}}, "create $name $options->{type}";
2005
2006 foreach my $ip (@{$options->{ip}}) {
2007 push @{$ipset_ruleset->{$name}}, "add $name $ip";
2008 }
2009}
2010
6b9f68a2
DM		 2011sub save_pvefw_status {
2012 my ($status) = @_;
2013
2014 die "unknown status '$status' - internal error"
2015 if $status !~ m/^(stopped|active)$/;
2016
2017 mkdir dirname($pve_fw_status_filename);
2018 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2019}
2020
2021sub read_pvefw_status {
2022
2023 my $status = 'unknown';
2024
2025 return 'stopped' if ! -f $pve_fw_status_filename;
2026
2027 eval {
2028 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2029 };
2030 warn $@ if $@;
2031
2032 return $status;
2033}
2034
530c005e
DM		 2035# fixme: move to pve-common PVE::ProcFSTools
2036sub read_proc_net_route {
2037 my $filename = "/proc/net/route";
2038
2039 my $res = {};
2040
2041 my $fh = IO::File->new ($filename, "r");
2042 return $res if !$fh;
2043
2044 my $int_to_quad = sub {
2045 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2046 };
2047
2048 while (defined(my $line = <$fh>)) {
2049 next if $line =~/^Iface\s+Destination/; # skip head
2050 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2051 push @{$res->{$iface}}, {
2052 dest => &$int_to_quad(hex($dest)),
2053 gateway => &$int_to_quad(hex($gateway)),
2054 mask => &$int_to_quad(hex($mask)),
2055 metric => $metric,
2056 mtu => $mtu,
2057 };
2058 }
2059
2060 return $res;
2061}
2062
fca39c2c 2063sub load_clusterfw_conf {
530c005e 2064
fca39c2c
DM		 2065 my $cluster_conf = {};
2066 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
c6f5cc88 2067 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
51bae274 2068 }
5e1267a5 2069
fca39c2c 2070 return $cluster_conf;
e5d76bde
DM		 2071}
2072
c6f5cc88
DM		 2073my $rules_to_conf = sub {
2074 my ($rules, $need_iface) = @_;
2075
2076 my $raw = '';
2077
2078 foreach my $rule (@$rules) {
2079 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2080 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2081 $raw .= uc($rule->{type});
2082 $raw .= " " . $rule->{action};
2083 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2084 $raw .= " " . ($rule->{source} || '-');
2085 $raw .= " " . ($rule->{dest} || '-');
2086 $raw .= " " . ($rule->{proto} || '-');
2087 $raw .= " " . ($rule->{dport} || '-');
2088 $raw .= " " . ($rule->{sport} || '-');
2089 $raw .= " # " . encode('utf8', $rule->{comment})
2090 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2091 $raw .= "\n";
2092 } else {
2093 die "implement me '$rule->{type}'";
2094 }
2095 }
2096
2097 return $raw;
2098};
2099
fca39c2c
DM		 2100sub save_clusterfw_conf {
2101 my ($cluster_conf) = @_;
9c7e0858
DM		 2102
2103 my $raw = '';
9c7e0858 2104
c6f5cc88
DM		 2105 my $options = $cluster_conf->{options};
2106 if (scalar(keys %$options)) {
2107 $raw .= "[OPTIONS]\n\n";
2108 foreach my $opt (keys %$options) {
2109 $raw .= "$opt: $options->{$opt}\n";
9c7e0858 2110 }
c6f5cc88
DM		 2111 $raw .= "\n";
2112 }
9c7e0858 2113
c6f5cc88
DM		 2114 # fixme: save ipset
2115
2116 my $rules = $cluster_conf->{rules};
2117 if (scalar(@$rules)) {
2118 $raw .= "[RULES]\n\n";
2119 $raw .= &$rules_to_conf($rules, 1);
2120 $raw .= "\n";
2121 }
2122
2123 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2124 my $rules = $cluster_conf->{groups}->{$group};
2125 $raw .= "[group $group]\n\n";
2126 $raw .= &$rules_to_conf($rules, 0);
9c7e0858
DM		 2127 $raw .= "\n";
2128 }
2129
fca39c2c 2130 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM		 2131}
2132
8b27beb9
DM		 2133sub load_hostfw_conf {
2134
2135 my $hostfw_conf = {};
2136 my $filename = "/etc/pve/local/host.fw";
2137 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2138 $hostfw_conf = parse_host_fw_rules($filename, $fh);
2139 }
2140 return $hostfw_conf;
2141}
2142
e5d76bde
DM		 2143sub compile {
2144 my $vmdata = read_local_vm_config();
2145 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2146
2147 my $routing_table = read_proc_net_route();
2148
fca39c2c 2149 my $cluster_conf = load_clusterfw_conf();
e5d76bde 2150
34cdedfa 2151 my $ipset_ruleset = {};
fca39c2c 2152 generate_ipset_chains($ipset_ruleset, $cluster_conf);
34cdedfa 2153
3fa83edf
DM		 2154 my $ruleset = {};
2155
dec84fcd
DM		 2156 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2157 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2158
fadb13dd 2159 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 2160
8b27beb9
DM		 2161 my $hostfw_conf = load_hostfw_conf();
2162 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2163
92e976b3 2164 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2165
6d2ab017 2166 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2167
fca39c2c 2168 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
3fa83edf 2169
6158271d 2170 # generate firewall rules for QEMU VMs
3fa83edf
DM		 2171 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2172 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 2173 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 2174 next if !$vmfw_conf;
2175 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 2176
2177 foreach my $netid (keys %$conf) {
2178 next if $netid !~ m/^net(\d+)$/;
2179 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2180 next if !$net;
2181 my $iface = "tap${vmid}i$1";
5e1267a5 2182
3fa83edf
DM		 2183 my $bridge = $net->{bridge};
2184 next if !$bridge; # fixme: ?
2185
2186 $bridge .= "v$net->{tag}" if $net->{tag};
2187
530c005e 2188 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 2189
c29f55c9 2190 my $macaddr = $net->{macaddr};
fca39c2c 2191 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2192 $vmfw_conf, $vmid, $bridge, 'IN');
fca39c2c 2193 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2194 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM		 2195 }
2196 }
c8301d63
DM		 2197
2198 # generate firewall rules for OpenVZ containers
2199 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2200 my $conf = $vmdata->{openvz}->{$vmid};
2201
2202 my $vmfw_conf = $vmfw_configs->{$vmid};
2203 next if !$vmfw_conf;
2204 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2205
2206 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2207 my $ip = $conf->{ip_address}->{value};
fca39c2c
DM		 2208 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2209 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 2210 }
2211
2212 if ($conf->{netif} && $conf->{netif}->{value}) {
2213 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 2214 foreach my $netid (keys %$netif) {
2215 my $d = $netif->{$netid};
2216 my $bridge = $d->{bridge};
2217 if (!$bridge) {
2218 warn "no bridge device for CT $vmid iface '$netid'\n";
2219 next; # fixme?
2220 }
530c005e
DM		 2221
2222 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2223
12d0f130 2224 my $macaddr = $d->{mac};
c8301d63 2225 my $iface = $d->{host_ifname};
fca39c2c 2226 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2227 $vmfw_conf, $vmid, $bridge, 'IN');
fca39c2c 2228 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2229 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM		 2230 }
2231 }
2232 }
c0413e35 2233
cc10e5d7 2234 if($hostfw_options->{optimize}){
da6fc60b 2235
e9d9a73e 2236 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
da6fc60b 2237 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
cc10e5d7
AD		 2238 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2239 }
2240
eba0fb64
DM		 2241 # fixme: what log level should we use here?
2242 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2243
c98c037d
DM		 2244 # fixme: should we really block inter-bridge traffic?
2245
2246 # always allow traffic from containers?
2247 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2248
eba0fb64
DM		 2249 # disable interbridge routing
2250 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2251 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
782c4cde
DM		 2252 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2253 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
eba0fb64
DM		 2254 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2255 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2256
34cdedfa 2257 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
3fa83edf
DM		 2258}
2259
2260sub get_ruleset_status {
34cdedfa 2261 my ($ruleset, $verbose, $ipset) = @_;
3fa83edf 2262
34cdedfa
AD		 2263 my $active_chains = undef;
2264 if($ipset){
2265 $active_chains = ipset_get_chains();
2266 }else{
2267 $active_chains = iptables_get_chains();
2268 }
3fa83edf
DM		 2269
2270 my $statushash = {};
2271
2272 foreach my $chain (sort keys %$ruleset) {
9bf7d929
DM		 2273 my $sig;
2274 if ($ipset) {
2275 $sig = ipset_chain_digest($ruleset->{$chain});
2276 } else {
2277 $sig = iptables_chain_digest($ruleset->{$chain});
2278 }
2279
3fa83edf
DM		 2280 $statushash->{$chain}->{sig} = $sig;
2281
2282 my $oldsig = $active_chains->{$chain};
2283 if (!defined($oldsig)) {
2284 $statushash->{$chain}->{action} = 'create';
2285 } else {
2286 if ($oldsig eq $sig) {
2287 $statushash->{$chain}->{action} = 'exists';
2288 } else {
2289 $statushash->{$chain}->{action} = 'update';
2290 }
2291 }
2292 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2293 foreach my $cmd (@{$ruleset->{$chain}}) {
2294 print "\t$cmd\n" if $verbose;
2295 }
2296 }
2297
2298 foreach my $chain (sort keys %$active_chains) {
2299 if (!defined($ruleset->{$chain})) {
2300 my $sig = $active_chains->{$chain};
2301 $statushash->{$chain}->{action} = 'delete';
2302 $statushash->{$chain}->{sig} = $sig;
2303 print "delete $chain ($sig)\n" if $verbose;
2304 }
6158271d 2305 }
3f95d14a 2306
3fa83edf
DM		 2307 return $statushash;
2308}
2309
3fa83edf
DM		 2310sub print_sig_rule {
2311 my ($chain, $sig) = @_;
2312
09d5f68e
DM		 2313 # We just use this to store a SHA1 checksum used to detect changes
2314 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 2315}
2316
df7cb349 2317sub get_ruleset_cmdlist {
a84f4d96 2318 my ($ruleset, $verbose) = @_;
3fa83edf 2319
3fa83edf
DM		 2320 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2321
2322 my $statushash = get_ruleset_status($ruleset, $verbose);
2323
2324 # create missing chains first
2325 foreach my $chain (sort keys %$ruleset) {
2326 my $stat = $statushash->{$chain};
2327 die "internal error" if !$stat;
2328 next if $stat->{action} ne 'create';
886aba9c 2329
3fa83edf
DM		 2330 $cmdlist .= ":$chain - [0:0]\n";
2331 }
2332
dec84fcd 2333 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 2334 if (!PVE::Firewall::iptables_rule_exist($rule)) {
2335 $cmdlist .= "-A $rule\n";
2336 }
dec84fcd 2337 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 2338 if (!PVE::Firewall::iptables_rule_exist($rule)) {
2339 $cmdlist .= "-A $rule\n";
2340 }
2341
dec84fcd 2342 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 2343 if (!PVE::Firewall::iptables_rule_exist($rule)) {
2344 $cmdlist .= "-A $rule\n";
2345 }
2346
2347 foreach my $chain (sort keys %$ruleset) {
2348 my $stat = $statushash->{$chain};
2349 die "internal error" if !$stat;
2350
2351 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2352 $cmdlist .= "-F $chain\n";
2353 foreach my $cmd (@{$ruleset->{$chain}}) {
2354 $cmdlist .= "$cmd\n";
2355 }
2356 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2357 } elsif ($stat->{action} eq 'delete') {
f5d28682 2358 die "internal error"; # this should not happen
3fa83edf
DM		 2359 } elsif ($stat->{action} eq 'exists') {
2360 # do nothing
2361 } else {
2362 die "internal error - unknown status '$stat->{action}'";
2363 }
2364 }
2365
f5d28682
DM		 2366 foreach my $chain (keys %$statushash) {
2367 next if $statushash->{$chain}->{action} ne 'delete';
2368 $cmdlist .= "-F $chain\n";
2369 }
2370 foreach my $chain (keys %$statushash) {
2371 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 2372 next if $chain eq 'PVEFW-INPUT';
2373 next if $chain eq 'PVEFW-OUTPUT';
2374 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 2375 $cmdlist .= "-X $chain\n";
2376 }
2377
3f95d14a
DM		 2378 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2379
3fa83edf
DM		 2380 $cmdlist .= "COMMIT\n";
2381
3f95d14a 2382 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 2383}
2384
34cdedfa
AD		 2385sub get_ipset_cmdlist {
2386 my ($ruleset, $verbose) = @_;
2387
2388 my $cmdlist = "";
2389
2390 my $statushash = get_ruleset_status($ruleset, $verbose, 1);
2391
2392 foreach my $chain (sort keys %$ruleset) {
2393 my $stat = $statushash->{$chain};
2394 die "internal error" if !$stat;
2395
2396 if ($stat->{action} eq 'create') {
2397 foreach my $cmd (@{$ruleset->{$chain}}) {
2398 $cmdlist .= "$cmd\n";
2399 }
2400 }
2401
2402 if ($stat->{action} eq 'update') {
2403 my $chain_swap = $chain."_swap";
2404
2405 foreach my $cmd (@{$ruleset->{$chain}}) {
2406 $cmd =~ s/$chain/$chain_swap/;
2407 $cmdlist .= "$cmd\n";
2408
2409 }
2410 $cmdlist .= "swap $chain_swap $chain\n";
2411 $cmdlist .= "flush $chain_swap\n";
2412 $cmdlist .= "destroy $chain_swap\n";
34cdedfa
AD		 2413 }
2414
2415 }
2416
2417 foreach my $chain (keys %$statushash) {
2418 next if $statushash->{$chain}->{action} ne 'delete';
3f95d14a 2419
34cdedfa
AD		 2420 $cmdlist .= "flush $chain\n";
2421 $cmdlist .= "destroy $chain\n";
2422 }
2423
3f95d14a
DM		 2424 my $changes = $cmdlist ? 1 : 0;
2425
2426 return wantarray ? ($cmdlist, $changes) : $cmdlist;
34cdedfa
AD		 2427}
2428
6b9f68a2 2429sub apply_ruleset {
34cdedfa 2430 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM		 2431
2432 enable_bridge_firewall();
2433
edb75ba9
DM		 2434 update_nf_conntrack_max($hostfw_conf);
2435
34cdedfa
AD		 2436 my $ipsetcmdlist = get_ipset_cmdlist($ipset_ruleset, $verbose);
2437
df7cb349 2438 my $cmdlist = get_ruleset_cmdlist($ruleset, $verbose);
6b9f68a2 2439
3f95d14a
DM		 2440 print $ipsetcmdlist if $verbose;
2441
3fa83edf
DM		 2442 print $cmdlist if $verbose;
2443
34cdedfa
AD		 2444 ipset_restore_cmdlist($ipsetcmdlist);
2445
3fa83edf
DM		 2446 iptables_restore_cmdlist($cmdlist);
2447
6158271d 2448 # test: re-read status and check if everything is up to date
6b9f68a2 2449 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 2450
2451 my $errors;
2452 foreach my $chain (sort keys %$ruleset) {
2453 my $stat = $statushash->{$chain};
2454 if ($stat->{action} ne 'exists') {
2455 warn "unable to update chain '$chain'\n";
2456 $errors = 1;
2457 }
2458 }
b6360c3f 2459
3fa83edf 2460 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 2461}
2462
490cdead
DM		 2463sub update_nf_conntrack_max {
2464 my ($hostfw_conf) = @_;
2465
2466 my $max = 65536; # reasonable default
2467
2468 my $options = $hostfw_conf->{options} || {};
2469
2470 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2471 $max = $options->{nf_conntrack_max};
2472 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2473 }
2474
2475 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2476 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2477
2478 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2479
2480 if ($current != $max) {
2481 my $hashsize = int($max/4);
2482 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2483 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2484 }
2485}
2486
c4a2e5ae
DM		 2487sub remove_pvefw_chains {
2488
2489 my ($chash, $hooks) = iptables_get_chains();
2490 my $cmdlist = "*filter\n";
2491
2492 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2493 if ($hooks->{$h}) {
2494 $cmdlist .= "-D $h -j PVEFW-$h\n";
2495 }
2496 }
2497
2498 foreach my $chain (keys %$chash) {
2499 $cmdlist .= "-F $chain\n";
2500 }
2501
2502 foreach my $chain (keys %$chash) {
2503 $cmdlist .= "-X $chain\n";
2504 }
2505 $cmdlist .= "COMMIT\n";
2506
2507 iptables_restore_cmdlist($cmdlist);
2508}
2509
6b9f68a2
DM		 2510sub update {
2511 my ($start, $verbose) = @_;
2512
2513 my $code = sub {
2514 my $status = read_pvefw_status();
2515
3f95d14a 2516 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
490cdead 2517
6b9f68a2
DM		 2518 if ($start || $status eq 'active') {
2519
2520 save_pvefw_status('active') if ($status ne 'active');
2521
34cdedfa 2522 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM		 2523 } else {
2524 print "Firewall not active (status = $status)\n" if $verbose;
2525 }
2526 };
2527
2528 run_locked($code);
2529}
2530
2531
b6360c3f 25321;
Firewall test scripts