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remove a level of indirection on FW config parsing
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
585ede43 5
cbb5d6f3 6use POSIX;
b6360c3f 7use Data::Dumper;
09d5f68e 8use Digest::SHA;
6d959e3f 9use Socket qw(AF_INET6 inet_ntop inet_pton);
c8301d63 10use PVE::INotify;
7ca36671 11use PVE::Exception qw(raise raise_param_exc);
e74a87f5 12use PVE::JSONSchema qw(register_standard_option get_standard_option);
c8301d63 13use PVE::Cluster;
5f0a912c 14use PVE::ProcFSTools;
70e524eb 15use PVE::Tools qw($IPV4RE $IPV6RE);
2e1ae6b9 16use PVE::Network;
eedcb564 17use PVE::SafeSyslog;
6b9f68a2 18use File::Basename;
5e1267a5
DM		 19use File::Path;
20use IO::File;
ecbea048 21use Net::IP;
1a301a8d 22use PVE::Tools qw(run_command lock_file dir_glob_foreach);
30c1ae52 23use Encode;
cfd7cd9c 24use Storable qw(dclone);
ecbea048 25
63c91681 26my $hostfw_conf_filename = "/etc/pve/local/host.fw";
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
DM		 129my $nodename = PVE::INotify::nodename();
130
06320eb0
DM		 131my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
132
56f313f7 133my $default_log_level = 'nolog'; # avoid logs by default
cc37e000
TL		 134my $global_log_ratelimit = '--limit 1/sec';
135
2d404ffc
DM		 136my $log_level_hash = {
137 debug => 7,
138 info => 6,
139 notice => 5,
140 warning => 4,
141 err => 3,
142 crit => 2,
143 alert => 1,
144 emerg => 0,
145};
146
40af93c4
TL		 147my $verbose = 0;
148sub set_verbose {
149 $verbose = shift;
150}
151
044409e5
TW		 152# %rule
153#
154# name => optional
30c390f9 155# enable => [0|1]
044409e5
TW		 156# action =>
157# proto =>
30c390f9
TW		 158# sport => port[,port[,port]].. or port:port
159# dport => port[,port[,port]].. or port:port
044409e5
TW		 160# log => optional, loglevel
161# logmsg => optional, logmsg - overwrites default
30c390f9
TW		 162# iface_in => incomin interface
163# iface_out => outgoing interface
044409e5
TW		 164# match => optional, overwrites generation of match
165# target => optional, overwrites action
166
35d1d6da
DM		 167# we need to overwrite some macros for ipv6
168my $pve_ipv6fw_macros = {
169 'Ping' => [
170 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
171 ],
b3d75afb
WB		 172 'NeighborDiscovery' => [
173 "IPv6 neighbor solicitation, neighbor and router advertisement",
c71cdd44 174 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
b3d75afb
WB		 175 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
176 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
177 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
178 ],
a42e9763 179 'DHCPv6' => [
24dd51c2 180 "DHCPv6 traffic",
a42e9763
WB		 181 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
182 ],
35d1d6da
DM		 183 'Trcrt' => [
184 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
185 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
186 ],
187 };
188
857f62c8 189# imported/converted from: /usr/share/shorewall/macro.*
961b4928 190my $pve_fw_macros = {
857f62c8 191 'Amanda' => [
ebd54ae9 192 "Amanda Backup",
857f62c8
DM		 193 { action => 'PARAM', proto => 'udp', dport => '10080' },
194 { action => 'PARAM', proto => 'tcp', dport => '10080' },
195 ],
196 'Auth' => [
ebd54ae9 197 "Auth (identd) traffic",
857f62c8
DM		 198 { action => 'PARAM', proto => 'tcp', dport => '113' },
199 ],
200 'BGP' => [
ebd54ae9 201 "Border Gateway Protocol traffic",
857f62c8
DM		 202 { action => 'PARAM', proto => 'tcp', dport => '179' },
203 ],
204 'BitTorrent' => [
ebd54ae9 205 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 206 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 207 { action => 'PARAM', proto => 'udp', dport => '6881' },
208 ],
209 'BitTorrent32' => [
ebd54ae9 210 "BitTorrent traffic for BitTorrent 3.2 and later",
857f62c8
DM		 211 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
212 { action => 'PARAM', proto => 'udp', dport => '6881' },
213 ],
06ba9c44
AG		 214 'Ceph' => [
215 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
216 { action => 'PARAM', proto => 'tcp', dport => '6789' },
217 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
218 ],
857f62c8 219 'CVS' => [
ebd54ae9 220 "Concurrent Versions System pserver traffic",
857f62c8
DM		 221 { action => 'PARAM', proto => 'tcp', dport => '2401' },
222 ],
223 'Citrix' => [
ebd54ae9 224 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 225 { action => 'PARAM', proto => 'tcp', dport => '1494' },
226 { action => 'PARAM', proto => 'udp', dport => '1604' },
227 { action => 'PARAM', proto => 'tcp', dport => '2598' },
228 ],
229 'DAAP' => [
ebd54ae9 230 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 231 { action => 'PARAM', proto => 'tcp', dport => '3689' },
232 { action => 'PARAM', proto => 'udp', dport => '3689' },
233 ],
234 'DCC' => [
ebd54ae9 235 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 236 { action => 'PARAM', proto => 'tcp', dport => '6277' },
237 ],
238 'DHCPfwd' => [
d2c3266d 239 "Forwarded DHCP traffic",
857f62c8 240 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 241 ],
242 'DNS' => [
ebd54ae9 243 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 244 { action => 'PARAM', proto => 'udp', dport => '53' },
245 { action => 'PARAM', proto => 'tcp', dport => '53' },
246 ],
247 'Distcc' => [
ebd54ae9 248 "Distributed Compiler service",
857f62c8
DM		 249 { action => 'PARAM', proto => 'tcp', dport => '3632' },
250 ],
857f62c8 251 'FTP' => [
ebd54ae9 252 "File Transfer Protocol",
857f62c8
DM		 253 { action => 'PARAM', proto => 'tcp', dport => '21' },
254 ],
255 'Finger' => [
ebd54ae9 256 "Finger protocol (RFC 742)",
857f62c8
DM		 257 { action => 'PARAM', proto => 'tcp', dport => '79' },
258 ],
259 'GNUnet' => [
ebd54ae9 260 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 261 { action => 'PARAM', proto => 'tcp', dport => '2086' },
262 { action => 'PARAM', proto => 'udp', dport => '2086' },
263 { action => 'PARAM', proto => 'tcp', dport => '1080' },
264 { action => 'PARAM', proto => 'udp', dport => '1080' },
265 ],
266 'GRE' => [
d2c3266d 267 "Generic Routing Encapsulation tunneling protocol",
857f62c8 268 { action => 'PARAM', proto => '47' },
857f62c8
DM		 269 ],
270 'Git' => [
ebd54ae9 271 "Git distributed revision control traffic",
857f62c8
DM		 272 { action => 'PARAM', proto => 'tcp', dport => '9418' },
273 ],
857f62c8 274 'HKP' => [
ebd54ae9 275 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 276 { action => 'PARAM', proto => 'tcp', dport => '11371' },
277 ],
278 'HTTP' => [
ebd54ae9 279 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 280 { action => 'PARAM', proto => 'tcp', dport => '80' },
281 ],
857f62c8 282 'HTTPS' => [
ebd54ae9 283 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 284 { action => 'PARAM', proto => 'tcp', dport => '443' },
285 ],
286 'ICPV2' => [
ebd54ae9 287 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 288 { action => 'PARAM', proto => 'udp', dport => '3130' },
289 ],
290 'ICQ' => [
ebd54ae9 291 "AOL Instant Messenger traffic",
857f62c8
DM		 292 { action => 'PARAM', proto => 'tcp', dport => '5190' },
293 ],
294 'IMAP' => [
ebd54ae9 295 "Internet Message Access Protocol",
857f62c8
DM		 296 { action => 'PARAM', proto => 'tcp', dport => '143' },
297 ],
298 'IMAPS' => [
ebd54ae9 299 "Internet Message Access Protocol over SSL",
857f62c8
DM		 300 { action => 'PARAM', proto => 'tcp', dport => '993' },
301 ],
302 'IPIP' => [
d2c3266d 303 "IPIP capsulation traffic",
857f62c8 304 { action => 'PARAM', proto => '94' },
857f62c8 305 ],
857f62c8 306 'IPsec' => [
d2c3266d 307 "IPsec traffic",
857f62c8
DM		 308 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
309 { action => 'PARAM', proto => '50' },
857f62c8
DM		 310 ],
311 'IPsecah' => [
d2c3266d 312 "IPsec authentication (AH) traffic",
857f62c8
DM		 313 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
314 { action => 'PARAM', proto => '51' },
857f62c8
DM		 315 ],
316 'IPsecnat' => [
d2c3266d 317 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 318 { action => 'PARAM', proto => 'udp', dport => '500' },
319 { action => 'PARAM', proto => 'udp', dport => '4500' },
320 { action => 'PARAM', proto => '50' },
857f62c8
DM		 321 ],
322 'IRC' => [
ebd54ae9 323 "Internet Relay Chat traffic",
857f62c8
DM		 324 { action => 'PARAM', proto => 'tcp', dport => '6667' },
325 ],
857f62c8 326 'Jetdirect' => [
ebd54ae9 327 "HP Jetdirect printing",
857f62c8
DM		 328 { action => 'PARAM', proto => 'tcp', dport => '9100' },
329 ],
330 'L2TP' => [
ebd54ae9 331 "Layer 2 Tunneling Protocol traffic",
857f62c8 332 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 333 ],
334 'LDAP' => [
ebd54ae9 335 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 336 { action => 'PARAM', proto => 'tcp', dport => '389' },
337 ],
338 'LDAPS' => [
ebd54ae9 339 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 340 { action => 'PARAM', proto => 'tcp', dport => '636' },
341 ],
342 'MSNP' => [
ebd54ae9 343 "Microsoft Notification Protocol",
857f62c8
DM		 344 { action => 'PARAM', proto => 'tcp', dport => '1863' },
345 ],
346 'MSSQL' => [
ebd54ae9 347 "Microsoft SQL Server",
857f62c8
DM		 348 { action => 'PARAM', proto => 'tcp', dport => '1433' },
349 ],
350 'Mail' => [
ebd54ae9 351 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 352 { action => 'PARAM', proto => 'tcp', dport => '25' },
353 { action => 'PARAM', proto => 'tcp', dport => '465' },
354 { action => 'PARAM', proto => 'tcp', dport => '587' },
355 ],
7831e1e3
EK		 356 'MDNS' => [
357 "Multicast DNS",
358 { action => 'PARAM', proto => 'udp', dport => '5353' },
359 ],
857f62c8 360 'Munin' => [
ebd54ae9 361 "Munin networked resource monitoring traffic",
857f62c8
DM		 362 { action => 'PARAM', proto => 'tcp', dport => '4949' },
363 ],
364 'MySQL' => [
ebd54ae9 365 "MySQL server",
857f62c8
DM		 366 { action => 'PARAM', proto => 'tcp', dport => '3306' },
367 ],
368 'NNTP' => [
ebd54ae9 369 "NNTP traffic (Usenet).",
857f62c8
DM		 370 { action => 'PARAM', proto => 'tcp', dport => '119' },
371 ],
372 'NNTPS' => [
ebd54ae9 373 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 374 { action => 'PARAM', proto => 'tcp', dport => '563' },
375 ],
376 'NTP' => [
ebd54ae9 377 "Network Time Protocol (ntpd)",
857f62c8
DM		 378 { action => 'PARAM', proto => 'udp', dport => '123' },
379 ],
857f62c8 380 'OSPF' => [
ebd54ae9 381 "OSPF multicast traffic",
857f62c8
DM		 382 { action => 'PARAM', proto => '89' },
383 ],
384 'OpenVPN' => [
ebd54ae9 385 "OpenVPN traffic",
857f62c8
DM		 386 { action => 'PARAM', proto => 'udp', dport => '1194' },
387 ],
388 'PCA' => [
ebd54ae9 389 "Symantec PCAnywere (tm)",
857f62c8
DM		 390 { action => 'PARAM', proto => 'udp', dport => '5632' },
391 { action => 'PARAM', proto => 'tcp', dport => '5631' },
392 ],
393 'POP3' => [
ebd54ae9 394 "POP3 traffic",
857f62c8
DM		 395 { action => 'PARAM', proto => 'tcp', dport => '110' },
396 ],
397 'POP3S' => [
ebd54ae9 398 "Encrypted POP3 traffic",
857f62c8
DM		 399 { action => 'PARAM', proto => 'tcp', dport => '995' },
400 ],
401 'PPtP' => [
ebd54ae9 402 "Point-to-Point Tunneling Protocol",
857f62c8 403 { action => 'PARAM', proto => '47' },
857f62c8
DM		 404 { action => 'PARAM', proto => 'tcp', dport => '1723' },
405 ],
406 'Ping' => [
ebd54ae9 407 "ICMP echo request",
269d4f13 408 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 409 ],
410 'PostgreSQL' => [
ebd54ae9 411 "PostgreSQL server",
857f62c8
DM		 412 { action => 'PARAM', proto => 'tcp', dport => '5432' },
413 ],
414 'Printer' => [
ebd54ae9 415 "Line Printer protocol printing",
857f62c8
DM		 416 { action => 'PARAM', proto => 'tcp', dport => '515' },
417 ],
418 'RDP' => [
ebd54ae9 419 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 420 { action => 'PARAM', proto => 'tcp', dport => '3389' },
421 ],
d2c3266d 422 'RIP' => [
ebd54ae9 423 "Routing Information Protocol (bidirectional)",
857f62c8 424 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 425 ],
426 'RNDC' => [
ebd54ae9 427 "BIND remote management protocol",
857f62c8
DM		 428 { action => 'PARAM', proto => 'tcp', dport => '953' },
429 ],
430 'Razor' => [
ebd54ae9 431 "Razor Antispam System",
056f9211 432 { action => 'PARAM', proto => 'tcp', dport => '2703' },
857f62c8
DM		 433 ],
434 'Rdate' => [
ebd54ae9 435 "Remote time retrieval (rdate)",
857f62c8
DM		 436 { action => 'PARAM', proto => 'tcp', dport => '37' },
437 ],
438 'Rsync' => [
ebd54ae9 439 "Rsync server",
857f62c8
DM		 440 { action => 'PARAM', proto => 'tcp', dport => '873' },
441 ],
442 'SANE' => [
ebd54ae9 443 "SANE network scanning",
857f62c8
DM		 444 { action => 'PARAM', proto => 'tcp', dport => '6566' },
445 ],
446 'SMB' => [
ebd54ae9 447 "Microsoft SMB traffic",
857f62c8
DM		 448 { action => 'PARAM', proto => 'udp', dport => '135,445' },
449 { action => 'PARAM', proto => 'udp', dport => '137:139' },
450 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
451 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
452 ],
857f62c8 453 'SMBswat' => [
ebd54ae9 454 "Samba Web Administration Tool",
857f62c8
DM		 455 { action => 'PARAM', proto => 'tcp', dport => '901' },
456 ],
457 'SMTP' => [
ebd54ae9 458 "Simple Mail Transfer Protocol",
857f62c8
DM		 459 { action => 'PARAM', proto => 'tcp', dport => '25' },
460 ],
461 'SMTPS' => [
ebd54ae9 462 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 463 { action => 'PARAM', proto => 'tcp', dport => '465' },
464 ],
465 'SNMP' => [
ebd54ae9 466 "Simple Network Management Protocol",
857f62c8
DM		 467 { action => 'PARAM', proto => 'udp', dport => '161:162' },
468 { action => 'PARAM', proto => 'tcp', dport => '161' },
469 ],
470 'SPAMD' => [
ebd54ae9 471 "Spam Assassin SPAMD traffic",
857f62c8
DM		 472 { action => 'PARAM', proto => 'tcp', dport => '783' },
473 ],
474 'SSH' => [
ebd54ae9 475 "Secure shell traffic",
857f62c8
DM		 476 { action => 'PARAM', proto => 'tcp', dport => '22' },
477 ],
478 'SVN' => [
ebd54ae9 479 "Subversion server (svnserve)",
857f62c8
DM		 480 { action => 'PARAM', proto => 'tcp', dport => '3690' },
481 ],
482 'SixXS' => [
ebd54ae9 483 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 484 { action => 'PARAM', proto => 'tcp', dport => '3874' },
485 { action => 'PARAM', proto => 'udp', dport => '3740' },
486 { action => 'PARAM', proto => '41' },
487 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
488 ],
489 'Squid' => [
ebd54ae9 490 "Squid web proxy traffic",
857f62c8
DM		 491 { action => 'PARAM', proto => 'tcp', dport => '3128' },
492 ],
493 'Submission' => [
ebd54ae9 494 "Mail message submission traffic",
857f62c8
DM		 495 { action => 'PARAM', proto => 'tcp', dport => '587' },
496 ],
497 'Syslog' => [
ebd54ae9 498 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 499 { action => 'PARAM', proto => 'udp', dport => '514' },
500 { action => 'PARAM', proto => 'tcp', dport => '514' },
501 ],
502 'TFTP' => [
ebd54ae9 503 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 504 { action => 'PARAM', proto => 'udp', dport => '69' },
505 ],
506 'Telnet' => [
ebd54ae9 507 "Telnet traffic",
857f62c8
DM		 508 { action => 'PARAM', proto => 'tcp', dport => '23' },
509 ],
510 'Telnets' => [
ebd54ae9 511 "Telnet over SSL",
857f62c8
DM		 512 { action => 'PARAM', proto => 'tcp', dport => '992' },
513 ],
514 'Time' => [
ebd54ae9 515 "RFC 868 Time protocol",
857f62c8
DM		 516 { action => 'PARAM', proto => 'tcp', dport => '37' },
517 ],
518 'Trcrt' => [
ebd54ae9 519 "Traceroute (for up to 30 hops) traffic",
857f62c8 520 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 521 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 522 ],
523 'VNC' => [
93be4333
DM		 524 "VNC traffic for VNC display's 0 - 99",
525 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
857f62c8
DM		 526 ],
527 'VNCL' => [
ebd54ae9 528 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 529 { action => 'PARAM', proto => 'tcp', dport => '5500' },
530 ],
531 'Web' => [
ebd54ae9 532 "WWW traffic (HTTP and HTTPS)",
857f62c8 533 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 534 { action => 'PARAM', proto => 'tcp', dport => '443' },
535 ],
857f62c8 536 'Webcache' => [
ebd54ae9 537 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 538 { action => 'PARAM', proto => 'tcp', dport => '8080' },
539 ],
540 'Webmin' => [
ebd54ae9 541 "Webmin traffic",
857f62c8
DM		 542 { action => 'PARAM', proto => 'tcp', dport => '10000' },
543 ],
544 'Whois' => [
ebd54ae9 545 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 546 { action => 'PARAM', proto => 'tcp', dport => '43' },
547 ],
961b4928
DM		 548};
549
550my $pve_fw_parsed_macros;
ebd54ae9 551my $pve_fw_macro_descr;
21a18e53 552my $pve_fw_macro_ipversion = {};
961b4928 553my $pve_fw_preferred_macro_names = {};
3a616aa0 554
fe3d79b4
WB		 555my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
556my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
557
5547adf7 558my $pve_std_chains = {};
cfd7cd9c
TW		 559my $pve_std_chains_conf = {};
560$pve_std_chains_conf->{4} = {
d8f2505e 561 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 562 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
d8f2505e 563 ],
79929d9c
DM		 564 'PVEFW-DropBroadcast' => [
565 # same as shorewall 'Broadcast'
566 # simply DROP BROADCAST/MULTICAST/ANYCAST
567 # we can use this to reduce logging
568 { action => 'DROP', dsttype => 'BROADCAST' },
569 { action => 'DROP', dsttype => 'MULTICAST' },
570 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 571 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 572 ],
573 'PVEFW-reject' => [
574 # same as shorewall 'reject'
575 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 576 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c 577 { action => 'DROP', proto => 'icmp' },
044409e5
TW		 578 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
579 { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
580 { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
581 { target => '-j REJECT --reject-with icmp-host-prohibited' },
79929d9c
DM		 582 ],
583 'PVEFW-Drop' => [
cbb5d6f3 584 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 585 # but REJECT/DROP some packages to reduce logging,
586 # and ACCEPT critical ICMP types
587 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
588 # we are not interested in BROADCAST/MULTICAST/ANYCAST
589 { action => 'PVEFW-DropBroadcast' },
590 # ACCEPT critical ICMP types
591 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
592 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
593 # Drop packets with INVALID state
044409e5 594 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 595 # Drop Microsoft SMB noise
e4882cff
TW		 596 { action => 'DROP', proto => 'udp', dport => '135,445' },
597 { action => 'DROP', proto => 'udp', dport => '137:139' },
79929d9c 598 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 599 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 600 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
601 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 602 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 603 # Drop DNS replies
604 { action => 'DROP', proto => 'udp', sport => 53 },
605 ],
606 'PVEFW-Reject' => [
cbb5d6f3 607 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 608 # but REJECT/DROP some packages to reduce logging,
609 # and ACCEPT critical ICMP types
610 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
611 # we are not interested in BROADCAST/MULTICAST/ANYCAST
612 { action => 'PVEFW-DropBroadcast' },
613 # ACCEPT critical ICMP types
614 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
615 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
616 # Drop packets with INVALID state
044409e5 617 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 618 # Drop Microsoft SMB noise
e4882cff 619 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
79929d9c
DM		 620 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
621 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 622 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 623 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
624 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 625 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 626 # Drop DNS replies
627 { action => 'DROP', proto => 'udp', sport => 53 },
628 ],
d86659ef
DM		 629 'PVEFW-tcpflags' => [
630 # same as shorewall tcpflags action.
631 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
044409e5
TW		 632 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
633 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
634 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
635 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
636 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
d86659ef 637 ],
bee633ab
DM		 638 'PVEFW-smurfs' => [
639 # same as shorewall smurfs action
640 # Filter packets for smurfs (packets with a broadcast address as the source).
044409e5
TW		 641 { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
642 { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
643 { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
644 ],
645 'PVEFW-smurflog' => [
646 { action => 'DROP', logmsg => 'DROP: ' },
647 ],
648 'PVEFW-logflags' => [
649 { action => 'DROP', logmsg => 'DROP: ' },
bee633ab 650 ],
d8f2505e
DM		 651};
652
cfd7cd9c 653$pve_std_chains_conf->{6} = {
47a79ff2 654 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 655 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
47a79ff2
AD		 656 ],
657 'PVEFW-DropBroadcast' => [
044409e5
TW		 658 # same as shorewall 'Broadcast'
659 # simply DROP BROADCAST/MULTICAST/ANYCAST
660 # we can use this to reduce logging
661 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
649cd835
DM		 662 # ipv6 addrtype does not work with kernel 2.6.32
663 #{ action => 'DROP', dsttype => 'MULTICAST' },
044409e5
TW		 664 #{ action => 'DROP', dsttype => 'ANYCAST' },
665 { action => 'DROP', dest => 'ff00::/8' },
666 #{ action => 'DROP', dest => '224.0.0.0/4' },
47a79ff2
AD		 667 ],
668 'PVEFW-reject' => [
044409e5
TW		 669 # same as shorewall 'reject'
670 #{ action => 'DROP', dsttype => 'BROADCAST' },
671 #{ action => 'DROP', source => '224.0.0.0/4' },
649cd835 672 { action => 'DROP', proto => 'icmpv6' },
044409e5
TW		 673 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
674 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
675 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
676 #"-j REJECT --reject-with icmp-host-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
59f9b456 1754 run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
3a616aa0
AD		 1755}
1756
17da5c0f
AD		 1757sub ip6tables_restore_cmdlist {
1758 my ($cmdlist) = @_;
1759
59f9b456 1760 run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
17da5c0f
AD		 1761}
1762
34cdedfa
AD		 1763sub ipset_restore_cmdlist {
1764 my ($cmdlist) = @_;
1765
ff5363da 1766 run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
34cdedfa
AD		 1767}
1768
151c209e
AD		 1769sub ebtables_restore_cmdlist {
1770 my ($cmdlist) = @_;
1771
1772 run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1773}
1774
de2a57cd 1775sub iptables_get_chains {
17da5c0f
AD		 1776 my ($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->{$1} = 1;
de2a57cd
DM		 1825 } else {
1826 # simply ignore the rest
1827 return;
1828 }
1829 };
1830
17da5c0f 1831 run_command("/sbin/$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
ff5363da 1875 run_command("/sbin/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
1906 run_command("/sbin/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 # create chain with mac and ip filter
88c26d5e 2367 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
9e15114a 2368
a34cfdd0 2369 if ($options->{enable}) {
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",
3489f8a2 2394 "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
3cc81077 2395 } else {
a01c32c7 2396 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
3489f8a2 2397 "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain", $loglevel, 'FWBR-OUT: ', $vmid);
3cc81077 2398 }
3a616aa0
AD		 2399}
2400
d18c1e2b 2401sub enable_host_firewall {
aedde2c2 2402 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
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
3fa83edf 2409 # host inbound firewall
dec84fcd
DM		 2410 my $chain = "PVEFW-HOST-IN";
2411 ruleset_create_chain($ruleset, $chain);
0bd5f137 2412
178a63be
DM		 2413 my $loglevel = get_option_log_level($options, "log_level_in");
2414
1e9c5070 2415 ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
4ac863a6 2416
27c49e25 2417 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e8415920 2418 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
88c26d5e 2419 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
fb424a00 2420
23e888f8
DM		 2421 # we use RETURN because we need to check also tap rules
2422 my $accept_action = 'RETURN';
2423
1e9c5070 2424 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2425
35f0c37e
DM		 2426 # add host rules first, so that cluster wide rules can be overwritten
2427 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2428 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2429 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
bfc488f6 2430
f8b12fff 2431 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
5383df39 2432
1a9978ed
DM		 2433 eval {
2434 if ($rule->{type} eq 'group') {
aedde2c2 2435 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
1a9978ed 2436 } elsif ($rule->{type} eq 'in') {
180da76c 2437 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2438 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2439 }
2440 };
2441 warn $@ if $@;
f8b12fff 2442 delete $rule->{iface_in};
0bd5f137 2443 }
eb399cef
DM		 2444
2445 # allow standard traffic for management ipset (includes cluster network)
88c26d5e 2446 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
708ba714 2447 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1e9c5070
TW		 2448 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
2449 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2450 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2451 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
bfc488f6 2452
afcd29b3
DM		 2453 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2454 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
3bc79f87 2455
eb399cef 2456 # corosync
35d1d6da 2457 if ($localnet && ($ipversion == $localnet_ver)) {
1e9c5070
TW		 2458 my $corosync_rule = "-p udp --dport 5404:5405";
2459 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2460 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
3bc79f87 2461 }
0bd5f137 2462
23e888f8 2463 # implement input policy
63324b09 2464 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
88c26d5e 2465 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
0bd5f137 2466
3fa83edf 2467 # host outbound firewall
aadd745e 2468 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 2469 ruleset_create_chain($ruleset, $chain);
2470
178a63be
DM		 2471 $loglevel = get_option_log_level($options, "log_level_out");
2472
1e9c5070 2473 ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
e2943485 2474
27c49e25 2475 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e2943485 2476
23e888f8
DM		 2477 # we use RETURN because we may want to check other thigs later
2478 $accept_action = 'RETURN';
e8415920 2479 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
23e888f8 2480
1e9c5070 2481 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2482
35f0c37e
DM		 2483 # add host rules first, so that cluster wide rules can be overwritten
2484 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2485 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2486 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
5383df39 2487
f8b12fff 2488 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1a9978ed 2489 eval {
3489f8a2 2490 $rule->{logmsg} = "$rule->{action}: ";
1a9978ed 2491 if ($rule->{type} eq 'group') {
aedde2c2 2492 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
1a9978ed 2493 } elsif ($rule->{type} eq 'out') {
180da76c 2494 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2495 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2496 }
2497 };
2498 warn $@ if $@;
f8b12fff 2499 delete $rule->{iface_out};
0bd5f137
AD		 2500 }
2501
3bc79f87 2502 # allow standard traffic on cluster network
35d1d6da 2503 if ($localnet && ($ipversion == $localnet_ver)) {
1e9c5070
TW		 2504 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
2505 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
2506 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2507 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
bfc488f6 2508
1e9c5070
TW		 2509 my $corosync_rule = "-p udp --dport 5404:5405";
2510 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2511 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
3bc79f87
DM		 2512 }
2513
23e888f8 2514 # implement output policy
63324b09 2515 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
88c26d5e 2516 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
6158271d 2517
1e9c5070
TW		 2518 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2519 ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
9d31b418
AD		 2520}
2521
2522sub generate_group_rules {
aedde2c2 2523 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
9d31b418 2524
c6f5cc88 2525 my $rules = $cluster_conf->{groups}->{$group};
6158271d 2526
b4deedab
DM		 2527 if (!$rules) {
2528 warn "no such security group '$group'\n";
2529 $rules = []; # create empty chain
2530 }
2531
3fa83edf 2532 my $chain = "GROUP-${group}-IN";
9d31b418 2533
3fa83edf 2534 ruleset_create_chain($ruleset, $chain);
1e9c5070 2535 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2536
92e976b3
DM		 2537 foreach my $rule (@$rules) {
2538 next if $rule->{type} ne 'in';
7a5a402b 2539 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2540 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
180da76c 2541 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2dc0a26e 2542 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418
AD		 2543 }
2544
3fa83edf 2545 $chain = "GROUP-${group}-OUT";
9d31b418 2546
3fa83edf 2547 ruleset_create_chain($ruleset, $chain);
1e9c5070 2548 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2549
92e976b3
DM		 2550 foreach my $rule (@$rules) {
2551 next if $rule->{type} ne 'out';
7a5a402b 2552 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2553 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
92e976b3
DM		 2554 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2555 # check also other tap rules later
180da76c 2556 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2dc0a26e 2557 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418 2558 }
9d31b418
AD		 2559}
2560
51bae274
DM		 2561my $MAX_NETS = 32;
2562my $valid_netdev_names = {};
2563for (my $i = 0; $i < $MAX_NETS; $i++) {
2564 $valid_netdev_names->{"net$i"} = 1;
2565}
5e1267a5 2566
fe3d79b4
WB		 2567sub get_mark_values {
2568 my ($value, $mask) = @_;
2569 $value = hex($value) if $value =~ /^0x/;
2570 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2571 $mask = 0xffffffff if !defined($mask);
2572 return ($value, $mask);
2573}
2574
51bae274 2575sub parse_fw_rule {
40af93c4 2576 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
5e1267a5 2577
d4cda423
DM		 2578 my $orig_line = $line;
2579
6d9246e7
DM		 2580 my $rule = {};
2581
11bac5c2 2582 # we can add single line comments to the end of the rule
6d9246e7
DM		 2583 if ($line =~ s/#\s*(.*?)\s*$//) {
2584 $rule->{comment} = decode('utf8', $1);
2585 }
11bac5c2
DM		 2586
2587 # we can disable a rule when prefixed with '|'
ea9e5116 2588
6d9246e7 2589 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
51bae274 2590
dba740a9
DM		 2591 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2592 die "unable to parse rule: $line\n";
6d9246e7
DM		 2593
2594 $rule->{type} = lc($1);
2595 $rule->{action} = $2;
2596
2597 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2598 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2599 $rule->{macro} = $1;
2600 $rule->{action} = $2;
92e976b3 2601 }
51bae274
DM		 2602 }
2603
dba740a9
DM		 2604 while (length($line)) {
2605 if ($line =~ s/^-i (\S+)\s*//) {
6d9246e7 2606 $rule->{iface} = $1;
dba740a9
DM		 2607 next;
2608 }
51bae274 2609
6d9246e7 2610 last if $rule->{type} eq 'group';
51bae274 2611
dba740a9 2612 if ($line =~ s/^-p (\S+)\s*//) {
6d9246e7 2613 $rule->{proto} = $1;
dba740a9
DM		 2614 next;
2615 }
6d9246e7 2616
dba740a9 2617 if ($line =~ s/^-dport (\S+)\s*//) {
6d9246e7 2618 $rule->{dport} = $1;
dba740a9
DM		 2619 next;
2620 }
6d9246e7 2621
dba740a9 2622 if ($line =~ s/^-sport (\S+)\s*//) {
6d9246e7 2623 $rule->{sport} = $1;
dba740a9
DM		 2624 next;
2625 }
2626 if ($line =~ s/^-source (\S+)\s*//) {
6d9246e7 2627 $rule->{source} = $1;
dba740a9
DM		 2628 next;
2629 }
2630 if ($line =~ s/^-dest (\S+)\s*//) {
6d9246e7 2631 $rule->{dest} = $1;
dba740a9
DM		 2632 next;
2633 }
3489f8a2
CE		 2634 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2635 $rule->{log} = $1;
2636 next;
2637 }
51bae274 2638
dba740a9
DM		 2639 last;
2640 }
ba791b1f 2641
dba740a9 2642 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 2643
a523e057 2644 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
eedcb564
WB		 2645 if ($rule->{errors}) {
2646 # The verbose flag really means we're running from the CLI and want
2647 # output on the console - in the other case we really want such errors
2648 # to go into the syslog instead.
2649 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2650 $log->("$prefix - errors in rule parameters: $orig_line\n");
d4cda423 2651 foreach my $p (keys %{$rule->{errors}}) {
eedcb564 2652 $log->(" $p: $rule->{errors}->{$p}\n");
d4cda423
DM		 2653 }
2654 }
6d9246e7
DM		 2655
2656 return $rule;
51bae274
DM		 2657}
2658
c5e8b008
AD		 2659sub verify_ethertype {
2660 my ($value) = @_;
2661 my $types = get_etc_ethertypes();
2662 die "unknown ethernet protocol type: $value\n"
2663 if !defined($types->{byname}->{$value}) &&
2664 !defined($types->{byid}->{$value});
2665}
2666
2d404ffc 2667sub parse_vmfw_option {
85c6eaed
DM		 2668 my ($line) = @_;
2669
2670 my ($opt, $value);
2671
178a63be
DM		 2672 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2673
74601077 2674 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 2675 $opt = lc($1);
2676 $value = int($2);
178a63be
DM		 2677 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2678 $opt = lc($1);
2679 $value = $2 ? lc($3) : '';
72f63fde 2680 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 2681 $opt = lc($1);
2682 $value = uc($3);
b47ecc88
AD		 2683 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2684 $opt = lc($1);
2685 $value = $2;
c5e8b008
AD		 2686 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2687 $opt = lc($1);
2688 $value = $2;
2689 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
9c6b6efd 2690 } else {
85c6eaed
DM		 2691 die "can't parse option '$line'\n"
2692 }
2693
2694 return ($opt, $value);
2695}
2696
2d404ffc
DM		 2697sub parse_hostfw_option {
2698 my ($line) = @_;
2699
2700 my ($opt, $value);
2701
2702 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2703
27c49e25 2704 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2d404ffc
DM		 2705 $opt = lc($1);
2706 $value = int($2);
178a63be 2707 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 2708 $opt = lc($1);
2709 $value = $2 ? lc($3) : '';
28c082a1 2710 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 2711 $opt = lc($1);
2712 $value = int($2);
2d404ffc 2713 } else {
2d404ffc
DM		 2714 die "can't parse option '$line'\n"
2715 }
2716
2717 return ($opt, $value);
2718}
2719
c6f5cc88
DM		 2720sub parse_clusterfw_option {
2721 my ($line) = @_;
2722
2723 my ($opt, $value);
2724
72d055fc 2725 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
c6f5cc88
DM		 2726 $opt = lc($1);
2727 $value = int($2);
72d055fc
AG		 2728 if (($value > 1) && ((time() - $value) > 60)) {
2729 $value = 0
2730 }
2549e7ef 2731 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
84025e99
SI		 2732 $opt = lc($1);
2733 $value = int($2);
63324b09
DM		 2734 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2735 $opt = lc($1);
2736 $value = uc($3);
cc37e000
TL		 2737 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2738 $opt = lc($1);
2739 $value = $2;
c6f5cc88 2740 } else {
c6f5cc88
DM		 2741 die "can't parse option '$line'\n"
2742 }
2743
2744 return ($opt, $value);
2745}
2746
6c221576
DM		 2747sub resolve_alias {
2748 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2749
6d959e3f 2750 my $alias = lc($cidr);
04f5088f 2751 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
6d959e3f 2752 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
6c221576 2753
6d959e3f
DM		 2754 die "no such alias '$cidr'\n" if !$e;;
2755
2756 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
6c221576
DM		 2757}
2758
ae029a88
DM		 2759sub parse_ip_or_cidr {
2760 my ($cidr) = @_;
2761
2762 my $ipversion;
2763
2764 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2765 $cidr =~ s|/128$||;
2766 $ipversion = 6;
2767 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2768 $cidr =~ s|/32$||;
2769 $ipversion = 4;
2770 } else {
2771 die "value does not look like a valid IP address or CIDR network\n";
2772 }
2773
2774 return wantarray ? ($cidr, $ipversion) : $cidr;
2775}
2776
e76a9f53 2777sub parse_alias {
92e1209b
AD		 2778 my ($line) = @_;
2779
81d574a7
DM		 2780 # we can add single line comments to the end of the line
2781 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2782
92e1209b 2783 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7 2784 my ($name, $cidr) = ($1, $2);
ae029a88
DM		 2785 my $ipversion;
2786
2787 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2788
81d574a7
DM		 2789 my $data = {
2790 name => $name,
2791 cidr => $cidr,
70e524eb 2792 ipversion => $ipversion,
81d574a7
DM		 2793 };
2794 $data->{comment} = $comment if $comment;
2795 return $data;
92e1209b
AD		 2796 }
2797
81d574a7 2798 return undef;
92e1209b
AD		 2799}
2800
e5cd1ee0 2801sub generic_fw_config_parser {
585ede43
TL		 2802 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2803
2804 my $fh = IO::File->new($filename, O_RDONLY);
2805 return {} if !$fh;
5e1267a5 2806
51bae274
DM		 2807 my $section;
2808 my $group;
2809
1210ae94 2810 my $res = $empty_conf;
6158271d 2811
51bae274
DM		 2812 while (defined(my $line = <$fh>)) {
2813 next if $line =~ m/^#/;
2814 next if $line =~ m/^\s*$/;
2815
c8c534f7
DM		 2816 chomp $line;
2817
961b4928
DM		 2818 my $linenr = $fh->input_line_number();
2819 my $prefix = "$filename (line $linenr)";
2820
1210ae94 2821 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
c6f5cc88
DM		 2822 $section = 'options';
2823 next;
2824 }
2825
1210ae94 2826 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
92e1209b
AD		 2827 $section = 'aliases';
2828 next;
2829 }
2830
1210ae94 2831 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
c6f5cc88 2832 $section = 'groups';
92e976b3 2833 $group = lc($1);
0d22acb3 2834 my $comment = $2;
351052d1
DM		 2835 eval {
2836 die "security group name too long\n" if length($group) > $max_group_name_length;
2837 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2838 };
2839 if (my $err = $@) {
2840 ($section, $group, $comment) = undef;
2841 warn "$prefix: $err";
2842 next;
2843 }
2844
c85c87f9 2845 $res->{$section}->{$group} = [];
649e4d57
DM		 2846 $res->{group_comments}->{$group} = decode('utf8', $comment)
2847 if $comment;
51bae274
DM		 2848 next;
2849 }
34cdedfa 2850
1210ae94 2851 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
c6f5cc88
DM		 2852 $section = 'rules';
2853 next;
2854 }
cbb5d6f3 2855
1210ae94 2856 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
34cdedfa
AD		 2857 $section = 'ipset';
2858 $group = lc($1);
d72c631c 2859 my $comment = $2;
351052d1
DM		 2860 eval {
2861 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2862 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2863 };
2864 if (my $err = $@) {
2865 ($section, $group, $comment) = undef;
2866 warn "$prefix: $err";
2867 next;
2868 }
2869
c85c87f9 2870 $res->{$section}->{$group} = [];
e34d0e58 2871 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2872 if $comment;
34cdedfa
AD		 2873 next;
2874 }
2875
c6f5cc88 2876 if (!$section) {
cbb5d6f3 2877 warn "$prefix: skip line - no section\n";
51bae274
DM		 2878 next;
2879 }
2880
c6f5cc88
DM		 2881 if ($section eq 'options') {
2882 eval {
1210ae94
DM		 2883 my ($opt, $value);
2884 if ($rule_env eq 'cluster') {
2885 ($opt, $value) = parse_clusterfw_option($line);
2886 } elsif ($rule_env eq 'host') {
2887 ($opt, $value) = parse_hostfw_option($line);
2888 } else {
2889 ($opt, $value) = parse_vmfw_option($line);
2890 }
c6f5cc88
DM		 2891 $res->{options}->{$opt} = $value;
2892 };
2893 warn "$prefix: $@" if $@;
92e1209b
AD		 2894 } elsif ($section eq 'aliases') {
2895 eval {
e76a9f53 2896 my $data = parse_alias($line);
81d574a7 2897 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2898 };
2899 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2900 } elsif ($section eq 'rules') {
2901 my $rule;
40af93c4 2902 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
c6f5cc88
DM		 2903 if (my $err = $@) {
2904 warn "$prefix: $err";
2905 next;
2906 }
2907 push @{$res->{$section}}, $rule;
2908 } elsif ($section eq 'groups') {
34cdedfa 2909 my $rule;
40af93c4 2910 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
34cdedfa
AD		 2911 if (my $err = $@) {
2912 warn "$prefix: $err";
2913 next;
2914 }
3f95d14a 2915 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2916 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2917 # we can add single line comments to the end of the rule
2918 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2919
30f1b100 2920 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2921 my $nomatch = $1;
9d6f90e6 2922 my $cidr = $2;
d46b1ef6
DM		 2923 my $errors;
2924
2925 if ($nomatch && !$feature_ipset_nomatch) {
2926 $errors->{nomatch} = "nomatch not supported by kernel";
2927 }
2a052ee3 2928
4803b296
DM		 2929 eval {
2930 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2931 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2932 } else {
ae029a88 2933 $cidr = parse_ip_or_cidr($cidr);
92e1209b 2934 }
4803b296
DM		 2935 };
2936 if (my $err = $@) {
c8c534f7 2937 chomp $err;
d46b1ef6 2938 $errors->{cidr} = $err;
2a052ee3 2939 }
2a052ee3 2940
b14db52f
WB		 2941 if ($cidr =~ m!/0+$!) {
2942 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2943 }
2944
e34d0e58 2945 my $entry = { cidr => $cidr };
9d6f90e6
DM		 2946 $entry->{nomatch} = 1 if $nomatch;
2947 $entry->{comment} = $comment if $comment;
d46b1ef6 2948 $entry->{errors} = $errors if $errors;
e34d0e58 2949
c8c534f7 2950 if ($verbose && $errors) {
9a3061c7 2951 warn "$prefix - errors in ipset '$group': $line\n";
c8c534f7
DM		 2952 foreach my $p (keys %{$errors}) {
2953 warn " $p: $errors->{$p}\n";
2954 }
2955 }
2956
9d6f90e6 2957 push @{$res->{$section}->{$group}}, $entry;
1210ae94
DM		 2958 } else {
2959 warn "$prefix: skip line - unknown section\n";
2960 next;
51bae274 2961 }
5e1267a5
DM		 2962 }
2963
2964 return $res;
2965}
2966
06320eb0
DM		 2967sub run_locked {
2968 my ($code, @param) = @_;
2969
2970 my $timeout = 10;
2971
2972 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2973
2974 die $@ if $@;
2975
2976 return $res;
2977}
2978
5e1267a5
DM		 2979sub read_local_vm_config {
2980
5e1267a5 2981 my $qemu = {};
3b4882dc 2982 my $lxc = {};
5e1267a5 2983
fdefeeab 2984 my $vmdata = { qemu => $qemu, lxc => $lxc };
5e1267a5 2985
c8301d63
DM		 2986 my $vmlist = PVE::Cluster::get_vmlist();
2987 return $vmdata if !$vmlist || !$vmlist->{ids};
2988 my $ids = $vmlist->{ids};
2989
2990 foreach my $vmid (keys %$ids) {
2991 next if !$vmid; # skip VE0
2992 my $d = $ids->{$vmid};
2993 next if !$d->{node} || $d->{node} ne $nodename;
2994 next if !$d->{type};
fdefeeab 2995 if ($d->{type} eq 'qemu') {
d9fee004 2996 if ($have_qemu_server) {
b5a16dd3 2997 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
d9fee004
DM		 2998 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2999 $qemu->{$vmid} = $conf;
3000 }
c8301d63 3001 }
3b4882dc
AG		 3002 } elsif ($d->{type} eq 'lxc') {
3003 if ($have_lxc) {
a7c85d56 3004 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3b4882dc
AG		 3005 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3006 $lxc->{$vmid} = $conf;
3007 }
3008 }
3009 }
5e1267a5 3010 }
d9fee004 3011
5e1267a5
DM		 3012 return $vmdata;
3013};
3014
e7b35711 3015sub load_vmfw_conf {
40af93c4 3016 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
e7b35711 3017
21053409 3018 $dir = $pvefw_conf_dir if !defined($dir);
8aef5177 3019 my $filename = "$dir/$vmid.fw";
585ede43
TL		 3020
3021 my $empty_conf = {
3022 rules => [],
3023 options => {},
3024 aliases => {},
3025 ipset => {} ,
3026 ipset_comments => {},
3027 };
3028
3029 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3030 $vmfw_conf->{vmid} = $vmid;
e7b35711
DM		 3031
3032 return $vmfw_conf;
3033}
3034
464f933e 3035my $format_rules = sub {
dba740a9 3036 my ($rules, $allow_iface) = @_;
464f933e
DM		 3037
3038 my $raw = '';
3039
3040 foreach my $rule (@$rules) {
c14dacdf 3041 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 3042 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3043 $raw .= uc($rule->{type});
7ca36671
DM		 3044 if ($rule->{macro}) {
3045 $raw .= " $rule->{macro}($rule->{action})";
3046 } else {
3047 $raw .= " " . $rule->{action};
3048 }
dba740a9
DM		 3049 if ($allow_iface && $rule->{iface}) {
3050 $raw .= " -i $rule->{iface}";
3051 }
c14dacdf
DM		 3052
3053 if ($rule->{type} ne 'group') {
dba740a9
DM		 3054 $raw .= " -source $rule->{source}" if $rule->{source};
3055 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3056 $raw .= " -p $rule->{proto}" if $rule->{proto};
3057 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3058 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3489f8a2 3059 $raw .= " -log $rule->{log}" if $rule->{log};
c14dacdf
DM		 3060 }
3061
cbb5d6f3 3062 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 3063 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3064 $raw .= "\n";
3065 } else {
c14dacdf 3066 die "unknown rule type '$rule->{type}'";
464f933e
DM		 3067 }
3068 }
3069
3070 return $raw;
3071};
3072
3073my $format_options = sub {
68c90e21
DM		 3074 my ($options) = @_;
3075
3076 my $raw = '';
464f933e
DM		 3077
3078 $raw .= "[OPTIONS]\n\n";
3079 foreach my $opt (keys %$options) {
3080 $raw .= "$opt: $options->{$opt}\n";
3081 }
3082 $raw .= "\n";
68c90e21
DM		 3083
3084 return $raw;
464f933e
DM		 3085};
3086
0d5f0a0f
DM		 3087my $format_aliases = sub {
3088 my ($aliases) = @_;
3089
3090 my $raw = '';
3091
3092 $raw .= "[ALIASES]\n\n";
3093 foreach my $k (keys %$aliases) {
81d574a7
DM		 3094 my $e = $aliases->{$k};
3095 $raw .= "$e->{name} $e->{cidr}";
3096 $raw .= " # " . encode('utf8', $e->{comment})
3097 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3098 $raw .= "\n";
0d5f0a0f
DM		 3099 }
3100 $raw .= "\n";
3101
3102 return $raw;
3103};
3104
1210ae94
DM		 3105my $format_ipsets = sub {
3106 my ($fw_conf) = @_;
3107
9d6f90e6
DM		 3108 my $raw = '';
3109
1210ae94
DM		 3110 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3111 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3112 my $utf8comment = encode('utf8', $comment);
3113 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3114 } else {
3115 $raw .= "[IPSET $ipset]\n\n";
3116 }
3117 my $options = $fw_conf->{ipset}->{$ipset};
6e299ae3 3118
1210ae94
DM		 3119 my $nethash = {};
3120 foreach my $entry (@$options) {
3121 $nethash->{$entry->{cidr}} = $entry;
3122 }
3123
3124 foreach my $cidr (sort keys %$nethash) {
3125 my $entry = $nethash->{$cidr};
3126 my $line = $entry->{nomatch} ? '!' : '';
3127 $line .= $entry->{cidr};
3128 $line .= " # " . encode('utf8', $entry->{comment})
3129 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3130 $raw .= "$line\n";
3131 }
3132
3133 $raw .= "\n";
9d6f90e6 3134 }
e34d0e58 3135
9d6f90e6
DM		 3136 return $raw;
3137};
3138
464f933e
DM		 3139sub save_vmfw_conf {
3140 my ($vmid, $vmfw_conf) = @_;
3141
3142 my $raw = '';
3143
3144 my $options = $vmfw_conf->{options};
89ea63c8 3145 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3146
e76a9f53 3147 my $aliases = $vmfw_conf->{aliases};
89ea63c8 3148 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e76a9f53 3149
89ea63c8 3150 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
1210ae94 3151
8824b2f0 3152 my $rules = $vmfw_conf->{rules} || [];
89ea63c8 3153 if ($rules && scalar(@$rules)) {
464f933e
DM		 3154 $raw .= "[RULES]\n\n";
3155 $raw .= &$format_rules($rules, 1);
3156 $raw .= "\n";
3157 }
3158
21053409 3159 my $filename = "$pvefw_conf_dir/$vmid.fw";
c32e04e6
FG		 3160 if ($raw) {
3161 mkdir $pvefw_conf_dir;
3162 PVE::Tools::file_set_contents($filename, $raw);
3163 } else {
3164 unlink $filename;
3165 }
464f933e
DM		 3166}
3167
edee9035
AG		 3168sub remove_vmfw_conf {
3169 my ($vmid) = @_;
3170
3171 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3172
3173 unlink $vmfw_conffile;
3174}
3175
5471ff7c
AG		 3176sub clone_vmfw_conf {
3177 my ($vmid, $newid) = @_;
3178
3179 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3180 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3181
3182 if (-f $clonevm_conffile) {
3183 unlink $clonevm_conffile;
3184 }
3185 if (-f $sourcevm_conffile) {
3186 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3187 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3188 }
3189}
3190
6fc63ffd 3191sub read_vm_firewall_configs {
40af93c4 3192 my ($cluster_conf, $vmdata, $dir) = @_;
8aef5177 3193
6fc63ffd 3194 my $vmfw_configs = {};
c8301d63 3195
b6b8e6ad 3196 foreach my $vmid (keys %{$vmdata->{qemu}}) {
40af93c4 3197 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
b6b8e6ad
DM		 3198 next if !$vmfw_conf->{options}; # skip if file does not exists
3199 $vmfw_configs->{$vmid} = $vmfw_conf;
3200 }
3b4882dc 3201 foreach my $vmid (keys %{$vmdata->{lxc}}) {
40af93c4 3202 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3b4882dc
AG		 3203 next if !$vmfw_conf->{options}; # skip if file does not exists
3204 $vmfw_configs->{$vmid} = $vmfw_conf;
3205 }
5e1267a5 3206
6fc63ffd 3207 return $vmfw_configs;
5e1267a5
DM		 3208}
3209
2d404ffc
DM		 3210sub get_option_log_level {
3211 my ($options, $k) = @_;
3212
3213 my $v = $options->{$k};
178a63be 3214 $v = $default_log_level if !defined($v);
2d404ffc
DM		 3215
3216 return undef if $v eq '' || $v eq 'nolog';
3217
3489f8a2 3218 return $v if defined($log_level_hash->{$v});
2d404ffc
DM		 3219
3220 warn "unknown log level ($k = '$v')\n";
3221
3222 return undef;
3223}
3224
d8f2505e 3225sub generate_std_chains {
db8a955f
DM		 3226 my ($ruleset, $options, $ipversion) = @_;
3227
3228 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
cbb5d6f3 3229
2d404ffc 3230 my $loglevel = get_option_log_level($options, 'smurf_log_level');
044409e5
TW		 3231 my $chain = 'PVEFW-smurflog';
3232 if ( $std_chains->{$chain} ) {
3233 foreach my $r (@{$std_chains->{$chain}}) {
3234 $r->{log} = $loglevel;
3235 }
db8a955f 3236 }
2d404ffc
DM		 3237
3238 # same as shorewall logflags action.
3239 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 3240 $chain = 'PVEFW-logflags';
044409e5
TW		 3241 if ( $std_chains->{$chain} ) {
3242 foreach my $r (@{$std_chains->{$chain}}) {
3243 $r->{log} = $loglevel;
3244 }
3245 }
d8f2505e 3246
db8a955f 3247 foreach my $chain (keys %$std_chains) {
d8f2505e 3248 ruleset_create_chain($ruleset, $chain);
db8a955f 3249 foreach my $rule (@{$std_chains->{$chain}}) {
d8f2505e 3250 if (ref($rule)) {
3489f8a2 3251 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
d8f2505e 3252 } else {
044409e5 3253 die "rule $rule as string - should not happen";
d8f2505e
DM		 3254 }
3255 }
3256 }
3257}
3258
34cdedfa 3259sub generate_ipset_chains {
74601077 3260 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
34cdedfa 3261
74601077 3262 foreach my $ipset (keys %{$ipsets}) {
34cdedfa 3263
74601077 3264 my $options = $ipsets->{$ipset};
34cdedfa 3265
ebf72e49
WB		 3266 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3267 if (my $ips = $device_ips->{$1}) {
3268 $options = [@$options, @$ips];
3269 }
3270 }
3271
88c26d5e
DM		 3272 # remove duplicates
3273 my $nethash = {};
3274 foreach my $entry (@$options) {
3275 next if $entry->{errors}; # skip entries with errors
3276 eval {
3277 my ($cidr, $ver);
3278 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3279 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3280 } else {
3281 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3282 }
3283 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3284 if ($ver == 6) {
e0a9139f
WB		 3285 # ip_compress_address takes an address only, no CIDR
3286 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3287 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3288 $cidr .= $prefix_len if defined($prefix_len);
88c26d5e
DM		 3289 $cidr =~ s|/128$||;
3290 } else {
3291 $cidr =~ s|/32$||;
3292 }
34cdedfa 3293
88c26d5e
DM		 3294 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3295 };
3296 warn $@ if $@;
3297 }
6d959e3f 3298
88c26d5e
DM		 3299 foreach my $ipversion (4, 6) {
3300 my $data = $nethash->{$ipversion};
30f1b100 3301
88c26d5e 3302 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
6d959e3f 3303
88c26d5e
DM		 3304 my $hashsize = scalar(@$options);
3305 if ($hashsize <= 64) {
3306 $hashsize = 64;
3307 } else {
3308 $hashsize = round_powerof2($hashsize);
3309 }
6d959e3f 3310
88c26d5e 3311 my $family = $ipversion == "6" ? "inet6" : "inet";
30f1b100 3312
88c26d5e 3313 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
6d959e3f 3314
88c26d5e
DM		 3315 foreach my $cidr (sort keys %$data) {
3316 my $entry = $data->{$cidr};
6d959e3f 3317
88c26d5e
DM		 3318 my $cmd = "add $name $cidr";
3319 if ($entry->{nomatch}) {
3320 if ($feature_ipset_nomatch) {
3321 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3322 } else {
3323 warn "ignore !$cidr - nomatch not supported by kernel\n";
3324 }
6d959e3f 3325 } else {
88c26d5e 3326 push @{$ipset_ruleset->{$name}}, $cmd;
6d959e3f 3327 }
9d6f90e6 3328 }
9d6f90e6 3329 }
34cdedfa 3330 }
2a052ee3
AD		 3331}
3332
3333sub round_powerof2 {
dd7a13fd 3334 my ($int) = @_;
2a052ee3 3335
dd7a13fd
DM		 3336 $int--;
3337 $int |= $int >> $_ foreach (1,2,4,8,16);
3338 return ++$int;
34cdedfa
AD		 3339}
3340
cc37e000
TL		 3341my $set_global_log_ratelimit = sub {
3342 my $cluster_opts = shift;
3343
3344 $global_log_ratelimit = '--limit 1/sec';
3345 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3346 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3347 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3348
3349 if ($limit->{enable}) {
3350 if (my $rate = $limit->{rate}) {
3351 $global_log_ratelimit = "--limit $rate";
3352 }
3353 if (my $burst = $limit->{burst}) {
3354 $global_log_ratelimit .= " --limit-burst $burst";
3355 }
3356 } else {
3357 $global_log_ratelimit = undef;
3358 }
3359 }
3360};
3361
fca39c2c 3362sub load_clusterfw_conf {
40af93c4 3363 my ($filename) = @_;
8aef5177
DM		 3364
3365 $filename = $clusterfw_conf_filename if !defined($filename);
585ede43
TL		 3366 my $empty_conf = {
3367 rules => [],
3368 options => {},
3369 aliases => {},
3370 groups => {},
3371 group_comments => {},
3372 ipset => {} ,
3373 ipset_comments => {},
3374 };
530c005e 3375
585ede43
TL		 3376 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3377 $set_global_log_ratelimit->($cluster_conf->{options});
5e1267a5 3378
fca39c2c 3379 return $cluster_conf;
e5d76bde
DM		 3380}
3381
fca39c2c
DM		 3382sub save_clusterfw_conf {
3383 my ($cluster_conf) = @_;
9c7e0858
DM		 3384
3385 my $raw = '';
9c7e0858 3386
c6f5cc88 3387 my $options = $cluster_conf->{options};
89ea63c8 3388 $raw .= &$format_options($options) if $options && scalar(keys %$options);
9c7e0858 3389
0d5f0a0f 3390 my $aliases = $cluster_conf->{aliases};
89ea63c8 3391 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e34d0e58 3392
89ea63c8 3393 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
1210ae94 3394
c6f5cc88 3395 my $rules = $cluster_conf->{rules};
89ea63c8 3396 if ($rules && scalar(@$rules)) {
c6f5cc88 3397 $raw .= "[RULES]\n\n";
63c91681 3398 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 3399 $raw .= "\n";
3400 }
3401
89ea63c8
DM		 3402 if ($cluster_conf->{groups}) {
3403 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3404 my $rules = $cluster_conf->{groups}->{$group};
3405 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3406 my $utf8comment = encode('utf8', $comment);
3407 $raw .= "[group $group] # $utf8comment\n\n";
3408 } else {
3409 $raw .= "[group $group]\n\n";
3410 }
0d22acb3 3411
89ea63c8
DM		 3412 $raw .= &$format_rules($rules, 0);
3413 $raw .= "\n";
3414 }
9c7e0858
DM		 3415 }
3416
c32e04e6
FG		 3417 if ($raw) {
3418 mkdir $pvefw_conf_dir;
3419 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3420 } else {
3421 unlink $clusterfw_conf_filename;
3422 }
9c7e0858
DM		 3423}
3424
8b27beb9 3425sub load_hostfw_conf {
40af93c4 3426 my ($cluster_conf, $filename) = @_;
8aef5177
DM		 3427
3428 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9 3429
585ede43
TL		 3430 my $empty_conf = { rules => [], options => {}};
3431 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
8b27beb9
DM		 3432}
3433
63c91681
DM		 3434sub save_hostfw_conf {
3435 my ($hostfw_conf) = @_;
3436
3437 my $raw = '';
3438
3439 my $options = $hostfw_conf->{options};
89ea63c8 3440 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3441
63c91681 3442 my $rules = $hostfw_conf->{rules};
89ea63c8 3443 if ($rules && scalar(@$rules)) {
63c91681
DM		 3444 $raw .= "[RULES]\n\n";
3445 $raw .= &$format_rules($rules, 1);
3446 $raw .= "\n";
3447 }
3448
c32e04e6
FG		 3449 if ($raw) {
3450 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3451 } else {
3452 unlink $hostfw_conf_filename;
3453 }
63c91681
DM		 3454}
3455
e5d76bde 3456sub compile {
40af93c4 3457 my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
3dfa8a7f 3458
8aef5177
DM		 3459 my $vmfw_configs;
3460
cfd7cd9c
TW		 3461 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3462 $pve_std_chains = dclone($pve_std_chains_conf);
3463
8aef5177
DM		 3464 if ($vmdata) { # test mode
3465 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3466 my $filename = "$testdir/cluster.fw";
40af93c4 3467 $cluster_conf = load_clusterfw_conf($filename);
8aef5177
DM		 3468
3469 $filename = "$testdir/host.fw";
40af93c4 3470 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
8aef5177 3471
40af93c4 3472 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
8aef5177 3473 } else { # normal operation
40af93c4 3474 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
8aef5177 3475
40af93c4 3476 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
8aef5177
DM		 3477
3478 $vmdata = read_local_vm_config();
40af93c4 3479 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
8aef5177 3480 }
3dfa8a7f 3481
84025e99 3482 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
9268573a 3483
525778d7
DM		 3484 my $localnet;
3485 if ($cluster_conf->{aliases}->{local_network}) {
3486 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3487 } else {
afcd29b3
DM		 3488 my $localnet_ver;
3489 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3490
84025e99 3491 $cluster_conf->{aliases}->{local_network} = {
afcd29b3 3492 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
525778d7
DM		 3493 }
3494
3495 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
bfc488f6 3496
40af93c4
TL		 3497 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4);
3498 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6);
3499 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
147dd882
WB		 3500 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3501
c5e8b008 3502 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
147dd882
WB		 3503}
3504
3505sub compile_iptables_filter {
40af93c4 3506 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion) = @_;
085fd492 3507
3fa83edf
DM		 3508 my $ruleset = {};
3509
dec84fcd
DM		 3510 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3511 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 3512
fadb13dd 3513 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 3514
8b27beb9 3515 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 3516
88733a74
AD		 3517 # fixme: what log level should we use here?
3518 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3519
b409c8a8
TL		 3520 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3521 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
88733a74 3522
e2943485 3523 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
88c26d5e 3524 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
e2943485 3525
1e9c5070 3526 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
e2943485
DM		 3527
3528 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
1e9c5070 3529 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
e2943485 3530
db8a955f 3531 generate_std_chains($ruleset, $hostfw_options, $ipversion);
fadb13dd 3532
6d2ab017 3533 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 3534
35d1d6da 3535 if ($hostfw_enable) {
aedde2c2 3536 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
1a9978ed
DM		 3537 warn $@ if $@; # just to be sure - should not happen
3538 }
3fa83edf 3539
6158271d 3540 # generate firewall rules for QEMU VMs
0a0ba19e 3541 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
1a9978ed
DM		 3542 eval {
3543 my $conf = $vmdata->{qemu}->{$vmid};
3544 my $vmfw_conf = $vmfw_configs->{$vmid};
3545 return if !$vmfw_conf;
1a9978ed 3546
0a0ba19e 3547 foreach my $netid (sort keys %$conf) {
1a9978ed
DM		 3548 next if $netid !~ m/^net(\d+)$/;
3549 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3550 next if !$net->{firewall};
3551 my $iface = "tap${vmid}i$1";
3552
3553 my $macaddr = $net->{macaddr};
3554 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
84870b1a 3555 $vmfw_conf, $vmid, 'IN', $ipversion);
1a9978ed 3556 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
84870b1a 3557 $vmfw_conf, $vmid, 'OUT', $ipversion);
1a9978ed
DM		 3558 }
3559 };
3560 warn $@ if $@; # just to be sure - should not happen
3fa83edf 3561 }
c8301d63 3562
3b4882dc 3563 # generate firewall rules for LXC containers
0a0ba19e 3564 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3b4882dc
AG		 3565 eval {
3566 my $conf = $vmdata->{lxc}->{$vmid};
3567 my $vmfw_conf = $vmfw_configs->{$vmid};
3568 return if !$vmfw_conf;
3569
3b4882dc 3570 if ($vmfw_conf->{options}->{enable}) {
0a0ba19e 3571 foreach my $netid (sort keys %$conf) {
3b4882dc 3572 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3573 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3b4882dc
AG		 3574 next if !$net->{firewall};
3575 my $iface = "veth${vmid}i$1";
3576 my $macaddr = $net->{hwaddr};
3577 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3578 $vmfw_conf, $vmid, 'IN', $ipversion);
3579 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3580 $vmfw_conf, $vmid, 'OUT', $ipversion);
3581 }
3582 }
3583 };
3584 warn $@ if $@; # just to be sure - should not happen
3585 }
3586
097820b0 3587 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
1e9c5070 3588 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
097820b0
AD		 3589 }
3590
147dd882
WB		 3591 return $ruleset;
3592}
3593
ebf72e49
WB		 3594sub mac_to_linklocal {
3595 my ($macaddr) = @_;
3596 my @parts = split(/:/, $macaddr);
3597 # The standard link local address uses the fe80::/64 prefix with the
3598 # modified EUI-64 identifier derived from the MAC address by flipping the
3599 # universal/local bit and inserting FF:FE in the middle.
3600 # See RFC 4291.
3601 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3602 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3603 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3604}
3605
147dd882
WB		 3606sub compile_ipsets {
3607 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3608
3609 my $localnet;
3610 if ($cluster_conf->{aliases}->{local_network}) {
3611 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3612 } else {
3613 my $localnet_ver;
3614 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3615
3616 $cluster_conf->{aliases}->{local_network} = {
3617 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3618 }
3619
3620 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3621
3622
3623 my $ipset_ruleset = {};
3624
3625 # generate ipsets for QEMU VMs
3626 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3627 eval {
3628 my $conf = $vmdata->{qemu}->{$vmid};
3629 my $vmfw_conf = $vmfw_configs->{$vmid};
3630 return if !$vmfw_conf;
3631
74601077
WB		 3632 # When the 'ipfilter' option is enabled every device for which there
3633 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3634 # ipset.
3635 # The reason is that ipfilter ipsets are always filled with standard
3636 # IPv6 link-local filters.
3637 my $ipsets = $vmfw_conf->{ipset};
3638 my $implicit_sets = {};
3639
ebf72e49
WB		 3640 my $device_ips = {};
3641 foreach my $netid (keys %$conf) {
3642 next if $netid !~ m/^net(\d+)$/;
3643 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3644 next if !$net->{firewall};
3645
74601077
WB		 3646 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3647 $implicit_sets->{"ipfilter-$netid"} = [];
3648 }
3649
ebf72e49
WB		 3650 my $macaddr = $net->{macaddr};
3651 my $linklocal = mac_to_linklocal($macaddr);
3652 $device_ips->{$netid} = [
3653 { cidr => $linklocal },
3654 { cidr => 'fe80::/10', nomatch => 1 }
3655 ];
3656 }
3657
74601077
WB		 3658 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3659 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
147dd882
WB		 3660 };
3661 warn $@ if $@; # just to be sure - should not happen
3662 }
3663
3664 # generate firewall rules for LXC containers
3665 foreach my $vmid (keys %{$vmdata->{lxc}}) {
aa229652
WB		 3666 eval {
3667 my $conf = $vmdata->{lxc}->{$vmid};
3668 my $vmfw_conf = $vmfw_configs->{$vmid};
3669 return if !$vmfw_conf;
147dd882 3670
74601077
WB		 3671 # When the 'ipfilter' option is enabled every device for which there
3672 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3673 # ipset.
3674 # The reason is that ipfilter ipsets are always filled with standard
383fe679
WB		 3675 # IPv6 link-local filters, as well as the IP addresses configured
3676 # for the container.
74601077
WB		 3677 my $ipsets = $vmfw_conf->{ipset};
3678 my $implicit_sets = {};
3679
ebf72e49
WB		 3680 my $device_ips = {};
3681 foreach my $netid (keys %$conf) {
3682 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3683 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
ebf72e49
WB		 3684 next if !$net->{firewall};
3685
74601077
WB		 3686 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3687 $implicit_sets->{"ipfilter-$netid"} = [];
3688 }
3689
ebf72e49
WB		 3690 my $macaddr = $net->{hwaddr};
3691 my $linklocal = mac_to_linklocal($macaddr);
383fe679 3692 my $set = $device_ips->{$netid} = [
ebf72e49
WB		 3693 { cidr => $linklocal },
3694 { cidr => 'fe80::/10', nomatch => 1 }
3695 ];
37ef1ce1 3696 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
383fe679
WB		 3697 push @$set, { cidr => $1 };
3698 }
37ef1ce1 3699 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
383fe679
WB		 3700 push @$set, { cidr => $1 };
3701 }
ebf72e49
WB		 3702 }
3703
74601077
WB		 3704 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3705 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
aa229652
WB		 3706 };
3707 warn $@ if $@; # just to be sure - should not happen
147dd882
WB		 3708 }
3709
74601077 3710 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
27083984 3711
147dd882 3712 return $ipset_ruleset;
3fa83edf
DM		 3713}
3714
c5e8b008 3715sub compile_ebtables_filter {
40af93c4 3716 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
c5e8b008 3717
2549e7ef 3718 if (!($cluster_conf->{options}->{ebtables} // 1)) {
84025e99
SI		 3719 return {};
3720 }
c5e8b008
AD		 3721
3722 my $ruleset = {};
3723
3724 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3725
c5e8b008
AD		 3726 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3727 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3728 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3729 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3730 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3731
3732 # generate firewall rules for QEMU VMs
2e30c5c7 3733 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
c5e8b008
AD		 3734 eval {
3735 my $conf = $vmdata->{qemu}->{$vmid};
3736 my $vmfw_conf = $vmfw_configs->{$vmid};
3737 return if !$vmfw_conf;
401c141b 3738 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3739
4a1072dd 3740 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3741 next if $netid !~ m/^net(\d+)$/;
3742 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3743 next if !$net->{firewall};
3744 my $iface = "tap${vmid}i$1";
3745 my $macaddr = $net->{macaddr};
401c141b
AD		 3746 my $arpfilter = [];
3747 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3748 foreach my $ipaddr (@$ipset) {
3749 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3750 next if !$ip || ($version && $version != 4);
3751 push(@$arpfilter, $ip);
3752 }
3753 }
3754 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3755 }
3756 };
3757 warn $@ if $@; # just to be sure - should not happen
3758 }
3759
3760 # generate firewall rules for LXC containers
2e30c5c7 3761 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
c5e8b008
AD		 3762 eval {
3763 my $conf = $vmdata->{lxc}->{$vmid};
3764
3765 my $vmfw_conf = $vmfw_configs->{$vmid};
3766 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
401c141b 3767 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3768
4a1072dd 3769 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3770 next if $netid !~ m/^net(\d+)$/;
3771 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3772 next if !$net->{firewall};
3773 my $iface = "veth${vmid}i$1";
3774 my $macaddr = $net->{hwaddr};
401c141b
AD		 3775 my $arpfilter = [];
3776 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3777 foreach my $ipaddr (@$ipset) {
3778 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3779 next if !$ip || ($version && $version != 4);
3780 push(@$arpfilter, $ip);
3781 }
3782 }
3783 push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
3784 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3785 }
3786 };
3787 warn $@ if $@; # just to be sure - should not happen
3788 }
3789
3790 return $ruleset;
3791}
3792
3793sub generate_tap_layer2filter {
401c141b 3794 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
c5e8b008
AD		 3795 my $options = $vmfw_conf->{options};
3796
3797 my $tapchain = $iface."-OUT";
3798
3799 # ebtables remove zeros from mac pairs
3800 $macaddr =~ s/0([0-9a-f])/$1/ig;
3801 $macaddr = lc($macaddr);
3802
3803 ruleset_create_chain($ruleset, $tapchain);
3804
3805 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3806 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3807 }
3808
401c141b
AD		 3809 if (@$arpfilter){
3810 my $arpchain = $tapchain."-ARP";
3811 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3812 ruleset_create_chain($ruleset, $arpchain);
3813
3814 foreach my $ip (@{$arpfilter}) {
3815 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3816 }
3817 ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3818 }
3819
c5e8b008 3820 if (defined($options->{layer2_protocols})){
33efd363
AD		 3821 my $protochain = $tapchain."-PROTO";
3822 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3823 ruleset_create_chain($ruleset, $protochain);
3824
c5e8b008 3825 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
33efd363 3826 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
c5e8b008 3827 }
33efd363 3828 ruleset_addrule($ruleset, $protochain, '', '-j DROP');
c5e8b008
AD		 3829 }
3830
33efd363
AD		 3831 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3832
c5e8b008
AD		 3833 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3834}
3835
84025e99
SI		 3836# the parameter $change_only_regex changes two things if defined:
3837# * all chains not matching it will be left intact
3838# * both the $active_chains hash and the returned status_hash have different
3839# structure (they contain a key named 'rules').
3fa83edf 3840sub get_ruleset_status {
40af93c4 3841 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3fa83edf
DM		 3842
3843 my $statushash = {};
3844
3845 foreach my $chain (sort keys %$ruleset) {
84025e99
SI		 3846 my $rules = $ruleset->{$chain};
3847 my $sig = &$digest_fn($rules);
3848 my $oldsig;
9bf7d929 3849
3fa83edf 3850 $statushash->{$chain}->{sig} = $sig;
84025e99
SI		 3851 if (defined($change_only_regex)) {
3852 $oldsig = $active_chains->{$chain}->{sig};
3853 $statushash->{$chain}->{rules} = $rules;
3854 } else {
3855 $oldsig = $active_chains->{$chain};
3856 }
3fa83edf
DM		 3857 if (!defined($oldsig)) {
3858 $statushash->{$chain}->{action} = 'create';
3859 } else {
3860 if ($oldsig eq $sig) {
3861 $statushash->{$chain}->{action} = 'exists';
3862 } else {
3863 $statushash->{$chain}->{action} = 'update';
3864 }
3865 }
84025e99
SI		 3866 if ($verbose) {
3867 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3868 foreach my $cmd (@{$rules}) {
3869 print "\t$cmd\n";
3870 }
3fa83edf
DM		 3871 }
3872 }
3873
3874 foreach my $chain (sort keys %$active_chains) {
84025e99
SI		 3875 next if defined($ruleset->{$chain});
3876 my $action = 'delete';
d9551052 3877 my $sig = $active_chains->{$chain};
84025e99
SI		 3878 if (defined($change_only_regex)) {
3879 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3880 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
d9551052 3881 $sig = $sig->{sig};
84025e99 3882 }
84025e99
SI		 3883 $statushash->{$chain}->{action} = $action;
3884 $statushash->{$chain}->{sig} = $sig;
3885 print "$action $chain ($sig)\n" if $verbose;
6158271d 3886 }
2a052ee3 3887
3fa83edf
DM		 3888 return $statushash;
3889}
3890
3fa83edf
DM		 3891sub print_sig_rule {
3892 my ($chain, $sig) = @_;
3893
09d5f68e
DM		 3894 # We just use this to store a SHA1 checksum used to detect changes
3895 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 3896}
3897
df7cb349 3898sub get_ruleset_cmdlist {
40af93c4 3899 my ($ruleset, $iptablescmd) = @_;
3fa83edf 3900
3fa83edf 3901 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 3902
17da5c0f 3903 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
40af93c4 3904 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 3905
3906 # create missing chains first
3907 foreach my $chain (sort keys %$ruleset) {
3908 my $stat = $statushash->{$chain};
3909 die "internal error" if !$stat;
3910 next if $stat->{action} ne 'create';
886aba9c 3911
3fa83edf
DM		 3912 $cmdlist .= ":$chain - [0:0]\n";
3913 }
3914
4bd0a9c4 3915 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
55fad3b7
DM		 3916 my $chain = "PVEFW-$h";
3917 if ($ruleset->{$chain} && !$hooks->{$h}) {
3918 $cmdlist .= "-A $h -j $chain\n";
4bd0a9c4 3919 }
3fa83edf
DM		 3920 }
3921
3922 foreach my $chain (sort keys %$ruleset) {
3923 my $stat = $statushash->{$chain};
3924 die "internal error" if !$stat;
3925
3926 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3927 $cmdlist .= "-F $chain\n";
3928 foreach my $cmd (@{$ruleset->{$chain}}) {
3929 $cmdlist .= "$cmd\n";
3930 }
3931 $cmdlist .= print_sig_rule($chain, $stat->{sig});
3932 } elsif ($stat->{action} eq 'delete') {
f5d28682 3933 die "internal error"; # this should not happen
3fa83edf
DM		 3934 } elsif ($stat->{action} eq 'exists') {
3935 # do nothing
3936 } else {
3937 die "internal error - unknown status '$stat->{action}'";
3938 }
3939 }
3940
f5d28682
DM		 3941 foreach my $chain (keys %$statushash) {
3942 next if $statushash->{$chain}->{action} ne 'delete';
3943 $cmdlist .= "-F $chain\n";
3944 }
3945 foreach my $chain (keys %$statushash) {
3946 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 3947 next if $chain eq 'PVEFW-INPUT';
3948 next if $chain eq 'PVEFW-OUTPUT';
3949 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 3950 $cmdlist .= "-X $chain\n";
3951 }
3952
3f95d14a 3953 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 3954
3fa83edf
DM		 3955 $cmdlist .= "COMMIT\n";
3956
3f95d14a 3957 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 3958}
3959
d4a23c88 3960my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
84025e99 3961
151c209e 3962sub get_ebtables_cmdlist {
40af93c4 3963 my ($ruleset) = @_;
151c209e
AD		 3964
3965 my $changes = 0;
3966 my $cmdlist = "*filter\n";
3967
84025e99
SI		 3968 my $active_chains = ebtables_get_chains();
3969 my $statushash = get_ruleset_status($ruleset, $active_chains,
40af93c4 3970 \&iptables_chain_digest,
84025e99 3971 $pve_ebtables_chainname_regex);
151c209e 3972
84025e99
SI		 3973 # create chains first and make sure PVE rules are evaluated if active
3974 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3975 my $pve_include = 0;
3976 foreach my $chain (sort keys %$statushash) {
3977 next if ($statushash->{$chain}->{action} eq 'delete');
151c209e 3978 $cmdlist .= ":$chain ACCEPT\n";
84025e99 3979 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
151c209e
AD		 3980 }
3981
84025e99 3982 foreach my $chain (sort keys %$statushash) {
151c209e 3983 my $stat = $statushash->{$chain};
84025e99
SI		 3984 next if ($stat->{action} eq 'delete');
3985 $changes = 1 if ($stat->{action} !~ 'ignore|exists');
151c209e 3986
84025e99
SI		 3987 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3988 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3989 next if ! $pve_include;
3990 $pve_include = 0;
3991 }
151c209e
AD		 3992 $cmdlist .= "$cmd\n";
3993 }
3994 }
84025e99 3995 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
151c209e
AD		 3996
3997 return wantarray ? ($cmdlist, $changes) : $cmdlist;
3998}
3999
34cdedfa 4000sub get_ipset_cmdlist {
40af93c4 4001 my ($ruleset) = @_;
34cdedfa
AD		 4002
4003 my $cmdlist = "";
4004
dd7a13fd
DM		 4005 my $delete_cmdlist = "";
4006
4bd0a9c4 4007 my $active_chains = ipset_get_chains();
40af93c4 4008 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
34cdedfa 4009
e34d0e58 4010 # remove stale _swap chains
30f1b100
DM		 4011 foreach my $chain (keys %$active_chains) {
4012 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4013 $cmdlist .= "destroy $chain\n";
4014 }
4015 }
4016
c69cf614 4017 foreach my $chain (keys %$ruleset) {
c69cf614
DM		 4018 my $stat = $statushash->{$chain};
4019 die "internal error" if !$stat;
4020
4021 if ($stat->{action} eq 'create') {
4022 foreach my $cmd (@{$ruleset->{$chain}}) {
4023 $cmdlist .= "$cmd\n";
4024 }
4025 }
4026 }
4027
4028 foreach my $chain (keys %$ruleset) {
6d959e3f
DM		 4029 my $stat = $statushash->{$chain};
4030 die "internal error" if !$stat;
34cdedfa 4031
dd7a13fd
DM		 4032 if ($stat->{action} eq 'update') {
4033 my $chain_swap = $chain."_swap";
cbb5d6f3 4034
dd7a13fd
DM		 4035 foreach my $cmd (@{$ruleset->{$chain}}) {
4036 $cmd =~ s/$chain/$chain_swap/;
4037 $cmdlist .= "$cmd\n";
34cdedfa 4038 }
dd7a13fd
DM		 4039 $cmdlist .= "swap $chain_swap $chain\n";
4040 $cmdlist .= "flush $chain_swap\n";
4041 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 4042 }
dd7a13fd 4043 }
3f95d14a 4044
88c26d5e 4045 # the remove unused chains
c69cf614 4046 foreach my $chain (keys %$statushash) {
dd7a13fd 4047 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 4048
dd7a13fd
DM		 4049 $delete_cmdlist .= "flush $chain\n";
4050 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 4051 }
4052
dd7a13fd 4053 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 4054
dd7a13fd 4055 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 4056}
4057
6b9f68a2 4058sub apply_ruleset {
40af93c4 4059 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
6b9f68a2
DM		 4060
4061 enable_bridge_firewall();
4062
cbb5d6f3 4063 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
40af93c4 4064 get_ipset_cmdlist($ipset_ruleset);
6b9f68a2 4065
40af93c4
TL		 4066 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4067 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4068 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
2a052ee3 4069
81a0bf43
DM		 4070 if ($verbose) {
4071 if ($ipset_changes) {
4072 print "ipset changes:\n";
4073 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4074 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4075 }
3f95d14a 4076
81a0bf43
DM		 4077 if ($changes) {
4078 print "iptables changes:\n";
4079 print $cmdlist;
4080 }
17da5c0f
AD		 4081
4082 if ($changesv6) {
4083 print "ip6tables changes:\n";
4084 print $cmdlistv6;
4085 }
151c209e
AD		 4086
4087 if ($ebtables_changes) {
4088 print "ebtables changes:\n";
4089 print $ebtables_cmdlist;
4090 }
81a0bf43 4091 }
3fa83edf 4092
259db1e6
DM		 4093 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4094 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4095
2a052ee3 4096 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 4097
259db1e6
DM		 4098 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4099 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4100
3fa83edf 4101 iptables_restore_cmdlist($cmdlist);
259db1e6
DM		 4102
4103 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4104 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4105
17da5c0f 4106 ip6tables_restore_cmdlist($cmdlistv6);
3fa83edf 4107
259db1e6
DM		 4108 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4109 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4110
dd7a13fd 4111 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 4112
151c209e
AD		 4113 ebtables_restore_cmdlist($ebtables_cmdlist);
4114
4115 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4116 PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4117
6158271d 4118 # test: re-read status and check if everything is up to date
4bd0a9c4 4119 my $active_chains = iptables_get_chains();
40af93c4 4120 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 4121
4122 my $errors;
4123 foreach my $chain (sort keys %$ruleset) {
4124 my $stat = $statushash->{$chain};
4125 if ($stat->{action} ne 'exists') {
4126 warn "unable to update chain '$chain'\n";
4127 $errors = 1;
4128 }
4129 }
b6360c3f 4130
17da5c0f 4131 my $active_chainsv6 = iptables_get_chains("ip6tables");
40af93c4 4132 my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
17da5c0f
AD		 4133
4134 foreach my $chain (sort keys %$rulesetv6) {
4135 my $stat = $statushashv6->{$chain};
4136 if ($stat->{action} ne 'exists') {
4137 warn "unable to update chain '$chain'\n";
4138 $errors = 1;
4139 }
4140 }
4141
151c209e 4142 my $active_ebtables_chains = ebtables_get_chains();
84025e99
SI		 4143 my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4144 $active_ebtables_chains, \&iptables_chain_digest,
40af93c4 4145 $pve_ebtables_chainname_regex);
151c209e
AD		 4146
4147 foreach my $chain (sort keys %$ebtables_ruleset) {
4148 my $stat = $ebtables_statushash->{$chain};
4149 if ($stat->{action} ne 'exists') {
4150 warn "ebtables : unable to update chain '$chain'\n";
4151 $errors = 1;
4152 }
4153 }
4154
3fa83edf 4155 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 4156
4157 update_nf_conntrack_max($hostfw_conf);
4158
4159 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4160
6c27f4f3 4161 update_nf_conntrack_logging($hostfw_conf);
b6360c3f
DM		 4162}
4163
490cdead
DM		 4164sub update_nf_conntrack_max {
4165 my ($hostfw_conf) = @_;
4166
4167 my $max = 65536; # reasonable default
4168
4169 my $options = $hostfw_conf->{options} || {};
4170
4171 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4172 $max = $options->{nf_conntrack_max};
4173 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4174 }
4175
4176 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4177 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4178
4179 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4180
4181 if ($current != $max) {
4182 my $hashsize = int($max/4);
4183 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4184 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4185 }
4186}
4187
28c082a1
AD		 4188sub update_nf_conntrack_tcp_timeout_established {
4189 my ($hostfw_conf) = @_;
4190
4191 my $options = $hostfw_conf->{options} || {};
4192
4193 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4194
4195 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4196}
4197
6c27f4f3
DL		 4198my $log_nf_conntrack_enabled = undef;
4199sub update_nf_conntrack_logging {
4200 my ($hostfw_conf) = @_;
4201
4202 my $options = $hostfw_conf->{options} || {};
4203 my $value = $options->{log_nf_conntrack} || 0;
4204 if (!defined($log_nf_conntrack_enabled)
4205 || $value != $log_nf_conntrack_enabled)
4206 {
4207 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4208 PVE::Tools::file_set_contents($tmpfile, $value);
4209
4210 PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4211 $log_nf_conntrack_enabled = $value;
4212 }
4213}
4214
c4a2e5ae
DM		 4215sub remove_pvefw_chains {
4216
7b7b2654
AD		 4217 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4218 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4219 PVE::Firewall::remove_pvefw_chains_ipset();
4220
4221}
4222
4223sub remove_pvefw_chains_iptables {
4224 my ($iptablescmd) = @_;
4225
4226 my ($chash, $hooks) = iptables_get_chains($iptablescmd);
c4a2e5ae
DM		 4227 my $cmdlist = "*filter\n";
4228
4229 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4230 if ($hooks->{$h}) {
4231 $cmdlist .= "-D $h -j PVEFW-$h\n";
4232 }
4233 }
cbb5d6f3 4234
c4a2e5ae
DM		 4235 foreach my $chain (keys %$chash) {
4236 $cmdlist .= "-F $chain\n";
4237 }
4238
4239 foreach my $chain (keys %$chash) {
4240 $cmdlist .= "-X $chain\n";
4241 }
4242 $cmdlist .= "COMMIT\n";
4243
7b7b2654
AD		 4244 if($iptablescmd eq "ip6tables") {
4245 ip6tables_restore_cmdlist($cmdlist);
4246 } else {
4247 iptables_restore_cmdlist($cmdlist);
4248 }
4249}
4250
4251sub remove_pvefw_chains_ipset {
55fad3b7
DM		 4252
4253 my $ipset_chains = ipset_get_chains();
4254
7b7b2654 4255 my $cmdlist = "";
55fad3b7
DM		 4256
4257 foreach my $chain (keys %$ipset_chains) {
88c26d5e
DM		 4258 $cmdlist .= "flush $chain\n";
4259 $cmdlist .= "destroy $chain\n";
55fad3b7
DM		 4260 }
4261
7b7b2654 4262 ipset_restore_cmdlist($cmdlist) if $cmdlist;
c4a2e5ae
DM		 4263}
4264
8b453a09
DM		 4265sub init {
4266 my $cluster_conf = load_clusterfw_conf();
4267 my $cluster_options = $cluster_conf->{options};
4268 my $enable = $cluster_options->{enable};
4269
4270 return if !$enable;
4271
4272 # load required modules here
4273}
4274
6b9f68a2 4275sub update {
6b9f68a2 4276 my $code = sub {
3dfa8a7f
DM		 4277
4278 my $cluster_conf = load_clusterfw_conf();
4279 my $cluster_options = $cluster_conf->{options};
4280
55fad3b7 4281 if (!$cluster_options->{enable}) {
b22130d3 4282 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 4283 return;
4284 }
4285
50f9a28d 4286 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3dfa8a7f 4287
c5e8b008 4288 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
490cdead 4289
151c209e 4290 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
6b9f68a2
DM		 4291 };
4292
4293 run_locked($code);
4294}
4295
b6360c3f 42961;
Firewall test scripts