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remove redundant checks
[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;
6d959e3f 8use Socket qw(AF_INET6 inet_ntop inet_pton);
c8301d63 9use PVE::INotify;
7ca36671 10use PVE::Exception qw(raise raise_param_exc);
e74a87f5 11use PVE::JSONSchema qw(register_standard_option get_standard_option);
c8301d63 12use PVE::Cluster;
5f0a912c 13use PVE::ProcFSTools;
70e524eb 14use PVE::Tools qw($IPV4RE $IPV6RE);
2e1ae6b9 15use PVE::Network;
6b9f68a2 16use File::Basename;
5e1267a5
DM		 17use File::Path;
18use IO::File;
ecbea048 19use Net::IP;
1a301a8d 20use PVE::Tools qw(run_command lock_file dir_glob_foreach);
30c1ae52 21use Encode;
ecbea048 22
63c91681 23my $hostfw_conf_filename = "/etc/pve/local/host.fw";
21053409
DM		 24my $pvefw_conf_dir = "/etc/pve/firewall";
25my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
fca39c2c 26
fdefeeab 27# dynamically include PVE::QemuServer and PVE::LXC
d9fee004
DM		 28# to avoid dependency problems
29my $have_qemu_server;
30eval {
31 require PVE::QemuServer;
b5a16dd3 32 require PVE::QemuConfig;
d9fee004
DM		 33 $have_qemu_server = 1;
34};
35
3b4882dc
AG		 36my $have_lxc;
37eval {
38 require PVE::LXC;
39 $have_lxc = 1;
40};
41
42
259db1e6
DM		 43my $pve_fw_status_dir = "/var/lib/pve-firewall";
44
45mkdir $pve_fw_status_dir; # make sure this exists
46
351052d1
DM		 47my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
48my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
f9792937 49our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
351052d1
DM		 50
51my $max_alias_name_length = 64;
52my $max_ipset_name_length = 64;
5c53cde4 53my $max_group_name_length = 18;
351052d1 54
ae029a88
DM		 55PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
56sub pve_verify_ip_or_cidr {
009ee3ac
DM		 57 my ($cidr, $noerr) = @_;
58
70e524eb 59 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
e34d0e58 60 return $cidr if Net::IP->new($cidr);
7c619bbb
DM		 61 return undef if $noerr;
62 die Net::IP::Error() . "\n";
63 }
64 return undef if $noerr;
65 die "value does not look like a valid IP address or CIDR network\n";
66}
67
ae029a88
DM		 68PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
69sub pve_verify_ip_or_cidr_or_alias {
7c619bbb
DM		 70 my ($cidr, $noerr) = @_;
71
72 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
73
ae029a88 74 return pve_verify_ip_or_cidr($cidr, $noerr);
009ee3ac
DM		 75}
76
e74a87f5
DM		 77PVE::JSONSchema::register_standard_option('ipset-name', {
78 description => "IP set name.",
79 type => 'string',
351052d1 80 pattern => $ipset_name_pattern,
387d0ffc 81 minLength => 2,
351052d1 82 maxLength => $max_ipset_name_length,
387d0ffc
DM		 83});
84
81d574a7
DM		 85PVE::JSONSchema::register_standard_option('pve-fw-alias', {
86 description => "Alias name.",
87 type => 'string',
351052d1 88 pattern => $ip_alias_pattern,
81d574a7 89 minLength => 2,
351052d1 90 maxLength => $max_alias_name_length,
81d574a7
DM		 91});
92
6302c41f
DM		 93PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
94 description => "Log level.",
e34d0e58 95 type => 'string',
6302c41f
DM		 96 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
97 optional => 1,
98});
99
387d0ffc
DM		 100PVE::JSONSchema::register_standard_option('pve-security-group-name', {
101 description => "Security Group name.",
102 type => 'string',
44be8ceb 103 pattern => $security_group_name_pattern,
387d0ffc 104 minLength => 2,
351052d1 105 maxLength => $max_group_name_length,
e74a87f5 106});
009ee3ac 107
cbb5d6f3
DM		 108my $feature_ipset_nomatch = 0;
109eval {
110 my (undef, undef, $release) = POSIX::uname();
111 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
112 my ($major, $minor) = ($1, $2);
113 $feature_ipset_nomatch = 1 if ($major > 3) ||
114 ($major == 3 && $minor >= 7);
115 }
116
117};
118
c8301d63
DM		 119my $nodename = PVE::INotify::nodename();
120
06320eb0
DM		 121my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
122
56f313f7 123my $default_log_level = 'nolog'; # avoid logs by default
2d404ffc
DM		 124
125my $log_level_hash = {
126 debug => 7,
127 info => 6,
128 notice => 5,
129 warning => 4,
130 err => 3,
131 crit => 2,
132 alert => 1,
133 emerg => 0,
134};
135
35d1d6da
DM		 136# we need to overwrite some macros for ipv6
137my $pve_ipv6fw_macros = {
138 'Ping' => [
139 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
140 ],
b3d75afb
WB		 141 'NeighborDiscovery' => [
142 "IPv6 neighbor solicitation, neighbor and router advertisement",
c71cdd44 143 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
b3d75afb
WB		 144 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
145 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
146 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
147 ],
a42e9763 148 'DHCPv6' => [
24dd51c2 149 "DHCPv6 traffic",
a42e9763
WB		 150 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
151 ],
35d1d6da
DM		 152 'Trcrt' => [
153 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
154 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
155 ],
156 };
157
857f62c8 158# imported/converted from: /usr/share/shorewall/macro.*
961b4928 159my $pve_fw_macros = {
857f62c8 160 'Amanda' => [
ebd54ae9 161 "Amanda Backup",
857f62c8
DM		 162 { action => 'PARAM', proto => 'udp', dport => '10080' },
163 { action => 'PARAM', proto => 'tcp', dport => '10080' },
164 ],
165 'Auth' => [
ebd54ae9 166 "Auth (identd) traffic",
857f62c8
DM		 167 { action => 'PARAM', proto => 'tcp', dport => '113' },
168 ],
169 'BGP' => [
ebd54ae9 170 "Border Gateway Protocol traffic",
857f62c8
DM		 171 { action => 'PARAM', proto => 'tcp', dport => '179' },
172 ],
173 'BitTorrent' => [
ebd54ae9 174 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 175 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 176 { action => 'PARAM', proto => 'udp', dport => '6881' },
177 ],
178 'BitTorrent32' => [
ebd54ae9 179 "BitTorrent traffic for BitTorrent 3.2 and later",
857f62c8
DM		 180 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
181 { action => 'PARAM', proto => 'udp', dport => '6881' },
182 ],
06ba9c44
AG		 183 'Ceph' => [
184 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
185 { action => 'PARAM', proto => 'tcp', dport => '6789' },
186 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
187 ],
857f62c8 188 'CVS' => [
ebd54ae9 189 "Concurrent Versions System pserver traffic",
857f62c8
DM		 190 { action => 'PARAM', proto => 'tcp', dport => '2401' },
191 ],
192 'Citrix' => [
ebd54ae9 193 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 194 { action => 'PARAM', proto => 'tcp', dport => '1494' },
195 { action => 'PARAM', proto => 'udp', dport => '1604' },
196 { action => 'PARAM', proto => 'tcp', dport => '2598' },
197 ],
198 'DAAP' => [
ebd54ae9 199 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 200 { action => 'PARAM', proto => 'tcp', dport => '3689' },
201 { action => 'PARAM', proto => 'udp', dport => '3689' },
202 ],
203 'DCC' => [
ebd54ae9 204 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 205 { action => 'PARAM', proto => 'tcp', dport => '6277' },
206 ],
207 'DHCPfwd' => [
d2c3266d 208 "Forwarded DHCP traffic",
857f62c8 209 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 210 ],
211 'DNS' => [
ebd54ae9 212 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 213 { action => 'PARAM', proto => 'udp', dport => '53' },
214 { action => 'PARAM', proto => 'tcp', dport => '53' },
215 ],
216 'Distcc' => [
ebd54ae9 217 "Distributed Compiler service",
857f62c8
DM		 218 { action => 'PARAM', proto => 'tcp', dport => '3632' },
219 ],
857f62c8 220 'FTP' => [
ebd54ae9 221 "File Transfer Protocol",
857f62c8
DM		 222 { action => 'PARAM', proto => 'tcp', dport => '21' },
223 ],
224 'Finger' => [
ebd54ae9 225 "Finger protocol (RFC 742)",
857f62c8
DM		 226 { action => 'PARAM', proto => 'tcp', dport => '79' },
227 ],
228 'GNUnet' => [
ebd54ae9 229 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 230 { action => 'PARAM', proto => 'tcp', dport => '2086' },
231 { action => 'PARAM', proto => 'udp', dport => '2086' },
232 { action => 'PARAM', proto => 'tcp', dport => '1080' },
233 { action => 'PARAM', proto => 'udp', dport => '1080' },
234 ],
235 'GRE' => [
d2c3266d 236 "Generic Routing Encapsulation tunneling protocol",
857f62c8 237 { action => 'PARAM', proto => '47' },
857f62c8
DM		 238 ],
239 'Git' => [
ebd54ae9 240 "Git distributed revision control traffic",
857f62c8
DM		 241 { action => 'PARAM', proto => 'tcp', dport => '9418' },
242 ],
857f62c8 243 'HKP' => [
ebd54ae9 244 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 245 { action => 'PARAM', proto => 'tcp', dport => '11371' },
246 ],
247 'HTTP' => [
ebd54ae9 248 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 249 { action => 'PARAM', proto => 'tcp', dport => '80' },
250 ],
857f62c8 251 'HTTPS' => [
ebd54ae9 252 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 253 { action => 'PARAM', proto => 'tcp', dport => '443' },
254 ],
255 'ICPV2' => [
ebd54ae9 256 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 257 { action => 'PARAM', proto => 'udp', dport => '3130' },
258 ],
259 'ICQ' => [
ebd54ae9 260 "AOL Instant Messenger traffic",
857f62c8
DM		 261 { action => 'PARAM', proto => 'tcp', dport => '5190' },
262 ],
263 'IMAP' => [
ebd54ae9 264 "Internet Message Access Protocol",
857f62c8
DM		 265 { action => 'PARAM', proto => 'tcp', dport => '143' },
266 ],
267 'IMAPS' => [
ebd54ae9 268 "Internet Message Access Protocol over SSL",
857f62c8
DM		 269 { action => 'PARAM', proto => 'tcp', dport => '993' },
270 ],
271 'IPIP' => [
d2c3266d 272 "IPIP capsulation traffic",
857f62c8 273 { action => 'PARAM', proto => '94' },
857f62c8 274 ],
857f62c8 275 'IPsec' => [
d2c3266d 276 "IPsec traffic",
857f62c8
DM		 277 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
278 { action => 'PARAM', proto => '50' },
857f62c8
DM		 279 ],
280 'IPsecah' => [
d2c3266d 281 "IPsec authentication (AH) traffic",
857f62c8
DM		 282 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
283 { action => 'PARAM', proto => '51' },
857f62c8
DM		 284 ],
285 'IPsecnat' => [
d2c3266d 286 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 287 { action => 'PARAM', proto => 'udp', dport => '500' },
288 { action => 'PARAM', proto => 'udp', dport => '4500' },
289 { action => 'PARAM', proto => '50' },
857f62c8
DM		 290 ],
291 'IRC' => [
ebd54ae9 292 "Internet Relay Chat traffic",
857f62c8
DM		 293 { action => 'PARAM', proto => 'tcp', dport => '6667' },
294 ],
857f62c8 295 'Jetdirect' => [
ebd54ae9 296 "HP Jetdirect printing",
857f62c8
DM		 297 { action => 'PARAM', proto => 'tcp', dport => '9100' },
298 ],
299 'L2TP' => [
ebd54ae9 300 "Layer 2 Tunneling Protocol traffic",
857f62c8 301 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 302 ],
303 'LDAP' => [
ebd54ae9 304 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 305 { action => 'PARAM', proto => 'tcp', dport => '389' },
306 ],
307 'LDAPS' => [
ebd54ae9 308 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 309 { action => 'PARAM', proto => 'tcp', dport => '636' },
310 ],
311 'MSNP' => [
ebd54ae9 312 "Microsoft Notification Protocol",
857f62c8
DM		 313 { action => 'PARAM', proto => 'tcp', dport => '1863' },
314 ],
315 'MSSQL' => [
ebd54ae9 316 "Microsoft SQL Server",
857f62c8
DM		 317 { action => 'PARAM', proto => 'tcp', dport => '1433' },
318 ],
319 'Mail' => [
ebd54ae9 320 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 321 { action => 'PARAM', proto => 'tcp', dport => '25' },
322 { action => 'PARAM', proto => 'tcp', dport => '465' },
323 { action => 'PARAM', proto => 'tcp', dport => '587' },
324 ],
7831e1e3
EK		 325 'MDNS' => [
326 "Multicast DNS",
327 { action => 'PARAM', proto => 'udp', dport => '5353' },
328 ],
857f62c8 329 'Munin' => [
ebd54ae9 330 "Munin networked resource monitoring traffic",
857f62c8
DM		 331 { action => 'PARAM', proto => 'tcp', dport => '4949' },
332 ],
333 'MySQL' => [
ebd54ae9 334 "MySQL server",
857f62c8
DM		 335 { action => 'PARAM', proto => 'tcp', dport => '3306' },
336 ],
337 'NNTP' => [
ebd54ae9 338 "NNTP traffic (Usenet).",
857f62c8
DM		 339 { action => 'PARAM', proto => 'tcp', dport => '119' },
340 ],
341 'NNTPS' => [
ebd54ae9 342 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 343 { action => 'PARAM', proto => 'tcp', dport => '563' },
344 ],
345 'NTP' => [
ebd54ae9 346 "Network Time Protocol (ntpd)",
857f62c8
DM		 347 { action => 'PARAM', proto => 'udp', dport => '123' },
348 ],
857f62c8 349 'OSPF' => [
ebd54ae9 350 "OSPF multicast traffic",
857f62c8
DM		 351 { action => 'PARAM', proto => '89' },
352 ],
353 'OpenVPN' => [
ebd54ae9 354 "OpenVPN traffic",
857f62c8
DM		 355 { action => 'PARAM', proto => 'udp', dport => '1194' },
356 ],
357 'PCA' => [
ebd54ae9 358 "Symantec PCAnywere (tm)",
857f62c8
DM		 359 { action => 'PARAM', proto => 'udp', dport => '5632' },
360 { action => 'PARAM', proto => 'tcp', dport => '5631' },
361 ],
362 'POP3' => [
ebd54ae9 363 "POP3 traffic",
857f62c8
DM		 364 { action => 'PARAM', proto => 'tcp', dport => '110' },
365 ],
366 'POP3S' => [
ebd54ae9 367 "Encrypted POP3 traffic",
857f62c8
DM		 368 { action => 'PARAM', proto => 'tcp', dport => '995' },
369 ],
370 'PPtP' => [
ebd54ae9 371 "Point-to-Point Tunneling Protocol",
857f62c8 372 { action => 'PARAM', proto => '47' },
857f62c8
DM		 373 { action => 'PARAM', proto => 'tcp', dport => '1723' },
374 ],
375 'Ping' => [
ebd54ae9 376 "ICMP echo request",
269d4f13 377 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 378 ],
379 'PostgreSQL' => [
ebd54ae9 380 "PostgreSQL server",
857f62c8
DM		 381 { action => 'PARAM', proto => 'tcp', dport => '5432' },
382 ],
383 'Printer' => [
ebd54ae9 384 "Line Printer protocol printing",
857f62c8
DM		 385 { action => 'PARAM', proto => 'tcp', dport => '515' },
386 ],
387 'RDP' => [
ebd54ae9 388 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 389 { action => 'PARAM', proto => 'tcp', dport => '3389' },
390 ],
d2c3266d 391 'RIP' => [
ebd54ae9 392 "Routing Information Protocol (bidirectional)",
857f62c8 393 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 394 ],
395 'RNDC' => [
ebd54ae9 396 "BIND remote management protocol",
857f62c8
DM		 397 { action => 'PARAM', proto => 'tcp', dport => '953' },
398 ],
399 'Razor' => [
ebd54ae9 400 "Razor Antispam System",
857f62c8
DM		 401 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
402 ],
403 'Rdate' => [
ebd54ae9 404 "Remote time retrieval (rdate)",
857f62c8
DM		 405 { action => 'PARAM', proto => 'tcp', dport => '37' },
406 ],
407 'Rsync' => [
ebd54ae9 408 "Rsync server",
857f62c8
DM		 409 { action => 'PARAM', proto => 'tcp', dport => '873' },
410 ],
411 'SANE' => [
ebd54ae9 412 "SANE network scanning",
857f62c8
DM		 413 { action => 'PARAM', proto => 'tcp', dport => '6566' },
414 ],
415 'SMB' => [
ebd54ae9 416 "Microsoft SMB traffic",
857f62c8
DM		 417 { action => 'PARAM', proto => 'udp', dport => '135,445' },
418 { action => 'PARAM', proto => 'udp', dport => '137:139' },
419 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
420 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
421 ],
857f62c8 422 'SMBswat' => [
ebd54ae9 423 "Samba Web Administration Tool",
857f62c8
DM		 424 { action => 'PARAM', proto => 'tcp', dport => '901' },
425 ],
426 'SMTP' => [
ebd54ae9 427 "Simple Mail Transfer Protocol",
857f62c8
DM		 428 { action => 'PARAM', proto => 'tcp', dport => '25' },
429 ],
430 'SMTPS' => [
ebd54ae9 431 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 432 { action => 'PARAM', proto => 'tcp', dport => '465' },
433 ],
434 'SNMP' => [
ebd54ae9 435 "Simple Network Management Protocol",
857f62c8
DM		 436 { action => 'PARAM', proto => 'udp', dport => '161:162' },
437 { action => 'PARAM', proto => 'tcp', dport => '161' },
438 ],
439 'SPAMD' => [
ebd54ae9 440 "Spam Assassin SPAMD traffic",
857f62c8
DM		 441 { action => 'PARAM', proto => 'tcp', dport => '783' },
442 ],
443 'SSH' => [
ebd54ae9 444 "Secure shell traffic",
857f62c8
DM		 445 { action => 'PARAM', proto => 'tcp', dport => '22' },
446 ],
447 'SVN' => [
ebd54ae9 448 "Subversion server (svnserve)",
857f62c8
DM		 449 { action => 'PARAM', proto => 'tcp', dport => '3690' },
450 ],
451 'SixXS' => [
ebd54ae9 452 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 453 { action => 'PARAM', proto => 'tcp', dport => '3874' },
454 { action => 'PARAM', proto => 'udp', dport => '3740' },
455 { action => 'PARAM', proto => '41' },
456 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
457 ],
458 'Squid' => [
ebd54ae9 459 "Squid web proxy traffic",
857f62c8
DM		 460 { action => 'PARAM', proto => 'tcp', dport => '3128' },
461 ],
462 'Submission' => [
ebd54ae9 463 "Mail message submission traffic",
857f62c8
DM		 464 { action => 'PARAM', proto => 'tcp', dport => '587' },
465 ],
466 'Syslog' => [
ebd54ae9 467 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 468 { action => 'PARAM', proto => 'udp', dport => '514' },
469 { action => 'PARAM', proto => 'tcp', dport => '514' },
470 ],
471 'TFTP' => [
ebd54ae9 472 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 473 { action => 'PARAM', proto => 'udp', dport => '69' },
474 ],
475 'Telnet' => [
ebd54ae9 476 "Telnet traffic",
857f62c8
DM		 477 { action => 'PARAM', proto => 'tcp', dport => '23' },
478 ],
479 'Telnets' => [
ebd54ae9 480 "Telnet over SSL",
857f62c8
DM		 481 { action => 'PARAM', proto => 'tcp', dport => '992' },
482 ],
483 'Time' => [
ebd54ae9 484 "RFC 868 Time protocol",
857f62c8
DM		 485 { action => 'PARAM', proto => 'tcp', dport => '37' },
486 ],
487 'Trcrt' => [
ebd54ae9 488 "Traceroute (for up to 30 hops) traffic",
857f62c8 489 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 490 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 491 ],
492 'VNC' => [
93be4333
DM		 493 "VNC traffic for VNC display's 0 - 99",
494 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
857f62c8
DM		 495 ],
496 'VNCL' => [
ebd54ae9 497 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 498 { action => 'PARAM', proto => 'tcp', dport => '5500' },
499 ],
500 'Web' => [
ebd54ae9 501 "WWW traffic (HTTP and HTTPS)",
857f62c8 502 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 503 { action => 'PARAM', proto => 'tcp', dport => '443' },
504 ],
857f62c8 505 'Webcache' => [
ebd54ae9 506 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 507 { action => 'PARAM', proto => 'tcp', dport => '8080' },
508 ],
509 'Webmin' => [
ebd54ae9 510 "Webmin traffic",
857f62c8
DM		 511 { action => 'PARAM', proto => 'tcp', dport => '10000' },
512 ],
513 'Whois' => [
ebd54ae9 514 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 515 { action => 'PARAM', proto => 'tcp', dport => '43' },
516 ],
961b4928
DM		 517};
518
519my $pve_fw_parsed_macros;
ebd54ae9 520my $pve_fw_macro_descr;
21a18e53 521my $pve_fw_macro_ipversion = {};
961b4928 522my $pve_fw_preferred_macro_names = {};
3a616aa0 523
fe3d79b4
WB		 524my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
525my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
526
5547adf7
AD		 527my $pve_std_chains = {};
528$pve_std_chains->{4} = {
d8f2505e 529 'PVEFW-SET-ACCEPT-MARK' => [
fe3d79b4 530 "-j MARK --set-mark $FWACCEPTMARK_ON",
d8f2505e 531 ],
79929d9c
DM		 532 'PVEFW-DropBroadcast' => [
533 # same as shorewall 'Broadcast'
534 # simply DROP BROADCAST/MULTICAST/ANYCAST
535 # we can use this to reduce logging
536 { action => 'DROP', dsttype => 'BROADCAST' },
537 { action => 'DROP', dsttype => 'MULTICAST' },
538 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 539 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 540 ],
541 'PVEFW-reject' => [
542 # same as shorewall 'reject'
543 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 544 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c
DM		 545 { action => 'DROP', proto => 'icmp' },
546 "-p tcp -j REJECT --reject-with tcp-reset",
547 "-p udp -j REJECT --reject-with icmp-port-unreachable",
548 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
549 "-j REJECT --reject-with icmp-host-prohibited",
550 ],
551 'PVEFW-Drop' => [
cbb5d6f3 552 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 553 # but REJECT/DROP some packages to reduce logging,
554 # and ACCEPT critical ICMP types
555 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
556 # we are not interested in BROADCAST/MULTICAST/ANYCAST
557 { action => 'PVEFW-DropBroadcast' },
558 # ACCEPT critical ICMP types
559 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
560 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
561 # Drop packets with INVALID state
562 "-m conntrack --ctstate INVALID -j DROP",
563 # Drop Microsoft SMB noise
564 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
565 { action => 'DROP', proto => 'udp', dport => '137:139'},
566 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
567 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
568 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
569 # Drop new/NotSyn traffic so that it doesn't get logged
570 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
571 # Drop DNS replies
572 { action => 'DROP', proto => 'udp', sport => 53 },
573 ],
574 'PVEFW-Reject' => [
cbb5d6f3 575 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 576 # but REJECT/DROP some packages to reduce logging,
577 # and ACCEPT critical ICMP types
578 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
579 # we are not interested in BROADCAST/MULTICAST/ANYCAST
580 { action => 'PVEFW-DropBroadcast' },
581 # ACCEPT critical ICMP types
582 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
583 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
584 # Drop packets with INVALID state
585 "-m conntrack --ctstate INVALID -j DROP",
586 # Drop Microsoft SMB noise
587 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
588 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
589 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
590 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
591 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
592 # Drop new/NotSyn traffic so that it doesn't get logged
593 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
594 # Drop DNS replies
595 { action => 'DROP', proto => 'udp', sport => 53 },
596 ],
d86659ef
DM		 597 'PVEFW-tcpflags' => [
598 # same as shorewall tcpflags action.
599 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
600 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
601 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
602 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
603 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
604 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
605 ],
bee633ab
DM		 606 'PVEFW-smurfs' => [
607 # same as shorewall smurfs action
608 # Filter packets for smurfs (packets with a broadcast address as the source).
32cbd582 609 "-s 0.0.0.0/32 -j RETURN", # allow DHCP
bee633ab
DM		 610 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
611 "-s 224.0.0.0/4 -g PVEFW-smurflog",
612 ],
d8f2505e
DM		 613};
614
47a79ff2
AD		 615$pve_std_chains->{6} = {
616 'PVEFW-SET-ACCEPT-MARK' => [
fe3d79b4 617 "-j MARK --set-mark $FWACCEPTMARK_ON",
47a79ff2
AD		 618 ],
619 'PVEFW-DropBroadcast' => [
620 # same as shorewall 'Broadcast'
621 # simply DROP BROADCAST/MULTICAST/ANYCAST
622 # we can use this to reduce logging
623 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
649cd835
DM		 624 # ipv6 addrtype does not work with kernel 2.6.32
625 #{ action => 'DROP', dsttype => 'MULTICAST' },
626 #{ action => 'DROP', dsttype => 'ANYCAST' },
627 { action => 'DROP', dest => 'ff00::/8' },
47a79ff2
AD		 628 #{ action => 'DROP', dest => '224.0.0.0/4' },
629 ],
630 'PVEFW-reject' => [
631 # same as shorewall 'reject'
632 #{ action => 'DROP', dsttype => 'BROADCAST' },
633 #{ action => 'DROP', source => '224.0.0.0/4' },
649cd835 634 { action => 'DROP', proto => 'icmpv6' },
47a79ff2
AD		 635 "-p tcp -j REJECT --reject-with tcp-reset",
636 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
637 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
638 #"-j REJECT --reject-with icmp-host-prohibited",
639 ],
640 'PVEFW-Drop' => [
641 # same as shorewall 'Drop', which is equal to DROP,
642 # but REJECT/DROP some packages to reduce logging,
643 # and ACCEPT critical ICMP types
649cd835 644 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
47a79ff2
AD		 645 # we are not interested in BROADCAST/MULTICAST/ANYCAST
646 { action => 'PVEFW-DropBroadcast' },
647 # ACCEPT critical ICMP types
648 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
649 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
650 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
651
652 # Drop packets with INVALID state
653 "-m conntrack --ctstate INVALID -j DROP",
654 # Drop Microsoft SMB noise
649cd835
DM		 655 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
656 { action => 'DROP', proto => 'udp', dport => '137:139'},
657 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
658 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
659 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
47a79ff2
AD		 660 # Drop new/NotSyn traffic so that it doesn't get logged
661 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
662 # Drop DNS replies
649cd835 663 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 664 ],
665 'PVEFW-Reject' => [
666 # same as shorewall 'Reject', which is equal to Reject,
667 # but REJECT/DROP some packages to reduce logging,
668 # and ACCEPT critical ICMP types
669 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
670 # we are not interested in BROADCAST/MULTICAST/ANYCAST
671 { action => 'PVEFW-DropBroadcast' },
672 # ACCEPT critical ICMP types
673 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
674 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
675 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
676
677 # Drop packets with INVALID state
678 "-m conntrack --ctstate INVALID -j DROP",
679 # Drop Microsoft SMB noise
680 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
681 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
682 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
683 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
684 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
685 # Drop new/NotSyn traffic so that it doesn't get logged
686 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
687 # Drop DNS replies
688 { action => 'DROP', proto => 'udp', sport => 53 },
689 ],
690 'PVEFW-tcpflags' => [
691 # same as shorewall tcpflags action.
692 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
693 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
694 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
695 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
696 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
697 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
698 ],
47a79ff2
AD		 699};
700
4b586518
DM		 701# iptables -p icmp -h
702my $icmp_type_names = {
703 any => 1,
704 'echo-reply' => 1,
705 'destination-unreachable' => 1,
706 'network-unreachable' => 1,
707 'host-unreachable' => 1,
708 'protocol-unreachable' => 1,
709 'port-unreachable' => 1,
710 'fragmentation-needed' => 1,
711 'source-route-failed' => 1,
712 'network-unknown' => 1,
713 'host-unknown' => 1,
714 'network-prohibited' => 1,
715 'host-prohibited' => 1,
716 'TOS-network-unreachable' => 1,
717 'TOS-host-unreachable' => 1,
718 'communication-prohibited' => 1,
719 'host-precedence-violation' => 1,
720 'precedence-cutoff' => 1,
721 'source-quench' => 1,
722 'redirect' => 1,
723 'network-redirect' => 1,
724 'host-redirect' => 1,
725 'TOS-network-redirect' => 1,
726 'TOS-host-redirect' => 1,
727 'echo-request' => 1,
728 'router-advertisement' => 1,
729 'router-solicitation' => 1,
730 'time-exceeded' => 1,
731 'ttl-zero-during-transit' => 1,
732 'ttl-zero-during-reassembly' => 1,
733 'parameter-problem' => 1,
734 'ip-header-bad' => 1,
735 'required-option-missing' => 1,
736 'timestamp-request' => 1,
737 'timestamp-reply' => 1,
738 'address-mask-request' => 1,
739 'address-mask-reply' => 1,
740};
741
041b9277
DM		 742# ip6tables -p icmpv6 -h
743
744my $icmpv6_type_names = {
745 'any' => 1,
746 'destination-unreachable' => 1,
747 'no-route' => 1,
748 'communication-prohibited' => 1,
749 'address-unreachable' => 1,
750 'port-unreachable' => 1,
751 'packet-too-big' => 1,
752 'time-exceeded' => 1,
753 'ttl-zero-during-transit' => 1,
754 'ttl-zero-during-reassembly' => 1,
755 'parameter-problem' => 1,
756 'bad-header' => 1,
757 'unknown-header-type' => 1,
758 'unknown-option' => 1,
759 'echo-request' => 1,
760 'echo-reply' => 1,
761 'router-solicitation' => 1,
762 'router-advertisement' => 1,
593604cc 763 'neighbor-solicitation' => 1,
041b9277 764 'neighbour-solicitation' => 1,
593604cc 765 'neighbor-advertisement' => 1,
041b9277
DM		 766 'neighbour-advertisement' => 1,
767 'redirect' => 1,
768};
769
54cd19a8 770sub init_firewall_macros {
6158271d 771
961b4928 772 $pve_fw_parsed_macros = {};
9aab3127 773
21a18e53
WB		 774 my $parse = sub {
775 my ($k, $macro) = @_;
e5076eee 776 my $lc_name = lc($k);
21a18e53
WB		 777 $pve_fw_macro_ipversion->{$k} = 0;
778 while (!ref($macro->[0])) {
779 my $desc = shift @$macro;
780 if ($desc eq 'ipv4only') {
781 $pve_fw_macro_ipversion->{$k} = 4;
782 } elsif ($desc eq 'ipv6only') {
783 $pve_fw_macro_ipversion->{$k} = 6;
784 } else {
785 $pve_fw_macro_descr->{$k} = $desc;
786 }
ebd54ae9 787 }
e5076eee
DM		 788 $pve_fw_preferred_macro_names->{$lc_name} = $k;
789 $pve_fw_parsed_macros->{$k} = $macro;
21a18e53
WB		 790 };
791
792 foreach my $k (keys %$pve_fw_macros) {
793 &$parse($k, $pve_fw_macros->{$k});
794 }
795
796 foreach my $k (keys %$pve_ipv6fw_macros) {
797 next if $pve_fw_parsed_macros->{$k};
798 &$parse($k, $pve_ipv6fw_macros->{$k});
799 $pve_fw_macro_ipversion->{$k} = 6;
961b4928 800 }
9aab3127
DM		 801}
802
54cd19a8
DM		 803init_firewall_macros();
804
ebd54ae9
DM		 805sub get_macros {
806 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
807}
808
fcba0beb
DM		 809my $etc_services;
810
811sub get_etc_services {
812
813 return $etc_services if $etc_services;
814
815 my $filename = "/etc/services";
816
817 my $fh = IO::File->new($filename, O_RDONLY);
818 if (!$fh) {
819 warn "unable to read '$filename' - $!\n";
820 return {};
821 }
822
823 my $services = {};
824
825 while (my $line = <$fh>) {
826 chomp ($line);
827 next if $line =~m/^#/;
828 next if ($line =~m/^\s*$/);
829
830 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
831 $services->{byid}->{$2}->{name} = $1;
35b66e9d 832 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 833 $services->{byid}->{$2}->{$3} = 1;
834 $services->{byname}->{$1} = $services->{byid}->{$2};
835 }
836 }
837
838 close($fh);
839
6158271d
DM		 840 $etc_services = $services;
841
3a616aa0 842
fcba0beb
DM		 843 return $etc_services;
844}
845
846my $etc_protocols;
847
848sub get_etc_protocols {
849 return $etc_protocols if $etc_protocols;
850
851 my $filename = "/etc/protocols";
852
853 my $fh = IO::File->new($filename, O_RDONLY);
854 if (!$fh) {
855 warn "unable to read '$filename' - $!\n";
856 return {};
857 }
858
859 my $protocols = {};
860
861 while (my $line = <$fh>) {
862 chomp ($line);
863 next if $line =~m/^#/;
864 next if ($line =~m/^\s*$/);
865
866 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
867 $protocols->{byid}->{$2}->{name} = $1;
868 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
869 }
870 }
871
872 close($fh);
873
041b9277
DM		 874 # add special case for ICMP v6
875 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
876 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
877
fcba0beb
DM		 878 $etc_protocols = $protocols;
879
880 return $etc_protocols;
881}
882
525778d7 883my $__local_network;
93be4333 884
525778d7 885sub local_network {
ac633d30 886 my ($new_value) = @_;
93be4333 887
525778d7 888 $__local_network = $new_value if defined($new_value);
ac633d30 889
525778d7 890 return $__local_network if defined($__local_network);
93be4333
DM		 891
892 eval {
893 my $nodename = PVE::INotify::nodename();
894
895 my $ip = PVE::Cluster::remote_node_ip($nodename);
896
897 my $testip = Net::IP->new($ip);
bfc488f6 898
5dc356af
WB		 899 my $isv6 = $testip->version == 6;
900 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
901 : PVE::ProcFSTools::read_proc_net_route();
93be4333 902 foreach my $entry (@$routes) {
5dc356af
WB		 903 my $mask;
904 if ($isv6) {
905 $mask = $entry->{prefix};
906 } else {
2e1ae6b9 907 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
5dc356af
WB		 908 next if !defined($mask);
909 }
93be4333
DM		 910 my $cidr = "$entry->{dest}/$mask";
911 my $testnet = Net::IP->new($cidr);
5dc356af 912 if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
525778d7 913 $__local_network = $cidr;
93be4333
DM		 914 return;
915 }
916 }
917 };
918 warn $@ if $@;
919
525778d7 920 return $__local_network;
93be4333
DM		 921}
922
6d959e3f
DM		 923# ipset names are limited to 31 characters,
924# and we use '-v4' or '-v6' to indicate IP versions,
925# and we use '_swap' suffix for atomic update,
926# for example PVEFW-${VMID}-${ipset_name}_swap
30150dca 927
88c26d5e 928my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
708ba714
DM		 929
930sub compute_ipset_chain_name {
88c26d5e 931 my ($vmid, $ipset_name, $ipversion) = @_;
708ba714
DM		 932
933 $vmid = 0 if !defined($vmid);
934
88c26d5e 935 my $id = "$vmid-${ipset_name}-v$ipversion";
708ba714 936
88c26d5e 937 if (length($id) > $max_iptables_ipset_name_length) {
708ba714
DM		 938 $id = PVE::Tools::fnv31a_hex($id);
939 }
940
941 return "PVEFW-$id";
942}
943
b692f42c
DM		 944sub compute_ipfilter_ipset_name {
945 my ($iface) = @_;
946
947 return "ipfilter-$iface";
948}
949
ecbea048
DM		 950sub parse_address_list {
951 my ($str) = @_;
952
e2c62733
DM		 953 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
954 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
955 return;
956 }
957
958 if ($str =~ m/^${ip_alias_pattern}$/) {
959 die "alias name too long\n" if length($str) > $max_alias_name_length;
960 return;
961 }
d72beb8e 962
3162af6b
DM		 963 my $count = 0;
964 my $iprange = 0;
a589b6ac 965 my $ipversion;
7697c041 966
3162af6b
DM		 967 foreach my $elem (split(/,/, $str)) {
968 $count++;
c344e509
DM		 969 my $ip = Net::IP->new($elem);
970 if (!$ip) {
ecbea048
DM		 971 my $err = Net::IP::Error();
972 die "invalid IP address: $err\n";
973 }
3162af6b 974 $iprange = 1 if $elem =~ m/-/;
a589b6ac 975
c344e509 976 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
a589b6ac
DM		 977
978 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
006490cb 979 if $ipversion && ($new_ipversion != $ipversion);
a589b6ac
DM		 980
981 $ipversion = $new_ipversion;
ecbea048 982 }
e34d0e58 983
5163367b 984 die "you can't use a range in a list\n" if $iprange && $count > 1;
a589b6ac 985
7697c041 986 return $ipversion;
ecbea048 987}
dddd9413 988
fcba0beb 989sub parse_port_name_number_or_range {
a1c04f71 990 my ($str, $dport) = @_;
fcba0beb
DM		 991
992 my $services = PVE::Firewall::get_etc_services();
7ca36671 993 my $count = 0;
041b7e8e
DM		 994 my $icmp_port = 0;
995
fcba0beb 996 foreach my $item (split(/,/, $str)) {
7ca36671
DM		 997 $count++;
998 if ($item =~ m/^(\d+):(\d+)$/) {
999 my ($port1, $port2) = ($1, $2);
1000 die "invalid port '$port1'\n" if $port1 > 65535;
1001 die "invalid port '$port2'\n" if $port2 > 65535;
1002 } elsif ($item =~ m/^(\d+)$/) {
1003 my $port = $1;
1004 die "invalid port '$port'\n" if $port > 65535;
1005 } else {
a1c04f71 1006 if ($dport && $icmp_type_names->{$item}) {
041b7e8e 1007 $icmp_port = 1;
a1c04f71 1008 } elsif ($dport && $icmpv6_type_names->{$item}) {
041b9277 1009 $icmp_port = 1;
041b7e8e 1010 } else {
e34d0e58 1011 die "invalid port '$item'\n" if !$services->{byname}->{$item};
041b7e8e 1012 }
fcba0beb
DM		 1013 }
1014 }
1015
041b7e8e
DM		 1016 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1017
7ca36671 1018 return $count;
fcba0beb
DM		 1019}
1020
a1c04f71
WB		 1021PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1022sub pve_fw_verify_sport_spec {
1023 my ($portstr) = @_;
1024
1025 parse_port_name_number_or_range($portstr, 0);
1026
1027 return $portstr;
1028}
1029
1030PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1031sub pve_fw_verify_dport_spec {
54cd19a8
DM		 1032 my ($portstr) = @_;
1033
a1c04f71 1034 parse_port_name_number_or_range($portstr, 1);
54cd19a8
DM		 1035
1036 return $portstr;
1037}
1038
d31689ee
DM		 1039PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1040sub pve_fw_verify_addr_spec {
54cd19a8
DM		 1041 my ($list) = @_;
1042
1043 parse_address_list($list);
1044
1045 return $list;
1046}
1047
1048PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1049sub pve_fw_verify_protocol_spec {
1050 my ($proto) = @_;
1051
1052 my $protocols = get_etc_protocols();
1053
1054 die "unknown protocol '$proto'\n" if $proto &&
1055 !(defined($protocols->{byname}->{$proto}) ||
1056 defined($protocols->{byid}->{$proto}));
1057
1058 return $proto;
1059}
1060
1061
d1c53b3e 1062# helper function for API
d1c53b3e 1063
5d38d64f
DM		 1064sub copy_opject_with_digest {
1065 my ($object) = @_;
1066
1067 my $sha = Digest::SHA->new('sha1');
1068
1069 my $res = {};
1070 foreach my $k (sort keys %$object) {
1071 my $v = $object->{$k};
0365eb68 1072 next if !defined($v);
5d38d64f
DM		 1073 $res->{$k} = $v;
1074 $sha->add($k, ':', $v, "\n");
1075 }
1076
55e686c7 1077 my $digest = $sha->hexdigest;
5d38d64f
DM		 1078
1079 $res->{digest} = $digest;
1080
1081 return wantarray ? ($res, $digest) : $res;
1082}
1083
1084sub copy_list_with_digest {
1085 my ($list) = @_;
1086
1087 my $sha = Digest::SHA->new('sha1');
1088
1089 my $res = [];
1090 foreach my $entry (@$list) {
1091 my $data = {};
1092 foreach my $k (sort keys %$entry) {
1093 my $v = $entry->{$k};
0365eb68 1094 next if !defined($v);
5d38d64f 1095 $data->{$k} = $v;
6d9246e7 1096 # Note: digest ignores refs ($rule->{errors})
e83f0d00
DC		 1097 # since Digest::SHA expects a series of bytes,
1098 # we have to encode the value here to prevent errors when
1099 # using utf8 characters (eg. in comments)
1100 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
5d38d64f
DM		 1101 }
1102 push @$res, $data;
1103 }
1104
55e686c7 1105 my $digest = $sha->hexdigest;
5d38d64f
DM		 1106
1107 foreach my $entry (@$res) {
1108 $entry->{digest} = $digest;
1109 }
1110
1111 return wantarray ? ($res, $digest) : $res;
1112}
1113
e313afe0
DM		 1114our $cluster_option_properties = {
1115 enable => {
1116 description => "Enable or disable the firewall cluster wide.",
1117 type => 'integer',
1118 minimum => 0,
1119 optional => 1,
1120 },
1121 policy_in => {
1122 description => "Input policy.",
1123 type => 'string',
1124 optional => 1,
1125 enum => ['ACCEPT', 'REJECT', 'DROP'],
1126 },
1127 policy_out => {
1128 description => "Output policy.",
1129 type => 'string',
1130 optional => 1,
1131 enum => ['ACCEPT', 'REJECT', 'DROP'],
1132 },
1133};
1134
1135our $host_option_properties = {
1136 enable => {
1137 description => "Enable host firewall rules.",
1138 type => 'boolean',
1139 optional => 1,
1140 },
1141 log_level_in => get_standard_option('pve-fw-loglevel', {
1142 description => "Log level for incoming traffic." }),
1143 log_level_out => get_standard_option('pve-fw-loglevel', {
1144 description => "Log level for outgoing traffic." }),
1145 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1146 description => "Log level for illegal tcp flags filter." }),
1147 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1148 description => "Log level for SMURFS filter." }),
1149 nosmurfs => {
1150 description => "Enable SMURFS filter.",
1151 type => 'boolean',
1152 optional => 1,
1153 },
1154 tcpflags => {
1155 description => "Filter illegal combinations of TCP flags.",
1156 type => 'boolean',
1157 optional => 1,
1158 },
1159 nf_conntrack_max => {
1160 description => "Maximum number of tracked connections.",
1161 type => 'integer',
1162 optional => 1,
1163 minimum => 32768,
1164 },
1165 nf_conntrack_tcp_timeout_established => {
1166 description => "Conntrack established timeout.",
1167 type => 'integer',
1168 optional => 1,
1169 minimum => 7875,
1170 },
1171 ndp => {
1172 description => "Enable NDP.",
1173 type => 'boolean',
1174 optional => 1,
1175 },
1176};
1177
1178our $vm_option_properties = {
1179 enable => {
1180 description => "Enable/disable firewall rules.",
1181 type => 'boolean',
1182 optional => 1,
1183 },
1184 macfilter => {
1185 description => "Enable/disable MAC address filter.",
1186 type => 'boolean',
1187 optional => 1,
1188 },
1189 dhcp => {
1190 description => "Enable DHCP.",
1191 type => 'boolean',
1192 optional => 1,
1193 },
1194 ndp => {
1195 description => "Enable NDP.",
1196 type => 'boolean',
1197 optional => 1,
1198 },
1199 radv => {
1200 description => "Allow sending Router Advertisement.",
1201 type => 'boolean',
1202 optional => 1,
1203 },
1204 ipfilter => {
1205 description => "Enable default IP filters. " .
1206 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1207 "for every interface. Such ipsets implicitly contain sane default " .
1208 "restrictions such as restricting IPv6 link local addresses to " .
1209 "the one derived from the interface's MAC address. For containers " .
1210 "the configured IP addresses will be implicitly added.",
1211 type => 'boolean',
1212 optional => 1,
1213 },
1214 policy_in => {
1215 description => "Input policy.",
1216 type => 'string',
1217 optional => 1,
1218 enum => ['ACCEPT', 'REJECT', 'DROP'],
1219 },
1220 policy_out => {
1221 description => "Output policy.",
1222 type => 'string',
1223 optional => 1,
1224 enum => ['ACCEPT', 'REJECT', 'DROP'],
1225 },
1226 log_level_in => get_standard_option('pve-fw-loglevel', {
1227 description => "Log level for incoming traffic." }),
1228 log_level_out => get_standard_option('pve-fw-loglevel', {
1229 description => "Log level for outgoing traffic." }),
1230
1231};
1232
fb060a52 1233
7a332151 1234my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
fb060a52 1235
7a332151 1236my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
fb060a52 1237
9c7e0858
DM		 1238my $rule_properties = {
1239 pos => {
1240 description => "Update rule at position <pos>.",
1241 type => 'integer',
1242 minimum => 0,
1243 optional => 1,
1244 },
c71e785f 1245 digest => get_standard_option('pve-config-digest'),
9c7e0858 1246 type => {
e50429af 1247 description => "Rule type.",
9c7e0858
DM		 1248 type => 'string',
1249 optional => 1,
1250 enum => ['in', 'out', 'group'],
1251 },
1252 action => {
c14dacdf 1253 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
9c7e0858
DM		 1254 type => 'string',
1255 optional => 1,
44be8ceb 1256 pattern => $security_group_name_pattern,
c14dacdf
DM		 1257 maxLength => 20,
1258 minLength => 2,
9c7e0858 1259 },
e5076eee 1260 macro => {
e50429af 1261 description => "Use predefined standard macro.",
e5076eee
DM		 1262 type => 'string',
1263 optional => 1,
54cd19a8 1264 maxLength => 128,
e5076eee 1265 },
fb060a52 1266 iface => get_standard_option('pve-iface', {
7ccaa5f1 1267 description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
fb060a52
DM		 1268 optional => 1
1269 }),
9c7e0858 1270 source => {
fb060a52 1271 description => "Restrict packet source address. $addr_list_descr",
d31689ee 1272 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1273 optional => 1,
1274 },
1275 dest => {
fb060a52 1276 description => "Restrict packet destination address. $addr_list_descr",
d31689ee 1277 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1278 optional => 1,
1279 },
1280 proto => {
fb060a52 1281 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
54cd19a8 1282 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 1283 optional => 1,
1284 },
1285 enable => {
e50429af 1286 description => "Flag to enable/disable a rule.",
72d055fc
AG		 1287 type => 'integer',
1288 minimum => 0,
9c7e0858
DM		 1289 optional => 1,
1290 },
1291 sport => {
fb060a52 1292 description => "Restrict TCP/UDP source port. $port_descr",
a1c04f71 1293 type => 'string', format => 'pve-fw-sport-spec',
9c7e0858
DM		 1294 optional => 1,
1295 },
1296 dport => {
fb060a52 1297 description => "Restrict TCP/UDP destination port. $port_descr",
a1c04f71 1298 type => 'string', format => 'pve-fw-dport-spec',
9c7e0858
DM		 1299 optional => 1,
1300 },
1301 comment => {
e50429af 1302 description => "Descriptive comment.",
9c7e0858
DM		 1303 type => 'string',
1304 optional => 1,
1305 },
1306};
1307
1308sub add_rule_properties {
1309 my ($properties) = @_;
1310
1311 foreach my $k (keys %$rule_properties) {
3655b01f
DM		 1312 my $h = $rule_properties->{$k};
1313 # copy data, so that we can modify later without side effects
1314 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 1315 }
cbb5d6f3 1316
9c7e0858
DM		 1317 return $properties;
1318}
1319
5b7974df
DM		 1320sub delete_rule_properties {
1321 my ($rule, $delete_str) = @_;
e34d0e58 1322
5b7974df
DM		 1323 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1324 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1325 if !defined($rule_properties->{$opt});
1326 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1327 if $opt eq 'type' || $opt eq 'action';
1328 delete $rule->{$opt};
1329 }
1330
1331 return $rule;
1332}
1333
9a2745a0 1334my $apply_macro = sub {
35d1d6da 1335 my ($macro_name, $param, $verify, $ipversion) = @_;
9a2745a0
DM		 1336
1337 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1338 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1339
35d1d6da
DM		 1340 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1341 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1342 }
1343
21a18e53 1344 # skip macros which are specific to another ipversion
ff5d050e
AG		 1345 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1346 return if $ipversion != $required;
1347 }
21a18e53 1348
9a2745a0
DM		 1349 my $rules = [];
1350
1351 foreach my $templ (@$macro_rules) {
1352 my $rule = {};
1353 my $param_used = {};
1354 foreach my $k (keys %$templ) {
1355 my $v = $templ->{$k};
1356 if ($v eq 'PARAM') {
1357 $v = $param->{$k};
1358 $param_used->{$k} = 1;
1359 } elsif ($v eq 'DEST') {
1360 $v = $param->{dest};
1361 $param_used->{dest} = 1;
1362 } elsif ($v eq 'SOURCE') {
1363 $v = $param->{source};
1364 $param_used->{source} = 1;
1365 }
1366
1367 if (!defined($v)) {
1368 my $msg = "missing parameter '$k' in macro '$macro_name'";
e34d0e58 1369 raise_param_exc({ macro => $msg }) if $verify;
9a2745a0
DM		 1370 die "$msg\n";
1371 }
1372 $rule->{$k} = $v;
1373 }
1374 foreach my $k (keys %$param) {
1375 next if $k eq 'macro';
1376 next if !defined($param->{$k});
1377 next if $param_used->{$k};
1378 if (defined($rule->{$k})) {
1379 if ($rule->{$k} ne $param->{$k}) {
1380 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
e34d0e58 1381 raise_param_exc({ $k => $msg }) if $verify;
9a2745a0
DM		 1382 die "$msg\n";
1383 }
1384 } else {
1385 $rule->{$k} = $param->{$k};
1386 }
1387 }
1388 push @$rules, $rule;
1389 }
1390
1391 return $rules;
1392};
1393
b6b8e6ad
DM		 1394my $rule_env_iface_lookup = {
1395 'ct' => 1,
1396 'vm' => 1,
1397 'group' => 0,
1398 'cluster' => 1,
1399 'host' => 1,
1400};
1401
7ca36671 1402sub verify_rule {
a523e057 1403 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
b6b8e6ad
DM		 1404
1405 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
bfc488f6 1406
b6b8e6ad
DM		 1407 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1408 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
7ca36671 1409
a523e057
DM		 1410 my $errors = $rule->{errors} || {};
1411
6d9246e7 1412 my $error_count = 0;
7ca36671 1413
6d9246e7
DM		 1414 my $add_error = sub {
1415 my ($param, $msg) = @_;
d4cda423 1416 chomp $msg;
6d9246e7
DM		 1417 raise_param_exc({ $param => $msg }) if !$noerr;
1418 $error_count++;
1419 $errors->{$param} = $msg if !$errors->{$param};
1420 };
1421
eea9d2a1
DM		 1422 my $ipversion;
1423 my $set_ip_version = sub {
1424 my $vers = shift;
1425 if ($vers) {
1426 die "detected mixed ipv4/ipv6 adresses in rule\n"
1427 if $ipversion && ($vers != $ipversion);
1428 $ipversion = $vers;
1429 }
1430 };
1431
a523e057 1432 my $check_ipset_or_alias_property = sub {
ae029a88 1433 my ($name, $expected_ipversion) = @_;
a523e057
DM		 1434
1435 if (my $value = $rule->{$name}) {
1436 if ($value =~ m/^\+/) {
4dfe04e6 1437 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
bfc488f6 1438 &$add_error($name, "no such ipset '$1'")
a523e057 1439 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
bfc488f6 1440
a523e057 1441 } else {
351052d1 1442 &$add_error($name, "invalid ipset name '$value'");
a523e057
DM		 1443 }
1444 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1445 my $alias = lc($value);
bfc488f6 1446 &$add_error($name, "no such alias '$value'")
70e524eb 1447 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
04f5088f 1448 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
70e524eb
AD		 1449 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1450
eea9d2a1 1451 &$set_ip_version($e->{ipversion});
a523e057
DM		 1452 }
1453 }
1454 };
1455
6d9246e7
DM		 1456 my $type = $rule->{type};
1457 my $action = $rule->{action};
bfc488f6 1458
6d9246e7
DM		 1459 &$add_error('type', "missing property") if !$type;
1460 &$add_error('action', "missing property") if !$action;
1461
1462 if ($type) {
1463 if ($type eq 'in' || $type eq 'out') {
1464 &$add_error('action', "unknown action '$action'")
1465 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1466 } elsif ($type eq 'group') {
1467 &$add_error('type', "security groups not allowed")
1468 if !$allow_groups;
1469 &$add_error('action', "invalid characters in security group name")
1470 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1471 } else {
1472 &$add_error('type', "unknown rule type '$type'");
1473 }
7ca36671 1474 }
e34d0e58 1475
dba740a9 1476 if ($rule->{iface}) {
bfc488f6 1477 &$add_error('type', "parameter -i not allowed for this rule type")
b6b8e6ad 1478 if !$allow_iface;
dba740a9 1479 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
6d9246e7 1480 &$add_error('iface', $@) if $@;
fdefeeab 1481 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
b6b8e6ad
DM		 1482 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1483 if $rule->{iface} !~ m/^net(\d+)$/;
b6b8e6ad
DM		 1484 }
1485 }
7ca36671
DM		 1486
1487 if ($rule->{macro}) {
6d9246e7
DM		 1488 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1489 $rule->{macro} = $preferred_name;
1490 } else {
1491 &$add_error('macro', "unknown macro '$rule->{macro}'");
1492 }
1493 }
1494
1495 if ($rule->{proto}) {
1496 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1497 &$add_error('proto', $@) if $@;
041b9277
DM		 1498 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1499 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
6d9246e7 1500 }
7ca36671
DM		 1501
1502 if ($rule->{dport}) {
a1c04f71 1503 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
6d9246e7
DM		 1504 &$add_error('dport', $@) if $@;
1505 &$add_error('proto', "missing property - 'dport' requires this property")
914f9a50 1506 if !$rule->{proto};
6d9246e7 1507 }
7ca36671
DM		 1508
1509 if ($rule->{sport}) {
a1c04f71 1510 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
6d9246e7
DM		 1511 &$add_error('sport', $@) if $@;
1512 &$add_error('proto', "missing property - 'sport' requires this property")
914f9a50 1513 if !$rule->{proto};
7ca36671
DM		 1514 }
1515
1516 if ($rule->{source}) {
041b9277
DM		 1517 eval {
1518 my $source_ipversion = parse_address_list($rule->{source});
1519 &$set_ip_version($source_ipversion);
1520 };
6d9246e7 1521 &$add_error('source', $@) if $@;
ae029a88 1522 &$check_ipset_or_alias_property('source', $ipversion);
7ca36671
DM		 1523 }
1524
1525 if ($rule->{dest}) {
9e2205e5
DM		 1526 eval {
1527 my $dest_ipversion = parse_address_list($rule->{dest});
041b9277 1528 &$set_ip_version($dest_ipversion);
9e2205e5 1529 };
6d9246e7 1530 &$add_error('dest', $@) if $@;
ae029a88 1531 &$check_ipset_or_alias_property('dest', $ipversion);
7ca36671
DM		 1532 }
1533
35d1d6da
DM		 1534 $rule->{ipversion} = $ipversion if $ipversion;
1535
a523e057 1536 if ($rule->{macro} && !$error_count) {
35d1d6da 1537 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
6d9246e7
DM		 1538 if (my $err = $@) {
1539 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1540 my $eh = $err->{errors};
1541 foreach my $p (keys %$eh) {
1542 &$add_error($p, $eh->{$p});
1543 }
1544 } else {
1545 &$add_error('macro', "$err");
1546 }
1547 }
9a2745a0
DM		 1548 }
1549
6d9246e7
DM		 1550 $rule->{errors} = $errors if $error_count;
1551
7ca36671
DM		 1552 return $rule;
1553}
1554
9c7e0858
DM		 1555sub copy_rule_data {
1556 my ($rule, $param) = @_;
1557
1558 foreach my $k (keys %$rule_properties) {
1559 if (defined(my $v = $param->{$k})) {
1560 if ($v eq '' || $v eq '-') {
1561 delete $rule->{$k};
1562 } else {
1563 $rule->{$k} = $v;
1564 }
9c7e0858
DM		 1565 }
1566 }
7ca36671 1567
9c7e0858
DM		 1568 return $rule;
1569}
1570
9f6845cf
DM		 1571sub rules_modify_permissions {
1572 my ($rule_env) = @_;
1573
1574 if ($rule_env eq 'host') {
1575 return {
1576 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1577 };
1578 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1579 return {
1580 check => ['perm', '/', [ 'Sys.Modify' ]],
1581 };
3b4882dc 1582 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1583 return {
1584 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1585 }
1586 }
1587
1588 return undef;
1589}
1590
1591sub rules_audit_permissions {
1592 my ($rule_env) = @_;
1593
1594 if ($rule_env eq 'host') {
1595 return {
1596 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1597 };
1598 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1599 return {
1600 check => ['perm', '/', [ 'Sys.Audit' ]],
1601 };
3b4882dc 1602 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1603 return {
1604 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1605 }
1606 }
1607
1608 return undef;
1609}
1610
9c7e0858 1611# core functions
780bcc0f
DM		 1612my $bridge_firewall_enabled = 0;
1613
1614sub enable_bridge_firewall {
1615
1616 return if $bridge_firewall_enabled; # only once
1617
5f0a912c
DM		 1618 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1619 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1620
6a8a75db
DM		 1621 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1622 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1623
780bcc0f
DM		 1624 $bridge_firewall_enabled = 1;
1625}
1626
8cebfa6f 1627my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 1628
b16e818e
DM		 1629sub iptables_restore_cmdlist {
1630 my ($cmdlist) = @_;
3a616aa0 1631
59f9b456 1632 run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
3a616aa0
AD		 1633}
1634
17da5c0f
AD		 1635sub ip6tables_restore_cmdlist {
1636 my ($cmdlist) = @_;
1637
59f9b456 1638 run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
17da5c0f
AD		 1639}
1640
34cdedfa
AD		 1641sub ipset_restore_cmdlist {
1642 my ($cmdlist) = @_;
1643
ff5363da 1644 run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
34cdedfa
AD		 1645}
1646
de2a57cd 1647sub iptables_get_chains {
17da5c0f
AD		 1648 my ($iptablescmd) = @_;
1649
1650 $iptablescmd = "iptables" if !$iptablescmd;
de2a57cd
DM		 1651
1652 my $res = {};
1653
1654 # check what chains we want to track
1655 my $is_pvefw_chain = sub {
1656 my $name = shift;
1657
dec84fcd
DM		 1658 return 1 if $name =~ m/^PVEFW-\S+$/;
1659
a3ded5cd 1660 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
954f24b1 1661
a3ded5cd 1662 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
954f24b1 1663
a3ded5cd 1664 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
a89dfcc6 1665 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
de2a57cd
DM		 1666
1667 return undef;
1668 };
1669
1670 my $table = '';
1671
c4a2e5ae
DM		 1672 my $hooks = {};
1673
de2a57cd
DM		 1674 my $parser = sub {
1675 my $line = shift;
1676
1677 return if $line =~ m/^#/;
1678 return if $line =~ m/^\s*$/;
1679
1680 if ($line =~ m/^\*(\S+)$/) {
1681 $table = $1;
1682 return;
1683 }
1684
1685 return if $table ne 'filter';
1686
1687 if ($line =~ m/^:(\S+)\s/) {
1688 my $chain = $1;
1689 return if !&$is_pvefw_chain($chain);
3fa83edf 1690 $res->{$chain} = "unknown";
09d5f68e 1691 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1692 my ($chain, $sig) = ($1, $2);
de2a57cd 1693 return if !&$is_pvefw_chain($chain);
3fa83edf 1694 $res->{$chain} = $sig;
c4a2e5ae
DM		 1695 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1696 $hooks->{$1} = 1;
de2a57cd
DM		 1697 } else {
1698 # simply ignore the rest
1699 return;
1700 }
1701 };
1702
17da5c0f 1703 run_command("/sbin/$iptablescmd-save", outfunc => $parser);
de2a57cd 1704
c4a2e5ae 1705 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 1706}
1707
9bf7d929
DM		 1708sub iptables_chain_digest {
1709 my ($rules) = @_;
1710 my $digest = Digest::SHA->new('sha1');
1711 foreach my $rule (@$rules) { # order is important
1712 $digest->add($rule);
1713 }
1714 return $digest->b64digest;
1715}
1716
3f95d14a
DM		 1717sub ipset_chain_digest {
1718 my ($rules) = @_;
4bd0a9c4 1719
3f95d14a
DM		 1720 my $digest = Digest::SHA->new('sha1');
1721 foreach my $rule (sort @$rules) { # note: sorted
1722 $digest->add($rule);
1723 }
1724 return $digest->b64digest;
1725}
1726
34cdedfa
AD		 1727sub ipset_get_chains {
1728
1729 my $res = {};
1730 my $chains = {};
1731
1732 my $parser = sub {
1733 my $line = shift;
1734
1735 return if $line =~ m/^#/;
1736 return if $line =~ m/^\s*$/;
4b96e877 1737 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
DM		 1738 my $chain = $1;
1739 $line =~ s/\s+$//; # delete trailing white space
1740 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 1741 } else {
1742 # simply ignore the rest
1743 return;
1744 }
1745 };
1746
ff5363da 1747 run_command("/sbin/ipset save", outfunc => $parser);
34cdedfa 1748
3f95d14a
DM		 1749 # compute digest for each chain
1750 foreach my $chain (keys %$chains) {
1751 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 1752 }
1753
1754 return $res;
1755}
1756
eba0fb64 1757sub ruleset_generate_cmdstr {
88c26d5e 1758 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
3a616aa0 1759
00bb4391 1760 return if defined($rule->{enable}) && !$rule->{enable};
6d9246e7 1761 return if $rule->{errors};
11bac5c2 1762
e5076eee
DM		 1763 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1764
a1c04f71
WB		 1765 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1766 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
e5076eee 1767
41524a58 1768 my @cmd = ();
3a616aa0 1769
eba0fb64
DM		 1770 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1771 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1772
ba791b1f
AD		 1773 my $source = $rule->{source};
1774 my $dest = $rule->{dest};
1775
cbb5d6f3 1776 if ($source) {
44be8ceb 1777 if ($source =~ m/^\+/) {
4dfe04e6 1778 if ($source =~ m/^\+(${ipset_name_pattern})$/) {
e523d2bb
DM		 1779 my $name = $1;
1780 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
88c26d5e 1781 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
708ba714 1782 push @cmd, "-m set --match-set ${ipset_chain} src";
e523d2bb 1783 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
88c26d5e 1784 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
708ba714 1785 push @cmd, "-m set --match-set ${ipset_chain} src";
e523d2bb
DM		 1786 } else {
1787 die "no such ipset '$name'\n";
1788 }
44be8ceb
DM		 1789 } else {
1790 die "invalid security group name '$source'\n";
1791 }
1792 } elsif ($source =~ m/^${ip_alias_pattern}$/){
81d574a7 1793 my $alias = lc($source);
04f5088f 1794 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
e523d2bb
DM		 1795 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1796 die "no such alias '$source'\n" if !$e;
81d574a7 1797 push @cmd, "-s $e->{cidr}";
ac8242cc 1798 } elsif ($source =~ m/\-/){
ba791b1f 1799 push @cmd, "-m iprange --src-range $source";
cbb5d6f3 1800 } else {
ba791b1f
AD		 1801 push @cmd, "-s $source";
1802 }
1803 }
1804
cbb5d6f3 1805 if ($dest) {
44be8ceb 1806 if ($dest =~ m/^\+/) {
4dfe04e6 1807 if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
e523d2bb
DM		 1808 my $name = $1;
1809 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
88c26d5e 1810 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
ac4580a0 1811 push @cmd, "-m set --match-set ${ipset_chain} dst";
e523d2bb 1812 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
88c26d5e 1813 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
708ba714 1814 push @cmd, "-m set --match-set ${ipset_chain} dst";
e523d2bb
DM		 1815 } else {
1816 die "no such ipset '$name'\n";
1817 }
44be8ceb
DM		 1818 } else {
1819 die "invalid security group name '$dest'\n";
1820 }
1821 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
51b40846 1822 my $alias = lc($dest);
04f5088f 1823 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
e523d2bb
DM		 1824 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1825 die "no such alias '$dest'\n" if !$e;
81d574a7 1826 push @cmd, "-d $e->{cidr}";
cbb5d6f3 1827 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
ba791b1f 1828 push @cmd, "-m iprange --dst-range $dest";
cbb5d6f3 1829 } else {
d6d2a385 1830 push @cmd, "-d $dest";
ba791b1f
AD		 1831 }
1832 }
4b586518 1833
95e35949
WB		 1834 if (my $proto = $rule->{proto}) {
1835 push @cmd, "-p $proto";
e3a1d391 1836
181390b0 1837 my $multiport = 0;
e5076eee
DM		 1838 $multiport++ if $nbdport > 1;
1839 $multiport++ if $nbsport > 1;
e3a1d391 1840
41524a58 1841 push @cmd, "--match multiport" if $multiport;
4b586518 1842
cbb5d6f3 1843 die "multiport: option '--sports' cannot be used together with '--dports'\n"
181390b0
DM		 1844 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1845
1846 if ($rule->{dport}) {
95e35949 1847 if ($proto eq 'icmp') {
181390b0 1848 # Note: we use dport to store --icmp-type
9bd7a4b3
WB		 1849 die "unknown icmp-type '$rule->{dport}'\n"
1850 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
41524a58 1851 push @cmd, "-m icmp --icmp-type $rule->{dport}";
95e35949 1852 } elsif ($proto eq 'icmpv6') {
041b9277 1853 # Note: we use dport to store --icmpv6-type
9bd7a4b3
WB		 1854 die "unknown icmpv6-type '$rule->{dport}'\n"
1855 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
041b9277 1856 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
181390b0 1857 } else {
e5076eee 1858 if ($nbdport > 1) {
181390b0 1859 if ($multiport == 2) {
41524a58 1860 push @cmd, "--ports $rule->{dport}";
181390b0 1861 } else {
41524a58 1862 push @cmd, "--dports $rule->{dport}";
181390b0 1863 }
e3a1d391 1864 } else {
41524a58 1865 push @cmd, "--dport $rule->{dport}";
e3a1d391 1866 }
4b586518
DM		 1867 }
1868 }
4b586518 1869
181390b0 1870 if ($rule->{sport}) {
e5076eee 1871 if ($nbsport > 1) {
41524a58 1872 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 1873 } else {
41524a58 1874 push @cmd, "--sport $rule->{sport}";
181390b0 1875 }
4b586518 1876 }
181390b0 1877 } elsif ($rule->{dport} || $rule->{sport}) {
93d96f83
DM		 1878 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1879 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
4b586518
DM		 1880 }
1881
41524a58 1882 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 1883
1884 if (my $action = $rule->{action}) {
cbb5d6f3 1885 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 1886 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 1887 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 1888 }
3a616aa0 1889
eba0fb64
DM		 1890 return scalar(@cmd) ? join(' ', @cmd) : undef;
1891}
1892
1893sub ruleset_generate_rule {
88c26d5e 1894 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
eba0fb64 1895
e5076eee
DM		 1896 my $rules;
1897
1898 if ($rule->{macro}) {
35d1d6da 1899 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
e5076eee
DM		 1900 } else {
1901 $rules = [ $rule ];
1902 }
1903
d4091b82
DM		 1904 # update all or nothing
1905
1906 my @cmds = ();
cbb5d6f3 1907 foreach my $tmp (@$rules) {
88c26d5e 1908 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
d4091b82 1909 push @cmds, $cmdstr;
e5076eee 1910 }
41524a58 1911 }
d4091b82
DM		 1912
1913 foreach my $cmdstr (@cmds) {
1914 ruleset_addrule($ruleset, $chain, $cmdstr);
1915 }
3fa83edf 1916}
0f168d7b 1917
eba0fb64 1918sub ruleset_generate_rule_insert {
88c26d5e 1919 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
eba0fb64 1920
e5076eee
DM		 1921 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1922
88c26d5e 1923 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
eba0fb64
DM		 1924 ruleset_insertrule($ruleset, $chain, $cmdstr);
1925 }
1926}
3fa83edf
DM		 1927
1928sub ruleset_create_chain {
1929 my ($ruleset, $chain) = @_;
3a616aa0 1930
d050c724 1931 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1932 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1933
3fa83edf
DM		 1934 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1935
1936 $ruleset->{$chain} = [];
3a616aa0
AD		 1937}
1938
3fa83edf
DM		 1939sub ruleset_chain_exist {
1940 my ($ruleset, $chain) = @_;
3a616aa0 1941
3fa83edf
DM		 1942 return $ruleset->{$chain} ? 1 : undef;
1943}
3a616aa0 1944
3fa83edf
DM		 1945sub ruleset_addrule {
1946 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1947
3fa83edf 1948 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1949
3fa83edf
DM		 1950 push @{$ruleset->{$chain}}, "-A $chain $rule";
1951}
3a616aa0 1952
3fa83edf
DM		 1953sub ruleset_insertrule {
1954 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1955
3fa83edf 1956 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1957
3fa83edf
DM		 1958 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1959}
3a616aa0 1960
782c4cde
DM		 1961sub get_log_rule_base {
1962 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 1963
782c4cde
DM		 1964 die "internal error - no log level" if !defined($loglevel);
1965
1966 $vmid = 0 if !defined($vmid);
1967
cbb5d6f3 1968 # Note: we use special format for prefix to pass further
782c4cde
DM		 1969 # info to log daemon (VMID, LOGVELEL and CHAIN)
1970
1971 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1972}
1973
1974sub ruleset_addlog {
1975 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1976
1977 return if !defined($loglevel);
1978
1979 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1980
1981 $logrule = "$rule $logrule" if defined($rule);
1982
88733a74 1983 ruleset_addrule($ruleset, $chain, $logrule);
782c4cde
DM		 1984}
1985
ead850e8 1986sub ruleset_add_chain_policy {
88c26d5e 1987 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 1988
1989 if ($policy eq 'ACCEPT') {
1990
88c26d5e 1991 ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
ead850e8
DM		 1992 { ACCEPT => $accept_action});
1993
1994 } elsif ($policy eq 'DROP') {
1995
1996 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1997
782c4cde 1998 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1999
2000 ruleset_addrule($ruleset, $chain, "-j DROP");
2001 } elsif ($policy eq 'REJECT') {
2002 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
2003
782c4cde 2004 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 2005
2006 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2007 } else {
2008 # should not happen
2009 die "internal error: unknown policy '$policy'";
2010 }
2011}
2012
a83abe93 2013sub ruleset_chain_add_ndp {
e8415920 2014 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
a83abe93
WB		 2015 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2016
e8415920 2017 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
d7aa51ac 2018 if ($direction ne 'OUT' || $options->{radv}) {
e8415920 2019 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
d7aa51ac 2020 }
e8415920
WB		 2021 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2022 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
a83abe93
WB		 2023}
2024
e2943485
DM		 2025sub ruleset_chain_add_conn_filters {
2026 my ($ruleset, $chain, $accept) = @_;
2027
2028 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2029 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2030}
2031
2032sub ruleset_chain_add_input_filters {
88c26d5e 2033 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2428e394
AD		 2034
2035 if ($cluster_conf->{ipset}->{blacklist}){
b5831a0d
AD		 2036 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2037 ruleset_create_chain($ruleset, "PVEFW-blacklist");
2038 ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2039 ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2040 }
88c26d5e 2041 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
708ba714 2042 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2428e394 2043 }
e2943485
DM		 2044
2045 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
5b5c42b1
DM		 2046 if ($ipversion == 4) {
2047 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2048 }
e2943485
DM		 2049 }
2050
2051 if ($options->{tcpflags}) {
2052 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2053 }
2054}
2055
9e15114a 2056sub ruleset_create_vm_chain {
88c26d5e 2057 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
3a616aa0 2058
9e15114a 2059 ruleset_create_chain($ruleset, $chain);
b47ecc88 2060 my $accept = generate_nfqueue($options);
3a616aa0 2061
ce15d90b 2062 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
dcafc5fb
WB		 2063 if ($ipversion == 4) {
2064 if ($direction eq 'OUT') {
2065 ruleset_generate_rule($ruleset, $chain, $ipversion,
2066 { action => 'PVEFW-SET-ACCEPT-MARK',
2067 proto => 'udp', sport => 68, dport => 67 });
2068 } else {
2069 ruleset_generate_rule($ruleset, $chain, $ipversion,
2070 { action => 'ACCEPT',
2071 proto => 'udp', sport => 67, dport => 68 });
2072 }
2073 } elsif ($ipversion == 6) {
2074 if ($direction eq 'OUT') {
2075 ruleset_generate_rule($ruleset, $chain, $ipversion,
2076 { action => 'PVEFW-SET-ACCEPT-MARK',
2077 proto => 'udp', sport => 546, dport => 547 });
2078 } else {
2079 ruleset_generate_rule($ruleset, $chain, $ipversion,
2080 { action => 'ACCEPT',
2081 proto => 'udp', sport => 547, dport => 546 });
2082 }
76a2d1e7 2083 }
dcafc5fb 2084
ce15d90b
DM		 2085 }
2086
b21aca2c
DM		 2087 if ($direction eq 'OUT') {
2088 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 2089 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 2090 }
d7aa51ac
WB		 2091 if ($ipversion == 6 && !$options->{radv}) {
2092 ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2093 }
808d711d
DM		 2094 if ($ipfilter_ipset) {
2095 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2096 }
fe3d79b4 2097 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
c29f55c9 2098 }
e8415920
WB		 2099
2100 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2101 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
9e15114a
DM		 2102}
2103
4bc6b5ac 2104sub ruleset_add_group_rule {
aedde2c2 2105 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
4bc6b5ac
DM		 2106
2107 my $group = $rule->{action};
2108 my $group_chain = "GROUP-$group-$direction";
2109 if(!ruleset_chain_exist($ruleset, $group_chain)){
aedde2c2 2110 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
4bc6b5ac 2111 }
bfc488f6 2112
f8b12fff
DM		 2113 if ($direction eq 'OUT' && $rule->{iface_out}) {
2114 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2115 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2116 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
4bc6b5ac
DM		 2117 } else {
2118 ruleset_addrule($ruleset, $chain, "-j $group_chain");
2119 }
2120
fe3d79b4 2121 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
4bc6b5ac
DM		 2122}
2123
9e15114a 2124sub ruleset_generate_vm_rules {
84870b1a 2125 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
9e15114a
DM		 2126
2127 my $lc_direction = lc($direction);
c29f55c9 2128
6b8ca015
DM		 2129 my $in_accept = generate_nfqueue($options);
2130
92e976b3
DM		 2131 foreach my $rule (@$rules) {
2132 next if $rule->{iface} && $rule->{iface} ne $netid;
b7ab6989 2133 next if !$rule->{enable} || $rule->{errors};
006490cb 2134 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
84870b1a 2135
92e976b3 2136 if ($rule->{type} eq 'group') {
4bc6b5ac 2137 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
aedde2c2 2138 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
92e976b3
DM		 2139 } else {
2140 next if $rule->{type} ne $lc_direction;
921dfb33
DM		 2141 eval {
2142 if ($direction eq 'OUT') {
88c26d5e 2143 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
e34d0e58 2144 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
e523d2bb 2145 undef, $cluster_conf, $vmfw_conf);
921dfb33 2146 } else {
88c26d5e 2147 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
e34d0e58 2148 { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
e523d2bb 2149 undef, $cluster_conf, $vmfw_conf);
921dfb33
DM		 2150 }
2151 };
2152 warn $@ if $@;
4e6112f9 2153 }
3a616aa0 2154 }
9e15114a
DM		 2155}
2156
b47ecc88
AD		 2157sub generate_nfqueue {
2158 my ($options) = @_;
2159
73089769
DM		 2160 if ($options->{ips}) {
2161 my $action = "NFQUEUE";
2162 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2163 if (defined($3) && defined($1)) {
b47ecc88 2164 $action .= " --queue-balance $1:$3";
73089769 2165 } elsif (defined($1)) {
b47ecc88
AD		 2166 $action .= " --queue-num $1";
2167 }
2168 }
8dc92812 2169 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
73089769
DM		 2170 return $action;
2171 } else {
2172 return "ACCEPT";
b47ecc88 2173 }
b47ecc88
AD		 2174}
2175
da6fc60b 2176sub ruleset_generate_vm_ipsrules {
a01c32c7 2177 my ($ruleset, $options, $direction, $iface) = @_;
da6fc60b
AD		 2178
2179 if ($options->{ips} && $direction eq 'IN') {
2180 my $nfqueue = generate_nfqueue($options);
2181
a01c32c7 2182 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
da6fc60b
AD		 2183 ruleset_create_chain($ruleset, "PVEFW-IPS");
2184 }
2185
a01c32c7 2186 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
da6fc60b
AD		 2187 }
2188}
2189
9e15114a 2190sub generate_tap_rules_direction {
84870b1a 2191 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
9e15114a
DM		 2192
2193 my $lc_direction = lc($direction);
2194
2195 my $rules = $vmfw_conf->{rules};
2196
2197 my $options = $vmfw_conf->{options};
2198 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2199
2200 my $tapchain = "$iface-$direction";
2201
b692f42c 2202 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
88c26d5e 2203 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
74601077 2204 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
808d711d 2205
a34cfdd0 2206 # create chain with mac and ip filter
88c26d5e 2207 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
9e15114a 2208
a34cfdd0 2209 if ($options->{enable}) {
84870b1a 2210 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
3a616aa0 2211
a34cfdd0 2212 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
da6fc60b 2213
a34cfdd0
DM		 2214 # implement policy
2215 my $policy;
ccae0b50 2216
a34cfdd0
DM		 2217 if ($direction eq 'OUT') {
2218 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2219 } else {
72f63fde 2220 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
a34cfdd0 2221 }
ccae0b50 2222
a34cfdd0
DM		 2223 my $accept = generate_nfqueue($options);
2224 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
88c26d5e 2225 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
a34cfdd0
DM		 2226 } else {
2227 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
88c26d5e 2228 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
a34cfdd0 2229 }
3a616aa0 2230
3fa83edf 2231 # plug the tap chain to bridge chain
3cc81077 2232 if ($direction eq 'IN') {
a01c32c7
DM		 2233 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2234 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
3cc81077 2235 } else {
a01c32c7
DM		 2236 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2237 "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
3cc81077 2238 }
3a616aa0
AD		 2239}
2240
d18c1e2b 2241sub enable_host_firewall {
aedde2c2 2242 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
0bd5f137 2243
92e976b3 2244 my $options = $hostfw_conf->{options};
63324b09 2245 my $cluster_options = $cluster_conf->{options};
92e976b3 2246 my $rules = $hostfw_conf->{rules};
35f0c37e 2247 my $cluster_rules = $cluster_conf->{rules};
178a63be 2248
3fa83edf 2249 # host inbound firewall
dec84fcd
DM		 2250 my $chain = "PVEFW-HOST-IN";
2251 ruleset_create_chain($ruleset, $chain);
0bd5f137 2252
178a63be
DM		 2253 my $loglevel = get_option_log_level($options, "log_level_in");
2254
e2943485 2255 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
4ac863a6 2256
e2943485 2257 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
e8415920 2258 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
88c26d5e 2259 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
fb424a00 2260
23e888f8
DM		 2261 # we use RETURN because we need to check also tap rules
2262 my $accept_action = 'RETURN';
2263
cc8dc02f
DM		 2264 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2265
35f0c37e
DM		 2266 # add host rules first, so that cluster wide rules can be overwritten
2267 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2268 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2269 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
bfc488f6 2270
f8b12fff 2271 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
5383df39 2272
1a9978ed
DM		 2273 eval {
2274 if ($rule->{type} eq 'group') {
aedde2c2 2275 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
1a9978ed 2276 } elsif ($rule->{type} eq 'in') {
88c26d5e
DM		 2277 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2278 { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
e523d2bb 2279 undef, $cluster_conf, $hostfw_conf);
1a9978ed
DM		 2280 }
2281 };
2282 warn $@ if $@;
f8b12fff 2283 delete $rule->{iface_in};
0bd5f137 2284 }
eb399cef
DM		 2285
2286 # allow standard traffic for management ipset (includes cluster network)
88c26d5e 2287 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
708ba714 2288 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
eb399cef 2289 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action"); # PVE API
bfc488f6 2290 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
eb399cef
DM		 2291 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
2292 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action"); # SSH
bfc488f6 2293
afcd29b3
DM		 2294 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2295 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
3bc79f87 2296
eb399cef 2297 # corosync
35d1d6da 2298 if ($localnet && ($ipversion == $localnet_ver)) {
c5191f57 2299 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
525778d7
DM		 2300 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2301 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
3bc79f87 2302 }
0bd5f137 2303
23e888f8 2304 # implement input policy
63324b09 2305 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
88c26d5e 2306 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
0bd5f137 2307
3fa83edf 2308 # host outbound firewall
aadd745e 2309 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 2310 ruleset_create_chain($ruleset, $chain);
2311
178a63be
DM		 2312 $loglevel = get_option_log_level($options, "log_level_out");
2313
dec84fcd 2314 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
e2943485
DM		 2315
2316 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2317
23e888f8
DM		 2318 # we use RETURN because we may want to check other thigs later
2319 $accept_action = 'RETURN';
e8415920 2320 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
23e888f8 2321
cc8dc02f
DM		 2322 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2323
35f0c37e
DM		 2324 # add host rules first, so that cluster wide rules can be overwritten
2325 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2326 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2327 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
5383df39 2328
f8b12fff 2329 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1a9978ed
DM		 2330 eval {
2331 if ($rule->{type} eq 'group') {
aedde2c2 2332 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
1a9978ed 2333 } elsif ($rule->{type} eq 'out') {
88c26d5e
DM		 2334 ruleset_generate_rule($ruleset, $chain, $ipversion,
2335 $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
e523d2bb 2336 undef, $cluster_conf, $hostfw_conf);
1a9978ed
DM		 2337 }
2338 };
2339 warn $@ if $@;
f8b12fff 2340 delete $rule->{iface_out};
0bd5f137
AD		 2341 }
2342
3bc79f87 2343 # allow standard traffic on cluster network
35d1d6da 2344 if ($localnet && ($ipversion == $localnet_ver)) {
525778d7
DM		 2345 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action"); # PVE API
2346 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action"); # SSH
bfc488f6 2347 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
525778d7 2348 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
bfc488f6 2349
c5191f57 2350 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
525778d7 2351 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
f573ae2c 2352 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
3bc79f87
DM		 2353 }
2354
23e888f8 2355 # implement output policy
63324b09 2356 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
88c26d5e 2357 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
6158271d 2358
dec84fcd
DM		 2359 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2360 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 2361}
2362
2363sub generate_group_rules {
aedde2c2 2364 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
9d31b418 2365
c6f5cc88 2366 my $rules = $cluster_conf->{groups}->{$group};
6158271d 2367
b4deedab
DM		 2368 if (!$rules) {
2369 warn "no such security group '$group'\n";
2370 $rules = []; # create empty chain
2371 }
2372
3fa83edf 2373 my $chain = "GROUP-${group}-IN";
9d31b418 2374
3fa83edf 2375 ruleset_create_chain($ruleset, $chain);
fe3d79b4 2376 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2377
92e976b3
DM		 2378 foreach my $rule (@$rules) {
2379 next if $rule->{type} ne 'in';
aedde2c2 2380 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
88c26d5e
DM		 2381 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2382 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2383 undef, $cluster_conf);
9d31b418
AD		 2384 }
2385
3fa83edf 2386 $chain = "GROUP-${group}-OUT";
9d31b418 2387
3fa83edf 2388 ruleset_create_chain($ruleset, $chain);
fe3d79b4 2389 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2390
92e976b3
DM		 2391 foreach my $rule (@$rules) {
2392 next if $rule->{type} ne 'out';
aedde2c2 2393 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
92e976b3
DM		 2394 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2395 # check also other tap rules later
88c26d5e
DM		 2396 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2397 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2398 undef, $cluster_conf);
9d31b418 2399 }
9d31b418
AD		 2400}
2401
51bae274
DM		 2402my $MAX_NETS = 32;
2403my $valid_netdev_names = {};
2404for (my $i = 0; $i < $MAX_NETS; $i++) {
2405 $valid_netdev_names->{"net$i"} = 1;
2406}
5e1267a5 2407
fe3d79b4
WB		 2408sub get_mark_values {
2409 my ($value, $mask) = @_;
2410 $value = hex($value) if $value =~ /^0x/;
2411 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2412 $mask = 0xffffffff if !defined($mask);
2413 return ($value, $mask);
2414}
2415
51bae274 2416sub parse_fw_rule {
a523e057 2417 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
5e1267a5 2418
d4cda423
DM		 2419 my $orig_line = $line;
2420
6d9246e7
DM		 2421 my $rule = {};
2422
11bac5c2 2423 # we can add single line comments to the end of the rule
6d9246e7
DM		 2424 if ($line =~ s/#\s*(.*?)\s*$//) {
2425 $rule->{comment} = decode('utf8', $1);
2426 }
11bac5c2
DM		 2427
2428 # we can disable a rule when prefixed with '|'
ea9e5116 2429
6d9246e7 2430 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
51bae274 2431
dba740a9
DM		 2432 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2433 die "unable to parse rule: $line\n";
6d9246e7
DM		 2434
2435 $rule->{type} = lc($1);
2436 $rule->{action} = $2;
2437
2438 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2439 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2440 $rule->{macro} = $1;
2441 $rule->{action} = $2;
92e976b3 2442 }
51bae274
DM		 2443 }
2444
dba740a9
DM		 2445 while (length($line)) {
2446 if ($line =~ s/^-i (\S+)\s*//) {
6d9246e7 2447 $rule->{iface} = $1;
dba740a9
DM		 2448 next;
2449 }
51bae274 2450
6d9246e7 2451 last if $rule->{type} eq 'group';
51bae274 2452
dba740a9 2453 if ($line =~ s/^-p (\S+)\s*//) {
6d9246e7 2454 $rule->{proto} = $1;
dba740a9
DM		 2455 next;
2456 }
6d9246e7 2457
dba740a9 2458 if ($line =~ s/^-dport (\S+)\s*//) {
6d9246e7 2459 $rule->{dport} = $1;
dba740a9
DM		 2460 next;
2461 }
6d9246e7 2462
dba740a9 2463 if ($line =~ s/^-sport (\S+)\s*//) {
6d9246e7 2464 $rule->{sport} = $1;
dba740a9
DM		 2465 next;
2466 }
2467 if ($line =~ s/^-source (\S+)\s*//) {
6d9246e7 2468 $rule->{source} = $1;
dba740a9
DM		 2469 next;
2470 }
2471 if ($line =~ s/^-dest (\S+)\s*//) {
6d9246e7 2472 $rule->{dest} = $1;
dba740a9
DM		 2473 next;
2474 }
51bae274 2475
dba740a9
DM		 2476 last;
2477 }
ba791b1f 2478
dba740a9 2479 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 2480
a523e057 2481 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
d4cda423
DM		 2482 if ($verbose && $rule->{errors}) {
2483 warn "$prefix - errors in rule parameters: $orig_line\n";
2484 foreach my $p (keys %{$rule->{errors}}) {
2485 warn " $p: $rule->{errors}->{$p}\n";
2486 }
2487 }
6d9246e7
DM		 2488
2489 return $rule;
51bae274
DM		 2490}
2491
2d404ffc 2492sub parse_vmfw_option {
85c6eaed
DM		 2493 my ($line) = @_;
2494
2495 my ($opt, $value);
2496
178a63be
DM		 2497 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2498
74601077 2499 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 2500 $opt = lc($1);
2501 $value = int($2);
178a63be
DM		 2502 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2503 $opt = lc($1);
2504 $value = $2 ? lc($3) : '';
72f63fde 2505 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 2506 $opt = lc($1);
2507 $value = uc($3);
b47ecc88
AD		 2508 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2509 $opt = lc($1);
2510 $value = $2;
9c6b6efd 2511 } else {
85c6eaed
DM		 2512 die "can't parse option '$line'\n"
2513 }
2514
2515 return ($opt, $value);
2516}
2517
2d404ffc
DM		 2518sub parse_hostfw_option {
2519 my ($line) = @_;
2520
2521 my ($opt, $value);
2522
2523 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2524
a83abe93 2525 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2d404ffc
DM		 2526 $opt = lc($1);
2527 $value = int($2);
178a63be 2528 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 2529 $opt = lc($1);
2530 $value = $2 ? lc($3) : '';
28c082a1 2531 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 2532 $opt = lc($1);
2533 $value = int($2);
2d404ffc 2534 } else {
2d404ffc
DM		 2535 die "can't parse option '$line'\n"
2536 }
2537
2538 return ($opt, $value);
2539}
2540
c6f5cc88
DM		 2541sub parse_clusterfw_option {
2542 my ($line) = @_;
2543
2544 my ($opt, $value);
2545
72d055fc 2546 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
c6f5cc88
DM		 2547 $opt = lc($1);
2548 $value = int($2);
72d055fc
AG		 2549 if (($value > 1) && ((time() - $value) > 60)) {
2550 $value = 0
2551 }
63324b09
DM		 2552 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2553 $opt = lc($1);
2554 $value = uc($3);
c6f5cc88 2555 } else {
c6f5cc88
DM		 2556 die "can't parse option '$line'\n"
2557 }
2558
2559 return ($opt, $value);
2560}
2561
6c221576
DM		 2562sub resolve_alias {
2563 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2564
6d959e3f 2565 my $alias = lc($cidr);
04f5088f 2566 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
6d959e3f 2567 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
6c221576 2568
6d959e3f
DM		 2569 die "no such alias '$cidr'\n" if !$e;;
2570
2571 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
6c221576
DM		 2572}
2573
ae029a88
DM		 2574sub parse_ip_or_cidr {
2575 my ($cidr) = @_;
2576
2577 my $ipversion;
2578
2579 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2580 $cidr =~ s|/128$||;
2581 $ipversion = 6;
2582 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2583 $cidr =~ s|/32$||;
2584 $ipversion = 4;
2585 } else {
2586 die "value does not look like a valid IP address or CIDR network\n";
2587 }
2588
2589 return wantarray ? ($cidr, $ipversion) : $cidr;
2590}
2591
e76a9f53 2592sub parse_alias {
92e1209b
AD		 2593 my ($line) = @_;
2594
81d574a7
DM		 2595 # we can add single line comments to the end of the line
2596 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2597
92e1209b 2598 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7 2599 my ($name, $cidr) = ($1, $2);
ae029a88
DM		 2600 my $ipversion;
2601
2602 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2603
81d574a7
DM		 2604 my $data = {
2605 name => $name,
2606 cidr => $cidr,
70e524eb 2607 ipversion => $ipversion,
81d574a7
DM		 2608 };
2609 $data->{comment} = $comment if $comment;
2610 return $data;
92e1209b
AD		 2611 }
2612
81d574a7 2613 return undef;
92e1209b
AD		 2614}
2615
e5cd1ee0 2616sub generic_fw_config_parser {
1210ae94 2617 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
5e1267a5 2618
51bae274
DM		 2619 my $section;
2620 my $group;
2621
1210ae94 2622 my $res = $empty_conf;
6158271d 2623
51bae274
DM		 2624 while (defined(my $line = <$fh>)) {
2625 next if $line =~ m/^#/;
2626 next if $line =~ m/^\s*$/;
2627
c8c534f7
DM		 2628 chomp $line;
2629
961b4928
DM		 2630 my $linenr = $fh->input_line_number();
2631 my $prefix = "$filename (line $linenr)";
2632
1210ae94 2633 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
c6f5cc88
DM		 2634 $section = 'options';
2635 next;
2636 }
2637
1210ae94 2638 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
92e1209b
AD		 2639 $section = 'aliases';
2640 next;
2641 }
2642
1210ae94 2643 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
c6f5cc88 2644 $section = 'groups';
92e976b3 2645 $group = lc($1);
0d22acb3 2646 my $comment = $2;
351052d1
DM		 2647 eval {
2648 die "security group name too long\n" if length($group) > $max_group_name_length;
2649 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2650 };
2651 if (my $err = $@) {
2652 ($section, $group, $comment) = undef;
2653 warn "$prefix: $err";
2654 next;
2655 }
2656
c85c87f9 2657 $res->{$section}->{$group} = [];
649e4d57
DM		 2658 $res->{group_comments}->{$group} = decode('utf8', $comment)
2659 if $comment;
51bae274
DM		 2660 next;
2661 }
34cdedfa 2662
1210ae94 2663 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
c6f5cc88
DM		 2664 $section = 'rules';
2665 next;
2666 }
cbb5d6f3 2667
1210ae94 2668 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
34cdedfa
AD		 2669 $section = 'ipset';
2670 $group = lc($1);
d72c631c 2671 my $comment = $2;
351052d1
DM		 2672 eval {
2673 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2674 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2675 };
2676 if (my $err = $@) {
2677 ($section, $group, $comment) = undef;
2678 warn "$prefix: $err";
2679 next;
2680 }
2681
c85c87f9 2682 $res->{$section}->{$group} = [];
e34d0e58 2683 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2684 if $comment;
34cdedfa
AD		 2685 next;
2686 }
2687
c6f5cc88 2688 if (!$section) {
cbb5d6f3 2689 warn "$prefix: skip line - no section\n";
51bae274
DM		 2690 next;
2691 }
2692
c6f5cc88
DM		 2693 if ($section eq 'options') {
2694 eval {
1210ae94
DM		 2695 my ($opt, $value);
2696 if ($rule_env eq 'cluster') {
2697 ($opt, $value) = parse_clusterfw_option($line);
2698 } elsif ($rule_env eq 'host') {
2699 ($opt, $value) = parse_hostfw_option($line);
2700 } else {
2701 ($opt, $value) = parse_vmfw_option($line);
2702 }
c6f5cc88
DM		 2703 $res->{options}->{$opt} = $value;
2704 };
2705 warn "$prefix: $@" if $@;
92e1209b
AD		 2706 } elsif ($section eq 'aliases') {
2707 eval {
e76a9f53 2708 my $data = parse_alias($line);
81d574a7 2709 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2710 };
2711 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2712 } elsif ($section eq 'rules') {
2713 my $rule;
1210ae94 2714 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
c6f5cc88
DM		 2715 if (my $err = $@) {
2716 warn "$prefix: $err";
2717 next;
2718 }
2719 push @{$res->{$section}}, $rule;
2720 } elsif ($section eq 'groups') {
34cdedfa 2721 my $rule;
1210ae94 2722 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
34cdedfa
AD		 2723 if (my $err = $@) {
2724 warn "$prefix: $err";
2725 next;
2726 }
3f95d14a 2727 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2728 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2729 # we can add single line comments to the end of the rule
2730 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2731
30f1b100 2732 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2733 my $nomatch = $1;
9d6f90e6 2734 my $cidr = $2;
d46b1ef6
DM		 2735 my $errors;
2736
2737 if ($nomatch && !$feature_ipset_nomatch) {
2738 $errors->{nomatch} = "nomatch not supported by kernel";
2739 }
2a052ee3 2740
4803b296
DM		 2741 eval {
2742 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2743 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2744 } else {
ae029a88 2745 $cidr = parse_ip_or_cidr($cidr);
92e1209b 2746 }
4803b296
DM		 2747 };
2748 if (my $err = $@) {
c8c534f7 2749 chomp $err;
d46b1ef6 2750 $errors->{cidr} = $err;
2a052ee3 2751 }
2a052ee3 2752
e34d0e58 2753 my $entry = { cidr => $cidr };
9d6f90e6
DM		 2754 $entry->{nomatch} = 1 if $nomatch;
2755 $entry->{comment} = $comment if $comment;
d46b1ef6 2756 $entry->{errors} = $errors if $errors;
e34d0e58 2757
c8c534f7 2758 if ($verbose && $errors) {
9a3061c7 2759 warn "$prefix - errors in ipset '$group': $line\n";
c8c534f7
DM		 2760 foreach my $p (keys %{$errors}) {
2761 warn " $p: $errors->{$p}\n";
2762 }
2763 }
2764
9d6f90e6 2765 push @{$res->{$section}->{$group}}, $entry;
1210ae94
DM		 2766 } else {
2767 warn "$prefix: skip line - unknown section\n";
2768 next;
51bae274 2769 }
5e1267a5
DM		 2770 }
2771
2772 return $res;
2773}
2774
e5cd1ee0 2775sub parse_hostfw_config {
1210ae94
DM		 2776 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2777
2778 my $empty_conf = { rules => [], options => {}};
2779
e5cd1ee0 2780 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
1210ae94
DM		 2781}
2782
e5cd1ee0 2783sub parse_vmfw_config {
1210ae94
DM		 2784 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2785
2786 my $empty_conf = {
2787 rules => [],
2788 options => {},
2789 aliases => {},
2790 ipset => {} ,
2791 ipset_comments => {},
2792 };
2793
e5cd1ee0 2794 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
1210ae94
DM		 2795}
2796
e5cd1ee0 2797sub parse_clusterfw_config {
1210ae94
DM		 2798 my ($filename, $fh, $verbose) = @_;
2799
2800 my $section;
2801 my $group;
2802
2803 my $empty_conf = {
2804 rules => [],
2805 options => {},
2806 aliases => {},
2807 groups => {},
2808 group_comments => {},
2809 ipset => {} ,
2810 ipset_comments => {},
2811 };
2812
e5cd1ee0 2813 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
1210ae94
DM		 2814}
2815
06320eb0
DM		 2816sub run_locked {
2817 my ($code, @param) = @_;
2818
2819 my $timeout = 10;
2820
2821 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2822
2823 die $@ if $@;
2824
2825 return $res;
2826}
2827
5e1267a5
DM		 2828sub read_local_vm_config {
2829
5e1267a5 2830 my $qemu = {};
3b4882dc 2831 my $lxc = {};
5e1267a5 2832
fdefeeab 2833 my $vmdata = { qemu => $qemu, lxc => $lxc };
5e1267a5 2834
c8301d63
DM		 2835 my $vmlist = PVE::Cluster::get_vmlist();
2836 return $vmdata if !$vmlist || !$vmlist->{ids};
2837 my $ids = $vmlist->{ids};
2838
2839 foreach my $vmid (keys %$ids) {
2840 next if !$vmid; # skip VE0
2841 my $d = $ids->{$vmid};
2842 next if !$d->{node} || $d->{node} ne $nodename;
2843 next if !$d->{type};
fdefeeab 2844 if ($d->{type} eq 'qemu') {
d9fee004 2845 if ($have_qemu_server) {
b5a16dd3 2846 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
d9fee004
DM		 2847 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2848 $qemu->{$vmid} = $conf;
2849 }
c8301d63 2850 }
3b4882dc
AG		 2851 } elsif ($d->{type} eq 'lxc') {
2852 if ($have_lxc) {
a7c85d56 2853 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3b4882dc
AG		 2854 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2855 $lxc->{$vmid} = $conf;
2856 }
2857 }
2858 }
5e1267a5 2859 }
d9fee004 2860
5e1267a5
DM		 2861 return $vmdata;
2862};
2863
e7b35711 2864sub load_vmfw_conf {
a523e057 2865 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
e7b35711
DM		 2866
2867 my $vmfw_conf = {};
2868
21053409 2869 $dir = $pvefw_conf_dir if !defined($dir);
8aef5177
DM		 2870
2871 my $filename = "$dir/$vmid.fw";
e7b35711 2872 if (my $fh = IO::File->new($filename, O_RDONLY)) {
e5cd1ee0 2873 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
708ba714 2874 $vmfw_conf->{vmid} = $vmid;
e7b35711
DM		 2875 }
2876
2877 return $vmfw_conf;
2878}
2879
464f933e 2880my $format_rules = sub {
dba740a9 2881 my ($rules, $allow_iface) = @_;
464f933e
DM		 2882
2883 my $raw = '';
2884
2885 foreach my $rule (@$rules) {
c14dacdf 2886 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 2887 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2888 $raw .= uc($rule->{type});
7ca36671
DM		 2889 if ($rule->{macro}) {
2890 $raw .= " $rule->{macro}($rule->{action})";
2891 } else {
2892 $raw .= " " . $rule->{action};
2893 }
dba740a9
DM		 2894 if ($allow_iface && $rule->{iface}) {
2895 $raw .= " -i $rule->{iface}";
2896 }
c14dacdf
DM		 2897
2898 if ($rule->{type} ne 'group') {
dba740a9
DM		 2899 $raw .= " -source $rule->{source}" if $rule->{source};
2900 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2901 $raw .= " -p $rule->{proto}" if $rule->{proto};
2902 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2903 $raw .= " -sport $rule->{sport}" if $rule->{sport};
c14dacdf
DM		 2904 }
2905
cbb5d6f3 2906 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 2907 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2908 $raw .= "\n";
2909 } else {
c14dacdf 2910 die "unknown rule type '$rule->{type}'";
464f933e
DM		 2911 }
2912 }
2913
2914 return $raw;
2915};
2916
2917my $format_options = sub {
68c90e21
DM		 2918 my ($options) = @_;
2919
2920 my $raw = '';
464f933e
DM		 2921
2922 $raw .= "[OPTIONS]\n\n";
2923 foreach my $opt (keys %$options) {
2924 $raw .= "$opt: $options->{$opt}\n";
2925 }
2926 $raw .= "\n";
68c90e21
DM		 2927
2928 return $raw;
464f933e
DM		 2929};
2930
0d5f0a0f
DM		 2931my $format_aliases = sub {
2932 my ($aliases) = @_;
2933
2934 my $raw = '';
2935
2936 $raw .= "[ALIASES]\n\n";
2937 foreach my $k (keys %$aliases) {
81d574a7
DM		 2938 my $e = $aliases->{$k};
2939 $raw .= "$e->{name} $e->{cidr}";
2940 $raw .= " # " . encode('utf8', $e->{comment})
2941 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2942 $raw .= "\n";
0d5f0a0f
DM		 2943 }
2944 $raw .= "\n";
2945
2946 return $raw;
2947};
2948
1210ae94
DM		 2949my $format_ipsets = sub {
2950 my ($fw_conf) = @_;
2951
9d6f90e6
DM		 2952 my $raw = '';
2953
1210ae94
DM		 2954 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2955 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2956 my $utf8comment = encode('utf8', $comment);
2957 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2958 } else {
2959 $raw .= "[IPSET $ipset]\n\n";
2960 }
2961 my $options = $fw_conf->{ipset}->{$ipset};
6e299ae3 2962
1210ae94
DM		 2963 my $nethash = {};
2964 foreach my $entry (@$options) {
2965 $nethash->{$entry->{cidr}} = $entry;
2966 }
2967
2968 foreach my $cidr (sort keys %$nethash) {
2969 my $entry = $nethash->{$cidr};
2970 my $line = $entry->{nomatch} ? '!' : '';
2971 $line .= $entry->{cidr};
2972 $line .= " # " . encode('utf8', $entry->{comment})
2973 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2974 $raw .= "$line\n";
2975 }
2976
2977 $raw .= "\n";
9d6f90e6 2978 }
e34d0e58 2979
9d6f90e6
DM		 2980 return $raw;
2981};
2982
464f933e
DM		 2983sub save_vmfw_conf {
2984 my ($vmid, $vmfw_conf) = @_;
2985
2986 my $raw = '';
2987
2988 my $options = $vmfw_conf->{options};
89ea63c8 2989 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 2990
e76a9f53 2991 my $aliases = $vmfw_conf->{aliases};
89ea63c8 2992 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e76a9f53 2993
89ea63c8 2994 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
1210ae94 2995
8824b2f0 2996 my $rules = $vmfw_conf->{rules} || [];
89ea63c8 2997 if ($rules && scalar(@$rules)) {
464f933e
DM		 2998 $raw .= "[RULES]\n\n";
2999 $raw .= &$format_rules($rules, 1);
3000 $raw .= "\n";
3001 }
3002
21053409 3003 my $filename = "$pvefw_conf_dir/$vmid.fw";
c32e04e6
FG		 3004 if ($raw) {
3005 mkdir $pvefw_conf_dir;
3006 PVE::Tools::file_set_contents($filename, $raw);
3007 } else {
3008 unlink $filename;
3009 }
464f933e
DM		 3010}
3011
edee9035
AG		 3012sub remove_vmfw_conf {
3013 my ($vmid) = @_;
3014
3015 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3016
3017 unlink $vmfw_conffile;
3018}
3019
5471ff7c
AG		 3020sub clone_vmfw_conf {
3021 my ($vmid, $newid) = @_;
3022
3023 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3024 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3025
3026 if (-f $clonevm_conffile) {
3027 unlink $clonevm_conffile;
3028 }
3029 if (-f $sourcevm_conffile) {
3030 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3031 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3032 }
3033}
3034
6fc63ffd 3035sub read_vm_firewall_configs {
a523e057 3036 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
8aef5177 3037
6fc63ffd 3038 my $vmfw_configs = {};
c8301d63 3039
b6b8e6ad 3040 foreach my $vmid (keys %{$vmdata->{qemu}}) {
a523e057 3041 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
b6b8e6ad
DM		 3042 next if !$vmfw_conf->{options}; # skip if file does not exists
3043 $vmfw_configs->{$vmid} = $vmfw_conf;
3044 }
3b4882dc
AG		 3045 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3046 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3047 next if !$vmfw_conf->{options}; # skip if file does not exists
3048 $vmfw_configs->{$vmid} = $vmfw_conf;
3049 }
5e1267a5 3050
6fc63ffd 3051 return $vmfw_configs;
5e1267a5
DM		 3052}
3053
2d404ffc
DM		 3054sub get_option_log_level {
3055 my ($options, $k) = @_;
3056
3057 my $v = $options->{$k};
178a63be 3058 $v = $default_log_level if !defined($v);
2d404ffc
DM		 3059
3060 return undef if $v eq '' || $v eq 'nolog';
3061
3062 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3063
3064 return $v if ($v >= 0) && ($v <= 7);
3065
3066 warn "unknown log level ($k = '$v')\n";
3067
3068 return undef;
3069}
3070
d8f2505e 3071sub generate_std_chains {
db8a955f
DM		 3072 my ($ruleset, $options, $ipversion) = @_;
3073
3074 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
cbb5d6f3 3075
2d404ffc
DM		 3076 my $loglevel = get_option_log_level($options, 'smurf_log_level');
3077
db8a955f 3078 my $chain;
782c4cde 3079
db8a955f
DM		 3080 if ($ipversion == 4) {
3081 # same as shorewall smurflog.
3082 $chain = 'PVEFW-smurflog';
3083 $std_chains->{$chain} = [];
3084
3085 push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3086 push @{$std_chains->{$chain}}, "-j DROP";
3087 }
2d404ffc
DM		 3088
3089 # same as shorewall logflags action.
3090 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 3091 $chain = 'PVEFW-logflags';
db8a955f 3092 $std_chains->{$chain} = [];
12f3796e 3093
782c4cde 3094 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
db8a955f
DM		 3095 push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3096 push @{$std_chains->{$chain}}, "-j DROP";
d8f2505e 3097
db8a955f 3098 foreach my $chain (keys %$std_chains) {
d8f2505e 3099 ruleset_create_chain($ruleset, $chain);
db8a955f 3100 foreach my $rule (@{$std_chains->{$chain}}) {
d8f2505e 3101 if (ref($rule)) {
88c26d5e 3102 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
d8f2505e
DM		 3103 } else {
3104 ruleset_addrule($ruleset, $chain, $rule);
3105 }
3106 }
3107 }
3108}
3109
34cdedfa 3110sub generate_ipset_chains {
74601077 3111 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
34cdedfa 3112
74601077 3113 foreach my $ipset (keys %{$ipsets}) {
34cdedfa 3114
74601077 3115 my $options = $ipsets->{$ipset};
34cdedfa 3116
ebf72e49
WB		 3117 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3118 if (my $ips = $device_ips->{$1}) {
3119 $options = [@$options, @$ips];
3120 }
3121 }
3122
88c26d5e
DM		 3123 # remove duplicates
3124 my $nethash = {};
3125 foreach my $entry (@$options) {
3126 next if $entry->{errors}; # skip entries with errors
3127 eval {
3128 my ($cidr, $ver);
3129 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3130 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3131 } else {
3132 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3133 }
3134 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3135 if ($ver == 6) {
e0a9139f
WB		 3136 # ip_compress_address takes an address only, no CIDR
3137 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3138 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3139 $cidr .= $prefix_len if defined($prefix_len);
88c26d5e
DM		 3140 $cidr =~ s|/128$||;
3141 } else {
3142 $cidr =~ s|/32$||;
3143 }
34cdedfa 3144
88c26d5e
DM		 3145 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3146 };
3147 warn $@ if $@;
3148 }
6d959e3f 3149
88c26d5e
DM		 3150 foreach my $ipversion (4, 6) {
3151 my $data = $nethash->{$ipversion};
30f1b100 3152
88c26d5e 3153 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
6d959e3f 3154
88c26d5e
DM		 3155 my $hashsize = scalar(@$options);
3156 if ($hashsize <= 64) {
3157 $hashsize = 64;
3158 } else {
3159 $hashsize = round_powerof2($hashsize);
3160 }
6d959e3f 3161
88c26d5e 3162 my $family = $ipversion == "6" ? "inet6" : "inet";
30f1b100 3163
88c26d5e 3164 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
6d959e3f 3165
88c26d5e
DM		 3166 foreach my $cidr (sort keys %$data) {
3167 my $entry = $data->{$cidr};
6d959e3f 3168
88c26d5e
DM		 3169 my $cmd = "add $name $cidr";
3170 if ($entry->{nomatch}) {
3171 if ($feature_ipset_nomatch) {
3172 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3173 } else {
3174 warn "ignore !$cidr - nomatch not supported by kernel\n";
3175 }
6d959e3f 3176 } else {
88c26d5e 3177 push @{$ipset_ruleset->{$name}}, $cmd;
6d959e3f 3178 }
9d6f90e6 3179 }
9d6f90e6 3180 }
34cdedfa 3181 }
2a052ee3
AD		 3182}
3183
3184sub round_powerof2 {
dd7a13fd 3185 my ($int) = @_;
2a052ee3 3186
dd7a13fd
DM		 3187 $int--;
3188 $int |= $int >> $_ foreach (1,2,4,8,16);
3189 return ++$int;
34cdedfa
AD		 3190}
3191
fca39c2c 3192sub load_clusterfw_conf {
d4cda423 3193 my ($filename, $verbose) = @_;
8aef5177
DM		 3194
3195 $filename = $clusterfw_conf_filename if !defined($filename);
530c005e 3196
fca39c2c 3197 my $cluster_conf = {};
8aef5177 3198 if (my $fh = IO::File->new($filename, O_RDONLY)) {
e5cd1ee0 3199 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
51bae274 3200 }
5e1267a5 3201
fca39c2c 3202 return $cluster_conf;
e5d76bde
DM		 3203}
3204
fca39c2c
DM		 3205sub save_clusterfw_conf {
3206 my ($cluster_conf) = @_;
9c7e0858
DM		 3207
3208 my $raw = '';
9c7e0858 3209
c6f5cc88 3210 my $options = $cluster_conf->{options};
89ea63c8 3211 $raw .= &$format_options($options) if $options && scalar(keys %$options);
9c7e0858 3212
0d5f0a0f 3213 my $aliases = $cluster_conf->{aliases};
89ea63c8 3214 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e34d0e58 3215
89ea63c8 3216 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
1210ae94 3217
c6f5cc88 3218 my $rules = $cluster_conf->{rules};
89ea63c8 3219 if ($rules && scalar(@$rules)) {
c6f5cc88 3220 $raw .= "[RULES]\n\n";
63c91681 3221 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 3222 $raw .= "\n";
3223 }
3224
89ea63c8
DM		 3225 if ($cluster_conf->{groups}) {
3226 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3227 my $rules = $cluster_conf->{groups}->{$group};
3228 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3229 my $utf8comment = encode('utf8', $comment);
3230 $raw .= "[group $group] # $utf8comment\n\n";
3231 } else {
3232 $raw .= "[group $group]\n\n";
3233 }
0d22acb3 3234
89ea63c8
DM		 3235 $raw .= &$format_rules($rules, 0);
3236 $raw .= "\n";
3237 }
9c7e0858
DM		 3238 }
3239
c32e04e6
FG		 3240 if ($raw) {
3241 mkdir $pvefw_conf_dir;
3242 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3243 } else {
3244 unlink $clusterfw_conf_filename;
3245 }
9c7e0858
DM		 3246}
3247
8b27beb9 3248sub load_hostfw_conf {
a523e057 3249 my ($cluster_conf, $filename, $verbose) = @_;
8aef5177
DM		 3250
3251 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9
DM		 3252
3253 my $hostfw_conf = {};
8aef5177 3254 if (my $fh = IO::File->new($filename, O_RDONLY)) {
e5cd1ee0 3255 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
8b27beb9
DM		 3256 }
3257 return $hostfw_conf;
3258}
3259
63c91681
DM		 3260sub save_hostfw_conf {
3261 my ($hostfw_conf) = @_;
3262
3263 my $raw = '';
3264
3265 my $options = $hostfw_conf->{options};
89ea63c8 3266 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3267
63c91681 3268 my $rules = $hostfw_conf->{rules};
89ea63c8 3269 if ($rules && scalar(@$rules)) {
63c91681
DM		 3270 $raw .= "[RULES]\n\n";
3271 $raw .= &$format_rules($rules, 1);
3272 $raw .= "\n";
3273 }
3274
c32e04e6
FG		 3275 if ($raw) {
3276 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3277 } else {
3278 unlink $hostfw_conf_filename;
3279 }
63c91681
DM		 3280}
3281
e5d76bde 3282sub compile {
d4cda423 3283 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3dfa8a7f 3284
8aef5177
DM		 3285 my $vmfw_configs;
3286
3287 if ($vmdata) { # test mode
3288 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3289 my $filename = "$testdir/cluster.fw";
d4cda423 3290 $cluster_conf = load_clusterfw_conf($filename, $verbose);
8aef5177
DM		 3291
3292 $filename = "$testdir/host.fw";
a523e057 3293 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
8aef5177 3294
a523e057 3295 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
8aef5177 3296 } else { # normal operation
d4cda423 3297 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
8aef5177 3298
a523e057 3299 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
8aef5177
DM		 3300
3301 $vmdata = read_local_vm_config();
a523e057 3302 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
8aef5177 3303 }
3dfa8a7f 3304
147dd882 3305 return ({},{},{}) if !$cluster_conf->{options}->{enable};
9268573a 3306
525778d7
DM		 3307 my $localnet;
3308 if ($cluster_conf->{aliases}->{local_network}) {
3309 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3310 } else {
afcd29b3
DM		 3311 my $localnet_ver;
3312 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3313
3314 $cluster_conf->{aliases}->{local_network} = {
3315 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
525778d7
DM		 3316 }
3317
3318 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
bfc488f6 3319
147dd882
WB		 3320 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3321 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3322 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3323
3324 return ($ruleset, $ipset_ruleset, $rulesetv6);
3325}
3326
3327sub compile_iptables_filter {
3328 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
085fd492 3329
3fa83edf
DM		 3330 my $ruleset = {};
3331
dec84fcd
DM		 3332 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3333 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 3334
fadb13dd 3335 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 3336
8b27beb9 3337 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 3338
88733a74
AD		 3339 # fixme: what log level should we use here?
3340 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3341
097820b0 3342 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
88733a74 3343
e2943485 3344 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
88c26d5e 3345 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
e2943485 3346
d1b41c08 3347 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
e2943485
DM		 3348
3349 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
d1b41c08 3350 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
e2943485 3351
db8a955f 3352 generate_std_chains($ruleset, $hostfw_options, $ipversion);
fadb13dd 3353
6d2ab017 3354 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 3355
35d1d6da 3356 if ($hostfw_enable) {
aedde2c2 3357 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
1a9978ed
DM		 3358 warn $@ if $@; # just to be sure - should not happen
3359 }
3fa83edf 3360
6158271d 3361 # generate firewall rules for QEMU VMs
0a0ba19e 3362 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
1a9978ed
DM		 3363 eval {
3364 my $conf = $vmdata->{qemu}->{$vmid};
3365 my $vmfw_conf = $vmfw_configs->{$vmid};
3366 return if !$vmfw_conf;
1a9978ed 3367
0a0ba19e 3368 foreach my $netid (sort keys %$conf) {
1a9978ed
DM		 3369 next if $netid !~ m/^net(\d+)$/;
3370 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3371 next if !$net->{firewall};
3372 my $iface = "tap${vmid}i$1";
3373
3374 my $macaddr = $net->{macaddr};
3375 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
84870b1a 3376 $vmfw_conf, $vmid, 'IN', $ipversion);
1a9978ed 3377 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
84870b1a 3378 $vmfw_conf, $vmid, 'OUT', $ipversion);
1a9978ed
DM		 3379 }
3380 };
3381 warn $@ if $@; # just to be sure - should not happen
3fa83edf 3382 }
c8301d63 3383
3b4882dc 3384 # generate firewall rules for LXC containers
0a0ba19e 3385 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3b4882dc
AG		 3386 eval {
3387 my $conf = $vmdata->{lxc}->{$vmid};
3388 my $vmfw_conf = $vmfw_configs->{$vmid};
3389 return if !$vmfw_conf;
3390
3b4882dc 3391 if ($vmfw_conf->{options}->{enable}) {
0a0ba19e 3392 foreach my $netid (sort keys %$conf) {
3b4882dc 3393 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3394 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3b4882dc
AG		 3395 next if !$net->{firewall};
3396 my $iface = "veth${vmid}i$1";
3397 my $macaddr = $net->{hwaddr};
3398 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3399 $vmfw_conf, $vmid, 'IN', $ipversion);
3400 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3401 $vmfw_conf, $vmid, 'OUT', $ipversion);
3402 }
3403 }
3404 };
3405 warn $@ if $@; # just to be sure - should not happen
3406 }
3407
097820b0
AD		 3408 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3409 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3410 }
3411
147dd882
WB		 3412 return $ruleset;
3413}
3414
ebf72e49
WB		 3415sub mac_to_linklocal {
3416 my ($macaddr) = @_;
3417 my @parts = split(/:/, $macaddr);
3418 # The standard link local address uses the fe80::/64 prefix with the
3419 # modified EUI-64 identifier derived from the MAC address by flipping the
3420 # universal/local bit and inserting FF:FE in the middle.
3421 # See RFC 4291.
3422 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3423 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3424 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3425}
3426
147dd882
WB		 3427sub compile_ipsets {
3428 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3429
3430 my $localnet;
3431 if ($cluster_conf->{aliases}->{local_network}) {
3432 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3433 } else {
3434 my $localnet_ver;
3435 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3436
3437 $cluster_conf->{aliases}->{local_network} = {
3438 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3439 }
3440
3441 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3442
3443
3444 my $ipset_ruleset = {};
3445
3446 # generate ipsets for QEMU VMs
3447 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3448 eval {
3449 my $conf = $vmdata->{qemu}->{$vmid};
3450 my $vmfw_conf = $vmfw_configs->{$vmid};
3451 return if !$vmfw_conf;
3452
74601077
WB		 3453 # When the 'ipfilter' option is enabled every device for which there
3454 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3455 # ipset.
3456 # The reason is that ipfilter ipsets are always filled with standard
3457 # IPv6 link-local filters.
3458 my $ipsets = $vmfw_conf->{ipset};
3459 my $implicit_sets = {};
3460
ebf72e49
WB		 3461 my $device_ips = {};
3462 foreach my $netid (keys %$conf) {
3463 next if $netid !~ m/^net(\d+)$/;
3464 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3465 next if !$net->{firewall};
3466
74601077
WB		 3467 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3468 $implicit_sets->{"ipfilter-$netid"} = [];
3469 }
3470
ebf72e49
WB		 3471 my $macaddr = $net->{macaddr};
3472 my $linklocal = mac_to_linklocal($macaddr);
3473 $device_ips->{$netid} = [
3474 { cidr => $linklocal },
3475 { cidr => 'fe80::/10', nomatch => 1 }
3476 ];
3477 }
3478
74601077
WB		 3479 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3480 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
147dd882
WB		 3481 };
3482 warn $@ if $@; # just to be sure - should not happen
3483 }
3484
3485 # generate firewall rules for LXC containers
3486 foreach my $vmid (keys %{$vmdata->{lxc}}) {
aa229652
WB		 3487 eval {
3488 my $conf = $vmdata->{lxc}->{$vmid};
3489 my $vmfw_conf = $vmfw_configs->{$vmid};
3490 return if !$vmfw_conf;
147dd882 3491
74601077
WB		 3492 # When the 'ipfilter' option is enabled every device for which there
3493 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3494 # ipset.
3495 # The reason is that ipfilter ipsets are always filled with standard
383fe679
WB		 3496 # IPv6 link-local filters, as well as the IP addresses configured
3497 # for the container.
74601077
WB		 3498 my $ipsets = $vmfw_conf->{ipset};
3499 my $implicit_sets = {};
3500
ebf72e49
WB		 3501 my $device_ips = {};
3502 foreach my $netid (keys %$conf) {
3503 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3504 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
ebf72e49
WB		 3505 next if !$net->{firewall};
3506
74601077
WB		 3507 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3508 $implicit_sets->{"ipfilter-$netid"} = [];
3509 }
3510
ebf72e49
WB		 3511 my $macaddr = $net->{hwaddr};
3512 my $linklocal = mac_to_linklocal($macaddr);
383fe679 3513 my $set = $device_ips->{$netid} = [
ebf72e49
WB		 3514 { cidr => $linklocal },
3515 { cidr => 'fe80::/10', nomatch => 1 }
3516 ];
37ef1ce1 3517 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
383fe679
WB		 3518 push @$set, { cidr => $1 };
3519 }
37ef1ce1 3520 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
383fe679
WB		 3521 push @$set, { cidr => $1 };
3522 }
ebf72e49
WB		 3523 }
3524
74601077
WB		 3525 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3526 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
aa229652
WB		 3527 };
3528 warn $@ if $@; # just to be sure - should not happen
147dd882
WB		 3529 }
3530
74601077 3531 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
27083984 3532
147dd882 3533 return $ipset_ruleset;
3fa83edf
DM		 3534}
3535
3536sub get_ruleset_status {
4bd0a9c4 3537 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM		 3538
3539 my $statushash = {};
3540
3541 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 3542 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 3543
3fa83edf
DM		 3544 $statushash->{$chain}->{sig} = $sig;
3545
3546 my $oldsig = $active_chains->{$chain};
3547 if (!defined($oldsig)) {
3548 $statushash->{$chain}->{action} = 'create';
3549 } else {
3550 if ($oldsig eq $sig) {
3551 $statushash->{$chain}->{action} = 'exists';
3552 } else {
3553 $statushash->{$chain}->{action} = 'update';
3554 }
3555 }
3556 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3557 foreach my $cmd (@{$ruleset->{$chain}}) {
3558 print "\t$cmd\n" if $verbose;
3559 }
3560 }
3561
3562 foreach my $chain (sort keys %$active_chains) {
3563 if (!defined($ruleset->{$chain})) {
3564 my $sig = $active_chains->{$chain};
3565 $statushash->{$chain}->{action} = 'delete';
3566 $statushash->{$chain}->{sig} = $sig;
3567 print "delete $chain ($sig)\n" if $verbose;
3568 }
6158271d 3569 }
2a052ee3 3570
3fa83edf
DM		 3571 return $statushash;
3572}
3573
3fa83edf
DM		 3574sub print_sig_rule {
3575 my ($chain, $sig) = @_;
3576
09d5f68e
DM		 3577 # We just use this to store a SHA1 checksum used to detect changes
3578 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 3579}
3580
df7cb349 3581sub get_ruleset_cmdlist {
17da5c0f 3582 my ($ruleset, $verbose, $iptablescmd) = @_;
3fa83edf 3583
3fa83edf 3584 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 3585
17da5c0f 3586 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
4bd0a9c4 3587 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM		 3588
3589 # create missing chains first
3590 foreach my $chain (sort keys %$ruleset) {
3591 my $stat = $statushash->{$chain};
3592 die "internal error" if !$stat;
3593 next if $stat->{action} ne 'create';
886aba9c 3594
3fa83edf
DM		 3595 $cmdlist .= ":$chain - [0:0]\n";
3596 }
3597
4bd0a9c4 3598 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
55fad3b7
DM		 3599 my $chain = "PVEFW-$h";
3600 if ($ruleset->{$chain} && !$hooks->{$h}) {
3601 $cmdlist .= "-A $h -j $chain\n";
4bd0a9c4 3602 }
3fa83edf
DM		 3603 }
3604
3605 foreach my $chain (sort keys %$ruleset) {
3606 my $stat = $statushash->{$chain};
3607 die "internal error" if !$stat;
3608
3609 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3610 $cmdlist .= "-F $chain\n";
3611 foreach my $cmd (@{$ruleset->{$chain}}) {
3612 $cmdlist .= "$cmd\n";
3613 }
3614 $cmdlist .= print_sig_rule($chain, $stat->{sig});
3615 } elsif ($stat->{action} eq 'delete') {
f5d28682 3616 die "internal error"; # this should not happen
3fa83edf
DM		 3617 } elsif ($stat->{action} eq 'exists') {
3618 # do nothing
3619 } else {
3620 die "internal error - unknown status '$stat->{action}'";
3621 }
3622 }
3623
f5d28682
DM		 3624 foreach my $chain (keys %$statushash) {
3625 next if $statushash->{$chain}->{action} ne 'delete';
3626 $cmdlist .= "-F $chain\n";
3627 }
3628 foreach my $chain (keys %$statushash) {
3629 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 3630 next if $chain eq 'PVEFW-INPUT';
3631 next if $chain eq 'PVEFW-OUTPUT';
3632 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 3633 $cmdlist .= "-X $chain\n";
3634 }
3635
3f95d14a 3636 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 3637
3fa83edf
DM		 3638 $cmdlist .= "COMMIT\n";
3639
3f95d14a 3640 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 3641}
3642
34cdedfa 3643sub get_ipset_cmdlist {
dd7a13fd 3644 my ($ruleset, $verbose) = @_;
34cdedfa
AD		 3645
3646 my $cmdlist = "";
3647
dd7a13fd
DM		 3648 my $delete_cmdlist = "";
3649
4bd0a9c4
DM		 3650 my $active_chains = ipset_get_chains();
3651 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 3652
e34d0e58 3653 # remove stale _swap chains
30f1b100
DM		 3654 foreach my $chain (keys %$active_chains) {
3655 if ($chain =~ m/^PVEFW-\S+_swap$/) {
3656 $cmdlist .= "destroy $chain\n";
3657 }
3658 }
3659
c69cf614 3660 foreach my $chain (keys %$ruleset) {
c69cf614
DM		 3661 my $stat = $statushash->{$chain};
3662 die "internal error" if !$stat;
3663
3664 if ($stat->{action} eq 'create') {
3665 foreach my $cmd (@{$ruleset->{$chain}}) {
3666 $cmdlist .= "$cmd\n";
3667 }
3668 }
3669 }
3670
3671 foreach my $chain (keys %$ruleset) {
6d959e3f
DM		 3672 my $stat = $statushash->{$chain};
3673 die "internal error" if !$stat;
34cdedfa 3674
dd7a13fd
DM		 3675 if ($stat->{action} eq 'update') {
3676 my $chain_swap = $chain."_swap";
cbb5d6f3 3677
dd7a13fd
DM		 3678 foreach my $cmd (@{$ruleset->{$chain}}) {
3679 $cmd =~ s/$chain/$chain_swap/;
3680 $cmdlist .= "$cmd\n";
34cdedfa 3681 }
dd7a13fd
DM		 3682 $cmdlist .= "swap $chain_swap $chain\n";
3683 $cmdlist .= "flush $chain_swap\n";
3684 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 3685 }
dd7a13fd 3686 }
3f95d14a 3687
88c26d5e 3688 # the remove unused chains
c69cf614 3689 foreach my $chain (keys %$statushash) {
dd7a13fd 3690 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 3691
dd7a13fd
DM		 3692 $delete_cmdlist .= "flush $chain\n";
3693 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 3694 }
3695
dd7a13fd 3696 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 3697
dd7a13fd 3698 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 3699}
3700
6b9f68a2 3701sub apply_ruleset {
17da5c0f 3702 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
6b9f68a2
DM		 3703
3704 enable_bridge_firewall();
3705
cbb5d6f3 3706 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
9a462317 3707 get_ipset_cmdlist($ipset_ruleset, $verbose);
6b9f68a2 3708
81a0bf43 3709 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
17da5c0f 3710 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
2a052ee3 3711
81a0bf43
DM		 3712 if ($verbose) {
3713 if ($ipset_changes) {
3714 print "ipset changes:\n";
3715 print $ipset_create_cmdlist if $ipset_create_cmdlist;
3716 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3717 }
3f95d14a 3718
81a0bf43
DM		 3719 if ($changes) {
3720 print "iptables changes:\n";
3721 print $cmdlist;
3722 }
17da5c0f
AD		 3723
3724 if ($changesv6) {
3725 print "ip6tables changes:\n";
3726 print $cmdlistv6;
3727 }
81a0bf43 3728 }
3fa83edf 3729
259db1e6
DM		 3730 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3731 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3732
2a052ee3 3733 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 3734
259db1e6
DM		 3735 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3736 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3737
3fa83edf 3738 iptables_restore_cmdlist($cmdlist);
259db1e6
DM		 3739
3740 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3741 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3742
17da5c0f 3743 ip6tables_restore_cmdlist($cmdlistv6);
3fa83edf 3744
259db1e6
DM		 3745 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3746 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3747
dd7a13fd 3748 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 3749
6158271d 3750 # test: re-read status and check if everything is up to date
4bd0a9c4 3751 my $active_chains = iptables_get_chains();
81a0bf43 3752 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3fa83edf
DM		 3753
3754 my $errors;
3755 foreach my $chain (sort keys %$ruleset) {
3756 my $stat = $statushash->{$chain};
3757 if ($stat->{action} ne 'exists') {
3758 warn "unable to update chain '$chain'\n";
3759 $errors = 1;
3760 }
3761 }
b6360c3f 3762
17da5c0f
AD		 3763 my $active_chainsv6 = iptables_get_chains("ip6tables");
3764 my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3765
3766 foreach my $chain (sort keys %$rulesetv6) {
3767 my $stat = $statushashv6->{$chain};
3768 if ($stat->{action} ne 'exists') {
3769 warn "unable to update chain '$chain'\n";
3770 $errors = 1;
3771 }
3772 }
3773
3fa83edf 3774 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 3775
3776 update_nf_conntrack_max($hostfw_conf);
3777
3778 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3779
b6360c3f
DM		 3780}
3781
490cdead
DM		 3782sub update_nf_conntrack_max {
3783 my ($hostfw_conf) = @_;
3784
3785 my $max = 65536; # reasonable default
3786
3787 my $options = $hostfw_conf->{options} || {};
3788
3789 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3790 $max = $options->{nf_conntrack_max};
3791 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3792 }
3793
3794 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3795 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3796
3797 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3798
3799 if ($current != $max) {
3800 my $hashsize = int($max/4);
3801 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3802 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3803 }
3804}
3805
28c082a1
AD		 3806sub update_nf_conntrack_tcp_timeout_established {
3807 my ($hostfw_conf) = @_;
3808
3809 my $options = $hostfw_conf->{options} || {};
3810
3811 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3812
3813 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3814}
3815
c4a2e5ae
DM		 3816sub remove_pvefw_chains {
3817
7b7b2654
AD		 3818 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3819 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3820 PVE::Firewall::remove_pvefw_chains_ipset();
3821
3822}
3823
3824sub remove_pvefw_chains_iptables {
3825 my ($iptablescmd) = @_;
3826
3827 my ($chash, $hooks) = iptables_get_chains($iptablescmd);
c4a2e5ae
DM		 3828 my $cmdlist = "*filter\n";
3829
3830 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3831 if ($hooks->{$h}) {
3832 $cmdlist .= "-D $h -j PVEFW-$h\n";
3833 }
3834 }
cbb5d6f3 3835
c4a2e5ae
DM		 3836 foreach my $chain (keys %$chash) {
3837 $cmdlist .= "-F $chain\n";
3838 }
3839
3840 foreach my $chain (keys %$chash) {
3841 $cmdlist .= "-X $chain\n";
3842 }
3843 $cmdlist .= "COMMIT\n";
3844
7b7b2654
AD		 3845 if($iptablescmd eq "ip6tables") {
3846 ip6tables_restore_cmdlist($cmdlist);
3847 } else {
3848 iptables_restore_cmdlist($cmdlist);
3849 }
3850}
3851
3852sub remove_pvefw_chains_ipset {
55fad3b7
DM		 3853
3854 my $ipset_chains = ipset_get_chains();
3855
7b7b2654 3856 my $cmdlist = "";
55fad3b7
DM		 3857
3858 foreach my $chain (keys %$ipset_chains) {
88c26d5e
DM		 3859 $cmdlist .= "flush $chain\n";
3860 $cmdlist .= "destroy $chain\n";
55fad3b7
DM		 3861 }
3862
7b7b2654 3863 ipset_restore_cmdlist($cmdlist) if $cmdlist;
c4a2e5ae
DM		 3864}
3865
8b453a09
DM		 3866sub init {
3867 my $cluster_conf = load_clusterfw_conf();
3868 my $cluster_options = $cluster_conf->{options};
3869 my $enable = $cluster_options->{enable};
3870
3871 return if !$enable;
3872
3873 # load required modules here
3874}
3875
6b9f68a2 3876sub update {
6b9f68a2 3877 my $code = sub {
3dfa8a7f
DM		 3878
3879 my $cluster_conf = load_clusterfw_conf();
3880 my $cluster_options = $cluster_conf->{options};
3881
55fad3b7 3882 if (!$cluster_options->{enable}) {
b22130d3 3883 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 3884 return;
3885 }
3886
50f9a28d 3887 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3dfa8a7f 3888
638c755a 3889 my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
490cdead 3890
17da5c0f 3891 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
6b9f68a2
DM		 3892 };
3893
3894 run_locked($code);
3895}
3896
b6360c3f 38971;
Firewall test scripts