implement delete parameter for rule update API
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
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1package PVE::Firewall;
2
3use warnings;
4use strict;
cbb5d6f3 5use POSIX;
b6360c3f 6use Data::Dumper;
09d5f68e 7use Digest::SHA;
c8301d63 8use PVE::INotify;
54cd19a8 9use PVE::JSONSchema qw(get_standard_option);
c8301d63 10use PVE::Cluster;
5f0a912c 11use PVE::ProcFSTools;
f789653a 12use PVE::Tools;
6b9f68a2 13use File::Basename;
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14use File::Path;
15use IO::File;
ecbea048 16use Net::IP;
06320eb0 17use PVE::Tools qw(run_command lock_file);
30c1ae52 18use Encode;
ecbea048 19
63c91681 20my $hostfw_conf_filename = "/etc/pve/local/host.fw";
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21my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
22
cbb5d6f3 23# dynamically include PVE::QemuServer and PVE::OpenVZ
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24# to avoid dependency problems
25my $have_qemu_server;
26eval {
27 require PVE::QemuServer;
28 $have_qemu_server = 1;
29};
30
31my $have_pve_manager;
32eval {
33 require PVE::OpenVZ;
34 $have_pve_manager = 1;
35};
36
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37my $feature_ipset_nomatch = 0;
38eval {
39 my (undef, undef, $release) = POSIX::uname();
40 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
41 my ($major, $minor) = ($1, $2);
42 $feature_ipset_nomatch = 1 if ($major > 3) ||
43 ($major == 3 && $minor >= 7);
44 }
45
46};
47
5e1267a5 48use Data::Dumper;
b6360c3f 49
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50my $nodename = PVE::INotify::nodename();
51
06320eb0 52my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 53my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 54
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55my $default_log_level = 'info';
56
57my $log_level_hash = {
58 debug => 7,
59 info => 6,
60 notice => 5,
61 warning => 4,
62 err => 3,
63 crit => 2,
64 alert => 1,
65 emerg => 0,
66};
67
857f62c8 68# imported/converted from: /usr/share/shorewall/macro.*
961b4928 69my $pve_fw_macros = {
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70 'Amanda' => [
71 { action => 'PARAM', proto => 'udp', dport => '10080' },
72 { action => 'PARAM', proto => 'tcp', dport => '10080' },
73 ],
74 'Auth' => [
75 { action => 'PARAM', proto => 'tcp', dport => '113' },
76 ],
77 'BGP' => [
78 { action => 'PARAM', proto => 'tcp', dport => '179' },
79 ],
80 'BitTorrent' => [
961b4928 81 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
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82 { action => 'PARAM', proto => 'udp', dport => '6881' },
83 ],
84 'BitTorrent32' => [
85 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
86 { action => 'PARAM', proto => 'udp', dport => '6881' },
87 ],
88 'CVS' => [
89 { action => 'PARAM', proto => 'tcp', dport => '2401' },
90 ],
91 'Citrix' => [
92 { action => 'PARAM', proto => 'tcp', dport => '1494' },
93 { action => 'PARAM', proto => 'udp', dport => '1604' },
94 { action => 'PARAM', proto => 'tcp', dport => '2598' },
95 ],
96 'DAAP' => [
97 { action => 'PARAM', proto => 'tcp', dport => '3689' },
98 { action => 'PARAM', proto => 'udp', dport => '3689' },
99 ],
100 'DCC' => [
101 { action => 'PARAM', proto => 'tcp', dport => '6277' },
102 ],
103 'DHCPfwd' => [
104 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
105 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
106 ],
107 'DNS' => [
108 { action => 'PARAM', proto => 'udp', dport => '53' },
109 { action => 'PARAM', proto => 'tcp', dport => '53' },
110 ],
111 'Distcc' => [
112 { action => 'PARAM', proto => 'tcp', dport => '3632' },
113 ],
114 'Edonkey' => [
115 { action => 'PARAM', proto => 'tcp', dport => '4662' },
116 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 117 ],
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118 'FTP' => [
119 { action => 'PARAM', proto => 'tcp', dport => '21' },
120 ],
121 'Finger' => [
122 { action => 'PARAM', proto => 'tcp', dport => '79' },
123 ],
124 'GNUnet' => [
125 { action => 'PARAM', proto => 'tcp', dport => '2086' },
126 { action => 'PARAM', proto => 'udp', dport => '2086' },
127 { action => 'PARAM', proto => 'tcp', dport => '1080' },
128 { action => 'PARAM', proto => 'udp', dport => '1080' },
129 ],
130 'GRE' => [
131 { action => 'PARAM', proto => '47' },
132 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
133 ],
134 'Git' => [
135 { action => 'PARAM', proto => 'tcp', dport => '9418' },
136 ],
137 'Gnutella' => [
138 { action => 'PARAM', proto => 'tcp', dport => '6346' },
139 { action => 'PARAM', proto => 'udp', dport => '6346' },
140 ],
141 'HKP' => [
142 { action => 'PARAM', proto => 'tcp', dport => '11371' },
143 ],
144 'HTTP' => [
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145 { action => 'PARAM', proto => 'tcp', dport => '80' },
146 ],
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147 'HTTPS' => [
148 { action => 'PARAM', proto => 'tcp', dport => '443' },
149 ],
150 'ICPV2' => [
151 { action => 'PARAM', proto => 'udp', dport => '3130' },
152 ],
153 'ICQ' => [
154 { action => 'PARAM', proto => 'tcp', dport => '5190' },
155 ],
156 'IMAP' => [
157 { action => 'PARAM', proto => 'tcp', dport => '143' },
158 ],
159 'IMAPS' => [
160 { action => 'PARAM', proto => 'tcp', dport => '993' },
161 ],
162 'IPIP' => [
163 { action => 'PARAM', proto => '94' },
164 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
165 ],
166 'IPP' => [
167 { action => 'PARAM', proto => 'tcp', dport => '631' },
168 ],
169 'IPPbrd' => [
170 { action => 'PARAM', proto => 'udp', dport => '631' },
171 ],
172 'IPPserver' => [
173 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
174 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
175 ],
176 'IPsec' => [
177 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
178 { action => 'PARAM', proto => '50' },
179 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
180 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
181 ],
182 'IPsecah' => [
183 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
184 { action => 'PARAM', proto => '51' },
185 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
186 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
187 ],
188 'IPsecnat' => [
189 { action => 'PARAM', proto => 'udp', dport => '500' },
190 { action => 'PARAM', proto => 'udp', dport => '4500' },
191 { action => 'PARAM', proto => '50' },
192 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
193 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
194 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
195 ],
196 'IRC' => [
197 { action => 'PARAM', proto => 'tcp', dport => '6667' },
198 ],
199 'JabberPlain' => [
200 { action => 'PARAM', proto => 'tcp', dport => '5222' },
201 ],
202 'JabberSecure' => [
203 { action => 'PARAM', proto => 'tcp', dport => '5223' },
204 ],
205 'Jabberd' => [
206 { action => 'PARAM', proto => 'tcp', dport => '5269' },
207 ],
208 'Jetdirect' => [
209 { action => 'PARAM', proto => 'tcp', dport => '9100' },
210 ],
211 'L2TP' => [
212 { action => 'PARAM', proto => 'udp', dport => '1701' },
213 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
214 ],
215 'LDAP' => [
216 { action => 'PARAM', proto => 'tcp', dport => '389' },
217 ],
218 'LDAPS' => [
219 { action => 'PARAM', proto => 'tcp', dport => '636' },
220 ],
221 'MSNP' => [
222 { action => 'PARAM', proto => 'tcp', dport => '1863' },
223 ],
224 'MSSQL' => [
225 { action => 'PARAM', proto => 'tcp', dport => '1433' },
226 ],
227 'Mail' => [
228 { action => 'PARAM', proto => 'tcp', dport => '25' },
229 { action => 'PARAM', proto => 'tcp', dport => '465' },
230 { action => 'PARAM', proto => 'tcp', dport => '587' },
231 ],
232 'Munin' => [
233 { action => 'PARAM', proto => 'tcp', dport => '4949' },
234 ],
235 'MySQL' => [
236 { action => 'PARAM', proto => 'tcp', dport => '3306' },
237 ],
238 'NNTP' => [
239 { action => 'PARAM', proto => 'tcp', dport => '119' },
240 ],
241 'NNTPS' => [
242 { action => 'PARAM', proto => 'tcp', dport => '563' },
243 ],
244 'NTP' => [
245 { action => 'PARAM', proto => 'udp', dport => '123' },
246 ],
247 'NTPbi' => [
248 { action => 'PARAM', proto => 'udp', dport => '123' },
249 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
250 ],
251 'NTPbrd' => [
252 { action => 'PARAM', proto => 'udp', dport => '123' },
253 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
254 ],
255 'OSPF' => [
256 { action => 'PARAM', proto => '89' },
257 ],
258 'OpenVPN' => [
259 { action => 'PARAM', proto => 'udp', dport => '1194' },
260 ],
261 'PCA' => [
262 { action => 'PARAM', proto => 'udp', dport => '5632' },
263 { action => 'PARAM', proto => 'tcp', dport => '5631' },
264 ],
265 'POP3' => [
266 { action => 'PARAM', proto => 'tcp', dport => '110' },
267 ],
268 'POP3S' => [
269 { action => 'PARAM', proto => 'tcp', dport => '995' },
270 ],
271 'PPtP' => [
272 { action => 'PARAM', proto => '47' },
273 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
274 { action => 'PARAM', proto => 'tcp', dport => '1723' },
275 ],
276 'Ping' => [
269d4f13 277 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
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278 ],
279 'PostgreSQL' => [
280 { action => 'PARAM', proto => 'tcp', dport => '5432' },
281 ],
282 'Printer' => [
283 { action => 'PARAM', proto => 'tcp', dport => '515' },
284 ],
285 'RDP' => [
286 { action => 'PARAM', proto => 'tcp', dport => '3389' },
287 ],
288 'RIPbi' => [
289 { action => 'PARAM', proto => 'udp', dport => '520' },
290 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
291 ],
292 'RNDC' => [
293 { action => 'PARAM', proto => 'tcp', dport => '953' },
294 ],
295 'Razor' => [
296 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
297 ],
298 'Rdate' => [
299 { action => 'PARAM', proto => 'tcp', dport => '37' },
300 ],
301 'Rsync' => [
302 { action => 'PARAM', proto => 'tcp', dport => '873' },
303 ],
304 'SANE' => [
305 { action => 'PARAM', proto => 'tcp', dport => '6566' },
306 ],
307 'SMB' => [
308 { action => 'PARAM', proto => 'udp', dport => '135,445' },
309 { action => 'PARAM', proto => 'udp', dport => '137:139' },
310 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
311 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
312 ],
313 'SMBBI' => [
314 { action => 'PARAM', proto => 'udp', dport => '135,445' },
315 { action => 'PARAM', proto => 'udp', dport => '137:139' },
316 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
317 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
318 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
319 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
320 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
321 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
322 ],
323 'SMBswat' => [
324 { action => 'PARAM', proto => 'tcp', dport => '901' },
325 ],
326 'SMTP' => [
327 { action => 'PARAM', proto => 'tcp', dport => '25' },
328 ],
329 'SMTPS' => [
330 { action => 'PARAM', proto => 'tcp', dport => '465' },
331 ],
332 'SNMP' => [
333 { action => 'PARAM', proto => 'udp', dport => '161:162' },
334 { action => 'PARAM', proto => 'tcp', dport => '161' },
335 ],
336 'SPAMD' => [
337 { action => 'PARAM', proto => 'tcp', dport => '783' },
338 ],
339 'SSH' => [
340 { action => 'PARAM', proto => 'tcp', dport => '22' },
341 ],
342 'SVN' => [
343 { action => 'PARAM', proto => 'tcp', dport => '3690' },
344 ],
345 'SixXS' => [
346 { action => 'PARAM', proto => 'tcp', dport => '3874' },
347 { action => 'PARAM', proto => 'udp', dport => '3740' },
348 { action => 'PARAM', proto => '41' },
349 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
350 ],
351 'Squid' => [
352 { action => 'PARAM', proto => 'tcp', dport => '3128' },
353 ],
354 'Submission' => [
355 { action => 'PARAM', proto => 'tcp', dport => '587' },
356 ],
357 'Syslog' => [
358 { action => 'PARAM', proto => 'udp', dport => '514' },
359 { action => 'PARAM', proto => 'tcp', dport => '514' },
360 ],
361 'TFTP' => [
362 { action => 'PARAM', proto => 'udp', dport => '69' },
363 ],
364 'Telnet' => [
365 { action => 'PARAM', proto => 'tcp', dport => '23' },
366 ],
367 'Telnets' => [
368 { action => 'PARAM', proto => 'tcp', dport => '992' },
369 ],
370 'Time' => [
371 { action => 'PARAM', proto => 'tcp', dport => '37' },
372 ],
373 'Trcrt' => [
374 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 375 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
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376 ],
377 'VNC' => [
378 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
379 ],
380 'VNCL' => [
381 { action => 'PARAM', proto => 'tcp', dport => '5500' },
382 ],
383 'Web' => [
384 { action => 'PARAM', proto => 'tcp', dport => '80' },
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385 { action => 'PARAM', proto => 'tcp', dport => '443' },
386 ],
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387 'Webcache' => [
388 { action => 'PARAM', proto => 'tcp', dport => '8080' },
389 ],
390 'Webmin' => [
391 { action => 'PARAM', proto => 'tcp', dport => '10000' },
392 ],
393 'Whois' => [
394 { action => 'PARAM', proto => 'tcp', dport => '43' },
395 ],
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396};
397
398my $pve_fw_parsed_macros;
399my $pve_fw_preferred_macro_names = {};
3a616aa0 400
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401my $pve_std_chains = {
402 'PVEFW-SET-ACCEPT-MARK' => [
403 "-j MARK --set-mark 1",
404 ],
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405 'PVEFW-DropBroadcast' => [
406 # same as shorewall 'Broadcast'
407 # simply DROP BROADCAST/MULTICAST/ANYCAST
408 # we can use this to reduce logging
409 { action => 'DROP', dsttype => 'BROADCAST' },
410 { action => 'DROP', dsttype => 'MULTICAST' },
411 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 412 { action => 'DROP', dest => '224.0.0.0/4' },
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413 ],
414 'PVEFW-reject' => [
415 # same as shorewall 'reject'
416 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 417 { action => 'DROP', source => '224.0.0.0/4' },
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418 { action => 'DROP', proto => 'icmp' },
419 "-p tcp -j REJECT --reject-with tcp-reset",
420 "-p udp -j REJECT --reject-with icmp-port-unreachable",
421 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
422 "-j REJECT --reject-with icmp-host-prohibited",
423 ],
424 'PVEFW-Drop' => [
cbb5d6f3 425 # same as shorewall 'Drop', which is equal to DROP,
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426 # but REJECT/DROP some packages to reduce logging,
427 # and ACCEPT critical ICMP types
428 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
429 # we are not interested in BROADCAST/MULTICAST/ANYCAST
430 { action => 'PVEFW-DropBroadcast' },
431 # ACCEPT critical ICMP types
432 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
433 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
434 # Drop packets with INVALID state
435 "-m conntrack --ctstate INVALID -j DROP",
436 # Drop Microsoft SMB noise
437 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
438 { action => 'DROP', proto => 'udp', dport => '137:139'},
439 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
440 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
441 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
442 # Drop new/NotSyn traffic so that it doesn't get logged
443 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
444 # Drop DNS replies
445 { action => 'DROP', proto => 'udp', sport => 53 },
446 ],
447 'PVEFW-Reject' => [
cbb5d6f3 448 # same as shorewall 'Reject', which is equal to Reject,
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449 # but REJECT/DROP some packages to reduce logging,
450 # and ACCEPT critical ICMP types
451 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
452 # we are not interested in BROADCAST/MULTICAST/ANYCAST
453 { action => 'PVEFW-DropBroadcast' },
454 # ACCEPT critical ICMP types
455 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
456 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
457 # Drop packets with INVALID state
458 "-m conntrack --ctstate INVALID -j DROP",
459 # Drop Microsoft SMB noise
460 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
461 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
462 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
463 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
464 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
465 # Drop new/NotSyn traffic so that it doesn't get logged
466 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
467 # Drop DNS replies
468 { action => 'DROP', proto => 'udp', sport => 53 },
469 ],
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470 'PVEFW-tcpflags' => [
471 # same as shorewall tcpflags action.
472 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
473 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
474 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
475 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
476 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
477 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
478 ],
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479 'PVEFW-smurfs' => [
480 # same as shorewall smurfs action
481 # Filter packets for smurfs (packets with a broadcast address as the source).
482 "-s 0.0.0.0/32 -j RETURN",
483 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
484 "-s 224.0.0.0/4 -g PVEFW-smurflog",
485 ],
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486};
487
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488# iptables -p icmp -h
489my $icmp_type_names = {
490 any => 1,
491 'echo-reply' => 1,
492 'destination-unreachable' => 1,
493 'network-unreachable' => 1,
494 'host-unreachable' => 1,
495 'protocol-unreachable' => 1,
496 'port-unreachable' => 1,
497 'fragmentation-needed' => 1,
498 'source-route-failed' => 1,
499 'network-unknown' => 1,
500 'host-unknown' => 1,
501 'network-prohibited' => 1,
502 'host-prohibited' => 1,
503 'TOS-network-unreachable' => 1,
504 'TOS-host-unreachable' => 1,
505 'communication-prohibited' => 1,
506 'host-precedence-violation' => 1,
507 'precedence-cutoff' => 1,
508 'source-quench' => 1,
509 'redirect' => 1,
510 'network-redirect' => 1,
511 'host-redirect' => 1,
512 'TOS-network-redirect' => 1,
513 'TOS-host-redirect' => 1,
514 'echo-request' => 1,
515 'router-advertisement' => 1,
516 'router-solicitation' => 1,
517 'time-exceeded' => 1,
518 'ttl-zero-during-transit' => 1,
519 'ttl-zero-during-reassembly' => 1,
520 'parameter-problem' => 1,
521 'ip-header-bad' => 1,
522 'required-option-missing' => 1,
523 'timestamp-request' => 1,
524 'timestamp-reply' => 1,
525 'address-mask-request' => 1,
526 'address-mask-reply' => 1,
527};
528
54cd19a8 529sub init_firewall_macros {
6158271d 530
961b4928 531 $pve_fw_parsed_macros = {};
9aab3127 532
961b4928 533 foreach my $k (keys %$pve_fw_macros) {
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534 my $lc_name = lc($k);
535 my $macro = $pve_fw_macros->{$k};
536 $pve_fw_preferred_macro_names->{$lc_name} = $k;
537 $pve_fw_parsed_macros->{$k} = $macro;
961b4928 538 }
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539}
540
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541init_firewall_macros();
542
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543my $etc_services;
544
545sub get_etc_services {
546
547 return $etc_services if $etc_services;
548
549 my $filename = "/etc/services";
550
551 my $fh = IO::File->new($filename, O_RDONLY);
552 if (!$fh) {
553 warn "unable to read '$filename' - $!\n";
554 return {};
555 }
556
557 my $services = {};
558
559 while (my $line = <$fh>) {
560 chomp ($line);
561 next if $line =~m/^#/;
562 next if ($line =~m/^\s*$/);
563
564 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
565 $services->{byid}->{$2}->{name} = $1;
35b66e9d 566 $services->{byid}->{$2}->{port} = $2;
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567 $services->{byid}->{$2}->{$3} = 1;
568 $services->{byname}->{$1} = $services->{byid}->{$2};
569 }
570 }
571
572 close($fh);
573
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574 $etc_services = $services;
575
3a616aa0 576
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577 return $etc_services;
578}
579
580my $etc_protocols;
581
582sub get_etc_protocols {
583 return $etc_protocols if $etc_protocols;
584
585 my $filename = "/etc/protocols";
586
587 my $fh = IO::File->new($filename, O_RDONLY);
588 if (!$fh) {
589 warn "unable to read '$filename' - $!\n";
590 return {};
591 }
592
593 my $protocols = {};
594
595 while (my $line = <$fh>) {
596 chomp ($line);
597 next if $line =~m/^#/;
598 next if ($line =~m/^\s*$/);
599
600 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
601 $protocols->{byid}->{$2}->{name} = $1;
602 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
603 }
604 }
605
606 close($fh);
607
608 $etc_protocols = $protocols;
609
610 return $etc_protocols;
611}
612
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613sub parse_address_list {
614 my ($str) = @_;
615
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616 return if $str !~ m/^(\+)(\S+)$/; # ipset ref
617
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618 my $count = 0;
619 my $iprange = 0;
620 foreach my $elem (split(/,/, $str)) {
621 $count++;
622 if (!Net::IP->new($elem)) {
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623 my $err = Net::IP::Error();
624 die "invalid IP address: $err\n";
625 }
3162af6b 626 $iprange = 1 if $elem =~ m/-/;
ecbea048 627 }
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628
629 die "you can use a range in a list\n" if $iprange && $count > 1;
ecbea048 630}
dddd9413 631
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632sub parse_port_name_number_or_range {
633 my ($str) = @_;
634
635 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 636 my $nbports = 0;
fcba0beb 637 foreach my $item (split(/,/, $str)) {
4cdbb3b7 638 my $portlist = "";
35b66e9d 639 my $oldpon = undef;
4b586518 640 $nbports++;
fcba0beb 641 foreach my $pon (split(':', $item, 2)) {
35b66e9d 642 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 643 if ($pon =~ m/^\d+$/){
857f62c8 644 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
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645 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
646 $oldpon = $pon;
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647 }else{
648 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
649 }
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650 }
651 }
652
4cdbb3b7 653 return ($nbports);
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654}
655
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656PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
657sub pve_fw_verify_port_spec {
658 my ($portstr) = @_;
659
660 parse_port_name_number_or_range($portstr);
661
662 return $portstr;
663}
664
665PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
666sub pve_fw_verify_v4addr_spec {
667 my ($list) = @_;
668
669 parse_address_list($list);
670
671 return $list;
672}
673
674PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
675sub pve_fw_verify_protocol_spec {
676 my ($proto) = @_;
677
678 my $protocols = get_etc_protocols();
679
680 die "unknown protocol '$proto'\n" if $proto &&
681 !(defined($protocols->{byname}->{$proto}) ||
682 defined($protocols->{byid}->{$proto}));
683
684 return $proto;
685}
686
687
d1c53b3e 688# helper function for API
d1c53b3e 689
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690my $rule_properties = {
691 pos => {
692 description => "Update rule at position <pos>.",
693 type => 'integer',
694 minimum => 0,
695 optional => 1,
696 },
697 digest => {
698 type => 'string',
699 optional => 1,
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700 maxLength => 27,
701 minLength => 27,
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702 },
703 type => {
704 type => 'string',
705 optional => 1,
706 enum => ['in', 'out', 'group'],
707 },
708 action => {
709 type => 'string',
710 optional => 1,
54cd19a8 711 enum => ['ACCEPT', 'DROP', 'REJECT'],
9c7e0858 712 },
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713 macro => {
714 type => 'string',
715 optional => 1,
54cd19a8 716 maxLength => 128,
e5076eee 717 },
54cd19a8 718 iface => get_standard_option('pve-iface', { optional => 1 }),
9c7e0858 719 source => {
54cd19a8 720 type => 'string', format => 'pve-fw-v4addr-spec',
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721 optional => 1,
722 },
723 dest => {
54cd19a8 724 type => 'string', format => 'pve-fw-v4addr-spec',
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725 optional => 1,
726 },
727 proto => {
54cd19a8 728 type => 'string', format => 'pve-fw-protocol-spec',
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729 optional => 1,
730 },
731 enable => {
732 type => 'boolean',
733 optional => 1,
734 },
735 sport => {
54cd19a8 736 type => 'string', format => 'pve-fw-port-spec',
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737 optional => 1,
738 },
739 dport => {
54cd19a8 740 type => 'string', format => 'pve-fw-port-spec',
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741 optional => 1,
742 },
743 comment => {
744 type => 'string',
745 optional => 1,
746 },
747};
748
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749sub cleanup_fw_rule {
750 my ($rule, $digest, $pos) = @_;
751
752 my $r = {};
753
754 foreach my $k (keys %$rule) {
755 next if !$rule_properties->{$k};
756 my $v = $rule->{$k};
757 next if !defined($v);
758 $r->{$k} = $v;
759 $r->{digest} = $digest;
760 $r->{pos} = $pos;
761 }
762
763 return $r;
764}
765
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766sub add_rule_properties {
767 my ($properties) = @_;
768
769 foreach my $k (keys %$rule_properties) {
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770 my $h = $rule_properties->{$k};
771 # copy data, so that we can modify later without side effects
772 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 773 }
cbb5d6f3 774
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775 return $properties;
776}
777
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778sub delete_rule_properties {
779 my ($rule, $delete_str) = @_;
780
781 foreach my $opt (PVE::Tools::split_list($delete_str)) {
782 raise_param_exc({ 'delete' => "no such property ('$opt')"})
783 if !defined($rule_properties->{$opt});
784 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
785 if $opt eq 'type' || $opt eq 'action';
786 delete $rule->{$opt};
787 }
788
789 return $rule;
790}
791
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792sub copy_rule_data {
793 my ($rule, $param) = @_;
794
795 foreach my $k (keys %$rule_properties) {
796 if (defined(my $v = $param->{$k})) {
797 if ($v eq '' || $v eq '-') {
798 delete $rule->{$k};
799 } else {
800 $rule->{$k} = $v;
801 }
802 } else {
803 delete $rule->{$k};
804 }
805 }
806 return $rule;
807}
808
809# core functions
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810my $bridge_firewall_enabled = 0;
811
812sub enable_bridge_firewall {
813
814 return if $bridge_firewall_enabled; # only once
815
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816 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
817 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 818
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819 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
820 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
821
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822 $bridge_firewall_enabled = 1;
823}
824
8cebfa6f 825my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 826
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827sub iptables_restore_cmdlist {
828 my ($cmdlist) = @_;
3a616aa0 829
3fa83edf 830 run_command("/sbin/iptables-restore -n", input => $cmdlist);
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831}
832
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833sub ipset_restore_cmdlist {
834 my ($cmdlist) = @_;
835
dd7a13fd 836 run_command("/usr/sbin/ipset restore", input => $cmdlist);
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837}
838
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839sub iptables_get_chains {
840
841 my $res = {};
842
843 # check what chains we want to track
844 my $is_pvefw_chain = sub {
845 my $name = shift;
846
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847 return 1 if $name =~ m/^PVEFW-\S+$/;
848
de2a57cd 849 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
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850
851 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
852
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853 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
854
da6fc60b 855 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
f50656c2 856 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
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857
858 return undef;
859 };
860
861 my $table = '';
862
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863 my $hooks = {};
864
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865 my $parser = sub {
866 my $line = shift;
867
868 return if $line =~ m/^#/;
869 return if $line =~ m/^\s*$/;
870
871 if ($line =~ m/^\*(\S+)$/) {
872 $table = $1;
873 return;
874 }
875
876 return if $table ne 'filter';
877
878 if ($line =~ m/^:(\S+)\s/) {
879 my $chain = $1;
880 return if !&$is_pvefw_chain($chain);
3fa83edf 881 $res->{$chain} = "unknown";
09d5f68e 882 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 883 my ($chain, $sig) = ($1, $2);
de2a57cd 884 return if !&$is_pvefw_chain($chain);
3fa83edf 885 $res->{$chain} = $sig;
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886 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
887 $hooks->{$1} = 1;
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888 } else {
889 # simply ignore the rest
890 return;
891 }
892 };
893
894 run_command("/sbin/iptables-save", outfunc => $parser);
895
c4a2e5ae 896 return wantarray ? ($res, $hooks) : $res;
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897}
898
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899sub iptables_chain_digest {
900 my ($rules) = @_;
901 my $digest = Digest::SHA->new('sha1');
902 foreach my $rule (@$rules) { # order is important
903 $digest->add($rule);
904 }
905 return $digest->b64digest;
906}
907
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908sub ipset_chain_digest {
909 my ($rules) = @_;
4bd0a9c4 910
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911 my $digest = Digest::SHA->new('sha1');
912 foreach my $rule (sort @$rules) { # note: sorted
913 $digest->add($rule);
914 }
915 return $digest->b64digest;
916}
917
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918sub ipset_get_chains {
919
920 my $res = {};
921 my $chains = {};
922
923 my $parser = sub {
924 my $line = shift;
925
926 return if $line =~ m/^#/;
927 return if $line =~ m/^\s*$/;
4b96e877 928 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
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929 my $chain = $1;
930 $line =~ s/\s+$//; # delete trailing white space
931 push @{$chains->{$chain}}, $line;
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932 } else {
933 # simply ignore the rest
934 return;
935 }
936 };
937
3f95d14a 938 run_command("/usr/sbin/ipset save", outfunc => $parser);
34cdedfa 939
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940 # compute digest for each chain
941 foreach my $chain (keys %$chains) {
942 $res->{$chain} = ipset_chain_digest($chains->{$chain});
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943 }
944
945 return $res;
946}
947
eba0fb64 948sub ruleset_generate_cmdstr {
ba791b1f 949 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
3a616aa0 950
00bb4391 951 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 952
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953 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
954
955 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
956 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
e5076eee 957
41524a58 958 my @cmd = ();
3a616aa0 959
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960 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
961 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
962
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963 my $source = $rule->{source};
964 my $dest = $rule->{dest};
965
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966 if ($source) {
967 if ($source =~ m/^(\+)(\S+)$/) {
936af352 968 die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
4b96e877 969 push @cmd, "-m set --match-set PVEFW-$2 src";
ba791b1f 970
ac8242cc 971 } elsif ($source =~ m/\-/){
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972 push @cmd, "-m iprange --src-range $source";
973
cbb5d6f3 974 } else {
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975 push @cmd, "-s $source";
976 }
977 }
978
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979 if ($dest) {
980 if ($dest =~ m/^(\+)(\S+)$/) {
936af352 981 die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
4b96e877 982 push @cmd, "-m set --match-set PVEFW-$2 dst";
ba791b1f 983
cbb5d6f3 984 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
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985 push @cmd, "-m iprange --dst-range $dest";
986
cbb5d6f3 987 } else {
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988 push @cmd, "-s $dest";
989 }
990 }
4b586518 991
181390b0 992 if ($rule->{proto}) {
41524a58 993 push @cmd, "-p $rule->{proto}";
e3a1d391 994
181390b0 995 my $multiport = 0;
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996 $multiport++ if $nbdport > 1;
997 $multiport++ if $nbsport > 1;
e3a1d391 998
41524a58 999 push @cmd, "--match multiport" if $multiport;
4b586518 1000
cbb5d6f3 1001 die "multiport: option '--sports' cannot be used together with '--dports'\n"
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1002 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1003
1004 if ($rule->{dport}) {
1005 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1006 # Note: we use dport to store --icmp-type
1007 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 1008 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0 1009 } else {
e5076eee 1010 if ($nbdport > 1) {
181390b0 1011 if ($multiport == 2) {
41524a58 1012 push @cmd, "--ports $rule->{dport}";
181390b0 1013 } else {
41524a58 1014 push @cmd, "--dports $rule->{dport}";
181390b0 1015 }
e3a1d391 1016 } else {
41524a58 1017 push @cmd, "--dport $rule->{dport}";
e3a1d391 1018 }
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DM
1019 }
1020 }
4b586518 1021
181390b0 1022 if ($rule->{sport}) {
e5076eee 1023 if ($nbsport > 1) {
41524a58 1024 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 1025 } else {
41524a58 1026 push @cmd, "--sport $rule->{sport}";
181390b0 1027 }
4b586518 1028 }
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1029 } elsif ($rule->{dport} || $rule->{sport}) {
1030 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1031 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
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1032 }
1033
41524a58 1034 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
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1035
1036 if (my $action = $rule->{action}) {
cbb5d6f3 1037 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 1038 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 1039 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 1040 }
3a616aa0 1041
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1042 return scalar(@cmd) ? join(' ', @cmd) : undef;
1043}
1044
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1045my $apply_macro = sub {
1046 my ($macro_name, $param) = @_;
1047
1048 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1049 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1050
1051 my $rules = [];
1052
1053 foreach my $templ (@$macro_rules) {
1054 my $rule = {};
1055 my $param_used = {};
1056 foreach my $k (keys %$templ) {
1057 my $v = $templ->{$k};
1058 if ($v eq 'PARAM') {
1059 $v = $param->{$k};
1060 $param_used->{$k} = 1;
1061 } elsif ($v eq 'DEST') {
1062 $v = $param->{dest};
1063 $param_used->{dest} = 1;
1064 } elsif ($v eq 'SOURCE') {
1065 $v = $param->{source};
1066 $param_used->{source} = 1;
1067 }
1068
1069 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1070 $rule->{$k} = $v;
1071 }
1072 foreach my $k (keys %$param) {
1073 next if $k eq 'macro';
1074 next if !defined($param->{$k});
1075 next if $param_used->{$k};
1076 if (defined($rule->{$k})) {
1077 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1078 if $rule->{$k} ne $param->{$k};
1079 } else {
1080 $rule->{$k} = $param->{$k};
1081 }
1082 }
1083 push @$rules, $rule;
1084 }
1085
1086 return $rules;
1087};
1088
eba0fb64 1089sub ruleset_generate_rule {
ba791b1f 1090 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
eba0fb64 1091
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1092 my $rules;
1093
1094 if ($rule->{macro}) {
1095 $rules = &$apply_macro($rule->{macro}, $rule);
1096 } else {
1097 $rules = [ $rule ];
1098 }
1099
cbb5d6f3 1100 foreach my $tmp (@$rules) {
ba791b1f 1101 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
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1102 ruleset_addrule($ruleset, $chain, $cmdstr);
1103 }
41524a58 1104 }
3fa83edf 1105}
0f168d7b 1106
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1107sub ruleset_generate_rule_insert {
1108 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1109
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1110 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1111
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1112 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1113 ruleset_insertrule($ruleset, $chain, $cmdstr);
1114 }
1115}
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1116
1117sub ruleset_create_chain {
1118 my ($ruleset, $chain) = @_;
3a616aa0 1119
d050c724 1120 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1121 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1122
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1123 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1124
1125 $ruleset->{$chain} = [];
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AD
1126}
1127
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1128sub ruleset_chain_exist {
1129 my ($ruleset, $chain) = @_;
3a616aa0 1130
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1131 return $ruleset->{$chain} ? 1 : undef;
1132}
3a616aa0 1133
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1134sub ruleset_addrule {
1135 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1136
3fa83edf 1137 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1138
3fa83edf
DM
1139 push @{$ruleset->{$chain}}, "-A $chain $rule";
1140}
3a616aa0 1141
3fa83edf
DM
1142sub ruleset_insertrule {
1143 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1144
3fa83edf 1145 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1146
3fa83edf
DM
1147 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1148}
3a616aa0 1149
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1150sub get_log_rule_base {
1151 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 1152
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DM
1153 die "internal error - no log level" if !defined($loglevel);
1154
1155 $vmid = 0 if !defined($vmid);
1156
cbb5d6f3 1157 # Note: we use special format for prefix to pass further
782c4cde
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1158 # info to log daemon (VMID, LOGVELEL and CHAIN)
1159
1160 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1161}
1162
1163sub ruleset_addlog {
1164 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1165
1166 return if !defined($loglevel);
1167
1168 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1169
1170 $logrule = "$rule $logrule" if defined($rule);
1171
1172 ruleset_addrule($ruleset, $chain, $logrule)
1173}
1174
3fa83edf 1175sub generate_bridge_chains {
530c005e
DM
1176 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1177
1178 my $options = $hostfw_conf->{options} || {};
1179
1180 die "error: detected direct route to bridge '$bridge'\n"
1181 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 1182
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DM
1183 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1184 ruleset_create_chain($ruleset, "$bridge-FW");
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DM
1185 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1186 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
3fa83edf 1187 }
3a616aa0 1188
3fa83edf
DM
1189 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1190 ruleset_create_chain($ruleset, "$bridge-OUT");
3cc81077
DM
1191 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1192 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
9fcad984
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1193 }
1194
1195 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1196 ruleset_create_chain($ruleset, "$bridge-IN");
3cc81077 1197 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
fdb0bf20 1198 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d 1199 # accept traffic to unmanaged bridge ports
3cc81077 1200 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
3fa83edf
DM
1201 }
1202}
3a616aa0 1203
ead850e8 1204sub ruleset_add_chain_policy {
782c4cde 1205 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM
1206
1207 if ($policy eq 'ACCEPT') {
1208
1209 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1210 { ACCEPT => $accept_action});
1211
1212 } elsif ($policy eq 'DROP') {
1213
1214 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1215
782c4cde 1216 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM
1217
1218 ruleset_addrule($ruleset, $chain, "-j DROP");
1219 } elsif ($policy eq 'REJECT') {
1220 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1221
782c4cde 1222 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM
1223
1224 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1225 } else {
1226 # should not happen
1227 die "internal error: unknown policy '$policy'";
1228 }
1229}
1230
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1231sub ruleset_create_vm_chain {
1232 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 1233
9e15114a 1234 ruleset_create_chain($ruleset, $chain);
b47ecc88 1235 my $accept = generate_nfqueue($options);
3a616aa0 1236
bee633ab 1237 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 1238 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM
1239 }
1240
ce15d90b 1241 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 1242 if ($direction eq 'OUT') {
cbb5d6f3 1243 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
0f168d7b 1244 proto => 'udp', sport => 68, dport => 67 });
76a2d1e7 1245 } else {
cbb5d6f3 1246 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
0f168d7b 1247 proto => 'udp', sport => 67, dport => 68 });
76a2d1e7 1248 }
ce15d90b
DM
1249 }
1250
bee633ab 1251 if ($options->{tcpflags}) {
9e15114a 1252 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM
1253 }
1254
9e15114a 1255 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
cbb5d6f3 1256 if ($direction eq 'OUT') {
b47ecc88 1257 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
cbb5d6f3 1258 } else {
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AD
1259 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1260 }
cbb5d6f3 1261
b21aca2c
DM
1262 if ($direction eq 'OUT') {
1263 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 1264 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 1265 }
9e15114a 1266 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 1267 }
9e15114a
DM
1268}
1269
1270sub ruleset_generate_vm_rules {
fca39c2c 1271 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
9e15114a
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1272
1273 my $lc_direction = lc($direction);
c29f55c9 1274
92e976b3
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1275 foreach my $rule (@$rules) {
1276 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1277 next if !$rule->{enable};
92e976b3 1278 if ($rule->{type} eq 'group') {
cbb5d6f3 1279 my $group_chain = "GROUP-$rule->{action}-$direction";
92e976b3 1280 if(!ruleset_chain_exist($ruleset, $group_chain)){
fca39c2c 1281 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
92e976b3 1282 }
9e15114a 1283 ruleset_addrule($ruleset, $chain, "-j $group_chain");
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1284 if ($direction eq 'OUT'){
1285 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1286 }else{
1287 my $accept = generate_nfqueue($options);
1288 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1289 }
1290
92e976b3
DM
1291 } else {
1292 next if $rule->{type} ne $lc_direction;
1293 if ($direction eq 'OUT') {
cbb5d6f3 1294 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1295 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
4e6112f9 1296 } else {
b47ecc88 1297 my $accept = generate_nfqueue($options);
ba791b1f 1298 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
3a616aa0 1299 }
4e6112f9 1300 }
3a616aa0 1301 }
9e15114a
DM
1302}
1303
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AD
1304sub generate_nfqueue {
1305 my ($options) = @_;
1306
1307 my $action = "";
1308 if($options->{ips}){
1309 $action = "NFQUEUE";
1310 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1311 if(defined($3) && defined($1)) {
1312 $action .= " --queue-balance $1:$3";
1313 }elsif (defined($1)) {
1314 $action .= " --queue-num $1";
1315 }
1316 }
1317 $action .= " --queue-bypass";
1318 }else{
1319 $action = "ACCEPT";
1320 }
1321
1322 return $action;
1323}
1324
da6fc60b
AD
1325sub ruleset_generate_vm_ipsrules {
1326 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1327
1328 if ($options->{ips} && $direction eq 'IN') {
1329 my $nfqueue = generate_nfqueue($options);
1330
1331 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1332 ruleset_create_chain($ruleset, "PVEFW-IPS");
1333 }
1334
1335 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1336 ruleset_create_chain($ruleset, "$bridge-IPS");
1337 ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1338 }
1339
1340 ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1341 }
1342}
1343
9e15114a 1344sub generate_venet_rules_direction {
fca39c2c 1345 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
9e15114a 1346
5176619e 1347 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM
1348
1349 my $lc_direction = lc($direction);
1350
1351 my $rules = $vmfw_conf->{rules};
1352
1353 my $options = $vmfw_conf->{options};
1354 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1355
1356 my $chain = "venet0-$vmid-$direction";
1357
1358 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1359
fca39c2c 1360 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
9e15114a
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1361
1362 # implement policy
1363 my $policy;
1364
1365 if ($direction eq 'OUT') {
1366 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1367 } else {
1368 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1369 }
1370
b47ecc88
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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, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1374
38485daa 1375 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM
1376 if ($direction eq 'OUT') {
1377 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1378 action => $chain,
1379 source => $ip,
1380 iface_in => 'venet0'});
38485daa
DM
1381
1382 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1383 action => $chain,
1384 source => $ip,
1385 iface_in => 'venet0'});
eba0fb64
DM
1386 } else {
1387 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1388 action => $chain,
1389 dest => $ip,
1390 iface_out => 'venet0'});
38485daa
DM
1391
1392 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1393 action => $chain,
1394 dest => $ip,
1395 iface_out => 'venet0'});
eba0fb64 1396 }
9e15114a
DM
1397}
1398
1399sub generate_tap_rules_direction {
fca39c2c 1400 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
9e15114a
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1401
1402 my $lc_direction = lc($direction);
1403
1404 my $rules = $vmfw_conf->{rules};
1405
1406 my $options = $vmfw_conf->{options};
1407 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1408
1409 my $tapchain = "$iface-$direction";
1410
1411 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1412
fca39c2c 1413 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
3a616aa0 1414
da6fc60b
AD
1415 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1416
ccae0b50
DM
1417 # implement policy
1418 my $policy;
1419
1420 if ($direction eq 'OUT') {
72f63fde 1421 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1422 } else {
72f63fde 1423 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM
1424 }
1425
b47ecc88
AD
1426 my $accept = generate_nfqueue($options);
1427 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1428 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1429
3fa83edf 1430 # plug the tap chain to bridge chain
3cc81077
DM
1431 if ($direction eq 'IN') {
1432 ruleset_insertrule($ruleset, "$bridge-IN",
1433 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1434 } else {
1435 ruleset_insertrule($ruleset, "$bridge-OUT",
1436 "-m physdev --physdev-in $iface -j $tapchain");
1437 }
3a616aa0
AD
1438}
1439
d18c1e2b 1440sub enable_host_firewall {
fca39c2c 1441 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
0bd5f137 1442
51bae274 1443 # fixme: allow security groups
0bd5f137 1444
92e976b3
DM
1445 my $options = $hostfw_conf->{options};
1446 my $rules = $hostfw_conf->{rules};
178a63be 1447
3fa83edf 1448 # host inbound firewall
dec84fcd
DM
1449 my $chain = "PVEFW-HOST-IN";
1450 ruleset_create_chain($ruleset, $chain);
0bd5f137 1451
178a63be
DM
1452 my $loglevel = get_option_log_level($options, "log_level_in");
1453
4ac863a6
DM
1454 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1455 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1456 }
1457
fb424a00
DM
1458 if ($options->{tcpflags}) {
1459 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1460 }
1461
7fab95bc
DM
1462 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1463 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM
1464 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1465 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1466 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1467 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1468
23e888f8
DM
1469 # we use RETURN because we need to check also tap rules
1470 my $accept_action = 'RETURN';
1471
92e976b3
DM
1472 foreach my $rule (@$rules) {
1473 next if $rule->{type} ne 'in';
ba791b1f 1474 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
0bd5f137
AD
1475 }
1476
23e888f8 1477 # implement input policy
72f63fde 1478 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1479 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1480
3fa83edf 1481 # host outbound firewall
aadd745e 1482 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM
1483 ruleset_create_chain($ruleset, $chain);
1484
178a63be
DM
1485 $loglevel = get_option_log_level($options, "log_level_out");
1486
7fab95bc
DM
1487 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1488 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM
1489 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1490 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1491 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1492 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1493
23e888f8
DM
1494 # we use RETURN because we may want to check other thigs later
1495 $accept_action = 'RETURN';
1496
92e976b3
DM
1497 foreach my $rule (@$rules) {
1498 next if $rule->{type} ne 'out';
ba791b1f 1499 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
0bd5f137
AD
1500 }
1501
23e888f8 1502 # implement output policy
72f63fde 1503 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1504 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1505
dec84fcd
DM
1506 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1507 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD
1508}
1509
1510sub generate_group_rules {
fca39c2c 1511 my ($ruleset, $cluster_conf, $group) = @_;
c6f5cc88 1512 die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
9d31b418 1513
c6f5cc88 1514 my $rules = $cluster_conf->{groups}->{$group};
6158271d 1515
3fa83edf 1516 my $chain = "GROUP-${group}-IN";
9d31b418 1517
3fa83edf 1518 ruleset_create_chain($ruleset, $chain);
b47ecc88 1519 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1520
92e976b3
DM
1521 foreach my $rule (@$rules) {
1522 next if $rule->{type} ne 'in';
ba791b1f 1523 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418
AD
1524 }
1525
3fa83edf 1526 $chain = "GROUP-${group}-OUT";
9d31b418 1527
3fa83edf 1528 ruleset_create_chain($ruleset, $chain);
4e6112f9 1529 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1530
92e976b3
DM
1531 foreach my $rule (@$rules) {
1532 next if $rule->{type} ne 'out';
1533 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1534 # check also other tap rules later
cbb5d6f3 1535 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1536 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418 1537 }
9d31b418
AD
1538}
1539
51bae274
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1540my $MAX_NETS = 32;
1541my $valid_netdev_names = {};
1542for (my $i = 0; $i < $MAX_NETS; $i++) {
1543 $valid_netdev_names->{"net$i"} = 1;
1544}
5e1267a5 1545
51bae274
DM
1546sub parse_fw_rule {
1547 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1548
92e976b3 1549 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1550
11bac5c2 1551 # we can add single line comments to the end of the rule
30c1ae52 1552 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM
1553
1554 # we can disable a rule when prefixed with '|'
ea9e5116
DM
1555 my $enable = 1;
1556
1557 $enable = 0 if $line =~ s/^\|//;
51bae274
DM
1558
1559 my @data = split(/\s+/, $line);
92e976b3 1560 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM
1561
1562 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1563
1564 if ($need_iface) {
92e976b3 1565 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1566 } else {
92e976b3 1567 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM
1568 }
1569
92e976b3 1570 die "incomplete rule\n" if ! ($type && $action);
51bae274 1571
961b4928 1572 my $macro;
961b4928 1573
92e976b3
DM
1574 $type = lc($type);
1575
1576 if ($type eq 'in' || $type eq 'out') {
1577 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1578 # OK
1579 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
e5076eee
DM
1580 $action = $2;
1581 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1582 die "unknown macro '$1'\n" if !$preferred_name;
1583 $macro = $preferred_name;
92e976b3
DM
1584 } else {
1585 die "unknown action '$action'\n";
1586 }
1587 } elsif ($type eq 'group') {
1588 die "wrong number of rule elements\n" if scalar(@data) != 3;
1589 die "groups disabled\n" if !$allow_groups;
1590
cbb5d6f3 1591 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1592 } else {
92e976b3 1593 die "unknown rule type '$type'\n";
51bae274
DM
1594 }
1595
1596 if ($need_iface) {
1597 $iface = undef if $iface && $iface eq '-';
51bae274
DM
1598 }
1599
1600 $proto = undef if $proto && $proto eq '-';
54cd19a8 1601 pve_fw_verify_protocol_spec($proto) if $proto;
51bae274
DM
1602
1603 $source = undef if $source && $source eq '-';
1604 $dest = undef if $dest && $dest eq '-';
1605
1606 $dport = undef if $dport && $dport eq '-';
1607 $sport = undef if $sport && $sport eq '-';
1608
e5076eee
DM
1609 parse_port_name_number_or_range($dport) if defined($dport);
1610 parse_port_name_number_or_range($sport) if defined($sport);
ba791b1f 1611
d72beb8e
DM
1612 parse_address_list($source) if $source;
1613 parse_address_list($dest) if $dest;
51bae274 1614
e5076eee 1615 return {
92e976b3 1616 type => $type,
ea9e5116 1617 enable => $enable,
11bac5c2 1618 comment => $comment,
51bae274 1619 action => $action,
e5076eee 1620 macro => $macro,
51bae274
DM
1621 iface => $iface,
1622 source => $source,
1623 dest => $dest,
51bae274
DM
1624 proto => $proto,
1625 dport => $dport,
1626 sport => $sport,
51bae274
DM
1627 };
1628}
1629
2d404ffc 1630sub parse_vmfw_option {
85c6eaed
DM
1631 my ($line) = @_;
1632
1633 my ($opt, $value);
1634
178a63be
DM
1635 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1636
b47ecc88 1637 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM
1638 $opt = lc($1);
1639 $value = int($2);
178a63be
DM
1640 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1641 $opt = lc($1);
1642 $value = $2 ? lc($3) : '';
72f63fde 1643 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM
1644 $opt = lc($1);
1645 $value = uc($3);
b47ecc88
AD
1646 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1647 $opt = lc($1);
1648 $value = $2;
9c6b6efd 1649 } else {
85c6eaed
DM
1650 chomp $line;
1651 die "can't parse option '$line'\n"
1652 }
1653
1654 return ($opt, $value);
1655}
1656
2d404ffc
DM
1657sub parse_hostfw_option {
1658 my ($line) = @_;
1659
1660 my ($opt, $value);
1661
1662 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1663
cc10e5d7 1664 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
2d404ffc
DM
1665 $opt = lc($1);
1666 $value = int($2);
178a63be 1667 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM
1668 $opt = lc($1);
1669 $value = $2 ? lc($3) : '';
72f63fde 1670 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM
1671 $opt = lc($1);
1672 $value = uc($3);
490cdead
DM
1673 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1674 $opt = lc($1);
1675 $value = int($2);
2d404ffc
DM
1676 } else {
1677 chomp $line;
1678 die "can't parse option '$line'\n"
1679 }
1680
1681 return ($opt, $value);
1682}
1683
c6f5cc88
DM
1684sub parse_clusterfw_option {
1685 my ($line) = @_;
1686
1687 my ($opt, $value);
1688
1689 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1690 $opt = lc($1);
1691 $value = int($2);
1692 } else {
1693 chomp $line;
1694 die "can't parse option '$line'\n"
1695 }
1696
1697 return ($opt, $value);
1698}
1699
51bae274
DM
1700sub parse_vm_fw_rules {
1701 my ($filename, $fh) = @_;
1702
92e976b3 1703 my $res = { rules => [], options => {}};
51bae274
DM
1704
1705 my $section;
1706
e7b35711
DM
1707 my $digest = Digest::SHA->new('sha1');
1708
5e1267a5 1709 while (defined(my $line = <$fh>)) {
e7b35711
DM
1710 $digest->add($line);
1711
5e1267a5
DM
1712 next if $line =~ m/^#/;
1713 next if $line =~ m/^\s*$/;
1714
961b4928
DM
1715 my $linenr = $fh->input_line_number();
1716 my $prefix = "$filename (line $linenr)";
1717
85c6eaed 1718 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1719 $section = lc($1);
85c6eaed 1720 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM
1721 next;
1722 }
51bae274 1723 if (!$section) {
961b4928 1724 warn "$prefix: skip line - no section";
5e1267a5
DM
1725 next;
1726 }
1727
85c6eaed
DM
1728 next if !$res->{$section}; # skip undefined section
1729
1730 if ($section eq 'options') {
6158271d 1731 eval {
2d404ffc 1732 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM
1733 $res->{options}->{$opt} = $value;
1734 };
1735 warn "$prefix: $@" if $@;
1736 next;
1737 }
1738
e5076eee
DM
1739 my $rule;
1740 eval { $rule = parse_fw_rule($line, 1, 1); };
51bae274 1741 if (my $err = $@) {
961b4928 1742 warn "$prefix: $err";
5e1267a5
DM
1743 next;
1744 }
1745
e5076eee 1746 push @{$res->{$section}}, $rule;
51bae274
DM
1747 }
1748
e7b35711
DM
1749 $res->{digest} = $digest->b64digest;
1750
51bae274
DM
1751 return $res;
1752}
1753
1754sub parse_host_fw_rules {
1755 my ($filename, $fh) = @_;
1756
92e976b3 1757 my $res = { rules => [], options => {}};
51bae274
DM
1758
1759 my $section;
1760
8b27beb9
DM
1761 my $digest = Digest::SHA->new('sha1');
1762
51bae274 1763 while (defined(my $line = <$fh>)) {
8b27beb9
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 $linenr)";
1771
2d404ffc 1772 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1773 $section = lc($1);
2d404ffc 1774 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM
1775 next;
1776 }
51bae274 1777 if (!$section) {
961b4928 1778 warn "$prefix: skip line - no section";
5e1267a5
DM
1779 next;
1780 }
1781
2d404ffc
DM
1782 next if !$res->{$section}; # skip undefined section
1783
1784 if ($section eq 'options') {
1785 eval {
2d404ffc
DM
1786 my ($opt, $value) = parse_hostfw_option($line);
1787 $res->{options}->{$opt} = $value;
1788 };
1789 warn "$prefix: $@" if $@;
1790 next;
1791 }
1792
e5076eee
DM
1793 my $rule;
1794 eval { $rule = parse_fw_rule($line, 1, 1); };
ecbea048 1795 if (my $err = $@) {
961b4928 1796 warn "$prefix: $err";
ecbea048 1797 next;
ecbea048 1798 }
cbb5d6f3 1799
e5076eee 1800 push @{$res->{$section}}, $rule;
51bae274 1801 }
ecbea048 1802
cbb5d6f3 1803$res->{digest} = $digest->b64digest;
8b27beb9 1804
51bae274
DM
1805 return $res;
1806}
4cdbb3b7 1807
c6f5cc88 1808sub parse_cluster_fw_rules {
51bae274 1809 my ($filename, $fh) = @_;
5e1267a5 1810
51bae274
DM
1811 my $section;
1812 my $group;
1813
c4a2e5ae 1814 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
6158271d 1815
d1c53b3e
DM
1816 my $digest = Digest::SHA->new('sha1');
1817
51bae274 1818 while (defined(my $line = <$fh>)) {
d1c53b3e
DM
1819 $digest->add($line);
1820
51bae274
DM
1821 next if $line =~ m/^#/;
1822 next if $line =~ m/^\s*$/;
1823
961b4928
DM
1824 my $linenr = $fh->input_line_number();
1825 my $prefix = "$filename (line $linenr)";
1826
c6f5cc88
DM
1827 if ($line =~ m/^\[options\]$/i) {
1828 $section = 'options';
1829 next;
1830 }
1831
92e976b3 1832 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
c6f5cc88 1833 $section = 'groups';
92e976b3 1834 $group = lc($1);
51bae274
DM
1835 next;
1836 }
34cdedfa 1837
c6f5cc88
DM
1838 if ($line =~ m/^\[rules\]$/i) {
1839 $section = 'rules';
1840 next;
1841 }
cbb5d6f3 1842
936af352 1843 if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
34cdedfa
AD
1844 $section = 'ipset';
1845 $group = lc($1);
34cdedfa
AD
1846 next;
1847 }
1848
c6f5cc88 1849 if (!$section) {
cbb5d6f3 1850 warn "$prefix: skip line - no section\n";
51bae274
DM
1851 next;
1852 }
1853
c6f5cc88
DM
1854 if ($section eq 'options') {
1855 eval {
1856 my ($opt, $value) = parse_clusterfw_option($line);
1857 $res->{options}->{$opt} = $value;
1858 };
1859 warn "$prefix: $@" if $@;
1860 } elsif ($section eq 'rules') {
1861 my $rule;
1862 eval { $rule = parse_fw_rule($line, 1, 1); };
1863 if (my $err = $@) {
1864 warn "$prefix: $err";
1865 next;
1866 }
1867 push @{$res->{$section}}, $rule;
1868 } elsif ($section eq 'groups') {
34cdedfa
AD
1869 my $rule;
1870 eval { $rule = parse_fw_rule($line, 0, 0); };
1871 if (my $err = $@) {
1872 warn "$prefix: $err";
1873 next;
1874 }
3f95d14a 1875 push @{$res->{$section}->{$group}}, $rule;
3f95d14a
DM
1876 } elsif ($section eq 'ipset') {
1877 chomp $line;
cbb5d6f3 1878 $line =~ m/^(\!)?\s*((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
2a052ee3 1879 my $nomatch = $1;
cbb5d6f3 1880 my $ip = $2;
2a052ee3
AD
1881
1882 if(!$ip){
cbb5d6f3 1883 warn "$prefix: $line is not an valid ip address\n";
34cdedfa
AD
1884 next;
1885 }
2a052ee3 1886 if (!Net::IP->new($ip)) {
cbb5d6f3 1887 warn "$prefix: $line is not an valid ip address\n";
2a052ee3
AD
1888 next;
1889 }
2a052ee3 1890
cbb5d6f3
DM
1891 if ($nomatch) {
1892 if ($feature_ipset_nomatch) {
1893 push @{$res->{$section}->{$group}}, "$ip nomatch";
1894 } else {
1895 warn "$prefix: ignore $line - nomatch not supported by kernel\n";
1896 }
1897 } else {
1898 push @{$res->{$section}->{$group}}, $ip;
1899 }
51bae274 1900 }
5e1267a5
DM
1901 }
1902
d1c53b3e 1903 $res->{digest} = $digest->b64digest;
5e1267a5
DM
1904 return $res;
1905}
1906
06320eb0
DM
1907sub run_locked {
1908 my ($code, @param) = @_;
1909
1910 my $timeout = 10;
1911
1912 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1913
1914 die $@ if $@;
1915
1916 return $res;
1917}
1918
5e1267a5
DM
1919sub read_local_vm_config {
1920
1921 my $openvz = {};
5e1267a5
DM
1922 my $qemu = {};
1923
c8301d63 1924 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1925
c8301d63
DM
1926 my $vmlist = PVE::Cluster::get_vmlist();
1927 return $vmdata if !$vmlist || !$vmlist->{ids};
1928 my $ids = $vmlist->{ids};
1929
1930 foreach my $vmid (keys %$ids) {
1931 next if !$vmid; # skip VE0
1932 my $d = $ids->{$vmid};
1933 next if !$d->{node} || $d->{node} ne $nodename;
1934 next if !$d->{type};
1935 if ($d->{type} eq 'openvz') {
d9fee004
DM
1936 if ($have_pve_manager) {
1937 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1938 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1939 $openvz->{$vmid} = $conf;
1940 }
c8301d63
DM
1941 }
1942 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM
1943 if ($have_qemu_server) {
1944 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1945 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1946 $qemu->{$vmid} = $conf;
1947 }
c8301d63 1948 }
5e1267a5
DM
1949 }
1950 }
d9fee004 1951
5e1267a5
DM
1952 return $vmdata;
1953};
1954
e7b35711
DM
1955sub load_vmfw_conf {
1956 my ($vmid) = @_;
1957
1958 my $vmfw_conf = {};
1959
1960 my $filename = "/etc/pve/firewall/$vmid.fw";
1961 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1962 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1963 }
1964
1965 return $vmfw_conf;
1966}
1967
464f933e
DM
1968my $format_rules = sub {
1969 my ($rules, $need_iface) = @_;
1970
1971 my $raw = '';
1972
1973 foreach my $rule (@$rules) {
1974 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
1975 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
1976 $raw .= uc($rule->{type});
1977 $raw .= " " . $rule->{action};
1978 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
1979 $raw .= " " . ($rule->{source} || '-');
1980 $raw .= " " . ($rule->{dest} || '-');
1981 $raw .= " " . ($rule->{proto} || '-');
1982 $raw .= " " . ($rule->{dport} || '-');
1983 $raw .= " " . ($rule->{sport} || '-');
cbb5d6f3 1984 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM
1985 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
1986 $raw .= "\n";
1987 } else {
1988 die "implement me '$rule->{type}'";
1989 }
1990 }
1991
1992 return $raw;
1993};
1994
1995my $format_options = sub {
68c90e21
DM
1996 my ($options) = @_;
1997
1998 my $raw = '';
464f933e
DM
1999
2000 $raw .= "[OPTIONS]\n\n";
2001 foreach my $opt (keys %$options) {
2002 $raw .= "$opt: $options->{$opt}\n";
2003 }
2004 $raw .= "\n";
68c90e21
DM
2005
2006 return $raw;
464f933e
DM
2007};
2008
2009sub save_vmfw_conf {
2010 my ($vmid, $vmfw_conf) = @_;
2011
2012 my $raw = '';
2013
2014 my $options = $vmfw_conf->{options};
68c90e21 2015 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2016
464f933e
DM
2017 my $rules = $vmfw_conf->{rules};
2018 if (scalar(@$rules)) {
2019 $raw .= "[RULES]\n\n";
2020 $raw .= &$format_rules($rules, 1);
2021 $raw .= "\n";
2022 }
2023
2024 my $filename = "/etc/pve/firewall/$vmid.fw";
2025 PVE::Tools::file_set_contents($filename, $raw);
2026}
2027
6fc63ffd 2028sub read_vm_firewall_configs {
5e1267a5 2029 my ($vmdata) = @_;
6fc63ffd 2030 my $vmfw_configs = {};
c8301d63 2031
5e1267a5 2032 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
e7b35711
DM
2033 my $vmfw_conf = load_vmfw_conf($vmid);
2034 next if !$vmfw_conf->{options}; # skip if file does not exists
2035 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM
2036 }
2037
6fc63ffd 2038 return $vmfw_configs;
5e1267a5
DM
2039}
2040
2d404ffc
DM
2041sub get_option_log_level {
2042 my ($options, $k) = @_;
2043
2044 my $v = $options->{$k};
178a63be 2045 $v = $default_log_level if !defined($v);
2d404ffc
DM
2046
2047 return undef if $v eq '' || $v eq 'nolog';
2048
2049 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2050
2051 return $v if ($v >= 0) && ($v <= 7);
2052
2053 warn "unknown log level ($k = '$v')\n";
2054
2055 return undef;
2056}
2057
d8f2505e 2058sub generate_std_chains {
2d404ffc 2059 my ($ruleset, $options) = @_;
cbb5d6f3 2060
2d404ffc
DM
2061 my $loglevel = get_option_log_level($options, 'smurf_log_level');
2062
2063 # same as shorewall smurflog.
782c4cde
DM
2064 my $chain = 'PVEFW-smurflog';
2065
2066 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2067 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM
2068
2069 # same as shorewall logflags action.
2070 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM
2071 $chain = 'PVEFW-logflags';
2072 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2073 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2074 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM
2075
2076 foreach my $chain (keys %$pve_std_chains) {
2077 ruleset_create_chain($ruleset, $chain);
2078 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2079 if (ref($rule)) {
2080 ruleset_generate_rule($ruleset, $chain, $rule);
2081 } else {
2082 ruleset_addrule($ruleset, $chain, $rule);
2083 }
2084 }
2085 }
2086}
2087
34cdedfa 2088sub generate_ipset_chains {
dd7a13fd 2089 my ($ipset_ruleset, $fw_conf) = @_;
34cdedfa 2090
dd7a13fd 2091 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
4b96e877 2092 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
34cdedfa
AD
2093 }
2094}
2095
2096sub generate_ipset {
2097 my ($ipset_ruleset, $name, $options) = @_;
2098
dd7a13fd
DM
2099 my $hashsize = scalar(@$options);
2100 if ($hashsize <= 64) {
2a052ee3 2101 $hashsize = 64;
dd7a13fd 2102 } else {
2a052ee3
AD
2103 $hashsize = round_powerof2($hashsize);
2104 }
2105
dd7a13fd 2106 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
34cdedfa 2107
dd7a13fd 2108 foreach my $ip (@$options) {
34cdedfa
AD
2109 push @{$ipset_ruleset->{$name}}, "add $name $ip";
2110 }
2a052ee3
AD
2111}
2112
2113sub round_powerof2 {
dd7a13fd 2114 my ($int) = @_;
2a052ee3 2115
dd7a13fd
DM
2116 $int--;
2117 $int |= $int >> $_ foreach (1,2,4,8,16);
2118 return ++$int;
34cdedfa
AD
2119}
2120
6b9f68a2
DM
2121sub save_pvefw_status {
2122 my ($status) = @_;
2123
2124 die "unknown status '$status' - internal error"
2125 if $status !~ m/^(stopped|active)$/;
2126
2127 mkdir dirname($pve_fw_status_filename);
2128 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2129}
2130
2131sub read_pvefw_status {
2132
2133 my $status = 'unknown';
2134
2135 return 'stopped' if ! -f $pve_fw_status_filename;
2136
2137 eval {
2138 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2139 };
2140 warn $@ if $@;
2141
2142 return $status;
2143}
2144
530c005e
DM
2145# fixme: move to pve-common PVE::ProcFSTools
2146sub read_proc_net_route {
2147 my $filename = "/proc/net/route";
2148
2149 my $res = {};
2150
2151 my $fh = IO::File->new ($filename, "r");
2152 return $res if !$fh;
2153
2154 my $int_to_quad = sub {
2155 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2156 };
2157
2158 while (defined(my $line = <$fh>)) {
2159 next if $line =~/^Iface\s+Destination/; # skip head
2160 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2161 push @{$res->{$iface}}, {
2162 dest => &$int_to_quad(hex($dest)),
2163 gateway => &$int_to_quad(hex($gateway)),
2164 mask => &$int_to_quad(hex($mask)),
2165 metric => $metric,
2166 mtu => $mtu,
2167 };
2168 }
2169
2170 return $res;
2171}
2172
fca39c2c 2173sub load_clusterfw_conf {
530c005e 2174
fca39c2c
DM
2175 my $cluster_conf = {};
2176 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
c6f5cc88 2177 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
51bae274 2178 }
5e1267a5 2179
fca39c2c 2180 return $cluster_conf;
e5d76bde
DM
2181}
2182
fca39c2c
DM
2183sub save_clusterfw_conf {
2184 my ($cluster_conf) = @_;
9c7e0858
DM
2185
2186 my $raw = '';
9c7e0858 2187
c6f5cc88 2188 my $options = $cluster_conf->{options};
68c90e21 2189 $raw .= &$format_options($options) if scalar(keys %$options);
9c7e0858 2190
c6f5cc88
DM
2191 # fixme: save ipset
2192
2193 my $rules = $cluster_conf->{rules};
2194 if (scalar(@$rules)) {
2195 $raw .= "[RULES]\n\n";
63c91681 2196 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM
2197 $raw .= "\n";
2198 }
2199
2200 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2201 my $rules = $cluster_conf->{groups}->{$group};
2202 $raw .= "[group $group]\n\n";
63c91681 2203 $raw .= &$format_rules($rules, 0);
9c7e0858
DM
2204 $raw .= "\n";
2205 }
2206
fca39c2c 2207 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM
2208}
2209
8b27beb9
DM
2210sub load_hostfw_conf {
2211
2212 my $hostfw_conf = {};
63c91681
DM
2213 if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2214 $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
8b27beb9
DM
2215 }
2216 return $hostfw_conf;
2217}
2218
63c91681
DM
2219sub save_hostfw_conf {
2220 my ($hostfw_conf) = @_;
2221
2222 my $raw = '';
2223
2224 my $options = $hostfw_conf->{options};
68c90e21 2225 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2226
63c91681
DM
2227 my $rules = $hostfw_conf->{rules};
2228 if (scalar(@$rules)) {
2229 $raw .= "[RULES]\n\n";
2230 $raw .= &$format_rules($rules, 1);
2231 $raw .= "\n";
2232 }
2233
2234 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2235}
2236
e5d76bde
DM
2237sub compile {
2238 my $vmdata = read_local_vm_config();
2239 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2240
2241 my $routing_table = read_proc_net_route();
2242
fca39c2c 2243 my $cluster_conf = load_clusterfw_conf();
e5d76bde 2244
34cdedfa 2245 my $ipset_ruleset = {};
fca39c2c 2246 generate_ipset_chains($ipset_ruleset, $cluster_conf);
34cdedfa 2247
3fa83edf
DM
2248 my $ruleset = {};
2249
dec84fcd
DM
2250 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2251 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2252
fadb13dd 2253 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 2254
8b27beb9
DM
2255 my $hostfw_conf = load_hostfw_conf();
2256 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2257
92e976b3 2258 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2259
6d2ab017 2260 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2261
fca39c2c 2262 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
3fa83edf 2263
6158271d 2264 # generate firewall rules for QEMU VMs
3fa83edf
DM
2265 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2266 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 2267 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM
2268 next if !$vmfw_conf;
2269 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM
2270
2271 foreach my $netid (keys %$conf) {
2272 next if $netid !~ m/^net(\d+)$/;
2273 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2274 next if !$net;
2275 my $iface = "tap${vmid}i$1";
5e1267a5 2276
3fa83edf
DM
2277 my $bridge = $net->{bridge};
2278 next if !$bridge; # fixme: ?
2279
2280 $bridge .= "v$net->{tag}" if $net->{tag};
2281
530c005e 2282 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 2283
c29f55c9 2284 my $macaddr = $net->{macaddr};
cbb5d6f3 2285 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2286 $vmfw_conf, $vmid, $bridge, 'IN');
cbb5d6f3 2287 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2288 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM
2289 }
2290 }
c8301d63
DM
2291
2292 # generate firewall rules for OpenVZ containers
2293 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2294 my $conf = $vmdata->{openvz}->{$vmid};
2295
2296 my $vmfw_conf = $vmfw_configs->{$vmid};
2297 next if !$vmfw_conf;
2298 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2299
2300 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2301 my $ip = $conf->{ip_address}->{value};
fca39c2c
DM
2302 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2303 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM
2304 }
2305
2306 if ($conf->{netif} && $conf->{netif}->{value}) {
2307 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM
2308 foreach my $netid (keys %$netif) {
2309 my $d = $netif->{$netid};
2310 my $bridge = $d->{bridge};
2311 if (!$bridge) {
2312 warn "no bridge device for CT $vmid iface '$netid'\n";
2313 next; # fixme?
2314 }
cbb5d6f3 2315
530c005e
DM
2316 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2317
12d0f130 2318 my $macaddr = $d->{mac};
c8301d63 2319 my $iface = $d->{host_ifname};
cbb5d6f3 2320 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2321 $vmfw_conf, $vmid, $bridge, 'IN');
cbb5d6f3 2322 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2323 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM
2324 }
2325 }
2326 }
c0413e35 2327
cc10e5d7 2328 if($hostfw_options->{optimize}){
da6fc60b 2329
e9d9a73e 2330 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
da6fc60b 2331 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
cc10e5d7
AD
2332 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2333 }
2334
eba0fb64
DM
2335 # fixme: what log level should we use here?
2336 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2337
c98c037d
DM
2338 # fixme: should we really block inter-bridge traffic?
2339
2340 # always allow traffic from containers?
2341 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2342
eba0fb64 2343 # disable interbridge routing
cbb5d6f3 2344 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
eba0fb64 2345 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
cbb5d6f3
DM
2346 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2347 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2348 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
eba0fb64
DM
2349 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2350
34cdedfa 2351 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
3fa83edf
DM
2352}
2353
2354sub get_ruleset_status {
4bd0a9c4 2355 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM
2356
2357 my $statushash = {};
2358
2359 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 2360 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 2361
3fa83edf
DM
2362 $statushash->{$chain}->{sig} = $sig;
2363
2364 my $oldsig = $active_chains->{$chain};
2365 if (!defined($oldsig)) {
2366 $statushash->{$chain}->{action} = 'create';
2367 } else {
2368 if ($oldsig eq $sig) {
2369 $statushash->{$chain}->{action} = 'exists';
2370 } else {
2371 $statushash->{$chain}->{action} = 'update';
2372 }
2373 }
2374 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2375 foreach my $cmd (@{$ruleset->{$chain}}) {
2376 print "\t$cmd\n" if $verbose;
2377 }
2378 }
2379
2380 foreach my $chain (sort keys %$active_chains) {
2381 if (!defined($ruleset->{$chain})) {
2382 my $sig = $active_chains->{$chain};
2383 $statushash->{$chain}->{action} = 'delete';
2384 $statushash->{$chain}->{sig} = $sig;
2385 print "delete $chain ($sig)\n" if $verbose;
2386 }
6158271d 2387 }
2a052ee3 2388
3fa83edf
DM
2389 return $statushash;
2390}
2391
3fa83edf
DM
2392sub print_sig_rule {
2393 my ($chain, $sig) = @_;
2394
09d5f68e
DM
2395 # We just use this to store a SHA1 checksum used to detect changes
2396 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM
2397}
2398
df7cb349 2399sub get_ruleset_cmdlist {
a84f4d96 2400 my ($ruleset, $verbose) = @_;
3fa83edf 2401
3fa83edf 2402 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 2403
4bd0a9c4
DM
2404 my ($active_chains, $hooks) = iptables_get_chains();
2405 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM
2406
2407 # create missing chains first
2408 foreach my $chain (sort keys %$ruleset) {
2409 my $stat = $statushash->{$chain};
2410 die "internal error" if !$stat;
2411 next if $stat->{action} ne 'create';
886aba9c 2412
3fa83edf
DM
2413 $cmdlist .= ":$chain - [0:0]\n";
2414 }
2415
4bd0a9c4
DM
2416 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2417 if (!$hooks->{$h}) {
2418 $cmdlist .= "-A $h -j PVEFW-$h\n";
2419 }
3fa83edf
DM
2420 }
2421
2422 foreach my $chain (sort keys %$ruleset) {
2423 my $stat = $statushash->{$chain};
2424 die "internal error" if !$stat;
2425
2426 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2427 $cmdlist .= "-F $chain\n";
2428 foreach my $cmd (@{$ruleset->{$chain}}) {
2429 $cmdlist .= "$cmd\n";
2430 }
2431 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2432 } elsif ($stat->{action} eq 'delete') {
f5d28682 2433 die "internal error"; # this should not happen
3fa83edf
DM
2434 } elsif ($stat->{action} eq 'exists') {
2435 # do nothing
2436 } else {
2437 die "internal error - unknown status '$stat->{action}'";
2438 }
2439 }
2440
f5d28682
DM
2441 foreach my $chain (keys %$statushash) {
2442 next if $statushash->{$chain}->{action} ne 'delete';
2443 $cmdlist .= "-F $chain\n";
2444 }
2445 foreach my $chain (keys %$statushash) {
2446 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM
2447 next if $chain eq 'PVEFW-INPUT';
2448 next if $chain eq 'PVEFW-OUTPUT';
2449 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM
2450 $cmdlist .= "-X $chain\n";
2451 }
2452
3f95d14a 2453 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 2454
3fa83edf
DM
2455 $cmdlist .= "COMMIT\n";
2456
3f95d14a 2457 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM
2458}
2459
34cdedfa 2460sub get_ipset_cmdlist {
dd7a13fd 2461 my ($ruleset, $verbose) = @_;
34cdedfa
AD
2462
2463 my $cmdlist = "";
2464
dd7a13fd
DM
2465 my $delete_cmdlist = "";
2466
4bd0a9c4
DM
2467 my $active_chains = ipset_get_chains();
2468 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 2469
dd7a13fd
DM
2470 foreach my $chain (sort keys %$ruleset) {
2471 my $stat = $statushash->{$chain};
2472 die "internal error" if !$stat;
2a052ee3 2473
dd7a13fd
DM
2474 if ($stat->{action} eq 'create') {
2475 foreach my $cmd (@{$ruleset->{$chain}}) {
34cdedfa
AD
2476 $cmdlist .= "$cmd\n";
2477 }
dd7a13fd 2478 }
34cdedfa 2479
dd7a13fd
DM
2480 if ($stat->{action} eq 'update') {
2481 my $chain_swap = $chain."_swap";
cbb5d6f3 2482
dd7a13fd
DM
2483 foreach my $cmd (@{$ruleset->{$chain}}) {
2484 $cmd =~ s/$chain/$chain_swap/;
2485 $cmdlist .= "$cmd\n";
34cdedfa 2486 }
dd7a13fd
DM
2487 $cmdlist .= "swap $chain_swap $chain\n";
2488 $cmdlist .= "flush $chain_swap\n";
2489 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 2490 }
34cdedfa 2491
dd7a13fd 2492 }
3f95d14a 2493
dd7a13fd
DM
2494 foreach my $chain (keys %$statushash) {
2495 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 2496
dd7a13fd
DM
2497 $delete_cmdlist .= "flush $chain\n";
2498 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD
2499 }
2500
dd7a13fd 2501 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 2502
dd7a13fd 2503 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD
2504}
2505
6b9f68a2 2506sub apply_ruleset {
34cdedfa 2507 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM
2508
2509 enable_bridge_firewall();
2510
edb75ba9
DM
2511 update_nf_conntrack_max($hostfw_conf);
2512
cbb5d6f3 2513 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
81a0bf43 2514 get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
6b9f68a2 2515
81a0bf43 2516 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2a052ee3 2517
81a0bf43
DM
2518 if ($verbose) {
2519 if ($ipset_changes) {
2520 print "ipset changes:\n";
2521 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2522 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2523 }
3f95d14a 2524
81a0bf43
DM
2525 if ($changes) {
2526 print "iptables changes:\n";
2527 print $cmdlist;
2528 }
2529 }
3fa83edf 2530
2a052ee3 2531 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 2532
3fa83edf
DM
2533 iptables_restore_cmdlist($cmdlist);
2534
dd7a13fd 2535 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 2536
6158271d 2537 # test: re-read status and check if everything is up to date
4bd0a9c4 2538 my $active_chains = iptables_get_chains();
81a0bf43 2539 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3fa83edf
DM
2540
2541 my $errors;
2542 foreach my $chain (sort keys %$ruleset) {
2543 my $stat = $statushash->{$chain};
2544 if ($stat->{action} ne 'exists') {
2545 warn "unable to update chain '$chain'\n";
2546 $errors = 1;
2547 }
2548 }
b6360c3f 2549
3fa83edf 2550 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM
2551}
2552
490cdead
DM
2553sub update_nf_conntrack_max {
2554 my ($hostfw_conf) = @_;
2555
2556 my $max = 65536; # reasonable default
2557
2558 my $options = $hostfw_conf->{options} || {};
2559
2560 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2561 $max = $options->{nf_conntrack_max};
2562 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2563 }
2564
2565 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2566 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2567
2568 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2569
2570 if ($current != $max) {
2571 my $hashsize = int($max/4);
2572 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2573 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2574 }
2575}
2576
c4a2e5ae
DM
2577sub remove_pvefw_chains {
2578
2579 my ($chash, $hooks) = iptables_get_chains();
2580 my $cmdlist = "*filter\n";
2581
2582 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2583 if ($hooks->{$h}) {
2584 $cmdlist .= "-D $h -j PVEFW-$h\n";
2585 }
2586 }
cbb5d6f3 2587
c4a2e5ae
DM
2588 foreach my $chain (keys %$chash) {
2589 $cmdlist .= "-F $chain\n";
2590 }
2591
2592 foreach my $chain (keys %$chash) {
2593 $cmdlist .= "-X $chain\n";
2594 }
2595 $cmdlist .= "COMMIT\n";
2596
2597 iptables_restore_cmdlist($cmdlist);
2598}
2599
6b9f68a2
DM
2600sub update {
2601 my ($start, $verbose) = @_;
2602
2603 my $code = sub {
2604 my $status = read_pvefw_status();
2605
3f95d14a 2606 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
490cdead 2607
6b9f68a2
DM
2608 if ($start || $status eq 'active') {
2609
2610 save_pvefw_status('active') if ($status ne 'active');
2611
34cdedfa 2612 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM
2613 } else {
2614 print "Firewall not active (status = $status)\n" if $verbose;
2615 }
2616 };
2617
2618 run_locked($code);
2619}
2620
2621
b6360c3f 26221;