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fix use of uninitialized value
[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)",
a44539a3 217 # Legacy port for protocol v1
06ba9c44 218 { action => 'PARAM', proto => 'tcp', dport => '6789' },
a44539a3
CE		 219 # New port for protocol v2
220 { action => 'PARAM', proto => 'tcp', dport => '3300' },
06ba9c44
AG		 221 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
222 ],
857f62c8 223 'CVS' => [
ebd54ae9 224 "Concurrent Versions System pserver traffic",
857f62c8
DM		 225 { action => 'PARAM', proto => 'tcp', dport => '2401' },
226 ],
227 'Citrix' => [
ebd54ae9 228 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 229 { action => 'PARAM', proto => 'tcp', dport => '1494' },
230 { action => 'PARAM', proto => 'udp', dport => '1604' },
231 { action => 'PARAM', proto => 'tcp', dport => '2598' },
232 ],
233 'DAAP' => [
ebd54ae9 234 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 235 { action => 'PARAM', proto => 'tcp', dport => '3689' },
236 { action => 'PARAM', proto => 'udp', dport => '3689' },
237 ],
238 'DCC' => [
ebd54ae9 239 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 240 { action => 'PARAM', proto => 'tcp', dport => '6277' },
241 ],
242 'DHCPfwd' => [
d2c3266d 243 "Forwarded DHCP traffic",
857f62c8 244 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 245 ],
246 'DNS' => [
ebd54ae9 247 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 248 { action => 'PARAM', proto => 'udp', dport => '53' },
249 { action => 'PARAM', proto => 'tcp', dport => '53' },
250 ],
251 'Distcc' => [
ebd54ae9 252 "Distributed Compiler service",
857f62c8
DM		 253 { action => 'PARAM', proto => 'tcp', dport => '3632' },
254 ],
857f62c8 255 'FTP' => [
ebd54ae9 256 "File Transfer Protocol",
857f62c8
DM		 257 { action => 'PARAM', proto => 'tcp', dport => '21' },
258 ],
259 'Finger' => [
ebd54ae9 260 "Finger protocol (RFC 742)",
857f62c8
DM		 261 { action => 'PARAM', proto => 'tcp', dport => '79' },
262 ],
263 'GNUnet' => [
ebd54ae9 264 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 265 { action => 'PARAM', proto => 'tcp', dport => '2086' },
266 { action => 'PARAM', proto => 'udp', dport => '2086' },
267 { action => 'PARAM', proto => 'tcp', dport => '1080' },
268 { action => 'PARAM', proto => 'udp', dport => '1080' },
269 ],
270 'GRE' => [
d2c3266d 271 "Generic Routing Encapsulation tunneling protocol",
857f62c8 272 { action => 'PARAM', proto => '47' },
857f62c8
DM		 273 ],
274 'Git' => [
ebd54ae9 275 "Git distributed revision control traffic",
857f62c8
DM		 276 { action => 'PARAM', proto => 'tcp', dport => '9418' },
277 ],
857f62c8 278 'HKP' => [
ebd54ae9 279 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 280 { action => 'PARAM', proto => 'tcp', dport => '11371' },
281 ],
282 'HTTP' => [
ebd54ae9 283 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 284 { action => 'PARAM', proto => 'tcp', dport => '80' },
285 ],
857f62c8 286 'HTTPS' => [
ebd54ae9 287 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 288 { action => 'PARAM', proto => 'tcp', dport => '443' },
289 ],
290 'ICPV2' => [
ebd54ae9 291 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 292 { action => 'PARAM', proto => 'udp', dport => '3130' },
293 ],
294 'ICQ' => [
ebd54ae9 295 "AOL Instant Messenger traffic",
857f62c8
DM		 296 { action => 'PARAM', proto => 'tcp', dport => '5190' },
297 ],
298 'IMAP' => [
ebd54ae9 299 "Internet Message Access Protocol",
857f62c8
DM		 300 { action => 'PARAM', proto => 'tcp', dport => '143' },
301 ],
302 'IMAPS' => [
ebd54ae9 303 "Internet Message Access Protocol over SSL",
857f62c8
DM		 304 { action => 'PARAM', proto => 'tcp', dport => '993' },
305 ],
306 'IPIP' => [
d2c3266d 307 "IPIP capsulation traffic",
857f62c8 308 { action => 'PARAM', proto => '94' },
857f62c8 309 ],
857f62c8 310 'IPsec' => [
d2c3266d 311 "IPsec traffic",
857f62c8
DM		 312 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
313 { action => 'PARAM', proto => '50' },
857f62c8
DM		 314 ],
315 'IPsecah' => [
d2c3266d 316 "IPsec authentication (AH) traffic",
857f62c8
DM		 317 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
318 { action => 'PARAM', proto => '51' },
857f62c8
DM		 319 ],
320 'IPsecnat' => [
d2c3266d 321 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 322 { action => 'PARAM', proto => 'udp', dport => '500' },
323 { action => 'PARAM', proto => 'udp', dport => '4500' },
324 { action => 'PARAM', proto => '50' },
857f62c8
DM		 325 ],
326 'IRC' => [
ebd54ae9 327 "Internet Relay Chat traffic",
857f62c8
DM		 328 { action => 'PARAM', proto => 'tcp', dport => '6667' },
329 ],
857f62c8 330 'Jetdirect' => [
ebd54ae9 331 "HP Jetdirect printing",
857f62c8
DM		 332 { action => 'PARAM', proto => 'tcp', dport => '9100' },
333 ],
334 'L2TP' => [
ebd54ae9 335 "Layer 2 Tunneling Protocol traffic",
857f62c8 336 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 337 ],
338 'LDAP' => [
ebd54ae9 339 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 340 { action => 'PARAM', proto => 'tcp', dport => '389' },
341 ],
342 'LDAPS' => [
ebd54ae9 343 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 344 { action => 'PARAM', proto => 'tcp', dport => '636' },
345 ],
346 'MSNP' => [
ebd54ae9 347 "Microsoft Notification Protocol",
857f62c8
DM		 348 { action => 'PARAM', proto => 'tcp', dport => '1863' },
349 ],
350 'MSSQL' => [
ebd54ae9 351 "Microsoft SQL Server",
857f62c8
DM		 352 { action => 'PARAM', proto => 'tcp', dport => '1433' },
353 ],
354 'Mail' => [
ebd54ae9 355 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 356 { action => 'PARAM', proto => 'tcp', dport => '25' },
357 { action => 'PARAM', proto => 'tcp', dport => '465' },
358 { action => 'PARAM', proto => 'tcp', dport => '587' },
359 ],
7831e1e3
EK		 360 'MDNS' => [
361 "Multicast DNS",
362 { action => 'PARAM', proto => 'udp', dport => '5353' },
363 ],
857f62c8 364 'Munin' => [
ebd54ae9 365 "Munin networked resource monitoring traffic",
857f62c8
DM		 366 { action => 'PARAM', proto => 'tcp', dport => '4949' },
367 ],
368 'MySQL' => [
ebd54ae9 369 "MySQL server",
857f62c8
DM		 370 { action => 'PARAM', proto => 'tcp', dport => '3306' },
371 ],
372 'NNTP' => [
ebd54ae9 373 "NNTP traffic (Usenet).",
857f62c8
DM		 374 { action => 'PARAM', proto => 'tcp', dport => '119' },
375 ],
376 'NNTPS' => [
ebd54ae9 377 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 378 { action => 'PARAM', proto => 'tcp', dport => '563' },
379 ],
380 'NTP' => [
ebd54ae9 381 "Network Time Protocol (ntpd)",
857f62c8
DM		 382 { action => 'PARAM', proto => 'udp', dport => '123' },
383 ],
857f62c8 384 'OSPF' => [
ebd54ae9 385 "OSPF multicast traffic",
857f62c8
DM		 386 { action => 'PARAM', proto => '89' },
387 ],
388 'OpenVPN' => [
ebd54ae9 389 "OpenVPN traffic",
857f62c8
DM		 390 { action => 'PARAM', proto => 'udp', dport => '1194' },
391 ],
392 'PCA' => [
ebd54ae9 393 "Symantec PCAnywere (tm)",
857f62c8
DM		 394 { action => 'PARAM', proto => 'udp', dport => '5632' },
395 { action => 'PARAM', proto => 'tcp', dport => '5631' },
396 ],
397 'POP3' => [
ebd54ae9 398 "POP3 traffic",
857f62c8
DM		 399 { action => 'PARAM', proto => 'tcp', dport => '110' },
400 ],
401 'POP3S' => [
ebd54ae9 402 "Encrypted POP3 traffic",
857f62c8
DM		 403 { action => 'PARAM', proto => 'tcp', dport => '995' },
404 ],
405 'PPtP' => [
ebd54ae9 406 "Point-to-Point Tunneling Protocol",
857f62c8 407 { action => 'PARAM', proto => '47' },
857f62c8
DM		 408 { action => 'PARAM', proto => 'tcp', dport => '1723' },
409 ],
410 'Ping' => [
ebd54ae9 411 "ICMP echo request",
269d4f13 412 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 413 ],
414 'PostgreSQL' => [
ebd54ae9 415 "PostgreSQL server",
857f62c8
DM		 416 { action => 'PARAM', proto => 'tcp', dport => '5432' },
417 ],
418 'Printer' => [
ebd54ae9 419 "Line Printer protocol printing",
857f62c8
DM		 420 { action => 'PARAM', proto => 'tcp', dport => '515' },
421 ],
422 'RDP' => [
ebd54ae9 423 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 424 { action => 'PARAM', proto => 'tcp', dport => '3389' },
425 ],
d2c3266d 426 'RIP' => [
ebd54ae9 427 "Routing Information Protocol (bidirectional)",
857f62c8 428 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 429 ],
430 'RNDC' => [
ebd54ae9 431 "BIND remote management protocol",
857f62c8
DM		 432 { action => 'PARAM', proto => 'tcp', dport => '953' },
433 ],
434 'Razor' => [
ebd54ae9 435 "Razor Antispam System",
056f9211 436 { action => 'PARAM', proto => 'tcp', dport => '2703' },
857f62c8
DM		 437 ],
438 'Rdate' => [
ebd54ae9 439 "Remote time retrieval (rdate)",
857f62c8
DM		 440 { action => 'PARAM', proto => 'tcp', dport => '37' },
441 ],
442 'Rsync' => [
ebd54ae9 443 "Rsync server",
857f62c8
DM		 444 { action => 'PARAM', proto => 'tcp', dport => '873' },
445 ],
446 'SANE' => [
ebd54ae9 447 "SANE network scanning",
857f62c8
DM		 448 { action => 'PARAM', proto => 'tcp', dport => '6566' },
449 ],
450 'SMB' => [
ebd54ae9 451 "Microsoft SMB traffic",
857f62c8
DM		 452 { action => 'PARAM', proto => 'udp', dport => '135,445' },
453 { action => 'PARAM', proto => 'udp', dport => '137:139' },
454 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
455 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
456 ],
857f62c8 457 'SMBswat' => [
ebd54ae9 458 "Samba Web Administration Tool",
857f62c8
DM		 459 { action => 'PARAM', proto => 'tcp', dport => '901' },
460 ],
461 'SMTP' => [
ebd54ae9 462 "Simple Mail Transfer Protocol",
857f62c8
DM		 463 { action => 'PARAM', proto => 'tcp', dport => '25' },
464 ],
465 'SMTPS' => [
ebd54ae9 466 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 467 { action => 'PARAM', proto => 'tcp', dport => '465' },
468 ],
469 'SNMP' => [
ebd54ae9 470 "Simple Network Management Protocol",
857f62c8
DM		 471 { action => 'PARAM', proto => 'udp', dport => '161:162' },
472 { action => 'PARAM', proto => 'tcp', dport => '161' },
473 ],
474 'SPAMD' => [
ebd54ae9 475 "Spam Assassin SPAMD traffic",
857f62c8
DM		 476 { action => 'PARAM', proto => 'tcp', dport => '783' },
477 ],
478 'SSH' => [
ebd54ae9 479 "Secure shell traffic",
857f62c8
DM		 480 { action => 'PARAM', proto => 'tcp', dport => '22' },
481 ],
482 'SVN' => [
ebd54ae9 483 "Subversion server (svnserve)",
857f62c8
DM		 484 { action => 'PARAM', proto => 'tcp', dport => '3690' },
485 ],
486 'SixXS' => [
ebd54ae9 487 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 488 { action => 'PARAM', proto => 'tcp', dport => '3874' },
489 { action => 'PARAM', proto => 'udp', dport => '3740' },
490 { action => 'PARAM', proto => '41' },
491 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
492 ],
493 'Squid' => [
ebd54ae9 494 "Squid web proxy traffic",
857f62c8
DM		 495 { action => 'PARAM', proto => 'tcp', dport => '3128' },
496 ],
497 'Submission' => [
ebd54ae9 498 "Mail message submission traffic",
857f62c8
DM		 499 { action => 'PARAM', proto => 'tcp', dport => '587' },
500 ],
501 'Syslog' => [
ebd54ae9 502 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 503 { action => 'PARAM', proto => 'udp', dport => '514' },
504 { action => 'PARAM', proto => 'tcp', dport => '514' },
505 ],
506 'TFTP' => [
ebd54ae9 507 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 508 { action => 'PARAM', proto => 'udp', dport => '69' },
509 ],
510 'Telnet' => [
ebd54ae9 511 "Telnet traffic",
857f62c8
DM		 512 { action => 'PARAM', proto => 'tcp', dport => '23' },
513 ],
514 'Telnets' => [
ebd54ae9 515 "Telnet over SSL",
857f62c8
DM		 516 { action => 'PARAM', proto => 'tcp', dport => '992' },
517 ],
518 'Time' => [
ebd54ae9 519 "RFC 868 Time protocol",
857f62c8
DM		 520 { action => 'PARAM', proto => 'tcp', dport => '37' },
521 ],
522 'Trcrt' => [
ebd54ae9 523 "Traceroute (for up to 30 hops) traffic",
857f62c8 524 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 525 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 526 ],
527 'VNC' => [
93be4333
DM		 528 "VNC traffic for VNC display's 0 - 99",
529 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
857f62c8
DM		 530 ],
531 'VNCL' => [
ebd54ae9 532 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 533 { action => 'PARAM', proto => 'tcp', dport => '5500' },
534 ],
535 'Web' => [
ebd54ae9 536 "WWW traffic (HTTP and HTTPS)",
857f62c8 537 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 538 { action => 'PARAM', proto => 'tcp', dport => '443' },
539 ],
857f62c8 540 'Webcache' => [
ebd54ae9 541 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 542 { action => 'PARAM', proto => 'tcp', dport => '8080' },
543 ],
544 'Webmin' => [
ebd54ae9 545 "Webmin traffic",
857f62c8
DM		 546 { action => 'PARAM', proto => 'tcp', dport => '10000' },
547 ],
548 'Whois' => [
ebd54ae9 549 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 550 { action => 'PARAM', proto => 'tcp', dport => '43' },
551 ],
961b4928
DM		 552};
553
554my $pve_fw_parsed_macros;
ebd54ae9 555my $pve_fw_macro_descr;
21a18e53 556my $pve_fw_macro_ipversion = {};
961b4928 557my $pve_fw_preferred_macro_names = {};
3a616aa0 558
fe3d79b4
WB		 559my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
560my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
561
5547adf7 562my $pve_std_chains = {};
cfd7cd9c
TW		 563my $pve_std_chains_conf = {};
564$pve_std_chains_conf->{4} = {
d8f2505e 565 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 566 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
d8f2505e 567 ],
79929d9c
DM		 568 'PVEFW-DropBroadcast' => [
569 # same as shorewall 'Broadcast'
570 # simply DROP BROADCAST/MULTICAST/ANYCAST
571 # we can use this to reduce logging
572 { action => 'DROP', dsttype => 'BROADCAST' },
573 { action => 'DROP', dsttype => 'MULTICAST' },
574 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 575 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 576 ],
577 'PVEFW-reject' => [
578 # same as shorewall 'reject'
579 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 580 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c 581 { action => 'DROP', proto => 'icmp' },
044409e5
TW		 582 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
583 { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
584 { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
585 { target => '-j REJECT --reject-with icmp-host-prohibited' },
79929d9c
DM		 586 ],
587 'PVEFW-Drop' => [
cbb5d6f3 588 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 589 # but REJECT/DROP some packages to reduce logging,
590 # and ACCEPT critical ICMP types
591 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
592 # we are not interested in BROADCAST/MULTICAST/ANYCAST
593 { action => 'PVEFW-DropBroadcast' },
594 # ACCEPT critical ICMP types
595 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
596 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
597 # Drop packets with INVALID state
044409e5 598 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 599 # Drop Microsoft SMB noise
e4882cff
TW		 600 { action => 'DROP', proto => 'udp', dport => '135,445' },
601 { action => 'DROP', proto => 'udp', dport => '137:139' },
79929d9c 602 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 603 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 604 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
605 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 606 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 607 # Drop DNS replies
608 { action => 'DROP', proto => 'udp', sport => 53 },
609 ],
610 'PVEFW-Reject' => [
cbb5d6f3 611 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 612 # but REJECT/DROP some packages to reduce logging,
613 # and ACCEPT critical ICMP types
614 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
615 # we are not interested in BROADCAST/MULTICAST/ANYCAST
616 { action => 'PVEFW-DropBroadcast' },
617 # ACCEPT critical ICMP types
618 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
619 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
620 # Drop packets with INVALID state
044409e5 621 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 622 # Drop Microsoft SMB noise
e4882cff 623 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
79929d9c
DM		 624 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
625 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 626 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 627 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
628 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 629 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 630 # Drop DNS replies
631 { action => 'DROP', proto => 'udp', sport => 53 },
632 ],
d86659ef
DM		 633 'PVEFW-tcpflags' => [
634 # same as shorewall tcpflags action.
635 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
044409e5
TW		 636 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
637 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
638 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
639 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
640 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
d86659ef 641 ],
bee633ab
DM		 642 'PVEFW-smurfs' => [
643 # same as shorewall smurfs action
644 # Filter packets for smurfs (packets with a broadcast address as the source).
044409e5
TW		 645 { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
646 { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
647 { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
648 ],
649 'PVEFW-smurflog' => [
650 { action => 'DROP', logmsg => 'DROP: ' },
651 ],
652 'PVEFW-logflags' => [
653 { action => 'DROP', logmsg => 'DROP: ' },
bee633ab 654 ],
d8f2505e
DM		 655};
656
cfd7cd9c 657$pve_std_chains_conf->{6} = {
47a79ff2 658 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 659 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
47a79ff2
AD		 660 ],
661 'PVEFW-DropBroadcast' => [
044409e5
TW		 662 # same as shorewall 'Broadcast'
663 # simply DROP BROADCAST/MULTICAST/ANYCAST
664 # we can use this to reduce logging
665 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
649cd835
DM		 666 # ipv6 addrtype does not work with kernel 2.6.32
667 #{ action => 'DROP', dsttype => 'MULTICAST' },
044409e5
TW		 668 #{ action => 'DROP', dsttype => 'ANYCAST' },
669 { action => 'DROP', dest => 'ff00::/8' },
670 #{ action => 'DROP', dest => '224.0.0.0/4' },
47a79ff2
AD		 671 ],
672 'PVEFW-reject' => [
649cd835 673 { action => 'DROP', proto => 'icmpv6' },
044409e5 674 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
58ca8ec0
AD		 675 { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
676 { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
47a79ff2
AD		 677 ],
678 'PVEFW-Drop' => [
044409e5
TW		 679 # same as shorewall 'Drop', which is equal to DROP,
680 # but REJECT/DROP some packages to reduce logging,
681 # and ACCEPT critical ICMP types
649cd835 682 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
044409e5
TW		 683 # we are not interested in BROADCAST/MULTICAST/ANYCAST
684 { action => 'PVEFW-DropBroadcast' },
685 # ACCEPT critical ICMP types
686 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
687 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
688 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
689 # Drop packets with INVALID state
690 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
691 # Drop Microsoft SMB noise
e4882cff 692 { action => 'DROP', proto => 'udp', dport => '135,445' },
649cd835
DM		 693 { action => 'DROP', proto => 'udp', dport => '137:139'},
694 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 695 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
649cd835 696 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
044409e5
TW		 697 # Drop new/NotSyn traffic so that it doesn't get logged
698 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
699 # Drop DNS replies
649cd835 700 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 701 ],
702 'PVEFW-Reject' => [
044409e5
TW		 703 # same as shorewall 'Reject', which is equal to Reject,
704 # but REJECT/DROP some packages to reduce logging,
705 # and ACCEPT critical ICMP types
706 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
707 # we are not interested in BROADCAST/MULTICAST/ANYCAST
708 { action => 'PVEFW-DropBroadcast' },
709 # ACCEPT critical ICMP types
710 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
711 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
712 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
713 # Drop packets with INVALID state
714 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
715 # Drop Microsoft SMB noise
e4882cff
TW		 716 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
717 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
044409e5 718 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 719 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
044409e5
TW		 720 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
721 # Drop new/NotSyn traffic so that it doesn't get logged
722 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
723 # Drop DNS replies
724 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 725 ],
726 'PVEFW-tcpflags' => [
044409e5
TW		 727 # same as shorewall tcpflags action.
728 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
729 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
730 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
731 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
732 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
733 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
734 ],
735 'PVEFW-logflags' => [
736 { action => 'DROP', logmsg => 'DROP: ' },
47a79ff2 737 ],
47a79ff2
AD		 738};
739
4b586518
DM		 740# iptables -p icmp -h
741my $icmp_type_names = {
742 any => 1,
743 'echo-reply' => 1,
744 'destination-unreachable' => 1,
745 'network-unreachable' => 1,
746 'host-unreachable' => 1,
747 'protocol-unreachable' => 1,
748 'port-unreachable' => 1,
749 'fragmentation-needed' => 1,
750 'source-route-failed' => 1,
751 'network-unknown' => 1,
752 'host-unknown' => 1,
753 'network-prohibited' => 1,
754 'host-prohibited' => 1,
755 'TOS-network-unreachable' => 1,
756 'TOS-host-unreachable' => 1,
757 'communication-prohibited' => 1,
758 'host-precedence-violation' => 1,
759 'precedence-cutoff' => 1,
760 'source-quench' => 1,
761 'redirect' => 1,
762 'network-redirect' => 1,
763 'host-redirect' => 1,
764 'TOS-network-redirect' => 1,
765 'TOS-host-redirect' => 1,
766 'echo-request' => 1,
767 'router-advertisement' => 1,
768 'router-solicitation' => 1,
769 'time-exceeded' => 1,
770 'ttl-zero-during-transit' => 1,
771 'ttl-zero-during-reassembly' => 1,
772 'parameter-problem' => 1,
773 'ip-header-bad' => 1,
774 'required-option-missing' => 1,
775 'timestamp-request' => 1,
776 'timestamp-reply' => 1,
777 'address-mask-request' => 1,
778 'address-mask-reply' => 1,
779};
780
041b9277
DM		 781# ip6tables -p icmpv6 -h
782
783my $icmpv6_type_names = {
784 'any' => 1,
785 'destination-unreachable' => 1,
786 'no-route' => 1,
787 'communication-prohibited' => 1,
788 'address-unreachable' => 1,
789 'port-unreachable' => 1,
790 'packet-too-big' => 1,
791 'time-exceeded' => 1,
792 'ttl-zero-during-transit' => 1,
793 'ttl-zero-during-reassembly' => 1,
794 'parameter-problem' => 1,
795 'bad-header' => 1,
796 'unknown-header-type' => 1,
797 'unknown-option' => 1,
798 'echo-request' => 1,
799 'echo-reply' => 1,
800 'router-solicitation' => 1,
801 'router-advertisement' => 1,
593604cc 802 'neighbor-solicitation' => 1,
041b9277 803 'neighbour-solicitation' => 1,
593604cc 804 'neighbor-advertisement' => 1,
041b9277
DM		 805 'neighbour-advertisement' => 1,
806 'redirect' => 1,
807};
808
54cd19a8 809sub init_firewall_macros {
6158271d 810
961b4928 811 $pve_fw_parsed_macros = {};
9aab3127 812
21a18e53
WB		 813 my $parse = sub {
814 my ($k, $macro) = @_;
e5076eee 815 my $lc_name = lc($k);
21a18e53
WB		 816 $pve_fw_macro_ipversion->{$k} = 0;
817 while (!ref($macro->[0])) {
818 my $desc = shift @$macro;
819 if ($desc eq 'ipv4only') {
820 $pve_fw_macro_ipversion->{$k} = 4;
821 } elsif ($desc eq 'ipv6only') {
822 $pve_fw_macro_ipversion->{$k} = 6;
823 } else {
824 $pve_fw_macro_descr->{$k} = $desc;
825 }
ebd54ae9 826 }
e5076eee
DM		 827 $pve_fw_preferred_macro_names->{$lc_name} = $k;
828 $pve_fw_parsed_macros->{$k} = $macro;
21a18e53
WB		 829 };
830
831 foreach my $k (keys %$pve_fw_macros) {
832 &$parse($k, $pve_fw_macros->{$k});
833 }
834
835 foreach my $k (keys %$pve_ipv6fw_macros) {
836 next if $pve_fw_parsed_macros->{$k};
837 &$parse($k, $pve_ipv6fw_macros->{$k});
838 $pve_fw_macro_ipversion->{$k} = 6;
961b4928 839 }
9aab3127
DM		 840}
841
54cd19a8
DM		 842init_firewall_macros();
843
ebd54ae9
DM		 844sub get_macros {
845 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
846}
847
fcba0beb
DM		 848my $etc_services;
849
850sub get_etc_services {
851
852 return $etc_services if $etc_services;
853
854 my $filename = "/etc/services";
855
856 my $fh = IO::File->new($filename, O_RDONLY);
857 if (!$fh) {
858 warn "unable to read '$filename' - $!\n";
859 return {};
860 }
861
862 my $services = {};
863
864 while (my $line = <$fh>) {
865 chomp ($line);
866 next if $line =~m/^#/;
867 next if ($line =~m/^\s*$/);
868
d50f24ea 869 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
fcba0beb 870 $services->{byid}->{$2}->{name} = $1;
35b66e9d 871 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 872 $services->{byid}->{$2}->{$3} = 1;
873 $services->{byname}->{$1} = $services->{byid}->{$2};
874 }
875 }
876
877 close($fh);
878
6158271d
DM		 879 $etc_services = $services;
880
3a616aa0 881
fcba0beb
DM		 882 return $etc_services;
883}
884
58bc569d
WB		 885sub parse_protocol_file {
886 my ($filename) = @_;
fcba0beb
DM		 887
888 my $fh = IO::File->new($filename, O_RDONLY);
889 if (!$fh) {
890 warn "unable to read '$filename' - $!\n";
891 return {};
892 }
893
894 my $protocols = {};
895
896 while (my $line = <$fh>) {
897 chomp ($line);
898 next if $line =~m/^#/;
899 next if ($line =~m/^\s*$/);
900
d6dd6e96 901 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
fcba0beb
DM		 902 $protocols->{byid}->{$2}->{name} = $1;
903 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
904 }
905 }
906
907 close($fh);
908
58bc569d
WB		 909 return $protocols;
910}
911
912my $etc_protocols;
913
914sub get_etc_protocols {
915 return $etc_protocols if $etc_protocols;
916
917 my $protocols = parse_protocol_file('/etc/protocols');
918
041b9277
DM		 919 # add special case for ICMP v6
920 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
921 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
922
fcba0beb
DM		 923 $etc_protocols = $protocols;
924
925 return $etc_protocols;
926}
927
b452ea10
WB		 928my $etc_ethertypes;
929
930sub get_etc_ethertypes {
931 $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
932 if !$etc_ethertypes;
933 return $etc_ethertypes;
934}
935
525778d7 936my $__local_network;
93be4333 937
525778d7 938sub local_network {
ac633d30 939 my ($new_value) = @_;
93be4333 940
525778d7 941 $__local_network = $new_value if defined($new_value);
ac633d30 942
525778d7 943 return $__local_network if defined($__local_network);
93be4333
DM		 944
945 eval {
946 my $nodename = PVE::INotify::nodename();
947
948 my $ip = PVE::Cluster::remote_node_ip($nodename);
949
950 my $testip = Net::IP->new($ip);
bfc488f6 951
5dc356af
WB		 952 my $isv6 = $testip->version == 6;
953 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
954 : PVE::ProcFSTools::read_proc_net_route();
93be4333 955 foreach my $entry (@$routes) {
5dc356af
WB		 956 my $mask;
957 if ($isv6) {
958 $mask = $entry->{prefix};
15c80000 959 next if !$mask; # skip the default route...
5dc356af 960 } else {
2e1ae6b9 961 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
5dc356af
WB		 962 next if !defined($mask);
963 }
93be4333
DM		 964 my $cidr = "$entry->{dest}/$mask";
965 my $testnet = Net::IP->new($cidr);
15c80000
WB		 966 my $overlap = $testnet->overlaps($testip);
967 if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
968 $overlap == $Net::IP::IP_IDENTICAL)
969 {
525778d7 970 $__local_network = $cidr;
93be4333
DM		 971 return;
972 }
973 }
974 };
975 warn $@ if $@;
976
525778d7 977 return $__local_network;
93be4333
DM		 978}
979
6d959e3f
DM		 980# ipset names are limited to 31 characters,
981# and we use '-v4' or '-v6' to indicate IP versions,
982# and we use '_swap' suffix for atomic update,
983# for example PVEFW-${VMID}-${ipset_name}_swap
30150dca 984
88c26d5e 985my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
708ba714
DM		 986
987sub compute_ipset_chain_name {
88c26d5e 988 my ($vmid, $ipset_name, $ipversion) = @_;
708ba714
DM		 989
990 $vmid = 0 if !defined($vmid);
991
88c26d5e 992 my $id = "$vmid-${ipset_name}-v$ipversion";
708ba714 993
88c26d5e 994 if (length($id) > $max_iptables_ipset_name_length) {
708ba714
DM		 995 $id = PVE::Tools::fnv31a_hex($id);
996 }
997
998 return "PVEFW-$id";
999}
1000
b692f42c
DM		 1001sub compute_ipfilter_ipset_name {
1002 my ($iface) = @_;
1003
1004 return "ipfilter-$iface";
1005}
1006
ecbea048
DM		 1007sub parse_address_list {
1008 my ($str) = @_;
1009
e2c62733
DM		 1010 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1011 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1012 return;
1013 }
1014
1015 if ($str =~ m/^${ip_alias_pattern}$/) {
1016 die "alias name too long\n" if length($str) > $max_alias_name_length;
1017 return;
1018 }
d72beb8e 1019
3162af6b
DM		 1020 my $count = 0;
1021 my $iprange = 0;
a589b6ac 1022 my $ipversion;
7697c041 1023
55b47371
WB		 1024 my @elements = split(/,/, $str);
1025 die "extraneous commas in list\n" if $str ne join(',', @elements);
1026 foreach my $elem (@elements) {
3162af6b 1027 $count++;
c344e509
DM		 1028 my $ip = Net::IP->new($elem);
1029 if (!$ip) {
ecbea048
DM		 1030 my $err = Net::IP::Error();
1031 die "invalid IP address: $err\n";
1032 }
3162af6b 1033 $iprange = 1 if $elem =~ m/-/;
a589b6ac 1034
c344e509 1035 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
a589b6ac
DM		 1036
1037 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
006490cb 1038 if $ipversion && ($new_ipversion != $ipversion);
a589b6ac
DM		 1039
1040 $ipversion = $new_ipversion;
ecbea048 1041 }
e34d0e58 1042
5163367b 1043 die "you can't use a range in a list\n" if $iprange && $count > 1;
a589b6ac 1044
7697c041 1045 return $ipversion;
ecbea048 1046}
dddd9413 1047
fcba0beb 1048sub parse_port_name_number_or_range {
a1c04f71 1049 my ($str, $dport) = @_;
fcba0beb
DM		 1050
1051 my $services = PVE::Firewall::get_etc_services();
7ca36671 1052 my $count = 0;
041b7e8e
DM		 1053 my $icmp_port = 0;
1054
55b47371
WB		 1055 my @elements = split(/,/, $str);
1056 die "extraneous commas in list\n" if $str ne join(',', @elements);
1057 foreach my $item (@elements) {
aced7e7d 1058 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
6a241ca7 1059 $count += 2;
7ca36671
DM		 1060 my ($port1, $port2) = ($1, $2);
1061 die "invalid port '$port1'\n" if $port1 > 65535;
1062 die "invalid port '$port2'\n" if $port2 > 65535;
12be0dfe 1063 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
aced7e7d 1064 } elsif ($item =~ m/^([0-9]+)$/) {
6a241ca7 1065 $count += 1;
7ca36671
DM		 1066 my $port = $1;
1067 die "invalid port '$port'\n" if $port > 65535;
1068 } else {
a1c04f71 1069 if ($dport && $icmp_type_names->{$item}) {
041b7e8e 1070 $icmp_port = 1;
a1c04f71 1071 } elsif ($dport && $icmpv6_type_names->{$item}) {
041b9277 1072 $icmp_port = 1;
041b7e8e 1073 } else {
e34d0e58 1074 die "invalid port '$item'\n" if !$services->{byname}->{$item};
041b7e8e 1075 }
fcba0beb
DM		 1076 }
1077 }
1078
6a241ca7
WB		 1079 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1080
1081 # I really don't like to use the word number here, but it's the only thing
1082 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1083 # one and not as 100...
1084 die "too many entries in port list (> 15 numbers)\n"
1085 if $count > 15;
041b7e8e 1086
f776d6de 1087 return (scalar(@elements) > 1);
fcba0beb
DM		 1088}
1089
a1c04f71
WB		 1090PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1091sub pve_fw_verify_sport_spec {
1092 my ($portstr) = @_;
1093
1094 parse_port_name_number_or_range($portstr, 0);
1095
1096 return $portstr;
1097}
1098
1099PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1100sub pve_fw_verify_dport_spec {
54cd19a8
DM		 1101 my ($portstr) = @_;
1102
a1c04f71 1103 parse_port_name_number_or_range($portstr, 1);
54cd19a8
DM		 1104
1105 return $portstr;
1106}
1107
d31689ee
DM		 1108PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1109sub pve_fw_verify_addr_spec {
54cd19a8
DM		 1110 my ($list) = @_;
1111
1112 parse_address_list($list);
1113
1114 return $list;
1115}
1116
1117PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1118sub pve_fw_verify_protocol_spec {
1119 my ($proto) = @_;
1120
1121 my $protocols = get_etc_protocols();
1122
1123 die "unknown protocol '$proto'\n" if $proto &&
1124 !(defined($protocols->{byname}->{$proto}) ||
1125 defined($protocols->{byid}->{$proto}));
1126
1127 return $proto;
1128}
1129
1130
d1c53b3e 1131# helper function for API
d1c53b3e 1132
5d38d64f
DM		 1133sub copy_opject_with_digest {
1134 my ($object) = @_;
1135
1136 my $sha = Digest::SHA->new('sha1');
1137
1138 my $res = {};
1139 foreach my $k (sort keys %$object) {
1140 my $v = $object->{$k};
0365eb68 1141 next if !defined($v);
5d38d64f
DM		 1142 $res->{$k} = $v;
1143 $sha->add($k, ':', $v, "\n");
1144 }
1145
55e686c7 1146 my $digest = $sha->hexdigest;
5d38d64f
DM		 1147
1148 $res->{digest} = $digest;
1149
1150 return wantarray ? ($res, $digest) : $res;
1151}
1152
1153sub copy_list_with_digest {
1154 my ($list) = @_;
1155
1156 my $sha = Digest::SHA->new('sha1');
1157
1158 my $res = [];
1159 foreach my $entry (@$list) {
1160 my $data = {};
1161 foreach my $k (sort keys %$entry) {
1162 my $v = $entry->{$k};
0365eb68 1163 next if !defined($v);
5d38d64f 1164 $data->{$k} = $v;
6d9246e7 1165 # Note: digest ignores refs ($rule->{errors})
e83f0d00
DC		 1166 # since Digest::SHA expects a series of bytes,
1167 # we have to encode the value here to prevent errors when
1168 # using utf8 characters (eg. in comments)
1169 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
5d38d64f
DM		 1170 }
1171 push @$res, $data;
1172 }
1173
55e686c7 1174 my $digest = $sha->hexdigest;
5d38d64f
DM		 1175
1176 foreach my $entry (@$res) {
1177 $entry->{digest} = $digest;
1178 }
1179
1180 return wantarray ? ($res, $digest) : $res;
1181}
1182
e313afe0
DM		 1183our $cluster_option_properties = {
1184 enable => {
1185 description => "Enable or disable the firewall cluster wide.",
1186 type => 'integer',
1187 minimum => 0,
1188 optional => 1,
1189 },
2549e7ef
SI		 1190 ebtables => {
1191 description => "Enable ebtables rules cluster wide.",
1192 type => 'boolean',
1193 default => 1,
1194 optional => 1,
1195 },
e313afe0
DM		 1196 policy_in => {
1197 description => "Input policy.",
1198 type => 'string',
1199 optional => 1,
1200 enum => ['ACCEPT', 'REJECT', 'DROP'],
1201 },
1202 policy_out => {
1203 description => "Output policy.",
1204 type => 'string',
1205 optional => 1,
1206 enum => ['ACCEPT', 'REJECT', 'DROP'],
1207 },
cc37e000
TL		 1208 log_ratelimit => {
1209 description => "Log ratelimiting settings",
1210 type => 'string', format => {
1211 enable => {
1212 default_key => 1,
1213 description => 'Enable or disable log rate limiting',
1214 type => 'boolean',
1215 default => '1',
1216 },
1217 rate => {
1218 type => 'string',
1219 description => 'Frequency with which the burst bucket gets refilled',
1220 optional => 1,
1221 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1222 format_description => 'rate',
1223 default => '1/second',
1224 },
1225 burst => {
1226 type => 'integer',
1227 minimum => 0,
1228 optional => 1,
1229 description => 'Inital burst of packages which will get logged',
1230 default => 5,
1231 },
1232 },
1233 optional => 1,
1234 },
e313afe0
DM		 1235};
1236
1237our $host_option_properties = {
1238 enable => {
1239 description => "Enable host firewall rules.",
1240 type => 'boolean',
1241 optional => 1,
1242 },
1243 log_level_in => get_standard_option('pve-fw-loglevel', {
1244 description => "Log level for incoming traffic." }),
1245 log_level_out => get_standard_option('pve-fw-loglevel', {
1246 description => "Log level for outgoing traffic." }),
1247 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1248 description => "Log level for illegal tcp flags filter." }),
1249 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1250 description => "Log level for SMURFS filter." }),
1251 nosmurfs => {
1252 description => "Enable SMURFS filter.",
1253 type => 'boolean',
1254 optional => 1,
1255 },
1256 tcpflags => {
1257 description => "Filter illegal combinations of TCP flags.",
1258 type => 'boolean',
1259 optional => 1,
1260 },
1261 nf_conntrack_max => {
1262 description => "Maximum number of tracked connections.",
1263 type => 'integer',
1264 optional => 1,
1265 minimum => 32768,
1266 },
1267 nf_conntrack_tcp_timeout_established => {
1268 description => "Conntrack established timeout.",
1269 type => 'integer',
1270 optional => 1,
1271 minimum => 7875,
1272 },
1273 ndp => {
1274 description => "Enable NDP.",
1275 type => 'boolean',
1276 optional => 1,
1277 },
27c49e25
CE		 1278 nf_conntrack_allow_invalid => {
1279 description => "Allow invalid packets on connection tracking.",
1280 type => 'boolean',
1281 default => 0,
1282 optional => 1,
1283 },
e17d3eec
ML		 1284 log_nf_conntrack => {
1285 description => "Enable logging of conntrack information.",
1286 type => 'boolean',
1287 default => 0,
1288 optional => 1
1289 },
e313afe0
DM		 1290};
1291
1292our $vm_option_properties = {
1293 enable => {
1294 description => "Enable/disable firewall rules.",
1295 type => 'boolean',
1296 optional => 1,
1297 },
1298 macfilter => {
1299 description => "Enable/disable MAC address filter.",
1300 type => 'boolean',
1301 optional => 1,
1302 },
1303 dhcp => {
1304 description => "Enable DHCP.",
1305 type => 'boolean',
1306 optional => 1,
1307 },
1308 ndp => {
1309 description => "Enable NDP.",
1310 type => 'boolean',
1311 optional => 1,
1312 },
1313 radv => {
1314 description => "Allow sending Router Advertisement.",
1315 type => 'boolean',
1316 optional => 1,
1317 },
1318 ipfilter => {
1319 description => "Enable default IP filters. " .
1320 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1321 "for every interface. Such ipsets implicitly contain sane default " .
1322 "restrictions such as restricting IPv6 link local addresses to " .
1323 "the one derived from the interface's MAC address. For containers " .
1324 "the configured IP addresses will be implicitly added.",
1325 type => 'boolean',
1326 optional => 1,
1327 },
1328 policy_in => {
1329 description => "Input policy.",
1330 type => 'string',
1331 optional => 1,
1332 enum => ['ACCEPT', 'REJECT', 'DROP'],
1333 },
1334 policy_out => {
1335 description => "Output policy.",
1336 type => 'string',
1337 optional => 1,
1338 enum => ['ACCEPT', 'REJECT', 'DROP'],
1339 },
1340 log_level_in => get_standard_option('pve-fw-loglevel', {
1341 description => "Log level for incoming traffic." }),
1342 log_level_out => get_standard_option('pve-fw-loglevel', {
1343 description => "Log level for outgoing traffic." }),
1344
1345};
1346
fb060a52 1347
7a332151 1348my $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 1349
7a332151 1350my $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 1351
9c7e0858
DM		 1352my $rule_properties = {
1353 pos => {
1354 description => "Update rule at position <pos>.",
1355 type => 'integer',
1356 minimum => 0,
1357 optional => 1,
1358 },
c71e785f 1359 digest => get_standard_option('pve-config-digest'),
9c7e0858 1360 type => {
e50429af 1361 description => "Rule type.",
9c7e0858
DM		 1362 type => 'string',
1363 optional => 1,
1364 enum => ['in', 'out', 'group'],
1365 },
1366 action => {
c14dacdf 1367 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
9c7e0858
DM		 1368 type => 'string',
1369 optional => 1,
44be8ceb 1370 pattern => $security_group_name_pattern,
c14dacdf
DM		 1371 maxLength => 20,
1372 minLength => 2,
9c7e0858 1373 },
e5076eee 1374 macro => {
e50429af 1375 description => "Use predefined standard macro.",
e5076eee
DM		 1376 type => 'string',
1377 optional => 1,
54cd19a8 1378 maxLength => 128,
e5076eee 1379 },
fb060a52 1380 iface => get_standard_option('pve-iface', {
7ccaa5f1 1381 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		 1382 optional => 1
1383 }),
9c7e0858 1384 source => {
fb060a52 1385 description => "Restrict packet source address. $addr_list_descr",
d31689ee 1386 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1387 optional => 1,
1388 },
1389 dest => {
fb060a52 1390 description => "Restrict packet destination address. $addr_list_descr",
d31689ee 1391 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1392 optional => 1,
1393 },
1394 proto => {
fb060a52 1395 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
54cd19a8 1396 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 1397 optional => 1,
1398 },
1399 enable => {
e50429af 1400 description => "Flag to enable/disable a rule.",
72d055fc
AG		 1401 type => 'integer',
1402 minimum => 0,
9c7e0858
DM		 1403 optional => 1,
1404 },
3489f8a2
CE		 1405 log => get_standard_option('pve-fw-loglevel', {
1406 description => "Log level for firewall rule.",
1407 }),
9c7e0858 1408 sport => {
fb060a52 1409 description => "Restrict TCP/UDP source port. $port_descr",
a1c04f71 1410 type => 'string', format => 'pve-fw-sport-spec',
9c7e0858
DM		 1411 optional => 1,
1412 },
1413 dport => {
fb060a52 1414 description => "Restrict TCP/UDP destination port. $port_descr",
a1c04f71 1415 type => 'string', format => 'pve-fw-dport-spec',
9c7e0858
DM		 1416 optional => 1,
1417 },
1418 comment => {
e50429af 1419 description => "Descriptive comment.",
9c7e0858
DM		 1420 type => 'string',
1421 optional => 1,
1422 },
1423};
1424
1425sub add_rule_properties {
1426 my ($properties) = @_;
1427
1428 foreach my $k (keys %$rule_properties) {
3655b01f
DM		 1429 my $h = $rule_properties->{$k};
1430 # copy data, so that we can modify later without side effects
1431 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 1432 }
cbb5d6f3 1433
9c7e0858
DM		 1434 return $properties;
1435}
1436
5b7974df
DM		 1437sub delete_rule_properties {
1438 my ($rule, $delete_str) = @_;
e34d0e58 1439
5b7974df
DM		 1440 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1441 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1442 if !defined($rule_properties->{$opt});
1443 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1444 if $opt eq 'type' || $opt eq 'action';
1445 delete $rule->{$opt};
1446 }
1447
1448 return $rule;
1449}
1450
9a2745a0 1451my $apply_macro = sub {
35d1d6da 1452 my ($macro_name, $param, $verify, $ipversion) = @_;
9a2745a0
DM		 1453
1454 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1455 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1456
35d1d6da
DM		 1457 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1458 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1459 }
1460
21a18e53 1461 # skip macros which are specific to another ipversion
ff5d050e
AG		 1462 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1463 return if $ipversion != $required;
1464 }
21a18e53 1465
9a2745a0
DM		 1466 my $rules = [];
1467
1468 foreach my $templ (@$macro_rules) {
1469 my $rule = {};
1470 my $param_used = {};
1471 foreach my $k (keys %$templ) {
1472 my $v = $templ->{$k};
1473 if ($v eq 'PARAM') {
1474 $v = $param->{$k};
1475 $param_used->{$k} = 1;
1476 } elsif ($v eq 'DEST') {
1477 $v = $param->{dest};
1478 $param_used->{dest} = 1;
1479 } elsif ($v eq 'SOURCE') {
1480 $v = $param->{source};
1481 $param_used->{source} = 1;
1482 }
1483
1484 if (!defined($v)) {
1485 my $msg = "missing parameter '$k' in macro '$macro_name'";
e34d0e58 1486 raise_param_exc({ macro => $msg }) if $verify;
9a2745a0
DM		 1487 die "$msg\n";
1488 }
1489 $rule->{$k} = $v;
1490 }
1491 foreach my $k (keys %$param) {
1492 next if $k eq 'macro';
1493 next if !defined($param->{$k});
1494 next if $param_used->{$k};
1495 if (defined($rule->{$k})) {
1496 if ($rule->{$k} ne $param->{$k}) {
1497 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
e34d0e58 1498 raise_param_exc({ $k => $msg }) if $verify;
9a2745a0
DM		 1499 die "$msg\n";
1500 }
1501 } else {
1502 $rule->{$k} = $param->{$k};
1503 }
1504 }
1505 push @$rules, $rule;
1506 }
1507
1508 return $rules;
1509};
1510
b6b8e6ad
DM		 1511my $rule_env_iface_lookup = {
1512 'ct' => 1,
1513 'vm' => 1,
1514 'group' => 0,
1515 'cluster' => 1,
1516 'host' => 1,
1517};
1518
7ca36671 1519sub verify_rule {
a523e057 1520 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
b6b8e6ad
DM		 1521
1522 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
bfc488f6 1523
b6b8e6ad
DM		 1524 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1525 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
7ca36671 1526
a523e057
DM		 1527 my $errors = $rule->{errors} || {};
1528
6d9246e7 1529 my $error_count = 0;
7ca36671 1530
6d9246e7
DM		 1531 my $add_error = sub {
1532 my ($param, $msg) = @_;
d4cda423 1533 chomp $msg;
6d9246e7
DM		 1534 raise_param_exc({ $param => $msg }) if !$noerr;
1535 $error_count++;
1536 $errors->{$param} = $msg if !$errors->{$param};
1537 };
1538
eea9d2a1
DM		 1539 my $ipversion;
1540 my $set_ip_version = sub {
1541 my $vers = shift;
1542 if ($vers) {
1543 die "detected mixed ipv4/ipv6 adresses in rule\n"
1544 if $ipversion && ($vers != $ipversion);
1545 $ipversion = $vers;
1546 }
1547 };
1548
a523e057 1549 my $check_ipset_or_alias_property = sub {
ae029a88 1550 my ($name, $expected_ipversion) = @_;
a523e057
DM		 1551
1552 if (my $value = $rule->{$name}) {
1553 if ($value =~ m/^\+/) {
4dfe04e6 1554 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
bfc488f6 1555 &$add_error($name, "no such ipset '$1'")
a523e057 1556 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
bfc488f6 1557
a523e057 1558 } else {
351052d1 1559 &$add_error($name, "invalid ipset name '$value'");
a523e057
DM		 1560 }
1561 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1562 my $alias = lc($value);
bfc488f6 1563 &$add_error($name, "no such alias '$value'")
70e524eb 1564 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
04f5088f 1565 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
70e524eb
AD		 1566 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1567
eea9d2a1 1568 &$set_ip_version($e->{ipversion});
a523e057
DM		 1569 }
1570 }
1571 };
1572
6d9246e7
DM		 1573 my $type = $rule->{type};
1574 my $action = $rule->{action};
bfc488f6 1575
6d9246e7
DM		 1576 &$add_error('type', "missing property") if !$type;
1577 &$add_error('action', "missing property") if !$action;
1578
1579 if ($type) {
1580 if ($type eq 'in' || $type eq 'out') {
1581 &$add_error('action', "unknown action '$action'")
1582 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1583 } elsif ($type eq 'group') {
1584 &$add_error('type', "security groups not allowed")
1585 if !$allow_groups;
1586 &$add_error('action', "invalid characters in security group name")
1587 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1588 } else {
1589 &$add_error('type', "unknown rule type '$type'");
1590 }
7ca36671 1591 }
e34d0e58 1592
dba740a9 1593 if ($rule->{iface}) {
bfc488f6 1594 &$add_error('type', "parameter -i not allowed for this rule type")
b6b8e6ad 1595 if !$allow_iface;
dba740a9 1596 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
6d9246e7 1597 &$add_error('iface', $@) if $@;
fdefeeab 1598 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
b6b8e6ad
DM		 1599 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1600 if $rule->{iface} !~ m/^net(\d+)$/;
b6b8e6ad
DM		 1601 }
1602 }
7ca36671
DM		 1603
1604 if ($rule->{macro}) {
6d9246e7
DM		 1605 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1606 $rule->{macro} = $preferred_name;
1607 } else {
1608 &$add_error('macro', "unknown macro '$rule->{macro}'");
1609 }
1610 }
1611
1612 if ($rule->{proto}) {
1613 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1614 &$add_error('proto', $@) if $@;
041b9277
DM		 1615 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1616 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
6d9246e7 1617 }
7ca36671
DM		 1618
1619 if ($rule->{dport}) {
a1c04f71 1620 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
6d9246e7 1621 &$add_error('dport', $@) if $@;
48e3963e 1622 my $proto = $rule->{proto};
6d9246e7 1623 &$add_error('proto', "missing property - 'dport' requires this property")
48e3963e
WB		 1624 if !$proto;
1625 &$add_error('dport', "protocol '$proto' does not support ports")
1626 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1627 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
6d9246e7 1628 }
7ca36671
DM		 1629
1630 if ($rule->{sport}) {
a1c04f71 1631 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
6d9246e7 1632 &$add_error('sport', $@) if $@;
48e3963e 1633 my $proto = $rule->{proto};
6d9246e7 1634 &$add_error('proto', "missing property - 'sport' requires this property")
48e3963e
WB		 1635 if !$proto;
1636 &$add_error('sport', "protocol '$proto' does not support ports")
1637 if !$PROTOCOLS_WITH_PORTS->{$proto};
7ca36671
DM		 1638 }
1639
1640 if ($rule->{source}) {
041b9277
DM		 1641 eval {
1642 my $source_ipversion = parse_address_list($rule->{source});
1643 &$set_ip_version($source_ipversion);
1644 };
6d9246e7 1645 &$add_error('source', $@) if $@;
ae029a88 1646 &$check_ipset_or_alias_property('source', $ipversion);
7ca36671
DM		 1647 }
1648
1649 if ($rule->{dest}) {
9e2205e5
DM		 1650 eval {
1651 my $dest_ipversion = parse_address_list($rule->{dest});
041b9277 1652 &$set_ip_version($dest_ipversion);
9e2205e5 1653 };
6d9246e7 1654 &$add_error('dest', $@) if $@;
ae029a88 1655 &$check_ipset_or_alias_property('dest', $ipversion);
7ca36671
DM		 1656 }
1657
35d1d6da
DM		 1658 $rule->{ipversion} = $ipversion if $ipversion;
1659
a523e057 1660 if ($rule->{macro} && !$error_count) {
35d1d6da 1661 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
6d9246e7
DM		 1662 if (my $err = $@) {
1663 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1664 my $eh = $err->{errors};
1665 foreach my $p (keys %$eh) {
1666 &$add_error($p, $eh->{$p});
1667 }
1668 } else {
1669 &$add_error('macro', "$err");
1670 }
1671 }
9a2745a0
DM		 1672 }
1673
6d9246e7
DM		 1674 $rule->{errors} = $errors if $error_count;
1675
7ca36671
DM		 1676 return $rule;
1677}
1678
9c7e0858
DM		 1679sub copy_rule_data {
1680 my ($rule, $param) = @_;
1681
1682 foreach my $k (keys %$rule_properties) {
1683 if (defined(my $v = $param->{$k})) {
1684 if ($v eq '' || $v eq '-') {
1685 delete $rule->{$k};
1686 } else {
1687 $rule->{$k} = $v;
1688 }
9c7e0858
DM		 1689 }
1690 }
7ca36671 1691
9c7e0858
DM		 1692 return $rule;
1693}
1694
9f6845cf
DM		 1695sub rules_modify_permissions {
1696 my ($rule_env) = @_;
1697
1698 if ($rule_env eq 'host') {
1699 return {
1700 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1701 };
1702 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1703 return {
1704 check => ['perm', '/', [ 'Sys.Modify' ]],
1705 };
3b4882dc 1706 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1707 return {
1708 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1709 }
1710 }
1711
1712 return undef;
1713}
1714
1715sub rules_audit_permissions {
1716 my ($rule_env) = @_;
1717
1718 if ($rule_env eq 'host') {
1719 return {
1720 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1721 };
1722 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1723 return {
1724 check => ['perm', '/', [ 'Sys.Audit' ]],
1725 };
3b4882dc 1726 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1727 return {
1728 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1729 }
1730 }
1731
1732 return undef;
1733}
1734
9c7e0858 1735# core functions
780bcc0f
DM		 1736my $bridge_firewall_enabled = 0;
1737
1738sub enable_bridge_firewall {
1739
1740 return if $bridge_firewall_enabled; # only once
1741
5f0a912c
DM		 1742 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1743 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1744
6a8a75db
DM		 1745 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1746 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1747
780bcc0f
DM		 1748 $bridge_firewall_enabled = 1;
1749}
1750
b16e818e
DM		 1751sub iptables_restore_cmdlist {
1752 my ($cmdlist) = @_;
3a616aa0 1753
c1031ab1 1754 run_command(['iptables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
3a616aa0
AD		 1755}
1756
17da5c0f
AD		 1757sub ip6tables_restore_cmdlist {
1758 my ($cmdlist) = @_;
1759
c1031ab1 1760 run_command(['ip6tables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
17da5c0f
AD		 1761}
1762
34cdedfa
AD		 1763sub ipset_restore_cmdlist {
1764 my ($cmdlist) = @_;
1765
bb6ebf3b 1766 run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
34cdedfa
AD		 1767}
1768
151c209e
AD		 1769sub ebtables_restore_cmdlist {
1770 my ($cmdlist) = @_;
1771
c1031ab1 1772 run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
151c209e
AD		 1773}
1774
de2a57cd 1775sub iptables_get_chains {
17da5c0f
AD		 1776 my ($iptablescmd) = @_;
1777
1778 $iptablescmd = "iptables" if !$iptablescmd;
de2a57cd
DM		 1779
1780 my $res = {};
1781
1782 # check what chains we want to track
1783 my $is_pvefw_chain = sub {
1784 my $name = shift;
1785
dec84fcd
DM		 1786 return 1 if $name =~ m/^PVEFW-\S+$/;
1787
a3ded5cd 1788 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
954f24b1 1789
a3ded5cd 1790 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
954f24b1 1791
a3ded5cd 1792 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
a89dfcc6 1793 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
de2a57cd
DM		 1794
1795 return undef;
1796 };
1797
1798 my $table = '';
1799
c4a2e5ae
DM		 1800 my $hooks = {};
1801
de2a57cd
DM		 1802 my $parser = sub {
1803 my $line = shift;
1804
1805 return if $line =~ m/^#/;
1806 return if $line =~ m/^\s*$/;
1807
1808 if ($line =~ m/^\*(\S+)$/) {
1809 $table = $1;
1810 return;
1811 }
1812
1813 return if $table ne 'filter';
1814
1815 if ($line =~ m/^:(\S+)\s/) {
1816 my $chain = $1;
1817 return if !&$is_pvefw_chain($chain);
3fa83edf 1818 $res->{$chain} = "unknown";
09d5f68e 1819 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1820 my ($chain, $sig) = ($1, $2);
de2a57cd 1821 return if !&$is_pvefw_chain($chain);
3fa83edf 1822 $res->{$chain} = $sig;
c4a2e5ae
DM		 1823 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1824 $hooks->{$1} = 1;
de2a57cd
DM		 1825 } else {
1826 # simply ignore the rest
1827 return;
1828 }
1829 };
1830
c1031ab1 1831 run_command(["$iptablescmd-save"], outfunc => $parser);
de2a57cd 1832
c4a2e5ae 1833 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 1834}
1835
9bf7d929
DM		 1836sub iptables_chain_digest {
1837 my ($rules) = @_;
1838 my $digest = Digest::SHA->new('sha1');
1839 foreach my $rule (@$rules) { # order is important
1840 $digest->add($rule);
1841 }
1842 return $digest->b64digest;
1843}
1844
3f95d14a
DM		 1845sub ipset_chain_digest {
1846 my ($rules) = @_;
4bd0a9c4 1847
3f95d14a
DM		 1848 my $digest = Digest::SHA->new('sha1');
1849 foreach my $rule (sort @$rules) { # note: sorted
1850 $digest->add($rule);
1851 }
1852 return $digest->b64digest;
1853}
1854
34cdedfa
AD		 1855sub ipset_get_chains {
1856
1857 my $res = {};
1858 my $chains = {};
1859
1860 my $parser = sub {
1861 my $line = shift;
1862
1863 return if $line =~ m/^#/;
1864 return if $line =~ m/^\s*$/;
4b96e877 1865 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
DM		 1866 my $chain = $1;
1867 $line =~ s/\s+$//; # delete trailing white space
1868 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 1869 } else {
1870 # simply ignore the rest
1871 return;
1872 }
1873 };
1874
c1031ab1 1875 run_command(['ipset', 'save'], outfunc => $parser);
34cdedfa 1876
3f95d14a
DM		 1877 # compute digest for each chain
1878 foreach my $chain (keys %$chains) {
1879 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 1880 }
1881
1882 return $res;
1883}
1884
151c209e
AD		 1885sub ebtables_get_chains {
1886
1887 my $res = {};
1888 my $chains = {};
151c209e
AD		 1889 my $parser = sub {
1890 my $line = shift;
1891 return if $line =~ m/^#/;
1892 return if $line =~ m/^\s*$/;
fc1f1de9
WB		 1893 if ($line =~ m/^:(\S+)\s\S+$/) {
1894 # Make sure we know chains exist even if they're empty.
1895 $chains->{$1} //= [];
84025e99 1896 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
151c209e
AD		 1897 my $chain = $1;
1898 $line =~ s/\s+$//;
1899 push @{$chains->{$chain}}, $line;
1900 } else {
1901 # simply ignore the rest
1902 return;
1903 }
1904 };
1905
c1031ab1 1906 run_command(['ebtables-save'], outfunc => $parser);
84025e99 1907 # compute digest for each chain and store rules as well
151c209e 1908 foreach my $chain (keys %$chains) {
84025e99
SI		 1909 $res->{$chain}->{rules} = $chains->{$chain};
1910 $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
151c209e
AD		 1911 }
1912 return $res;
1913}
1914
180da76c
TW		 1915# substitude action of rule according to action hash
1916sub rule_substitude_action {
1917 my ($rule, $actions) = @_;
1918
1919 if (my $action = $rule->{action}) {
1920 $rule->{action} = $actions->{$action} if defined($actions->{$action});
1921 }
1922}
1923
a44cb745
TW		 1924# generate a src or dst match
1925# $dir(ection) is either d or s
1926sub ipt_gen_src_or_dst_match {
1927 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1928
1929 my $srcdst;
1930 if ($dir eq 's') {
1931 $srcdst = "src";
1932 } elsif ($dir eq 'd') {
1933 $srcdst = "dst";
1934 } else {
1935 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1936 }
1937
1938 my $match;
1939 if ($adr =~ m/^\+/) {
1940 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1941 my $name = $1;
1942 my $ipset_chain;
1943 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1944 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1945 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1946 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1947 } else {
1948 die "no such ipset '$name'\n";
1949 }
1950 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1951 } else {
1952 die "invalid security group name '$adr'\n";
1953 }
1954 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1955 my $alias = lc($adr);
1956 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1957 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1958 die "no such alias '$adr'\n" if !$e;
1959 $match = "-${dir} $e->{cidr}";
1960 } elsif ($adr =~ m/\-/){
1961 $match = "-m iprange --${srcdst}-range $adr";
1962 } else {
1963 $match = "-${dir} $adr";
1964 }
1965
1966 return $match;
1967}
1968
30c390f9
TW		 1969# convert a %rule to an array of iptables commands
1970sub ipt_rule_to_cmds {
1971 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1972
1973 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1974
1975 my @match = ();
1976
1977 if (defined $rule->{match}) {
1978 push @match, $rule->{match};
1979 } else {
1980 push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1981 push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1982
1983 if ($rule->{source}) {
1984 push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1985 }
1986 if ($rule->{dest}) {
1987 push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1988 }
1989
1990 if (my $proto = $rule->{proto}) {
1991 push @match, "-p $proto";
1992
f776d6de
WB		 1993 my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1994 my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
30c390f9 1995
f776d6de
WB		 1996 my $add_dport = sub {
1997 return if !$rule->{dport};
3dffed4c 1998
30c390f9
TW		 1999 if ($proto eq 'icmp') {
2000 # Note: we use dport to store --icmp-type
2001 die "unknown icmp-type '$rule->{dport}'\n"
2002 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2003 push @match, "-m icmp --icmp-type $rule->{dport}";
2004 } elsif ($proto eq 'icmpv6') {
2005 # Note: we use dport to store --icmpv6-type
2006 die "unknown icmpv6-type '$rule->{dport}'\n"
2007 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2008 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2009 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2010 die "protocol $proto does not have ports\n";
f776d6de
WB		 2011 } elsif ($multidport) {
2012 push @match, "--match multiport", "--dports $rule->{dport}";
30c390f9 2013 } else {
f776d6de 2014 push @match, "--dport $rule->{dport}";
30c390f9 2015 }
f776d6de 2016 };
30c390f9 2017
f776d6de
WB		 2018 my $add_sport = sub {
2019 return if !$rule->{sport};
3dffed4c 2020
30c390f9
TW		 2021 die "protocol $proto does not have ports\n"
2022 if !$PROTOCOLS_WITH_PORTS->{$proto};
f776d6de
WB		 2023 if ($multisport) {
2024 push @match, "--match multiport", "--sports $rule->{sport}";
30c390f9
TW		 2025 } else {
2026 push @match, "--sport $rule->{sport}";
2027 }
f776d6de
WB		 2028 };
2029
3dffed4c 2030 # order matters - single port before multiport!
f776d6de
WB		 2031 $add_dport->() if $multisport;
2032 $add_sport->();
2033 $add_dport->() if !$multisport;
30c390f9
TW		 2034 } elsif ($rule->{dport} || $rule->{sport}) {
2035 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2036 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2037 }
2038
2039 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2040 }
2041 my $matchstr = scalar(@match) ? join(' ', @match) : "";
2042
2043 my $targetstr;
2044 if (defined $rule->{target}) {
2045 $targetstr = $rule->{target};
2046 } else {
2047 my $action = (defined $rule->{action}) ? $rule->{action} : "";
2048 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2049 $targetstr = ($goto) ? "-g $action" : "-j $action";
2050 }
2051
2052 my @iptcmds;
2db2b6aa
TL		 2053 my $log = $rule->{log};
2054 if (defined($log) && $log ne 'nolog') {
3489f8a2
CE		 2055 my $loglevel = $log_level_hash->{$log};
2056 my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
30c390f9
TW		 2057 push @iptcmds, "-A $chain $matchstr $logaction";
2058 }
2059 push @iptcmds, "-A $chain $matchstr $targetstr";
2060 return @iptcmds;
2061}
2062
eba0fb64 2063sub ruleset_generate_rule {
3489f8a2 2064 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
eba0fb64 2065
e5076eee
DM		 2066 my $rules;
2067
2068 if ($rule->{macro}) {
35d1d6da 2069 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
e5076eee
DM		 2070 } else {
2071 $rules = [ $rule ];
2072 }
2073
30c390f9
TW		 2074 # update all or nothing
2075 my @ipt_rule_cmds;
2076 foreach my $r (@$rules) {
3489f8a2 2077 push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
30c390f9
TW		 2078 }
2079 foreach my $c (@ipt_rule_cmds) {
2080 ruleset_add_ipt_cmd($ruleset, $chain, $c);
2081 }
2082}
2083
3fa83edf
DM		 2084sub ruleset_create_chain {
2085 my ($ruleset, $chain) = @_;
3a616aa0 2086
d050c724 2087 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 2088 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 2089
3fa83edf
DM		 2090 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2091
2092 $ruleset->{$chain} = [];
3a616aa0
AD		 2093}
2094
3fa83edf
DM		 2095sub ruleset_chain_exist {
2096 my ($ruleset, $chain) = @_;
3a616aa0 2097
3fa83edf
DM		 2098 return $ruleset->{$chain} ? 1 : undef;
2099}
3a616aa0 2100
30c390f9
TW		 2101# add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2102sub ruleset_add_ipt_cmd {
2103 my ($ruleset, $chain, $iptcmd) = @_;
2104
2105 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2106
2107 push @{$ruleset->{$chain}}, $iptcmd;
2108}
2109
1e9c5070 2110sub ruleset_addrule {
3489f8a2 2111 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
1e9c5070 2112
3489f8a2 2113 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1e9c5070 2114
3489f8a2
CE		 2115 if ($log) {
2116 my $loglevel = $log_level_hash->{$log};
2117 my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
7f7930f8 2118 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
3489f8a2
CE		 2119 }
2120 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2121 $match .= ' ' if length($match);
2122 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
1e9c5070
TW		 2123}
2124
3fa83edf 2125sub ruleset_insertrule {
1e9c5070 2126 my ($ruleset, $chain, $match, $action, $log) = @_;
3a616aa0 2127
3fa83edf 2128 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 2129
1e9c5070 2130 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
3fa83edf 2131}
3a616aa0 2132
782c4cde
DM		 2133sub get_log_rule_base {
2134 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 2135
782c4cde 2136 $vmid = 0 if !defined($vmid);
7f7930f8 2137 $msg = "" if !defined($msg);
782c4cde 2138
cc37e000
TL		 2139 my $rlimit = '';
2140 if (defined($global_log_ratelimit)) {
2141 $rlimit = "-m limit $global_log_ratelimit ";
2142 }
2143
cbb5d6f3 2144 # Note: we use special format for prefix to pass further
7f7930f8 2145 # info to log daemon (VMID, LOGLEVEL and CHAIN)
cc37e000 2146 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
782c4cde
DM		 2147}
2148
ead850e8 2149sub ruleset_add_chain_policy {
88c26d5e 2150 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 2151
2152 if ($policy eq 'ACCEPT') {
2153
180da76c
TW		 2154 my $rule = { action => 'ACCEPT' };
2155 rule_substitude_action($rule, { ACCEPT => $accept_action});
2156 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
ead850e8
DM		 2157
2158 } elsif ($policy eq 'DROP') {
2159
1e9c5070 2160 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
ead850e8 2161
7f7930f8 2162 ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
ead850e8 2163 } elsif ($policy eq 'REJECT') {
1e9c5070 2164 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
ead850e8 2165
d8d4dd67 2166 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
ead850e8
DM		 2167 } else {
2168 # should not happen
2169 die "internal error: unknown policy '$policy'";
2170 }
2171}
2172
a83abe93 2173sub ruleset_chain_add_ndp {
e8415920 2174 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
a83abe93
WB		 2175 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2176
1e9c5070 2177 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
d7aa51ac 2178 if ($direction ne 'OUT' || $options->{radv}) {
1e9c5070 2179 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
d7aa51ac 2180 }
1e9c5070
TW		 2181 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2182 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
a83abe93
WB		 2183}
2184
e2943485 2185sub ruleset_chain_add_conn_filters {
27c49e25 2186 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
e2943485 2187
27c49e25
CE		 2188 if (!$allow_invalid) {
2189 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2190 }
1e9c5070 2191 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
e2943485
DM		 2192}
2193
2194sub ruleset_chain_add_input_filters {
88c26d5e 2195 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2428e394
AD		 2196
2197 if ($cluster_conf->{ipset}->{blacklist}){
b5831a0d
AD		 2198 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2199 ruleset_create_chain($ruleset, "PVEFW-blacklist");
3489f8a2 2200 ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
b5831a0d 2201 }
88c26d5e 2202 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1e9c5070 2203 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2428e394 2204 }
e2943485
DM		 2205
2206 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
5b5c42b1 2207 if ($ipversion == 4) {
1e9c5070 2208 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
5b5c42b1 2209 }
e2943485
DM		 2210 }
2211
2212 if ($options->{tcpflags}) {
1e9c5070 2213 ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
e2943485
DM		 2214 }
2215}
2216
9e15114a 2217sub ruleset_create_vm_chain {
88c26d5e 2218 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
3a616aa0 2219
9e15114a 2220 ruleset_create_chain($ruleset, $chain);
b47ecc88 2221 my $accept = generate_nfqueue($options);
3a616aa0 2222
ce15d90b 2223 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
dcafc5fb
WB		 2224 if ($ipversion == 4) {
2225 if ($direction eq 'OUT') {
2226 ruleset_generate_rule($ruleset, $chain, $ipversion,
2227 { action => 'PVEFW-SET-ACCEPT-MARK',
2228 proto => 'udp', sport => 68, dport => 67 });
2229 } else {
2230 ruleset_generate_rule($ruleset, $chain, $ipversion,
2231 { action => 'ACCEPT',
2232 proto => 'udp', sport => 67, dport => 68 });
2233 }
2234 } elsif ($ipversion == 6) {
2235 if ($direction eq 'OUT') {
2236 ruleset_generate_rule($ruleset, $chain, $ipversion,
2237 { action => 'PVEFW-SET-ACCEPT-MARK',
2238 proto => 'udp', sport => 546, dport => 547 });
2239 } else {
2240 ruleset_generate_rule($ruleset, $chain, $ipversion,
2241 { action => 'ACCEPT',
2242 proto => 'udp', sport => 547, dport => 546 });
2243 }
76a2d1e7 2244 }
dcafc5fb 2245
ce15d90b
DM		 2246 }
2247
b21aca2c
DM		 2248 if ($direction eq 'OUT') {
2249 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1e9c5070 2250 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
b21aca2c 2251 }
d7aa51ac 2252 if ($ipversion == 6 && !$options->{radv}) {
1e9c5070 2253 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
d7aa51ac 2254 }
808d711d 2255 if ($ipfilter_ipset) {
1e9c5070 2256 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
808d711d 2257 }
1e9c5070 2258 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
c29f55c9 2259 }
e8415920
WB		 2260
2261 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2262 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
9e15114a
DM		 2263}
2264
4bc6b5ac 2265sub ruleset_add_group_rule {
aedde2c2 2266 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
4bc6b5ac
DM		 2267
2268 my $group = $rule->{action};
2269 my $group_chain = "GROUP-$group-$direction";
2270 if(!ruleset_chain_exist($ruleset, $group_chain)){
aedde2c2 2271 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
4bc6b5ac 2272 }
bfc488f6 2273
f8b12fff 2274 if ($direction eq 'OUT' && $rule->{iface_out}) {
1e9c5070 2275 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
f8b12fff 2276 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1e9c5070 2277 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
4bc6b5ac 2278 } else {
1e9c5070 2279 ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
4bc6b5ac
DM		 2280 }
2281
1e9c5070 2282 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
4bc6b5ac
DM		 2283}
2284
9e15114a 2285sub ruleset_generate_vm_rules {
3489f8a2 2286 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
9e15114a
DM		 2287
2288 my $lc_direction = lc($direction);
c29f55c9 2289
6b8ca015
DM		 2290 my $in_accept = generate_nfqueue($options);
2291
92e976b3
DM		 2292 foreach my $rule (@$rules) {
2293 next if $rule->{iface} && $rule->{iface} ne $netid;
b7ab6989 2294 next if !$rule->{enable} || $rule->{errors};
006490cb 2295 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
84870b1a 2296
92e976b3 2297 if ($rule->{type} eq 'group') {
4bc6b5ac 2298 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
aedde2c2 2299 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
92e976b3
DM		 2300 } else {
2301 next if $rule->{type} ne $lc_direction;
921dfb33 2302 eval {
3489f8a2 2303 $rule->{logmsg} = "$rule->{action}: ";
921dfb33 2304 if ($direction eq 'OUT') {
180da76c 2305 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
3489f8a2 2306 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
921dfb33 2307 } else {
180da76c 2308 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
3489f8a2 2309 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
921dfb33
DM		 2310 }
2311 };
2312 warn $@ if $@;
4e6112f9 2313 }
3a616aa0 2314 }
9e15114a
DM		 2315}
2316
b47ecc88
AD		 2317sub generate_nfqueue {
2318 my ($options) = @_;
2319
73089769
DM		 2320 if ($options->{ips}) {
2321 my $action = "NFQUEUE";
2322 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2323 if (defined($3) && defined($1)) {
b47ecc88 2324 $action .= " --queue-balance $1:$3";
73089769 2325 } elsif (defined($1)) {
b47ecc88
AD		 2326 $action .= " --queue-num $1";
2327 }
2328 }
8dc92812 2329 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
73089769
DM		 2330 return $action;
2331 } else {
2332 return "ACCEPT";
b47ecc88 2333 }
b47ecc88
AD		 2334}
2335
da6fc60b 2336sub ruleset_generate_vm_ipsrules {
a01c32c7 2337 my ($ruleset, $options, $direction, $iface) = @_;
da6fc60b
AD		 2338
2339 if ($options->{ips} && $direction eq 'IN') {
2340 my $nfqueue = generate_nfqueue($options);
2341
a01c32c7 2342 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
da6fc60b
AD		 2343 ruleset_create_chain($ruleset, "PVEFW-IPS");
2344 }
2345
1e9c5070 2346 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
da6fc60b
AD		 2347 }
2348}
2349
9e15114a 2350sub generate_tap_rules_direction {
84870b1a 2351 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
9e15114a
DM		 2352
2353 my $lc_direction = lc($direction);
2354
2355 my $rules = $vmfw_conf->{rules};
2356
2357 my $options = $vmfw_conf->{options};
2358 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2359
2360 my $tapchain = "$iface-$direction";
2361
b692f42c 2362 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
88c26d5e 2363 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
74601077 2364 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
808d711d 2365
a34cfdd0 2366 if ($options->{enable}) {
033a15b3
ML		 2367 # create chain with mac and ip filter
2368 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2369
3489f8a2 2370 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
3a616aa0 2371
a34cfdd0 2372 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
da6fc60b 2373
a34cfdd0
DM		 2374 # implement policy
2375 my $policy;
ccae0b50 2376
a34cfdd0
DM		 2377 if ($direction eq 'OUT') {
2378 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2379 } else {
76448f08 2380 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
a34cfdd0 2381 }
ccae0b50 2382
a34cfdd0
DM		 2383 my $accept = generate_nfqueue($options);
2384 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
88c26d5e 2385 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
a34cfdd0
DM		 2386 } else {
2387 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
88c26d5e 2388 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
a34cfdd0 2389 }
3a616aa0 2390
3fa83edf 2391 # plug the tap chain to bridge chain
3cc81077 2392 if ($direction eq 'IN') {
a01c32c7 2393 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
8f3aa9cc 2394 "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
3cc81077 2395 } else {
a01c32c7 2396 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
8f3aa9cc 2397 "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
3cc81077 2398 }
3a616aa0
AD		 2399}
2400
d18c1e2b 2401sub enable_host_firewall {
06208a01 2402 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
0bd5f137 2403
92e976b3 2404 my $options = $hostfw_conf->{options};
63324b09 2405 my $cluster_options = $cluster_conf->{options};
92e976b3 2406 my $rules = $hostfw_conf->{rules};
35f0c37e 2407 my $cluster_rules = $cluster_conf->{rules};
178a63be 2408
06208a01
SR		 2409 # corosync preparation
2410 my $corosync_rule = "-p udp --dport 5404:5405";
2411 my $corosync_local_addresses = {};
eacd4748 2412 my $multicast_enabled;
06208a01
SR		 2413 my $local_hostname = PVE::INotify::nodename();
2414 if (defined($corosync_conf)) {
2415 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2416 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2417
2418 if ($node_name eq $local_hostname) {
2419 $corosync_local_addresses->{$key} = $node_ip;
2420 }
2421 });
eacd4748
SR		 2422
2423 # allow multicast only if enabled in config
81a0a9ff
FG		 2424 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2425 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
06208a01
SR		 2426 }
2427
3fa83edf 2428 # host inbound firewall
dec84fcd
DM		 2429 my $chain = "PVEFW-HOST-IN";
2430 ruleset_create_chain($ruleset, $chain);
0bd5f137 2431
178a63be
DM		 2432 my $loglevel = get_option_log_level($options, "log_level_in");
2433
1e9c5070 2434 ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
4ac863a6 2435
27c49e25 2436 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e8415920 2437 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
88c26d5e 2438 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
fb424a00 2439
23e888f8
DM		 2440 # we use RETURN because we need to check also tap rules
2441 my $accept_action = 'RETURN';
2442
1e9c5070 2443 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2444
35f0c37e
DM		 2445 # add host rules first, so that cluster wide rules can be overwritten
2446 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2447 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2448 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
bfc488f6 2449
f8b12fff 2450 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
5383df39 2451
1a9978ed
DM		 2452 eval {
2453 if ($rule->{type} eq 'group') {
aedde2c2 2454 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
1a9978ed 2455 } elsif ($rule->{type} eq 'in') {
180da76c 2456 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2457 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2458 }
2459 };
2460 warn $@ if $@;
f8b12fff 2461 delete $rule->{iface_in};
0bd5f137 2462 }
eb399cef
DM		 2463
2464 # allow standard traffic for management ipset (includes cluster network)
88c26d5e 2465 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
708ba714 2466 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1e9c5070
TW		 2467 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
2468 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2469 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2470 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
bfc488f6 2471
06208a01
SR		 2472 # corosync inbound rules
2473 if (defined($corosync_conf)) {
eacd4748
SR		 2474 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2475 if $multicast_enabled;
3bc79f87 2476
06208a01
SR		 2477 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2478 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
a9c463ce 2479 my $destination = $corosync_local_addresses->{$key};
06208a01 2480
a9c463ce 2481 if ($node_name ne $local_hostname && defined($destination)) {
06208a01 2482 # accept only traffic on same ring
a9c463ce 2483 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
06208a01
SR		 2484 }
2485 });
3bc79f87 2486 }
0bd5f137 2487
23e888f8 2488 # implement input policy
63324b09 2489 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
88c26d5e 2490 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
0bd5f137 2491
3fa83edf 2492 # host outbound firewall
aadd745e 2493 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 2494 ruleset_create_chain($ruleset, $chain);
2495
178a63be
DM		 2496 $loglevel = get_option_log_level($options, "log_level_out");
2497
1e9c5070 2498 ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
e2943485 2499
27c49e25 2500 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e2943485 2501
23e888f8
DM		 2502 # we use RETURN because we may want to check other thigs later
2503 $accept_action = 'RETURN';
e8415920 2504 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
23e888f8 2505
1e9c5070 2506 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2507
35f0c37e
DM		 2508 # add host rules first, so that cluster wide rules can be overwritten
2509 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2510 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2511 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
5383df39 2512
f8b12fff 2513 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1a9978ed 2514 eval {
3489f8a2 2515 $rule->{logmsg} = "$rule->{action}: ";
1a9978ed 2516 if ($rule->{type} eq 'group') {
aedde2c2 2517 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
1a9978ed 2518 } elsif ($rule->{type} eq 'out') {
180da76c 2519 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2520 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2521 }
2522 };
2523 warn $@ if $@;
f8b12fff 2524 delete $rule->{iface_out};
0bd5f137
AD		 2525 }
2526
3bc79f87 2527 # allow standard traffic on cluster network
06208a01
SR		 2528 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2529 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2530
35d1d6da 2531 if ($localnet && ($ipversion == $localnet_ver)) {
1e9c5070
TW		 2532 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
2533 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
2534 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2535 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
06208a01 2536 }
bfc488f6 2537
06208a01
SR		 2538 # corosync outbound rules
2539 if (defined($corosync_conf)) {
eacd4748
SR		 2540 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2541 if $multicast_enabled;
06208a01
SR		 2542
2543 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2544 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
a9c463ce 2545 my $source = $corosync_local_addresses->{$key};
06208a01 2546
a9c463ce 2547 if ($node_name ne $local_hostname && defined($source)) {
06208a01 2548 # accept only traffic on same ring
a9c463ce 2549 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
06208a01
SR		 2550 }
2551 });
3bc79f87
DM		 2552 }
2553
23e888f8 2554 # implement output policy
63324b09 2555 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
88c26d5e 2556 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
6158271d 2557
1e9c5070
TW		 2558 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2559 ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
9d31b418
AD		 2560}
2561
2562sub generate_group_rules {
aedde2c2 2563 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
9d31b418 2564
c6f5cc88 2565 my $rules = $cluster_conf->{groups}->{$group};
6158271d 2566
b4deedab
DM		 2567 if (!$rules) {
2568 warn "no such security group '$group'\n";
2569 $rules = []; # create empty chain
2570 }
2571
3fa83edf 2572 my $chain = "GROUP-${group}-IN";
9d31b418 2573
3fa83edf 2574 ruleset_create_chain($ruleset, $chain);
1e9c5070 2575 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2576
92e976b3
DM		 2577 foreach my $rule (@$rules) {
2578 next if $rule->{type} ne 'in';
7a5a402b 2579 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2580 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
180da76c 2581 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2dc0a26e 2582 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418
AD		 2583 }
2584
3fa83edf 2585 $chain = "GROUP-${group}-OUT";
9d31b418 2586
3fa83edf 2587 ruleset_create_chain($ruleset, $chain);
1e9c5070 2588 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2589
92e976b3
DM		 2590 foreach my $rule (@$rules) {
2591 next if $rule->{type} ne 'out';
7a5a402b 2592 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2593 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
92e976b3
DM		 2594 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2595 # check also other tap rules later
180da76c 2596 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2dc0a26e 2597 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418 2598 }
9d31b418
AD		 2599}
2600
51bae274
DM		 2601my $MAX_NETS = 32;
2602my $valid_netdev_names = {};
2603for (my $i = 0; $i < $MAX_NETS; $i++) {
2604 $valid_netdev_names->{"net$i"} = 1;
2605}
5e1267a5 2606
fe3d79b4
WB		 2607sub get_mark_values {
2608 my ($value, $mask) = @_;
2609 $value = hex($value) if $value =~ /^0x/;
2610 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2611 $mask = 0xffffffff if !defined($mask);
2612 return ($value, $mask);
2613}
2614
51bae274 2615sub parse_fw_rule {
40af93c4 2616 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
5e1267a5 2617
d4cda423
DM		 2618 my $orig_line = $line;
2619
6d9246e7
DM		 2620 my $rule = {};
2621
11bac5c2 2622 # we can add single line comments to the end of the rule
6d9246e7
DM		 2623 if ($line =~ s/#\s*(.*?)\s*$//) {
2624 $rule->{comment} = decode('utf8', $1);
2625 }
11bac5c2
DM		 2626
2627 # we can disable a rule when prefixed with '|'
ea9e5116 2628
6d9246e7 2629 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
51bae274 2630
dba740a9
DM		 2631 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2632 die "unable to parse rule: $line\n";
6d9246e7
DM		 2633
2634 $rule->{type} = lc($1);
2635 $rule->{action} = $2;
2636
2637 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2638 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2639 $rule->{macro} = $1;
2640 $rule->{action} = $2;
92e976b3 2641 }
51bae274
DM		 2642 }
2643
dba740a9
DM		 2644 while (length($line)) {
2645 if ($line =~ s/^-i (\S+)\s*//) {
6d9246e7 2646 $rule->{iface} = $1;
dba740a9
DM		 2647 next;
2648 }
51bae274 2649
6d9246e7 2650 last if $rule->{type} eq 'group';
51bae274 2651
dba740a9 2652 if ($line =~ s/^-p (\S+)\s*//) {
6d9246e7 2653 $rule->{proto} = $1;
dba740a9
DM		 2654 next;
2655 }
6d9246e7 2656
dba740a9 2657 if ($line =~ s/^-dport (\S+)\s*//) {
6d9246e7 2658 $rule->{dport} = $1;
dba740a9
DM		 2659 next;
2660 }
6d9246e7 2661
dba740a9 2662 if ($line =~ s/^-sport (\S+)\s*//) {
6d9246e7 2663 $rule->{sport} = $1;
dba740a9
DM		 2664 next;
2665 }
2666 if ($line =~ s/^-source (\S+)\s*//) {
6d9246e7 2667 $rule->{source} = $1;
dba740a9
DM		 2668 next;
2669 }
2670 if ($line =~ s/^-dest (\S+)\s*//) {
6d9246e7 2671 $rule->{dest} = $1;
dba740a9
DM		 2672 next;
2673 }
3489f8a2
CE		 2674 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2675 $rule->{log} = $1;
2676 next;
2677 }
51bae274 2678
dba740a9
DM		 2679 last;
2680 }
ba791b1f 2681
dba740a9 2682 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 2683
a523e057 2684 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
eedcb564
WB		 2685 if ($rule->{errors}) {
2686 # The verbose flag really means we're running from the CLI and want
2687 # output on the console - in the other case we really want such errors
2688 # to go into the syslog instead.
2689 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2690 $log->("$prefix - errors in rule parameters: $orig_line\n");
d4cda423 2691 foreach my $p (keys %{$rule->{errors}}) {
eedcb564 2692 $log->(" $p: $rule->{errors}->{$p}\n");
d4cda423
DM		 2693 }
2694 }
6d9246e7
DM		 2695
2696 return $rule;
51bae274
DM		 2697}
2698
c5e8b008
AD		 2699sub verify_ethertype {
2700 my ($value) = @_;
2701 my $types = get_etc_ethertypes();
2702 die "unknown ethernet protocol type: $value\n"
2703 if !defined($types->{byname}->{$value}) &&
2704 !defined($types->{byid}->{$value});
2705}
2706
2d404ffc 2707sub parse_vmfw_option {
85c6eaed
DM		 2708 my ($line) = @_;
2709
2710 my ($opt, $value);
2711
178a63be
DM		 2712 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2713
74601077 2714 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 2715 $opt = lc($1);
2716 $value = int($2);
178a63be
DM		 2717 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2718 $opt = lc($1);
2719 $value = $2 ? lc($3) : '';
72f63fde 2720 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 2721 $opt = lc($1);
2722 $value = uc($3);
b47ecc88
AD		 2723 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2724 $opt = lc($1);
2725 $value = $2;
c5e8b008
AD		 2726 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2727 $opt = lc($1);
2728 $value = $2;
2729 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
9c6b6efd 2730 } else {
85c6eaed
DM		 2731 die "can't parse option '$line'\n"
2732 }
2733
2734 return ($opt, $value);
2735}
2736
2d404ffc
DM		 2737sub parse_hostfw_option {
2738 my ($line) = @_;
2739
2740 my ($opt, $value);
2741
2742 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2743
27c49e25 2744 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2d404ffc
DM		 2745 $opt = lc($1);
2746 $value = int($2);
178a63be 2747 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 2748 $opt = lc($1);
2749 $value = $2 ? lc($3) : '';
28c082a1 2750 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 2751 $opt = lc($1);
2752 $value = int($2);
2d404ffc 2753 } else {
2d404ffc
DM		 2754 die "can't parse option '$line'\n"
2755 }
2756
2757 return ($opt, $value);
2758}
2759
c6f5cc88
DM		 2760sub parse_clusterfw_option {
2761 my ($line) = @_;
2762
2763 my ($opt, $value);
2764
72d055fc 2765 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
c6f5cc88
DM		 2766 $opt = lc($1);
2767 $value = int($2);
72d055fc
AG		 2768 if (($value > 1) && ((time() - $value) > 60)) {
2769 $value = 0
2770 }
2549e7ef 2771 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
84025e99
SI		 2772 $opt = lc($1);
2773 $value = int($2);
63324b09
DM		 2774 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2775 $opt = lc($1);
2776 $value = uc($3);
cc37e000
TL		 2777 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2778 $opt = lc($1);
2779 $value = $2;
c6f5cc88 2780 } else {
c6f5cc88
DM		 2781 die "can't parse option '$line'\n"
2782 }
2783
2784 return ($opt, $value);
2785}
2786
6c221576
DM		 2787sub resolve_alias {
2788 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2789
6d959e3f 2790 my $alias = lc($cidr);
04f5088f 2791 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
6d959e3f 2792 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
6c221576 2793
6d959e3f
DM		 2794 die "no such alias '$cidr'\n" if !$e;;
2795
2796 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
6c221576
DM		 2797}
2798
ae029a88
DM		 2799sub parse_ip_or_cidr {
2800 my ($cidr) = @_;
2801
2802 my $ipversion;
2803
2804 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2805 $cidr =~ s|/128$||;
2806 $ipversion = 6;
2807 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2808 $cidr =~ s|/32$||;
2809 $ipversion = 4;
2810 } else {
2811 die "value does not look like a valid IP address or CIDR network\n";
2812 }
2813
2814 return wantarray ? ($cidr, $ipversion) : $cidr;
2815}
2816
e76a9f53 2817sub parse_alias {
92e1209b
AD		 2818 my ($line) = @_;
2819
81d574a7
DM		 2820 # we can add single line comments to the end of the line
2821 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2822
92e1209b 2823 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7 2824 my ($name, $cidr) = ($1, $2);
ae029a88
DM		 2825 my $ipversion;
2826
2827 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2828
81d574a7
DM		 2829 my $data = {
2830 name => $name,
2831 cidr => $cidr,
70e524eb 2832 ipversion => $ipversion,
81d574a7
DM		 2833 };
2834 $data->{comment} = $comment if $comment;
2835 return $data;
92e1209b
AD		 2836 }
2837
81d574a7 2838 return undef;
92e1209b
AD		 2839}
2840
e5cd1ee0 2841sub generic_fw_config_parser {
585ede43
TL		 2842 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2843
51bae274
DM		 2844 my $section;
2845 my $group;
2846
1210ae94 2847 my $res = $empty_conf;
6158271d 2848
0dbef530
TL		 2849 my $raw;
2850 if ($filename =~ m!^/etc/pve/(.*)$!) {
2851 $raw = PVE::Cluster::get_config($1);
2852 } else {
2853 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2854 }
2855 return {} if !$raw;
2856
2857 my $linenr = 0;
2858 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2859 my $line = $1;
2860 $linenr++;
51bae274
DM		 2861 next if $line =~ m/^#/;
2862 next if $line =~ m/^\s*$/;
c8c534f7
DM		 2863 chomp $line;
2864
961b4928
DM		 2865 my $prefix = "$filename (line $linenr)";
2866
1210ae94 2867 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
c6f5cc88
DM		 2868 $section = 'options';
2869 next;
2870 }
2871
1210ae94 2872 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
92e1209b
AD		 2873 $section = 'aliases';
2874 next;
2875 }
2876
1210ae94 2877 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
c6f5cc88 2878 $section = 'groups';
92e976b3 2879 $group = lc($1);
0d22acb3 2880 my $comment = $2;
351052d1
DM		 2881 eval {
2882 die "security group name too long\n" if length($group) > $max_group_name_length;
2883 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2884 };
2885 if (my $err = $@) {
2886 ($section, $group, $comment) = undef;
2887 warn "$prefix: $err";
2888 next;
2889 }
2890
c85c87f9 2891 $res->{$section}->{$group} = [];
649e4d57
DM		 2892 $res->{group_comments}->{$group} = decode('utf8', $comment)
2893 if $comment;
51bae274
DM		 2894 next;
2895 }
34cdedfa 2896
1210ae94 2897 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
c6f5cc88
DM		 2898 $section = 'rules';
2899 next;
2900 }
cbb5d6f3 2901
1210ae94 2902 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
34cdedfa
AD		 2903 $section = 'ipset';
2904 $group = lc($1);
d72c631c 2905 my $comment = $2;
351052d1
DM		 2906 eval {
2907 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2908 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2909 };
2910 if (my $err = $@) {
2911 ($section, $group, $comment) = undef;
2912 warn "$prefix: $err";
2913 next;
2914 }
2915
c85c87f9 2916 $res->{$section}->{$group} = [];
e34d0e58 2917 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2918 if $comment;
34cdedfa
AD		 2919 next;
2920 }
2921
c6f5cc88 2922 if (!$section) {
cbb5d6f3 2923 warn "$prefix: skip line - no section\n";
51bae274
DM		 2924 next;
2925 }
2926
c6f5cc88
DM		 2927 if ($section eq 'options') {
2928 eval {
1210ae94
DM		 2929 my ($opt, $value);
2930 if ($rule_env eq 'cluster') {
2931 ($opt, $value) = parse_clusterfw_option($line);
2932 } elsif ($rule_env eq 'host') {
2933 ($opt, $value) = parse_hostfw_option($line);
2934 } else {
2935 ($opt, $value) = parse_vmfw_option($line);
2936 }
c6f5cc88
DM		 2937 $res->{options}->{$opt} = $value;
2938 };
2939 warn "$prefix: $@" if $@;
92e1209b
AD		 2940 } elsif ($section eq 'aliases') {
2941 eval {
e76a9f53 2942 my $data = parse_alias($line);
81d574a7 2943 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2944 };
2945 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2946 } elsif ($section eq 'rules') {
2947 my $rule;
40af93c4 2948 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
c6f5cc88
DM		 2949 if (my $err = $@) {
2950 warn "$prefix: $err";
2951 next;
2952 }
2953 push @{$res->{$section}}, $rule;
2954 } elsif ($section eq 'groups') {
34cdedfa 2955 my $rule;
40af93c4 2956 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
34cdedfa
AD		 2957 if (my $err = $@) {
2958 warn "$prefix: $err";
2959 next;
2960 }
3f95d14a 2961 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2962 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2963 # we can add single line comments to the end of the rule
2964 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2965
30f1b100 2966 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2967 my $nomatch = $1;
9d6f90e6 2968 my $cidr = $2;
d46b1ef6
DM		 2969 my $errors;
2970
2971 if ($nomatch && !$feature_ipset_nomatch) {
2972 $errors->{nomatch} = "nomatch not supported by kernel";
2973 }
2a052ee3 2974
4803b296
DM		 2975 eval {
2976 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2977 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2978 } else {
ae029a88 2979 $cidr = parse_ip_or_cidr($cidr);
92e1209b 2980 }
4803b296
DM		 2981 };
2982 if (my $err = $@) {
c8c534f7 2983 chomp $err;
d46b1ef6 2984 $errors->{cidr} = $err;
2a052ee3 2985 }
2a052ee3 2986
b14db52f
WB		 2987 if ($cidr =~ m!/0+$!) {
2988 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2989 }
2990
e34d0e58 2991 my $entry = { cidr => $cidr };
9d6f90e6
DM		 2992 $entry->{nomatch} = 1 if $nomatch;
2993 $entry->{comment} = $comment if $comment;
d46b1ef6 2994 $entry->{errors} = $errors if $errors;
e34d0e58 2995
c8c534f7 2996 if ($verbose && $errors) {
9a3061c7 2997 warn "$prefix - errors in ipset '$group': $line\n";
c8c534f7
DM		 2998 foreach my $p (keys %{$errors}) {
2999 warn " $p: $errors->{$p}\n";
3000 }
3001 }
3002
9d6f90e6 3003 push @{$res->{$section}->{$group}}, $entry;
1210ae94
DM		 3004 } else {
3005 warn "$prefix: skip line - unknown section\n";
3006 next;
51bae274 3007 }
5e1267a5
DM		 3008 }
3009
3010 return $res;
3011}
3012
06320eb0
DM		 3013sub run_locked {
3014 my ($code, @param) = @_;
3015
3016 my $timeout = 10;
3017
3018 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3019
3020 die $@ if $@;
3021
3022 return $res;
3023}
3024
5e1267a5
DM		 3025sub read_local_vm_config {
3026
5e1267a5 3027 my $qemu = {};
3b4882dc 3028 my $lxc = {};
5e1267a5 3029
fdefeeab 3030 my $vmdata = { qemu => $qemu, lxc => $lxc };
5e1267a5 3031
c8301d63
DM		 3032 my $vmlist = PVE::Cluster::get_vmlist();
3033 return $vmdata if !$vmlist || !$vmlist->{ids};
3034 my $ids = $vmlist->{ids};
3035
3036 foreach my $vmid (keys %$ids) {
3037 next if !$vmid; # skip VE0
3038 my $d = $ids->{$vmid};
3039 next if !$d->{node} || $d->{node} ne $nodename;
3040 next if !$d->{type};
fdefeeab 3041 if ($d->{type} eq 'qemu') {
d9fee004 3042 if ($have_qemu_server) {
b5a16dd3 3043 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
d9fee004
DM		 3044 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3045 $qemu->{$vmid} = $conf;
3046 }
c8301d63 3047 }
3b4882dc
AG		 3048 } elsif ($d->{type} eq 'lxc') {
3049 if ($have_lxc) {
a7c85d56 3050 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3b4882dc
AG		 3051 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3052 $lxc->{$vmid} = $conf;
3053 }
3054 }
3055 }
5e1267a5 3056 }
d9fee004 3057
5e1267a5
DM		 3058 return $vmdata;
3059};
3060
e7b35711 3061sub load_vmfw_conf {
40af93c4 3062 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
e7b35711 3063
21053409 3064 $dir = $pvefw_conf_dir if !defined($dir);
8aef5177 3065 my $filename = "$dir/$vmid.fw";
585ede43
TL		 3066
3067 my $empty_conf = {
3068 rules => [],
3069 options => {},
3070 aliases => {},
3071 ipset => {} ,
3072 ipset_comments => {},
3073 };
3074
3075 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3076 $vmfw_conf->{vmid} = $vmid;
e7b35711
DM		 3077
3078 return $vmfw_conf;
3079}
3080
464f933e 3081my $format_rules = sub {
dba740a9 3082 my ($rules, $allow_iface) = @_;
464f933e
DM		 3083
3084 my $raw = '';
3085
3086 foreach my $rule (@$rules) {
c14dacdf 3087 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 3088 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3089 $raw .= uc($rule->{type});
7ca36671
DM		 3090 if ($rule->{macro}) {
3091 $raw .= " $rule->{macro}($rule->{action})";
3092 } else {
3093 $raw .= " " . $rule->{action};
3094 }
dba740a9
DM		 3095 if ($allow_iface && $rule->{iface}) {
3096 $raw .= " -i $rule->{iface}";
3097 }
c14dacdf
DM		 3098
3099 if ($rule->{type} ne 'group') {
dba740a9
DM		 3100 $raw .= " -source $rule->{source}" if $rule->{source};
3101 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3102 $raw .= " -p $rule->{proto}" if $rule->{proto};
3103 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3104 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3489f8a2 3105 $raw .= " -log $rule->{log}" if $rule->{log};
c14dacdf
DM		 3106 }
3107
cbb5d6f3 3108 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 3109 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3110 $raw .= "\n";
3111 } else {
c14dacdf 3112 die "unknown rule type '$rule->{type}'";
464f933e
DM		 3113 }
3114 }
3115
3116 return $raw;
3117};
3118
3119my $format_options = sub {
68c90e21
DM		 3120 my ($options) = @_;
3121
3122 my $raw = '';
464f933e
DM		 3123
3124 $raw .= "[OPTIONS]\n\n";
3125 foreach my $opt (keys %$options) {
3126 $raw .= "$opt: $options->{$opt}\n";
3127 }
3128 $raw .= "\n";
68c90e21
DM		 3129
3130 return $raw;
464f933e
DM		 3131};
3132
0d5f0a0f
DM		 3133my $format_aliases = sub {
3134 my ($aliases) = @_;
3135
3136 my $raw = '';
3137
3138 $raw .= "[ALIASES]\n\n";
3139 foreach my $k (keys %$aliases) {
81d574a7
DM		 3140 my $e = $aliases->{$k};
3141 $raw .= "$e->{name} $e->{cidr}";
3142 $raw .= " # " . encode('utf8', $e->{comment})
3143 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3144 $raw .= "\n";
0d5f0a0f
DM		 3145 }
3146 $raw .= "\n";
3147
3148 return $raw;
3149};
3150
1210ae94
DM		 3151my $format_ipsets = sub {
3152 my ($fw_conf) = @_;
3153
9d6f90e6
DM		 3154 my $raw = '';
3155
1210ae94
DM		 3156 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3157 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3158 my $utf8comment = encode('utf8', $comment);
3159 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3160 } else {
3161 $raw .= "[IPSET $ipset]\n\n";
3162 }
3163 my $options = $fw_conf->{ipset}->{$ipset};
6e299ae3 3164
1210ae94
DM		 3165 my $nethash = {};
3166 foreach my $entry (@$options) {
3167 $nethash->{$entry->{cidr}} = $entry;
3168 }
3169
3170 foreach my $cidr (sort keys %$nethash) {
3171 my $entry = $nethash->{$cidr};
3172 my $line = $entry->{nomatch} ? '!' : '';
3173 $line .= $entry->{cidr};
3174 $line .= " # " . encode('utf8', $entry->{comment})
3175 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3176 $raw .= "$line\n";
3177 }
3178
3179 $raw .= "\n";
9d6f90e6 3180 }
e34d0e58 3181
9d6f90e6
DM		 3182 return $raw;
3183};
3184
464f933e
DM		 3185sub save_vmfw_conf {
3186 my ($vmid, $vmfw_conf) = @_;
3187
3188 my $raw = '';
3189
3190 my $options = $vmfw_conf->{options};
89ea63c8 3191 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3192
e76a9f53 3193 my $aliases = $vmfw_conf->{aliases};
89ea63c8 3194 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e76a9f53 3195
89ea63c8 3196 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
1210ae94 3197
8824b2f0 3198 my $rules = $vmfw_conf->{rules} || [];
89ea63c8 3199 if ($rules && scalar(@$rules)) {
464f933e
DM		 3200 $raw .= "[RULES]\n\n";
3201 $raw .= &$format_rules($rules, 1);
3202 $raw .= "\n";
3203 }
3204
21053409 3205 my $filename = "$pvefw_conf_dir/$vmid.fw";
c32e04e6
FG		 3206 if ($raw) {
3207 mkdir $pvefw_conf_dir;
3208 PVE::Tools::file_set_contents($filename, $raw);
3209 } else {
3210 unlink $filename;
3211 }
464f933e
DM		 3212}
3213
edee9035
AG		 3214sub remove_vmfw_conf {
3215 my ($vmid) = @_;
3216
3217 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3218
3219 unlink $vmfw_conffile;
3220}
3221
5471ff7c
AG		 3222sub clone_vmfw_conf {
3223 my ($vmid, $newid) = @_;
3224
3225 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3226 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3227
3228 if (-f $clonevm_conffile) {
3229 unlink $clonevm_conffile;
3230 }
3231 if (-f $sourcevm_conffile) {
3232 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3233 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3234 }
3235}
3236
6fc63ffd 3237sub read_vm_firewall_configs {
40af93c4 3238 my ($cluster_conf, $vmdata, $dir) = @_;
8aef5177 3239
6fc63ffd 3240 my $vmfw_configs = {};
c8301d63 3241
b6b8e6ad 3242 foreach my $vmid (keys %{$vmdata->{qemu}}) {
40af93c4 3243 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
b6b8e6ad
DM		 3244 next if !$vmfw_conf->{options}; # skip if file does not exists
3245 $vmfw_configs->{$vmid} = $vmfw_conf;
3246 }
3b4882dc 3247 foreach my $vmid (keys %{$vmdata->{lxc}}) {
40af93c4 3248 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3b4882dc
AG		 3249 next if !$vmfw_conf->{options}; # skip if file does not exists
3250 $vmfw_configs->{$vmid} = $vmfw_conf;
3251 }
5e1267a5 3252
6fc63ffd 3253 return $vmfw_configs;
5e1267a5
DM		 3254}
3255
2d404ffc
DM		 3256sub get_option_log_level {
3257 my ($options, $k) = @_;
3258
3259 my $v = $options->{$k};
178a63be 3260 $v = $default_log_level if !defined($v);
2d404ffc
DM		 3261
3262 return undef if $v eq '' || $v eq 'nolog';
3263
3489f8a2 3264 return $v if defined($log_level_hash->{$v});
2d404ffc
DM		 3265
3266 warn "unknown log level ($k = '$v')\n";
3267
3268 return undef;
3269}
3270
d8f2505e 3271sub generate_std_chains {
db8a955f
DM		 3272 my ($ruleset, $options, $ipversion) = @_;
3273
3274 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
cbb5d6f3 3275
2d404ffc 3276 my $loglevel = get_option_log_level($options, 'smurf_log_level');
044409e5
TW		 3277 my $chain = 'PVEFW-smurflog';
3278 if ( $std_chains->{$chain} ) {
3279 foreach my $r (@{$std_chains->{$chain}}) {
3280 $r->{log} = $loglevel;
3281 }
db8a955f 3282 }
2d404ffc
DM		 3283
3284 # same as shorewall logflags action.
3285 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 3286 $chain = 'PVEFW-logflags';
044409e5
TW		 3287 if ( $std_chains->{$chain} ) {
3288 foreach my $r (@{$std_chains->{$chain}}) {
3289 $r->{log} = $loglevel;
3290 }
3291 }
d8f2505e 3292
db8a955f 3293 foreach my $chain (keys %$std_chains) {
d8f2505e 3294 ruleset_create_chain($ruleset, $chain);
db8a955f 3295 foreach my $rule (@{$std_chains->{$chain}}) {
d8f2505e 3296 if (ref($rule)) {
3489f8a2 3297 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
d8f2505e 3298 } else {
044409e5 3299 die "rule $rule as string - should not happen";
d8f2505e
DM		 3300 }
3301 }
3302 }
3303}
3304
34cdedfa 3305sub generate_ipset_chains {
74601077 3306 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
34cdedfa 3307
74601077 3308 foreach my $ipset (keys %{$ipsets}) {
34cdedfa 3309
74601077 3310 my $options = $ipsets->{$ipset};
34cdedfa 3311
ebf72e49
WB		 3312 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3313 if (my $ips = $device_ips->{$1}) {
3314 $options = [@$options, @$ips];
3315 }
3316 }
3317
88c26d5e
DM		 3318 # remove duplicates
3319 my $nethash = {};
3320 foreach my $entry (@$options) {
3321 next if $entry->{errors}; # skip entries with errors
3322 eval {
3323 my ($cidr, $ver);
3324 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3325 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3326 } else {
3327 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3328 }
3329 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3330 if ($ver == 6) {
e0a9139f
WB		 3331 # ip_compress_address takes an address only, no CIDR
3332 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3333 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3334 $cidr .= $prefix_len if defined($prefix_len);
88c26d5e
DM		 3335 $cidr =~ s|/128$||;
3336 } else {
3337 $cidr =~ s|/32$||;
3338 }
34cdedfa 3339
88c26d5e
DM		 3340 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3341 };
3342 warn $@ if $@;
3343 }
6d959e3f 3344
88c26d5e
DM		 3345 foreach my $ipversion (4, 6) {
3346 my $data = $nethash->{$ipversion};
30f1b100 3347
88c26d5e 3348 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
6d959e3f 3349
88c26d5e
DM		 3350 my $hashsize = scalar(@$options);
3351 if ($hashsize <= 64) {
3352 $hashsize = 64;
3353 } else {
3354 $hashsize = round_powerof2($hashsize);
3355 }
6d959e3f 3356
88c26d5e 3357 my $family = $ipversion == "6" ? "inet6" : "inet";
30f1b100 3358
88c26d5e 3359 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
6d959e3f 3360
88c26d5e
DM		 3361 foreach my $cidr (sort keys %$data) {
3362 my $entry = $data->{$cidr};
6d959e3f 3363
88c26d5e
DM		 3364 my $cmd = "add $name $cidr";
3365 if ($entry->{nomatch}) {
3366 if ($feature_ipset_nomatch) {
3367 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3368 } else {
3369 warn "ignore !$cidr - nomatch not supported by kernel\n";
3370 }
6d959e3f 3371 } else {
88c26d5e 3372 push @{$ipset_ruleset->{$name}}, $cmd;
6d959e3f 3373 }
9d6f90e6 3374 }
9d6f90e6 3375 }
34cdedfa 3376 }
2a052ee3
AD		 3377}
3378
3379sub round_powerof2 {
dd7a13fd 3380 my ($int) = @_;
2a052ee3 3381
dd7a13fd
DM		 3382 $int--;
3383 $int |= $int >> $_ foreach (1,2,4,8,16);
3384 return ++$int;
34cdedfa
AD		 3385}
3386
cc37e000
TL		 3387my $set_global_log_ratelimit = sub {
3388 my $cluster_opts = shift;
3389
3390 $global_log_ratelimit = '--limit 1/sec';
3391 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3392 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3393 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3394
3395 if ($limit->{enable}) {
3396 if (my $rate = $limit->{rate}) {
3397 $global_log_ratelimit = "--limit $rate";
3398 }
3399 if (my $burst = $limit->{burst}) {
3400 $global_log_ratelimit .= " --limit-burst $burst";
3401 }
3402 } else {
3403 $global_log_ratelimit = undef;
3404 }
3405 }
3406};
3407
fca39c2c 3408sub load_clusterfw_conf {
40af93c4 3409 my ($filename) = @_;
8aef5177
DM		 3410
3411 $filename = $clusterfw_conf_filename if !defined($filename);
585ede43
TL		 3412 my $empty_conf = {
3413 rules => [],
3414 options => {},
3415 aliases => {},
3416 groups => {},
3417 group_comments => {},
3418 ipset => {} ,
3419 ipset_comments => {},
3420 };
530c005e 3421
585ede43
TL		 3422 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3423 $set_global_log_ratelimit->($cluster_conf->{options});
5e1267a5 3424
fca39c2c 3425 return $cluster_conf;
e5d76bde
DM		 3426}
3427
fca39c2c
DM		 3428sub save_clusterfw_conf {
3429 my ($cluster_conf) = @_;
9c7e0858
DM		 3430
3431 my $raw = '';
9c7e0858 3432
c6f5cc88 3433 my $options = $cluster_conf->{options};
89ea63c8 3434 $raw .= &$format_options($options) if $options && scalar(keys %$options);
9c7e0858 3435
0d5f0a0f 3436 my $aliases = $cluster_conf->{aliases};
89ea63c8 3437 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e34d0e58 3438
89ea63c8 3439 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
1210ae94 3440
c6f5cc88 3441 my $rules = $cluster_conf->{rules};
89ea63c8 3442 if ($rules && scalar(@$rules)) {
c6f5cc88 3443 $raw .= "[RULES]\n\n";
63c91681 3444 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 3445 $raw .= "\n";
3446 }
3447
89ea63c8
DM		 3448 if ($cluster_conf->{groups}) {
3449 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3450 my $rules = $cluster_conf->{groups}->{$group};
3451 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3452 my $utf8comment = encode('utf8', $comment);
3453 $raw .= "[group $group] # $utf8comment\n\n";
3454 } else {
3455 $raw .= "[group $group]\n\n";
3456 }
0d22acb3 3457
89ea63c8
DM		 3458 $raw .= &$format_rules($rules, 0);
3459 $raw .= "\n";
3460 }
9c7e0858
DM		 3461 }
3462
c32e04e6
FG		 3463 if ($raw) {
3464 mkdir $pvefw_conf_dir;
3465 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3466 } else {
3467 unlink $clusterfw_conf_filename;
3468 }
9c7e0858
DM		 3469}
3470
8b27beb9 3471sub load_hostfw_conf {
40af93c4 3472 my ($cluster_conf, $filename) = @_;
8aef5177
DM		 3473
3474 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9 3475
585ede43
TL		 3476 my $empty_conf = { rules => [], options => {}};
3477 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
8b27beb9
DM		 3478}
3479
63c91681
DM		 3480sub save_hostfw_conf {
3481 my ($hostfw_conf) = @_;
3482
3483 my $raw = '';
3484
3485 my $options = $hostfw_conf->{options};
89ea63c8 3486 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3487
63c91681 3488 my $rules = $hostfw_conf->{rules};
89ea63c8 3489 if ($rules && scalar(@$rules)) {
63c91681
DM		 3490 $raw .= "[RULES]\n\n";
3491 $raw .= &$format_rules($rules, 1);
3492 $raw .= "\n";
3493 }
3494
c32e04e6
FG		 3495 if ($raw) {
3496 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3497 } else {
3498 unlink $hostfw_conf_filename;
3499 }
63c91681
DM		 3500}
3501
e5d76bde 3502sub compile {
06208a01 3503 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3dfa8a7f 3504
8aef5177
DM		 3505 my $vmfw_configs;
3506
cfd7cd9c
TW		 3507 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3508 $pve_std_chains = dclone($pve_std_chains_conf);
3509
8aef5177
DM		 3510 if ($vmdata) { # test mode
3511 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3512 my $filename = "$testdir/cluster.fw";
40af93c4 3513 $cluster_conf = load_clusterfw_conf($filename);
8aef5177
DM		 3514
3515 $filename = "$testdir/host.fw";
40af93c4 3516 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
8aef5177 3517
40af93c4 3518 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
8aef5177 3519 } else { # normal operation
40af93c4 3520 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
8aef5177 3521
40af93c4 3522 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
8aef5177 3523
06208a01 3524 # cfs_update is handled by daemon or API
328d1e87
SR		 3525 $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3526 if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
06208a01 3527
8aef5177 3528 $vmdata = read_local_vm_config();
40af93c4 3529 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
8aef5177 3530 }
3dfa8a7f 3531
84025e99 3532 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
9268573a 3533
525778d7
DM		 3534 my $localnet;
3535 if ($cluster_conf->{aliases}->{local_network}) {
3536 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3537 } else {
afcd29b3
DM		 3538 my $localnet_ver;
3539 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3540
84025e99 3541 $cluster_conf->{aliases}->{local_network} = {
afcd29b3 3542 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
525778d7
DM		 3543 }
3544
3545 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
bfc488f6 3546
06208a01
SR		 3547 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3548 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
40af93c4 3549 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
147dd882
WB		 3550 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3551
c5e8b008 3552 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
147dd882
WB		 3553}
3554
3555sub compile_iptables_filter {
06208a01 3556 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
085fd492 3557
3fa83edf
DM		 3558 my $ruleset = {};
3559
dec84fcd
DM		 3560 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3561 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 3562
fadb13dd 3563 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 3564
8b27beb9 3565 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 3566
88733a74
AD		 3567 # fixme: what log level should we use here?
3568 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3569
b409c8a8
TL		 3570 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3571 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
88733a74 3572
e2943485 3573 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
88c26d5e 3574 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
e2943485 3575
1e9c5070 3576 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
e2943485
DM		 3577
3578 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
1e9c5070 3579 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
e2943485 3580
db8a955f 3581 generate_std_chains($ruleset, $hostfw_options, $ipversion);
fadb13dd 3582
6d2ab017 3583 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 3584
35d1d6da 3585 if ($hostfw_enable) {
06208a01 3586 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
1a9978ed
DM		 3587 warn $@ if $@; # just to be sure - should not happen
3588 }
3fa83edf 3589
6158271d 3590 # generate firewall rules for QEMU VMs
0a0ba19e 3591 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
1a9978ed
DM		 3592 eval {
3593 my $conf = $vmdata->{qemu}->{$vmid};
3594 my $vmfw_conf = $vmfw_configs->{$vmid};
bd60a824 3595 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
1a9978ed 3596
0a0ba19e 3597 foreach my $netid (sort keys %$conf) {
1a9978ed
DM		 3598 next if $netid !~ m/^net(\d+)$/;
3599 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3600 next if !$net->{firewall};
1a9978ed 3601
ad722fb4 3602 my $iface = "tap${vmid}i$1";
1a9978ed
DM		 3603 my $macaddr = $net->{macaddr};
3604 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
ad722fb4 3605 $vmfw_conf, $vmid, 'IN', $ipversion);
1a9978ed 3606 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
ad722fb4 3607 $vmfw_conf, $vmid, 'OUT', $ipversion);
1a9978ed
DM		 3608 }
3609 };
3610 warn $@ if $@; # just to be sure - should not happen
3fa83edf 3611 }
c8301d63 3612
3b4882dc 3613 # generate firewall rules for LXC containers
0a0ba19e 3614 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
ad722fb4
FG		 3615 eval {
3616 my $conf = $vmdata->{lxc}->{$vmid};
3617 my $vmfw_conf = $vmfw_configs->{$vmid};
3618 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3619
3620 foreach my $netid (sort keys %$conf) {
3621 next if $netid !~ m/^net(\d+)$/;
3622 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3623 next if !$net->{firewall};
3624
3625 my $iface = "veth${vmid}i$1";
3626 my $macaddr = $net->{hwaddr};
3627 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3628 $vmfw_conf, $vmid, 'IN', $ipversion);
3629 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3630 $vmfw_conf, $vmid, 'OUT', $ipversion);
3631 }
3632 };
3633 warn $@ if $@; # just to be sure - should not happen
3b4882dc
AG		 3634 }
3635
ad722fb4 3636 if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
1e9c5070 3637 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
097820b0
AD		 3638 }
3639
147dd882
WB		 3640 return $ruleset;
3641}
3642
ebf72e49
WB		 3643sub mac_to_linklocal {
3644 my ($macaddr) = @_;
3645 my @parts = split(/:/, $macaddr);
3646 # The standard link local address uses the fe80::/64 prefix with the
3647 # modified EUI-64 identifier derived from the MAC address by flipping the
3648 # universal/local bit and inserting FF:FE in the middle.
3649 # See RFC 4291.
3650 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3651 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3652 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3653}
3654
147dd882
WB		 3655sub compile_ipsets {
3656 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3657
3658 my $localnet;
3659 if ($cluster_conf->{aliases}->{local_network}) {
3660 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3661 } else {
3662 my $localnet_ver;
3663 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3664
3665 $cluster_conf->{aliases}->{local_network} = {
3666 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3667 }
3668
3669 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3670
3671
3672 my $ipset_ruleset = {};
3673
3674 # generate ipsets for QEMU VMs
3675 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3676 eval {
3677 my $conf = $vmdata->{qemu}->{$vmid};
3678 my $vmfw_conf = $vmfw_configs->{$vmid};
3679 return if !$vmfw_conf;
3680
74601077
WB		 3681 # When the 'ipfilter' option is enabled every device for which there
3682 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3683 # ipset.
3684 # The reason is that ipfilter ipsets are always filled with standard
3685 # IPv6 link-local filters.
3686 my $ipsets = $vmfw_conf->{ipset};
3687 my $implicit_sets = {};
3688
ebf72e49
WB		 3689 my $device_ips = {};
3690 foreach my $netid (keys %$conf) {
3691 next if $netid !~ m/^net(\d+)$/;
3692 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3693 next if !$net->{firewall};
3694
74601077
WB		 3695 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3696 $implicit_sets->{"ipfilter-$netid"} = [];
3697 }
3698
ebf72e49
WB		 3699 my $macaddr = $net->{macaddr};
3700 my $linklocal = mac_to_linklocal($macaddr);
3701 $device_ips->{$netid} = [
3702 { cidr => $linklocal },
3703 { cidr => 'fe80::/10', nomatch => 1 }
3704 ];
3705 }
3706
74601077
WB		 3707 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3708 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
147dd882
WB		 3709 };
3710 warn $@ if $@; # just to be sure - should not happen
3711 }
3712
3713 # generate firewall rules for LXC containers
3714 foreach my $vmid (keys %{$vmdata->{lxc}}) {
aa229652
WB		 3715 eval {
3716 my $conf = $vmdata->{lxc}->{$vmid};
3717 my $vmfw_conf = $vmfw_configs->{$vmid};
3718 return if !$vmfw_conf;
147dd882 3719
74601077
WB		 3720 # When the 'ipfilter' option is enabled every device for which there
3721 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3722 # ipset.
3723 # The reason is that ipfilter ipsets are always filled with standard
383fe679
WB		 3724 # IPv6 link-local filters, as well as the IP addresses configured
3725 # for the container.
74601077
WB		 3726 my $ipsets = $vmfw_conf->{ipset};
3727 my $implicit_sets = {};
3728
ebf72e49
WB		 3729 my $device_ips = {};
3730 foreach my $netid (keys %$conf) {
3731 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3732 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
ebf72e49
WB		 3733 next if !$net->{firewall};
3734
74601077
WB		 3735 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3736 $implicit_sets->{"ipfilter-$netid"} = [];
3737 }
3738
ebf72e49
WB		 3739 my $macaddr = $net->{hwaddr};
3740 my $linklocal = mac_to_linklocal($macaddr);
383fe679 3741 my $set = $device_ips->{$netid} = [
ebf72e49
WB		 3742 { cidr => $linklocal },
3743 { cidr => 'fe80::/10', nomatch => 1 }
3744 ];
37ef1ce1 3745 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
383fe679
WB		 3746 push @$set, { cidr => $1 };
3747 }
37ef1ce1 3748 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
383fe679
WB		 3749 push @$set, { cidr => $1 };
3750 }
ebf72e49
WB		 3751 }
3752
74601077
WB		 3753 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3754 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
aa229652
WB		 3755 };
3756 warn $@ if $@; # just to be sure - should not happen
147dd882
WB		 3757 }
3758
74601077 3759 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
27083984 3760
147dd882 3761 return $ipset_ruleset;
3fa83edf
DM		 3762}
3763
c5e8b008 3764sub compile_ebtables_filter {
40af93c4 3765 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
c5e8b008 3766
2549e7ef 3767 if (!($cluster_conf->{options}->{ebtables} // 1)) {
84025e99
SI		 3768 return {};
3769 }
c5e8b008
AD		 3770
3771 my $ruleset = {};
3772
3773 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3774
c5e8b008
AD		 3775 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3776 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3777 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3778 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3779 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3780
3781 # generate firewall rules for QEMU VMs
2e30c5c7 3782 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
c5e8b008
AD		 3783 eval {
3784 my $conf = $vmdata->{qemu}->{$vmid};
3785 my $vmfw_conf = $vmfw_configs->{$vmid};
3786 return if !$vmfw_conf;
401c141b 3787 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3788
4a1072dd 3789 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3790 next if $netid !~ m/^net(\d+)$/;
3791 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3792 next if !$net->{firewall};
3793 my $iface = "tap${vmid}i$1";
3794 my $macaddr = $net->{macaddr};
401c141b
AD		 3795 my $arpfilter = [];
3796 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3797 foreach my $ipaddr (@$ipset) {
3798 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3799 next if !$ip || ($version && $version != 4);
3800 push(@$arpfilter, $ip);
3801 }
3802 }
3803 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3804 }
3805 };
3806 warn $@ if $@; # just to be sure - should not happen
3807 }
3808
3809 # generate firewall rules for LXC containers
2e30c5c7 3810 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
c5e8b008
AD		 3811 eval {
3812 my $conf = $vmdata->{lxc}->{$vmid};
3813
3814 my $vmfw_conf = $vmfw_configs->{$vmid};
3815 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
401c141b 3816 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3817
4a1072dd 3818 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3819 next if $netid !~ m/^net(\d+)$/;
3820 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3821 next if !$net->{firewall};
3822 my $iface = "veth${vmid}i$1";
3823 my $macaddr = $net->{hwaddr};
401c141b
AD		 3824 my $arpfilter = [];
3825 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3826 foreach my $ipaddr (@$ipset) {
3827 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3828 next if !$ip || ($version && $version != 4);
3829 push(@$arpfilter, $ip);
3830 }
3831 }
03984808 3832 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
a9068b2d
TL		 3833 # ebtables changes this to a .0/MASK network but we just
3834 # want the address here, no network - see #2193
255698f6
TL		 3835 $ip =~ s|/(\d+)$||;
3836 push @$arpfilter, $ip;
556ae5c1 3837 }
401c141b 3838 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3839 }
3840 };
3841 warn $@ if $@; # just to be sure - should not happen
3842 }
3843
3844 return $ruleset;
3845}
3846
3847sub generate_tap_layer2filter {
401c141b 3848 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
c5e8b008
AD		 3849 my $options = $vmfw_conf->{options};
3850
3851 my $tapchain = $iface."-OUT";
3852
3853 # ebtables remove zeros from mac pairs
3854 $macaddr =~ s/0([0-9a-f])/$1/ig;
3855 $macaddr = lc($macaddr);
3856
3857 ruleset_create_chain($ruleset, $tapchain);
3858
3859 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3860 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3861 }
3862
401c141b
AD		 3863 if (@$arpfilter){
3864 my $arpchain = $tapchain."-ARP";
3865 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3866 ruleset_create_chain($ruleset, $arpchain);
3867
3868 foreach my $ip (@{$arpfilter}) {
3869 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3870 }
3871 ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3872 }
3873
c5e8b008 3874 if (defined($options->{layer2_protocols})){
33efd363
AD		 3875 my $protochain = $tapchain."-PROTO";
3876 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3877 ruleset_create_chain($ruleset, $protochain);
3878
c5e8b008 3879 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
33efd363 3880 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
c5e8b008 3881 }
33efd363 3882 ruleset_addrule($ruleset, $protochain, '', '-j DROP');
c5e8b008
AD		 3883 }
3884
33efd363
AD		 3885 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3886
c5e8b008
AD		 3887 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3888}
3889
84025e99
SI		 3890# the parameter $change_only_regex changes two things if defined:
3891# * all chains not matching it will be left intact
3892# * both the $active_chains hash and the returned status_hash have different
3893# structure (they contain a key named 'rules').
3fa83edf 3894sub get_ruleset_status {
40af93c4 3895 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3fa83edf
DM		 3896
3897 my $statushash = {};
3898
3899 foreach my $chain (sort keys %$ruleset) {
84025e99
SI		 3900 my $rules = $ruleset->{$chain};
3901 my $sig = &$digest_fn($rules);
3902 my $oldsig;
9bf7d929 3903
3fa83edf 3904 $statushash->{$chain}->{sig} = $sig;
84025e99
SI		 3905 if (defined($change_only_regex)) {
3906 $oldsig = $active_chains->{$chain}->{sig};
3907 $statushash->{$chain}->{rules} = $rules;
3908 } else {
3909 $oldsig = $active_chains->{$chain};
3910 }
3fa83edf
DM		 3911 if (!defined($oldsig)) {
3912 $statushash->{$chain}->{action} = 'create';
3913 } else {
3914 if ($oldsig eq $sig) {
3915 $statushash->{$chain}->{action} = 'exists';
3916 } else {
3917 $statushash->{$chain}->{action} = 'update';
3918 }
3919 }
84025e99
SI		 3920 if ($verbose) {
3921 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3922 foreach my $cmd (@{$rules}) {
3923 print "\t$cmd\n";
3924 }
3fa83edf
DM		 3925 }
3926 }
3927
3928 foreach my $chain (sort keys %$active_chains) {
84025e99
SI		 3929 next if defined($ruleset->{$chain});
3930 my $action = 'delete';
d9551052 3931 my $sig = $active_chains->{$chain};
84025e99
SI		 3932 if (defined($change_only_regex)) {
3933 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3934 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
d9551052 3935 $sig = $sig->{sig};
84025e99 3936 }
84025e99
SI		 3937 $statushash->{$chain}->{action} = $action;
3938 $statushash->{$chain}->{sig} = $sig;
3939 print "$action $chain ($sig)\n" if $verbose;
6158271d 3940 }
2a052ee3 3941
3fa83edf
DM		 3942 return $statushash;
3943}
3944
3fa83edf
DM		 3945sub print_sig_rule {
3946 my ($chain, $sig) = @_;
3947
09d5f68e
DM		 3948 # We just use this to store a SHA1 checksum used to detect changes
3949 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 3950}
3951
df7cb349 3952sub get_ruleset_cmdlist {
40af93c4 3953 my ($ruleset, $iptablescmd) = @_;
3fa83edf 3954
3fa83edf 3955 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 3956
17da5c0f 3957 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
40af93c4 3958 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 3959
3960 # create missing chains first
3961 foreach my $chain (sort keys %$ruleset) {
3962 my $stat = $statushash->{$chain};
3963 die "internal error" if !$stat;
3964 next if $stat->{action} ne 'create';
886aba9c 3965
3fa83edf
DM		 3966 $cmdlist .= ":$chain - [0:0]\n";
3967 }
3968
4bd0a9c4 3969 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
55fad3b7
DM		 3970 my $chain = "PVEFW-$h";
3971 if ($ruleset->{$chain} && !$hooks->{$h}) {
3972 $cmdlist .= "-A $h -j $chain\n";
4bd0a9c4 3973 }
3fa83edf
DM		 3974 }
3975
3976 foreach my $chain (sort keys %$ruleset) {
3977 my $stat = $statushash->{$chain};
3978 die "internal error" if !$stat;
3979
3980 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3981 $cmdlist .= "-F $chain\n";
3982 foreach my $cmd (@{$ruleset->{$chain}}) {
3983 $cmdlist .= "$cmd\n";
3984 }
3985 $cmdlist .= print_sig_rule($chain, $stat->{sig});
3986 } elsif ($stat->{action} eq 'delete') {
f5d28682 3987 die "internal error"; # this should not happen
3fa83edf
DM		 3988 } elsif ($stat->{action} eq 'exists') {
3989 # do nothing
3990 } else {
3991 die "internal error - unknown status '$stat->{action}'";
3992 }
3993 }
3994
f5d28682
DM		 3995 foreach my $chain (keys %$statushash) {
3996 next if $statushash->{$chain}->{action} ne 'delete';
3997 $cmdlist .= "-F $chain\n";
3998 }
3999 foreach my $chain (keys %$statushash) {
4000 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 4001 next if $chain eq 'PVEFW-INPUT';
4002 next if $chain eq 'PVEFW-OUTPUT';
4003 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 4004 $cmdlist .= "-X $chain\n";
4005 }
4006
3f95d14a 4007 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 4008
3fa83edf
DM		 4009 $cmdlist .= "COMMIT\n";
4010
3f95d14a 4011 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 4012}
4013
d4a23c88 4014my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
84025e99 4015
151c209e 4016sub get_ebtables_cmdlist {
40af93c4 4017 my ($ruleset) = @_;
151c209e
AD		 4018
4019 my $changes = 0;
4020 my $cmdlist = "*filter\n";
4021
84025e99
SI		 4022 my $active_chains = ebtables_get_chains();
4023 my $statushash = get_ruleset_status($ruleset, $active_chains,
40af93c4 4024 \&iptables_chain_digest,
84025e99 4025 $pve_ebtables_chainname_regex);
151c209e 4026
84025e99
SI		 4027 # create chains first and make sure PVE rules are evaluated if active
4028 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4029 my $pve_include = 0;
4030 foreach my $chain (sort keys %$statushash) {
4031 next if ($statushash->{$chain}->{action} eq 'delete');
151c209e 4032 $cmdlist .= ":$chain ACCEPT\n";
84025e99 4033 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
151c209e
AD		 4034 }
4035
84025e99 4036 foreach my $chain (sort keys %$statushash) {
151c209e 4037 my $stat = $statushash->{$chain};
84025e99 4038 $changes = 1 if ($stat->{action} !~ 'ignore|exists');
defdf28e 4039 next if ($stat->{action} eq 'delete');
151c209e 4040
84025e99
SI		 4041 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4042 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4043 next if ! $pve_include;
4044 $pve_include = 0;
4045 }
151c209e
AD		 4046 $cmdlist .= "$cmd\n";
4047 }
4048 }
84025e99 4049 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
151c209e
AD		 4050
4051 return wantarray ? ($cmdlist, $changes) : $cmdlist;
4052}
4053
34cdedfa 4054sub get_ipset_cmdlist {
40af93c4 4055 my ($ruleset) = @_;
34cdedfa
AD		 4056
4057 my $cmdlist = "";
4058
dd7a13fd
DM		 4059 my $delete_cmdlist = "";
4060
4bd0a9c4 4061 my $active_chains = ipset_get_chains();
40af93c4 4062 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
34cdedfa 4063
e34d0e58 4064 # remove stale _swap chains
30f1b100
DM		 4065 foreach my $chain (keys %$active_chains) {
4066 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4067 $cmdlist .= "destroy $chain\n";
4068 }
4069 }
4070
c69cf614 4071 foreach my $chain (keys %$ruleset) {
c69cf614
DM		 4072 my $stat = $statushash->{$chain};
4073 die "internal error" if !$stat;
4074
4075 if ($stat->{action} eq 'create') {
4076 foreach my $cmd (@{$ruleset->{$chain}}) {
4077 $cmdlist .= "$cmd\n";
4078 }
4079 }
4080 }
4081
4082 foreach my $chain (keys %$ruleset) {
6d959e3f
DM		 4083 my $stat = $statushash->{$chain};
4084 die "internal error" if !$stat;
34cdedfa 4085
dd7a13fd
DM		 4086 if ($stat->{action} eq 'update') {
4087 my $chain_swap = $chain."_swap";
cbb5d6f3 4088
dd7a13fd
DM		 4089 foreach my $cmd (@{$ruleset->{$chain}}) {
4090 $cmd =~ s/$chain/$chain_swap/;
4091 $cmdlist .= "$cmd\n";
34cdedfa 4092 }
dd7a13fd
DM		 4093 $cmdlist .= "swap $chain_swap $chain\n";
4094 $cmdlist .= "flush $chain_swap\n";
4095 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 4096 }
dd7a13fd 4097 }
3f95d14a 4098
88c26d5e 4099 # the remove unused chains
c69cf614 4100 foreach my $chain (keys %$statushash) {
dd7a13fd 4101 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 4102
dd7a13fd
DM		 4103 $delete_cmdlist .= "flush $chain\n";
4104 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 4105 }
4106
dd7a13fd 4107 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 4108
dd7a13fd 4109 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 4110}
4111
6b9f68a2 4112sub apply_ruleset {
40af93c4 4113 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
6b9f68a2
DM		 4114
4115 enable_bridge_firewall();
4116
cbb5d6f3 4117 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
40af93c4 4118 get_ipset_cmdlist($ipset_ruleset);
6b9f68a2 4119
40af93c4
TL		 4120 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4121 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4122 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
2a052ee3 4123
81a0bf43
DM		 4124 if ($verbose) {
4125 if ($ipset_changes) {
4126 print "ipset changes:\n";
4127 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4128 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4129 }
3f95d14a 4130
81a0bf43
DM		 4131 if ($changes) {
4132 print "iptables changes:\n";
4133 print $cmdlist;
4134 }
17da5c0f
AD		 4135
4136 if ($changesv6) {
4137 print "ip6tables changes:\n";
4138 print $cmdlistv6;
4139 }
151c209e
AD		 4140
4141 if ($ebtables_changes) {
4142 print "ebtables changes:\n";
4143 print $ebtables_cmdlist;
4144 }
81a0bf43 4145 }
3fa83edf 4146
259db1e6
DM		 4147 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4148 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4149
2a052ee3 4150 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 4151
259db1e6
DM		 4152 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4153 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4154
3fa83edf 4155 iptables_restore_cmdlist($cmdlist);
259db1e6
DM		 4156
4157 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4158 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4159
17da5c0f 4160 ip6tables_restore_cmdlist($cmdlistv6);
3fa83edf 4161
259db1e6
DM		 4162 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4163 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4164
dd7a13fd 4165 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 4166
151c209e
AD		 4167 ebtables_restore_cmdlist($ebtables_cmdlist);
4168
4169 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4170 PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4171
6158271d 4172 # test: re-read status and check if everything is up to date
4bd0a9c4 4173 my $active_chains = iptables_get_chains();
40af93c4 4174 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 4175
4176 my $errors;
4177 foreach my $chain (sort keys %$ruleset) {
4178 my $stat = $statushash->{$chain};
4179 if ($stat->{action} ne 'exists') {
4180 warn "unable to update chain '$chain'\n";
4181 $errors = 1;
4182 }
4183 }
b6360c3f 4184
17da5c0f 4185 my $active_chainsv6 = iptables_get_chains("ip6tables");
40af93c4 4186 my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
17da5c0f
AD		 4187
4188 foreach my $chain (sort keys %$rulesetv6) {
4189 my $stat = $statushashv6->{$chain};
4190 if ($stat->{action} ne 'exists') {
4191 warn "unable to update chain '$chain'\n";
4192 $errors = 1;
4193 }
4194 }
4195
151c209e 4196 my $active_ebtables_chains = ebtables_get_chains();
84025e99
SI		 4197 my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4198 $active_ebtables_chains, \&iptables_chain_digest,
40af93c4 4199 $pve_ebtables_chainname_regex);
151c209e
AD		 4200
4201 foreach my $chain (sort keys %$ebtables_ruleset) {
4202 my $stat = $ebtables_statushash->{$chain};
4203 if ($stat->{action} ne 'exists') {
4204 warn "ebtables : unable to update chain '$chain'\n";
4205 $errors = 1;
4206 }
4207 }
4208
3fa83edf 4209 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 4210
4211 update_nf_conntrack_max($hostfw_conf);
4212
4213 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4214
6c27f4f3 4215 update_nf_conntrack_logging($hostfw_conf);
b6360c3f
DM		 4216}
4217
490cdead
DM		 4218sub update_nf_conntrack_max {
4219 my ($hostfw_conf) = @_;
4220
4221 my $max = 65536; # reasonable default
4222
4223 my $options = $hostfw_conf->{options} || {};
4224
4225 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4226 $max = $options->{nf_conntrack_max};
4227 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4228 }
4229
4230 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4231 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4232
4233 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4234
4235 if ($current != $max) {
4236 my $hashsize = int($max/4);
4237 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4238 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4239 }
4240}
4241
28c082a1
AD		 4242sub update_nf_conntrack_tcp_timeout_established {
4243 my ($hostfw_conf) = @_;
4244
4245 my $options = $hostfw_conf->{options} || {};
4246
4247 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4248
4249 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4250}
4251
6c27f4f3
DL		 4252my $log_nf_conntrack_enabled = undef;
4253sub update_nf_conntrack_logging {
4254 my ($hostfw_conf) = @_;
4255
4256 my $options = $hostfw_conf->{options} || {};
4257 my $value = $options->{log_nf_conntrack} || 0;
4258 if (!defined($log_nf_conntrack_enabled)
4259 || $value != $log_nf_conntrack_enabled)
4260 {
4261 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4262 PVE::Tools::file_set_contents($tmpfile, $value);
4263
c1031ab1 4264 run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
6c27f4f3
DL		 4265 $log_nf_conntrack_enabled = $value;
4266 }
4267}
4268
c4a2e5ae
DM		 4269sub remove_pvefw_chains {
4270
7b7b2654
AD		 4271 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4272 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4273 PVE::Firewall::remove_pvefw_chains_ipset();
0e8af63d 4274 PVE::Firewall::remove_pvefw_chains_ebtables();
7b7b2654
AD		 4275
4276}
4277
4278sub remove_pvefw_chains_iptables {
4279 my ($iptablescmd) = @_;
4280
4281 my ($chash, $hooks) = iptables_get_chains($iptablescmd);
c4a2e5ae
DM		 4282 my $cmdlist = "*filter\n";
4283
4284 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4285 if ($hooks->{$h}) {
4286 $cmdlist .= "-D $h -j PVEFW-$h\n";
4287 }
4288 }
cbb5d6f3 4289
c4a2e5ae
DM		 4290 foreach my $chain (keys %$chash) {
4291 $cmdlist .= "-F $chain\n";
4292 }
4293
4294 foreach my $chain (keys %$chash) {
4295 $cmdlist .= "-X $chain\n";
4296 }
4297 $cmdlist .= "COMMIT\n";
4298
7b7b2654
AD		 4299 if($iptablescmd eq "ip6tables") {
4300 ip6tables_restore_cmdlist($cmdlist);
4301 } else {
4302 iptables_restore_cmdlist($cmdlist);
4303 }
4304}
4305
4306sub remove_pvefw_chains_ipset {
55fad3b7
DM		 4307
4308 my $ipset_chains = ipset_get_chains();
4309
7b7b2654 4310 my $cmdlist = "";
55fad3b7
DM		 4311
4312 foreach my $chain (keys %$ipset_chains) {
88c26d5e
DM		 4313 $cmdlist .= "flush $chain\n";
4314 $cmdlist .= "destroy $chain\n";
55fad3b7
DM		 4315 }
4316
7b7b2654 4317 ipset_restore_cmdlist($cmdlist) if $cmdlist;
c4a2e5ae
DM		 4318}
4319
0e8af63d
FG		 4320sub remove_pvefw_chains_ebtables {
4321 # apply empty ruleset = remove all our chains
4322 ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4323}
4324
8b453a09
DM		 4325sub init {
4326 my $cluster_conf = load_clusterfw_conf();
4327 my $cluster_options = $cluster_conf->{options};
4328 my $enable = $cluster_options->{enable};
4329
4330 return if !$enable;
4331
4332 # load required modules here
4333}
4334
6b9f68a2 4335sub update {
6b9f68a2 4336 my $code = sub {
3dfa8a7f
DM		 4337
4338 my $cluster_conf = load_clusterfw_conf();
4339 my $cluster_options = $cluster_conf->{options};
4340
55fad3b7 4341 if (!$cluster_options->{enable}) {
b22130d3 4342 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 4343 return;
4344 }
4345
50f9a28d 4346 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3dfa8a7f 4347
c5e8b008 4348 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
490cdead 4349
151c209e 4350 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
6b9f68a2
DM		 4351 };
4352
4353 run_locked($code);
4354}
4355
b6360c3f 43561;
Firewall test scripts