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birectionnal macros cleanups
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
cbb5d6f3 5use POSIX;
b6360c3f 6use Data::Dumper;
09d5f68e 7use Digest::SHA;
c8301d63 8use PVE::INotify;
7ca36671 9use PVE::Exception qw(raise raise_param_exc);
e74a87f5 10use PVE::JSONSchema qw(register_standard_option get_standard_option);
c8301d63 11use PVE::Cluster;
5f0a912c 12use PVE::ProcFSTools;
009ee3ac 13use PVE::Tools qw($IPV4RE);
6b9f68a2 14use File::Basename;
5e1267a5
DM		 15use File::Path;
16use IO::File;
ecbea048 17use Net::IP;
1a301a8d 18use PVE::Tools qw(run_command lock_file dir_glob_foreach);
30c1ae52 19use Encode;
ecbea048 20
63c91681 21my $hostfw_conf_filename = "/etc/pve/local/host.fw";
fca39c2c
DM		 22my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
23
cbb5d6f3 24# dynamically include PVE::QemuServer and PVE::OpenVZ
d9fee004
DM		 25# to avoid dependency problems
26my $have_qemu_server;
27eval {
28 require PVE::QemuServer;
29 $have_qemu_server = 1;
30};
31
32my $have_pve_manager;
33eval {
34 require PVE::OpenVZ;
35 $have_pve_manager = 1;
36};
37
009ee3ac
DM		 38PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
39sub pve_verify_ipv4_or_cidr {
40 my ($cidr, $noerr) = @_;
41
30f1b100 42 if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
e34d0e58 43 return $cidr if Net::IP->new($cidr);
30f1b100
DM		 44 return undef if $noerr;
45 die Net::IP::Error() . "\n";
009ee3ac
DM		 46 }
47 return undef if $noerr;
48 die "value does not look like a valid IP address or CIDR network\n";
49}
50
e74a87f5
DM		 51PVE::JSONSchema::register_standard_option('ipset-name', {
52 description => "IP set name.",
53 type => 'string',
54 pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
387d0ffc 55 minLength => 2,
e34d0e58 56 maxLength => 20,
387d0ffc
DM		 57});
58
81d574a7
DM		 59PVE::JSONSchema::register_standard_option('pve-fw-alias', {
60 description => "Alias name.",
61 type => 'string',
62 pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
63 minLength => 2,
e34d0e58 64 maxLength => 20,
81d574a7
DM		 65});
66
6302c41f
DM		 67PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
68 description => "Log level.",
e34d0e58 69 type => 'string',
6302c41f
DM		 70 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
71 optional => 1,
72});
73
44be8ceb
DM		 74my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
75my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
c14dacdf 76
387d0ffc
DM		 77PVE::JSONSchema::register_standard_option('pve-security-group-name', {
78 description => "Security Group name.",
79 type => 'string',
44be8ceb 80 pattern => $security_group_name_pattern,
387d0ffc 81 minLength => 2,
e34d0e58 82 maxLength => 20,
e74a87f5 83});
009ee3ac 84
cbb5d6f3
DM		 85my $feature_ipset_nomatch = 0;
86eval {
87 my (undef, undef, $release) = POSIX::uname();
88 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
89 my ($major, $minor) = ($1, $2);
90 $feature_ipset_nomatch = 1 if ($major > 3) ||
91 ($major == 3 && $minor >= 7);
92 }
93
94};
95
5e1267a5 96use Data::Dumper;
b6360c3f 97
c8301d63
DM		 98my $nodename = PVE::INotify::nodename();
99
06320eb0
DM		 100my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
101
2d404ffc
DM		 102my $default_log_level = 'info';
103
104my $log_level_hash = {
105 debug => 7,
106 info => 6,
107 notice => 5,
108 warning => 4,
109 err => 3,
110 crit => 2,
111 alert => 1,
112 emerg => 0,
113};
114
857f62c8 115# imported/converted from: /usr/share/shorewall/macro.*
961b4928 116my $pve_fw_macros = {
857f62c8 117 'Amanda' => [
ebd54ae9 118 "Amanda Backup",
857f62c8
DM		 119 { action => 'PARAM', proto => 'udp', dport => '10080' },
120 { action => 'PARAM', proto => 'tcp', dport => '10080' },
121 ],
122 'Auth' => [
ebd54ae9 123 "Auth (identd) traffic",
857f62c8
DM		 124 { action => 'PARAM', proto => 'tcp', dport => '113' },
125 ],
126 'BGP' => [
ebd54ae9 127 "Border Gateway Protocol traffic",
857f62c8
DM		 128 { action => 'PARAM', proto => 'tcp', dport => '179' },
129 ],
130 'BitTorrent' => [
ebd54ae9 131 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 132 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 133 { action => 'PARAM', proto => 'udp', dport => '6881' },
134 ],
135 'BitTorrent32' => [
ebd54ae9 136 "BitTorrent traffic for BitTorrent 3.2 and later",
857f62c8
DM		 137 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
138 { action => 'PARAM', proto => 'udp', dport => '6881' },
139 ],
140 'CVS' => [
ebd54ae9 141 "Concurrent Versions System pserver traffic",
857f62c8
DM		 142 { action => 'PARAM', proto => 'tcp', dport => '2401' },
143 ],
144 'Citrix' => [
ebd54ae9 145 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 146 { action => 'PARAM', proto => 'tcp', dport => '1494' },
147 { action => 'PARAM', proto => 'udp', dport => '1604' },
148 { action => 'PARAM', proto => 'tcp', dport => '2598' },
149 ],
150 'DAAP' => [
ebd54ae9 151 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 152 { action => 'PARAM', proto => 'tcp', dport => '3689' },
153 { action => 'PARAM', proto => 'udp', dport => '3689' },
154 ],
155 'DCC' => [
ebd54ae9 156 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 157 { action => 'PARAM', proto => 'tcp', dport => '6277' },
158 ],
159 'DHCPfwd' => [
d2c3266d 160 "Forwarded DHCP traffic",
857f62c8 161 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 162 ],
163 'DNS' => [
ebd54ae9 164 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 165 { action => 'PARAM', proto => 'udp', dport => '53' },
166 { action => 'PARAM', proto => 'tcp', dport => '53' },
167 ],
168 'Distcc' => [
ebd54ae9 169 "Distributed Compiler service",
857f62c8
DM		 170 { action => 'PARAM', proto => 'tcp', dport => '3632' },
171 ],
857f62c8 172 'FTP' => [
ebd54ae9 173 "File Transfer Protocol",
857f62c8
DM		 174 { action => 'PARAM', proto => 'tcp', dport => '21' },
175 ],
176 'Finger' => [
ebd54ae9 177 "Finger protocol (RFC 742)",
857f62c8
DM		 178 { action => 'PARAM', proto => 'tcp', dport => '79' },
179 ],
180 'GNUnet' => [
ebd54ae9 181 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 182 { action => 'PARAM', proto => 'tcp', dport => '2086' },
183 { action => 'PARAM', proto => 'udp', dport => '2086' },
184 { action => 'PARAM', proto => 'tcp', dport => '1080' },
185 { action => 'PARAM', proto => 'udp', dport => '1080' },
186 ],
187 'GRE' => [
d2c3266d 188 "Generic Routing Encapsulation tunneling protocol",
857f62c8 189 { action => 'PARAM', proto => '47' },
857f62c8
DM		 190 ],
191 'Git' => [
ebd54ae9 192 "Git distributed revision control traffic",
857f62c8
DM		 193 { action => 'PARAM', proto => 'tcp', dport => '9418' },
194 ],
857f62c8 195 'HKP' => [
ebd54ae9 196 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 197 { action => 'PARAM', proto => 'tcp', dport => '11371' },
198 ],
199 'HTTP' => [
ebd54ae9 200 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 201 { action => 'PARAM', proto => 'tcp', dport => '80' },
202 ],
857f62c8 203 'HTTPS' => [
ebd54ae9 204 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 205 { action => 'PARAM', proto => 'tcp', dport => '443' },
206 ],
207 'ICPV2' => [
ebd54ae9 208 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 209 { action => 'PARAM', proto => 'udp', dport => '3130' },
210 ],
211 'ICQ' => [
ebd54ae9 212 "AOL Instant Messenger traffic",
857f62c8
DM		 213 { action => 'PARAM', proto => 'tcp', dport => '5190' },
214 ],
215 'IMAP' => [
ebd54ae9 216 "Internet Message Access Protocol",
857f62c8
DM		 217 { action => 'PARAM', proto => 'tcp', dport => '143' },
218 ],
219 'IMAPS' => [
ebd54ae9 220 "Internet Message Access Protocol over SSL",
857f62c8
DM		 221 { action => 'PARAM', proto => 'tcp', dport => '993' },
222 ],
223 'IPIP' => [
d2c3266d 224 "IPIP capsulation traffic",
857f62c8 225 { action => 'PARAM', proto => '94' },
857f62c8 226 ],
857f62c8 227 'IPsec' => [
d2c3266d 228 "IPsec traffic",
857f62c8
DM		 229 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
230 { action => 'PARAM', proto => '50' },
857f62c8
DM		 231 ],
232 'IPsecah' => [
d2c3266d 233 "IPsec authentication (AH) traffic",
857f62c8
DM		 234 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
235 { action => 'PARAM', proto => '51' },
857f62c8
DM		 236 ],
237 'IPsecnat' => [
d2c3266d 238 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 239 { action => 'PARAM', proto => 'udp', dport => '500' },
240 { action => 'PARAM', proto => 'udp', dport => '4500' },
241 { action => 'PARAM', proto => '50' },
857f62c8
DM		 242 ],
243 'IRC' => [
ebd54ae9 244 "Internet Relay Chat traffic",
857f62c8
DM		 245 { action => 'PARAM', proto => 'tcp', dport => '6667' },
246 ],
857f62c8 247 'Jetdirect' => [
ebd54ae9 248 "HP Jetdirect printing",
857f62c8
DM		 249 { action => 'PARAM', proto => 'tcp', dport => '9100' },
250 ],
251 'L2TP' => [
ebd54ae9 252 "Layer 2 Tunneling Protocol traffic",
857f62c8 253 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 254 ],
255 'LDAP' => [
ebd54ae9 256 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 257 { action => 'PARAM', proto => 'tcp', dport => '389' },
258 ],
259 'LDAPS' => [
ebd54ae9 260 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 261 { action => 'PARAM', proto => 'tcp', dport => '636' },
262 ],
263 'MSNP' => [
ebd54ae9 264 "Microsoft Notification Protocol",
857f62c8
DM		 265 { action => 'PARAM', proto => 'tcp', dport => '1863' },
266 ],
267 'MSSQL' => [
ebd54ae9 268 "Microsoft SQL Server",
857f62c8
DM		 269 { action => 'PARAM', proto => 'tcp', dport => '1433' },
270 ],
271 'Mail' => [
ebd54ae9 272 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 273 { action => 'PARAM', proto => 'tcp', dport => '25' },
274 { action => 'PARAM', proto => 'tcp', dport => '465' },
275 { action => 'PARAM', proto => 'tcp', dport => '587' },
276 ],
277 'Munin' => [
ebd54ae9 278 "Munin networked resource monitoring traffic",
857f62c8
DM		 279 { action => 'PARAM', proto => 'tcp', dport => '4949' },
280 ],
281 'MySQL' => [
ebd54ae9 282 "MySQL server",
857f62c8
DM		 283 { action => 'PARAM', proto => 'tcp', dport => '3306' },
284 ],
285 'NNTP' => [
ebd54ae9 286 "NNTP traffic (Usenet).",
857f62c8
DM		 287 { action => 'PARAM', proto => 'tcp', dport => '119' },
288 ],
289 'NNTPS' => [
ebd54ae9 290 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 291 { action => 'PARAM', proto => 'tcp', dport => '563' },
292 ],
293 'NTP' => [
ebd54ae9 294 "Network Time Protocol (ntpd)",
857f62c8
DM		 295 { action => 'PARAM', proto => 'udp', dport => '123' },
296 ],
857f62c8 297 'OSPF' => [
ebd54ae9 298 "OSPF multicast traffic",
857f62c8
DM		 299 { action => 'PARAM', proto => '89' },
300 ],
301 'OpenVPN' => [
ebd54ae9 302 "OpenVPN traffic",
857f62c8
DM		 303 { action => 'PARAM', proto => 'udp', dport => '1194' },
304 ],
305 'PCA' => [
ebd54ae9 306 "Symantec PCAnywere (tm)",
857f62c8
DM		 307 { action => 'PARAM', proto => 'udp', dport => '5632' },
308 { action => 'PARAM', proto => 'tcp', dport => '5631' },
309 ],
310 'POP3' => [
ebd54ae9 311 "POP3 traffic",
857f62c8
DM		 312 { action => 'PARAM', proto => 'tcp', dport => '110' },
313 ],
314 'POP3S' => [
ebd54ae9 315 "Encrypted POP3 traffic",
857f62c8
DM		 316 { action => 'PARAM', proto => 'tcp', dport => '995' },
317 ],
318 'PPtP' => [
ebd54ae9 319 "Point-to-Point Tunneling Protocol",
857f62c8 320 { action => 'PARAM', proto => '47' },
857f62c8
DM		 321 { action => 'PARAM', proto => 'tcp', dport => '1723' },
322 ],
323 'Ping' => [
ebd54ae9 324 "ICMP echo request",
269d4f13 325 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 326 ],
327 'PostgreSQL' => [
ebd54ae9 328 "PostgreSQL server",
857f62c8
DM		 329 { action => 'PARAM', proto => 'tcp', dport => '5432' },
330 ],
331 'Printer' => [
ebd54ae9 332 "Line Printer protocol printing",
857f62c8
DM		 333 { action => 'PARAM', proto => 'tcp', dport => '515' },
334 ],
335 'RDP' => [
ebd54ae9 336 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 337 { action => 'PARAM', proto => 'tcp', dport => '3389' },
338 ],
d2c3266d 339 'RIP' => [
ebd54ae9 340 "Routing Information Protocol (bidirectional)",
857f62c8 341 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 342 ],
343 'RNDC' => [
ebd54ae9 344 "BIND remote management protocol",
857f62c8
DM		 345 { action => 'PARAM', proto => 'tcp', dport => '953' },
346 ],
347 'Razor' => [
ebd54ae9 348 "Razor Antispam System",
857f62c8
DM		 349 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
350 ],
351 'Rdate' => [
ebd54ae9 352 "Remote time retrieval (rdate)",
857f62c8
DM		 353 { action => 'PARAM', proto => 'tcp', dport => '37' },
354 ],
355 'Rsync' => [
ebd54ae9 356 "Rsync server",
857f62c8
DM		 357 { action => 'PARAM', proto => 'tcp', dport => '873' },
358 ],
359 'SANE' => [
ebd54ae9 360 "SANE network scanning",
857f62c8
DM		 361 { action => 'PARAM', proto => 'tcp', dport => '6566' },
362 ],
363 'SMB' => [
ebd54ae9 364 "Microsoft SMB traffic",
857f62c8
DM		 365 { action => 'PARAM', proto => 'udp', dport => '135,445' },
366 { action => 'PARAM', proto => 'udp', dport => '137:139' },
367 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
368 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
369 ],
857f62c8 370 'SMBswat' => [
ebd54ae9 371 "Samba Web Administration Tool",
857f62c8
DM		 372 { action => 'PARAM', proto => 'tcp', dport => '901' },
373 ],
374 'SMTP' => [
ebd54ae9 375 "Simple Mail Transfer Protocol",
857f62c8
DM		 376 { action => 'PARAM', proto => 'tcp', dport => '25' },
377 ],
378 'SMTPS' => [
ebd54ae9 379 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 380 { action => 'PARAM', proto => 'tcp', dport => '465' },
381 ],
382 'SNMP' => [
ebd54ae9 383 "Simple Network Management Protocol",
857f62c8
DM		 384 { action => 'PARAM', proto => 'udp', dport => '161:162' },
385 { action => 'PARAM', proto => 'tcp', dport => '161' },
386 ],
387 'SPAMD' => [
ebd54ae9 388 "Spam Assassin SPAMD traffic",
857f62c8
DM		 389 { action => 'PARAM', proto => 'tcp', dport => '783' },
390 ],
391 'SSH' => [
ebd54ae9 392 "Secure shell traffic",
857f62c8
DM		 393 { action => 'PARAM', proto => 'tcp', dport => '22' },
394 ],
395 'SVN' => [
ebd54ae9 396 "Subversion server (svnserve)",
857f62c8
DM		 397 { action => 'PARAM', proto => 'tcp', dport => '3690' },
398 ],
399 'SixXS' => [
ebd54ae9 400 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 401 { action => 'PARAM', proto => 'tcp', dport => '3874' },
402 { action => 'PARAM', proto => 'udp', dport => '3740' },
403 { action => 'PARAM', proto => '41' },
404 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
405 ],
406 'Squid' => [
ebd54ae9 407 "Squid web proxy traffic",
857f62c8
DM		 408 { action => 'PARAM', proto => 'tcp', dport => '3128' },
409 ],
410 'Submission' => [
ebd54ae9 411 "Mail message submission traffic",
857f62c8
DM		 412 { action => 'PARAM', proto => 'tcp', dport => '587' },
413 ],
414 'Syslog' => [
ebd54ae9 415 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 416 { action => 'PARAM', proto => 'udp', dport => '514' },
417 { action => 'PARAM', proto => 'tcp', dport => '514' },
418 ],
419 'TFTP' => [
ebd54ae9 420 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 421 { action => 'PARAM', proto => 'udp', dport => '69' },
422 ],
423 'Telnet' => [
ebd54ae9 424 "Telnet traffic",
857f62c8
DM		 425 { action => 'PARAM', proto => 'tcp', dport => '23' },
426 ],
427 'Telnets' => [
ebd54ae9 428 "Telnet over SSL",
857f62c8
DM		 429 { action => 'PARAM', proto => 'tcp', dport => '992' },
430 ],
431 'Time' => [
ebd54ae9 432 "RFC 868 Time protocol",
857f62c8
DM		 433 { action => 'PARAM', proto => 'tcp', dport => '37' },
434 ],
435 'Trcrt' => [
ebd54ae9 436 "Traceroute (for up to 30 hops) traffic",
857f62c8 437 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 438 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 439 ],
440 'VNC' => [
ebd54ae9 441 "VNC traffic for VNC display's 0 - 9",
857f62c8
DM		 442 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
443 ],
444 'VNCL' => [
ebd54ae9 445 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 446 { action => 'PARAM', proto => 'tcp', dport => '5500' },
447 ],
448 'Web' => [
ebd54ae9 449 "WWW traffic (HTTP and HTTPS)",
857f62c8 450 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 451 { action => 'PARAM', proto => 'tcp', dport => '443' },
452 ],
857f62c8 453 'Webcache' => [
ebd54ae9 454 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 455 { action => 'PARAM', proto => 'tcp', dport => '8080' },
456 ],
457 'Webmin' => [
ebd54ae9 458 "Webmin traffic",
857f62c8
DM		 459 { action => 'PARAM', proto => 'tcp', dport => '10000' },
460 ],
461 'Whois' => [
ebd54ae9 462 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 463 { action => 'PARAM', proto => 'tcp', dport => '43' },
464 ],
961b4928
DM		 465};
466
467my $pve_fw_parsed_macros;
ebd54ae9 468my $pve_fw_macro_descr;
961b4928 469my $pve_fw_preferred_macro_names = {};
3a616aa0 470
d8f2505e
DM		 471my $pve_std_chains = {
472 'PVEFW-SET-ACCEPT-MARK' => [
473 "-j MARK --set-mark 1",
474 ],
79929d9c
DM		 475 'PVEFW-DropBroadcast' => [
476 # same as shorewall 'Broadcast'
477 # simply DROP BROADCAST/MULTICAST/ANYCAST
478 # we can use this to reduce logging
479 { action => 'DROP', dsttype => 'BROADCAST' },
480 { action => 'DROP', dsttype => 'MULTICAST' },
481 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 482 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 483 ],
484 'PVEFW-reject' => [
485 # same as shorewall 'reject'
486 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 487 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c
DM		 488 { action => 'DROP', proto => 'icmp' },
489 "-p tcp -j REJECT --reject-with tcp-reset",
490 "-p udp -j REJECT --reject-with icmp-port-unreachable",
491 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
492 "-j REJECT --reject-with icmp-host-prohibited",
493 ],
494 'PVEFW-Drop' => [
cbb5d6f3 495 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 496 # but REJECT/DROP some packages to reduce logging,
497 # and ACCEPT critical ICMP types
498 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
499 # we are not interested in BROADCAST/MULTICAST/ANYCAST
500 { action => 'PVEFW-DropBroadcast' },
501 # ACCEPT critical ICMP types
502 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
503 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
504 # Drop packets with INVALID state
505 "-m conntrack --ctstate INVALID -j DROP",
506 # Drop Microsoft SMB noise
507 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
508 { action => 'DROP', proto => 'udp', dport => '137:139'},
509 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
510 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
511 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
512 # Drop new/NotSyn traffic so that it doesn't get logged
513 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
514 # Drop DNS replies
515 { action => 'DROP', proto => 'udp', sport => 53 },
516 ],
517 'PVEFW-Reject' => [
cbb5d6f3 518 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 519 # but REJECT/DROP some packages to reduce logging,
520 # and ACCEPT critical ICMP types
521 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
522 # we are not interested in BROADCAST/MULTICAST/ANYCAST
523 { action => 'PVEFW-DropBroadcast' },
524 # ACCEPT critical ICMP types
525 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
526 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
527 # Drop packets with INVALID state
528 "-m conntrack --ctstate INVALID -j DROP",
529 # Drop Microsoft SMB noise
530 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
531 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
532 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
533 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
534 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
535 # Drop new/NotSyn traffic so that it doesn't get logged
536 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
537 # Drop DNS replies
538 { action => 'DROP', proto => 'udp', sport => 53 },
539 ],
d86659ef
DM		 540 'PVEFW-tcpflags' => [
541 # same as shorewall tcpflags action.
542 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
543 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
544 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
545 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
546 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
547 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
548 ],
bee633ab
DM		 549 'PVEFW-smurfs' => [
550 # same as shorewall smurfs action
551 # Filter packets for smurfs (packets with a broadcast address as the source).
552 "-s 0.0.0.0/32 -j RETURN",
553 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
554 "-s 224.0.0.0/4 -g PVEFW-smurflog",
555 ],
d8f2505e
DM		 556};
557
4b586518
DM		 558# iptables -p icmp -h
559my $icmp_type_names = {
560 any => 1,
561 'echo-reply' => 1,
562 'destination-unreachable' => 1,
563 'network-unreachable' => 1,
564 'host-unreachable' => 1,
565 'protocol-unreachable' => 1,
566 'port-unreachable' => 1,
567 'fragmentation-needed' => 1,
568 'source-route-failed' => 1,
569 'network-unknown' => 1,
570 'host-unknown' => 1,
571 'network-prohibited' => 1,
572 'host-prohibited' => 1,
573 'TOS-network-unreachable' => 1,
574 'TOS-host-unreachable' => 1,
575 'communication-prohibited' => 1,
576 'host-precedence-violation' => 1,
577 'precedence-cutoff' => 1,
578 'source-quench' => 1,
579 'redirect' => 1,
580 'network-redirect' => 1,
581 'host-redirect' => 1,
582 'TOS-network-redirect' => 1,
583 'TOS-host-redirect' => 1,
584 'echo-request' => 1,
585 'router-advertisement' => 1,
586 'router-solicitation' => 1,
587 'time-exceeded' => 1,
588 'ttl-zero-during-transit' => 1,
589 'ttl-zero-during-reassembly' => 1,
590 'parameter-problem' => 1,
591 'ip-header-bad' => 1,
592 'required-option-missing' => 1,
593 'timestamp-request' => 1,
594 'timestamp-reply' => 1,
595 'address-mask-request' => 1,
596 'address-mask-reply' => 1,
597};
598
54cd19a8 599sub init_firewall_macros {
6158271d 600
961b4928 601 $pve_fw_parsed_macros = {};
9aab3127 602
961b4928 603 foreach my $k (keys %$pve_fw_macros) {
e5076eee
DM		 604 my $lc_name = lc($k);
605 my $macro = $pve_fw_macros->{$k};
ebd54ae9
DM		 606 if (!ref($macro->[0])) {
607 $pve_fw_macro_descr->{$k} = shift @$macro;
608 }
e5076eee
DM		 609 $pve_fw_preferred_macro_names->{$lc_name} = $k;
610 $pve_fw_parsed_macros->{$k} = $macro;
961b4928 611 }
9aab3127
DM		 612}
613
54cd19a8
DM		 614init_firewall_macros();
615
ebd54ae9
DM		 616sub get_macros {
617 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
618}
619
fcba0beb
DM		 620my $etc_services;
621
622sub get_etc_services {
623
624 return $etc_services if $etc_services;
625
626 my $filename = "/etc/services";
627
628 my $fh = IO::File->new($filename, O_RDONLY);
629 if (!$fh) {
630 warn "unable to read '$filename' - $!\n";
631 return {};
632 }
633
634 my $services = {};
635
636 while (my $line = <$fh>) {
637 chomp ($line);
638 next if $line =~m/^#/;
639 next if ($line =~m/^\s*$/);
640
641 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
642 $services->{byid}->{$2}->{name} = $1;
35b66e9d 643 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 644 $services->{byid}->{$2}->{$3} = 1;
645 $services->{byname}->{$1} = $services->{byid}->{$2};
646 }
647 }
648
649 close($fh);
650
6158271d
DM		 651 $etc_services = $services;
652
3a616aa0 653
fcba0beb
DM		 654 return $etc_services;
655}
656
657my $etc_protocols;
658
659sub get_etc_protocols {
660 return $etc_protocols if $etc_protocols;
661
662 my $filename = "/etc/protocols";
663
664 my $fh = IO::File->new($filename, O_RDONLY);
665 if (!$fh) {
666 warn "unable to read '$filename' - $!\n";
667 return {};
668 }
669
670 my $protocols = {};
671
672 while (my $line = <$fh>) {
673 chomp ($line);
674 next if $line =~m/^#/;
675 next if ($line =~m/^\s*$/);
676
677 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
678 $protocols->{byid}->{$2}->{name} = $1;
679 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
680 }
681 }
682
683 close($fh);
684
685 $etc_protocols = $protocols;
686
687 return $etc_protocols;
688}
689
ecbea048
DM		 690sub parse_address_list {
691 my ($str) = @_;
692
28311400 693 return if $str =~ m/^(\+)(\S+)$/; # ipset ref
44be8ceb 694 return if $str =~ m/^${ip_alias_pattern}$/;
d72beb8e 695
3162af6b
DM		 696 my $count = 0;
697 my $iprange = 0;
698 foreach my $elem (split(/,/, $str)) {
699 $count++;
700 if (!Net::IP->new($elem)) {
ecbea048
DM		 701 my $err = Net::IP::Error();
702 die "invalid IP address: $err\n";
703 }
3162af6b 704 $iprange = 1 if $elem =~ m/-/;
ecbea048 705 }
e34d0e58 706
3162af6b 707 die "you can use a range in a list\n" if $iprange && $count > 1;
ecbea048 708}
dddd9413 709
fcba0beb
DM		 710sub parse_port_name_number_or_range {
711 my ($str) = @_;
712
713 my $services = PVE::Firewall::get_etc_services();
7ca36671 714 my $count = 0;
041b7e8e
DM		 715 my $icmp_port = 0;
716
fcba0beb 717 foreach my $item (split(/,/, $str)) {
7ca36671
DM		 718 $count++;
719 if ($item =~ m/^(\d+):(\d+)$/) {
720 my ($port1, $port2) = ($1, $2);
721 die "invalid port '$port1'\n" if $port1 > 65535;
722 die "invalid port '$port2'\n" if $port2 > 65535;
723 } elsif ($item =~ m/^(\d+)$/) {
724 my $port = $1;
725 die "invalid port '$port'\n" if $port > 65535;
726 } else {
041b7e8e
DM		 727 if ($icmp_type_names->{$item}) {
728 $icmp_port = 1;
729 } else {
e34d0e58 730 die "invalid port '$item'\n" if !$services->{byname}->{$item};
041b7e8e 731 }
fcba0beb
DM		 732 }
733 }
734
041b7e8e
DM		 735 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
736
7ca36671 737 return $count;
fcba0beb
DM		 738}
739
54cd19a8
DM		 740PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
741sub pve_fw_verify_port_spec {
742 my ($portstr) = @_;
743
7ca36671 744 parse_port_name_number_or_range($portstr);
54cd19a8
DM		 745
746 return $portstr;
747}
748
749PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
750sub pve_fw_verify_v4addr_spec {
751 my ($list) = @_;
752
753 parse_address_list($list);
754
755 return $list;
756}
757
758PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
759sub pve_fw_verify_protocol_spec {
760 my ($proto) = @_;
761
762 my $protocols = get_etc_protocols();
763
764 die "unknown protocol '$proto'\n" if $proto &&
765 !(defined($protocols->{byname}->{$proto}) ||
766 defined($protocols->{byid}->{$proto}));
767
768 return $proto;
769}
770
771
d1c53b3e 772# helper function for API
d1c53b3e 773
5d38d64f
DM		 774sub copy_opject_with_digest {
775 my ($object) = @_;
776
777 my $sha = Digest::SHA->new('sha1');
778
779 my $res = {};
780 foreach my $k (sort keys %$object) {
781 my $v = $object->{$k};
0365eb68 782 next if !defined($v);
5d38d64f
DM		 783 $res->{$k} = $v;
784 $sha->add($k, ':', $v, "\n");
785 }
786
55e686c7 787 my $digest = $sha->hexdigest;
5d38d64f
DM		 788
789 $res->{digest} = $digest;
790
791 return wantarray ? ($res, $digest) : $res;
792}
793
794sub copy_list_with_digest {
795 my ($list) = @_;
796
797 my $sha = Digest::SHA->new('sha1');
798
799 my $res = [];
800 foreach my $entry (@$list) {
801 my $data = {};
802 foreach my $k (sort keys %$entry) {
803 my $v = $entry->{$k};
0365eb68 804 next if !defined($v);
5d38d64f
DM		 805 $data->{$k} = $v;
806 $sha->add($k, ':', $v, "\n");
807 }
808 push @$res, $data;
809 }
810
55e686c7 811 my $digest = $sha->hexdigest;
5d38d64f
DM		 812
813 foreach my $entry (@$res) {
814 $entry->{digest} = $digest;
815 }
816
817 return wantarray ? ($res, $digest) : $res;
818}
819
9c7e0858
DM		 820my $rule_properties = {
821 pos => {
822 description => "Update rule at position <pos>.",
823 type => 'integer',
824 minimum => 0,
825 optional => 1,
826 },
c71e785f 827 digest => get_standard_option('pve-config-digest'),
9c7e0858
DM		 828 type => {
829 type => 'string',
830 optional => 1,
831 enum => ['in', 'out', 'group'],
832 },
833 action => {
c14dacdf 834 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
9c7e0858
DM		 835 type => 'string',
836 optional => 1,
44be8ceb 837 pattern => $security_group_name_pattern,
c14dacdf
DM		 838 maxLength => 20,
839 minLength => 2,
9c7e0858 840 },
e5076eee
DM		 841 macro => {
842 type => 'string',
843 optional => 1,
54cd19a8 844 maxLength => 128,
e5076eee 845 },
54cd19a8 846 iface => get_standard_option('pve-iface', { optional => 1 }),
9c7e0858 847 source => {
54cd19a8 848 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 849 optional => 1,
850 },
851 dest => {
54cd19a8 852 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 853 optional => 1,
854 },
855 proto => {
54cd19a8 856 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 857 optional => 1,
858 },
859 enable => {
860 type => 'boolean',
861 optional => 1,
862 },
863 sport => {
54cd19a8 864 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 865 optional => 1,
866 },
867 dport => {
54cd19a8 868 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 869 optional => 1,
870 },
871 comment => {
872 type => 'string',
873 optional => 1,
874 },
875};
876
877sub add_rule_properties {
878 my ($properties) = @_;
879
880 foreach my $k (keys %$rule_properties) {
3655b01f
DM		 881 my $h = $rule_properties->{$k};
882 # copy data, so that we can modify later without side effects
883 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 884 }
cbb5d6f3 885
9c7e0858
DM		 886 return $properties;
887}
888
5b7974df
DM		 889sub delete_rule_properties {
890 my ($rule, $delete_str) = @_;
e34d0e58 891
5b7974df
DM		 892 foreach my $opt (PVE::Tools::split_list($delete_str)) {
893 raise_param_exc({ 'delete' => "no such property ('$opt')"})
894 if !defined($rule_properties->{$opt});
895 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
896 if $opt eq 'type' || $opt eq 'action';
897 delete $rule->{$opt};
898 }
899
900 return $rule;
901}
902
9a2745a0
DM		 903my $apply_macro = sub {
904 my ($macro_name, $param, $verify) = @_;
905
906 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
907 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
908
909 my $rules = [];
910
911 foreach my $templ (@$macro_rules) {
912 my $rule = {};
913 my $param_used = {};
914 foreach my $k (keys %$templ) {
915 my $v = $templ->{$k};
916 if ($v eq 'PARAM') {
917 $v = $param->{$k};
918 $param_used->{$k} = 1;
919 } elsif ($v eq 'DEST') {
920 $v = $param->{dest};
921 $param_used->{dest} = 1;
922 } elsif ($v eq 'SOURCE') {
923 $v = $param->{source};
924 $param_used->{source} = 1;
925 }
926
927 if (!defined($v)) {
928 my $msg = "missing parameter '$k' in macro '$macro_name'";
e34d0e58 929 raise_param_exc({ macro => $msg }) if $verify;
9a2745a0
DM		 930 die "$msg\n";
931 }
932 $rule->{$k} = $v;
933 }
934 foreach my $k (keys %$param) {
935 next if $k eq 'macro';
936 next if !defined($param->{$k});
937 next if $param_used->{$k};
938 if (defined($rule->{$k})) {
939 if ($rule->{$k} ne $param->{$k}) {
940 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
e34d0e58 941 raise_param_exc({ $k => $msg }) if $verify;
9a2745a0
DM		 942 die "$msg\n";
943 }
944 } else {
945 $rule->{$k} = $param->{$k};
946 }
947 }
948 push @$rules, $rule;
949 }
950
951 return $rules;
952};
953
7ca36671
DM		 954sub verify_rule {
955 my ($rule, $allow_groups) = @_;
956
957 my $type = $rule->{type};
958
959 raise_param_exc({ type => "missing property"}) if !$type;
960 raise_param_exc({ action => "missing property"}) if !$rule->{action};
e34d0e58 961
7ca36671
DM		 962 if ($type eq 'in' || $type eq 'out') {
963 raise_param_exc({ action => "unknown action '$rule->{action}'"})
964 if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
965 } elsif ($type eq 'group') {
e34d0e58 966 raise_param_exc({ type => "security groups not allowed"})
7ca36671 967 if !$allow_groups;
e34d0e58 968 raise_param_exc({ action => "invalid characters in security group name"})
44be8ceb 969 if $rule->{action} !~ m/^${security_group_name_pattern}$/;
7ca36671
DM		 970 } else {
971 raise_param_exc({ type => "unknown rule type '$type'"});
972 }
e34d0e58 973
dba740a9
DM		 974 if ($rule->{iface}) {
975 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
976 raise_param_exc({ iface => $@ }) if $@;
977 }
7ca36671
DM		 978
979 if ($rule->{macro}) {
980 my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
981 raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
982 $rule->{macro} = $preferred_name;
983 }
984
985 if ($rule->{dport}) {
986 eval { parse_port_name_number_or_range($rule->{dport}); };
987 raise_param_exc({ dport => $@ }) if $@;
988 }
989
990 if ($rule->{sport}) {
991 eval { parse_port_name_number_or_range($rule->{sport}); };
992 raise_param_exc({ sport => $@ }) if $@;
993 }
994
995 if ($rule->{source}) {
996 eval { parse_address_list($rule->{source}); };
997 raise_param_exc({ source => $@ }) if $@;
998 }
999
1000 if ($rule->{dest}) {
1001 eval { parse_address_list($rule->{dest}); };
1002 raise_param_exc({ dest => $@ }) if $@;
1003 }
1004
9a2745a0
DM		 1005 if ($rule->{macro}) {
1006 &$apply_macro($rule->{macro}, $rule, 1);
1007 }
1008
7ca36671
DM		 1009 return $rule;
1010}
1011
9c7e0858
DM		 1012sub copy_rule_data {
1013 my ($rule, $param) = @_;
1014
1015 foreach my $k (keys %$rule_properties) {
1016 if (defined(my $v = $param->{$k})) {
1017 if ($v eq '' || $v eq '-') {
1018 delete $rule->{$k};
1019 } else {
1020 $rule->{$k} = $v;
1021 }
1022 } else {
1023 delete $rule->{$k};
1024 }
1025 }
7ca36671
DM		 1026
1027 # verify rule now
1028
9c7e0858
DM		 1029 return $rule;
1030}
1031
1032# core functions
780bcc0f
DM		 1033my $bridge_firewall_enabled = 0;
1034
1035sub enable_bridge_firewall {
1036
1037 return if $bridge_firewall_enabled; # only once
1038
5f0a912c
DM		 1039 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1040 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1041
6a8a75db
DM		 1042 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1043 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1044
780bcc0f
DM		 1045 $bridge_firewall_enabled = 1;
1046}
1047
8cebfa6f 1048my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 1049
b16e818e
DM		 1050sub iptables_restore_cmdlist {
1051 my ($cmdlist) = @_;
3a616aa0 1052
3fa83edf 1053 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 1054}
1055
34cdedfa
AD		 1056sub ipset_restore_cmdlist {
1057 my ($cmdlist) = @_;
1058
dd7a13fd 1059 run_command("/usr/sbin/ipset restore", input => $cmdlist);
34cdedfa
AD		 1060}
1061
de2a57cd
DM		 1062sub iptables_get_chains {
1063
1064 my $res = {};
1065
1066 # check what chains we want to track
1067 my $is_pvefw_chain = sub {
1068 my $name = shift;
1069
dec84fcd
DM		 1070 return 1 if $name =~ m/^PVEFW-\S+$/;
1071
de2a57cd 1072 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 1073
1074 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1075
9e15114a
DM		 1076 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1077
a01c32c7 1078 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
f50656c2 1079 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 1080
1081 return undef;
1082 };
1083
1084 my $table = '';
1085
c4a2e5ae
DM		 1086 my $hooks = {};
1087
de2a57cd
DM		 1088 my $parser = sub {
1089 my $line = shift;
1090
1091 return if $line =~ m/^#/;
1092 return if $line =~ m/^\s*$/;
1093
1094 if ($line =~ m/^\*(\S+)$/) {
1095 $table = $1;
1096 return;
1097 }
1098
1099 return if $table ne 'filter';
1100
1101 if ($line =~ m/^:(\S+)\s/) {
1102 my $chain = $1;
1103 return if !&$is_pvefw_chain($chain);
3fa83edf 1104 $res->{$chain} = "unknown";
09d5f68e 1105 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1106 my ($chain, $sig) = ($1, $2);
de2a57cd 1107 return if !&$is_pvefw_chain($chain);
3fa83edf 1108 $res->{$chain} = $sig;
c4a2e5ae
DM		 1109 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1110 $hooks->{$1} = 1;
de2a57cd
DM		 1111 } else {
1112 # simply ignore the rest
1113 return;
1114 }
1115 };
1116
1117 run_command("/sbin/iptables-save", outfunc => $parser);
1118
c4a2e5ae 1119 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 1120}
1121
9bf7d929
DM		 1122sub iptables_chain_digest {
1123 my ($rules) = @_;
1124 my $digest = Digest::SHA->new('sha1');
1125 foreach my $rule (@$rules) { # order is important
1126 $digest->add($rule);
1127 }
1128 return $digest->b64digest;
1129}
1130
3f95d14a
DM		 1131sub ipset_chain_digest {
1132 my ($rules) = @_;
4bd0a9c4 1133
3f95d14a
DM		 1134 my $digest = Digest::SHA->new('sha1');
1135 foreach my $rule (sort @$rules) { # note: sorted
1136 $digest->add($rule);
1137 }
1138 return $digest->b64digest;
1139}
1140
34cdedfa
AD		 1141sub ipset_get_chains {
1142
1143 my $res = {};
1144 my $chains = {};
1145
1146 my $parser = sub {
1147 my $line = shift;
1148
1149 return if $line =~ m/^#/;
1150 return if $line =~ m/^\s*$/;
4b96e877 1151 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
DM		 1152 my $chain = $1;
1153 $line =~ s/\s+$//; # delete trailing white space
1154 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 1155 } else {
1156 # simply ignore the rest
1157 return;
1158 }
1159 };
1160
3f95d14a 1161 run_command("/usr/sbin/ipset save", outfunc => $parser);
34cdedfa 1162
3f95d14a
DM		 1163 # compute digest for each chain
1164 foreach my $chain (keys %$chains) {
1165 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 1166 }
1167
1168 return $res;
1169}
1170
eba0fb64 1171sub ruleset_generate_cmdstr {
ba791b1f 1172 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
3a616aa0 1173
00bb4391 1174 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 1175
e5076eee
DM		 1176 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1177
1178 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1179 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
e5076eee 1180
41524a58 1181 my @cmd = ();
3a616aa0 1182
eba0fb64
DM		 1183 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1184 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1185
ba791b1f
AD		 1186 my $source = $rule->{source};
1187 my $dest = $rule->{dest};
1188
cbb5d6f3 1189 if ($source) {
44be8ceb
DM		 1190 if ($source =~ m/^\+/) {
1191 if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1192 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1193 push @cmd, "-m set --match-set PVEFW-$1 src";
1194 } else {
1195 die "invalid security group name '$source'\n";
1196 }
1197 } elsif ($source =~ m/^${ip_alias_pattern}$/){
81d574a7
DM		 1198 my $alias = lc($source);
1199 my $e = $cluster_conf->{aliases}->{$alias};
1200 die "no such alias $source\n" if !$e;
1201 push @cmd, "-s $e->{cidr}";
ac8242cc 1202 } elsif ($source =~ m/\-/){
ba791b1f
AD		 1203 push @cmd, "-m iprange --src-range $source";
1204
cbb5d6f3 1205 } else {
ba791b1f
AD		 1206 push @cmd, "-s $source";
1207 }
1208 }
1209
cbb5d6f3 1210 if ($dest) {
44be8ceb
DM		 1211 if ($dest =~ m/^\+/) {
1212 if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1213 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1214 push @cmd, "-m set --match-set PVEFW-$1 dst";
1215 } else {
1216 die "invalid security group name '$dest'\n";
1217 }
1218 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
51b40846 1219 my $alias = lc($dest);
81d574a7
DM		 1220 my $e = $cluster_conf->{aliases}->{$alias};
1221 die "no such alias $dest" if !$e;
1222 push @cmd, "-d $e->{cidr}";
cbb5d6f3 1223 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
ba791b1f
AD		 1224 push @cmd, "-m iprange --dst-range $dest";
1225
cbb5d6f3 1226 } else {
d6d2a385 1227 push @cmd, "-d $dest";
ba791b1f
AD		 1228 }
1229 }
4b586518 1230
181390b0 1231 if ($rule->{proto}) {
41524a58 1232 push @cmd, "-p $rule->{proto}";
e3a1d391 1233
181390b0 1234 my $multiport = 0;
e5076eee
DM		 1235 $multiport++ if $nbdport > 1;
1236 $multiport++ if $nbsport > 1;
e3a1d391 1237
41524a58 1238 push @cmd, "--match multiport" if $multiport;
4b586518 1239
cbb5d6f3 1240 die "multiport: option '--sports' cannot be used together with '--dports'\n"
181390b0
DM		 1241 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1242
1243 if ($rule->{dport}) {
1244 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1245 # Note: we use dport to store --icmp-type
1246 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 1247 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0 1248 } else {
e5076eee 1249 if ($nbdport > 1) {
181390b0 1250 if ($multiport == 2) {
41524a58 1251 push @cmd, "--ports $rule->{dport}";
181390b0 1252 } else {
41524a58 1253 push @cmd, "--dports $rule->{dport}";
181390b0 1254 }
e3a1d391 1255 } else {
41524a58 1256 push @cmd, "--dport $rule->{dport}";
e3a1d391 1257 }
4b586518
DM		 1258 }
1259 }
4b586518 1260
181390b0 1261 if ($rule->{sport}) {
e5076eee 1262 if ($nbsport > 1) {
41524a58 1263 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 1264 } else {
41524a58 1265 push @cmd, "--sport $rule->{sport}";
181390b0 1266 }
4b586518 1267 }
181390b0
DM		 1268 } elsif ($rule->{dport} || $rule->{sport}) {
1269 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1270 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 1271 }
1272
41524a58 1273 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 1274
1275 if (my $action = $rule->{action}) {
cbb5d6f3 1276 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 1277 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 1278 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 1279 }
3a616aa0 1280
eba0fb64
DM		 1281 return scalar(@cmd) ? join(' ', @cmd) : undef;
1282}
1283
1284sub ruleset_generate_rule {
ba791b1f 1285 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
eba0fb64 1286
e5076eee
DM		 1287 my $rules;
1288
1289 if ($rule->{macro}) {
1290 $rules = &$apply_macro($rule->{macro}, $rule);
1291 } else {
1292 $rules = [ $rule ];
1293 }
1294
d4091b82
DM		 1295 # update all or nothing
1296
1297 my @cmds = ();
cbb5d6f3 1298 foreach my $tmp (@$rules) {
ba791b1f 1299 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
d4091b82 1300 push @cmds, $cmdstr;
e5076eee 1301 }
41524a58 1302 }
d4091b82
DM		 1303
1304 foreach my $cmdstr (@cmds) {
1305 ruleset_addrule($ruleset, $chain, $cmdstr);
1306 }
3fa83edf 1307}
0f168d7b 1308
eba0fb64
DM		 1309sub ruleset_generate_rule_insert {
1310 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1311
e5076eee
DM		 1312 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1313
eba0fb64
DM		 1314 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1315 ruleset_insertrule($ruleset, $chain, $cmdstr);
1316 }
1317}
3fa83edf
DM		 1318
1319sub ruleset_create_chain {
1320 my ($ruleset, $chain) = @_;
3a616aa0 1321
d050c724 1322 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1323 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1324
3fa83edf
DM		 1325 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1326
1327 $ruleset->{$chain} = [];
3a616aa0
AD		 1328}
1329
3fa83edf
DM		 1330sub ruleset_chain_exist {
1331 my ($ruleset, $chain) = @_;
3a616aa0 1332
3fa83edf
DM		 1333 return $ruleset->{$chain} ? 1 : undef;
1334}
3a616aa0 1335
3fa83edf
DM		 1336sub ruleset_addrule {
1337 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1338
3fa83edf 1339 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1340
3fa83edf
DM		 1341 push @{$ruleset->{$chain}}, "-A $chain $rule";
1342}
3a616aa0 1343
3fa83edf
DM		 1344sub ruleset_insertrule {
1345 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1346
3fa83edf 1347 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1348
3fa83edf
DM		 1349 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1350}
3a616aa0 1351
782c4cde
DM		 1352sub get_log_rule_base {
1353 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 1354
782c4cde
DM		 1355 die "internal error - no log level" if !defined($loglevel);
1356
1357 $vmid = 0 if !defined($vmid);
1358
cbb5d6f3 1359 # Note: we use special format for prefix to pass further
782c4cde
DM		 1360 # info to log daemon (VMID, LOGVELEL and CHAIN)
1361
1362 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1363}
1364
1365sub ruleset_addlog {
1366 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1367
1368 return if !defined($loglevel);
1369
1370 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1371
1372 $logrule = "$rule $logrule" if defined($rule);
1373
88733a74 1374 ruleset_addrule($ruleset, $chain, $logrule);
782c4cde
DM		 1375}
1376
ead850e8 1377sub ruleset_add_chain_policy {
782c4cde 1378 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 1379
1380 if ($policy eq 'ACCEPT') {
1381
1382 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1383 { ACCEPT => $accept_action});
1384
1385 } elsif ($policy eq 'DROP') {
1386
1387 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1388
782c4cde 1389 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1390
1391 ruleset_addrule($ruleset, $chain, "-j DROP");
1392 } elsif ($policy eq 'REJECT') {
1393 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1394
782c4cde 1395 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1396
1397 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1398 } else {
1399 # should not happen
1400 die "internal error: unknown policy '$policy'";
1401 }
1402}
1403
e2943485
DM		 1404sub ruleset_chain_add_conn_filters {
1405 my ($ruleset, $chain, $accept) = @_;
1406
1407 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1408 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1409}
1410
1411sub ruleset_chain_add_input_filters {
2428e394
AD		 1412 my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1413
1414 if ($cluster_conf->{ipset}->{blacklist}){
1415 ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1416 ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1417 }
e2943485
DM		 1418
1419 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1420 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1421 }
1422
1423 if ($options->{tcpflags}) {
1424 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1425 }
1426}
1427
9e15114a 1428sub ruleset_create_vm_chain {
6bafd113 1429 my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
3a616aa0 1430
9e15114a 1431 ruleset_create_chain($ruleset, $chain);
b47ecc88 1432 my $accept = generate_nfqueue($options);
3a616aa0 1433
ce15d90b 1434 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 1435 if ($direction eq 'OUT') {
cbb5d6f3 1436 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
0f168d7b 1437 proto => 'udp', sport => 68, dport => 67 });
76a2d1e7 1438 } else {
cbb5d6f3 1439 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
0f168d7b 1440 proto => 'udp', sport => 67, dport => 68 });
76a2d1e7 1441 }
ce15d90b
DM		 1442 }
1443
b21aca2c
DM		 1444 if ($direction eq 'OUT') {
1445 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 1446 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 1447 }
9e15114a 1448 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 1449 }
9e15114a
DM		 1450}
1451
4bc6b5ac
DM		 1452sub ruleset_add_group_rule {
1453 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1454
1455 my $group = $rule->{action};
1456 my $group_chain = "GROUP-$group-$direction";
1457 if(!ruleset_chain_exist($ruleset, $group_chain)){
1458 generate_group_rules($ruleset, $cluster_conf, $group);
1459 }
f8b12fff
DM		 1460
1461 if ($direction eq 'OUT' && $rule->{iface_out}) {
1462 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1463 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1464 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
4bc6b5ac
DM		 1465 } else {
1466 ruleset_addrule($ruleset, $chain, "-j $group_chain");
1467 }
1468
1469 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1470}
1471
9e15114a 1472sub ruleset_generate_vm_rules {
fca39c2c 1473 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
9e15114a
DM		 1474
1475 my $lc_direction = lc($direction);
c29f55c9 1476
6b8ca015
DM		 1477 my $in_accept = generate_nfqueue($options);
1478
92e976b3
DM		 1479 foreach my $rule (@$rules) {
1480 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1481 next if !$rule->{enable};
92e976b3 1482 if ($rule->{type} eq 'group') {
4bc6b5ac
DM		 1483 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1484 $direction eq 'OUT' ? 'RETURN' : $in_accept);
92e976b3
DM		 1485 } else {
1486 next if $rule->{type} ne $lc_direction;
921dfb33
DM		 1487 eval {
1488 if ($direction eq 'OUT') {
1489 ruleset_generate_rule($ruleset, $chain, $rule,
e34d0e58 1490 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
921dfb33
DM		 1491 undef, $cluster_conf);
1492 } else {
e34d0e58
DM		 1493 ruleset_generate_rule($ruleset, $chain, $rule,
1494 { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
921dfb33
DM		 1495 undef, $cluster_conf);
1496 }
1497 };
1498 warn $@ if $@;
4e6112f9 1499 }
3a616aa0 1500 }
9e15114a
DM		 1501}
1502
b47ecc88
AD		 1503sub generate_nfqueue {
1504 my ($options) = @_;
1505
73089769
DM		 1506 if ($options->{ips}) {
1507 my $action = "NFQUEUE";
1508 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1509 if (defined($3) && defined($1)) {
b47ecc88 1510 $action .= " --queue-balance $1:$3";
73089769 1511 } elsif (defined($1)) {
b47ecc88
AD		 1512 $action .= " --queue-num $1";
1513 }
1514 }
8dc92812 1515 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
73089769
DM		 1516 return $action;
1517 } else {
1518 return "ACCEPT";
b47ecc88 1519 }
b47ecc88
AD		 1520}
1521
da6fc60b 1522sub ruleset_generate_vm_ipsrules {
a01c32c7 1523 my ($ruleset, $options, $direction, $iface) = @_;
da6fc60b
AD		 1524
1525 if ($options->{ips} && $direction eq 'IN') {
1526 my $nfqueue = generate_nfqueue($options);
1527
a01c32c7 1528 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
da6fc60b
AD		 1529 ruleset_create_chain($ruleset, "PVEFW-IPS");
1530 }
1531
a01c32c7 1532 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
da6fc60b
AD		 1533 }
1534}
1535
9e15114a 1536sub generate_venet_rules_direction {
6bafd113 1537 my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
9e15114a 1538
9e15114a
DM		 1539 my $lc_direction = lc($direction);
1540
1541 my $rules = $vmfw_conf->{rules};
1542
1543 my $options = $vmfw_conf->{options};
6bafd113 1544 my $hostfw_options = $vmfw_conf->{options};
9e15114a
DM		 1545 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1546
1547 my $chain = "venet0-$vmid-$direction";
1548
6bafd113 1549 ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
9e15114a 1550
fca39c2c 1551 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
9e15114a
DM		 1552
1553 # implement policy
1554 my $policy;
1555
1556 if ($direction eq 'OUT') {
1557 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1558 } else {
1559 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1560 }
1561
b47ecc88
AD		 1562 my $accept = generate_nfqueue($options);
1563 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1564 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1565
eba0fb64 1566 if ($direction eq 'OUT') {
41389aed 1567 ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
eba0fb64
DM		 1568 action => $chain,
1569 source => $ip,
1570 iface_in => 'venet0'});
1571 } else {
41389aed 1572 ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
eba0fb64
DM		 1573 action => $chain,
1574 dest => $ip,
1575 iface_out => 'venet0'});
1576 }
9e15114a
DM		 1577}
1578
1579sub generate_tap_rules_direction {
a01c32c7 1580 my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
9e15114a
DM		 1581
1582 my $lc_direction = lc($direction);
1583
1584 my $rules = $vmfw_conf->{rules};
1585
1586 my $options = $vmfw_conf->{options};
6bafd113 1587 my $hostfw_options = $hostfw_conf->{options};
9e15114a
DM		 1588 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1589
1590 my $tapchain = "$iface-$direction";
1591
6bafd113 1592 ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
9e15114a 1593
fca39c2c 1594 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
3a616aa0 1595
a01c32c7 1596 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
da6fc60b 1597
ccae0b50
DM		 1598 # implement policy
1599 my $policy;
1600
1601 if ($direction eq 'OUT') {
72f63fde 1602 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1603 } else {
72f63fde 1604 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1605 }
1606
b47ecc88
AD		 1607 my $accept = generate_nfqueue($options);
1608 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1609 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1610
3fa83edf 1611 # plug the tap chain to bridge chain
3cc81077 1612 if ($direction eq 'IN') {
a01c32c7
DM		 1613 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1614 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
3cc81077 1615 } else {
a01c32c7
DM		 1616 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1617 "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
3cc81077 1618 }
3a616aa0
AD		 1619}
1620
d18c1e2b 1621sub enable_host_firewall {
fca39c2c 1622 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
0bd5f137 1623
92e976b3 1624 my $options = $hostfw_conf->{options};
63324b09 1625 my $cluster_options = $cluster_conf->{options};
92e976b3 1626 my $rules = $hostfw_conf->{rules};
35f0c37e 1627 my $cluster_rules = $cluster_conf->{rules};
178a63be 1628
3fa83edf 1629 # host inbound firewall
dec84fcd
DM		 1630 my $chain = "PVEFW-HOST-IN";
1631 ruleset_create_chain($ruleset, $chain);
0bd5f137 1632
178a63be
DM		 1633 my $loglevel = get_option_log_level($options, "log_level_in");
1634
e2943485 1635 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
4ac863a6 1636
e2943485 1637 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2428e394 1638 ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
fb424a00 1639
dec84fcd 1640 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1641 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1642 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1643
23e888f8
DM		 1644 # we use RETURN because we need to check also tap rules
1645 my $accept_action = 'RETURN';
1646
35f0c37e
DM		 1647 # add host rules first, so that cluster wide rules can be overwritten
1648 foreach my $rule (@$rules, @$cluster_rules) {
f8b12fff 1649 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
4bc6b5ac
DM		 1650 if ($rule->{type} eq 'group') {
1651 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1652 } elsif ($rule->{type} eq 'in') {
4bc6b5ac
DM		 1653 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1654 undef, $cluster_conf);
4bc6b5ac 1655 }
f8b12fff 1656 delete $rule->{iface_in};
0bd5f137
AD		 1657 }
1658
23e888f8 1659 # implement input policy
63324b09 1660 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1661 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1662
3fa83edf 1663 # host outbound firewall
aadd745e 1664 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1665 ruleset_create_chain($ruleset, $chain);
1666
178a63be
DM		 1667 $loglevel = get_option_log_level($options, "log_level_out");
1668
dec84fcd 1669 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
e2943485
DM		 1670
1671 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1672
dec84fcd 1673 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1674 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1675 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1676
23e888f8
DM		 1677 # we use RETURN because we may want to check other thigs later
1678 $accept_action = 'RETURN';
1679
35f0c37e
DM		 1680 # add host rules first, so that cluster wide rules can be overwritten
1681 foreach my $rule (@$rules, @$cluster_rules) {
f8b12fff 1682 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
4bc6b5ac
DM		 1683 if ($rule->{type} eq 'group') {
1684 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1685 } elsif ($rule->{type} eq 'out') {
4bc6b5ac
DM		 1686 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1687 undef, $cluster_conf);
4bc6b5ac 1688 }
f8b12fff 1689 delete $rule->{iface_out};
0bd5f137
AD		 1690 }
1691
23e888f8 1692 # implement output policy
63324b09 1693 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1694 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1695
dec84fcd
DM		 1696 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1697 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1698}
1699
1700sub generate_group_rules {
fca39c2c 1701 my ($ruleset, $cluster_conf, $group) = @_;
9d31b418 1702
c6f5cc88 1703 my $rules = $cluster_conf->{groups}->{$group};
6158271d 1704
b4deedab
DM		 1705 if (!$rules) {
1706 warn "no such security group '$group'\n";
1707 $rules = []; # create empty chain
1708 }
1709
3fa83edf 1710 my $chain = "GROUP-${group}-IN";
9d31b418 1711
3fa83edf 1712 ruleset_create_chain($ruleset, $chain);
b47ecc88 1713 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1714
92e976b3
DM		 1715 foreach my $rule (@$rules) {
1716 next if $rule->{type} ne 'in';
ba791b1f 1717 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418
AD		 1718 }
1719
3fa83edf 1720 $chain = "GROUP-${group}-OUT";
9d31b418 1721
3fa83edf 1722 ruleset_create_chain($ruleset, $chain);
4e6112f9 1723 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1724
92e976b3
DM		 1725 foreach my $rule (@$rules) {
1726 next if $rule->{type} ne 'out';
1727 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1728 # check also other tap rules later
cbb5d6f3 1729 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1730 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418 1731 }
9d31b418
AD		 1732}
1733
51bae274
DM		 1734my $MAX_NETS = 32;
1735my $valid_netdev_names = {};
1736for (my $i = 0; $i < $MAX_NETS; $i++) {
1737 $valid_netdev_names->{"net$i"} = 1;
1738}
5e1267a5 1739
51bae274 1740sub parse_fw_rule {
dba740a9 1741 my ($line, $allow_iface, $allow_groups) = @_;
5e1267a5 1742
dba740a9
DM		 1743 my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1744
1745 chomp $line;
51bae274 1746
11bac5c2 1747 # we can add single line comments to the end of the rule
30c1ae52 1748 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM		 1749
1750 # we can disable a rule when prefixed with '|'
ea9e5116
DM		 1751 my $enable = 1;
1752
1753 $enable = 0 if $line =~ s/^\|//;
51bae274 1754
dba740a9
DM		 1755 $line =~ s/^(\S+)\s+(\S+)\s*// ||
1756 die "unable to parse rule: $line\n";
1757
1758 $type = lc($1);
1759 $action = $2;
92e976b3
DM		 1760
1761 if ($type eq 'in' || $type eq 'out') {
1762 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1763 # OK
1764 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
e5076eee
DM		 1765 $action = $2;
1766 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1767 die "unknown macro '$1'\n" if !$preferred_name;
1768 $macro = $preferred_name;
92e976b3
DM		 1769 } else {
1770 die "unknown action '$action'\n";
1771 }
1772 } elsif ($type eq 'group') {
92e976b3 1773 die "groups disabled\n" if !$allow_groups;
44be8ceb 1774 die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
51bae274 1775 } else {
92e976b3 1776 die "unknown rule type '$type'\n";
51bae274
DM		 1777 }
1778
dba740a9
DM		 1779 while (length($line)) {
1780 if ($line =~ s/^-i (\S+)\s*//) {
1781 die "parameter -i not allowed\n" if !$allow_iface;
1782 $iface = $1;
1783 PVE::JSONSchema::pve_verify_iface($iface);
1784 next;
1785 }
51bae274 1786
dba740a9 1787 last if $type eq 'group';
51bae274 1788
dba740a9
DM		 1789 if ($line =~ s/^-p (\S+)\s*//) {
1790 $proto = $1;
1791 pve_fw_verify_protocol_spec($proto);
1792 next;
1793 }
1794 if ($line =~ s/^-dport (\S+)\s*//) {
1795 $dport = $1;
1796 parse_port_name_number_or_range($dport);
1797 next;
1798 }
1799 if ($line =~ s/^-sport (\S+)\s*//) {
1800 $sport = $1;
1801 parse_port_name_number_or_range($sport);
1802 next;
1803 }
1804 if ($line =~ s/^-source (\S+)\s*//) {
1805 $source = $1;
1806 parse_address_list($source);
1807 next;
1808 }
1809 if ($line =~ s/^-dest (\S+)\s*//) {
1810 $dest = $1;
1811 parse_address_list($dest);
1812 next;
1813 }
51bae274 1814
dba740a9
DM		 1815 last;
1816 }
ba791b1f 1817
dba740a9 1818 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 1819
e5076eee 1820 return {
92e976b3 1821 type => $type,
ea9e5116 1822 enable => $enable,
11bac5c2 1823 comment => $comment,
51bae274 1824 action => $action,
e5076eee 1825 macro => $macro,
51bae274
DM		 1826 iface => $iface,
1827 source => $source,
1828 dest => $dest,
51bae274
DM		 1829 proto => $proto,
1830 dport => $dport,
1831 sport => $sport,
51bae274
DM		 1832 };
1833}
1834
2d404ffc 1835sub parse_vmfw_option {
85c6eaed
DM		 1836 my ($line) = @_;
1837
1838 my ($opt, $value);
1839
178a63be
DM		 1840 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1841
6bafd113 1842 if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1843 $opt = lc($1);
1844 $value = int($2);
178a63be
DM		 1845 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1846 $opt = lc($1);
1847 $value = $2 ? lc($3) : '';
72f63fde 1848 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1849 $opt = lc($1);
1850 $value = uc($3);
b47ecc88
AD		 1851 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1852 $opt = lc($1);
1853 $value = $2;
9c6b6efd 1854 } else {
85c6eaed
DM		 1855 chomp $line;
1856 die "can't parse option '$line'\n"
1857 }
1858
1859 return ($opt, $value);
1860}
1861
2d404ffc
DM		 1862sub parse_hostfw_option {
1863 my ($line) = @_;
1864
1865 my ($opt, $value);
1866
1867 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1868
c50a5a68 1869 if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1870 $opt = lc($1);
1871 $value = int($2);
178a63be 1872 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1873 $opt = lc($1);
1874 $value = $2 ? lc($3) : '';
28c082a1 1875 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 1876 $opt = lc($1);
1877 $value = int($2);
2d404ffc
DM		 1878 } else {
1879 chomp $line;
1880 die "can't parse option '$line'\n"
1881 }
1882
1883 return ($opt, $value);
1884}
1885
c6f5cc88
DM		 1886sub parse_clusterfw_option {
1887 my ($line) = @_;
1888
1889 my ($opt, $value);
1890
1891 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1892 $opt = lc($1);
1893 $value = int($2);
63324b09
DM		 1894 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1895 $opt = lc($1);
1896 $value = uc($3);
c6f5cc88
DM		 1897 } else {
1898 chomp $line;
1899 die "can't parse option '$line'\n"
1900 }
1901
1902 return ($opt, $value);
1903}
1904
92e1209b
AD		 1905sub parse_clusterfw_alias {
1906 my ($line) = @_;
1907
81d574a7
DM		 1908 # we can add single line comments to the end of the line
1909 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1910
92e1209b 1911 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7
DM		 1912 my ($name, $cidr) = ($1, $2);
1913 $cidr =~ s|/32$||;
1914 pve_verify_ipv4_or_cidr($cidr);
1915 my $data = {
1916 name => $name,
1917 cidr => $cidr,
1918 };
1919 $data->{comment} = $comment if $comment;
1920 return $data;
92e1209b
AD		 1921 }
1922
81d574a7 1923 return undef;
92e1209b
AD		 1924}
1925
51bae274
DM		 1926sub parse_vm_fw_rules {
1927 my ($filename, $fh) = @_;
1928
92e976b3 1929 my $res = { rules => [], options => {}};
51bae274
DM		 1930
1931 my $section;
1932
5e1267a5
DM		 1933 while (defined(my $line = <$fh>)) {
1934 next if $line =~ m/^#/;
1935 next if $line =~ m/^\s*$/;
1936
961b4928
DM		 1937 my $linenr = $fh->input_line_number();
1938 my $prefix = "$filename (line $linenr)";
1939
85c6eaed 1940 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1941 $section = lc($1);
85c6eaed 1942 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1943 next;
1944 }
51bae274 1945 if (!$section) {
961b4928 1946 warn "$prefix: skip line - no section";
5e1267a5
DM		 1947 next;
1948 }
1949
85c6eaed
DM		 1950 next if !$res->{$section}; # skip undefined section
1951
1952 if ($section eq 'options') {
6158271d 1953 eval {
2d404ffc 1954 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1955 $res->{options}->{$opt} = $value;
1956 };
1957 warn "$prefix: $@" if $@;
1958 next;
1959 }
1960
e5076eee
DM		 1961 my $rule;
1962 eval { $rule = parse_fw_rule($line, 1, 1); };
51bae274 1963 if (my $err = $@) {
961b4928 1964 warn "$prefix: $err";
5e1267a5
DM		 1965 next;
1966 }
1967
e5076eee 1968 push @{$res->{$section}}, $rule;
51bae274
DM		 1969 }
1970
1971 return $res;
1972}
1973
1974sub parse_host_fw_rules {
1975 my ($filename, $fh) = @_;
1976
92e976b3 1977 my $res = { rules => [], options => {}};
51bae274
DM		 1978
1979 my $section;
1980
1981 while (defined(my $line = <$fh>)) {
1982 next if $line =~ m/^#/;
1983 next if $line =~ m/^\s*$/;
1984
961b4928
DM		 1985 my $linenr = $fh->input_line_number();
1986 my $prefix = "$filename (line $linenr)";
1987
2d404ffc 1988 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1989 $section = lc($1);
2d404ffc 1990 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1991 next;
1992 }
51bae274 1993 if (!$section) {
961b4928 1994 warn "$prefix: skip line - no section";
5e1267a5
DM		 1995 next;
1996 }
1997
2d404ffc
DM		 1998 next if !$res->{$section}; # skip undefined section
1999
2000 if ($section eq 'options') {
2001 eval {
2d404ffc
DM		 2002 my ($opt, $value) = parse_hostfw_option($line);
2003 $res->{options}->{$opt} = $value;
2004 };
2005 warn "$prefix: $@" if $@;
2006 next;
2007 }
2008
e5076eee
DM		 2009 my $rule;
2010 eval { $rule = parse_fw_rule($line, 1, 1); };
ecbea048 2011 if (my $err = $@) {
961b4928 2012 warn "$prefix: $err";
ecbea048 2013 next;
ecbea048 2014 }
cbb5d6f3 2015
e5076eee 2016 push @{$res->{$section}}, $rule;
51bae274 2017 }
ecbea048 2018
51bae274
DM		 2019 return $res;
2020}
4cdbb3b7 2021
c6f5cc88 2022sub parse_cluster_fw_rules {
51bae274 2023 my ($filename, $fh) = @_;
5e1267a5 2024
51bae274
DM		 2025 my $section;
2026 my $group;
2027
e34d0e58
DM		 2028 my $res = {
2029 rules => [],
2030 options => {},
2031 aliases => {},
2032 groups => {},
2033 group_comments => {},
d72c631c 2034 ipset => {} ,
e34d0e58 2035 ipset_comments => {},
0d22acb3 2036 };
6158271d 2037
51bae274
DM		 2038 while (defined(my $line = <$fh>)) {
2039 next if $line =~ m/^#/;
2040 next if $line =~ m/^\s*$/;
2041
961b4928
DM		 2042 my $linenr = $fh->input_line_number();
2043 my $prefix = "$filename (line $linenr)";
2044
c6f5cc88
DM		 2045 if ($line =~ m/^\[options\]$/i) {
2046 $section = 'options';
2047 next;
2048 }
2049
92e1209b
AD		 2050 if ($line =~ m/^\[aliases\]$/i) {
2051 $section = 'aliases';
2052 next;
2053 }
2054
0d22acb3 2055 if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
c6f5cc88 2056 $section = 'groups';
92e976b3 2057 $group = lc($1);
0d22acb3 2058 my $comment = $2;
c85c87f9 2059 $res->{$section}->{$group} = [];
649e4d57
DM		 2060 $res->{group_comments}->{$group} = decode('utf8', $comment)
2061 if $comment;
51bae274
DM		 2062 next;
2063 }
34cdedfa 2064
c6f5cc88
DM		 2065 if ($line =~ m/^\[rules\]$/i) {
2066 $section = 'rules';
2067 next;
2068 }
cbb5d6f3 2069
d72c631c 2070 if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
34cdedfa
AD		 2071 $section = 'ipset';
2072 $group = lc($1);
d72c631c 2073 my $comment = $2;
c85c87f9 2074 $res->{$section}->{$group} = [];
e34d0e58 2075 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2076 if $comment;
34cdedfa
AD		 2077 next;
2078 }
2079
c6f5cc88 2080 if (!$section) {
cbb5d6f3 2081 warn "$prefix: skip line - no section\n";
51bae274
DM		 2082 next;
2083 }
2084
c6f5cc88
DM		 2085 if ($section eq 'options') {
2086 eval {
2087 my ($opt, $value) = parse_clusterfw_option($line);
2088 $res->{options}->{$opt} = $value;
2089 };
2090 warn "$prefix: $@" if $@;
92e1209b
AD		 2091 } elsif ($section eq 'aliases') {
2092 eval {
81d574a7
DM		 2093 my $data = parse_clusterfw_alias($line);
2094 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2095 };
2096 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2097 } elsif ($section eq 'rules') {
2098 my $rule;
2099 eval { $rule = parse_fw_rule($line, 1, 1); };
2100 if (my $err = $@) {
2101 warn "$prefix: $err";
2102 next;
2103 }
2104 push @{$res->{$section}}, $rule;
2105 } elsif ($section eq 'groups') {
34cdedfa
AD		 2106 my $rule;
2107 eval { $rule = parse_fw_rule($line, 0, 0); };
2108 if (my $err = $@) {
2109 warn "$prefix: $err";
2110 next;
2111 }
3f95d14a 2112 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2113 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2114 # we can add single line comments to the end of the rule
2115 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2116
30f1b100 2117 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2118 my $nomatch = $1;
9d6f90e6 2119 my $cidr = $2;
2a052ee3 2120
44be8ceb 2121 if($cidr !~ m/^${ip_alias_pattern}$/) {
92e1209b 2122 $cidr =~ s|/32$||;
e34d0e58 2123
92e1209b
AD		 2124 eval { pve_verify_ipv4_or_cidr($cidr); };
2125 if (my $err = $@) {
2126 warn "$prefix: $cidr - $err";
2127 next;
2128 }
2a052ee3 2129 }
2a052ee3 2130
e34d0e58 2131 my $entry = { cidr => $cidr };
9d6f90e6
DM		 2132 $entry->{nomatch} = 1 if $nomatch;
2133 $entry->{comment} = $comment if $comment;
e34d0e58 2134
9d6f90e6 2135 push @{$res->{$section}->{$group}}, $entry;
51bae274 2136 }
5e1267a5
DM		 2137 }
2138
2139 return $res;
2140}
2141
06320eb0
DM		 2142sub run_locked {
2143 my ($code, @param) = @_;
2144
2145 my $timeout = 10;
2146
2147 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2148
2149 die $@ if $@;
2150
2151 return $res;
2152}
2153
5e1267a5
DM		 2154sub read_local_vm_config {
2155
2156 my $openvz = {};
5e1267a5
DM		 2157 my $qemu = {};
2158
c8301d63 2159 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 2160
c8301d63
DM		 2161 my $vmlist = PVE::Cluster::get_vmlist();
2162 return $vmdata if !$vmlist || !$vmlist->{ids};
2163 my $ids = $vmlist->{ids};
2164
2165 foreach my $vmid (keys %$ids) {
2166 next if !$vmid; # skip VE0
2167 my $d = $ids->{$vmid};
2168 next if !$d->{node} || $d->{node} ne $nodename;
2169 next if !$d->{type};
2170 if ($d->{type} eq 'openvz') {
d9fee004
DM		 2171 if ($have_pve_manager) {
2172 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2173 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2174 $openvz->{$vmid} = $conf;
2175 }
c8301d63
DM		 2176 }
2177 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM		 2178 if ($have_qemu_server) {
2179 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2180 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2181 $qemu->{$vmid} = $conf;
2182 }
c8301d63 2183 }
5e1267a5
DM		 2184 }
2185 }
d9fee004 2186
5e1267a5
DM		 2187 return $vmdata;
2188};
2189
e7b35711 2190sub load_vmfw_conf {
8aef5177 2191 my ($vmid, $dir) = @_;
e7b35711
DM		 2192
2193 my $vmfw_conf = {};
2194
8aef5177
DM		 2195 $dir = "/etc/pve/firewall" if !defined($dir);
2196
2197 my $filename = "$dir/$vmid.fw";
e7b35711
DM		 2198 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2199 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2200 }
2201
2202 return $vmfw_conf;
2203}
2204
464f933e 2205my $format_rules = sub {
dba740a9 2206 my ($rules, $allow_iface) = @_;
464f933e
DM		 2207
2208 my $raw = '';
2209
2210 foreach my $rule (@$rules) {
c14dacdf 2211 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 2212 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2213 $raw .= uc($rule->{type});
7ca36671
DM		 2214 if ($rule->{macro}) {
2215 $raw .= " $rule->{macro}($rule->{action})";
2216 } else {
2217 $raw .= " " . $rule->{action};
2218 }
dba740a9
DM		 2219 if ($allow_iface && $rule->{iface}) {
2220 $raw .= " -i $rule->{iface}";
2221 }
c14dacdf
DM		 2222
2223 if ($rule->{type} ne 'group') {
dba740a9
DM		 2224 $raw .= " -source $rule->{source}" if $rule->{source};
2225 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2226 $raw .= " -p $rule->{proto}" if $rule->{proto};
2227 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2228 $raw .= " -sport $rule->{sport}" if $rule->{sport};
c14dacdf
DM		 2229 }
2230
cbb5d6f3 2231 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 2232 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2233 $raw .= "\n";
2234 } else {
c14dacdf 2235 die "unknown rule type '$rule->{type}'";
464f933e
DM		 2236 }
2237 }
2238
2239 return $raw;
2240};
2241
2242my $format_options = sub {
68c90e21
DM		 2243 my ($options) = @_;
2244
2245 my $raw = '';
464f933e
DM		 2246
2247 $raw .= "[OPTIONS]\n\n";
2248 foreach my $opt (keys %$options) {
2249 $raw .= "$opt: $options->{$opt}\n";
2250 }
2251 $raw .= "\n";
68c90e21
DM		 2252
2253 return $raw;
464f933e
DM		 2254};
2255
0d5f0a0f
DM		 2256my $format_aliases = sub {
2257 my ($aliases) = @_;
2258
2259 my $raw = '';
2260
2261 $raw .= "[ALIASES]\n\n";
2262 foreach my $k (keys %$aliases) {
81d574a7
DM		 2263 my $e = $aliases->{$k};
2264 $raw .= "$e->{name} $e->{cidr}";
2265 $raw .= " # " . encode('utf8', $e->{comment})
2266 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2267 $raw .= "\n";
0d5f0a0f
DM		 2268 }
2269 $raw .= "\n";
2270
2271 return $raw;
2272};
2273
9d6f90e6
DM		 2274my $format_ipset = sub {
2275 my ($options) = @_;
2276
2277 my $raw = '';
2278
6e299ae3 2279 my $nethash = {};
9d6f90e6 2280 foreach my $entry (@$options) {
6e299ae3
DM		 2281 $nethash->{$entry->{cidr}} = $entry;
2282 }
2283
2284 foreach my $cidr (sort keys %$nethash) {
2285 my $entry = $nethash->{$cidr};
9d6f90e6
DM		 2286 my $line = $entry->{nomatch} ? '!' : '';
2287 $line .= $entry->{cidr};
2288 $line .= " # " . encode('utf8', $entry->{comment})
2289 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2290 $raw .= "$line\n";
2291 }
e34d0e58 2292
9d6f90e6
DM		 2293 return $raw;
2294};
2295
464f933e
DM		 2296sub save_vmfw_conf {
2297 my ($vmid, $vmfw_conf) = @_;
2298
2299 my $raw = '';
2300
2301 my $options = $vmfw_conf->{options};
68c90e21 2302 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2303
8824b2f0 2304 my $rules = $vmfw_conf->{rules} || [];
464f933e
DM		 2305 if (scalar(@$rules)) {
2306 $raw .= "[RULES]\n\n";
2307 $raw .= &$format_rules($rules, 1);
2308 $raw .= "\n";
2309 }
2310
2311 my $filename = "/etc/pve/firewall/$vmid.fw";
2312 PVE::Tools::file_set_contents($filename, $raw);
2313}
2314
6fc63ffd 2315sub read_vm_firewall_configs {
8aef5177
DM		 2316 my ($vmdata, $dir) = @_;
2317
6fc63ffd 2318 my $vmfw_configs = {};
c8301d63 2319
5e1267a5 2320 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
8aef5177 2321 my $vmfw_conf = load_vmfw_conf($vmid, $dir);
e7b35711
DM		 2322 next if !$vmfw_conf->{options}; # skip if file does not exists
2323 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM		 2324 }
2325
6fc63ffd 2326 return $vmfw_configs;
5e1267a5
DM		 2327}
2328
2d404ffc
DM		 2329sub get_option_log_level {
2330 my ($options, $k) = @_;
2331
2332 my $v = $options->{$k};
178a63be 2333 $v = $default_log_level if !defined($v);
2d404ffc
DM		 2334
2335 return undef if $v eq '' || $v eq 'nolog';
2336
2337 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2338
2339 return $v if ($v >= 0) && ($v <= 7);
2340
2341 warn "unknown log level ($k = '$v')\n";
2342
2343 return undef;
2344}
2345
d8f2505e 2346sub generate_std_chains {
2d404ffc 2347 my ($ruleset, $options) = @_;
cbb5d6f3 2348
2d404ffc
DM		 2349 my $loglevel = get_option_log_level($options, 'smurf_log_level');
2350
2351 # same as shorewall smurflog.
782c4cde 2352 my $chain = 'PVEFW-smurflog';
12f3796e 2353 $pve_std_chains->{$chain} = [];
782c4cde
DM		 2354
2355 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2356 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 2357
2358 # same as shorewall logflags action.
2359 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 2360 $chain = 'PVEFW-logflags';
12f3796e
DM		 2361 $pve_std_chains->{$chain} = [];
2362
782c4cde
DM		 2363 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2364 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2365 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 2366
2367 foreach my $chain (keys %$pve_std_chains) {
2368 ruleset_create_chain($ruleset, $chain);
2369 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2370 if (ref($rule)) {
2371 ruleset_generate_rule($ruleset, $chain, $rule);
2372 } else {
2373 ruleset_addrule($ruleset, $chain, $rule);
2374 }
2375 }
2376 }
2377}
2378
34cdedfa 2379sub generate_ipset_chains {
dd7a13fd 2380 my ($ipset_ruleset, $fw_conf) = @_;
34cdedfa 2381
dd7a13fd 2382 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
92e1209b 2383 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
34cdedfa
AD		 2384 }
2385}
2386
2387sub generate_ipset {
92e1209b 2388 my ($ipset_ruleset, $name, $options, $aliases) = @_;
34cdedfa 2389
dd7a13fd
DM		 2390 my $hashsize = scalar(@$options);
2391 if ($hashsize <= 64) {
2a052ee3 2392 $hashsize = 64;
dd7a13fd 2393 } else {
2a052ee3
AD		 2394 $hashsize = round_powerof2($hashsize);
2395 }
2396
dd7a13fd 2397 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
34cdedfa 2398
30f1b100
DM		 2399 # remove duplicates
2400 my $nethash = {};
9d6f90e6 2401 foreach my $entry (@$options) {
92e1209b 2402 my $cidr = $entry->{cidr};
d4091b82 2403 if ($cidr =~ m/^${ip_alias_pattern}$/) {
81d574a7
DM		 2404 my $alias = lc($cidr);
2405 if ($aliases->{$alias}) {
2406 $entry->{cidr} = $aliases->{$alias}->{cidr};
7dd13259 2407 $nethash->{$entry->{cidr}} = $entry;
d4091b82 2408 } else {
81d574a7 2409 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
d4091b82 2410 }
7dd13259
DM		 2411 } else {
2412 $nethash->{$entry->{cidr}} = $entry;
92e1209b 2413 }
30f1b100
DM		 2414 }
2415
2416 foreach my $cidr (sort keys %$nethash) {
2417 my $entry = $nethash->{$cidr};
2418
9d6f90e6
DM		 2419 my $cmd = "add $name $cidr";
2420 if ($entry->{nomatch}) {
2421 if ($feature_ipset_nomatch) {
2422 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2423 } else {
2424 warn "ignore !$cidr - nomatch not supported by kernel\n";
2425 }
2426 } else {
2427 push @{$ipset_ruleset->{$name}}, $cmd;
2428 }
34cdedfa 2429 }
2a052ee3
AD		 2430}
2431
2432sub round_powerof2 {
dd7a13fd 2433 my ($int) = @_;
2a052ee3 2434
dd7a13fd
DM		 2435 $int--;
2436 $int |= $int >> $_ foreach (1,2,4,8,16);
2437 return ++$int;
34cdedfa
AD		 2438}
2439
fca39c2c 2440sub load_clusterfw_conf {
8aef5177
DM		 2441 my ($filename) = @_;
2442
2443 $filename = $clusterfw_conf_filename if !defined($filename);
530c005e 2444
fca39c2c 2445 my $cluster_conf = {};
8aef5177
DM		 2446 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2447 $cluster_conf = parse_cluster_fw_rules($filename, $fh);
51bae274 2448 }
5e1267a5 2449
fca39c2c 2450 return $cluster_conf;
e5d76bde
DM		 2451}
2452
fca39c2c
DM		 2453sub save_clusterfw_conf {
2454 my ($cluster_conf) = @_;
9c7e0858
DM		 2455
2456 my $raw = '';
9c7e0858 2457
c6f5cc88 2458 my $options = $cluster_conf->{options};
68c90e21 2459 $raw .= &$format_options($options) if scalar(keys %$options);
9c7e0858 2460
0d5f0a0f
DM		 2461 my $aliases = $cluster_conf->{aliases};
2462 $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
e34d0e58 2463
9d6f90e6 2464 foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
d72c631c 2465 if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
649e4d57
DM		 2466 my $utf8comment = encode('utf8', $comment);
2467 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
d72c631c
DM		 2468 } else {
2469 $raw .= "[IPSET $ipset]\n\n";
2470 }
9d6f90e6
DM		 2471 my $options = $cluster_conf->{ipset}->{$ipset};
2472 $raw .= &$format_ipset($options);
2473 $raw .= "\n";
2474 }
c6f5cc88
DM		 2475
2476 my $rules = $cluster_conf->{rules};
2477 if (scalar(@$rules)) {
2478 $raw .= "[RULES]\n\n";
63c91681 2479 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 2480 $raw .= "\n";
2481 }
2482
2483 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2484 my $rules = $cluster_conf->{groups}->{$group};
0d22acb3 2485 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
649e4d57
DM		 2486 my $utf8comment = encode('utf8', $comment);
2487 $raw .= "[group $group] # $utf8comment\n\n";
0d22acb3
DM		 2488 } else {
2489 $raw .= "[group $group]\n\n";
2490 }
2491
63c91681 2492 $raw .= &$format_rules($rules, 0);
9c7e0858
DM		 2493 $raw .= "\n";
2494 }
2495
fca39c2c 2496 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM		 2497}
2498
8b27beb9 2499sub load_hostfw_conf {
8aef5177
DM		 2500 my ($filename) = @_;
2501
2502 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9
DM		 2503
2504 my $hostfw_conf = {};
8aef5177
DM		 2505 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2506 $hostfw_conf = parse_host_fw_rules($filename, $fh);
8b27beb9
DM		 2507 }
2508 return $hostfw_conf;
2509}
2510
63c91681
DM		 2511sub save_hostfw_conf {
2512 my ($hostfw_conf) = @_;
2513
2514 my $raw = '';
2515
2516 my $options = $hostfw_conf->{options};
68c90e21 2517 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2518
63c91681
DM		 2519 my $rules = $hostfw_conf->{rules};
2520 if (scalar(@$rules)) {
2521 $raw .= "[RULES]\n\n";
2522 $raw .= &$format_rules($rules, 1);
2523 $raw .= "\n";
2524 }
2525
2526 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2527}
2528
e5d76bde 2529sub compile {
8aef5177 2530 my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
3dfa8a7f 2531
8aef5177
DM		 2532 my $vmfw_configs;
2533
2534 if ($vmdata) { # test mode
2535 my $testdir = $vmdata->{testdir} || die "no test directory specified";
2536 my $filename = "$testdir/cluster.fw";
2537 die "missing test file '$filename'\n" if ! -f $filename;
2538 $cluster_conf = load_clusterfw_conf($filename);
2539
2540 $filename = "$testdir/host.fw";
2541 die "missing test file '$filename'\n" if ! -f $filename;
2542 $hostfw_conf = load_hostfw_conf($filename);
2543
2544 $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2545 } else { # normal operation
2546 $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2547
2548 $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2549
2550 $vmdata = read_local_vm_config();
2551 $vmfw_configs = read_vm_firewall_configs($vmdata);
2552 }
3dfa8a7f 2553
e5d76bde 2554
27083984 2555 $cluster_conf->{ipset}->{venet0} = [];
34cdedfa 2556
3fa83edf
DM		 2557 my $ruleset = {};
2558
dec84fcd
DM		 2559 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2560 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2561
fadb13dd 2562 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 2563
8b27beb9 2564 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2565
88733a74
AD		 2566 # fixme: what log level should we use here?
2567 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2568
097820b0 2569 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
88733a74 2570
e2943485 2571 ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
27083984
AD		 2572 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2573 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
e2943485
DM		 2574
2575 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2428e394 2576 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
e2943485 2577
d1b41c08 2578 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
e2943485
DM		 2579
2580 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
d1b41c08 2581 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
e2943485
DM		 2582
2583 ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2428e394 2584 ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
e2943485 2585
27083984 2586 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
e2943485 2587
92e976b3 2588 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2589
6d2ab017 2590 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2591
fca39c2c 2592 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
3fa83edf 2593
27083984 2594 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
62689a1e 2595
6158271d 2596 # generate firewall rules for QEMU VMs
3fa83edf
DM		 2597 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2598 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 2599 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 2600 next if !$vmfw_conf;
2601 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 2602
2603 foreach my $netid (keys %$conf) {
2604 next if $netid !~ m/^net(\d+)$/;
2605 my $net = PVE::QemuServer::parse_net($conf->{$netid});
f953da2d 2606 next if !$net->{firewall};
3fa83edf 2607 my $iface = "tap${vmid}i$1";
5e1267a5 2608
c29f55c9 2609 my $macaddr = $net->{macaddr};
6bafd113 2610 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
a01c32c7 2611 $vmfw_conf, $vmid, 'IN');
6bafd113 2612 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
a01c32c7 2613 $vmfw_conf, $vmid, 'OUT');
3fa83edf
DM		 2614 }
2615 }
c8301d63
DM		 2616
2617 # generate firewall rules for OpenVZ containers
2618 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2619 my $conf = $vmdata->{openvz}->{$vmid};
2620
2621 my $vmfw_conf = $vmfw_configs->{$vmid};
2622 next if !$vmfw_conf;
2623 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2624
2625 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2626 my $ip = $conf->{ip_address}->{value};
e34d0e58 2627 $ip =~ s/\s+/,/g;
27083984
AD		 2628 parse_address_list($ip); # make sure we have a valid $ip list
2629
2630 my @ips = split(',', $ip);
2631
2632 foreach my $singleip (@ips) {
2633 my $venet0ipset = {};
2634 $venet0ipset->{cidr} = $singleip;
2635 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2636 }
2637
6bafd113
DM		 2638 generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2639 generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 2640 }
2641
2642 if ($conf->{netif} && $conf->{netif}->{value}) {
2643 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 2644 foreach my $netid (keys %$netif) {
2645 my $d = $netif->{$netid};
530c005e 2646
12d0f130 2647 my $macaddr = $d->{mac};
c8301d63 2648 my $iface = $d->{host_ifname};
6bafd113 2649 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
a01c32c7 2650 $vmfw_conf, $vmid, 'IN');
6bafd113 2651 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
a01c32c7 2652 $vmfw_conf, $vmid, 'OUT');
c8301d63
DM		 2653 }
2654 }
2655 }
c0413e35 2656
097820b0
AD		 2657 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2658 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2659 }
2660
27083984
AD		 2661 my $ipset_ruleset = {};
2662 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2663
3dfa8a7f 2664 return ($ruleset, $ipset_ruleset);
3fa83edf
DM		 2665}
2666
2667sub get_ruleset_status {
4bd0a9c4 2668 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM		 2669
2670 my $statushash = {};
2671
2672 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 2673 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 2674
3fa83edf
DM		 2675 $statushash->{$chain}->{sig} = $sig;
2676
2677 my $oldsig = $active_chains->{$chain};
2678 if (!defined($oldsig)) {
2679 $statushash->{$chain}->{action} = 'create';
2680 } else {
2681 if ($oldsig eq $sig) {
2682 $statushash->{$chain}->{action} = 'exists';
2683 } else {
2684 $statushash->{$chain}->{action} = 'update';
2685 }
2686 }
2687 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2688 foreach my $cmd (@{$ruleset->{$chain}}) {
2689 print "\t$cmd\n" if $verbose;
2690 }
2691 }
2692
2693 foreach my $chain (sort keys %$active_chains) {
2694 if (!defined($ruleset->{$chain})) {
2695 my $sig = $active_chains->{$chain};
2696 $statushash->{$chain}->{action} = 'delete';
2697 $statushash->{$chain}->{sig} = $sig;
2698 print "delete $chain ($sig)\n" if $verbose;
2699 }
6158271d 2700 }
2a052ee3 2701
3fa83edf
DM		 2702 return $statushash;
2703}
2704
3fa83edf
DM		 2705sub print_sig_rule {
2706 my ($chain, $sig) = @_;
2707
09d5f68e
DM		 2708 # We just use this to store a SHA1 checksum used to detect changes
2709 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 2710}
2711
df7cb349 2712sub get_ruleset_cmdlist {
a84f4d96 2713 my ($ruleset, $verbose) = @_;
3fa83edf 2714
3fa83edf 2715 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 2716
4bd0a9c4
DM		 2717 my ($active_chains, $hooks) = iptables_get_chains();
2718 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM		 2719
2720 # create missing chains first
2721 foreach my $chain (sort keys %$ruleset) {
2722 my $stat = $statushash->{$chain};
2723 die "internal error" if !$stat;
2724 next if $stat->{action} ne 'create';
886aba9c 2725
3fa83edf
DM		 2726 $cmdlist .= ":$chain - [0:0]\n";
2727 }
2728
4bd0a9c4
DM		 2729 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2730 if (!$hooks->{$h}) {
2731 $cmdlist .= "-A $h -j PVEFW-$h\n";
2732 }
3fa83edf
DM		 2733 }
2734
2735 foreach my $chain (sort keys %$ruleset) {
2736 my $stat = $statushash->{$chain};
2737 die "internal error" if !$stat;
2738
2739 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2740 $cmdlist .= "-F $chain\n";
2741 foreach my $cmd (@{$ruleset->{$chain}}) {
2742 $cmdlist .= "$cmd\n";
2743 }
2744 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2745 } elsif ($stat->{action} eq 'delete') {
f5d28682 2746 die "internal error"; # this should not happen
3fa83edf
DM		 2747 } elsif ($stat->{action} eq 'exists') {
2748 # do nothing
2749 } else {
2750 die "internal error - unknown status '$stat->{action}'";
2751 }
2752 }
2753
f5d28682
DM		 2754 foreach my $chain (keys %$statushash) {
2755 next if $statushash->{$chain}->{action} ne 'delete';
2756 $cmdlist .= "-F $chain\n";
2757 }
2758 foreach my $chain (keys %$statushash) {
2759 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 2760 next if $chain eq 'PVEFW-INPUT';
2761 next if $chain eq 'PVEFW-OUTPUT';
2762 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 2763 $cmdlist .= "-X $chain\n";
2764 }
2765
3f95d14a 2766 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 2767
3fa83edf
DM		 2768 $cmdlist .= "COMMIT\n";
2769
3f95d14a 2770 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 2771}
2772
34cdedfa 2773sub get_ipset_cmdlist {
dd7a13fd 2774 my ($ruleset, $verbose) = @_;
34cdedfa
AD		 2775
2776 my $cmdlist = "";
2777
dd7a13fd
DM		 2778 my $delete_cmdlist = "";
2779
4bd0a9c4
DM		 2780 my $active_chains = ipset_get_chains();
2781 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 2782
e34d0e58 2783 # remove stale _swap chains
30f1b100
DM		 2784 foreach my $chain (keys %$active_chains) {
2785 if ($chain =~ m/^PVEFW-\S+_swap$/) {
2786 $cmdlist .= "destroy $chain\n";
2787 }
2788 }
2789
dd7a13fd
DM		 2790 foreach my $chain (sort keys %$ruleset) {
2791 my $stat = $statushash->{$chain};
2792 die "internal error" if !$stat;
2a052ee3 2793
dd7a13fd
DM		 2794 if ($stat->{action} eq 'create') {
2795 foreach my $cmd (@{$ruleset->{$chain}}) {
34cdedfa
AD		 2796 $cmdlist .= "$cmd\n";
2797 }
dd7a13fd 2798 }
34cdedfa 2799
dd7a13fd
DM		 2800 if ($stat->{action} eq 'update') {
2801 my $chain_swap = $chain."_swap";
cbb5d6f3 2802
dd7a13fd
DM		 2803 foreach my $cmd (@{$ruleset->{$chain}}) {
2804 $cmd =~ s/$chain/$chain_swap/;
2805 $cmdlist .= "$cmd\n";
34cdedfa 2806 }
dd7a13fd
DM		 2807 $cmdlist .= "swap $chain_swap $chain\n";
2808 $cmdlist .= "flush $chain_swap\n";
2809 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 2810 }
34cdedfa 2811
dd7a13fd 2812 }
3f95d14a 2813
dd7a13fd
DM		 2814 foreach my $chain (keys %$statushash) {
2815 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 2816
dd7a13fd
DM		 2817 $delete_cmdlist .= "flush $chain\n";
2818 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 2819 }
2820
dd7a13fd 2821 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 2822
dd7a13fd 2823 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 2824}
2825
6b9f68a2 2826sub apply_ruleset {
34cdedfa 2827 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM		 2828
2829 enable_bridge_firewall();
2830
cbb5d6f3 2831 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
81a0bf43 2832 get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
6b9f68a2 2833
81a0bf43 2834 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2a052ee3 2835
81a0bf43
DM		 2836 if ($verbose) {
2837 if ($ipset_changes) {
2838 print "ipset changes:\n";
2839 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2840 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2841 }
3f95d14a 2842
81a0bf43
DM		 2843 if ($changes) {
2844 print "iptables changes:\n";
2845 print $cmdlist;
2846 }
2847 }
3fa83edf 2848
2a052ee3 2849 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 2850
3fa83edf
DM		 2851 iptables_restore_cmdlist($cmdlist);
2852
dd7a13fd 2853 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 2854
6158271d 2855 # test: re-read status and check if everything is up to date
4bd0a9c4 2856 my $active_chains = iptables_get_chains();
81a0bf43 2857 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3fa83edf
DM		 2858
2859 my $errors;
2860 foreach my $chain (sort keys %$ruleset) {
2861 my $stat = $statushash->{$chain};
2862 if ($stat->{action} ne 'exists') {
2863 warn "unable to update chain '$chain'\n";
2864 $errors = 1;
2865 }
2866 }
b6360c3f 2867
3fa83edf 2868 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 2869
2870 update_nf_conntrack_max($hostfw_conf);
2871
2872 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2873
b6360c3f
DM		 2874}
2875
490cdead
DM		 2876sub update_nf_conntrack_max {
2877 my ($hostfw_conf) = @_;
2878
2879 my $max = 65536; # reasonable default
2880
2881 my $options = $hostfw_conf->{options} || {};
2882
2883 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2884 $max = $options->{nf_conntrack_max};
2885 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2886 }
2887
2888 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2889 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2890
2891 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2892
2893 if ($current != $max) {
2894 my $hashsize = int($max/4);
2895 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2896 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2897 }
2898}
2899
28c082a1
AD		 2900sub update_nf_conntrack_tcp_timeout_established {
2901 my ($hostfw_conf) = @_;
2902
2903 my $options = $hostfw_conf->{options} || {};
2904
2905 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2906
2907 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2908}
2909
c4a2e5ae
DM		 2910sub remove_pvefw_chains {
2911
2912 my ($chash, $hooks) = iptables_get_chains();
2913 my $cmdlist = "*filter\n";
2914
2915 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2916 if ($hooks->{$h}) {
2917 $cmdlist .= "-D $h -j PVEFW-$h\n";
2918 }
2919 }
cbb5d6f3 2920
c4a2e5ae
DM		 2921 foreach my $chain (keys %$chash) {
2922 $cmdlist .= "-F $chain\n";
2923 }
2924
2925 foreach my $chain (keys %$chash) {
2926 $cmdlist .= "-X $chain\n";
2927 }
2928 $cmdlist .= "COMMIT\n";
2929
2930 iptables_restore_cmdlist($cmdlist);
2931}
2932
6b9f68a2 2933sub update {
e2beb7aa 2934 my ($verbose) = @_;
6b9f68a2
DM		 2935
2936 my $code = sub {
3dfa8a7f
DM		 2937
2938 my $cluster_conf = load_clusterfw_conf();
2939 my $cluster_options = $cluster_conf->{options};
2940
51e57fee 2941 my $enable = $cluster_options->{enable};
3dfa8a7f 2942
e2beb7aa 2943 die "Firewall is disabled - cannot start\n" if !$enable;
3dfa8a7f
DM		 2944
2945 if (!$enable) {
b22130d3 2946 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 2947 print "Firewall disabled\n" if $verbose;
2948 return;
2949 }
2950
2951 my $hostfw_conf = load_hostfw_conf();
2952
2953 my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
490cdead 2954
e2beb7aa 2955 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM		 2956 };
2957
2958 run_locked($code);
2959}
2960
2961
b6360c3f 29621;
Firewall test scripts