]> 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
avoid multiple calls to ipset_get_chains()
[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 $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 793
b16e818e
DM		 794sub iptables_restore_cmdlist {
795 my ($cmdlist) = @_;
3a616aa0 796
3fa83edf 797 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 798}
799
34cdedfa
AD		 800sub ipset_restore_cmdlist {
801 my ($cmdlist) = @_;
802
dd7a13fd 803 run_command("/usr/sbin/ipset restore", input => $cmdlist);
34cdedfa
AD		 804}
805
de2a57cd
DM		 806sub iptables_get_chains {
807
808 my $res = {};
809
810 # check what chains we want to track
811 my $is_pvefw_chain = sub {
812 my $name = shift;
813
dec84fcd
DM		 814 return 1 if $name =~ m/^PVEFW-\S+$/;
815
de2a57cd 816 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 817
818 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
819
9e15114a
DM		 820 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
821
da6fc60b 822 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
f50656c2 823 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 824
825 return undef;
826 };
827
828 my $table = '';
829
c4a2e5ae
DM		 830 my $hooks = {};
831
de2a57cd
DM		 832 my $parser = sub {
833 my $line = shift;
834
835 return if $line =~ m/^#/;
836 return if $line =~ m/^\s*$/;
837
838 if ($line =~ m/^\*(\S+)$/) {
839 $table = $1;
840 return;
841 }
842
843 return if $table ne 'filter';
844
845 if ($line =~ m/^:(\S+)\s/) {
846 my $chain = $1;
847 return if !&$is_pvefw_chain($chain);
3fa83edf 848 $res->{$chain} = "unknown";
09d5f68e 849 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 850 my ($chain, $sig) = ($1, $2);
de2a57cd 851 return if !&$is_pvefw_chain($chain);
3fa83edf 852 $res->{$chain} = $sig;
c4a2e5ae
DM		 853 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
854 $hooks->{$1} = 1;
de2a57cd
DM		 855 } else {
856 # simply ignore the rest
857 return;
858 }
859 };
860
861 run_command("/sbin/iptables-save", outfunc => $parser);
862
c4a2e5ae 863 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 864}
865
9bf7d929
DM		 866sub iptables_chain_digest {
867 my ($rules) = @_;
868 my $digest = Digest::SHA->new('sha1');
869 foreach my $rule (@$rules) { # order is important
870 $digest->add($rule);
871 }
872 return $digest->b64digest;
873}
874
3f95d14a
DM		 875sub ipset_chain_digest {
876 my ($rules) = @_;
4bd0a9c4 877
3f95d14a
DM		 878 my $digest = Digest::SHA->new('sha1');
879 foreach my $rule (sort @$rules) { # note: sorted
880 $digest->add($rule);
881 }
882 return $digest->b64digest;
883}
884
34cdedfa
AD		 885sub ipset_get_chains {
886
887 my $res = {};
888 my $chains = {};
889
890 my $parser = sub {
891 my $line = shift;
892
893 return if $line =~ m/^#/;
894 return if $line =~ m/^\s*$/;
895 if ($line =~ m/^(\S+)\s(\S+)\s(\S+)/) {
3f95d14a 896 push @{$chains->{$2}}, $line;
34cdedfa
AD		 897 } else {
898 # simply ignore the rest
899 return;
900 }
901 };
902
3f95d14a 903 run_command("/usr/sbin/ipset save", outfunc => $parser);
34cdedfa 904
3f95d14a
DM		 905 # compute digest for each chain
906 foreach my $chain (keys %$chains) {
907 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 908 }
909
910 return $res;
911}
912
eba0fb64 913sub ruleset_generate_cmdstr {
2f906466 914 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 915
00bb4391 916 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 917
e5076eee
DM		 918 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
919
920 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
921 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
922 my $nbsource = $rule->{source} ? parse_address_list( $rule->{source}) : 0;
923 my $nbdest = $rule->{dest} ? parse_address_list($rule->{dest}) : 0;
924
41524a58 925 my @cmd = ();
3a616aa0 926
eba0fb64
DM		 927 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
928 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
929
e5076eee 930 push @cmd, "-m iprange --src-range" if $nbsource > 1;
41524a58 931 push @cmd, "-s $rule->{source}" if $rule->{source};
e5076eee 932 push @cmd, "-m iprange --dst-range" if $nbdest > 1;
41524a58 933 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 934
181390b0 935 if ($rule->{proto}) {
41524a58 936 push @cmd, "-p $rule->{proto}";
e3a1d391 937
181390b0 938 my $multiport = 0;
e5076eee
DM		 939 $multiport++ if $nbdport > 1;
940 $multiport++ if $nbsport > 1;
e3a1d391 941
41524a58 942 push @cmd, "--match multiport" if $multiport;
4b586518 943
181390b0
DM		 944 die "multiport: option '--sports' cannot be used together with '--dports'\n"
945 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
946
947 if ($rule->{dport}) {
948 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
949 # Note: we use dport to store --icmp-type
950 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 951 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0 952 } else {
e5076eee 953 if ($nbdport > 1) {
181390b0 954 if ($multiport == 2) {
41524a58 955 push @cmd, "--ports $rule->{dport}";
181390b0 956 } else {
41524a58 957 push @cmd, "--dports $rule->{dport}";
181390b0 958 }
e3a1d391 959 } else {
41524a58 960 push @cmd, "--dport $rule->{dport}";
e3a1d391 961 }
4b586518
DM		 962 }
963 }
4b586518 964
181390b0 965 if ($rule->{sport}) {
e5076eee 966 if ($nbsport > 1) {
41524a58 967 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 968 } else {
41524a58 969 push @cmd, "--sport $rule->{sport}";
181390b0 970 }
4b586518 971 }
181390b0
DM		 972 } elsif ($rule->{dport} || $rule->{sport}) {
973 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
974 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 975 }
976
41524a58 977 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 978
979 if (my $action = $rule->{action}) {
2f906466 980 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 981 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 982 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 983 }
3a616aa0 984
eba0fb64
DM		 985 return scalar(@cmd) ? join(' ', @cmd) : undef;
986}
987
e5076eee
DM		 988my $apply_macro = sub {
989 my ($macro_name, $param) = @_;
990
991 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
992 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
993
994 my $rules = [];
995
996 foreach my $templ (@$macro_rules) {
997 my $rule = {};
998 my $param_used = {};
999 foreach my $k (keys %$templ) {
1000 my $v = $templ->{$k};
1001 if ($v eq 'PARAM') {
1002 $v = $param->{$k};
1003 $param_used->{$k} = 1;
1004 } elsif ($v eq 'DEST') {
1005 $v = $param->{dest};
1006 $param_used->{dest} = 1;
1007 } elsif ($v eq 'SOURCE') {
1008 $v = $param->{source};
1009 $param_used->{source} = 1;
1010 }
1011
1012 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1013 $rule->{$k} = $v;
1014 }
1015 foreach my $k (keys %$param) {
1016 next if $k eq 'macro';
1017 next if !defined($param->{$k});
1018 next if $param_used->{$k};
1019 if (defined($rule->{$k})) {
1020 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1021 if $rule->{$k} ne $param->{$k};
1022 } else {
1023 $rule->{$k} = $param->{$k};
1024 }
1025 }
1026 push @$rules, $rule;
1027 }
1028
1029 return $rules;
1030};
1031
eba0fb64
DM		 1032sub ruleset_generate_rule {
1033 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1034
e5076eee
DM		 1035 my $rules;
1036
1037 if ($rule->{macro}) {
1038 $rules = &$apply_macro($rule->{macro}, $rule);
1039 } else {
1040 $rules = [ $rule ];
1041 }
1042
1043 foreach my $tmp (@$rules) {
1044 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto)) {
1045 ruleset_addrule($ruleset, $chain, $cmdstr);
1046 }
41524a58 1047 }
3fa83edf 1048}
0f168d7b 1049
eba0fb64
DM		 1050sub ruleset_generate_rule_insert {
1051 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1052
e5076eee
DM		 1053 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1054
eba0fb64
DM		 1055 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1056 ruleset_insertrule($ruleset, $chain, $cmdstr);
1057 }
1058}
3fa83edf
DM		 1059
1060sub ruleset_create_chain {
1061 my ($ruleset, $chain) = @_;
3a616aa0 1062
d050c724 1063 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1064 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1065
3fa83edf
DM		 1066 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1067
1068 $ruleset->{$chain} = [];
3a616aa0
AD		 1069}
1070
3fa83edf
DM		 1071sub ruleset_chain_exist {
1072 my ($ruleset, $chain) = @_;
3a616aa0 1073
3fa83edf
DM		 1074 return $ruleset->{$chain} ? 1 : undef;
1075}
3a616aa0 1076
3fa83edf
DM		 1077sub ruleset_addrule {
1078 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1079
3fa83edf 1080 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1081
3fa83edf
DM		 1082 push @{$ruleset->{$chain}}, "-A $chain $rule";
1083}
3a616aa0 1084
3fa83edf
DM		 1085sub ruleset_insertrule {
1086 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1087
3fa83edf 1088 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1089
3fa83edf
DM		 1090 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1091}
3a616aa0 1092
782c4cde
DM		 1093sub get_log_rule_base {
1094 my ($chain, $vmid, $msg, $loglevel) = @_;
1095
1096 die "internal error - no log level" if !defined($loglevel);
1097
1098 $vmid = 0 if !defined($vmid);
1099
1100 # Note: we use special format for prefix to pass further
1101 # info to log daemon (VMID, LOGVELEL and CHAIN)
1102
1103 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1104}
1105
1106sub ruleset_addlog {
1107 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1108
1109 return if !defined($loglevel);
1110
1111 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1112
1113 $logrule = "$rule $logrule" if defined($rule);
1114
1115 ruleset_addrule($ruleset, $chain, $logrule)
1116}
1117
3fa83edf 1118sub generate_bridge_chains {
530c005e
DM		 1119 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1120
1121 my $options = $hostfw_conf->{options} || {};
1122
1123 die "error: detected direct route to bridge '$bridge'\n"
1124 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 1125
5927497d
DM		 1126 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1127 ruleset_create_chain($ruleset, "$bridge-FW");
3cc81077
DM		 1128 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1129 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
3fa83edf 1130 }
3a616aa0 1131
3fa83edf
DM		 1132 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1133 ruleset_create_chain($ruleset, "$bridge-OUT");
3cc81077
DM		 1134 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1135 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 1136 }
1137
1138 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1139 ruleset_create_chain($ruleset, "$bridge-IN");
3cc81077 1140 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
fdb0bf20 1141 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d 1142 # accept traffic to unmanaged bridge ports
3cc81077 1143 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 1144 }
1145}
3a616aa0 1146
ead850e8 1147sub ruleset_add_chain_policy {
782c4cde 1148 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 1149
1150 if ($policy eq 'ACCEPT') {
1151
1152 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1153 { ACCEPT => $accept_action});
1154
1155 } elsif ($policy eq 'DROP') {
1156
1157 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1158
782c4cde 1159 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1160
1161 ruleset_addrule($ruleset, $chain, "-j DROP");
1162 } elsif ($policy eq 'REJECT') {
1163 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1164
782c4cde 1165 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1166
1167 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1168 } else {
1169 # should not happen
1170 die "internal error: unknown policy '$policy'";
1171 }
1172}
1173
9e15114a
DM		 1174sub ruleset_create_vm_chain {
1175 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 1176
9e15114a 1177 ruleset_create_chain($ruleset, $chain);
b47ecc88 1178 my $accept = generate_nfqueue($options);
3a616aa0 1179
bee633ab 1180 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 1181 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM		 1182 }
1183
ce15d90b 1184 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 1185 if ($direction eq 'OUT') {
0f168d7b
DM		 1186 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1187 proto => 'udp', sport => 68, dport => 67 });
76a2d1e7 1188 } else {
0f168d7b
DM		 1189 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1190 proto => 'udp', sport => 67, dport => 68 });
76a2d1e7 1191 }
ce15d90b
DM		 1192 }
1193
bee633ab 1194 if ($options->{tcpflags}) {
9e15114a 1195 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM		 1196 }
1197
9e15114a 1198 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
b47ecc88
AD		 1199 if($direction eq 'OUT'){
1200 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
3a616aa0 1201
b47ecc88
AD		 1202 }else{
1203 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1204 }
b21aca2c
DM		 1205 if ($direction eq 'OUT') {
1206 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 1207 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 1208 }
9e15114a 1209 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 1210 }
b47ecc88
AD		 1211
1212
9e15114a
DM		 1213}
1214
1215sub ruleset_generate_vm_rules {
fca39c2c 1216 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
9e15114a
DM		 1217
1218 my $lc_direction = lc($direction);
c29f55c9 1219
92e976b3
DM		 1220 foreach my $rule (@$rules) {
1221 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1222 next if !$rule->{enable};
92e976b3
DM		 1223 if ($rule->{type} eq 'group') {
1224 my $group_chain = "GROUP-$rule->{action}-$direction";
1225 if(!ruleset_chain_exist($ruleset, $group_chain)){
fca39c2c 1226 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
92e976b3 1227 }
9e15114a 1228 ruleset_addrule($ruleset, $chain, "-j $group_chain");
b47ecc88
AD		 1229 if ($direction eq 'OUT'){
1230 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1231 }else{
1232 my $accept = generate_nfqueue($options);
1233 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1234 }
1235
92e976b3
DM		 1236 } else {
1237 next if $rule->{type} ne $lc_direction;
1238 if ($direction eq 'OUT') {
9e15114a 1239 ruleset_generate_rule($ruleset, $chain, $rule,
92e976b3 1240 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 1241 } else {
b47ecc88
AD		 1242 my $accept = generate_nfqueue($options);
1243 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" });
3a616aa0 1244 }
4e6112f9 1245 }
3a616aa0 1246 }
9e15114a
DM		 1247}
1248
b47ecc88
AD		 1249sub generate_nfqueue {
1250 my ($options) = @_;
1251
1252 my $action = "";
1253 if($options->{ips}){
1254 $action = "NFQUEUE";
1255 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1256 if(defined($3) && defined($1)) {
1257 $action .= " --queue-balance $1:$3";
1258 }elsif (defined($1)) {
1259 $action .= " --queue-num $1";
1260 }
1261 }
1262 $action .= " --queue-bypass";
1263 }else{
1264 $action = "ACCEPT";
1265 }
1266
1267 return $action;
1268}
1269
da6fc60b
AD		 1270sub ruleset_generate_vm_ipsrules {
1271 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1272
1273 if ($options->{ips} && $direction eq 'IN') {
1274 my $nfqueue = generate_nfqueue($options);
1275
1276 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1277 ruleset_create_chain($ruleset, "PVEFW-IPS");
1278 }
1279
1280 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1281 ruleset_create_chain($ruleset, "$bridge-IPS");
1282 ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1283 }
1284
1285 ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1286 }
1287}
1288
9e15114a 1289sub generate_venet_rules_direction {
fca39c2c 1290 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
9e15114a 1291
5176619e 1292 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM		 1293
1294 my $lc_direction = lc($direction);
1295
1296 my $rules = $vmfw_conf->{rules};
1297
1298 my $options = $vmfw_conf->{options};
1299 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1300
1301 my $chain = "venet0-$vmid-$direction";
1302
1303 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1304
fca39c2c 1305 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
9e15114a
DM		 1306
1307 # implement policy
1308 my $policy;
1309
1310 if ($direction eq 'OUT') {
1311 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1312 } else {
1313 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1314 }
1315
b47ecc88
AD		 1316 my $accept = generate_nfqueue($options);
1317 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1318 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1319
38485daa 1320 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM		 1321 if ($direction eq 'OUT') {
1322 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1323 action => $chain,
1324 source => $ip,
1325 iface_in => 'venet0'});
38485daa
DM		 1326
1327 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1328 action => $chain,
1329 source => $ip,
1330 iface_in => 'venet0'});
eba0fb64
DM		 1331 } else {
1332 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1333 action => $chain,
1334 dest => $ip,
1335 iface_out => 'venet0'});
38485daa
DM		 1336
1337 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1338 action => $chain,
1339 dest => $ip,
1340 iface_out => 'venet0'});
eba0fb64 1341 }
9e15114a
DM		 1342}
1343
1344sub generate_tap_rules_direction {
fca39c2c 1345 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
9e15114a
DM		 1346
1347 my $lc_direction = lc($direction);
1348
1349 my $rules = $vmfw_conf->{rules};
1350
1351 my $options = $vmfw_conf->{options};
1352 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1353
1354 my $tapchain = "$iface-$direction";
1355
1356 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1357
fca39c2c 1358 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
3a616aa0 1359
da6fc60b
AD		 1360 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1361
ccae0b50
DM		 1362 # implement policy
1363 my $policy;
1364
1365 if ($direction eq 'OUT') {
72f63fde 1366 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1367 } else {
72f63fde 1368 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1369 }
1370
b47ecc88
AD		 1371 my $accept = generate_nfqueue($options);
1372 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1373 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1374
3fa83edf 1375 # plug the tap chain to bridge chain
3cc81077
DM		 1376 if ($direction eq 'IN') {
1377 ruleset_insertrule($ruleset, "$bridge-IN",
1378 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1379 } else {
1380 ruleset_insertrule($ruleset, "$bridge-OUT",
1381 "-m physdev --physdev-in $iface -j $tapchain");
1382 }
3a616aa0
AD		 1383}
1384
d18c1e2b 1385sub enable_host_firewall {
fca39c2c 1386 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
0bd5f137 1387
51bae274 1388 # fixme: allow security groups
0bd5f137 1389
92e976b3
DM		 1390 my $options = $hostfw_conf->{options};
1391 my $rules = $hostfw_conf->{rules};
178a63be 1392
3fa83edf 1393 # host inbound firewall
dec84fcd
DM		 1394 my $chain = "PVEFW-HOST-IN";
1395 ruleset_create_chain($ruleset, $chain);
0bd5f137 1396
178a63be
DM		 1397 my $loglevel = get_option_log_level($options, "log_level_in");
1398
4ac863a6
DM		 1399 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1400 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1401 }
1402
fb424a00
DM		 1403 if ($options->{tcpflags}) {
1404 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1405 }
1406
7fab95bc
DM		 1407 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1408 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1409 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1410 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1411 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1412 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1413
23e888f8
DM		 1414 # we use RETURN because we need to check also tap rules
1415 my $accept_action = 'RETURN';
1416
92e976b3
DM		 1417 foreach my $rule (@$rules) {
1418 next if $rule->{type} ne 'in';
23e888f8 1419 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1420 }
1421
23e888f8 1422 # implement input policy
72f63fde 1423 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1424 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1425
3fa83edf 1426 # host outbound firewall
aadd745e 1427 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1428 ruleset_create_chain($ruleset, $chain);
1429
178a63be
DM		 1430 $loglevel = get_option_log_level($options, "log_level_out");
1431
7fab95bc
DM		 1432 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1433 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1434 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1435 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1436 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1437 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1438
23e888f8
DM		 1439 # we use RETURN because we may want to check other thigs later
1440 $accept_action = 'RETURN';
1441
92e976b3
DM		 1442 foreach my $rule (@$rules) {
1443 next if $rule->{type} ne 'out';
23e888f8 1444 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1445 }
1446
23e888f8 1447 # implement output policy
72f63fde 1448 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1449 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1450
dec84fcd
DM		 1451 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1452 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1453}
1454
1455sub generate_group_rules {
fca39c2c 1456 my ($ruleset, $cluster_conf, $group) = @_;
c6f5cc88 1457 die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
9d31b418 1458
c6f5cc88 1459 my $rules = $cluster_conf->{groups}->{$group};
6158271d 1460
3fa83edf 1461 my $chain = "GROUP-${group}-IN";
9d31b418 1462
3fa83edf 1463 ruleset_create_chain($ruleset, $chain);
b47ecc88 1464 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1465
92e976b3
DM		 1466 foreach my $rule (@$rules) {
1467 next if $rule->{type} ne 'in';
b47ecc88 1468 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
9d31b418
AD		 1469 }
1470
3fa83edf 1471 $chain = "GROUP-${group}-OUT";
9d31b418 1472
3fa83edf 1473 ruleset_create_chain($ruleset, $chain);
4e6112f9 1474 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1475
92e976b3
DM		 1476 foreach my $rule (@$rules) {
1477 next if $rule->{type} ne 'out';
1478 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1479 # check also other tap rules later
1480 ruleset_generate_rule($ruleset, $chain, $rule,
1481 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1482 }
9d31b418
AD		 1483}
1484
51bae274
DM		 1485my $MAX_NETS = 32;
1486my $valid_netdev_names = {};
1487for (my $i = 0; $i < $MAX_NETS; $i++) {
1488 $valid_netdev_names->{"net$i"} = 1;
1489}
5e1267a5 1490
51bae274
DM		 1491sub parse_fw_rule {
1492 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1493
92e976b3 1494 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1495
11bac5c2 1496 # we can add single line comments to the end of the rule
30c1ae52 1497 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM		 1498
1499 # we can disable a rule when prefixed with '|'
ea9e5116
DM		 1500 my $enable = 1;
1501
1502 $enable = 0 if $line =~ s/^\|//;
51bae274
DM		 1503
1504 my @data = split(/\s+/, $line);
92e976b3 1505 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1506
1507 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1508
1509 if ($need_iface) {
92e976b3 1510 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1511 } else {
92e976b3 1512 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1513 }
1514
92e976b3 1515 die "incomplete rule\n" if ! ($type && $action);
51bae274 1516
961b4928 1517 my $macro;
961b4928 1518
92e976b3
DM		 1519 $type = lc($type);
1520
1521 if ($type eq 'in' || $type eq 'out') {
1522 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1523 # OK
1524 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
e5076eee
DM		 1525 $action = $2;
1526 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1527 die "unknown macro '$1'\n" if !$preferred_name;
1528 $macro = $preferred_name;
92e976b3
DM		 1529 } else {
1530 die "unknown action '$action'\n";
1531 }
1532 } elsif ($type eq 'group') {
1533 die "wrong number of rule elements\n" if scalar(@data) != 3;
1534 die "groups disabled\n" if !$allow_groups;
1535
1536 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1537 } else {
92e976b3 1538 die "unknown rule type '$type'\n";
51bae274
DM		 1539 }
1540
1541 if ($need_iface) {
1542 $iface = undef if $iface && $iface eq '-';
51bae274
DM		 1543 }
1544
1545 $proto = undef if $proto && $proto eq '-';
54cd19a8 1546 pve_fw_verify_protocol_spec($proto) if $proto;
51bae274
DM		 1547
1548 $source = undef if $source && $source eq '-';
1549 $dest = undef if $dest && $dest eq '-';
1550
1551 $dport = undef if $dport && $dport eq '-';
1552 $sport = undef if $sport && $sport eq '-';
1553
e5076eee
DM		 1554 parse_port_name_number_or_range($dport) if defined($dport);
1555 parse_port_name_number_or_range($sport) if defined($sport);
1556
1557 parse_address_list($source) if $source;
1558 parse_address_list($dest) if $dest;
51bae274 1559
e5076eee 1560 return {
92e976b3 1561 type => $type,
ea9e5116 1562 enable => $enable,
11bac5c2 1563 comment => $comment,
51bae274 1564 action => $action,
e5076eee 1565 macro => $macro,
51bae274
DM		 1566 iface => $iface,
1567 source => $source,
1568 dest => $dest,
51bae274
DM		 1569 proto => $proto,
1570 dport => $dport,
1571 sport => $sport,
51bae274
DM		 1572 };
1573}
1574
2d404ffc 1575sub parse_vmfw_option {
85c6eaed
DM		 1576 my ($line) = @_;
1577
1578 my ($opt, $value);
1579
178a63be
DM		 1580 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1581
b47ecc88 1582 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1583 $opt = lc($1);
1584 $value = int($2);
178a63be
DM		 1585 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1586 $opt = lc($1);
1587 $value = $2 ? lc($3) : '';
72f63fde 1588 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1589 $opt = lc($1);
1590 $value = uc($3);
b47ecc88
AD		 1591 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1592 $opt = lc($1);
1593 $value = $2;
9c6b6efd 1594 } else {
85c6eaed
DM		 1595 chomp $line;
1596 die "can't parse option '$line'\n"
1597 }
1598
1599 return ($opt, $value);
1600}
1601
2d404ffc
DM		 1602sub parse_hostfw_option {
1603 my ($line) = @_;
1604
1605 my ($opt, $value);
1606
1607 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1608
cc10e5d7 1609 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1610 $opt = lc($1);
1611 $value = int($2);
178a63be 1612 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1613 $opt = lc($1);
1614 $value = $2 ? lc($3) : '';
72f63fde 1615 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1616 $opt = lc($1);
1617 $value = uc($3);
490cdead
DM		 1618 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1619 $opt = lc($1);
1620 $value = int($2);
2d404ffc
DM		 1621 } else {
1622 chomp $line;
1623 die "can't parse option '$line'\n"
1624 }
1625
1626 return ($opt, $value);
1627}
1628
c6f5cc88
DM		 1629sub parse_clusterfw_option {
1630 my ($line) = @_;
1631
1632 my ($opt, $value);
1633
1634 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1635 $opt = lc($1);
1636 $value = int($2);
1637 } else {
1638 chomp $line;
1639 die "can't parse option '$line'\n"
1640 }
1641
1642 return ($opt, $value);
1643}
1644
51bae274
DM		 1645sub parse_vm_fw_rules {
1646 my ($filename, $fh) = @_;
1647
92e976b3 1648 my $res = { rules => [], options => {}};
51bae274
DM		 1649
1650 my $section;
1651
e7b35711
DM		 1652 my $digest = Digest::SHA->new('sha1');
1653
5e1267a5 1654 while (defined(my $line = <$fh>)) {
e7b35711
DM		 1655 $digest->add($line);
1656
5e1267a5
DM		 1657 next if $line =~ m/^#/;
1658 next if $line =~ m/^\s*$/;
1659
961b4928
DM		 1660 my $linenr = $fh->input_line_number();
1661 my $prefix = "$filename (line $linenr)";
1662
85c6eaed 1663 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1664 $section = lc($1);
85c6eaed 1665 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1666 next;
1667 }
51bae274 1668 if (!$section) {
961b4928 1669 warn "$prefix: skip line - no section";
5e1267a5
DM		 1670 next;
1671 }
1672
85c6eaed
DM		 1673 next if !$res->{$section}; # skip undefined section
1674
1675 if ($section eq 'options') {
6158271d 1676 eval {
2d404ffc 1677 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1678 $res->{options}->{$opt} = $value;
1679 };
1680 warn "$prefix: $@" if $@;
1681 next;
1682 }
1683
e5076eee
DM		 1684 my $rule;
1685 eval { $rule = parse_fw_rule($line, 1, 1); };
51bae274 1686 if (my $err = $@) {
961b4928 1687 warn "$prefix: $err";
5e1267a5
DM		 1688 next;
1689 }
1690
e5076eee 1691 push @{$res->{$section}}, $rule;
51bae274
DM		 1692 }
1693
e7b35711
DM		 1694 $res->{digest} = $digest->b64digest;
1695
51bae274
DM		 1696 return $res;
1697}
1698
1699sub parse_host_fw_rules {
1700 my ($filename, $fh) = @_;
1701
92e976b3 1702 my $res = { rules => [], options => {}};
51bae274
DM		 1703
1704 my $section;
1705
8b27beb9
DM		 1706 my $digest = Digest::SHA->new('sha1');
1707
51bae274 1708 while (defined(my $line = <$fh>)) {
8b27beb9
DM		 1709 $digest->add($line);
1710
51bae274
DM		 1711 next if $line =~ m/^#/;
1712 next if $line =~ m/^\s*$/;
1713
961b4928
DM		 1714 my $linenr = $fh->input_line_number();
1715 my $prefix = "$filename (line $linenr)";
1716
2d404ffc 1717 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1718 $section = lc($1);
2d404ffc 1719 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1720 next;
1721 }
51bae274 1722 if (!$section) {
961b4928 1723 warn "$prefix: skip line - no section";
5e1267a5
DM		 1724 next;
1725 }
1726
2d404ffc
DM		 1727 next if !$res->{$section}; # skip undefined section
1728
1729 if ($section eq 'options') {
1730 eval {
2d404ffc
DM		 1731 my ($opt, $value) = parse_hostfw_option($line);
1732 $res->{options}->{$opt} = $value;
1733 };
1734 warn "$prefix: $@" if $@;
1735 next;
1736 }
1737
e5076eee
DM		 1738 my $rule;
1739 eval { $rule = parse_fw_rule($line, 1, 1); };
ecbea048 1740 if (my $err = $@) {
961b4928 1741 warn "$prefix: $err";
ecbea048 1742 next;
ecbea048 1743 }
e5076eee
DM		 1744
1745 push @{$res->{$section}}, $rule;
51bae274 1746 }
ecbea048 1747
8b27beb9
DM		 1748 $res->{digest} = $digest->b64digest;
1749
51bae274
DM		 1750 return $res;
1751}
4cdbb3b7 1752
c6f5cc88 1753sub parse_cluster_fw_rules {
51bae274 1754 my ($filename, $fh) = @_;
5e1267a5 1755
51bae274
DM		 1756 my $section;
1757 my $group;
1758
c4a2e5ae 1759 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
6158271d 1760
d1c53b3e
DM		 1761 my $digest = Digest::SHA->new('sha1');
1762
51bae274 1763 while (defined(my $line = <$fh>)) {
d1c53b3e
DM		 1764 $digest->add($line);
1765
51bae274
DM		 1766 next if $line =~ m/^#/;
1767 next if $line =~ m/^\s*$/;
1768
961b4928
DM		 1769 my $linenr = $fh->input_line_number();
1770 my $prefix = "$filename (line $linenr)";
1771
c6f5cc88
DM		 1772 if ($line =~ m/^\[options\]$/i) {
1773 $section = 'options';
1774 next;
1775 }
1776
92e976b3 1777 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
c6f5cc88 1778 $section = 'groups';
92e976b3 1779 $group = lc($1);
51bae274
DM		 1780 next;
1781 }
34cdedfa 1782
c6f5cc88
DM		 1783 if ($line =~ m/^\[rules\]$/i) {
1784 $section = 'rules';
1785 next;
1786 }
1787
34cdedfa
AD		 1788 if ($line =~ m/^\[netgroup\s+(\S+)\]\s*$/i) {
1789 $section = 'ipset';
1790 $group = lc($1);
34cdedfa
AD		 1791 next;
1792 }
1793
c6f5cc88 1794 if (!$section) {
961b4928 1795 warn "$prefix: skip line - no section";
51bae274
DM		 1796 next;
1797 }
1798
c6f5cc88
DM		 1799 if ($section eq 'options') {
1800 eval {
1801 my ($opt, $value) = parse_clusterfw_option($line);
1802 $res->{options}->{$opt} = $value;
1803 };
1804 warn "$prefix: $@" if $@;
1805 } elsif ($section eq 'rules') {
1806 my $rule;
1807 eval { $rule = parse_fw_rule($line, 1, 1); };
1808 if (my $err = $@) {
1809 warn "$prefix: $err";
1810 next;
1811 }
1812 push @{$res->{$section}}, $rule;
1813 } elsif ($section eq 'groups') {
34cdedfa
AD		 1814 my $rule;
1815 eval { $rule = parse_fw_rule($line, 0, 0); };
1816 if (my $err = $@) {
1817 warn "$prefix: $err";
1818 next;
1819 }
3f95d14a 1820 push @{$res->{$section}->{$group}}, $rule;
3f95d14a
DM		 1821 } elsif ($section eq 'ipset') {
1822 chomp $line;
2a052ee3
AD		 1823 $line =~ m/^(\!)?(\s)?((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1824 my $nomatch = $1;
1825 my $ip = $3;
1826
1827 if(!$ip){
34cdedfa
AD		 1828 warn "$prefix: $line is not an valid ip address";
1829 next;
1830 }
2a052ee3
AD		 1831 if (!Net::IP->new($ip)) {
1832 warn "$prefix: $line is not an valid ip address";
1833 next;
1834 }
1835 $ip .= " nomatch" if $nomatch;
1836
1837 push @{$res->{$section}->{$group}}, $ip;
51bae274 1838 }
5e1267a5
DM		 1839 }
1840
d1c53b3e 1841 $res->{digest} = $digest->b64digest;
5e1267a5
DM		 1842 return $res;
1843}
1844
06320eb0
DM		 1845sub run_locked {
1846 my ($code, @param) = @_;
1847
1848 my $timeout = 10;
1849
1850 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1851
1852 die $@ if $@;
1853
1854 return $res;
1855}
1856
5e1267a5
DM		 1857sub read_local_vm_config {
1858
1859 my $openvz = {};
5e1267a5
DM		 1860 my $qemu = {};
1861
c8301d63 1862 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1863
c8301d63
DM		 1864 my $vmlist = PVE::Cluster::get_vmlist();
1865 return $vmdata if !$vmlist || !$vmlist->{ids};
1866 my $ids = $vmlist->{ids};
1867
1868 foreach my $vmid (keys %$ids) {
1869 next if !$vmid; # skip VE0
1870 my $d = $ids->{$vmid};
1871 next if !$d->{node} || $d->{node} ne $nodename;
1872 next if !$d->{type};
1873 if ($d->{type} eq 'openvz') {
d9fee004
DM		 1874 if ($have_pve_manager) {
1875 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1876 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1877 $openvz->{$vmid} = $conf;
1878 }
c8301d63
DM		 1879 }
1880 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM		 1881 if ($have_qemu_server) {
1882 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1883 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1884 $qemu->{$vmid} = $conf;
1885 }
c8301d63 1886 }
5e1267a5
DM		 1887 }
1888 }
d9fee004 1889
5e1267a5
DM		 1890 return $vmdata;
1891};
1892
e7b35711
DM		 1893sub load_vmfw_conf {
1894 my ($vmid) = @_;
1895
1896 my $vmfw_conf = {};
1897
1898 my $filename = "/etc/pve/firewall/$vmid.fw";
1899 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1900 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1901 }
1902
1903 return $vmfw_conf;
1904}
1905
6fc63ffd 1906sub read_vm_firewall_configs {
5e1267a5 1907 my ($vmdata) = @_;
6fc63ffd 1908 my $vmfw_configs = {};
c8301d63 1909
5e1267a5 1910 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
e7b35711
DM		 1911 my $vmfw_conf = load_vmfw_conf($vmid);
1912 next if !$vmfw_conf->{options}; # skip if file does not exists
1913 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM		 1914 }
1915
6fc63ffd 1916 return $vmfw_configs;
5e1267a5
DM		 1917}
1918
2d404ffc
DM		 1919sub get_option_log_level {
1920 my ($options, $k) = @_;
1921
1922 my $v = $options->{$k};
178a63be 1923 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1924
1925 return undef if $v eq '' || $v eq 'nolog';
1926
1927 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1928
1929 return $v if ($v >= 0) && ($v <= 7);
1930
1931 warn "unknown log level ($k = '$v')\n";
1932
1933 return undef;
1934}
1935
d8f2505e 1936sub generate_std_chains {
2d404ffc
DM		 1937 my ($ruleset, $options) = @_;
1938
1939 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1940
1941 # same as shorewall smurflog.
782c4cde
DM		 1942 my $chain = 'PVEFW-smurflog';
1943
1944 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1945 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 1946
1947 # same as shorewall logflags action.
1948 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM		 1949 $chain = 'PVEFW-logflags';
1950 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1951 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1952 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 1953
1954 foreach my $chain (keys %$pve_std_chains) {
1955 ruleset_create_chain($ruleset, $chain);
1956 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1957 if (ref($rule)) {
1958 ruleset_generate_rule($ruleset, $chain, $rule);
1959 } else {
1960 ruleset_addrule($ruleset, $chain, $rule);
1961 }
1962 }
1963 }
1964}
1965
34cdedfa 1966sub generate_ipset_chains {
dd7a13fd 1967 my ($ipset_ruleset, $fw_conf) = @_;
34cdedfa 1968
dd7a13fd
DM		 1969 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
1970 generate_ipset($ipset_ruleset, $ipset, $fw_conf->{ipset}->{$ipset});
34cdedfa
AD		 1971 }
1972}
1973
1974sub generate_ipset {
1975 my ($ipset_ruleset, $name, $options) = @_;
1976
dd7a13fd
DM		 1977 my $hashsize = scalar(@$options);
1978 if ($hashsize <= 64) {
2a052ee3 1979 $hashsize = 64;
dd7a13fd 1980 } else {
2a052ee3
AD		 1981 $hashsize = round_powerof2($hashsize);
1982 }
1983
dd7a13fd 1984 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
34cdedfa 1985
dd7a13fd 1986 foreach my $ip (@$options) {
34cdedfa
AD		 1987 push @{$ipset_ruleset->{$name}}, "add $name $ip";
1988 }
2a052ee3
AD		 1989}
1990
1991sub round_powerof2 {
dd7a13fd 1992 my ($int) = @_;
2a052ee3 1993
dd7a13fd
DM		 1994 $int--;
1995 $int |= $int >> $_ foreach (1,2,4,8,16);
1996 return ++$int;
34cdedfa
AD		 1997}
1998
6b9f68a2
DM		 1999sub save_pvefw_status {
2000 my ($status) = @_;
2001
2002 die "unknown status '$status' - internal error"
2003 if $status !~ m/^(stopped|active)$/;
2004
2005 mkdir dirname($pve_fw_status_filename);
2006 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2007}
2008
2009sub read_pvefw_status {
2010
2011 my $status = 'unknown';
2012
2013 return 'stopped' if ! -f $pve_fw_status_filename;
2014
2015 eval {
2016 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2017 };
2018 warn $@ if $@;
2019
2020 return $status;
2021}
2022
530c005e
DM		 2023# fixme: move to pve-common PVE::ProcFSTools
2024sub read_proc_net_route {
2025 my $filename = "/proc/net/route";
2026
2027 my $res = {};
2028
2029 my $fh = IO::File->new ($filename, "r");
2030 return $res if !$fh;
2031
2032 my $int_to_quad = sub {
2033 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2034 };
2035
2036 while (defined(my $line = <$fh>)) {
2037 next if $line =~/^Iface\s+Destination/; # skip head
2038 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2039 push @{$res->{$iface}}, {
2040 dest => &$int_to_quad(hex($dest)),
2041 gateway => &$int_to_quad(hex($gateway)),
2042 mask => &$int_to_quad(hex($mask)),
2043 metric => $metric,
2044 mtu => $mtu,
2045 };
2046 }
2047
2048 return $res;
2049}
2050
fca39c2c 2051sub load_clusterfw_conf {
530c005e 2052
fca39c2c
DM		 2053 my $cluster_conf = {};
2054 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
c6f5cc88 2055 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
51bae274 2056 }
5e1267a5 2057
fca39c2c 2058 return $cluster_conf;
e5d76bde
DM		 2059}
2060
c6f5cc88
DM		 2061my $rules_to_conf = sub {
2062 my ($rules, $need_iface) = @_;
2063
2064 my $raw = '';
2065
2066 foreach my $rule (@$rules) {
2067 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2068 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2069 $raw .= uc($rule->{type});
2070 $raw .= " " . $rule->{action};
2071 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2072 $raw .= " " . ($rule->{source} || '-');
2073 $raw .= " " . ($rule->{dest} || '-');
2074 $raw .= " " . ($rule->{proto} || '-');
2075 $raw .= " " . ($rule->{dport} || '-');
2076 $raw .= " " . ($rule->{sport} || '-');
2077 $raw .= " # " . encode('utf8', $rule->{comment})
2078 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2079 $raw .= "\n";
2080 } else {
2081 die "implement me '$rule->{type}'";
2082 }
2083 }
2084
2085 return $raw;
2086};
2087
fca39c2c
DM		 2088sub save_clusterfw_conf {
2089 my ($cluster_conf) = @_;
9c7e0858
DM		 2090
2091 my $raw = '';
9c7e0858 2092
c6f5cc88
DM		 2093 my $options = $cluster_conf->{options};
2094 if (scalar(keys %$options)) {
2095 $raw .= "[OPTIONS]\n\n";
2096 foreach my $opt (keys %$options) {
2097 $raw .= "$opt: $options->{$opt}\n";
9c7e0858 2098 }
c6f5cc88
DM		 2099 $raw .= "\n";
2100 }
9c7e0858 2101
c6f5cc88
DM		 2102 # fixme: save ipset
2103
2104 my $rules = $cluster_conf->{rules};
2105 if (scalar(@$rules)) {
2106 $raw .= "[RULES]\n\n";
2107 $raw .= &$rules_to_conf($rules, 1);
2108 $raw .= "\n";
2109 }
2110
2111 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2112 my $rules = $cluster_conf->{groups}->{$group};
2113 $raw .= "[group $group]\n\n";
2114 $raw .= &$rules_to_conf($rules, 0);
9c7e0858
DM		 2115 $raw .= "\n";
2116 }
2117
fca39c2c 2118 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM		 2119}
2120
8b27beb9
DM		 2121sub load_hostfw_conf {
2122
2123 my $hostfw_conf = {};
2124 my $filename = "/etc/pve/local/host.fw";
2125 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2126 $hostfw_conf = parse_host_fw_rules($filename, $fh);
2127 }
2128 return $hostfw_conf;
2129}
2130
e5d76bde
DM		 2131sub compile {
2132 my $vmdata = read_local_vm_config();
2133 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2134
2135 my $routing_table = read_proc_net_route();
2136
fca39c2c 2137 my $cluster_conf = load_clusterfw_conf();
e5d76bde 2138
34cdedfa 2139 my $ipset_ruleset = {};
fca39c2c 2140 generate_ipset_chains($ipset_ruleset, $cluster_conf);
34cdedfa 2141
3fa83edf
DM		 2142 my $ruleset = {};
2143
dec84fcd
DM		 2144 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2145 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2146
fadb13dd 2147 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 2148
8b27beb9
DM		 2149 my $hostfw_conf = load_hostfw_conf();
2150 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2151
92e976b3 2152 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2153
6d2ab017 2154 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2155
fca39c2c 2156 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
3fa83edf 2157
6158271d 2158 # generate firewall rules for QEMU VMs
3fa83edf
DM		 2159 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2160 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 2161 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 2162 next if !$vmfw_conf;
2163 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 2164
2165 foreach my $netid (keys %$conf) {
2166 next if $netid !~ m/^net(\d+)$/;
2167 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2168 next if !$net;
2169 my $iface = "tap${vmid}i$1";
5e1267a5 2170
3fa83edf
DM		 2171 my $bridge = $net->{bridge};
2172 next if !$bridge; # fixme: ?
2173
2174 $bridge .= "v$net->{tag}" if $net->{tag};
2175
530c005e 2176 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 2177
c29f55c9 2178 my $macaddr = $net->{macaddr};
fca39c2c 2179 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2180 $vmfw_conf, $vmid, $bridge, 'IN');
fca39c2c 2181 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2182 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM		 2183 }
2184 }
c8301d63
DM		 2185
2186 # generate firewall rules for OpenVZ containers
2187 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2188 my $conf = $vmdata->{openvz}->{$vmid};
2189
2190 my $vmfw_conf = $vmfw_configs->{$vmid};
2191 next if !$vmfw_conf;
2192 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2193
2194 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2195 my $ip = $conf->{ip_address}->{value};
fca39c2c
DM		 2196 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2197 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 2198 }
2199
2200 if ($conf->{netif} && $conf->{netif}->{value}) {
2201 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 2202 foreach my $netid (keys %$netif) {
2203 my $d = $netif->{$netid};
2204 my $bridge = $d->{bridge};
2205 if (!$bridge) {
2206 warn "no bridge device for CT $vmid iface '$netid'\n";
2207 next; # fixme?
2208 }
530c005e
DM		 2209
2210 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2211
12d0f130 2212 my $macaddr = $d->{mac};
c8301d63 2213 my $iface = $d->{host_ifname};
fca39c2c 2214 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2215 $vmfw_conf, $vmid, $bridge, 'IN');
fca39c2c 2216 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2217 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM		 2218 }
2219 }
2220 }
c0413e35 2221
cc10e5d7 2222 if($hostfw_options->{optimize}){
da6fc60b 2223
e9d9a73e 2224 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
da6fc60b 2225 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
cc10e5d7
AD		 2226 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2227 }
2228
eba0fb64
DM		 2229 # fixme: what log level should we use here?
2230 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2231
c98c037d
DM		 2232 # fixme: should we really block inter-bridge traffic?
2233
2234 # always allow traffic from containers?
2235 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2236
eba0fb64
DM		 2237 # disable interbridge routing
2238 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2239 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
782c4cde
DM		 2240 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2241 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
eba0fb64
DM		 2242 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2243 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2244
34cdedfa 2245 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
3fa83edf
DM		 2246}
2247
2248sub get_ruleset_status {
4bd0a9c4 2249 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM		 2250
2251 my $statushash = {};
2252
2253 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 2254 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 2255
3fa83edf
DM		 2256 $statushash->{$chain}->{sig} = $sig;
2257
2258 my $oldsig = $active_chains->{$chain};
2259 if (!defined($oldsig)) {
2260 $statushash->{$chain}->{action} = 'create';
2261 } else {
2262 if ($oldsig eq $sig) {
2263 $statushash->{$chain}->{action} = 'exists';
2264 } else {
2265 $statushash->{$chain}->{action} = 'update';
2266 }
2267 }
2268 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2269 foreach my $cmd (@{$ruleset->{$chain}}) {
2270 print "\t$cmd\n" if $verbose;
2271 }
2272 }
2273
2274 foreach my $chain (sort keys %$active_chains) {
2275 if (!defined($ruleset->{$chain})) {
2276 my $sig = $active_chains->{$chain};
2277 $statushash->{$chain}->{action} = 'delete';
2278 $statushash->{$chain}->{sig} = $sig;
2279 print "delete $chain ($sig)\n" if $verbose;
2280 }
6158271d 2281 }
2a052ee3 2282
3fa83edf
DM		 2283 return $statushash;
2284}
2285
3fa83edf
DM		 2286sub print_sig_rule {
2287 my ($chain, $sig) = @_;
2288
09d5f68e
DM		 2289 # We just use this to store a SHA1 checksum used to detect changes
2290 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 2291}
2292
df7cb349 2293sub get_ruleset_cmdlist {
a84f4d96 2294 my ($ruleset, $verbose) = @_;
3fa83edf 2295
3fa83edf 2296 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
4bd0a9c4
DM		 2297
2298 my ($active_chains, $hooks) = iptables_get_chains();
2299 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM		 2300
2301 # create missing chains first
2302 foreach my $chain (sort keys %$ruleset) {
2303 my $stat = $statushash->{$chain};
2304 die "internal error" if !$stat;
2305 next if $stat->{action} ne 'create';
886aba9c 2306
3fa83edf
DM		 2307 $cmdlist .= ":$chain - [0:0]\n";
2308 }
2309
4bd0a9c4
DM		 2310 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2311 if (!$hooks->{$h}) {
2312 $cmdlist .= "-A $h -j PVEFW-$h\n";
2313 }
3fa83edf
DM		 2314 }
2315
2316 foreach my $chain (sort keys %$ruleset) {
2317 my $stat = $statushash->{$chain};
2318 die "internal error" if !$stat;
2319
2320 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2321 $cmdlist .= "-F $chain\n";
2322 foreach my $cmd (@{$ruleset->{$chain}}) {
2323 $cmdlist .= "$cmd\n";
2324 }
2325 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2326 } elsif ($stat->{action} eq 'delete') {
f5d28682 2327 die "internal error"; # this should not happen
3fa83edf
DM		 2328 } elsif ($stat->{action} eq 'exists') {
2329 # do nothing
2330 } else {
2331 die "internal error - unknown status '$stat->{action}'";
2332 }
2333 }
2334
f5d28682
DM		 2335 foreach my $chain (keys %$statushash) {
2336 next if $statushash->{$chain}->{action} ne 'delete';
2337 $cmdlist .= "-F $chain\n";
2338 }
2339 foreach my $chain (keys %$statushash) {
2340 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 2341 next if $chain eq 'PVEFW-INPUT';
2342 next if $chain eq 'PVEFW-OUTPUT';
2343 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 2344 $cmdlist .= "-X $chain\n";
2345 }
2346
3f95d14a 2347 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 2348
3fa83edf
DM		 2349 $cmdlist .= "COMMIT\n";
2350
3f95d14a 2351 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 2352}
2353
34cdedfa 2354sub get_ipset_cmdlist {
dd7a13fd 2355 my ($ruleset, $verbose) = @_;
34cdedfa
AD		 2356
2357 my $cmdlist = "";
2358
dd7a13fd
DM		 2359 my $delete_cmdlist = "";
2360
4bd0a9c4
DM		 2361 my $active_chains = ipset_get_chains();
2362 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 2363
dd7a13fd
DM		 2364 foreach my $chain (sort keys %$ruleset) {
2365 my $stat = $statushash->{$chain};
2366 die "internal error" if !$stat;
2a052ee3 2367
dd7a13fd
DM		 2368 if ($stat->{action} eq 'create') {
2369 foreach my $cmd (@{$ruleset->{$chain}}) {
34cdedfa
AD		 2370 $cmdlist .= "$cmd\n";
2371 }
dd7a13fd 2372 }
34cdedfa 2373
dd7a13fd
DM		 2374 if ($stat->{action} eq 'update') {
2375 my $chain_swap = $chain."_swap";
2376
2377 foreach my $cmd (@{$ruleset->{$chain}}) {
2378 $cmd =~ s/$chain/$chain_swap/;
2379 $cmdlist .= "$cmd\n";
34cdedfa 2380 }
dd7a13fd
DM		 2381 $cmdlist .= "swap $chain_swap $chain\n";
2382 $cmdlist .= "flush $chain_swap\n";
2383 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 2384 }
34cdedfa 2385
dd7a13fd 2386 }
3f95d14a 2387
dd7a13fd
DM		 2388 foreach my $chain (keys %$statushash) {
2389 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 2390
dd7a13fd
DM		 2391 $delete_cmdlist .= "flush $chain\n";
2392 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 2393 }
2394
dd7a13fd
DM		 2395 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2396
2397 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 2398}
2399
6b9f68a2 2400sub apply_ruleset {
34cdedfa 2401 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM		 2402
2403 enable_bridge_firewall();
2404
edb75ba9
DM		 2405 update_nf_conntrack_max($hostfw_conf);
2406
dd7a13fd 2407 my ($ipset_create_cmdlist, $ipset_delete_cmdlist) = get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
34cdedfa 2408
df7cb349 2409 my $cmdlist = get_ruleset_cmdlist($ruleset, $verbose);
6b9f68a2 2410
2a052ee3
AD		 2411 print $ipset_create_cmdlist if $verbose;
2412
2413 print $ipset_delete_cmdlist if $verbose;
3f95d14a 2414
3fa83edf
DM		 2415 print $cmdlist if $verbose;
2416
2a052ee3 2417 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 2418
3fa83edf
DM		 2419 iptables_restore_cmdlist($cmdlist);
2420
dd7a13fd 2421 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 2422
6158271d 2423 # test: re-read status and check if everything is up to date
4bd0a9c4
DM		 2424 my $active_chains = iptables_get_chains();
2425 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM		 2426
2427 my $errors;
2428 foreach my $chain (sort keys %$ruleset) {
2429 my $stat = $statushash->{$chain};
2430 if ($stat->{action} ne 'exists') {
2431 warn "unable to update chain '$chain'\n";
2432 $errors = 1;
2433 }
2434 }
b6360c3f 2435
3fa83edf 2436 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 2437}
2438
490cdead
DM		 2439sub update_nf_conntrack_max {
2440 my ($hostfw_conf) = @_;
2441
2442 my $max = 65536; # reasonable default
2443
2444 my $options = $hostfw_conf->{options} || {};
2445
2446 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2447 $max = $options->{nf_conntrack_max};
2448 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2449 }
2450
2451 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2452 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2453
2454 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2455
2456 if ($current != $max) {
2457 my $hashsize = int($max/4);
2458 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2459 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2460 }
2461}
2462
c4a2e5ae
DM		 2463sub remove_pvefw_chains {
2464
2465 my ($chash, $hooks) = iptables_get_chains();
2466 my $cmdlist = "*filter\n";
2467
2468 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2469 if ($hooks->{$h}) {
2470 $cmdlist .= "-D $h -j PVEFW-$h\n";
2471 }
2472 }
2473
2474 foreach my $chain (keys %$chash) {
2475 $cmdlist .= "-F $chain\n";
2476 }
2477
2478 foreach my $chain (keys %$chash) {
2479 $cmdlist .= "-X $chain\n";
2480 }
2481 $cmdlist .= "COMMIT\n";
2482
2483 iptables_restore_cmdlist($cmdlist);
2484}
2485
6b9f68a2
DM		 2486sub update {
2487 my ($start, $verbose) = @_;
2488
2489 my $code = sub {
2490 my $status = read_pvefw_status();
2491
3f95d14a 2492 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
490cdead 2493
6b9f68a2
DM		 2494 if ($start || $status eq 'active') {
2495
2496 save_pvefw_status('active') if ($status ne 'active');
2497
34cdedfa 2498 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM		 2499 } else {
2500 print "Firewall not active (status = $status)\n" if $verbose;
2501 }
2502 };
2503
2504 run_locked($code);
2505}
2506
2507
b6360c3f 25081;
Firewall test scripts