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followup code cleanup
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
585ede43 5
09d5f68e 6use Digest::SHA;
0fd61594
TL		 7use Encode;
8use File::Basename;
9use File::Path;
10use IO::File;
11use Net::IP;
12use POSIX;
06208a01 13use Socket qw(AF_INET AF_INET6 inet_ntop inet_pton);
0fd61594
TL		 14use Storable qw(dclone);
15
16use PVE::Cluster;
06208a01 17use PVE::Corosync;
7ca36671 18use PVE::Exception qw(raise raise_param_exc);
0fd61594 19use PVE::INotify;
e74a87f5 20use PVE::JSONSchema qw(register_standard_option get_standard_option);
2e1ae6b9 21use PVE::Network;
0fd61594 22use PVE::ProcFSTools;
eedcb564 23use PVE::SafeSyslog;
0fd61594 24use PVE::Tools qw($IPV4RE $IPV6RE);
1a301a8d 25use PVE::Tools qw(run_command lock_file dir_glob_foreach);
ecbea048 26
21053409
DM		 27my $pvefw_conf_dir = "/etc/pve/firewall";
28my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
fca39c2c 29
fdefeeab 30# dynamically include PVE::QemuServer and PVE::LXC
d9fee004
DM		 31# to avoid dependency problems
32my $have_qemu_server;
33eval {
34 require PVE::QemuServer;
b5a16dd3 35 require PVE::QemuConfig;
d9fee004
DM		 36 $have_qemu_server = 1;
37};
38
3b4882dc
AG		 39my $have_lxc;
40eval {
41 require PVE::LXC;
42 $have_lxc = 1;
43};
44
259db1e6
DM		 45my $pve_fw_status_dir = "/var/lib/pve-firewall";
46
47mkdir $pve_fw_status_dir; # make sure this exists
48
351052d1
DM		 49my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
f9792937 51our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
351052d1
DM		 52
53my $max_alias_name_length = 64;
54my $max_ipset_name_length = 64;
5c53cde4 55my $max_group_name_length = 18;
351052d1 56
48e3963e
WB		 57my $PROTOCOLS_WITH_PORTS = {
58 udp => 1, 17 => 1,
59 udplite => 1, 136 => 1,
60 tcp => 1, 6 => 1,
61 dccp => 1, 33 => 1,
62 sctp => 1, 132 => 1,
63};
64
ae029a88
DM		 65PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
66sub pve_verify_ip_or_cidr {
009ee3ac
DM		 67 my ($cidr, $noerr) = @_;
68
70e524eb 69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
e34d0e58 70 return $cidr if Net::IP->new($cidr);
7c619bbb
DM		 71 return undef if $noerr;
72 die Net::IP::Error() . "\n";
73 }
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
76}
77
ae029a88
DM		 78PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
79sub pve_verify_ip_or_cidr_or_alias {
7c619bbb
DM		 80 my ($cidr, $noerr) = @_;
81
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
83
ae029a88 84 return pve_verify_ip_or_cidr($cidr, $noerr);
009ee3ac
DM		 85}
86
e74a87f5
DM		 87PVE::JSONSchema::register_standard_option('ipset-name', {
88 description => "IP set name.",
89 type => 'string',
351052d1 90 pattern => $ipset_name_pattern,
387d0ffc 91 minLength => 2,
351052d1 92 maxLength => $max_ipset_name_length,
387d0ffc
DM		 93});
94
81d574a7
DM		 95PVE::JSONSchema::register_standard_option('pve-fw-alias', {
96 description => "Alias name.",
97 type => 'string',
351052d1 98 pattern => $ip_alias_pattern,
81d574a7 99 minLength => 2,
351052d1 100 maxLength => $max_alias_name_length,
81d574a7
DM		 101});
102
6302c41f
DM		 103PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
104 description => "Log level.",
e34d0e58 105 type => 'string',
6302c41f
DM		 106 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
107 optional => 1,
108});
109
387d0ffc
DM		 110PVE::JSONSchema::register_standard_option('pve-security-group-name', {
111 description => "Security Group name.",
112 type => 'string',
44be8ceb 113 pattern => $security_group_name_pattern,
387d0ffc 114 minLength => 2,
351052d1 115 maxLength => $max_group_name_length,
e74a87f5 116});
009ee3ac 117
cbb5d6f3
DM		 118my $feature_ipset_nomatch = 0;
119eval {
120 my (undef, undef, $release) = POSIX::uname();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
125 }
126
127};
128
c8301d63 129my $nodename = PVE::INotify::nodename();
c1f17287 130my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
c8301d63 131
06320eb0
DM		 132my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
133
56f313f7 134my $default_log_level = 'nolog'; # avoid logs by default
cc37e000
TL		 135my $global_log_ratelimit = '--limit 1/sec';
136
2d404ffc
DM		 137my $log_level_hash = {
138 debug => 7,
139 info => 6,
140 notice => 5,
141 warning => 4,
142 err => 3,
143 crit => 2,
144 alert => 1,
145 emerg => 0,
146};
147
40af93c4
TL		 148my $verbose = 0;
149sub set_verbose {
150 $verbose = shift;
151}
152
044409e5
TW		 153# %rule
154#
155# name => optional
30c390f9 156# enable => [0|1]
044409e5
TW		 157# action =>
158# proto =>
30c390f9
TW		 159# sport => port[,port[,port]].. or port:port
160# dport => port[,port[,port]].. or port:port
044409e5
TW		 161# log => optional, loglevel
162# logmsg => optional, logmsg - overwrites default
30c390f9
TW		 163# iface_in => incomin interface
164# iface_out => outgoing interface
044409e5
TW		 165# match => optional, overwrites generation of match
166# target => optional, overwrites action
167
35d1d6da
DM		 168# we need to overwrite some macros for ipv6
169my $pve_ipv6fw_macros = {
170 'Ping' => [
171 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
172 ],
b3d75afb
WB		 173 'NeighborDiscovery' => [
174 "IPv6 neighbor solicitation, neighbor and router advertisement",
c71cdd44 175 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
b3d75afb
WB		 176 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
177 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
178 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
179 ],
a42e9763 180 'DHCPv6' => [
24dd51c2 181 "DHCPv6 traffic",
a42e9763
WB		 182 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
183 ],
35d1d6da
DM		 184 'Trcrt' => [
185 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
186 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
187 ],
188 };
189
857f62c8 190# imported/converted from: /usr/share/shorewall/macro.*
961b4928 191my $pve_fw_macros = {
857f62c8 192 'Amanda' => [
ebd54ae9 193 "Amanda Backup",
857f62c8
DM		 194 { action => 'PARAM', proto => 'udp', dport => '10080' },
195 { action => 'PARAM', proto => 'tcp', dport => '10080' },
196 ],
197 'Auth' => [
ebd54ae9 198 "Auth (identd) traffic",
857f62c8
DM		 199 { action => 'PARAM', proto => 'tcp', dport => '113' },
200 ],
201 'BGP' => [
ebd54ae9 202 "Border Gateway Protocol traffic",
857f62c8
DM		 203 { action => 'PARAM', proto => 'tcp', dport => '179' },
204 ],
205 'BitTorrent' => [
ebd54ae9 206 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 207 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 208 { action => 'PARAM', proto => 'udp', dport => '6881' },
209 ],
210 'BitTorrent32' => [
ebd54ae9 211 "BitTorrent traffic for BitTorrent 3.2 and later",
857f62c8
DM		 212 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
213 { action => 'PARAM', proto => 'udp', dport => '6881' },
214 ],
06ba9c44
AG		 215 'Ceph' => [
216 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
217 { action => 'PARAM', proto => 'tcp', dport => '6789' },
218 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
219 ],
857f62c8 220 'CVS' => [
ebd54ae9 221 "Concurrent Versions System pserver traffic",
857f62c8
DM		 222 { action => 'PARAM', proto => 'tcp', dport => '2401' },
223 ],
224 'Citrix' => [
ebd54ae9 225 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 226 { action => 'PARAM', proto => 'tcp', dport => '1494' },
227 { action => 'PARAM', proto => 'udp', dport => '1604' },
228 { action => 'PARAM', proto => 'tcp', dport => '2598' },
229 ],
230 'DAAP' => [
ebd54ae9 231 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 232 { action => 'PARAM', proto => 'tcp', dport => '3689' },
233 { action => 'PARAM', proto => 'udp', dport => '3689' },
234 ],
235 'DCC' => [
ebd54ae9 236 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 237 { action => 'PARAM', proto => 'tcp', dport => '6277' },
238 ],
239 'DHCPfwd' => [
d2c3266d 240 "Forwarded DHCP traffic",
857f62c8 241 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 242 ],
243 'DNS' => [
ebd54ae9 244 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 245 { action => 'PARAM', proto => 'udp', dport => '53' },
246 { action => 'PARAM', proto => 'tcp', dport => '53' },
247 ],
248 'Distcc' => [
ebd54ae9 249 "Distributed Compiler service",
857f62c8
DM		 250 { action => 'PARAM', proto => 'tcp', dport => '3632' },
251 ],
857f62c8 252 'FTP' => [
ebd54ae9 253 "File Transfer Protocol",
857f62c8
DM		 254 { action => 'PARAM', proto => 'tcp', dport => '21' },
255 ],
256 'Finger' => [
ebd54ae9 257 "Finger protocol (RFC 742)",
857f62c8
DM		 258 { action => 'PARAM', proto => 'tcp', dport => '79' },
259 ],
260 'GNUnet' => [
ebd54ae9 261 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 262 { action => 'PARAM', proto => 'tcp', dport => '2086' },
263 { action => 'PARAM', proto => 'udp', dport => '2086' },
264 { action => 'PARAM', proto => 'tcp', dport => '1080' },
265 { action => 'PARAM', proto => 'udp', dport => '1080' },
266 ],
267 'GRE' => [
d2c3266d 268 "Generic Routing Encapsulation tunneling protocol",
857f62c8 269 { action => 'PARAM', proto => '47' },
857f62c8
DM		 270 ],
271 'Git' => [
ebd54ae9 272 "Git distributed revision control traffic",
857f62c8
DM		 273 { action => 'PARAM', proto => 'tcp', dport => '9418' },
274 ],
857f62c8 275 'HKP' => [
ebd54ae9 276 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 277 { action => 'PARAM', proto => 'tcp', dport => '11371' },
278 ],
279 'HTTP' => [
ebd54ae9 280 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 281 { action => 'PARAM', proto => 'tcp', dport => '80' },
282 ],
857f62c8 283 'HTTPS' => [
ebd54ae9 284 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 285 { action => 'PARAM', proto => 'tcp', dport => '443' },
286 ],
287 'ICPV2' => [
ebd54ae9 288 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 289 { action => 'PARAM', proto => 'udp', dport => '3130' },
290 ],
291 'ICQ' => [
ebd54ae9 292 "AOL Instant Messenger traffic",
857f62c8
DM		 293 { action => 'PARAM', proto => 'tcp', dport => '5190' },
294 ],
295 'IMAP' => [
ebd54ae9 296 "Internet Message Access Protocol",
857f62c8
DM		 297 { action => 'PARAM', proto => 'tcp', dport => '143' },
298 ],
299 'IMAPS' => [
ebd54ae9 300 "Internet Message Access Protocol over SSL",
857f62c8
DM		 301 { action => 'PARAM', proto => 'tcp', dport => '993' },
302 ],
303 'IPIP' => [
d2c3266d 304 "IPIP capsulation traffic",
857f62c8 305 { action => 'PARAM', proto => '94' },
857f62c8 306 ],
857f62c8 307 'IPsec' => [
d2c3266d 308 "IPsec traffic",
857f62c8
DM		 309 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
310 { action => 'PARAM', proto => '50' },
857f62c8
DM		 311 ],
312 'IPsecah' => [
d2c3266d 313 "IPsec authentication (AH) traffic",
857f62c8
DM		 314 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
315 { action => 'PARAM', proto => '51' },
857f62c8
DM		 316 ],
317 'IPsecnat' => [
d2c3266d 318 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 319 { action => 'PARAM', proto => 'udp', dport => '500' },
320 { action => 'PARAM', proto => 'udp', dport => '4500' },
321 { action => 'PARAM', proto => '50' },
857f62c8
DM		 322 ],
323 'IRC' => [
ebd54ae9 324 "Internet Relay Chat traffic",
857f62c8
DM		 325 { action => 'PARAM', proto => 'tcp', dport => '6667' },
326 ],
857f62c8 327 'Jetdirect' => [
ebd54ae9 328 "HP Jetdirect printing",
857f62c8
DM		 329 { action => 'PARAM', proto => 'tcp', dport => '9100' },
330 ],
331 'L2TP' => [
ebd54ae9 332 "Layer 2 Tunneling Protocol traffic",
857f62c8 333 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 334 ],
335 'LDAP' => [
ebd54ae9 336 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 337 { action => 'PARAM', proto => 'tcp', dport => '389' },
338 ],
339 'LDAPS' => [
ebd54ae9 340 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 341 { action => 'PARAM', proto => 'tcp', dport => '636' },
342 ],
343 'MSNP' => [
ebd54ae9 344 "Microsoft Notification Protocol",
857f62c8
DM		 345 { action => 'PARAM', proto => 'tcp', dport => '1863' },
346 ],
347 'MSSQL' => [
ebd54ae9 348 "Microsoft SQL Server",
857f62c8
DM		 349 { action => 'PARAM', proto => 'tcp', dport => '1433' },
350 ],
351 'Mail' => [
ebd54ae9 352 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 353 { action => 'PARAM', proto => 'tcp', dport => '25' },
354 { action => 'PARAM', proto => 'tcp', dport => '465' },
355 { action => 'PARAM', proto => 'tcp', dport => '587' },
356 ],
7831e1e3
EK		 357 'MDNS' => [
358 "Multicast DNS",
359 { action => 'PARAM', proto => 'udp', dport => '5353' },
360 ],
857f62c8 361 'Munin' => [
ebd54ae9 362 "Munin networked resource monitoring traffic",
857f62c8
DM		 363 { action => 'PARAM', proto => 'tcp', dport => '4949' },
364 ],
365 'MySQL' => [
ebd54ae9 366 "MySQL server",
857f62c8
DM		 367 { action => 'PARAM', proto => 'tcp', dport => '3306' },
368 ],
369 'NNTP' => [
ebd54ae9 370 "NNTP traffic (Usenet).",
857f62c8
DM		 371 { action => 'PARAM', proto => 'tcp', dport => '119' },
372 ],
373 'NNTPS' => [
ebd54ae9 374 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 375 { action => 'PARAM', proto => 'tcp', dport => '563' },
376 ],
377 'NTP' => [
ebd54ae9 378 "Network Time Protocol (ntpd)",
857f62c8
DM		 379 { action => 'PARAM', proto => 'udp', dport => '123' },
380 ],
857f62c8 381 'OSPF' => [
ebd54ae9 382 "OSPF multicast traffic",
857f62c8
DM		 383 { action => 'PARAM', proto => '89' },
384 ],
385 'OpenVPN' => [
ebd54ae9 386 "OpenVPN traffic",
857f62c8
DM		 387 { action => 'PARAM', proto => 'udp', dport => '1194' },
388 ],
389 'PCA' => [
ebd54ae9 390 "Symantec PCAnywere (tm)",
857f62c8
DM		 391 { action => 'PARAM', proto => 'udp', dport => '5632' },
392 { action => 'PARAM', proto => 'tcp', dport => '5631' },
393 ],
394 'POP3' => [
ebd54ae9 395 "POP3 traffic",
857f62c8
DM		 396 { action => 'PARAM', proto => 'tcp', dport => '110' },
397 ],
398 'POP3S' => [
ebd54ae9 399 "Encrypted POP3 traffic",
857f62c8
DM		 400 { action => 'PARAM', proto => 'tcp', dport => '995' },
401 ],
402 'PPtP' => [
ebd54ae9 403 "Point-to-Point Tunneling Protocol",
857f62c8 404 { action => 'PARAM', proto => '47' },
857f62c8
DM		 405 { action => 'PARAM', proto => 'tcp', dport => '1723' },
406 ],
407 'Ping' => [
ebd54ae9 408 "ICMP echo request",
269d4f13 409 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 410 ],
411 'PostgreSQL' => [
ebd54ae9 412 "PostgreSQL server",
857f62c8
DM		 413 { action => 'PARAM', proto => 'tcp', dport => '5432' },
414 ],
415 'Printer' => [
ebd54ae9 416 "Line Printer protocol printing",
857f62c8
DM		 417 { action => 'PARAM', proto => 'tcp', dport => '515' },
418 ],
419 'RDP' => [
ebd54ae9 420 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 421 { action => 'PARAM', proto => 'tcp', dport => '3389' },
422 ],
d2c3266d 423 'RIP' => [
ebd54ae9 424 "Routing Information Protocol (bidirectional)",
857f62c8 425 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 426 ],
427 'RNDC' => [
ebd54ae9 428 "BIND remote management protocol",
857f62c8
DM		 429 { action => 'PARAM', proto => 'tcp', dport => '953' },
430 ],
431 'Razor' => [
ebd54ae9 432 "Razor Antispam System",
056f9211 433 { action => 'PARAM', proto => 'tcp', dport => '2703' },
857f62c8
DM		 434 ],
435 'Rdate' => [
ebd54ae9 436 "Remote time retrieval (rdate)",
857f62c8
DM		 437 { action => 'PARAM', proto => 'tcp', dport => '37' },
438 ],
439 'Rsync' => [
ebd54ae9 440 "Rsync server",
857f62c8
DM		 441 { action => 'PARAM', proto => 'tcp', dport => '873' },
442 ],
443 'SANE' => [
ebd54ae9 444 "SANE network scanning",
857f62c8
DM		 445 { action => 'PARAM', proto => 'tcp', dport => '6566' },
446 ],
447 'SMB' => [
ebd54ae9 448 "Microsoft SMB traffic",
857f62c8
DM		 449 { action => 'PARAM', proto => 'udp', dport => '135,445' },
450 { action => 'PARAM', proto => 'udp', dport => '137:139' },
451 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
452 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
453 ],
857f62c8 454 'SMBswat' => [
ebd54ae9 455 "Samba Web Administration Tool",
857f62c8
DM		 456 { action => 'PARAM', proto => 'tcp', dport => '901' },
457 ],
458 'SMTP' => [
ebd54ae9 459 "Simple Mail Transfer Protocol",
857f62c8
DM		 460 { action => 'PARAM', proto => 'tcp', dport => '25' },
461 ],
462 'SMTPS' => [
ebd54ae9 463 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 464 { action => 'PARAM', proto => 'tcp', dport => '465' },
465 ],
466 'SNMP' => [
ebd54ae9 467 "Simple Network Management Protocol",
857f62c8
DM		 468 { action => 'PARAM', proto => 'udp', dport => '161:162' },
469 { action => 'PARAM', proto => 'tcp', dport => '161' },
470 ],
471 'SPAMD' => [
ebd54ae9 472 "Spam Assassin SPAMD traffic",
857f62c8
DM		 473 { action => 'PARAM', proto => 'tcp', dport => '783' },
474 ],
475 'SSH' => [
ebd54ae9 476 "Secure shell traffic",
857f62c8
DM		 477 { action => 'PARAM', proto => 'tcp', dport => '22' },
478 ],
479 'SVN' => [
ebd54ae9 480 "Subversion server (svnserve)",
857f62c8
DM		 481 { action => 'PARAM', proto => 'tcp', dport => '3690' },
482 ],
483 'SixXS' => [
ebd54ae9 484 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 485 { action => 'PARAM', proto => 'tcp', dport => '3874' },
486 { action => 'PARAM', proto => 'udp', dport => '3740' },
487 { action => 'PARAM', proto => '41' },
488 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
489 ],
490 'Squid' => [
ebd54ae9 491 "Squid web proxy traffic",
857f62c8
DM		 492 { action => 'PARAM', proto => 'tcp', dport => '3128' },
493 ],
494 'Submission' => [
ebd54ae9 495 "Mail message submission traffic",
857f62c8
DM		 496 { action => 'PARAM', proto => 'tcp', dport => '587' },
497 ],
498 'Syslog' => [
ebd54ae9 499 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 500 { action => 'PARAM', proto => 'udp', dport => '514' },
501 { action => 'PARAM', proto => 'tcp', dport => '514' },
502 ],
503 'TFTP' => [
ebd54ae9 504 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 505 { action => 'PARAM', proto => 'udp', dport => '69' },
506 ],
507 'Telnet' => [
ebd54ae9 508 "Telnet traffic",
857f62c8
DM		 509 { action => 'PARAM', proto => 'tcp', dport => '23' },
510 ],
511 'Telnets' => [
ebd54ae9 512 "Telnet over SSL",
857f62c8
DM		 513 { action => 'PARAM', proto => 'tcp', dport => '992' },
514 ],
515 'Time' => [
ebd54ae9 516 "RFC 868 Time protocol",
857f62c8
DM		 517 { action => 'PARAM', proto => 'tcp', dport => '37' },
518 ],
519 'Trcrt' => [
ebd54ae9 520 "Traceroute (for up to 30 hops) traffic",
857f62c8 521 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 522 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 523 ],
524 'VNC' => [
93be4333
DM		 525 "VNC traffic for VNC display's 0 - 99",
526 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
857f62c8
DM		 527 ],
528 'VNCL' => [
ebd54ae9 529 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 530 { action => 'PARAM', proto => 'tcp', dport => '5500' },
531 ],
532 'Web' => [
ebd54ae9 533 "WWW traffic (HTTP and HTTPS)",
857f62c8 534 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 535 { action => 'PARAM', proto => 'tcp', dport => '443' },
536 ],
857f62c8 537 'Webcache' => [
ebd54ae9 538 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 539 { action => 'PARAM', proto => 'tcp', dport => '8080' },
540 ],
541 'Webmin' => [
ebd54ae9 542 "Webmin traffic",
857f62c8
DM		 543 { action => 'PARAM', proto => 'tcp', dport => '10000' },
544 ],
545 'Whois' => [
ebd54ae9 546 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 547 { action => 'PARAM', proto => 'tcp', dport => '43' },
548 ],
961b4928
DM		 549};
550
551my $pve_fw_parsed_macros;
ebd54ae9 552my $pve_fw_macro_descr;
21a18e53 553my $pve_fw_macro_ipversion = {};
961b4928 554my $pve_fw_preferred_macro_names = {};
3a616aa0 555
fe3d79b4
WB		 556my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
557my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
558
5547adf7 559my $pve_std_chains = {};
cfd7cd9c
TW		 560my $pve_std_chains_conf = {};
561$pve_std_chains_conf->{4} = {
d8f2505e 562 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 563 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
d8f2505e 564 ],
79929d9c
DM		 565 'PVEFW-DropBroadcast' => [
566 # same as shorewall 'Broadcast'
567 # simply DROP BROADCAST/MULTICAST/ANYCAST
568 # we can use this to reduce logging
569 { action => 'DROP', dsttype => 'BROADCAST' },
570 { action => 'DROP', dsttype => 'MULTICAST' },
571 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 572 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 573 ],
574 'PVEFW-reject' => [
575 # same as shorewall 'reject'
576 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 577 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c 578 { action => 'DROP', proto => 'icmp' },
044409e5
TW		 579 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
580 { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
581 { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
582 { target => '-j REJECT --reject-with icmp-host-prohibited' },
79929d9c
DM		 583 ],
584 'PVEFW-Drop' => [
cbb5d6f3 585 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 586 # but REJECT/DROP some packages to reduce logging,
587 # and ACCEPT critical ICMP types
588 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
589 # we are not interested in BROADCAST/MULTICAST/ANYCAST
590 { action => 'PVEFW-DropBroadcast' },
591 # ACCEPT critical ICMP types
592 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
593 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
594 # Drop packets with INVALID state
044409e5 595 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 596 # Drop Microsoft SMB noise
e4882cff
TW		 597 { action => 'DROP', proto => 'udp', dport => '135,445' },
598 { action => 'DROP', proto => 'udp', dport => '137:139' },
79929d9c 599 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 600 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 601 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
602 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 603 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 604 # Drop DNS replies
605 { action => 'DROP', proto => 'udp', sport => 53 },
606 ],
607 'PVEFW-Reject' => [
cbb5d6f3 608 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 609 # but REJECT/DROP some packages to reduce logging,
610 # and ACCEPT critical ICMP types
611 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
612 # we are not interested in BROADCAST/MULTICAST/ANYCAST
613 { action => 'PVEFW-DropBroadcast' },
614 # ACCEPT critical ICMP types
615 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
616 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
617 # Drop packets with INVALID state
044409e5 618 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 619 # Drop Microsoft SMB noise
e4882cff 620 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
79929d9c
DM		 621 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
622 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 623 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 624 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
625 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 626 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 627 # Drop DNS replies
628 { action => 'DROP', proto => 'udp', sport => 53 },
629 ],
d86659ef
DM		 630 'PVEFW-tcpflags' => [
631 # same as shorewall tcpflags action.
632 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
044409e5
TW		 633 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
634 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
635 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
636 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
637 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
d86659ef 638 ],
bee633ab
DM		 639 'PVEFW-smurfs' => [
640 # same as shorewall smurfs action
641 # Filter packets for smurfs (packets with a broadcast address as the source).
044409e5
TW		 642 { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
643 { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
644 { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
645 ],
646 'PVEFW-smurflog' => [
647 { action => 'DROP', logmsg => 'DROP: ' },
648 ],
649 'PVEFW-logflags' => [
650 { action => 'DROP', logmsg => 'DROP: ' },
bee633ab 651 ],
d8f2505e
DM		 652};
653
cfd7cd9c 654$pve_std_chains_conf->{6} = {
47a79ff2 655 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 656 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
47a79ff2
AD		 657 ],
658 'PVEFW-DropBroadcast' => [
044409e5
TW		 659 # same as shorewall 'Broadcast'
660 # simply DROP BROADCAST/MULTICAST/ANYCAST
661 # we can use this to reduce logging
662 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
649cd835
DM		 663 # ipv6 addrtype does not work with kernel 2.6.32
664 #{ action => 'DROP', dsttype => 'MULTICAST' },
044409e5
TW		 665 #{ action => 'DROP', dsttype => 'ANYCAST' },
666 { action => 'DROP', dest => 'ff00::/8' },
667 #{ action => 'DROP', dest => '224.0.0.0/4' },
47a79ff2
AD		 668 ],
669 'PVEFW-reject' => [
649cd835 670 { action => 'DROP', proto => 'icmpv6' },
044409e5 671 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
58ca8ec0
AD		 672 { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
673 { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
47a79ff2
AD		 674 ],
675 'PVEFW-Drop' => [
044409e5
TW		 676 # same as shorewall 'Drop', which is equal to DROP,
677 # but REJECT/DROP some packages to reduce logging,
678 # and ACCEPT critical ICMP types
649cd835 679 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
044409e5
TW		 680 # we are not interested in BROADCAST/MULTICAST/ANYCAST
681 { action => 'PVEFW-DropBroadcast' },
682 # ACCEPT critical ICMP types
683 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
684 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
685 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
686 # Drop packets with INVALID state
687 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
688 # Drop Microsoft SMB noise
e4882cff 689 { action => 'DROP', proto => 'udp', dport => '135,445' },
649cd835
DM		 690 { action => 'DROP', proto => 'udp', dport => '137:139'},
691 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 692 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
649cd835 693 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
044409e5
TW		 694 # Drop new/NotSyn traffic so that it doesn't get logged
695 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
696 # Drop DNS replies
649cd835 697 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 698 ],
699 'PVEFW-Reject' => [
044409e5
TW		 700 # same as shorewall 'Reject', which is equal to Reject,
701 # but REJECT/DROP some packages to reduce logging,
702 # and ACCEPT critical ICMP types
703 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
704 # we are not interested in BROADCAST/MULTICAST/ANYCAST
705 { action => 'PVEFW-DropBroadcast' },
706 # ACCEPT critical ICMP types
707 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
708 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
709 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
710 # Drop packets with INVALID state
711 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
712 # Drop Microsoft SMB noise
e4882cff
TW		 713 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
714 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
044409e5 715 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 716 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
044409e5
TW		 717 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
718 # Drop new/NotSyn traffic so that it doesn't get logged
719 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
720 # Drop DNS replies
721 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 722 ],
723 'PVEFW-tcpflags' => [
044409e5
TW		 724 # same as shorewall tcpflags action.
725 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
726 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
727 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
728 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
729 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
730 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
731 ],
732 'PVEFW-logflags' => [
733 { action => 'DROP', logmsg => 'DROP: ' },
47a79ff2 734 ],
47a79ff2
AD		 735};
736
4b586518
DM		 737# iptables -p icmp -h
738my $icmp_type_names = {
739 any => 1,
740 'echo-reply' => 1,
741 'destination-unreachable' => 1,
742 'network-unreachable' => 1,
743 'host-unreachable' => 1,
744 'protocol-unreachable' => 1,
745 'port-unreachable' => 1,
746 'fragmentation-needed' => 1,
747 'source-route-failed' => 1,
748 'network-unknown' => 1,
749 'host-unknown' => 1,
750 'network-prohibited' => 1,
751 'host-prohibited' => 1,
752 'TOS-network-unreachable' => 1,
753 'TOS-host-unreachable' => 1,
754 'communication-prohibited' => 1,
755 'host-precedence-violation' => 1,
756 'precedence-cutoff' => 1,
757 'source-quench' => 1,
758 'redirect' => 1,
759 'network-redirect' => 1,
760 'host-redirect' => 1,
761 'TOS-network-redirect' => 1,
762 'TOS-host-redirect' => 1,
763 'echo-request' => 1,
764 'router-advertisement' => 1,
765 'router-solicitation' => 1,
766 'time-exceeded' => 1,
767 'ttl-zero-during-transit' => 1,
768 'ttl-zero-during-reassembly' => 1,
769 'parameter-problem' => 1,
770 'ip-header-bad' => 1,
771 'required-option-missing' => 1,
772 'timestamp-request' => 1,
773 'timestamp-reply' => 1,
774 'address-mask-request' => 1,
775 'address-mask-reply' => 1,
776};
777
041b9277
DM		 778# ip6tables -p icmpv6 -h
779
780my $icmpv6_type_names = {
781 'any' => 1,
782 'destination-unreachable' => 1,
783 'no-route' => 1,
784 'communication-prohibited' => 1,
785 'address-unreachable' => 1,
786 'port-unreachable' => 1,
787 'packet-too-big' => 1,
788 'time-exceeded' => 1,
789 'ttl-zero-during-transit' => 1,
790 'ttl-zero-during-reassembly' => 1,
791 'parameter-problem' => 1,
792 'bad-header' => 1,
793 'unknown-header-type' => 1,
794 'unknown-option' => 1,
795 'echo-request' => 1,
796 'echo-reply' => 1,
797 'router-solicitation' => 1,
798 'router-advertisement' => 1,
593604cc 799 'neighbor-solicitation' => 1,
041b9277 800 'neighbour-solicitation' => 1,
593604cc 801 'neighbor-advertisement' => 1,
041b9277
DM		 802 'neighbour-advertisement' => 1,
803 'redirect' => 1,
804};
805
54cd19a8 806sub init_firewall_macros {
6158271d 807
961b4928 808 $pve_fw_parsed_macros = {};
9aab3127 809
21a18e53
WB		 810 my $parse = sub {
811 my ($k, $macro) = @_;
e5076eee 812 my $lc_name = lc($k);
21a18e53
WB		 813 $pve_fw_macro_ipversion->{$k} = 0;
814 while (!ref($macro->[0])) {
815 my $desc = shift @$macro;
816 if ($desc eq 'ipv4only') {
817 $pve_fw_macro_ipversion->{$k} = 4;
818 } elsif ($desc eq 'ipv6only') {
819 $pve_fw_macro_ipversion->{$k} = 6;
820 } else {
821 $pve_fw_macro_descr->{$k} = $desc;
822 }
ebd54ae9 823 }
e5076eee
DM		 824 $pve_fw_preferred_macro_names->{$lc_name} = $k;
825 $pve_fw_parsed_macros->{$k} = $macro;
21a18e53
WB		 826 };
827
828 foreach my $k (keys %$pve_fw_macros) {
829 &$parse($k, $pve_fw_macros->{$k});
830 }
831
832 foreach my $k (keys %$pve_ipv6fw_macros) {
833 next if $pve_fw_parsed_macros->{$k};
834 &$parse($k, $pve_ipv6fw_macros->{$k});
835 $pve_fw_macro_ipversion->{$k} = 6;
961b4928 836 }
9aab3127
DM		 837}
838
54cd19a8
DM		 839init_firewall_macros();
840
ebd54ae9
DM		 841sub get_macros {
842 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
843}
844
fcba0beb
DM		 845my $etc_services;
846
847sub get_etc_services {
848
849 return $etc_services if $etc_services;
850
851 my $filename = "/etc/services";
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 $services = {};
860
861 while (my $line = <$fh>) {
862 chomp ($line);
863 next if $line =~m/^#/;
864 next if ($line =~m/^\s*$/);
865
d50f24ea 866 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
fcba0beb 867 $services->{byid}->{$2}->{name} = $1;
35b66e9d 868 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 869 $services->{byid}->{$2}->{$3} = 1;
870 $services->{byname}->{$1} = $services->{byid}->{$2};
871 }
872 }
873
874 close($fh);
875
6158271d
DM		 876 $etc_services = $services;
877
3a616aa0 878
fcba0beb
DM		 879 return $etc_services;
880}
881
58bc569d
WB		 882sub parse_protocol_file {
883 my ($filename) = @_;
fcba0beb
DM		 884
885 my $fh = IO::File->new($filename, O_RDONLY);
886 if (!$fh) {
887 warn "unable to read '$filename' - $!\n";
888 return {};
889 }
890
891 my $protocols = {};
892
893 while (my $line = <$fh>) {
894 chomp ($line);
895 next if $line =~m/^#/;
896 next if ($line =~m/^\s*$/);
897
d6dd6e96 898 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
fcba0beb
DM		 899 $protocols->{byid}->{$2}->{name} = $1;
900 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
901 }
902 }
903
904 close($fh);
905
58bc569d
WB		 906 return $protocols;
907}
908
909my $etc_protocols;
910
911sub get_etc_protocols {
912 return $etc_protocols if $etc_protocols;
913
914 my $protocols = parse_protocol_file('/etc/protocols');
915
041b9277
DM		 916 # add special case for ICMP v6
917 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
918 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
919
fcba0beb
DM		 920 $etc_protocols = $protocols;
921
922 return $etc_protocols;
923}
924
b452ea10
WB		 925my $etc_ethertypes;
926
927sub get_etc_ethertypes {
928 $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
929 if !$etc_ethertypes;
930 return $etc_ethertypes;
931}
932
525778d7 933my $__local_network;
93be4333 934
525778d7 935sub local_network {
ac633d30 936 my ($new_value) = @_;
93be4333 937
525778d7 938 $__local_network = $new_value if defined($new_value);
ac633d30 939
525778d7 940 return $__local_network if defined($__local_network);
93be4333
DM		 941
942 eval {
943 my $nodename = PVE::INotify::nodename();
944
945 my $ip = PVE::Cluster::remote_node_ip($nodename);
946
947 my $testip = Net::IP->new($ip);
bfc488f6 948
5dc356af
WB		 949 my $isv6 = $testip->version == 6;
950 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
951 : PVE::ProcFSTools::read_proc_net_route();
93be4333 952 foreach my $entry (@$routes) {
5dc356af
WB		 953 my $mask;
954 if ($isv6) {
955 $mask = $entry->{prefix};
15c80000 956 next if !$mask; # skip the default route...
5dc356af 957 } else {
2e1ae6b9 958 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
5dc356af
WB		 959 next if !defined($mask);
960 }
93be4333
DM		 961 my $cidr = "$entry->{dest}/$mask";
962 my $testnet = Net::IP->new($cidr);
15c80000
WB		 963 my $overlap = $testnet->overlaps($testip);
964 if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
965 $overlap == $Net::IP::IP_IDENTICAL)
966 {
525778d7 967 $__local_network = $cidr;
93be4333
DM		 968 return;
969 }
970 }
971 };
972 warn $@ if $@;
973
525778d7 974 return $__local_network;
93be4333
DM		 975}
976
6d959e3f
DM		 977# ipset names are limited to 31 characters,
978# and we use '-v4' or '-v6' to indicate IP versions,
979# and we use '_swap' suffix for atomic update,
980# for example PVEFW-${VMID}-${ipset_name}_swap
30150dca 981
88c26d5e 982my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
708ba714
DM		 983
984sub compute_ipset_chain_name {
88c26d5e 985 my ($vmid, $ipset_name, $ipversion) = @_;
708ba714
DM		 986
987 $vmid = 0 if !defined($vmid);
988
88c26d5e 989 my $id = "$vmid-${ipset_name}-v$ipversion";
708ba714 990
88c26d5e 991 if (length($id) > $max_iptables_ipset_name_length) {
708ba714
DM		 992 $id = PVE::Tools::fnv31a_hex($id);
993 }
994
995 return "PVEFW-$id";
996}
997
b692f42c
DM		 998sub compute_ipfilter_ipset_name {
999 my ($iface) = @_;
1000
1001 return "ipfilter-$iface";
1002}
1003
ecbea048
DM		 1004sub parse_address_list {
1005 my ($str) = @_;
1006
e2c62733
DM		 1007 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1008 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1009 return;
1010 }
1011
1012 if ($str =~ m/^${ip_alias_pattern}$/) {
1013 die "alias name too long\n" if length($str) > $max_alias_name_length;
1014 return;
1015 }
d72beb8e 1016
3162af6b
DM		 1017 my $count = 0;
1018 my $iprange = 0;
a589b6ac 1019 my $ipversion;
7697c041 1020
55b47371
WB		 1021 my @elements = split(/,/, $str);
1022 die "extraneous commas in list\n" if $str ne join(',', @elements);
1023 foreach my $elem (@elements) {
3162af6b 1024 $count++;
c344e509
DM		 1025 my $ip = Net::IP->new($elem);
1026 if (!$ip) {
ecbea048
DM		 1027 my $err = Net::IP::Error();
1028 die "invalid IP address: $err\n";
1029 }
3162af6b 1030 $iprange = 1 if $elem =~ m/-/;
a589b6ac 1031
c344e509 1032 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
a589b6ac
DM		 1033
1034 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
006490cb 1035 if $ipversion && ($new_ipversion != $ipversion);
a589b6ac
DM		 1036
1037 $ipversion = $new_ipversion;
ecbea048 1038 }
e34d0e58 1039
5163367b 1040 die "you can't use a range in a list\n" if $iprange && $count > 1;
a589b6ac 1041
7697c041 1042 return $ipversion;
ecbea048 1043}
dddd9413 1044
fcba0beb 1045sub parse_port_name_number_or_range {
a1c04f71 1046 my ($str, $dport) = @_;
fcba0beb
DM		 1047
1048 my $services = PVE::Firewall::get_etc_services();
7ca36671 1049 my $count = 0;
041b7e8e
DM		 1050 my $icmp_port = 0;
1051
55b47371
WB		 1052 my @elements = split(/,/, $str);
1053 die "extraneous commas in list\n" if $str ne join(',', @elements);
1054 foreach my $item (@elements) {
aced7e7d 1055 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
6a241ca7 1056 $count += 2;
7ca36671
DM		 1057 my ($port1, $port2) = ($1, $2);
1058 die "invalid port '$port1'\n" if $port1 > 65535;
1059 die "invalid port '$port2'\n" if $port2 > 65535;
12be0dfe 1060 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
aced7e7d 1061 } elsif ($item =~ m/^([0-9]+)$/) {
6a241ca7 1062 $count += 1;
7ca36671
DM		 1063 my $port = $1;
1064 die "invalid port '$port'\n" if $port > 65535;
1065 } else {
a1c04f71 1066 if ($dport && $icmp_type_names->{$item}) {
041b7e8e 1067 $icmp_port = 1;
a1c04f71 1068 } elsif ($dport && $icmpv6_type_names->{$item}) {
041b9277 1069 $icmp_port = 1;
041b7e8e 1070 } else {
e34d0e58 1071 die "invalid port '$item'\n" if !$services->{byname}->{$item};
041b7e8e 1072 }
fcba0beb
DM		 1073 }
1074 }
1075
6a241ca7
WB		 1076 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1077
1078 # I really don't like to use the word number here, but it's the only thing
1079 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1080 # one and not as 100...
1081 die "too many entries in port list (> 15 numbers)\n"
1082 if $count > 15;
041b7e8e 1083
f776d6de 1084 return (scalar(@elements) > 1);
fcba0beb
DM		 1085}
1086
a1c04f71
WB		 1087PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1088sub pve_fw_verify_sport_spec {
1089 my ($portstr) = @_;
1090
1091 parse_port_name_number_or_range($portstr, 0);
1092
1093 return $portstr;
1094}
1095
1096PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1097sub pve_fw_verify_dport_spec {
54cd19a8
DM		 1098 my ($portstr) = @_;
1099
a1c04f71 1100 parse_port_name_number_or_range($portstr, 1);
54cd19a8
DM		 1101
1102 return $portstr;
1103}
1104
d31689ee
DM		 1105PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1106sub pve_fw_verify_addr_spec {
54cd19a8
DM		 1107 my ($list) = @_;
1108
1109 parse_address_list($list);
1110
1111 return $list;
1112}
1113
1114PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1115sub pve_fw_verify_protocol_spec {
1116 my ($proto) = @_;
1117
1118 my $protocols = get_etc_protocols();
1119
1120 die "unknown protocol '$proto'\n" if $proto &&
1121 !(defined($protocols->{byname}->{$proto}) ||
1122 defined($protocols->{byid}->{$proto}));
1123
1124 return $proto;
1125}
1126
1127
d1c53b3e 1128# helper function for API
d1c53b3e 1129
5d38d64f
DM		 1130sub copy_opject_with_digest {
1131 my ($object) = @_;
1132
1133 my $sha = Digest::SHA->new('sha1');
1134
1135 my $res = {};
1136 foreach my $k (sort keys %$object) {
1137 my $v = $object->{$k};
0365eb68 1138 next if !defined($v);
5d38d64f
DM		 1139 $res->{$k} = $v;
1140 $sha->add($k, ':', $v, "\n");
1141 }
1142
55e686c7 1143 my $digest = $sha->hexdigest;
5d38d64f
DM		 1144
1145 $res->{digest} = $digest;
1146
1147 return wantarray ? ($res, $digest) : $res;
1148}
1149
1150sub copy_list_with_digest {
1151 my ($list) = @_;
1152
1153 my $sha = Digest::SHA->new('sha1');
1154
1155 my $res = [];
1156 foreach my $entry (@$list) {
1157 my $data = {};
1158 foreach my $k (sort keys %$entry) {
1159 my $v = $entry->{$k};
0365eb68 1160 next if !defined($v);
5d38d64f 1161 $data->{$k} = $v;
6d9246e7 1162 # Note: digest ignores refs ($rule->{errors})
e83f0d00
DC		 1163 # since Digest::SHA expects a series of bytes,
1164 # we have to encode the value here to prevent errors when
1165 # using utf8 characters (eg. in comments)
1166 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
5d38d64f
DM		 1167 }
1168 push @$res, $data;
1169 }
1170
55e686c7 1171 my $digest = $sha->hexdigest;
5d38d64f
DM		 1172
1173 foreach my $entry (@$res) {
1174 $entry->{digest} = $digest;
1175 }
1176
1177 return wantarray ? ($res, $digest) : $res;
1178}
1179
e313afe0
DM		 1180our $cluster_option_properties = {
1181 enable => {
1182 description => "Enable or disable the firewall cluster wide.",
1183 type => 'integer',
1184 minimum => 0,
1185 optional => 1,
1186 },
2549e7ef
SI		 1187 ebtables => {
1188 description => "Enable ebtables rules cluster wide.",
1189 type => 'boolean',
1190 default => 1,
1191 optional => 1,
1192 },
e313afe0
DM		 1193 policy_in => {
1194 description => "Input policy.",
1195 type => 'string',
1196 optional => 1,
1197 enum => ['ACCEPT', 'REJECT', 'DROP'],
1198 },
1199 policy_out => {
1200 description => "Output policy.",
1201 type => 'string',
1202 optional => 1,
1203 enum => ['ACCEPT', 'REJECT', 'DROP'],
1204 },
cc37e000
TL		 1205 log_ratelimit => {
1206 description => "Log ratelimiting settings",
1207 type => 'string', format => {
1208 enable => {
1209 default_key => 1,
1210 description => 'Enable or disable log rate limiting',
1211 type => 'boolean',
1212 default => '1',
1213 },
1214 rate => {
1215 type => 'string',
1216 description => 'Frequency with which the burst bucket gets refilled',
1217 optional => 1,
1218 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1219 format_description => 'rate',
1220 default => '1/second',
1221 },
1222 burst => {
1223 type => 'integer',
1224 minimum => 0,
1225 optional => 1,
1226 description => 'Inital burst of packages which will get logged',
1227 default => 5,
1228 },
1229 },
1230 optional => 1,
1231 },
e313afe0
DM		 1232};
1233
1234our $host_option_properties = {
1235 enable => {
1236 description => "Enable host firewall rules.",
1237 type => 'boolean',
1238 optional => 1,
1239 },
1240 log_level_in => get_standard_option('pve-fw-loglevel', {
1241 description => "Log level for incoming traffic." }),
1242 log_level_out => get_standard_option('pve-fw-loglevel', {
1243 description => "Log level for outgoing traffic." }),
1244 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1245 description => "Log level for illegal tcp flags filter." }),
1246 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1247 description => "Log level for SMURFS filter." }),
1248 nosmurfs => {
1249 description => "Enable SMURFS filter.",
1250 type => 'boolean',
1251 optional => 1,
1252 },
1253 tcpflags => {
1254 description => "Filter illegal combinations of TCP flags.",
1255 type => 'boolean',
1256 optional => 1,
1257 },
1258 nf_conntrack_max => {
1259 description => "Maximum number of tracked connections.",
1260 type => 'integer',
1261 optional => 1,
1262 minimum => 32768,
1263 },
1264 nf_conntrack_tcp_timeout_established => {
1265 description => "Conntrack established timeout.",
1266 type => 'integer',
1267 optional => 1,
1268 minimum => 7875,
1269 },
1270 ndp => {
1271 description => "Enable NDP.",
1272 type => 'boolean',
1273 optional => 1,
1274 },
27c49e25
CE		 1275 nf_conntrack_allow_invalid => {
1276 description => "Allow invalid packets on connection tracking.",
1277 type => 'boolean',
1278 default => 0,
1279 optional => 1,
1280 },
e17d3eec
ML		 1281 log_nf_conntrack => {
1282 description => "Enable logging of conntrack information.",
1283 type => 'boolean',
1284 default => 0,
1285 optional => 1
1286 },
e313afe0
DM		 1287};
1288
1289our $vm_option_properties = {
1290 enable => {
1291 description => "Enable/disable firewall rules.",
1292 type => 'boolean',
1293 optional => 1,
1294 },
1295 macfilter => {
1296 description => "Enable/disable MAC address filter.",
1297 type => 'boolean',
1298 optional => 1,
1299 },
1300 dhcp => {
1301 description => "Enable DHCP.",
1302 type => 'boolean',
1303 optional => 1,
1304 },
1305 ndp => {
1306 description => "Enable NDP.",
1307 type => 'boolean',
1308 optional => 1,
1309 },
1310 radv => {
1311 description => "Allow sending Router Advertisement.",
1312 type => 'boolean',
1313 optional => 1,
1314 },
1315 ipfilter => {
1316 description => "Enable default IP filters. " .
1317 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1318 "for every interface. Such ipsets implicitly contain sane default " .
1319 "restrictions such as restricting IPv6 link local addresses to " .
1320 "the one derived from the interface's MAC address. For containers " .
1321 "the configured IP addresses will be implicitly added.",
1322 type => 'boolean',
1323 optional => 1,
1324 },
1325 policy_in => {
1326 description => "Input policy.",
1327 type => 'string',
1328 optional => 1,
1329 enum => ['ACCEPT', 'REJECT', 'DROP'],
1330 },
1331 policy_out => {
1332 description => "Output policy.",
1333 type => 'string',
1334 optional => 1,
1335 enum => ['ACCEPT', 'REJECT', 'DROP'],
1336 },
1337 log_level_in => get_standard_option('pve-fw-loglevel', {
1338 description => "Log level for incoming traffic." }),
1339 log_level_out => get_standard_option('pve-fw-loglevel', {
1340 description => "Log level for outgoing traffic." }),
1341
1342};
1343
fb060a52 1344
7a332151 1345my $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 1346
7a332151 1347my $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 1348
9c7e0858
DM		 1349my $rule_properties = {
1350 pos => {
1351 description => "Update rule at position <pos>.",
1352 type => 'integer',
1353 minimum => 0,
1354 optional => 1,
1355 },
c71e785f 1356 digest => get_standard_option('pve-config-digest'),
9c7e0858 1357 type => {
e50429af 1358 description => "Rule type.",
9c7e0858
DM		 1359 type => 'string',
1360 optional => 1,
1361 enum => ['in', 'out', 'group'],
1362 },
1363 action => {
c14dacdf 1364 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
9c7e0858
DM		 1365 type => 'string',
1366 optional => 1,
44be8ceb 1367 pattern => $security_group_name_pattern,
c14dacdf
DM		 1368 maxLength => 20,
1369 minLength => 2,
9c7e0858 1370 },
e5076eee 1371 macro => {
e50429af 1372 description => "Use predefined standard macro.",
e5076eee
DM		 1373 type => 'string',
1374 optional => 1,
54cd19a8 1375 maxLength => 128,
e5076eee 1376 },
fb060a52 1377 iface => get_standard_option('pve-iface', {
7ccaa5f1 1378 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		 1379 optional => 1
1380 }),
9c7e0858 1381 source => {
fb060a52 1382 description => "Restrict packet source address. $addr_list_descr",
d31689ee 1383 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1384 optional => 1,
1385 },
1386 dest => {
fb060a52 1387 description => "Restrict packet destination address. $addr_list_descr",
d31689ee 1388 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1389 optional => 1,
1390 },
1391 proto => {
fb060a52 1392 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
54cd19a8 1393 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 1394 optional => 1,
1395 },
1396 enable => {
e50429af 1397 description => "Flag to enable/disable a rule.",
72d055fc
AG		 1398 type => 'integer',
1399 minimum => 0,
9c7e0858
DM		 1400 optional => 1,
1401 },
3489f8a2
CE		 1402 log => get_standard_option('pve-fw-loglevel', {
1403 description => "Log level for firewall rule.",
1404 }),
9c7e0858 1405 sport => {
fb060a52 1406 description => "Restrict TCP/UDP source port. $port_descr",
a1c04f71 1407 type => 'string', format => 'pve-fw-sport-spec',
9c7e0858
DM		 1408 optional => 1,
1409 },
1410 dport => {
fb060a52 1411 description => "Restrict TCP/UDP destination port. $port_descr",
a1c04f71 1412 type => 'string', format => 'pve-fw-dport-spec',
9c7e0858
DM		 1413 optional => 1,
1414 },
1415 comment => {
e50429af 1416 description => "Descriptive comment.",
9c7e0858
DM		 1417 type => 'string',
1418 optional => 1,
1419 },
1420};
1421
1422sub add_rule_properties {
1423 my ($properties) = @_;
1424
1425 foreach my $k (keys %$rule_properties) {
3655b01f
DM		 1426 my $h = $rule_properties->{$k};
1427 # copy data, so that we can modify later without side effects
1428 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 1429 }
cbb5d6f3 1430
9c7e0858
DM		 1431 return $properties;
1432}
1433
5b7974df
DM		 1434sub delete_rule_properties {
1435 my ($rule, $delete_str) = @_;
e34d0e58 1436
5b7974df
DM		 1437 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1438 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1439 if !defined($rule_properties->{$opt});
1440 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1441 if $opt eq 'type' || $opt eq 'action';
1442 delete $rule->{$opt};
1443 }
1444
1445 return $rule;
1446}
1447
9a2745a0 1448my $apply_macro = sub {
35d1d6da 1449 my ($macro_name, $param, $verify, $ipversion) = @_;
9a2745a0
DM		 1450
1451 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1452 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1453
35d1d6da
DM		 1454 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1455 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1456 }
1457
21a18e53 1458 # skip macros which are specific to another ipversion
ff5d050e
AG		 1459 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1460 return if $ipversion != $required;
1461 }
21a18e53 1462
9a2745a0
DM		 1463 my $rules = [];
1464
1465 foreach my $templ (@$macro_rules) {
1466 my $rule = {};
1467 my $param_used = {};
1468 foreach my $k (keys %$templ) {
1469 my $v = $templ->{$k};
1470 if ($v eq 'PARAM') {
1471 $v = $param->{$k};
1472 $param_used->{$k} = 1;
1473 } elsif ($v eq 'DEST') {
1474 $v = $param->{dest};
1475 $param_used->{dest} = 1;
1476 } elsif ($v eq 'SOURCE') {
1477 $v = $param->{source};
1478 $param_used->{source} = 1;
1479 }
1480
1481 if (!defined($v)) {
1482 my $msg = "missing parameter '$k' in macro '$macro_name'";
e34d0e58 1483 raise_param_exc({ macro => $msg }) if $verify;
9a2745a0
DM		 1484 die "$msg\n";
1485 }
1486 $rule->{$k} = $v;
1487 }
1488 foreach my $k (keys %$param) {
1489 next if $k eq 'macro';
1490 next if !defined($param->{$k});
1491 next if $param_used->{$k};
1492 if (defined($rule->{$k})) {
1493 if ($rule->{$k} ne $param->{$k}) {
1494 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
e34d0e58 1495 raise_param_exc({ $k => $msg }) if $verify;
9a2745a0
DM		 1496 die "$msg\n";
1497 }
1498 } else {
1499 $rule->{$k} = $param->{$k};
1500 }
1501 }
1502 push @$rules, $rule;
1503 }
1504
1505 return $rules;
1506};
1507
b6b8e6ad
DM		 1508my $rule_env_iface_lookup = {
1509 'ct' => 1,
1510 'vm' => 1,
1511 'group' => 0,
1512 'cluster' => 1,
1513 'host' => 1,
1514};
1515
7ca36671 1516sub verify_rule {
a523e057 1517 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
b6b8e6ad
DM		 1518
1519 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
bfc488f6 1520
b6b8e6ad
DM		 1521 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1522 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
7ca36671 1523
a523e057
DM		 1524 my $errors = $rule->{errors} || {};
1525
6d9246e7 1526 my $error_count = 0;
7ca36671 1527
6d9246e7
DM		 1528 my $add_error = sub {
1529 my ($param, $msg) = @_;
d4cda423 1530 chomp $msg;
6d9246e7
DM		 1531 raise_param_exc({ $param => $msg }) if !$noerr;
1532 $error_count++;
1533 $errors->{$param} = $msg if !$errors->{$param};
1534 };
1535
eea9d2a1
DM		 1536 my $ipversion;
1537 my $set_ip_version = sub {
1538 my $vers = shift;
1539 if ($vers) {
1540 die "detected mixed ipv4/ipv6 adresses in rule\n"
1541 if $ipversion && ($vers != $ipversion);
1542 $ipversion = $vers;
1543 }
1544 };
1545
a523e057 1546 my $check_ipset_or_alias_property = sub {
ae029a88 1547 my ($name, $expected_ipversion) = @_;
a523e057
DM		 1548
1549 if (my $value = $rule->{$name}) {
1550 if ($value =~ m/^\+/) {
4dfe04e6 1551 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
bfc488f6 1552 &$add_error($name, "no such ipset '$1'")
a523e057 1553 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
bfc488f6 1554
a523e057 1555 } else {
351052d1 1556 &$add_error($name, "invalid ipset name '$value'");
a523e057
DM		 1557 }
1558 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1559 my $alias = lc($value);
bfc488f6 1560 &$add_error($name, "no such alias '$value'")
70e524eb 1561 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
04f5088f 1562 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
70e524eb
AD		 1563 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1564
eea9d2a1 1565 &$set_ip_version($e->{ipversion});
a523e057
DM		 1566 }
1567 }
1568 };
1569
6d9246e7
DM		 1570 my $type = $rule->{type};
1571 my $action = $rule->{action};
bfc488f6 1572
6d9246e7
DM		 1573 &$add_error('type', "missing property") if !$type;
1574 &$add_error('action', "missing property") if !$action;
1575
1576 if ($type) {
1577 if ($type eq 'in' || $type eq 'out') {
1578 &$add_error('action', "unknown action '$action'")
1579 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1580 } elsif ($type eq 'group') {
1581 &$add_error('type', "security groups not allowed")
1582 if !$allow_groups;
1583 &$add_error('action', "invalid characters in security group name")
1584 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1585 } else {
1586 &$add_error('type', "unknown rule type '$type'");
1587 }
7ca36671 1588 }
e34d0e58 1589
dba740a9 1590 if ($rule->{iface}) {
bfc488f6 1591 &$add_error('type', "parameter -i not allowed for this rule type")
b6b8e6ad 1592 if !$allow_iface;
dba740a9 1593 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
6d9246e7 1594 &$add_error('iface', $@) if $@;
fdefeeab 1595 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
b6b8e6ad
DM		 1596 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1597 if $rule->{iface} !~ m/^net(\d+)$/;
b6b8e6ad
DM		 1598 }
1599 }
7ca36671
DM		 1600
1601 if ($rule->{macro}) {
6d9246e7
DM		 1602 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1603 $rule->{macro} = $preferred_name;
1604 } else {
1605 &$add_error('macro', "unknown macro '$rule->{macro}'");
1606 }
1607 }
1608
1609 if ($rule->{proto}) {
1610 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1611 &$add_error('proto', $@) if $@;
041b9277
DM		 1612 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1613 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
6d9246e7 1614 }
7ca36671
DM		 1615
1616 if ($rule->{dport}) {
a1c04f71 1617 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
6d9246e7 1618 &$add_error('dport', $@) if $@;
48e3963e 1619 my $proto = $rule->{proto};
6d9246e7 1620 &$add_error('proto', "missing property - 'dport' requires this property")
48e3963e
WB		 1621 if !$proto;
1622 &$add_error('dport', "protocol '$proto' does not support ports")
1623 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1624 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
6d9246e7 1625 }
7ca36671
DM		 1626
1627 if ($rule->{sport}) {
a1c04f71 1628 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
6d9246e7 1629 &$add_error('sport', $@) if $@;
48e3963e 1630 my $proto = $rule->{proto};
6d9246e7 1631 &$add_error('proto', "missing property - 'sport' requires this property")
48e3963e
WB		 1632 if !$proto;
1633 &$add_error('sport', "protocol '$proto' does not support ports")
1634 if !$PROTOCOLS_WITH_PORTS->{$proto};
7ca36671
DM		 1635 }
1636
1637 if ($rule->{source}) {
041b9277
DM		 1638 eval {
1639 my $source_ipversion = parse_address_list($rule->{source});
1640 &$set_ip_version($source_ipversion);
1641 };
6d9246e7 1642 &$add_error('source', $@) if $@;
ae029a88 1643 &$check_ipset_or_alias_property('source', $ipversion);
7ca36671
DM		 1644 }
1645
1646 if ($rule->{dest}) {
9e2205e5
DM		 1647 eval {
1648 my $dest_ipversion = parse_address_list($rule->{dest});
041b9277 1649 &$set_ip_version($dest_ipversion);
9e2205e5 1650 };
6d9246e7 1651 &$add_error('dest', $@) if $@;
ae029a88 1652 &$check_ipset_or_alias_property('dest', $ipversion);
7ca36671
DM		 1653 }
1654
35d1d6da
DM		 1655 $rule->{ipversion} = $ipversion if $ipversion;
1656
a523e057 1657 if ($rule->{macro} && !$error_count) {
35d1d6da 1658 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
6d9246e7
DM		 1659 if (my $err = $@) {
1660 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1661 my $eh = $err->{errors};
1662 foreach my $p (keys %$eh) {
1663 &$add_error($p, $eh->{$p});
1664 }
1665 } else {
1666 &$add_error('macro', "$err");
1667 }
1668 }
9a2745a0
DM		 1669 }
1670
6d9246e7
DM		 1671 $rule->{errors} = $errors if $error_count;
1672
7ca36671
DM		 1673 return $rule;
1674}
1675
9c7e0858
DM		 1676sub copy_rule_data {
1677 my ($rule, $param) = @_;
1678
1679 foreach my $k (keys %$rule_properties) {
1680 if (defined(my $v = $param->{$k})) {
1681 if ($v eq '' || $v eq '-') {
1682 delete $rule->{$k};
1683 } else {
1684 $rule->{$k} = $v;
1685 }
9c7e0858
DM		 1686 }
1687 }
7ca36671 1688
9c7e0858
DM		 1689 return $rule;
1690}
1691
9f6845cf
DM		 1692sub rules_modify_permissions {
1693 my ($rule_env) = @_;
1694
1695 if ($rule_env eq 'host') {
1696 return {
1697 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1698 };
1699 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1700 return {
1701 check => ['perm', '/', [ 'Sys.Modify' ]],
1702 };
3b4882dc 1703 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1704 return {
1705 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1706 }
1707 }
1708
1709 return undef;
1710}
1711
1712sub rules_audit_permissions {
1713 my ($rule_env) = @_;
1714
1715 if ($rule_env eq 'host') {
1716 return {
1717 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1718 };
1719 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1720 return {
1721 check => ['perm', '/', [ 'Sys.Audit' ]],
1722 };
3b4882dc 1723 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1724 return {
1725 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1726 }
1727 }
1728
1729 return undef;
1730}
1731
9c7e0858 1732# core functions
780bcc0f
DM		 1733my $bridge_firewall_enabled = 0;
1734
1735sub enable_bridge_firewall {
1736
1737 return if $bridge_firewall_enabled; # only once
1738
5f0a912c
DM		 1739 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1740 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1741
6a8a75db
DM		 1742 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1743 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1744
780bcc0f
DM		 1745 $bridge_firewall_enabled = 1;
1746}
1747
b16e818e
DM		 1748sub iptables_restore_cmdlist {
1749 my ($cmdlist) = @_;
3a616aa0 1750
c1031ab1 1751 run_command(['iptables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
3a616aa0
AD		 1752}
1753
17da5c0f
AD		 1754sub ip6tables_restore_cmdlist {
1755 my ($cmdlist) = @_;
1756
c1031ab1 1757 run_command(['ip6tables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
17da5c0f
AD		 1758}
1759
34cdedfa
AD		 1760sub ipset_restore_cmdlist {
1761 my ($cmdlist) = @_;
1762
bb6ebf3b 1763 run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
34cdedfa
AD		 1764}
1765
151c209e
AD		 1766sub ebtables_restore_cmdlist {
1767 my ($cmdlist) = @_;
1768
c1031ab1 1769 run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
151c209e
AD		 1770}
1771
de2a57cd 1772sub iptables_get_chains {
17da5c0f
AD		 1773 my ($iptablescmd) = @_;
1774
1775 $iptablescmd = "iptables" if !$iptablescmd;
de2a57cd
DM		 1776
1777 my $res = {};
1778
1779 # check what chains we want to track
1780 my $is_pvefw_chain = sub {
1781 my $name = shift;
1782
dec84fcd
DM		 1783 return 1 if $name =~ m/^PVEFW-\S+$/;
1784
a3ded5cd 1785 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
954f24b1 1786
a3ded5cd 1787 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
954f24b1 1788
a3ded5cd 1789 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
a89dfcc6 1790 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
de2a57cd
DM		 1791
1792 return undef;
1793 };
1794
1795 my $table = '';
1796
c4a2e5ae
DM		 1797 my $hooks = {};
1798
de2a57cd
DM		 1799 my $parser = sub {
1800 my $line = shift;
1801
1802 return if $line =~ m/^#/;
1803 return if $line =~ m/^\s*$/;
1804
1805 if ($line =~ m/^\*(\S+)$/) {
1806 $table = $1;
1807 return;
1808 }
1809
1810 return if $table ne 'filter';
1811
1812 if ($line =~ m/^:(\S+)\s/) {
1813 my $chain = $1;
1814 return if !&$is_pvefw_chain($chain);
3fa83edf 1815 $res->{$chain} = "unknown";
09d5f68e 1816 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1817 my ($chain, $sig) = ($1, $2);
de2a57cd 1818 return if !&$is_pvefw_chain($chain);
3fa83edf 1819 $res->{$chain} = $sig;
c4a2e5ae
DM		 1820 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1821 $hooks->{$1} = 1;
de2a57cd
DM		 1822 } else {
1823 # simply ignore the rest
1824 return;
1825 }
1826 };
1827
c1031ab1 1828 run_command(["$iptablescmd-save"], outfunc => $parser);
de2a57cd 1829
c4a2e5ae 1830 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 1831}
1832
9bf7d929
DM		 1833sub iptables_chain_digest {
1834 my ($rules) = @_;
1835 my $digest = Digest::SHA->new('sha1');
1836 foreach my $rule (@$rules) { # order is important
1837 $digest->add($rule);
1838 }
1839 return $digest->b64digest;
1840}
1841
3f95d14a
DM		 1842sub ipset_chain_digest {
1843 my ($rules) = @_;
4bd0a9c4 1844
3f95d14a
DM		 1845 my $digest = Digest::SHA->new('sha1');
1846 foreach my $rule (sort @$rules) { # note: sorted
1847 $digest->add($rule);
1848 }
1849 return $digest->b64digest;
1850}
1851
34cdedfa
AD		 1852sub ipset_get_chains {
1853
1854 my $res = {};
1855 my $chains = {};
1856
1857 my $parser = sub {
1858 my $line = shift;
1859
1860 return if $line =~ m/^#/;
1861 return if $line =~ m/^\s*$/;
4b96e877 1862 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
DM		 1863 my $chain = $1;
1864 $line =~ s/\s+$//; # delete trailing white space
1865 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 1866 } else {
1867 # simply ignore the rest
1868 return;
1869 }
1870 };
1871
c1031ab1 1872 run_command(['ipset', 'save'], outfunc => $parser);
34cdedfa 1873
3f95d14a
DM		 1874 # compute digest for each chain
1875 foreach my $chain (keys %$chains) {
1876 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 1877 }
1878
1879 return $res;
1880}
1881
151c209e
AD		 1882sub ebtables_get_chains {
1883
1884 my $res = {};
1885 my $chains = {};
151c209e
AD		 1886 my $parser = sub {
1887 my $line = shift;
1888 return if $line =~ m/^#/;
1889 return if $line =~ m/^\s*$/;
fc1f1de9
WB		 1890 if ($line =~ m/^:(\S+)\s\S+$/) {
1891 # Make sure we know chains exist even if they're empty.
1892 $chains->{$1} //= [];
84025e99 1893 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
151c209e
AD		 1894 my $chain = $1;
1895 $line =~ s/\s+$//;
1896 push @{$chains->{$chain}}, $line;
1897 } else {
1898 # simply ignore the rest
1899 return;
1900 }
1901 };
1902
c1031ab1 1903 run_command(['ebtables-save'], outfunc => $parser);
84025e99 1904 # compute digest for each chain and store rules as well
151c209e 1905 foreach my $chain (keys %$chains) {
84025e99
SI		 1906 $res->{$chain}->{rules} = $chains->{$chain};
1907 $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
151c209e
AD		 1908 }
1909 return $res;
1910}
1911
180da76c
TW		 1912# substitude action of rule according to action hash
1913sub rule_substitude_action {
1914 my ($rule, $actions) = @_;
1915
1916 if (my $action = $rule->{action}) {
1917 $rule->{action} = $actions->{$action} if defined($actions->{$action});
1918 }
1919}
1920
a44cb745
TW		 1921# generate a src or dst match
1922# $dir(ection) is either d or s
1923sub ipt_gen_src_or_dst_match {
1924 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1925
1926 my $srcdst;
1927 if ($dir eq 's') {
1928 $srcdst = "src";
1929 } elsif ($dir eq 'd') {
1930 $srcdst = "dst";
1931 } else {
1932 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1933 }
1934
1935 my $match;
1936 if ($adr =~ m/^\+/) {
1937 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1938 my $name = $1;
1939 my $ipset_chain;
1940 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1941 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1942 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1943 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1944 } else {
1945 die "no such ipset '$name'\n";
1946 }
1947 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1948 } else {
1949 die "invalid security group name '$adr'\n";
1950 }
1951 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1952 my $alias = lc($adr);
1953 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1954 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1955 die "no such alias '$adr'\n" if !$e;
1956 $match = "-${dir} $e->{cidr}";
1957 } elsif ($adr =~ m/\-/){
1958 $match = "-m iprange --${srcdst}-range $adr";
1959 } else {
1960 $match = "-${dir} $adr";
1961 }
1962
1963 return $match;
1964}
1965
30c390f9
TW		 1966# convert a %rule to an array of iptables commands
1967sub ipt_rule_to_cmds {
1968 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1969
1970 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1971
1972 my @match = ();
1973
1974 if (defined $rule->{match}) {
1975 push @match, $rule->{match};
1976 } else {
1977 push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1978 push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1979
1980 if ($rule->{source}) {
1981 push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1982 }
1983 if ($rule->{dest}) {
1984 push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1985 }
1986
1987 if (my $proto = $rule->{proto}) {
1988 push @match, "-p $proto";
1989
f776d6de
WB		 1990 my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1991 my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
30c390f9 1992
f776d6de
WB		 1993 my $add_dport = sub {
1994 return if !$rule->{dport};
3dffed4c 1995
30c390f9
TW		 1996 if ($proto eq 'icmp') {
1997 # Note: we use dport to store --icmp-type
1998 die "unknown icmp-type '$rule->{dport}'\n"
1999 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2000 push @match, "-m icmp --icmp-type $rule->{dport}";
2001 } elsif ($proto eq 'icmpv6') {
2002 # Note: we use dport to store --icmpv6-type
2003 die "unknown icmpv6-type '$rule->{dport}'\n"
2004 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2005 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2006 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2007 die "protocol $proto does not have ports\n";
f776d6de
WB		 2008 } elsif ($multidport) {
2009 push @match, "--match multiport", "--dports $rule->{dport}";
30c390f9 2010 } else {
f776d6de 2011 push @match, "--dport $rule->{dport}";
30c390f9 2012 }
f776d6de 2013 };
30c390f9 2014
f776d6de
WB		 2015 my $add_sport = sub {
2016 return if !$rule->{sport};
3dffed4c 2017
30c390f9
TW		 2018 die "protocol $proto does not have ports\n"
2019 if !$PROTOCOLS_WITH_PORTS->{$proto};
f776d6de
WB		 2020 if ($multisport) {
2021 push @match, "--match multiport", "--sports $rule->{sport}";
30c390f9
TW		 2022 } else {
2023 push @match, "--sport $rule->{sport}";
2024 }
f776d6de
WB		 2025 };
2026
3dffed4c 2027 # order matters - single port before multiport!
f776d6de
WB		 2028 $add_dport->() if $multisport;
2029 $add_sport->();
2030 $add_dport->() if !$multisport;
30c390f9
TW		 2031 } elsif ($rule->{dport} || $rule->{sport}) {
2032 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2033 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2034 }
2035
2036 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2037 }
2038 my $matchstr = scalar(@match) ? join(' ', @match) : "";
2039
2040 my $targetstr;
2041 if (defined $rule->{target}) {
2042 $targetstr = $rule->{target};
2043 } else {
2044 my $action = (defined $rule->{action}) ? $rule->{action} : "";
2045 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2046 $targetstr = ($goto) ? "-g $action" : "-j $action";
2047 }
2048
2049 my @iptcmds;
2db2b6aa
TL		 2050 my $log = $rule->{log};
2051 if (defined($log) && $log ne 'nolog') {
3489f8a2
CE		 2052 my $loglevel = $log_level_hash->{$log};
2053 my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
30c390f9
TW		 2054 push @iptcmds, "-A $chain $matchstr $logaction";
2055 }
2056 push @iptcmds, "-A $chain $matchstr $targetstr";
2057 return @iptcmds;
2058}
2059
eba0fb64 2060sub ruleset_generate_rule {
3489f8a2 2061 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
eba0fb64 2062
e5076eee
DM		 2063 my $rules;
2064
2065 if ($rule->{macro}) {
35d1d6da 2066 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
e5076eee
DM		 2067 } else {
2068 $rules = [ $rule ];
2069 }
2070
30c390f9
TW		 2071 # update all or nothing
2072 my @ipt_rule_cmds;
2073 foreach my $r (@$rules) {
3489f8a2 2074 push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
30c390f9
TW		 2075 }
2076 foreach my $c (@ipt_rule_cmds) {
2077 ruleset_add_ipt_cmd($ruleset, $chain, $c);
2078 }
2079}
2080
3fa83edf
DM		 2081sub ruleset_create_chain {
2082 my ($ruleset, $chain) = @_;
3a616aa0 2083
d050c724 2084 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 2085 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 2086
3fa83edf
DM		 2087 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2088
2089 $ruleset->{$chain} = [];
3a616aa0
AD		 2090}
2091
3fa83edf
DM		 2092sub ruleset_chain_exist {
2093 my ($ruleset, $chain) = @_;
3a616aa0 2094
3fa83edf
DM		 2095 return $ruleset->{$chain} ? 1 : undef;
2096}
3a616aa0 2097
30c390f9
TW		 2098# add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2099sub ruleset_add_ipt_cmd {
2100 my ($ruleset, $chain, $iptcmd) = @_;
2101
2102 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2103
2104 push @{$ruleset->{$chain}}, $iptcmd;
2105}
2106
1e9c5070 2107sub ruleset_addrule {
3489f8a2 2108 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
1e9c5070 2109
3489f8a2 2110 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1e9c5070 2111
3489f8a2
CE		 2112 if ($log) {
2113 my $loglevel = $log_level_hash->{$log};
2114 my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
7f7930f8 2115 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
3489f8a2
CE		 2116 }
2117 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2118 $match .= ' ' if length($match);
2119 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
1e9c5070
TW		 2120}
2121
3fa83edf 2122sub ruleset_insertrule {
1e9c5070 2123 my ($ruleset, $chain, $match, $action, $log) = @_;
3a616aa0 2124
3fa83edf 2125 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 2126
1e9c5070 2127 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
3fa83edf 2128}
3a616aa0 2129
782c4cde
DM		 2130sub get_log_rule_base {
2131 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 2132
782c4cde 2133 $vmid = 0 if !defined($vmid);
7f7930f8 2134 $msg = "" if !defined($msg);
782c4cde 2135
cc37e000
TL		 2136 my $rlimit = '';
2137 if (defined($global_log_ratelimit)) {
2138 $rlimit = "-m limit $global_log_ratelimit ";
2139 }
2140
cbb5d6f3 2141 # Note: we use special format for prefix to pass further
7f7930f8 2142 # info to log daemon (VMID, LOGLEVEL and CHAIN)
cc37e000 2143 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
782c4cde
DM		 2144}
2145
ead850e8 2146sub ruleset_add_chain_policy {
88c26d5e 2147 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 2148
2149 if ($policy eq 'ACCEPT') {
2150
180da76c
TW		 2151 my $rule = { action => 'ACCEPT' };
2152 rule_substitude_action($rule, { ACCEPT => $accept_action});
2153 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
ead850e8
DM		 2154
2155 } elsif ($policy eq 'DROP') {
2156
1e9c5070 2157 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
ead850e8 2158
7f7930f8 2159 ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
ead850e8 2160 } elsif ($policy eq 'REJECT') {
1e9c5070 2161 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
ead850e8 2162
d8d4dd67 2163 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
ead850e8
DM		 2164 } else {
2165 # should not happen
2166 die "internal error: unknown policy '$policy'";
2167 }
2168}
2169
a83abe93 2170sub ruleset_chain_add_ndp {
e8415920 2171 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
a83abe93
WB		 2172 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2173
1e9c5070 2174 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
d7aa51ac 2175 if ($direction ne 'OUT' || $options->{radv}) {
1e9c5070 2176 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
d7aa51ac 2177 }
1e9c5070
TW		 2178 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2179 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
a83abe93
WB		 2180}
2181
e2943485 2182sub ruleset_chain_add_conn_filters {
27c49e25 2183 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
e2943485 2184
27c49e25
CE		 2185 if (!$allow_invalid) {
2186 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2187 }
1e9c5070 2188 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
e2943485
DM		 2189}
2190
2191sub ruleset_chain_add_input_filters {
88c26d5e 2192 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2428e394
AD		 2193
2194 if ($cluster_conf->{ipset}->{blacklist}){
b5831a0d
AD		 2195 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2196 ruleset_create_chain($ruleset, "PVEFW-blacklist");
3489f8a2 2197 ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
b5831a0d 2198 }
88c26d5e 2199 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1e9c5070 2200 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2428e394 2201 }
e2943485
DM		 2202
2203 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
5b5c42b1 2204 if ($ipversion == 4) {
1e9c5070 2205 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
5b5c42b1 2206 }
e2943485
DM		 2207 }
2208
2209 if ($options->{tcpflags}) {
1e9c5070 2210 ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
e2943485
DM		 2211 }
2212}
2213
9e15114a 2214sub ruleset_create_vm_chain {
88c26d5e 2215 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
3a616aa0 2216
9e15114a 2217 ruleset_create_chain($ruleset, $chain);
b47ecc88 2218 my $accept = generate_nfqueue($options);
3a616aa0 2219
ce15d90b 2220 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
dcafc5fb
WB		 2221 if ($ipversion == 4) {
2222 if ($direction eq 'OUT') {
2223 ruleset_generate_rule($ruleset, $chain, $ipversion,
2224 { action => 'PVEFW-SET-ACCEPT-MARK',
2225 proto => 'udp', sport => 68, dport => 67 });
2226 } else {
2227 ruleset_generate_rule($ruleset, $chain, $ipversion,
2228 { action => 'ACCEPT',
2229 proto => 'udp', sport => 67, dport => 68 });
2230 }
2231 } elsif ($ipversion == 6) {
2232 if ($direction eq 'OUT') {
2233 ruleset_generate_rule($ruleset, $chain, $ipversion,
2234 { action => 'PVEFW-SET-ACCEPT-MARK',
2235 proto => 'udp', sport => 546, dport => 547 });
2236 } else {
2237 ruleset_generate_rule($ruleset, $chain, $ipversion,
2238 { action => 'ACCEPT',
2239 proto => 'udp', sport => 547, dport => 546 });
2240 }
76a2d1e7 2241 }
dcafc5fb 2242
ce15d90b
DM		 2243 }
2244
b21aca2c
DM		 2245 if ($direction eq 'OUT') {
2246 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1e9c5070 2247 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
b21aca2c 2248 }
d7aa51ac 2249 if ($ipversion == 6 && !$options->{radv}) {
1e9c5070 2250 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
d7aa51ac 2251 }
808d711d 2252 if ($ipfilter_ipset) {
1e9c5070 2253 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
808d711d 2254 }
1e9c5070 2255 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
c29f55c9 2256 }
e8415920
WB		 2257
2258 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2259 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
9e15114a
DM		 2260}
2261
4bc6b5ac 2262sub ruleset_add_group_rule {
aedde2c2 2263 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
4bc6b5ac
DM		 2264
2265 my $group = $rule->{action};
2266 my $group_chain = "GROUP-$group-$direction";
2267 if(!ruleset_chain_exist($ruleset, $group_chain)){
aedde2c2 2268 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
4bc6b5ac 2269 }
bfc488f6 2270
f8b12fff 2271 if ($direction eq 'OUT' && $rule->{iface_out}) {
1e9c5070 2272 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
f8b12fff 2273 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1e9c5070 2274 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
4bc6b5ac 2275 } else {
1e9c5070 2276 ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
4bc6b5ac
DM		 2277 }
2278
1e9c5070 2279 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
4bc6b5ac
DM		 2280}
2281
9e15114a 2282sub ruleset_generate_vm_rules {
3489f8a2 2283 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
9e15114a
DM		 2284
2285 my $lc_direction = lc($direction);
c29f55c9 2286
6b8ca015
DM		 2287 my $in_accept = generate_nfqueue($options);
2288
92e976b3
DM		 2289 foreach my $rule (@$rules) {
2290 next if $rule->{iface} && $rule->{iface} ne $netid;
b7ab6989 2291 next if !$rule->{enable} || $rule->{errors};
006490cb 2292 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
84870b1a 2293
92e976b3 2294 if ($rule->{type} eq 'group') {
4bc6b5ac 2295 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
aedde2c2 2296 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
92e976b3
DM		 2297 } else {
2298 next if $rule->{type} ne $lc_direction;
921dfb33 2299 eval {
3489f8a2 2300 $rule->{logmsg} = "$rule->{action}: ";
921dfb33 2301 if ($direction eq 'OUT') {
180da76c 2302 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
3489f8a2 2303 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
921dfb33 2304 } else {
180da76c 2305 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
3489f8a2 2306 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
921dfb33
DM		 2307 }
2308 };
2309 warn $@ if $@;
4e6112f9 2310 }
3a616aa0 2311 }
9e15114a
DM		 2312}
2313
b47ecc88
AD		 2314sub generate_nfqueue {
2315 my ($options) = @_;
2316
73089769
DM		 2317 if ($options->{ips}) {
2318 my $action = "NFQUEUE";
2319 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2320 if (defined($3) && defined($1)) {
b47ecc88 2321 $action .= " --queue-balance $1:$3";
73089769 2322 } elsif (defined($1)) {
b47ecc88
AD		 2323 $action .= " --queue-num $1";
2324 }
2325 }
8dc92812 2326 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
73089769
DM		 2327 return $action;
2328 } else {
2329 return "ACCEPT";
b47ecc88 2330 }
b47ecc88
AD		 2331}
2332
da6fc60b 2333sub ruleset_generate_vm_ipsrules {
a01c32c7 2334 my ($ruleset, $options, $direction, $iface) = @_;
da6fc60b
AD		 2335
2336 if ($options->{ips} && $direction eq 'IN') {
2337 my $nfqueue = generate_nfqueue($options);
2338
a01c32c7 2339 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
da6fc60b
AD		 2340 ruleset_create_chain($ruleset, "PVEFW-IPS");
2341 }
2342
1e9c5070 2343 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
da6fc60b
AD		 2344 }
2345}
2346
9e15114a 2347sub generate_tap_rules_direction {
84870b1a 2348 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
9e15114a
DM		 2349
2350 my $lc_direction = lc($direction);
2351
2352 my $rules = $vmfw_conf->{rules};
2353
2354 my $options = $vmfw_conf->{options};
2355 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2356
2357 my $tapchain = "$iface-$direction";
2358
b692f42c 2359 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
88c26d5e 2360 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
74601077 2361 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
808d711d 2362
a34cfdd0 2363 # create chain with mac and ip filter
88c26d5e 2364 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
9e15114a 2365
a34cfdd0 2366 if ($options->{enable}) {
3489f8a2 2367 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
3a616aa0 2368
a34cfdd0 2369 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
da6fc60b 2370
a34cfdd0
DM		 2371 # implement policy
2372 my $policy;
ccae0b50 2373
a34cfdd0
DM		 2374 if ($direction eq 'OUT') {
2375 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2376 } else {
76448f08 2377 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
a34cfdd0 2378 }
ccae0b50 2379
a34cfdd0
DM		 2380 my $accept = generate_nfqueue($options);
2381 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
88c26d5e 2382 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
a34cfdd0
DM		 2383 } else {
2384 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
88c26d5e 2385 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
a34cfdd0 2386 }
3a616aa0 2387
3fa83edf 2388 # plug the tap chain to bridge chain
3cc81077 2389 if ($direction eq 'IN') {
a01c32c7 2390 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
8f3aa9cc 2391 "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
3cc81077 2392 } else {
a01c32c7 2393 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
8f3aa9cc 2394 "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
3cc81077 2395 }
3a616aa0
AD		 2396}
2397
d18c1e2b 2398sub enable_host_firewall {
06208a01 2399 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
0bd5f137 2400
92e976b3 2401 my $options = $hostfw_conf->{options};
63324b09 2402 my $cluster_options = $cluster_conf->{options};
92e976b3 2403 my $rules = $hostfw_conf->{rules};
35f0c37e 2404 my $cluster_rules = $cluster_conf->{rules};
178a63be 2405
06208a01
SR		 2406 # corosync preparation
2407 my $corosync_rule = "-p udp --dport 5404:5405";
2408 my $corosync_local_addresses = {};
eacd4748 2409 my $multicast_enabled;
06208a01
SR		 2410 my $local_hostname = PVE::INotify::nodename();
2411 if (defined($corosync_conf)) {
2412 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2413 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2414
2415 if ($node_name eq $local_hostname) {
2416 $corosync_local_addresses->{$key} = $node_ip;
2417 }
2418 });
eacd4748
SR		 2419
2420 # allow multicast only if enabled in config
81a0a9ff
FG		 2421 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2422 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
06208a01
SR		 2423 }
2424
3fa83edf 2425 # host inbound firewall
dec84fcd
DM		 2426 my $chain = "PVEFW-HOST-IN";
2427 ruleset_create_chain($ruleset, $chain);
0bd5f137 2428
178a63be
DM		 2429 my $loglevel = get_option_log_level($options, "log_level_in");
2430
1e9c5070 2431 ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
4ac863a6 2432
27c49e25 2433 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e8415920 2434 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
88c26d5e 2435 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
fb424a00 2436
23e888f8
DM		 2437 # we use RETURN because we need to check also tap rules
2438 my $accept_action = 'RETURN';
2439
1e9c5070 2440 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2441
35f0c37e
DM		 2442 # add host rules first, so that cluster wide rules can be overwritten
2443 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2444 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2445 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
bfc488f6 2446
f8b12fff 2447 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
5383df39 2448
1a9978ed
DM		 2449 eval {
2450 if ($rule->{type} eq 'group') {
aedde2c2 2451 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
1a9978ed 2452 } elsif ($rule->{type} eq 'in') {
180da76c 2453 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2454 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2455 }
2456 };
2457 warn $@ if $@;
f8b12fff 2458 delete $rule->{iface_in};
0bd5f137 2459 }
eb399cef
DM		 2460
2461 # allow standard traffic for management ipset (includes cluster network)
88c26d5e 2462 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
708ba714 2463 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1e9c5070
TW		 2464 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
2465 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2466 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2467 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
bfc488f6 2468
06208a01
SR		 2469 # corosync inbound rules
2470 if (defined($corosync_conf)) {
eacd4748
SR		 2471 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2472 if $multicast_enabled;
3bc79f87 2473
06208a01
SR		 2474 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2475 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
a9c463ce 2476 my $destination = $corosync_local_addresses->{$key};
06208a01 2477
a9c463ce 2478 if ($node_name ne $local_hostname && defined($destination)) {
06208a01 2479 # accept only traffic on same ring
a9c463ce 2480 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
06208a01
SR		 2481 }
2482 });
3bc79f87 2483 }
0bd5f137 2484
23e888f8 2485 # implement input policy
63324b09 2486 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
88c26d5e 2487 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
0bd5f137 2488
3fa83edf 2489 # host outbound firewall
aadd745e 2490 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 2491 ruleset_create_chain($ruleset, $chain);
2492
178a63be
DM		 2493 $loglevel = get_option_log_level($options, "log_level_out");
2494
1e9c5070 2495 ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
e2943485 2496
27c49e25 2497 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e2943485 2498
23e888f8
DM		 2499 # we use RETURN because we may want to check other thigs later
2500 $accept_action = 'RETURN';
e8415920 2501 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
23e888f8 2502
1e9c5070 2503 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2504
35f0c37e
DM		 2505 # add host rules first, so that cluster wide rules can be overwritten
2506 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2507 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2508 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
5383df39 2509
f8b12fff 2510 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1a9978ed 2511 eval {
3489f8a2 2512 $rule->{logmsg} = "$rule->{action}: ";
1a9978ed 2513 if ($rule->{type} eq 'group') {
aedde2c2 2514 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
1a9978ed 2515 } elsif ($rule->{type} eq 'out') {
180da76c 2516 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2517 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2518 }
2519 };
2520 warn $@ if $@;
f8b12fff 2521 delete $rule->{iface_out};
0bd5f137
AD		 2522 }
2523
3bc79f87 2524 # allow standard traffic on cluster network
06208a01
SR		 2525 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2526 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2527
35d1d6da 2528 if ($localnet && ($ipversion == $localnet_ver)) {
1e9c5070
TW		 2529 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
2530 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
2531 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2532 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
06208a01 2533 }
bfc488f6 2534
06208a01
SR		 2535 # corosync outbound rules
2536 if (defined($corosync_conf)) {
eacd4748
SR		 2537 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2538 if $multicast_enabled;
06208a01
SR		 2539
2540 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2541 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
a9c463ce 2542 my $source = $corosync_local_addresses->{$key};
06208a01 2543
a9c463ce 2544 if ($node_name ne $local_hostname && defined($source)) {
06208a01 2545 # accept only traffic on same ring
a9c463ce 2546 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
06208a01
SR		 2547 }
2548 });
3bc79f87
DM		 2549 }
2550
23e888f8 2551 # implement output policy
63324b09 2552 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
88c26d5e 2553 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
6158271d 2554
1e9c5070
TW		 2555 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2556 ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
9d31b418
AD		 2557}
2558
2559sub generate_group_rules {
aedde2c2 2560 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
9d31b418 2561
c6f5cc88 2562 my $rules = $cluster_conf->{groups}->{$group};
6158271d 2563
b4deedab
DM		 2564 if (!$rules) {
2565 warn "no such security group '$group'\n";
2566 $rules = []; # create empty chain
2567 }
2568
3fa83edf 2569 my $chain = "GROUP-${group}-IN";
9d31b418 2570
3fa83edf 2571 ruleset_create_chain($ruleset, $chain);
1e9c5070 2572 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2573
92e976b3
DM		 2574 foreach my $rule (@$rules) {
2575 next if $rule->{type} ne 'in';
7a5a402b 2576 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2577 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
180da76c 2578 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2dc0a26e 2579 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418
AD		 2580 }
2581
3fa83edf 2582 $chain = "GROUP-${group}-OUT";
9d31b418 2583
3fa83edf 2584 ruleset_create_chain($ruleset, $chain);
1e9c5070 2585 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2586
92e976b3
DM		 2587 foreach my $rule (@$rules) {
2588 next if $rule->{type} ne 'out';
7a5a402b 2589 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2590 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
92e976b3
DM		 2591 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2592 # check also other tap rules later
180da76c 2593 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2dc0a26e 2594 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418 2595 }
9d31b418
AD		 2596}
2597
51bae274
DM		 2598my $MAX_NETS = 32;
2599my $valid_netdev_names = {};
2600for (my $i = 0; $i < $MAX_NETS; $i++) {
2601 $valid_netdev_names->{"net$i"} = 1;
2602}
5e1267a5 2603
fe3d79b4
WB		 2604sub get_mark_values {
2605 my ($value, $mask) = @_;
2606 $value = hex($value) if $value =~ /^0x/;
2607 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2608 $mask = 0xffffffff if !defined($mask);
2609 return ($value, $mask);
2610}
2611
51bae274 2612sub parse_fw_rule {
40af93c4 2613 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
5e1267a5 2614
d4cda423
DM		 2615 my $orig_line = $line;
2616
6d9246e7
DM		 2617 my $rule = {};
2618
11bac5c2 2619 # we can add single line comments to the end of the rule
6d9246e7
DM		 2620 if ($line =~ s/#\s*(.*?)\s*$//) {
2621 $rule->{comment} = decode('utf8', $1);
2622 }
11bac5c2
DM		 2623
2624 # we can disable a rule when prefixed with '|'
ea9e5116 2625
6d9246e7 2626 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
51bae274 2627
dba740a9
DM		 2628 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2629 die "unable to parse rule: $line\n";
6d9246e7
DM		 2630
2631 $rule->{type} = lc($1);
2632 $rule->{action} = $2;
2633
2634 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2635 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2636 $rule->{macro} = $1;
2637 $rule->{action} = $2;
92e976b3 2638 }
51bae274
DM		 2639 }
2640
dba740a9
DM		 2641 while (length($line)) {
2642 if ($line =~ s/^-i (\S+)\s*//) {
6d9246e7 2643 $rule->{iface} = $1;
dba740a9
DM		 2644 next;
2645 }
51bae274 2646
6d9246e7 2647 last if $rule->{type} eq 'group';
51bae274 2648
dba740a9 2649 if ($line =~ s/^-p (\S+)\s*//) {
6d9246e7 2650 $rule->{proto} = $1;
dba740a9
DM		 2651 next;
2652 }
6d9246e7 2653
dba740a9 2654 if ($line =~ s/^-dport (\S+)\s*//) {
6d9246e7 2655 $rule->{dport} = $1;
dba740a9
DM		 2656 next;
2657 }
6d9246e7 2658
dba740a9 2659 if ($line =~ s/^-sport (\S+)\s*//) {
6d9246e7 2660 $rule->{sport} = $1;
dba740a9
DM		 2661 next;
2662 }
2663 if ($line =~ s/^-source (\S+)\s*//) {
6d9246e7 2664 $rule->{source} = $1;
dba740a9
DM		 2665 next;
2666 }
2667 if ($line =~ s/^-dest (\S+)\s*//) {
6d9246e7 2668 $rule->{dest} = $1;
dba740a9
DM		 2669 next;
2670 }
3489f8a2
CE		 2671 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2672 $rule->{log} = $1;
2673 next;
2674 }
51bae274 2675
dba740a9
DM		 2676 last;
2677 }
ba791b1f 2678
dba740a9 2679 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 2680
a523e057 2681 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
eedcb564
WB		 2682 if ($rule->{errors}) {
2683 # The verbose flag really means we're running from the CLI and want
2684 # output on the console - in the other case we really want such errors
2685 # to go into the syslog instead.
2686 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2687 $log->("$prefix - errors in rule parameters: $orig_line\n");
d4cda423 2688 foreach my $p (keys %{$rule->{errors}}) {
eedcb564 2689 $log->(" $p: $rule->{errors}->{$p}\n");
d4cda423
DM		 2690 }
2691 }
6d9246e7
DM		 2692
2693 return $rule;
51bae274
DM		 2694}
2695
c5e8b008
AD		 2696sub verify_ethertype {
2697 my ($value) = @_;
2698 my $types = get_etc_ethertypes();
2699 die "unknown ethernet protocol type: $value\n"
2700 if !defined($types->{byname}->{$value}) &&
2701 !defined($types->{byid}->{$value});
2702}
2703
2d404ffc 2704sub parse_vmfw_option {
85c6eaed
DM		 2705 my ($line) = @_;
2706
2707 my ($opt, $value);
2708
178a63be
DM		 2709 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2710
74601077 2711 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 2712 $opt = lc($1);
2713 $value = int($2);
178a63be
DM		 2714 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2715 $opt = lc($1);
2716 $value = $2 ? lc($3) : '';
72f63fde 2717 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 2718 $opt = lc($1);
2719 $value = uc($3);
b47ecc88
AD		 2720 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2721 $opt = lc($1);
2722 $value = $2;
c5e8b008
AD		 2723 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2724 $opt = lc($1);
2725 $value = $2;
2726 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
9c6b6efd 2727 } else {
85c6eaed
DM		 2728 die "can't parse option '$line'\n"
2729 }
2730
2731 return ($opt, $value);
2732}
2733
2d404ffc
DM		 2734sub parse_hostfw_option {
2735 my ($line) = @_;
2736
2737 my ($opt, $value);
2738
2739 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2740
27c49e25 2741 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2d404ffc
DM		 2742 $opt = lc($1);
2743 $value = int($2);
178a63be 2744 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 2745 $opt = lc($1);
2746 $value = $2 ? lc($3) : '';
28c082a1 2747 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 2748 $opt = lc($1);
2749 $value = int($2);
2d404ffc 2750 } else {
2d404ffc
DM		 2751 die "can't parse option '$line'\n"
2752 }
2753
2754 return ($opt, $value);
2755}
2756
c6f5cc88
DM		 2757sub parse_clusterfw_option {
2758 my ($line) = @_;
2759
2760 my ($opt, $value);
2761
72d055fc 2762 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
c6f5cc88
DM		 2763 $opt = lc($1);
2764 $value = int($2);
72d055fc
AG		 2765 if (($value > 1) && ((time() - $value) > 60)) {
2766 $value = 0
2767 }
2549e7ef 2768 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
84025e99
SI		 2769 $opt = lc($1);
2770 $value = int($2);
63324b09
DM		 2771 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2772 $opt = lc($1);
2773 $value = uc($3);
cc37e000
TL		 2774 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2775 $opt = lc($1);
2776 $value = $2;
c6f5cc88 2777 } else {
c6f5cc88
DM		 2778 die "can't parse option '$line'\n"
2779 }
2780
2781 return ($opt, $value);
2782}
2783
6c221576
DM		 2784sub resolve_alias {
2785 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2786
6d959e3f 2787 my $alias = lc($cidr);
04f5088f 2788 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
6d959e3f 2789 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
6c221576 2790
6d959e3f
DM		 2791 die "no such alias '$cidr'\n" if !$e;;
2792
2793 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
6c221576
DM		 2794}
2795
ae029a88
DM		 2796sub parse_ip_or_cidr {
2797 my ($cidr) = @_;
2798
2799 my $ipversion;
2800
2801 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2802 $cidr =~ s|/128$||;
2803 $ipversion = 6;
2804 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2805 $cidr =~ s|/32$||;
2806 $ipversion = 4;
2807 } else {
2808 die "value does not look like a valid IP address or CIDR network\n";
2809 }
2810
2811 return wantarray ? ($cidr, $ipversion) : $cidr;
2812}
2813
e76a9f53 2814sub parse_alias {
92e1209b
AD		 2815 my ($line) = @_;
2816
81d574a7
DM		 2817 # we can add single line comments to the end of the line
2818 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2819
92e1209b 2820 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7 2821 my ($name, $cidr) = ($1, $2);
ae029a88
DM		 2822 my $ipversion;
2823
2824 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2825
81d574a7
DM		 2826 my $data = {
2827 name => $name,
2828 cidr => $cidr,
70e524eb 2829 ipversion => $ipversion,
81d574a7
DM		 2830 };
2831 $data->{comment} = $comment if $comment;
2832 return $data;
92e1209b
AD		 2833 }
2834
81d574a7 2835 return undef;
92e1209b
AD		 2836}
2837
e5cd1ee0 2838sub generic_fw_config_parser {
585ede43
TL		 2839 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2840
51bae274
DM		 2841 my $section;
2842 my $group;
2843
1210ae94 2844 my $res = $empty_conf;
6158271d 2845
0dbef530
TL		 2846 my $raw;
2847 if ($filename =~ m!^/etc/pve/(.*)$!) {
2848 $raw = PVE::Cluster::get_config($1);
2849 } else {
2850 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2851 }
2852 return {} if !$raw;
2853
2854 my $linenr = 0;
2855 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2856 my $line = $1;
2857 $linenr++;
51bae274
DM		 2858 next if $line =~ m/^#/;
2859 next if $line =~ m/^\s*$/;
c8c534f7
DM		 2860 chomp $line;
2861
961b4928
DM		 2862 my $prefix = "$filename (line $linenr)";
2863
1210ae94 2864 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
c6f5cc88
DM		 2865 $section = 'options';
2866 next;
2867 }
2868
1210ae94 2869 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
92e1209b
AD		 2870 $section = 'aliases';
2871 next;
2872 }
2873
1210ae94 2874 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
c6f5cc88 2875 $section = 'groups';
92e976b3 2876 $group = lc($1);
0d22acb3 2877 my $comment = $2;
351052d1
DM		 2878 eval {
2879 die "security group name too long\n" if length($group) > $max_group_name_length;
2880 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2881 };
2882 if (my $err = $@) {
2883 ($section, $group, $comment) = undef;
2884 warn "$prefix: $err";
2885 next;
2886 }
2887
c85c87f9 2888 $res->{$section}->{$group} = [];
649e4d57
DM		 2889 $res->{group_comments}->{$group} = decode('utf8', $comment)
2890 if $comment;
51bae274
DM		 2891 next;
2892 }
34cdedfa 2893
1210ae94 2894 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
c6f5cc88
DM		 2895 $section = 'rules';
2896 next;
2897 }
cbb5d6f3 2898
1210ae94 2899 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
34cdedfa
AD		 2900 $section = 'ipset';
2901 $group = lc($1);
d72c631c 2902 my $comment = $2;
351052d1
DM		 2903 eval {
2904 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2905 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2906 };
2907 if (my $err = $@) {
2908 ($section, $group, $comment) = undef;
2909 warn "$prefix: $err";
2910 next;
2911 }
2912
c85c87f9 2913 $res->{$section}->{$group} = [];
e34d0e58 2914 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2915 if $comment;
34cdedfa
AD		 2916 next;
2917 }
2918
c6f5cc88 2919 if (!$section) {
cbb5d6f3 2920 warn "$prefix: skip line - no section\n";
51bae274
DM		 2921 next;
2922 }
2923
c6f5cc88
DM		 2924 if ($section eq 'options') {
2925 eval {
1210ae94
DM		 2926 my ($opt, $value);
2927 if ($rule_env eq 'cluster') {
2928 ($opt, $value) = parse_clusterfw_option($line);
2929 } elsif ($rule_env eq 'host') {
2930 ($opt, $value) = parse_hostfw_option($line);
2931 } else {
2932 ($opt, $value) = parse_vmfw_option($line);
2933 }
c6f5cc88
DM		 2934 $res->{options}->{$opt} = $value;
2935 };
2936 warn "$prefix: $@" if $@;
92e1209b
AD		 2937 } elsif ($section eq 'aliases') {
2938 eval {
e76a9f53 2939 my $data = parse_alias($line);
81d574a7 2940 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2941 };
2942 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2943 } elsif ($section eq 'rules') {
2944 my $rule;
40af93c4 2945 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
c6f5cc88
DM		 2946 if (my $err = $@) {
2947 warn "$prefix: $err";
2948 next;
2949 }
2950 push @{$res->{$section}}, $rule;
2951 } elsif ($section eq 'groups') {
34cdedfa 2952 my $rule;
40af93c4 2953 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
34cdedfa
AD		 2954 if (my $err = $@) {
2955 warn "$prefix: $err";
2956 next;
2957 }
3f95d14a 2958 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2959 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2960 # we can add single line comments to the end of the rule
2961 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2962
30f1b100 2963 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2964 my $nomatch = $1;
9d6f90e6 2965 my $cidr = $2;
d46b1ef6
DM		 2966 my $errors;
2967
2968 if ($nomatch && !$feature_ipset_nomatch) {
2969 $errors->{nomatch} = "nomatch not supported by kernel";
2970 }
2a052ee3 2971
4803b296
DM		 2972 eval {
2973 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2974 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2975 } else {
ae029a88 2976 $cidr = parse_ip_or_cidr($cidr);
92e1209b 2977 }
4803b296
DM		 2978 };
2979 if (my $err = $@) {
c8c534f7 2980 chomp $err;
d46b1ef6 2981 $errors->{cidr} = $err;
2a052ee3 2982 }
2a052ee3 2983
b14db52f
WB		 2984 if ($cidr =~ m!/0+$!) {
2985 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2986 }
2987
e34d0e58 2988 my $entry = { cidr => $cidr };
9d6f90e6
DM		 2989 $entry->{nomatch} = 1 if $nomatch;
2990 $entry->{comment} = $comment if $comment;
d46b1ef6 2991 $entry->{errors} = $errors if $errors;
e34d0e58 2992
c8c534f7 2993 if ($verbose && $errors) {
9a3061c7 2994 warn "$prefix - errors in ipset '$group': $line\n";
c8c534f7
DM		 2995 foreach my $p (keys %{$errors}) {
2996 warn " $p: $errors->{$p}\n";
2997 }
2998 }
2999
9d6f90e6 3000 push @{$res->{$section}->{$group}}, $entry;
1210ae94
DM		 3001 } else {
3002 warn "$prefix: skip line - unknown section\n";
3003 next;
51bae274 3004 }
5e1267a5
DM		 3005 }
3006
3007 return $res;
3008}
3009
06320eb0
DM		 3010sub run_locked {
3011 my ($code, @param) = @_;
3012
3013 my $timeout = 10;
3014
3015 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3016
3017 die $@ if $@;
3018
3019 return $res;
3020}
3021
5e1267a5
DM		 3022sub read_local_vm_config {
3023
5e1267a5 3024 my $qemu = {};
3b4882dc 3025 my $lxc = {};
5e1267a5 3026
fdefeeab 3027 my $vmdata = { qemu => $qemu, lxc => $lxc };
5e1267a5 3028
c8301d63
DM		 3029 my $vmlist = PVE::Cluster::get_vmlist();
3030 return $vmdata if !$vmlist || !$vmlist->{ids};
3031 my $ids = $vmlist->{ids};
3032
3033 foreach my $vmid (keys %$ids) {
3034 next if !$vmid; # skip VE0
3035 my $d = $ids->{$vmid};
3036 next if !$d->{node} || $d->{node} ne $nodename;
3037 next if !$d->{type};
fdefeeab 3038 if ($d->{type} eq 'qemu') {
d9fee004 3039 if ($have_qemu_server) {
b5a16dd3 3040 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
d9fee004
DM		 3041 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3042 $qemu->{$vmid} = $conf;
3043 }
c8301d63 3044 }
3b4882dc
AG		 3045 } elsif ($d->{type} eq 'lxc') {
3046 if ($have_lxc) {
a7c85d56 3047 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3b4882dc
AG		 3048 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3049 $lxc->{$vmid} = $conf;
3050 }
3051 }
3052 }
5e1267a5 3053 }
d9fee004 3054
5e1267a5
DM		 3055 return $vmdata;
3056};
3057
e7b35711 3058sub load_vmfw_conf {
40af93c4 3059 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
e7b35711 3060
21053409 3061 $dir = $pvefw_conf_dir if !defined($dir);
8aef5177 3062 my $filename = "$dir/$vmid.fw";
585ede43
TL		 3063
3064 my $empty_conf = {
3065 rules => [],
3066 options => {},
3067 aliases => {},
3068 ipset => {} ,
3069 ipset_comments => {},
3070 };
3071
3072 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3073 $vmfw_conf->{vmid} = $vmid;
e7b35711
DM		 3074
3075 return $vmfw_conf;
3076}
3077
464f933e 3078my $format_rules = sub {
dba740a9 3079 my ($rules, $allow_iface) = @_;
464f933e
DM		 3080
3081 my $raw = '';
3082
3083 foreach my $rule (@$rules) {
c14dacdf 3084 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 3085 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3086 $raw .= uc($rule->{type});
7ca36671
DM		 3087 if ($rule->{macro}) {
3088 $raw .= " $rule->{macro}($rule->{action})";
3089 } else {
3090 $raw .= " " . $rule->{action};
3091 }
dba740a9
DM		 3092 if ($allow_iface && $rule->{iface}) {
3093 $raw .= " -i $rule->{iface}";
3094 }
c14dacdf
DM		 3095
3096 if ($rule->{type} ne 'group') {
dba740a9
DM		 3097 $raw .= " -source $rule->{source}" if $rule->{source};
3098 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3099 $raw .= " -p $rule->{proto}" if $rule->{proto};
3100 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3101 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3489f8a2 3102 $raw .= " -log $rule->{log}" if $rule->{log};
c14dacdf
DM		 3103 }
3104
cbb5d6f3 3105 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 3106 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3107 $raw .= "\n";
3108 } else {
c14dacdf 3109 die "unknown rule type '$rule->{type}'";
464f933e
DM		 3110 }
3111 }
3112
3113 return $raw;
3114};
3115
3116my $format_options = sub {
68c90e21
DM		 3117 my ($options) = @_;
3118
3119 my $raw = '';
464f933e
DM		 3120
3121 $raw .= "[OPTIONS]\n\n";
3122 foreach my $opt (keys %$options) {
3123 $raw .= "$opt: $options->{$opt}\n";
3124 }
3125 $raw .= "\n";
68c90e21
DM		 3126
3127 return $raw;
464f933e
DM		 3128};
3129
0d5f0a0f
DM		 3130my $format_aliases = sub {
3131 my ($aliases) = @_;
3132
3133 my $raw = '';
3134
3135 $raw .= "[ALIASES]\n\n";
3136 foreach my $k (keys %$aliases) {
81d574a7
DM		 3137 my $e = $aliases->{$k};
3138 $raw .= "$e->{name} $e->{cidr}";
3139 $raw .= " # " . encode('utf8', $e->{comment})
3140 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3141 $raw .= "\n";
0d5f0a0f
DM		 3142 }
3143 $raw .= "\n";
3144
3145 return $raw;
3146};
3147
1210ae94
DM		 3148my $format_ipsets = sub {
3149 my ($fw_conf) = @_;
3150
9d6f90e6
DM		 3151 my $raw = '';
3152
1210ae94
DM		 3153 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3154 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3155 my $utf8comment = encode('utf8', $comment);
3156 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3157 } else {
3158 $raw .= "[IPSET $ipset]\n\n";
3159 }
3160 my $options = $fw_conf->{ipset}->{$ipset};
6e299ae3 3161
1210ae94
DM		 3162 my $nethash = {};
3163 foreach my $entry (@$options) {
3164 $nethash->{$entry->{cidr}} = $entry;
3165 }
3166
3167 foreach my $cidr (sort keys %$nethash) {
3168 my $entry = $nethash->{$cidr};
3169 my $line = $entry->{nomatch} ? '!' : '';
3170 $line .= $entry->{cidr};
3171 $line .= " # " . encode('utf8', $entry->{comment})
3172 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3173 $raw .= "$line\n";
3174 }
3175
3176 $raw .= "\n";
9d6f90e6 3177 }
e34d0e58 3178
9d6f90e6
DM		 3179 return $raw;
3180};
3181
464f933e
DM		 3182sub save_vmfw_conf {
3183 my ($vmid, $vmfw_conf) = @_;
3184
3185 my $raw = '';
3186
3187 my $options = $vmfw_conf->{options};
89ea63c8 3188 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3189
e76a9f53 3190 my $aliases = $vmfw_conf->{aliases};
89ea63c8 3191 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e76a9f53 3192
89ea63c8 3193 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
1210ae94 3194
8824b2f0 3195 my $rules = $vmfw_conf->{rules} || [];
89ea63c8 3196 if ($rules && scalar(@$rules)) {
464f933e
DM		 3197 $raw .= "[RULES]\n\n";
3198 $raw .= &$format_rules($rules, 1);
3199 $raw .= "\n";
3200 }
3201
21053409 3202 my $filename = "$pvefw_conf_dir/$vmid.fw";
c32e04e6
FG		 3203 if ($raw) {
3204 mkdir $pvefw_conf_dir;
3205 PVE::Tools::file_set_contents($filename, $raw);
3206 } else {
3207 unlink $filename;
3208 }
464f933e
DM		 3209}
3210
edee9035
AG		 3211sub remove_vmfw_conf {
3212 my ($vmid) = @_;
3213
3214 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3215
3216 unlink $vmfw_conffile;
3217}
3218
5471ff7c
AG		 3219sub clone_vmfw_conf {
3220 my ($vmid, $newid) = @_;
3221
3222 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3223 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3224
3225 if (-f $clonevm_conffile) {
3226 unlink $clonevm_conffile;
3227 }
3228 if (-f $sourcevm_conffile) {
3229 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3230 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3231 }
3232}
3233
6fc63ffd 3234sub read_vm_firewall_configs {
40af93c4 3235 my ($cluster_conf, $vmdata, $dir) = @_;
8aef5177 3236
6fc63ffd 3237 my $vmfw_configs = {};
c8301d63 3238
b6b8e6ad 3239 foreach my $vmid (keys %{$vmdata->{qemu}}) {
40af93c4 3240 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
b6b8e6ad
DM		 3241 next if !$vmfw_conf->{options}; # skip if file does not exists
3242 $vmfw_configs->{$vmid} = $vmfw_conf;
3243 }
3b4882dc 3244 foreach my $vmid (keys %{$vmdata->{lxc}}) {
40af93c4 3245 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3b4882dc
AG		 3246 next if !$vmfw_conf->{options}; # skip if file does not exists
3247 $vmfw_configs->{$vmid} = $vmfw_conf;
3248 }
5e1267a5 3249
6fc63ffd 3250 return $vmfw_configs;
5e1267a5
DM		 3251}
3252
2d404ffc
DM		 3253sub get_option_log_level {
3254 my ($options, $k) = @_;
3255
3256 my $v = $options->{$k};
178a63be 3257 $v = $default_log_level if !defined($v);
2d404ffc
DM		 3258
3259 return undef if $v eq '' || $v eq 'nolog';
3260
3489f8a2 3261 return $v if defined($log_level_hash->{$v});
2d404ffc
DM		 3262
3263 warn "unknown log level ($k = '$v')\n";
3264
3265 return undef;
3266}
3267
d8f2505e 3268sub generate_std_chains {
db8a955f
DM		 3269 my ($ruleset, $options, $ipversion) = @_;
3270
3271 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
cbb5d6f3 3272
2d404ffc 3273 my $loglevel = get_option_log_level($options, 'smurf_log_level');
044409e5
TW		 3274 my $chain = 'PVEFW-smurflog';
3275 if ( $std_chains->{$chain} ) {
3276 foreach my $r (@{$std_chains->{$chain}}) {
3277 $r->{log} = $loglevel;
3278 }
db8a955f 3279 }
2d404ffc
DM		 3280
3281 # same as shorewall logflags action.
3282 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 3283 $chain = 'PVEFW-logflags';
044409e5
TW		 3284 if ( $std_chains->{$chain} ) {
3285 foreach my $r (@{$std_chains->{$chain}}) {
3286 $r->{log} = $loglevel;
3287 }
3288 }
d8f2505e 3289
db8a955f 3290 foreach my $chain (keys %$std_chains) {
d8f2505e 3291 ruleset_create_chain($ruleset, $chain);
db8a955f 3292 foreach my $rule (@{$std_chains->{$chain}}) {
d8f2505e 3293 if (ref($rule)) {
3489f8a2 3294 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
d8f2505e 3295 } else {
044409e5 3296 die "rule $rule as string - should not happen";
d8f2505e
DM		 3297 }
3298 }
3299 }
3300}
3301
34cdedfa 3302sub generate_ipset_chains {
74601077 3303 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
34cdedfa 3304
74601077 3305 foreach my $ipset (keys %{$ipsets}) {
34cdedfa 3306
74601077 3307 my $options = $ipsets->{$ipset};
34cdedfa 3308
ebf72e49
WB		 3309 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3310 if (my $ips = $device_ips->{$1}) {
3311 $options = [@$options, @$ips];
3312 }
3313 }
3314
88c26d5e
DM		 3315 # remove duplicates
3316 my $nethash = {};
3317 foreach my $entry (@$options) {
3318 next if $entry->{errors}; # skip entries with errors
3319 eval {
3320 my ($cidr, $ver);
3321 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3322 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3323 } else {
3324 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3325 }
3326 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3327 if ($ver == 6) {
e0a9139f
WB		 3328 # ip_compress_address takes an address only, no CIDR
3329 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3330 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3331 $cidr .= $prefix_len if defined($prefix_len);
88c26d5e
DM		 3332 $cidr =~ s|/128$||;
3333 } else {
3334 $cidr =~ s|/32$||;
3335 }
34cdedfa 3336
88c26d5e
DM		 3337 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3338 };
3339 warn $@ if $@;
3340 }
6d959e3f 3341
88c26d5e
DM		 3342 foreach my $ipversion (4, 6) {
3343 my $data = $nethash->{$ipversion};
30f1b100 3344
88c26d5e 3345 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
6d959e3f 3346
88c26d5e
DM		 3347 my $hashsize = scalar(@$options);
3348 if ($hashsize <= 64) {
3349 $hashsize = 64;
3350 } else {
3351 $hashsize = round_powerof2($hashsize);
3352 }
6d959e3f 3353
88c26d5e 3354 my $family = $ipversion == "6" ? "inet6" : "inet";
30f1b100 3355
88c26d5e 3356 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
6d959e3f 3357
88c26d5e
DM		 3358 foreach my $cidr (sort keys %$data) {
3359 my $entry = $data->{$cidr};
6d959e3f 3360
88c26d5e
DM		 3361 my $cmd = "add $name $cidr";
3362 if ($entry->{nomatch}) {
3363 if ($feature_ipset_nomatch) {
3364 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3365 } else {
3366 warn "ignore !$cidr - nomatch not supported by kernel\n";
3367 }
6d959e3f 3368 } else {
88c26d5e 3369 push @{$ipset_ruleset->{$name}}, $cmd;
6d959e3f 3370 }
9d6f90e6 3371 }
9d6f90e6 3372 }
34cdedfa 3373 }
2a052ee3
AD		 3374}
3375
3376sub round_powerof2 {
dd7a13fd 3377 my ($int) = @_;
2a052ee3 3378
dd7a13fd
DM		 3379 $int--;
3380 $int |= $int >> $_ foreach (1,2,4,8,16);
3381 return ++$int;
34cdedfa
AD		 3382}
3383
cc37e000
TL		 3384my $set_global_log_ratelimit = sub {
3385 my $cluster_opts = shift;
3386
3387 $global_log_ratelimit = '--limit 1/sec';
3388 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3389 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3390 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3391
3392 if ($limit->{enable}) {
3393 if (my $rate = $limit->{rate}) {
3394 $global_log_ratelimit = "--limit $rate";
3395 }
3396 if (my $burst = $limit->{burst}) {
3397 $global_log_ratelimit .= " --limit-burst $burst";
3398 }
3399 } else {
3400 $global_log_ratelimit = undef;
3401 }
3402 }
3403};
3404
fca39c2c 3405sub load_clusterfw_conf {
40af93c4 3406 my ($filename) = @_;
8aef5177
DM		 3407
3408 $filename = $clusterfw_conf_filename if !defined($filename);
585ede43
TL		 3409 my $empty_conf = {
3410 rules => [],
3411 options => {},
3412 aliases => {},
3413 groups => {},
3414 group_comments => {},
3415 ipset => {} ,
3416 ipset_comments => {},
3417 };
530c005e 3418
585ede43
TL		 3419 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3420 $set_global_log_ratelimit->($cluster_conf->{options});
5e1267a5 3421
fca39c2c 3422 return $cluster_conf;
e5d76bde
DM		 3423}
3424
fca39c2c
DM		 3425sub save_clusterfw_conf {
3426 my ($cluster_conf) = @_;
9c7e0858
DM		 3427
3428 my $raw = '';
9c7e0858 3429
c6f5cc88 3430 my $options = $cluster_conf->{options};
89ea63c8 3431 $raw .= &$format_options($options) if $options && scalar(keys %$options);
9c7e0858 3432
0d5f0a0f 3433 my $aliases = $cluster_conf->{aliases};
89ea63c8 3434 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e34d0e58 3435
89ea63c8 3436 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
1210ae94 3437
c6f5cc88 3438 my $rules = $cluster_conf->{rules};
89ea63c8 3439 if ($rules && scalar(@$rules)) {
c6f5cc88 3440 $raw .= "[RULES]\n\n";
63c91681 3441 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 3442 $raw .= "\n";
3443 }
3444
89ea63c8
DM		 3445 if ($cluster_conf->{groups}) {
3446 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3447 my $rules = $cluster_conf->{groups}->{$group};
3448 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3449 my $utf8comment = encode('utf8', $comment);
3450 $raw .= "[group $group] # $utf8comment\n\n";
3451 } else {
3452 $raw .= "[group $group]\n\n";
3453 }
0d22acb3 3454
89ea63c8
DM		 3455 $raw .= &$format_rules($rules, 0);
3456 $raw .= "\n";
3457 }
9c7e0858
DM		 3458 }
3459
c32e04e6
FG		 3460 if ($raw) {
3461 mkdir $pvefw_conf_dir;
3462 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3463 } else {
3464 unlink $clusterfw_conf_filename;
3465 }
9c7e0858
DM		 3466}
3467
8b27beb9 3468sub load_hostfw_conf {
40af93c4 3469 my ($cluster_conf, $filename) = @_;
8aef5177
DM		 3470
3471 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9 3472
585ede43
TL		 3473 my $empty_conf = { rules => [], options => {}};
3474 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
8b27beb9
DM		 3475}
3476
63c91681
DM		 3477sub save_hostfw_conf {
3478 my ($hostfw_conf) = @_;
3479
3480 my $raw = '';
3481
3482 my $options = $hostfw_conf->{options};
89ea63c8 3483 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3484
63c91681 3485 my $rules = $hostfw_conf->{rules};
89ea63c8 3486 if ($rules && scalar(@$rules)) {
63c91681
DM		 3487 $raw .= "[RULES]\n\n";
3488 $raw .= &$format_rules($rules, 1);
3489 $raw .= "\n";
3490 }
3491
c32e04e6
FG		 3492 if ($raw) {
3493 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3494 } else {
3495 unlink $hostfw_conf_filename;
3496 }
63c91681
DM		 3497}
3498
e5d76bde 3499sub compile {
06208a01 3500 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3dfa8a7f 3501
8aef5177
DM		 3502 my $vmfw_configs;
3503
cfd7cd9c
TW		 3504 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3505 $pve_std_chains = dclone($pve_std_chains_conf);
3506
8aef5177
DM		 3507 if ($vmdata) { # test mode
3508 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3509 my $filename = "$testdir/cluster.fw";
40af93c4 3510 $cluster_conf = load_clusterfw_conf($filename);
8aef5177
DM		 3511
3512 $filename = "$testdir/host.fw";
40af93c4 3513 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
8aef5177 3514
40af93c4 3515 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
8aef5177 3516 } else { # normal operation
40af93c4 3517 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
8aef5177 3518
40af93c4 3519 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
8aef5177 3520
06208a01 3521 # cfs_update is handled by daemon or API
328d1e87
SR		 3522 $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3523 if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
06208a01 3524
8aef5177 3525 $vmdata = read_local_vm_config();
40af93c4 3526 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
8aef5177 3527 }
3dfa8a7f 3528
84025e99 3529 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
9268573a 3530
525778d7
DM		 3531 my $localnet;
3532 if ($cluster_conf->{aliases}->{local_network}) {
3533 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3534 } else {
afcd29b3
DM		 3535 my $localnet_ver;
3536 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3537
84025e99 3538 $cluster_conf->{aliases}->{local_network} = {
afcd29b3 3539 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
525778d7
DM		 3540 }
3541
3542 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
bfc488f6 3543
06208a01
SR		 3544 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3545 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
40af93c4 3546 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
147dd882
WB		 3547 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3548
c5e8b008 3549 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
147dd882
WB		 3550}
3551
3552sub compile_iptables_filter {
06208a01 3553 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
085fd492 3554
3fa83edf
DM		 3555 my $ruleset = {};
3556
dec84fcd
DM		 3557 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3558 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 3559
fadb13dd 3560 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 3561
8b27beb9 3562 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 3563
88733a74
AD		 3564 # fixme: what log level should we use here?
3565 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3566
b409c8a8
TL		 3567 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3568 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
88733a74 3569
e2943485 3570 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
88c26d5e 3571 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
e2943485 3572
1e9c5070 3573 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
e2943485
DM		 3574
3575 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
1e9c5070 3576 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
e2943485 3577
db8a955f 3578 generate_std_chains($ruleset, $hostfw_options, $ipversion);
fadb13dd 3579
6d2ab017 3580 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 3581
35d1d6da 3582 if ($hostfw_enable) {
06208a01 3583 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
1a9978ed
DM		 3584 warn $@ if $@; # just to be sure - should not happen
3585 }
3fa83edf 3586
6158271d 3587 # generate firewall rules for QEMU VMs
0a0ba19e 3588 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
1a9978ed
DM		 3589 eval {
3590 my $conf = $vmdata->{qemu}->{$vmid};
3591 my $vmfw_conf = $vmfw_configs->{$vmid};
3592 return if !$vmfw_conf;
1a9978ed 3593
0a0ba19e 3594 foreach my $netid (sort keys %$conf) {
1a9978ed
DM		 3595 next if $netid !~ m/^net(\d+)$/;
3596 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3597 next if !$net->{firewall};
3598 my $iface = "tap${vmid}i$1";
3599
3600 my $macaddr = $net->{macaddr};
3601 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
84870b1a 3602 $vmfw_conf, $vmid, 'IN', $ipversion);
1a9978ed 3603 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
84870b1a 3604 $vmfw_conf, $vmid, 'OUT', $ipversion);
1a9978ed
DM		 3605 }
3606 };
3607 warn $@ if $@; # just to be sure - should not happen
3fa83edf 3608 }
c8301d63 3609
3b4882dc 3610 # generate firewall rules for LXC containers
0a0ba19e 3611 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3b4882dc
AG		 3612 eval {
3613 my $conf = $vmdata->{lxc}->{$vmid};
3614 my $vmfw_conf = $vmfw_configs->{$vmid};
3615 return if !$vmfw_conf;
3616
3b4882dc 3617 if ($vmfw_conf->{options}->{enable}) {
0a0ba19e 3618 foreach my $netid (sort keys %$conf) {
3b4882dc 3619 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3620 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3b4882dc
AG		 3621 next if !$net->{firewall};
3622 my $iface = "veth${vmid}i$1";
3623 my $macaddr = $net->{hwaddr};
3624 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3625 $vmfw_conf, $vmid, 'IN', $ipversion);
3626 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3627 $vmfw_conf, $vmid, 'OUT', $ipversion);
3628 }
3629 }
3630 };
3631 warn $@ if $@; # just to be sure - should not happen
3632 }
3633
097820b0 3634 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
1e9c5070 3635 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
097820b0
AD		 3636 }
3637
147dd882
WB		 3638 return $ruleset;
3639}
3640
ebf72e49
WB		 3641sub mac_to_linklocal {
3642 my ($macaddr) = @_;
3643 my @parts = split(/:/, $macaddr);
3644 # The standard link local address uses the fe80::/64 prefix with the
3645 # modified EUI-64 identifier derived from the MAC address by flipping the
3646 # universal/local bit and inserting FF:FE in the middle.
3647 # See RFC 4291.
3648 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3649 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3650 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3651}
3652
147dd882
WB		 3653sub compile_ipsets {
3654 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3655
3656 my $localnet;
3657 if ($cluster_conf->{aliases}->{local_network}) {
3658 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3659 } else {
3660 my $localnet_ver;
3661 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3662
3663 $cluster_conf->{aliases}->{local_network} = {
3664 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3665 }
3666
3667 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3668
3669
3670 my $ipset_ruleset = {};
3671
3672 # generate ipsets for QEMU VMs
3673 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3674 eval {
3675 my $conf = $vmdata->{qemu}->{$vmid};
3676 my $vmfw_conf = $vmfw_configs->{$vmid};
3677 return if !$vmfw_conf;
3678
74601077
WB		 3679 # When the 'ipfilter' option is enabled every device for which there
3680 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3681 # ipset.
3682 # The reason is that ipfilter ipsets are always filled with standard
3683 # IPv6 link-local filters.
3684 my $ipsets = $vmfw_conf->{ipset};
3685 my $implicit_sets = {};
3686
ebf72e49
WB		 3687 my $device_ips = {};
3688 foreach my $netid (keys %$conf) {
3689 next if $netid !~ m/^net(\d+)$/;
3690 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3691 next if !$net->{firewall};
3692
74601077
WB		 3693 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3694 $implicit_sets->{"ipfilter-$netid"} = [];
3695 }
3696
ebf72e49
WB		 3697 my $macaddr = $net->{macaddr};
3698 my $linklocal = mac_to_linklocal($macaddr);
3699 $device_ips->{$netid} = [
3700 { cidr => $linklocal },
3701 { cidr => 'fe80::/10', nomatch => 1 }
3702 ];
3703 }
3704
74601077
WB		 3705 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3706 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
147dd882
WB		 3707 };
3708 warn $@ if $@; # just to be sure - should not happen
3709 }
3710
3711 # generate firewall rules for LXC containers
3712 foreach my $vmid (keys %{$vmdata->{lxc}}) {
aa229652
WB		 3713 eval {
3714 my $conf = $vmdata->{lxc}->{$vmid};
3715 my $vmfw_conf = $vmfw_configs->{$vmid};
3716 return if !$vmfw_conf;
147dd882 3717
74601077
WB		 3718 # When the 'ipfilter' option is enabled every device for which there
3719 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3720 # ipset.
3721 # The reason is that ipfilter ipsets are always filled with standard
383fe679
WB		 3722 # IPv6 link-local filters, as well as the IP addresses configured
3723 # for the container.
74601077
WB		 3724 my $ipsets = $vmfw_conf->{ipset};
3725 my $implicit_sets = {};
3726
ebf72e49
WB		 3727 my $device_ips = {};
3728 foreach my $netid (keys %$conf) {
3729 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3730 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
ebf72e49
WB		 3731 next if !$net->{firewall};
3732
74601077
WB		 3733 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3734 $implicit_sets->{"ipfilter-$netid"} = [];
3735 }
3736
ebf72e49
WB		 3737 my $macaddr = $net->{hwaddr};
3738 my $linklocal = mac_to_linklocal($macaddr);
383fe679 3739 my $set = $device_ips->{$netid} = [
ebf72e49
WB		 3740 { cidr => $linklocal },
3741 { cidr => 'fe80::/10', nomatch => 1 }
3742 ];
37ef1ce1 3743 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
383fe679
WB		 3744 push @$set, { cidr => $1 };
3745 }
37ef1ce1 3746 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
383fe679
WB		 3747 push @$set, { cidr => $1 };
3748 }
ebf72e49
WB		 3749 }
3750
74601077
WB		 3751 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3752 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
aa229652
WB		 3753 };
3754 warn $@ if $@; # just to be sure - should not happen
147dd882
WB		 3755 }
3756
74601077 3757 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
27083984 3758
147dd882 3759 return $ipset_ruleset;
3fa83edf
DM		 3760}
3761
c5e8b008 3762sub compile_ebtables_filter {
40af93c4 3763 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
c5e8b008 3764
2549e7ef 3765 if (!($cluster_conf->{options}->{ebtables} // 1)) {
84025e99
SI		 3766 return {};
3767 }
c5e8b008
AD		 3768
3769 my $ruleset = {};
3770
3771 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3772
c5e8b008
AD		 3773 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3774 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3775 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3776 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3777 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3778
3779 # generate firewall rules for QEMU VMs
2e30c5c7 3780 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
c5e8b008
AD		 3781 eval {
3782 my $conf = $vmdata->{qemu}->{$vmid};
3783 my $vmfw_conf = $vmfw_configs->{$vmid};
3784 return if !$vmfw_conf;
401c141b 3785 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3786
4a1072dd 3787 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3788 next if $netid !~ m/^net(\d+)$/;
3789 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3790 next if !$net->{firewall};
3791 my $iface = "tap${vmid}i$1";
3792 my $macaddr = $net->{macaddr};
401c141b
AD		 3793 my $arpfilter = [];
3794 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3795 foreach my $ipaddr (@$ipset) {
3796 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3797 next if !$ip || ($version && $version != 4);
3798 push(@$arpfilter, $ip);
3799 }
3800 }
3801 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3802 }
3803 };
3804 warn $@ if $@; # just to be sure - should not happen
3805 }
3806
3807 # generate firewall rules for LXC containers
2e30c5c7 3808 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
c5e8b008
AD		 3809 eval {
3810 my $conf = $vmdata->{lxc}->{$vmid};
3811
3812 my $vmfw_conf = $vmfw_configs->{$vmid};
3813 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
401c141b 3814 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3815
4a1072dd 3816 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3817 next if $netid !~ m/^net(\d+)$/;
3818 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3819 next if !$net->{firewall};
3820 my $iface = "veth${vmid}i$1";
3821 my $macaddr = $net->{hwaddr};
401c141b
AD		 3822 my $arpfilter = [];
3823 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3824 foreach my $ipaddr (@$ipset) {
3825 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3826 next if !$ip || ($version && $version != 4);
3827 push(@$arpfilter, $ip);
3828 }
3829 }
03984808 3830 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
a9068b2d
TL		 3831 # ebtables changes this to a .0/MASK network but we just
3832 # want the address here, no network - see #2193
255698f6
TL		 3833 $ip =~ s|/(\d+)$||;
3834 push @$arpfilter, $ip;
556ae5c1 3835 }
401c141b 3836 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3837 }
3838 };
3839 warn $@ if $@; # just to be sure - should not happen
3840 }
3841
3842 return $ruleset;
3843}
3844
3845sub generate_tap_layer2filter {
401c141b 3846 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
c5e8b008
AD		 3847 my $options = $vmfw_conf->{options};
3848
3849 my $tapchain = $iface."-OUT";
3850
3851 # ebtables remove zeros from mac pairs
3852 $macaddr =~ s/0([0-9a-f])/$1/ig;
3853 $macaddr = lc($macaddr);
3854
3855 ruleset_create_chain($ruleset, $tapchain);
3856
3857 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3858 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3859 }
3860
401c141b
AD		 3861 if (@$arpfilter){
3862 my $arpchain = $tapchain."-ARP";
3863 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3864 ruleset_create_chain($ruleset, $arpchain);
3865
3866 foreach my $ip (@{$arpfilter}) {
3867 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3868 }
3869 ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3870 }
3871
c5e8b008 3872 if (defined($options->{layer2_protocols})){
33efd363
AD		 3873 my $protochain = $tapchain."-PROTO";
3874 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3875 ruleset_create_chain($ruleset, $protochain);
3876
c5e8b008 3877 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
33efd363 3878 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
c5e8b008 3879 }
33efd363 3880 ruleset_addrule($ruleset, $protochain, '', '-j DROP');
c5e8b008
AD		 3881 }
3882
33efd363
AD		 3883 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3884
c5e8b008
AD		 3885 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3886}
3887
84025e99
SI		 3888# the parameter $change_only_regex changes two things if defined:
3889# * all chains not matching it will be left intact
3890# * both the $active_chains hash and the returned status_hash have different
3891# structure (they contain a key named 'rules').
3fa83edf 3892sub get_ruleset_status {
40af93c4 3893 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3fa83edf
DM		 3894
3895 my $statushash = {};
3896
3897 foreach my $chain (sort keys %$ruleset) {
84025e99
SI		 3898 my $rules = $ruleset->{$chain};
3899 my $sig = &$digest_fn($rules);
3900 my $oldsig;
9bf7d929 3901
3fa83edf 3902 $statushash->{$chain}->{sig} = $sig;
84025e99
SI		 3903 if (defined($change_only_regex)) {
3904 $oldsig = $active_chains->{$chain}->{sig};
3905 $statushash->{$chain}->{rules} = $rules;
3906 } else {
3907 $oldsig = $active_chains->{$chain};
3908 }
3fa83edf
DM		 3909 if (!defined($oldsig)) {
3910 $statushash->{$chain}->{action} = 'create';
3911 } else {
3912 if ($oldsig eq $sig) {
3913 $statushash->{$chain}->{action} = 'exists';
3914 } else {
3915 $statushash->{$chain}->{action} = 'update';
3916 }
3917 }
84025e99
SI		 3918 if ($verbose) {
3919 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3920 foreach my $cmd (@{$rules}) {
3921 print "\t$cmd\n";
3922 }
3fa83edf
DM		 3923 }
3924 }
3925
3926 foreach my $chain (sort keys %$active_chains) {
84025e99
SI		 3927 next if defined($ruleset->{$chain});
3928 my $action = 'delete';
d9551052 3929 my $sig = $active_chains->{$chain};
84025e99
SI		 3930 if (defined($change_only_regex)) {
3931 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3932 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
d9551052 3933 $sig = $sig->{sig};
84025e99 3934 }
84025e99
SI		 3935 $statushash->{$chain}->{action} = $action;
3936 $statushash->{$chain}->{sig} = $sig;
3937 print "$action $chain ($sig)\n" if $verbose;
6158271d 3938 }
2a052ee3 3939
3fa83edf
DM		 3940 return $statushash;
3941}
3942
3fa83edf
DM		 3943sub print_sig_rule {
3944 my ($chain, $sig) = @_;
3945
09d5f68e
DM		 3946 # We just use this to store a SHA1 checksum used to detect changes
3947 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 3948}
3949
df7cb349 3950sub get_ruleset_cmdlist {
40af93c4 3951 my ($ruleset, $iptablescmd) = @_;
3fa83edf 3952
3fa83edf 3953 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 3954
17da5c0f 3955 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
40af93c4 3956 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 3957
3958 # create missing chains first
3959 foreach my $chain (sort keys %$ruleset) {
3960 my $stat = $statushash->{$chain};
3961 die "internal error" if !$stat;
3962 next if $stat->{action} ne 'create';
886aba9c 3963
3fa83edf
DM		 3964 $cmdlist .= ":$chain - [0:0]\n";
3965 }
3966
4bd0a9c4 3967 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
55fad3b7
DM		 3968 my $chain = "PVEFW-$h";
3969 if ($ruleset->{$chain} && !$hooks->{$h}) {
3970 $cmdlist .= "-A $h -j $chain\n";
4bd0a9c4 3971 }
3fa83edf
DM		 3972 }
3973
3974 foreach my $chain (sort keys %$ruleset) {
3975 my $stat = $statushash->{$chain};
3976 die "internal error" if !$stat;
3977
3978 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3979 $cmdlist .= "-F $chain\n";
3980 foreach my $cmd (@{$ruleset->{$chain}}) {
3981 $cmdlist .= "$cmd\n";
3982 }
3983 $cmdlist .= print_sig_rule($chain, $stat->{sig});
3984 } elsif ($stat->{action} eq 'delete') {
f5d28682 3985 die "internal error"; # this should not happen
3fa83edf
DM		 3986 } elsif ($stat->{action} eq 'exists') {
3987 # do nothing
3988 } else {
3989 die "internal error - unknown status '$stat->{action}'";
3990 }
3991 }
3992
f5d28682
DM		 3993 foreach my $chain (keys %$statushash) {
3994 next if $statushash->{$chain}->{action} ne 'delete';
3995 $cmdlist .= "-F $chain\n";
3996 }
3997 foreach my $chain (keys %$statushash) {
3998 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 3999 next if $chain eq 'PVEFW-INPUT';
4000 next if $chain eq 'PVEFW-OUTPUT';
4001 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 4002 $cmdlist .= "-X $chain\n";
4003 }
4004
3f95d14a 4005 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 4006
3fa83edf
DM		 4007 $cmdlist .= "COMMIT\n";
4008
3f95d14a 4009 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 4010}
4011
d4a23c88 4012my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
84025e99 4013
151c209e 4014sub get_ebtables_cmdlist {
40af93c4 4015 my ($ruleset) = @_;
151c209e
AD		 4016
4017 my $changes = 0;
4018 my $cmdlist = "*filter\n";
4019
84025e99
SI		 4020 my $active_chains = ebtables_get_chains();
4021 my $statushash = get_ruleset_status($ruleset, $active_chains,
40af93c4 4022 \&iptables_chain_digest,
84025e99 4023 $pve_ebtables_chainname_regex);
151c209e 4024
84025e99
SI		 4025 # create chains first and make sure PVE rules are evaluated if active
4026 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4027 my $pve_include = 0;
4028 foreach my $chain (sort keys %$statushash) {
4029 next if ($statushash->{$chain}->{action} eq 'delete');
151c209e 4030 $cmdlist .= ":$chain ACCEPT\n";
84025e99 4031 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
151c209e
AD		 4032 }
4033
84025e99 4034 foreach my $chain (sort keys %$statushash) {
151c209e 4035 my $stat = $statushash->{$chain};
84025e99 4036 $changes = 1 if ($stat->{action} !~ 'ignore|exists');
defdf28e 4037 next if ($stat->{action} eq 'delete');
151c209e 4038
84025e99
SI		 4039 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4040 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4041 next if ! $pve_include;
4042 $pve_include = 0;
4043 }
151c209e
AD		 4044 $cmdlist .= "$cmd\n";
4045 }
4046 }
84025e99 4047 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
151c209e
AD		 4048
4049 return wantarray ? ($cmdlist, $changes) : $cmdlist;
4050}
4051
34cdedfa 4052sub get_ipset_cmdlist {
40af93c4 4053 my ($ruleset) = @_;
34cdedfa
AD		 4054
4055 my $cmdlist = "";
4056
dd7a13fd
DM		 4057 my $delete_cmdlist = "";
4058
4bd0a9c4 4059 my $active_chains = ipset_get_chains();
40af93c4 4060 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
34cdedfa 4061
e34d0e58 4062 # remove stale _swap chains
30f1b100
DM		 4063 foreach my $chain (keys %$active_chains) {
4064 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4065 $cmdlist .= "destroy $chain\n";
4066 }
4067 }
4068
c69cf614 4069 foreach my $chain (keys %$ruleset) {
c69cf614
DM		 4070 my $stat = $statushash->{$chain};
4071 die "internal error" if !$stat;
4072
4073 if ($stat->{action} eq 'create') {
4074 foreach my $cmd (@{$ruleset->{$chain}}) {
4075 $cmdlist .= "$cmd\n";
4076 }
4077 }
4078 }
4079
4080 foreach my $chain (keys %$ruleset) {
6d959e3f
DM		 4081 my $stat = $statushash->{$chain};
4082 die "internal error" if !$stat;
34cdedfa 4083
dd7a13fd
DM		 4084 if ($stat->{action} eq 'update') {
4085 my $chain_swap = $chain."_swap";
cbb5d6f3 4086
dd7a13fd
DM		 4087 foreach my $cmd (@{$ruleset->{$chain}}) {
4088 $cmd =~ s/$chain/$chain_swap/;
4089 $cmdlist .= "$cmd\n";
34cdedfa 4090 }
dd7a13fd
DM		 4091 $cmdlist .= "swap $chain_swap $chain\n";
4092 $cmdlist .= "flush $chain_swap\n";
4093 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 4094 }
dd7a13fd 4095 }
3f95d14a 4096
88c26d5e 4097 # the remove unused chains
c69cf614 4098 foreach my $chain (keys %$statushash) {
dd7a13fd 4099 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 4100
dd7a13fd
DM		 4101 $delete_cmdlist .= "flush $chain\n";
4102 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 4103 }
4104
dd7a13fd 4105 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 4106
dd7a13fd 4107 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 4108}
4109
6b9f68a2 4110sub apply_ruleset {
40af93c4 4111 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
6b9f68a2
DM		 4112
4113 enable_bridge_firewall();
4114
cbb5d6f3 4115 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
40af93c4 4116 get_ipset_cmdlist($ipset_ruleset);
6b9f68a2 4117
40af93c4
TL		 4118 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4119 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4120 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
2a052ee3 4121
81a0bf43
DM		 4122 if ($verbose) {
4123 if ($ipset_changes) {
4124 print "ipset changes:\n";
4125 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4126 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4127 }
3f95d14a 4128
81a0bf43
DM		 4129 if ($changes) {
4130 print "iptables changes:\n";
4131 print $cmdlist;
4132 }
17da5c0f
AD		 4133
4134 if ($changesv6) {
4135 print "ip6tables changes:\n";
4136 print $cmdlistv6;
4137 }
151c209e
AD		 4138
4139 if ($ebtables_changes) {
4140 print "ebtables changes:\n";
4141 print $ebtables_cmdlist;
4142 }
81a0bf43 4143 }
3fa83edf 4144
259db1e6
DM		 4145 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4146 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4147
2a052ee3 4148 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 4149
259db1e6
DM		 4150 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4151 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4152
3fa83edf 4153 iptables_restore_cmdlist($cmdlist);
259db1e6
DM		 4154
4155 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4156 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4157
17da5c0f 4158 ip6tables_restore_cmdlist($cmdlistv6);
3fa83edf 4159
259db1e6
DM		 4160 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4161 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4162
dd7a13fd 4163 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 4164
151c209e
AD		 4165 ebtables_restore_cmdlist($ebtables_cmdlist);
4166
4167 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4168 PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4169
6158271d 4170 # test: re-read status and check if everything is up to date
4bd0a9c4 4171 my $active_chains = iptables_get_chains();
40af93c4 4172 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 4173
4174 my $errors;
4175 foreach my $chain (sort keys %$ruleset) {
4176 my $stat = $statushash->{$chain};
4177 if ($stat->{action} ne 'exists') {
4178 warn "unable to update chain '$chain'\n";
4179 $errors = 1;
4180 }
4181 }
b6360c3f 4182
17da5c0f 4183 my $active_chainsv6 = iptables_get_chains("ip6tables");
40af93c4 4184 my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
17da5c0f
AD		 4185
4186 foreach my $chain (sort keys %$rulesetv6) {
4187 my $stat = $statushashv6->{$chain};
4188 if ($stat->{action} ne 'exists') {
4189 warn "unable to update chain '$chain'\n";
4190 $errors = 1;
4191 }
4192 }
4193
151c209e 4194 my $active_ebtables_chains = ebtables_get_chains();
84025e99
SI		 4195 my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4196 $active_ebtables_chains, \&iptables_chain_digest,
40af93c4 4197 $pve_ebtables_chainname_regex);
151c209e
AD		 4198
4199 foreach my $chain (sort keys %$ebtables_ruleset) {
4200 my $stat = $ebtables_statushash->{$chain};
4201 if ($stat->{action} ne 'exists') {
4202 warn "ebtables : unable to update chain '$chain'\n";
4203 $errors = 1;
4204 }
4205 }
4206
3fa83edf 4207 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 4208
4209 update_nf_conntrack_max($hostfw_conf);
4210
4211 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4212
6c27f4f3 4213 update_nf_conntrack_logging($hostfw_conf);
b6360c3f
DM		 4214}
4215
490cdead
DM		 4216sub update_nf_conntrack_max {
4217 my ($hostfw_conf) = @_;
4218
4219 my $max = 65536; # reasonable default
4220
4221 my $options = $hostfw_conf->{options} || {};
4222
4223 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4224 $max = $options->{nf_conntrack_max};
4225 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4226 }
4227
4228 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4229 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4230
4231 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4232
4233 if ($current != $max) {
4234 my $hashsize = int($max/4);
4235 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4236 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4237 }
4238}
4239
28c082a1
AD		 4240sub update_nf_conntrack_tcp_timeout_established {
4241 my ($hostfw_conf) = @_;
4242
4243 my $options = $hostfw_conf->{options} || {};
4244
4245 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4246
4247 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4248}
4249
6c27f4f3
DL		 4250my $log_nf_conntrack_enabled = undef;
4251sub update_nf_conntrack_logging {
4252 my ($hostfw_conf) = @_;
4253
4254 my $options = $hostfw_conf->{options} || {};
4255 my $value = $options->{log_nf_conntrack} || 0;
4256 if (!defined($log_nf_conntrack_enabled)
4257 || $value != $log_nf_conntrack_enabled)
4258 {
4259 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4260 PVE::Tools::file_set_contents($tmpfile, $value);
4261
c1031ab1 4262 run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
6c27f4f3
DL		 4263 $log_nf_conntrack_enabled = $value;
4264 }
4265}
4266
c4a2e5ae
DM		 4267sub remove_pvefw_chains {
4268
7b7b2654
AD		 4269 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4270 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4271 PVE::Firewall::remove_pvefw_chains_ipset();
0e8af63d 4272 PVE::Firewall::remove_pvefw_chains_ebtables();
7b7b2654
AD		 4273
4274}
4275
4276sub remove_pvefw_chains_iptables {
4277 my ($iptablescmd) = @_;
4278
4279 my ($chash, $hooks) = iptables_get_chains($iptablescmd);
c4a2e5ae
DM		 4280 my $cmdlist = "*filter\n";
4281
4282 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4283 if ($hooks->{$h}) {
4284 $cmdlist .= "-D $h -j PVEFW-$h\n";
4285 }
4286 }
cbb5d6f3 4287
c4a2e5ae
DM		 4288 foreach my $chain (keys %$chash) {
4289 $cmdlist .= "-F $chain\n";
4290 }
4291
4292 foreach my $chain (keys %$chash) {
4293 $cmdlist .= "-X $chain\n";
4294 }
4295 $cmdlist .= "COMMIT\n";
4296
7b7b2654
AD		 4297 if($iptablescmd eq "ip6tables") {
4298 ip6tables_restore_cmdlist($cmdlist);
4299 } else {
4300 iptables_restore_cmdlist($cmdlist);
4301 }
4302}
4303
4304sub remove_pvefw_chains_ipset {
55fad3b7
DM		 4305
4306 my $ipset_chains = ipset_get_chains();
4307
7b7b2654 4308 my $cmdlist = "";
55fad3b7
DM		 4309
4310 foreach my $chain (keys %$ipset_chains) {
88c26d5e
DM		 4311 $cmdlist .= "flush $chain\n";
4312 $cmdlist .= "destroy $chain\n";
55fad3b7
DM		 4313 }
4314
7b7b2654 4315 ipset_restore_cmdlist($cmdlist) if $cmdlist;
c4a2e5ae
DM		 4316}
4317
0e8af63d
FG		 4318sub remove_pvefw_chains_ebtables {
4319 # apply empty ruleset = remove all our chains
4320 ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4321}
4322
8b453a09
DM		 4323sub init {
4324 my $cluster_conf = load_clusterfw_conf();
4325 my $cluster_options = $cluster_conf->{options};
4326 my $enable = $cluster_options->{enable};
4327
4328 return if !$enable;
4329
4330 # load required modules here
4331}
4332
6b9f68a2 4333sub update {
6b9f68a2 4334 my $code = sub {
3dfa8a7f
DM		 4335
4336 my $cluster_conf = load_clusterfw_conf();
4337 my $cluster_options = $cluster_conf->{options};
4338
55fad3b7 4339 if (!$cluster_options->{enable}) {
b22130d3 4340 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 4341 return;
4342 }
4343
50f9a28d 4344 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3dfa8a7f 4345
c5e8b008 4346 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
490cdead 4347
151c209e 4348 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
6b9f68a2
DM		 4349 };
4350
4351 run_locked($code);
4352}
4353
b6360c3f 43541;
Firewall test scripts