src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'Trcrt' => [
 141         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 143     ],
 144  };
 145
 146 # imported/converted from: /usr/share/shorewall/macro.*
 147 my $pve_fw_macros = {
 148     'Amanda' => [
 149         "Amanda Backup",
 150         { action => 'PARAM', proto => 'udp', dport => '10080' },
 151         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 152     ],
 153     'Auth' => [
 154         "Auth (identd) traffic",
 155         { action => 'PARAM', proto => 'tcp', dport => '113' },
 156     ],
 157     'BGP' => [
 158         "Border Gateway Protocol traffic",
 159         { action => 'PARAM', proto => 'tcp', dport => '179' },
 160     ],
 161     'BitTorrent' => [
 162         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 163         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 164         { action => 'PARAM', proto => 'udp', dport => '6881' },
 165     ],
 166     'BitTorrent32' => [
 167         "BitTorrent traffic for BitTorrent 3.2 and later",
 168         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 169         { action => 'PARAM', proto => 'udp', dport => '6881' },
 170     ],
 171     'CVS' => [
 172         "Concurrent Versions System pserver traffic",
 173         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 174     ],
 175     'Citrix' => [
 176         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 177         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 178         { action => 'PARAM', proto => 'udp', dport => '1604' },
 179         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 180     ],
 181     'DAAP' => [
 182         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 183         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 184         { action => 'PARAM', proto => 'udp', dport => '3689' },
 185     ],
 186     'DCC' => [
 187         "Distributed Checksum Clearinghouse spam filtering mechanism",
 188         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 189     ],
 190     'DHCPfwd' => [
 191         "Forwarded DHCP traffic",
 192         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 193     ],
 194     'DNS' => [
 195         "Domain Name System traffic (upd and tcp)",
 196         { action => 'PARAM', proto => 'udp', dport => '53' },
 197         { action => 'PARAM', proto => 'tcp', dport => '53' },
 198     ],
 199     'Distcc' => [
 200         "Distributed Compiler service",
 201         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 202     ],
 203     'FTP' => [
 204         "File Transfer Protocol",
 205         { action => 'PARAM', proto => 'tcp', dport => '21' },
 206     ],
 207     'Finger' => [
 208         "Finger protocol (RFC 742)",
 209         { action => 'PARAM', proto => 'tcp', dport => '79' },
 210     ],
 211     'GNUnet' => [
 212         "GNUnet secure peer-to-peer networking traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 214         { action => 'PARAM', proto => 'udp', dport => '2086' },
 215         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 216         { action => 'PARAM', proto => 'udp', dport => '1080' },
 217     ],
 218     'GRE' => [
 219         "Generic Routing Encapsulation tunneling protocol",
 220         { action => 'PARAM', proto => '47' },
 221     ],
 222     'Git' => [
 223         "Git distributed revision control traffic",
 224         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 225     ],
 226     'HKP' => [
 227         "OpenPGP HTTP keyserver protocol traffic",
 228         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 229     ],
 230     'HTTP' => [
 231         "Hypertext Transfer Protocol (WWW)",
 232         { action => 'PARAM', proto => 'tcp', dport => '80' },
 233     ],
 234     'HTTPS' => [
 235         "Hypertext Transfer Protocol (WWW) over SSL",
 236         { action => 'PARAM', proto => 'tcp', dport => '443' },
 237     ],
 238     'ICPV2' => [
 239         "Internet Cache Protocol V2 (Squid) traffic",
 240         { action => 'PARAM', proto => 'udp', dport => '3130' },
 241     ],
 242     'ICQ' => [
 243         "AOL Instant Messenger traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 245     ],
 246     'IMAP' => [
 247         "Internet Message Access Protocol",
 248         { action => 'PARAM', proto => 'tcp', dport => '143' },
 249     ],
 250     'IMAPS' => [
 251         "Internet Message Access Protocol over SSL",
 252         { action => 'PARAM', proto => 'tcp', dport => '993' },
 253     ],
 254     'IPIP' => [
 255         "IPIP capsulation traffic",
 256         { action => 'PARAM', proto => '94' },
 257     ],
 258     'IPsec' => [
 259         "IPsec traffic",
 260         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 261         { action => 'PARAM', proto => '50' },
 262     ],
 263     'IPsecah' => [
 264         "IPsec authentication (AH) traffic",
 265         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 266         { action => 'PARAM', proto => '51' },
 267     ],
 268     'IPsecnat' => [
 269         "IPsec traffic and Nat-Traversal",
 270         { action => 'PARAM', proto => 'udp', dport => '500' },
 271         { action => 'PARAM', proto => 'udp', dport => '4500' },
 272         { action => 'PARAM', proto => '50' },
 273     ],
 274     'IRC' => [
 275         "Internet Relay Chat traffic",
 276         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 277     ],
 278     'Jetdirect' => [
 279         "HP Jetdirect printing",
 280         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 281     ],
 282     'L2TP' => [
 283         "Layer 2 Tunneling Protocol traffic",
 284         { action => 'PARAM', proto => 'udp', dport => '1701' },
 285     ],
 286     'LDAP' => [
 287         "Lightweight Directory Access Protocol traffic",
 288         { action => 'PARAM', proto => 'tcp', dport => '389' },
 289     ],
 290     'LDAPS' => [
 291         "Secure Lightweight Directory Access Protocol traffic",
 292         { action => 'PARAM', proto => 'tcp', dport => '636' },
 293     ],
 294     'MSNP' => [
 295         "Microsoft Notification Protocol",
 296         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 297     ],
 298     'MSSQL' => [
 299         "Microsoft SQL Server",
 300         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 301     ],
 302     'Mail' => [
 303         "Mail traffic (SMTP, SMTPS, Submission)",
 304         { action => 'PARAM', proto => 'tcp', dport => '25' },
 305         { action => 'PARAM', proto => 'tcp', dport => '465' },
 306         { action => 'PARAM', proto => 'tcp', dport => '587' },
 307     ],
 308     'Munin' => [
 309         "Munin networked resource monitoring traffic",
 310         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 311     ],
 312     'MySQL' => [
 313         "MySQL server",
 314         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 315     ],
 316     'NNTP' => [
 317         "NNTP traffic (Usenet).",
 318         { action => 'PARAM', proto => 'tcp', dport => '119' },
 319     ],
 320     'NNTPS' => [
 321         "Encrypted NNTP traffic (Usenet)",
 322         { action => 'PARAM', proto => 'tcp', dport => '563' },
 323     ],
 324     'NTP' => [
 325         "Network Time Protocol (ntpd)",
 326         { action => 'PARAM', proto => 'udp', dport => '123' },
 327     ],
 328     'OSPF' => [
 329         "OSPF multicast traffic",
 330         { action => 'PARAM', proto => '89' },
 331     ],
 332     'OpenVPN' => [
 333         "OpenVPN traffic",
 334         { action => 'PARAM', proto => 'udp', dport => '1194' },
 335     ],
 336     'PCA' => [
 337         "Symantec PCAnywere (tm)",
 338         { action => 'PARAM', proto => 'udp', dport => '5632' },
 339         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 340     ],
 341     'POP3' => [
 342         "POP3 traffic",
 343         { action => 'PARAM', proto => 'tcp', dport => '110' },
 344     ],
 345     'POP3S' => [
 346         "Encrypted POP3 traffic",
 347         { action => 'PARAM', proto => 'tcp', dport => '995' },
 348     ],
 349     'PPtP' => [
 350         "Point-to-Point Tunneling Protocol",
 351         { action => 'PARAM', proto => '47' },
 352         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 353     ],
 354     'Ping' => [
 355         "ICMP echo request",
 356         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 357     ],
 358     'PostgreSQL' => [
 359         "PostgreSQL server",
 360         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 361     ],
 362     'Printer' => [
 363         "Line Printer protocol printing",
 364         { action => 'PARAM', proto => 'tcp', dport => '515' },
 365     ],
 366     'RDP' => [
 367         "Microsoft Remote Desktop Protocol traffic",
 368         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 369     ],
 370     'RIP' => [
 371         "Routing Information Protocol (bidirectional)",
 372         { action => 'PARAM', proto => 'udp', dport => '520' },
 373     ],
 374     'RNDC' => [
 375         "BIND remote management protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '953' },
 377     ],
 378     'Razor' => [
 379         "Razor Antispam System",
 380         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 381     ],
 382     'Rdate' => [
 383         "Remote time retrieval (rdate)",
 384         { action => 'PARAM', proto => 'tcp', dport => '37' },
 385     ],
 386     'Rsync' => [
 387         "Rsync server",
 388         { action => 'PARAM', proto => 'tcp', dport => '873' },
 389     ],
 390     'SANE' => [
 391         "SANE network scanning",
 392         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 393     ],
 394     'SMB' => [
 395         "Microsoft SMB traffic",
 396         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 397         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 398         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 399         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 400     ],
 401     'SMBswat' => [
 402         "Samba Web Administration Tool",
 403         { action => 'PARAM', proto => 'tcp', dport => '901' },
 404     ],
 405     'SMTP' => [
 406         "Simple Mail Transfer Protocol",
 407         { action => 'PARAM', proto => 'tcp', dport => '25' },
 408     ],
 409     'SMTPS' => [
 410         "Encrypted Simple Mail Transfer Protocol",
 411         { action => 'PARAM', proto => 'tcp', dport => '465' },
 412     ],
 413     'SNMP' => [
 414         "Simple Network Management Protocol",
 415         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 416         { action => 'PARAM', proto => 'tcp', dport => '161' },
 417     ],
 418     'SPAMD' => [
 419         "Spam Assassin SPAMD traffic",
 420         { action => 'PARAM', proto => 'tcp', dport => '783' },
 421     ],
 422     'SSH' => [
 423         "Secure shell traffic",
 424         { action => 'PARAM', proto => 'tcp', dport => '22' },
 425     ],
 426     'SVN' => [
 427         "Subversion server (svnserve)",
 428         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 429     ],
 430     'SixXS' => [
 431         "SixXS IPv6 Deployment and Tunnel Broker",
 432         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 433         { action => 'PARAM', proto => 'udp', dport => '3740' },
 434         { action => 'PARAM', proto => '41' },
 435         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 436     ],
 437     'Squid' => [
 438         "Squid web proxy traffic",
 439         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 440     ],
 441     'Submission' => [
 442         "Mail message submission traffic",
 443         { action => 'PARAM', proto => 'tcp', dport => '587' },
 444     ],
 445     'Syslog' => [
 446         "Syslog protocol (RFC 5424) traffic",
 447         { action => 'PARAM', proto => 'udp', dport => '514' },
 448         { action => 'PARAM', proto => 'tcp', dport => '514' },
 449     ],
 450     'TFTP' => [
 451         "Trivial File Transfer Protocol traffic",
 452         { action => 'PARAM', proto => 'udp', dport => '69' },
 453     ],
 454     'Telnet' => [
 455         "Telnet traffic",
 456         { action => 'PARAM', proto => 'tcp', dport => '23' },
 457     ],
 458     'Telnets' => [
 459         "Telnet over SSL",
 460         { action => 'PARAM', proto => 'tcp', dport => '992' },
 461     ],
 462     'Time' => [
 463         "RFC 868 Time protocol",
 464         { action => 'PARAM', proto => 'tcp', dport => '37' },
 465     ],
 466     'Trcrt' => [
 467         "Traceroute (for up to 30 hops) traffic",
 468         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 469         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 470     ],
 471     'VNC' => [
 472         "VNC traffic for VNC display's 0 - 99",
 473         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 474     ],
 475     'VNCL' => [
 476         "VNC traffic from Vncservers to Vncviewers in listen mode",
 477         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 478     ],
 479     'Web' => [
 480         "WWW traffic (HTTP and HTTPS)",
 481         { action => 'PARAM', proto => 'tcp', dport => '80' },
 482         { action => 'PARAM', proto => 'tcp', dport => '443' },
 483     ],
 484     'Webcache' => [
 485         "Web Cache/Proxy traffic (port 8080)",
 486         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 487     ],
 488     'Webmin' => [
 489         "Webmin traffic",
 490         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 491     ],
 492     'Whois' => [
 493         "Whois (nicname, RFC 3912) traffic",
 494         { action => 'PARAM', proto => 'tcp', dport => '43' },
 495     ],
 496 };
 497
 498 my $pve_fw_parsed_macros;
 499 my $pve_fw_macro_descr;
 500 my $pve_fw_preferred_macro_names = {};
 501
 502 my $pve_std_chains = {};
 503 $pve_std_chains->{4} = {
 504     'PVEFW-SET-ACCEPT-MARK' => [
 505         "-j MARK --set-mark 1",
 506     ],
 507     'PVEFW-DropBroadcast' => [
 508         # same as shorewall 'Broadcast'
 509         # simply DROP BROADCAST/MULTICAST/ANYCAST
 510         # we can use this to reduce logging
 511         { action => 'DROP', dsttype => 'BROADCAST' },
 512         { action => 'DROP', dsttype => 'MULTICAST' },
 513         { action => 'DROP', dsttype => 'ANYCAST' },
 514         { action => 'DROP', dest => '224.0.0.0/4' },
 515     ],
 516     'PVEFW-reject' => [
 517         # same as shorewall 'reject'
 518         { action => 'DROP', dsttype => 'BROADCAST' },
 519         { action => 'DROP', source => '224.0.0.0/4' },
 520         { action => 'DROP', proto => 'icmp' },
 521         "-p tcp -j REJECT --reject-with tcp-reset",
 522         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 523         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 524         "-j REJECT --reject-with icmp-host-prohibited",
 525     ],
 526     'PVEFW-Drop' => [
 527         # same as shorewall 'Drop', which is equal to DROP,
 528         # but REJECT/DROP some packages to reduce logging,
 529         # and ACCEPT critical ICMP types
 530         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 531         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 532         { action => 'PVEFW-DropBroadcast' },
 533         # ACCEPT critical ICMP types
 534         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 535         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 536         # Drop packets with INVALID state
 537         "-m conntrack --ctstate INVALID -j DROP",
 538         # Drop Microsoft SMB noise
 539         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 540         { action => 'DROP', proto => 'udp', dport => '137:139'},
 541         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 542         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 543         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 544         # Drop new/NotSyn traffic so that it doesn't get logged
 545         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 546         # Drop DNS replies
 547         { action => 'DROP', proto => 'udp', sport => 53 },
 548     ],
 549     'PVEFW-Reject' => [
 550         # same as shorewall 'Reject', which is equal to Reject,
 551         # but REJECT/DROP some packages to reduce logging,
 552         # and ACCEPT critical ICMP types
 553         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 554         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 555         { action => 'PVEFW-DropBroadcast' },
 556         # ACCEPT critical ICMP types
 557         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 558         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 559         # Drop packets with INVALID state
 560         "-m conntrack --ctstate INVALID -j DROP",
 561         # Drop Microsoft SMB noise
 562         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 563         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 564         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 565         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 566         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 567         # Drop new/NotSyn traffic so that it doesn't get logged
 568         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 569         # Drop DNS replies
 570         { action => 'DROP', proto => 'udp', sport => 53 },
 571     ],
 572     'PVEFW-tcpflags' => [
 573         # same as shorewall tcpflags action.
 574         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 575         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 576         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 577         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 578         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 579         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 580     ],
 581     'PVEFW-smurfs' => [
 582         # same as shorewall smurfs action
 583         # Filter packets for smurfs (packets with a broadcast address as the source).
 584         "-s 0.0.0.0/32 -j RETURN",
 585         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 586         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 587     ],
 588 };
 589
 590 $pve_std_chains->{6} = {
 591     'PVEFW-SET-ACCEPT-MARK' => [
 592         "-j MARK --set-mark 1",
 593     ],
 594     'PVEFW-DropBroadcast' => [
 595         # same as shorewall 'Broadcast'
 596         # simply DROP BROADCAST/MULTICAST/ANYCAST
 597         # we can use this to reduce logging
 598         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 599         # ipv6 addrtype does not work with kernel 2.6.32
 600         #{ action => 'DROP', dsttype => 'MULTICAST' },
 601         #{ action => 'DROP', dsttype => 'ANYCAST' },
 602         { action => 'DROP', dest => 'ff00::/8' },
 603         #{ action => 'DROP', dest => '224.0.0.0/4' },
 604     ],
 605     'PVEFW-reject' => [
 606         # same as shorewall 'reject'
 607         #{ action => 'DROP', dsttype => 'BROADCAST' },
 608         #{ action => 'DROP', source => '224.0.0.0/4' },
 609         { action => 'DROP', proto => 'icmpv6' },
 610         "-p tcp -j REJECT --reject-with tcp-reset",
 611         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 612         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 613         #"-j REJECT --reject-with icmp-host-prohibited",
 614     ],
 615     'PVEFW-Drop' => [
 616         # same as shorewall 'Drop', which is equal to DROP,
 617         # but REJECT/DROP some packages to reduce logging,
 618         # and ACCEPT critical ICMP types
 619         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 620         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 621         { action => 'PVEFW-DropBroadcast' },
 622         # ACCEPT critical ICMP types
 623         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 624         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 625         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 626
 627         # Drop packets with INVALID state
 628         "-m conntrack --ctstate INVALID -j DROP",
 629         # Drop Microsoft SMB noise
 630         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 631         { action => 'DROP', proto => 'udp', dport => '137:139'},
 632         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 633         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 634         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 635         # Drop new/NotSyn traffic so that it doesn't get logged
 636         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 637         # Drop DNS replies
 638         { action => 'DROP', proto => 'udp', sport => 53 },
 639     ],
 640     'PVEFW-Reject' => [
 641         # same as shorewall 'Reject', which is equal to Reject,
 642         # but REJECT/DROP some packages to reduce logging,
 643         # and ACCEPT critical ICMP types
 644         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 645         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 646         { action => 'PVEFW-DropBroadcast' },
 647         # ACCEPT critical ICMP types
 648         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 649         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 650         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 651
 652         # Drop packets with INVALID state
 653         "-m conntrack --ctstate INVALID -j DROP",
 654         # Drop Microsoft SMB noise
 655         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 656         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 657         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 658         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 659         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 660         # Drop new/NotSyn traffic so that it doesn't get logged
 661         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 662         # Drop DNS replies
 663         { action => 'DROP', proto => 'udp', sport => 53 },
 664     ],
 665     'PVEFW-tcpflags' => [
 666         # same as shorewall tcpflags action.
 667         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 668         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 669         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 670         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 671         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 672         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 673     ],
 674 };
 675
 676 # iptables -p icmp -h
 677 my $icmp_type_names = {
 678     any => 1,
 679     'echo-reply' => 1,
 680     'destination-unreachable' => 1,
 681     'network-unreachable' => 1,
 682     'host-unreachable' => 1,
 683     'protocol-unreachable' => 1,
 684     'port-unreachable' => 1,
 685     'fragmentation-needed' => 1,
 686     'source-route-failed' => 1,
 687     'network-unknown' => 1,
 688     'host-unknown' => 1,
 689     'network-prohibited' => 1,
 690     'host-prohibited' => 1,
 691     'TOS-network-unreachable' => 1,
 692     'TOS-host-unreachable' => 1,
 693     'communication-prohibited' => 1,
 694     'host-precedence-violation' => 1,
 695     'precedence-cutoff' => 1,
 696     'source-quench' => 1,
 697     'redirect' => 1,
 698     'network-redirect' => 1,
 699     'host-redirect' => 1,
 700     'TOS-network-redirect' => 1,
 701     'TOS-host-redirect' => 1,
 702     'echo-request' => 1,
 703     'router-advertisement' => 1,
 704     'router-solicitation' => 1,
 705     'time-exceeded' => 1,
 706     'ttl-zero-during-transit' => 1,
 707     'ttl-zero-during-reassembly' => 1,
 708     'parameter-problem' => 1,
 709     'ip-header-bad' => 1,
 710     'required-option-missing' => 1,
 711     'timestamp-request' => 1,
 712     'timestamp-reply' => 1,
 713     'address-mask-request' => 1,
 714     'address-mask-reply' => 1,
 715 };
 716
 717 # ip6tables -p icmpv6 -h
 718
 719 my $icmpv6_type_names = {
 720     'any' => 1,
 721     'destination-unreachable' => 1,
 722     'no-route' => 1,
 723     'communication-prohibited' => 1,
 724     'address-unreachable' => 1,
 725     'port-unreachable' => 1,
 726     'packet-too-big' => 1,
 727     'time-exceeded' => 1,
 728     'ttl-zero-during-transit' => 1,
 729     'ttl-zero-during-reassembly' => 1,
 730     'parameter-problem' => 1,
 731     'bad-header' => 1,
 732     'unknown-header-type' => 1,
 733     'unknown-option' => 1,
 734     'echo-request' => 1,
 735     'echo-reply' => 1,
 736     'router-solicitation' => 1,
 737     'router-advertisement' => 1,
 738     'neighbour-solicitation' => 1,
 739     'neighbour-advertisement' => 1,
 740     'redirect' => 1,
 741 };
 742
 743 sub init_firewall_macros {
 744
 745     $pve_fw_parsed_macros = {};
 746
 747     foreach my $k (keys %$pve_fw_macros) {
 748         my $lc_name = lc($k);
 749         my $macro = $pve_fw_macros->{$k};
 750         if (!ref($macro->[0])) {
 751             $pve_fw_macro_descr->{$k} = shift @$macro;
 752         }
 753         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 754         $pve_fw_parsed_macros->{$k} = $macro;
 755     }
 756 }
 757
 758 init_firewall_macros();
 759
 760 sub get_macros {
 761     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 762 }
 763
 764 my $etc_services;
 765
 766 sub get_etc_services {
 767
 768     return $etc_services if $etc_services;
 769
 770     my $filename = "/etc/services";
 771
 772     my $fh = IO::File->new($filename, O_RDONLY);
 773     if (!$fh) {
 774         warn "unable to read '$filename' - $!\n";
 775         return {};
 776     }
 777
 778     my $services = {};
 779
 780     while (my $line = <$fh>) {
 781         chomp ($line);
 782         next if $line =~m/^#/;
 783         next if ($line =~m/^\s*$/);
 784
 785         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 786             $services->{byid}->{$2}->{name} = $1;
 787             $services->{byid}->{$2}->{port} = $2;
 788             $services->{byid}->{$2}->{$3} = 1;
 789             $services->{byname}->{$1} = $services->{byid}->{$2};
 790         }
 791     }
 792
 793     close($fh);
 794
 795     $etc_services = $services;
 796
 797
 798     return $etc_services;
 799 }
 800
 801 my $etc_protocols;
 802
 803 sub get_etc_protocols {
 804     return $etc_protocols if $etc_protocols;
 805
 806     my $filename = "/etc/protocols";
 807
 808     my $fh = IO::File->new($filename, O_RDONLY);
 809     if (!$fh) {
 810         warn "unable to read '$filename' - $!\n";
 811         return {};
 812     }
 813
 814     my $protocols = {};
 815
 816     while (my $line = <$fh>) {
 817         chomp ($line);
 818         next if $line =~m/^#/;
 819         next if ($line =~m/^\s*$/);
 820
 821         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 822             $protocols->{byid}->{$2}->{name} = $1;
 823             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 824         }
 825     }
 826
 827     close($fh);
 828
 829     # add special case for ICMP v6
 830     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 831     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 832
 833     $etc_protocols = $protocols;
 834
 835     return $etc_protocols;
 836 }
 837
 838 my $ipv4_mask_hash_localnet = {
 839     '255.255.0.0' => 16,
 840     '255.255.128.0' => 17,
 841     '255.255.192.0' => 18,
 842     '255.255.224.0' => 19,
 843     '255.255.240.0' => 20,
 844     '255.255.248.0' => 21,
 845     '255.255.252.0' => 22,
 846     '255.255.254.0' => 23,
 847     '255.255.255.0' => 24,
 848     '255.255.255.128' => 25,
 849     '255.255.255.192' => 26,
 850     '255.255.255.224' => 27,
 851     '255.255.255.240' => 28,
 852     '255.255.255.248' => 29,
 853     '255.255.255.252' => 30,
 854 };
 855
 856 my $__local_network;
 857
 858 sub local_network {
 859     my ($new_value) = @_;
 860
 861     $__local_network = $new_value if defined($new_value);
 862
 863     return $__local_network if defined($__local_network);
 864
 865     eval {
 866         my $nodename = PVE::INotify::nodename();
 867
 868         my $ip = PVE::Cluster::remote_node_ip($nodename);
 869
 870         my $testip = Net::IP->new($ip);
 871
 872         my $routes = PVE::ProcFSTools::read_proc_net_route();
 873         foreach my $entry (@$routes) {
 874             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 875             next if !defined($mask);
 876             return if $mask eq '0.0.0.0';
 877             my $cidr = "$entry->{dest}/$mask";
 878             my $testnet = Net::IP->new($cidr);
 879             if ($testnet->overlaps($testip)) {
 880                 $__local_network = $cidr;
 881                 return;
 882             }
 883         }
 884     };
 885     warn $@ if $@;
 886
 887     return $__local_network;
 888 }
 889
 890 # ipset names are limited to 31 characters,
 891 # and we use '-v4' or '-v6' to indicate IP versions,
 892 # and we use '_swap' suffix for atomic update,
 893 # for example PVEFW-${VMID}-${ipset_name}_swap
 894
 895 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 896
 897 sub compute_ipset_chain_name {
 898     my ($vmid, $ipset_name, $ipversion) = @_;
 899
 900     $vmid = 0 if !defined($vmid);
 901
 902     my $id = "$vmid-${ipset_name}-v$ipversion";
 903
 904     if (length($id) > $max_iptables_ipset_name_length) {
 905         $id = PVE::Tools::fnv31a_hex($id);
 906     }
 907
 908     return "PVEFW-$id";
 909 }
 910
 911 sub compute_ipfilter_ipset_name {
 912     my ($iface) = @_;
 913
 914     return "ipfilter-$iface";
 915 }
 916
 917 sub parse_address_list {
 918     my ($str) = @_;
 919
 920     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 921         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 922         return;
 923     }
 924
 925     if ($str =~ m/^${ip_alias_pattern}$/) {
 926         die "alias name too long\n" if length($str) > $max_alias_name_length;
 927         return;
 928     }
 929
 930     my $count = 0;
 931     my $iprange = 0;
 932     my $ipversion;
 933
 934     foreach my $elem (split(/,/, $str)) {
 935         $count++;
 936         my $ip = Net::IP->new($elem);
 937         if (!$ip) {
 938             my $err = Net::IP::Error();
 939             die "invalid IP address: $err\n";
 940         }
 941         $iprange = 1 if $elem =~ m/-/;
 942
 943         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 944
 945         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 946             if $ipversion && ($new_ipversion != $ipversion);
 947
 948         $ipversion = $new_ipversion;
 949     }
 950
 951     die "you can't use a range in a list\n" if $iprange && $count > 1;
 952
 953     return $ipversion;
 954 }
 955
 956 sub parse_port_name_number_or_range {
 957     my ($str) = @_;
 958
 959     my $services = PVE::Firewall::get_etc_services();
 960     my $count = 0;
 961     my $icmp_port = 0;
 962
 963     foreach my $item (split(/,/, $str)) {
 964         $count++;
 965         if ($item =~ m/^(\d+):(\d+)$/) {
 966             my ($port1, $port2) = ($1, $2);
 967             die "invalid port '$port1'\n" if $port1 > 65535;
 968             die "invalid port '$port2'\n" if $port2 > 65535;
 969         } elsif ($item =~ m/^(\d+)$/) {
 970             my $port = $1;
 971             die "invalid port '$port'\n" if $port > 65535;
 972         } else {
 973             if ($icmp_type_names->{$item}) {
 974                 $icmp_port = 1;
 975             } elsif ($icmpv6_type_names->{$item}) {
 976                 $icmp_port = 1;
 977             } else {
 978                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 979             }
 980         }
 981     }
 982
 983     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 984
 985     return $count;
 986 }
 987
 988 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 989 sub pve_fw_verify_port_spec {
 990    my ($portstr) = @_;
 991
 992    parse_port_name_number_or_range($portstr);
 993
 994    return $portstr;
 995 }
 996
 997 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 998 sub pve_fw_verify_addr_spec {
 999    my ($list) = @_;
1000
1001    parse_address_list($list);
1002
1003    return $list;
1004 }
1005
1006 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1007 sub pve_fw_verify_protocol_spec {
1008    my ($proto) = @_;
1009
1010    my $protocols = get_etc_protocols();
1011
1012    die "unknown protocol '$proto'\n" if $proto &&
1013        !(defined($protocols->{byname}->{$proto}) ||
1014          defined($protocols->{byid}->{$proto}));
1015
1016    return $proto;
1017 }
1018
1019
1020 # helper function for API
1021
1022 sub copy_opject_with_digest {
1023     my ($object) = @_;
1024
1025     my $sha = Digest::SHA->new('sha1');
1026
1027     my $res = {};
1028     foreach my $k (sort keys %$object) {
1029         my $v = $object->{$k};
1030         next if !defined($v);
1031         $res->{$k} = $v;
1032         $sha->add($k, ':', $v, "\n");
1033     }
1034
1035     my $digest = $sha->hexdigest;
1036
1037     $res->{digest} = $digest;
1038
1039     return wantarray ? ($res, $digest) : $res;
1040 }
1041
1042 sub copy_list_with_digest {
1043     my ($list) = @_;
1044
1045     my $sha = Digest::SHA->new('sha1');
1046
1047     my $res = [];
1048     foreach my $entry (@$list) {
1049         my $data = {};
1050         foreach my $k (sort keys %$entry) {
1051             my $v = $entry->{$k};
1052             next if !defined($v);
1053             $data->{$k} = $v;
1054             # Note: digest ignores refs ($rule->{errors})
1055             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1056         }
1057         push @$res, $data;
1058     }
1059
1060     my $digest = $sha->hexdigest;
1061
1062     foreach my $entry (@$res) {
1063         $entry->{digest} = $digest;
1064     }
1065
1066     return wantarray ? ($res, $digest) : $res;
1067 }
1068
1069 my $rule_properties = {
1070     pos => {
1071         description => "Update rule at position <pos>.",
1072         type => 'integer',
1073         minimum => 0,
1074         optional => 1,
1075     },
1076     digest => get_standard_option('pve-config-digest'),
1077     type => {
1078         type => 'string',
1079         optional => 1,
1080         enum => ['in', 'out', 'group'],
1081     },
1082     action => {
1083         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1084         type => 'string',
1085         optional => 1,
1086         pattern => $security_group_name_pattern,
1087         maxLength => 20,
1088         minLength => 2,
1089     },
1090     macro => {
1091         type => 'string',
1092         optional => 1,
1093         maxLength => 128,
1094     },
1095     iface => get_standard_option('pve-iface', { optional => 1 }),
1096     source => {
1097         type => 'string', format => 'pve-fw-addr-spec',
1098         optional => 1,
1099     },
1100     dest => {
1101         type => 'string', format => 'pve-fw-addr-spec',
1102         optional => 1,
1103     },
1104     proto => {
1105         type => 'string', format => 'pve-fw-protocol-spec',
1106         optional => 1,
1107     },
1108     enable => {
1109         type => 'boolean',
1110         optional => 1,
1111     },
1112     sport => {
1113         type => 'string', format => 'pve-fw-port-spec',
1114         optional => 1,
1115     },
1116     dport => {
1117         type => 'string', format => 'pve-fw-port-spec',
1118         optional => 1,
1119     },
1120     comment => {
1121         type => 'string',
1122         optional => 1,
1123     },
1124 };
1125
1126 sub add_rule_properties {
1127     my ($properties) = @_;
1128
1129     foreach my $k (keys %$rule_properties) {
1130         my $h = $rule_properties->{$k};
1131         # copy data, so that we can modify later without side effects
1132         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1133     }
1134
1135     return $properties;
1136 }
1137
1138 sub delete_rule_properties {
1139     my ($rule, $delete_str) = @_;
1140
1141     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1142         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1143             if !defined($rule_properties->{$opt});
1144         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1145             if $opt eq 'type' || $opt eq 'action';
1146         delete $rule->{$opt};
1147     }
1148
1149     return $rule;
1150 }
1151
1152 my $apply_macro = sub {
1153     my ($macro_name, $param, $verify, $ipversion) = @_;
1154
1155     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1156     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1157
1158     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1159         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1160     }
1161
1162     my $rules = [];
1163
1164     foreach my $templ (@$macro_rules) {
1165         my $rule = {};
1166         my $param_used = {};
1167         foreach my $k (keys %$templ) {
1168             my $v = $templ->{$k};
1169             if ($v eq 'PARAM') {
1170                 $v = $param->{$k};
1171                 $param_used->{$k} = 1;
1172             } elsif ($v eq 'DEST') {
1173                 $v = $param->{dest};
1174                 $param_used->{dest} = 1;
1175             } elsif ($v eq 'SOURCE') {
1176                 $v = $param->{source};
1177                 $param_used->{source} = 1;
1178             }
1179
1180             if (!defined($v)) {
1181                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1182                 raise_param_exc({ macro => $msg }) if $verify;
1183                 die "$msg\n";
1184             }
1185             $rule->{$k} = $v;
1186         }
1187         foreach my $k (keys %$param) {
1188             next if $k eq 'macro';
1189             next if !defined($param->{$k});
1190             next if $param_used->{$k};
1191             if (defined($rule->{$k})) {
1192                 if ($rule->{$k} ne $param->{$k}) {
1193                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1194                     raise_param_exc({ $k => $msg }) if $verify;
1195                     die "$msg\n";
1196                 }
1197             } else {
1198                 $rule->{$k} = $param->{$k};
1199             }
1200         }
1201         push @$rules, $rule;
1202     }
1203
1204     return $rules;
1205 };
1206
1207 my $rule_env_iface_lookup = {
1208     'ct' => 1,
1209     'vm' => 1,
1210     'group' => 0,
1211     'cluster' => 1,
1212     'host' => 1,
1213 };
1214
1215 sub verify_rule {
1216     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1217
1218     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1219
1220     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1221     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1222
1223     my $errors = $rule->{errors} || {};
1224
1225     my $error_count = 0;
1226
1227     my $add_error = sub {
1228         my ($param, $msg)  = @_;
1229         chomp $msg;
1230         raise_param_exc({ $param => $msg }) if !$noerr;
1231         $error_count++;
1232         $errors->{$param} = $msg if !$errors->{$param};
1233     };
1234
1235     my $ipversion;
1236     my $set_ip_version = sub {
1237         my $vers = shift;
1238         if ($vers) {
1239             die "detected mixed ipv4/ipv6 adresses in rule\n"
1240                 if $ipversion && ($vers != $ipversion);
1241             $ipversion = $vers;
1242         }
1243     };
1244
1245     my $check_ipset_or_alias_property = sub {
1246         my ($name, $expected_ipversion) = @_;
1247
1248         if (my $value = $rule->{$name}) {
1249             if ($value =~ m/^\+/) {
1250                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1251                     &$add_error($name, "no such ipset '$1'")
1252                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1253
1254                 } else {
1255                     &$add_error($name, "invalid ipset name '$value'");
1256                 }
1257             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1258                 my $alias = lc($value);
1259                 &$add_error($name, "no such alias '$value'")
1260                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1261                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1262                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1263
1264                 &$set_ip_version($e->{ipversion});
1265             }
1266         }
1267     };
1268
1269     my $type = $rule->{type};
1270     my $action = $rule->{action};
1271
1272     &$add_error('type', "missing property") if !$type;
1273     &$add_error('action', "missing property") if !$action;
1274
1275     if ($type) {
1276         if ($type eq  'in' || $type eq 'out') {
1277             &$add_error('action', "unknown action '$action'")
1278                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1279         } elsif ($type eq 'group') {
1280             &$add_error('type', "security groups not allowed")
1281                 if !$allow_groups;
1282             &$add_error('action', "invalid characters in security group name")
1283                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1284         } else {
1285             &$add_error('type', "unknown rule type '$type'");
1286         }
1287     }
1288
1289     if ($rule->{iface}) {
1290         &$add_error('type', "parameter -i not allowed for this rule type")
1291             if !$allow_iface;
1292         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1293         &$add_error('iface', $@) if $@;
1294         if ($rule_env eq 'vm') {
1295             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1296                 if $rule->{iface} !~  m/^net(\d+)$/;
1297         } elsif ($rule_env eq 'ct') {
1298             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1299                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1300         }
1301     }
1302
1303     if ($rule->{macro}) {
1304         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1305             $rule->{macro} = $preferred_name;
1306         } else {
1307             &$add_error('macro', "unknown macro '$rule->{macro}'");
1308         }
1309     }
1310
1311     if ($rule->{proto}) {
1312         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1313         &$add_error('proto', $@) if $@;
1314         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1315         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1316     }
1317
1318     if ($rule->{dport}) {
1319         eval { parse_port_name_number_or_range($rule->{dport}); };
1320         &$add_error('dport', $@) if $@;
1321         &$add_error('proto', "missing property - 'dport' requires this property")
1322             if !$rule->{proto};
1323     }
1324
1325     if ($rule->{sport}) {
1326         eval { parse_port_name_number_or_range($rule->{sport}); };
1327         &$add_error('sport', $@) if $@;
1328         &$add_error('proto', "missing property - 'sport' requires this property")
1329             if !$rule->{proto};
1330     }
1331
1332     if ($rule->{source}) {
1333         eval {
1334             my $source_ipversion = parse_address_list($rule->{source});
1335             &$set_ip_version($source_ipversion);
1336         };
1337         &$add_error('source', $@) if $@;
1338         &$check_ipset_or_alias_property('source', $ipversion);
1339     }
1340
1341     if ($rule->{dest}) {
1342         eval {
1343             my $dest_ipversion = parse_address_list($rule->{dest});
1344             &$set_ip_version($dest_ipversion);
1345         };
1346         &$add_error('dest', $@) if $@;
1347         &$check_ipset_or_alias_property('dest', $ipversion);
1348     }
1349
1350     $rule->{ipversion} = $ipversion if $ipversion;
1351
1352     if ($rule->{macro} && !$error_count) {
1353         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1354         if (my $err = $@) {
1355             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1356                 my $eh = $err->{errors};
1357                 foreach my $p (keys %$eh) {
1358                     &$add_error($p, $eh->{$p});
1359                 }
1360             } else {
1361                 &$add_error('macro', "$err");
1362             }
1363         }
1364     }
1365
1366     $rule->{errors} = $errors if $error_count;
1367
1368     return $rule;
1369 }
1370
1371 sub copy_rule_data {
1372     my ($rule, $param) = @_;
1373
1374     foreach my $k (keys %$rule_properties) {
1375         if (defined(my $v = $param->{$k})) {
1376             if ($v eq '' || $v eq '-') {
1377                 delete $rule->{$k};
1378             } else {
1379                 $rule->{$k} = $v;
1380             }
1381         }
1382     }
1383
1384     return $rule;
1385 }
1386
1387 sub rules_modify_permissions {
1388     my ($rule_env) = @_;
1389
1390     if ($rule_env eq 'host') {
1391         return {
1392             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1393         };
1394     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1395         return {
1396             check => ['perm', '/', [ 'Sys.Modify' ]],
1397         };
1398     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1399         return {
1400             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1401         }
1402     }
1403
1404     return undef;
1405 }
1406
1407 sub rules_audit_permissions {
1408     my ($rule_env) = @_;
1409
1410     if ($rule_env eq 'host') {
1411         return {
1412             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1413         };
1414     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1415         return {
1416             check => ['perm', '/', [ 'Sys.Audit' ]],
1417         };
1418     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1419         return {
1420             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1421         }
1422     }
1423
1424     return undef;
1425 }
1426
1427 # core functions
1428 my $bridge_firewall_enabled = 0;
1429
1430 sub enable_bridge_firewall {
1431
1432     return if $bridge_firewall_enabled; # only once
1433
1434     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1435     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1436
1437     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1438     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1439
1440     $bridge_firewall_enabled = 1;
1441 }
1442
1443 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1444
1445 sub iptables_restore_cmdlist {
1446     my ($cmdlist) = @_;
1447
1448     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1449 }
1450
1451 sub ip6tables_restore_cmdlist {
1452     my ($cmdlist) = @_;
1453
1454     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1455 }
1456
1457 sub ipset_restore_cmdlist {
1458     my ($cmdlist) = @_;
1459
1460     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1461 }
1462
1463 sub iptables_get_chains {
1464     my ($iptablescmd) = @_;
1465
1466     $iptablescmd = "iptables" if !$iptablescmd;
1467
1468     my $res = {};
1469
1470     # check what chains we want to track
1471     my $is_pvefw_chain = sub {
1472         my $name = shift;
1473
1474         return 1 if $name =~ m/^PVEFW-\S+$/;
1475
1476         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1477
1478         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1479
1480         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1481
1482         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1483         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1484
1485         return undef;
1486     };
1487
1488     my $table = '';
1489
1490     my $hooks = {};
1491
1492     my $parser = sub {
1493         my $line = shift;
1494
1495         return if $line =~ m/^#/;
1496         return if $line =~ m/^\s*$/;
1497
1498         if ($line =~ m/^\*(\S+)$/) {
1499             $table = $1;
1500             return;
1501         }
1502
1503         return if $table ne 'filter';
1504
1505         if ($line =~ m/^:(\S+)\s/) {
1506             my $chain = $1;
1507             return if !&$is_pvefw_chain($chain);
1508             $res->{$chain} = "unknown";
1509         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1510             my ($chain, $sig) = ($1, $2);
1511             return if !&$is_pvefw_chain($chain);
1512             $res->{$chain} = $sig;
1513         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1514             $hooks->{$1} = 1;
1515         } else {
1516             # simply ignore the rest
1517             return;
1518         }
1519     };
1520
1521     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1522
1523     return wantarray ? ($res, $hooks) : $res;
1524 }
1525
1526 sub iptables_chain_digest {
1527     my ($rules) = @_;
1528     my $digest = Digest::SHA->new('sha1');
1529     foreach my $rule (@$rules) { # order is important
1530         $digest->add($rule);
1531     }
1532     return $digest->b64digest;
1533 }
1534
1535 sub ipset_chain_digest {
1536     my ($rules) = @_;
1537
1538     my $digest = Digest::SHA->new('sha1');
1539     foreach my $rule (sort @$rules) { # note: sorted
1540         $digest->add($rule);
1541     }
1542     return $digest->b64digest;
1543 }
1544
1545 sub ipset_get_chains {
1546
1547     my $res = {};
1548     my $chains = {};
1549
1550     my $parser = sub {
1551         my $line = shift;
1552
1553         return if $line =~ m/^#/;
1554         return if $line =~ m/^\s*$/;
1555         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1556             my $chain = $1;
1557             $line =~ s/\s+$//; # delete trailing white space
1558             push @{$chains->{$chain}}, $line;
1559         } else {
1560             # simply ignore the rest
1561             return;
1562         }
1563     };
1564
1565     run_command("/usr/sbin/ipset save", outfunc => $parser);
1566
1567     # compute digest for each chain
1568     foreach my $chain (keys %$chains) {
1569         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1570     }
1571
1572     return $res;
1573 }
1574
1575 sub ruleset_generate_cmdstr {
1576     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1577
1578     return if defined($rule->{enable}) && !$rule->{enable};
1579     return if $rule->{errors};
1580
1581     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1582
1583     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1584     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1585
1586     my @cmd = ();
1587
1588     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1589     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1590
1591     my $source = $rule->{source};
1592     my $dest = $rule->{dest};
1593
1594     if ($source) {
1595         if ($source =~ m/^\+/) {
1596             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1597                 my $name = $1;
1598                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1599                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1600                     push @cmd, "-m set --match-set ${ipset_chain} src";
1601                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1602                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1603                     push @cmd, "-m set --match-set ${ipset_chain} src";
1604                 } else {
1605                     die "no such ipset '$name'\n";
1606                 }
1607             } else {
1608                 die "invalid security group name '$source'\n";
1609             }
1610         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1611             my $alias = lc($source);
1612             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1613             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1614             die "no such alias '$source'\n" if !$e;
1615             push @cmd, "-s $e->{cidr}";
1616         } elsif ($source =~ m/\-/){
1617             push @cmd, "-m iprange --src-range $source";
1618         } else {
1619             push @cmd, "-s $source";
1620         }
1621     }
1622
1623     if ($dest) {
1624         if ($dest =~ m/^\+/) {
1625             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1626                 my $name = $1;
1627                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1628                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1629                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1630                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1631                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1632                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1633                 } else {
1634                     die "no such ipset '$name'\n";
1635                 }
1636             } else {
1637                 die "invalid security group name '$dest'\n";
1638             }
1639         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1640             my $alias = lc($dest);
1641             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1642             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1643             die "no such alias '$dest'\n" if !$e;
1644             push @cmd, "-d $e->{cidr}";
1645         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1646             push @cmd, "-m iprange --dst-range $dest";
1647         } else {
1648             push @cmd, "-d $dest";
1649         }
1650     }
1651
1652     if ($rule->{proto}) {
1653         push @cmd, "-p $rule->{proto}";
1654
1655         my $multiport = 0;
1656         $multiport++ if $nbdport > 1;
1657         $multiport++ if $nbsport > 1;
1658
1659         push @cmd, "--match multiport" if $multiport;
1660
1661         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1662             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1663
1664         if ($rule->{dport}) {
1665             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1666                 # Note: we use dport to store --icmp-type
1667                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1668                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1669             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1670                 # Note: we use dport to store --icmpv6-type
1671                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1672                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1673             } else {
1674                 if ($nbdport > 1) {
1675                     if ($multiport == 2) {
1676                         push @cmd,  "--ports $rule->{dport}";
1677                     } else {
1678                         push @cmd, "--dports $rule->{dport}";
1679                     }
1680                 } else {
1681                     push @cmd, "--dport $rule->{dport}";
1682                 }
1683             }
1684         }
1685
1686         if ($rule->{sport}) {
1687             if ($nbsport > 1) {
1688                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1689             } else {
1690                 push @cmd, "--sport $rule->{sport}";
1691             }
1692         }
1693     } elsif ($rule->{dport} || $rule->{sport}) {
1694         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1695         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1696     }
1697
1698     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1699
1700     if (my $action = $rule->{action}) {
1701         $action = $actions->{$action} if defined($actions->{$action});
1702         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1703         push @cmd, $goto ? "-g $action" : "-j $action";
1704     }
1705
1706     return scalar(@cmd) ? join(' ', @cmd) : undef;
1707 }
1708
1709 sub ruleset_generate_rule {
1710     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1711
1712     my $rules;
1713
1714     if ($rule->{macro}) {
1715         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1716     } else {
1717         $rules = [ $rule ];
1718     }
1719
1720     # update all or nothing
1721
1722     my @cmds = ();
1723     foreach my $tmp (@$rules) {
1724         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1725             push @cmds, $cmdstr;
1726         }
1727     }
1728
1729     foreach my $cmdstr (@cmds) {
1730         ruleset_addrule($ruleset, $chain, $cmdstr);
1731     }
1732 }
1733
1734 sub ruleset_generate_rule_insert {
1735     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1736
1737     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1738
1739     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1740         ruleset_insertrule($ruleset, $chain, $cmdstr);
1741     }
1742 }
1743
1744 sub ruleset_create_chain {
1745     my ($ruleset, $chain) = @_;
1746
1747     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1748     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1749
1750     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1751
1752     $ruleset->{$chain} = [];
1753 }
1754
1755 sub ruleset_chain_exist {
1756     my ($ruleset, $chain) = @_;
1757
1758     return $ruleset->{$chain} ? 1 : undef;
1759 }
1760
1761 sub ruleset_addrule {
1762    my ($ruleset, $chain, $rule) = @_;
1763
1764    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1765
1766    push @{$ruleset->{$chain}}, "-A $chain $rule";
1767 }
1768
1769 sub ruleset_insertrule {
1770    my ($ruleset, $chain, $rule) = @_;
1771
1772    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1773
1774    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1775 }
1776
1777 sub get_log_rule_base {
1778     my ($chain, $vmid, $msg, $loglevel) = @_;
1779
1780     die "internal error - no log level" if !defined($loglevel);
1781
1782     $vmid = 0 if !defined($vmid);
1783
1784     # Note: we use special format for prefix to pass further
1785     # info to log daemon (VMID, LOGVELEL and CHAIN)
1786
1787     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1788 }
1789
1790 sub ruleset_addlog {
1791     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1792
1793     return if !defined($loglevel);
1794
1795     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1796
1797     $logrule = "$rule $logrule" if defined($rule);
1798
1799     ruleset_addrule($ruleset, $chain, $logrule);
1800 }
1801
1802 sub ruleset_add_chain_policy {
1803     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1804
1805     if ($policy eq 'ACCEPT') {
1806
1807         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1808                               { ACCEPT =>  $accept_action});
1809
1810     } elsif ($policy eq 'DROP') {
1811
1812         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1813
1814         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1815
1816         ruleset_addrule($ruleset, $chain, "-j DROP");
1817     } elsif ($policy eq 'REJECT') {
1818         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1819
1820         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1821
1822         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1823     } else {
1824         # should not happen
1825         die "internal error: unknown policy '$policy'";
1826     }
1827 }
1828
1829 sub ruleset_chain_add_conn_filters {
1830     my ($ruleset, $chain, $accept) = @_;
1831
1832     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1833     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1834 }
1835
1836 sub ruleset_chain_add_input_filters {
1837     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1838
1839     if ($cluster_conf->{ipset}->{blacklist}){
1840         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1841             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1842             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1843             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1844         }
1845         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1846         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1847     }
1848
1849     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1850         if ($ipversion == 4) {
1851             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1852         }
1853     }
1854
1855     if ($options->{tcpflags}) {
1856         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1857     }
1858 }
1859
1860 sub ruleset_create_vm_chain {
1861     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1862
1863     ruleset_create_chain($ruleset, $chain);
1864     my $accept = generate_nfqueue($options);
1865
1866     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1867         if ($direction eq 'OUT') {
1868             ruleset_generate_rule($ruleset, $chain, $ipversion,
1869                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1870                                     proto => 'udp', sport => 68, dport => 67 });
1871         } else {
1872             ruleset_generate_rule($ruleset, $chain, $ipversion,
1873                                   { action => 'ACCEPT',
1874                                     proto => 'udp', sport => 67, dport => 68 });
1875         }
1876     }
1877
1878     if ($direction eq 'OUT') {
1879         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1880             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1881         }
1882         if ($ipfilter_ipset) {
1883             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1884         }
1885         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1886     }
1887 }
1888
1889 sub ruleset_add_group_rule {
1890     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1891
1892     my $group = $rule->{action};
1893     my $group_chain = "GROUP-$group-$direction";
1894     if(!ruleset_chain_exist($ruleset, $group_chain)){
1895         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1896     }
1897
1898     if ($direction eq 'OUT' && $rule->{iface_out}) {
1899         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1900     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1901         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1902     } else {
1903         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1904     }
1905
1906     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1907 }
1908
1909 sub ruleset_generate_vm_rules {
1910     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1911
1912     my $lc_direction = lc($direction);
1913
1914     my $in_accept = generate_nfqueue($options);
1915
1916     foreach my $rule (@$rules) {
1917         next if $rule->{iface} && $rule->{iface} ne $netid;
1918         next if !$rule->{enable} || $rule->{errors};
1919         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1920
1921         if ($rule->{type} eq 'group') {
1922             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1923                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1924         } else {
1925             next if $rule->{type} ne $lc_direction;
1926             eval {
1927                 if ($direction eq 'OUT') {
1928                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1929                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1930                                           undef, $cluster_conf, $vmfw_conf);
1931                 } else {
1932                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1933                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1934                                           undef, $cluster_conf, $vmfw_conf);
1935                 }
1936             };
1937             warn $@ if $@;
1938         }
1939     }
1940 }
1941
1942 sub generate_nfqueue {
1943     my ($options) = @_;
1944
1945     if ($options->{ips}) {
1946         my $action = "NFQUEUE";
1947         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1948             if (defined($3) && defined($1)) {
1949                 $action .= " --queue-balance $1:$3";
1950             } elsif (defined($1)) {
1951                 $action .= " --queue-num $1";
1952             }
1953         }
1954         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1955         return $action;
1956     } else {
1957         return "ACCEPT";
1958     }
1959 }
1960
1961 sub ruleset_generate_vm_ipsrules {
1962     my ($ruleset, $options, $direction, $iface) = @_;
1963
1964     if ($options->{ips} && $direction eq 'IN') {
1965         my $nfqueue = generate_nfqueue($options);
1966
1967         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1968             ruleset_create_chain($ruleset, "PVEFW-IPS");
1969         }
1970
1971         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1972     }
1973 }
1974
1975 sub generate_venet_rules_direction {
1976     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1977
1978     my $lc_direction = lc($direction);
1979
1980     my $rules = $vmfw_conf->{rules};
1981
1982     my $options = $vmfw_conf->{options};
1983     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1984
1985     my $chain = "venet0-$vmid-$direction";
1986
1987     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
1988
1989     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1990
1991     # implement policy
1992     my $policy;
1993
1994     if ($direction eq 'OUT') {
1995         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1996     } else {
1997         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1998     }
1999
2000     my $accept = generate_nfqueue($options);
2001     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2002     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2003
2004     if ($direction eq 'OUT') {
2005         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2006             action => $chain,
2007             source => $ip,
2008             iface_in => 'venet0'});
2009     } else {
2010         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2011             action => $chain,
2012             dest => $ip,
2013             iface_out => 'venet0'});
2014     }
2015 }
2016
2017 sub generate_tap_rules_direction {
2018     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2019
2020     my $lc_direction = lc($direction);
2021
2022     my $rules = $vmfw_conf->{rules};
2023
2024     my $options = $vmfw_conf->{options};
2025     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2026
2027     my $tapchain = "$iface-$direction";
2028
2029     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2030     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2031         if $vmfw_conf->{ipset}->{$ipfilter_name};
2032
2033     # create chain with mac and ip filter
2034     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2035
2036     if ($options->{enable}) {
2037         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2038
2039         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2040
2041         # implement policy
2042         my $policy;
2043
2044         if ($direction eq 'OUT') {
2045             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2046         } else {
2047         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2048         }
2049
2050         my $accept = generate_nfqueue($options);
2051         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2052         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2053     } else {
2054         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2055         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2056     }
2057
2058     # plug the tap chain to bridge chain
2059     if ($direction eq 'IN') {
2060         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2061                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2062     } else {
2063         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2064                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2065     }
2066 }
2067
2068 sub enable_host_firewall {
2069     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2070
2071     my $options = $hostfw_conf->{options};
2072     my $cluster_options = $cluster_conf->{options};
2073     my $rules = $hostfw_conf->{rules};
2074     my $cluster_rules = $cluster_conf->{rules};
2075
2076     # host inbound firewall
2077     my $chain = "PVEFW-HOST-IN";
2078     ruleset_create_chain($ruleset, $chain);
2079
2080     my $loglevel = get_option_log_level($options, "log_level_in");
2081
2082     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2083
2084     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2085     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2086
2087     # we use RETURN because we need to check also tap rules
2088     my $accept_action = 'RETURN';
2089
2090     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2091
2092     # add host rules first, so that cluster wide rules can be overwritten
2093     foreach my $rule (@$rules, @$cluster_rules) {
2094         next if !$rule->{enable} || $rule->{errors};
2095         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2096
2097         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2098
2099         eval {
2100             if ($rule->{type} eq 'group') {
2101                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2102             } elsif ($rule->{type} eq 'in') {
2103                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2104                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2105                                       undef, $cluster_conf, $hostfw_conf);
2106             }
2107         };
2108         warn $@ if $@;
2109         delete $rule->{iface_in};
2110     }
2111
2112     # allow standard traffic for management ipset (includes cluster network)
2113     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2114     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2115     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2116     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2117     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2118     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2119
2120     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2121     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2122
2123     # corosync
2124     if ($localnet && ($ipversion == $localnet_ver)) {
2125         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2126         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2127         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2128     }
2129
2130     # implement input policy
2131     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2132     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2133
2134     # host outbound firewall
2135     $chain = "PVEFW-HOST-OUT";
2136     ruleset_create_chain($ruleset, $chain);
2137
2138     $loglevel = get_option_log_level($options, "log_level_out");
2139
2140     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2141
2142     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2143
2144     # we use RETURN because we may want to check other thigs later
2145     $accept_action = 'RETURN';
2146
2147     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2148
2149     # add host rules first, so that cluster wide rules can be overwritten
2150     foreach my $rule (@$rules, @$cluster_rules) {
2151         next if !$rule->{enable} || $rule->{errors};
2152         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2153
2154         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2155         eval {
2156             if ($rule->{type} eq 'group') {
2157                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2158             } elsif ($rule->{type} eq 'out') {
2159                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2160                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2161                                       undef, $cluster_conf, $hostfw_conf);
2162             }
2163         };
2164         warn $@ if $@;
2165         delete $rule->{iface_out};
2166     }
2167
2168     # allow standard traffic on cluster network
2169     if ($localnet && ($ipversion == $localnet_ver)) {
2170         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2171         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2172         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2173         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2174
2175         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2176         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2177         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2178     }
2179
2180     # implement output policy
2181     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2182     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2183
2184     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2185     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2186 }
2187
2188 sub generate_group_rules {
2189     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2190
2191     my $rules = $cluster_conf->{groups}->{$group};
2192
2193     if (!$rules) {
2194         warn "no such security group '$group'\n";
2195         $rules = []; # create empty chain
2196     }
2197
2198     my $chain = "GROUP-${group}-IN";
2199
2200     ruleset_create_chain($ruleset, $chain);
2201     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2202
2203     foreach my $rule (@$rules) {
2204         next if $rule->{type} ne 'in';
2205         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2206         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2207                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2208                               undef, $cluster_conf);
2209     }
2210
2211     $chain = "GROUP-${group}-OUT";
2212
2213     ruleset_create_chain($ruleset, $chain);
2214     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2215
2216     foreach my $rule (@$rules) {
2217         next if $rule->{type} ne 'out';
2218         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2219         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2220         # check also other tap rules later
2221         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2222                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2223                               undef, $cluster_conf);
2224     }
2225 }
2226
2227 my $MAX_NETS = 32;
2228 my $valid_netdev_names = {};
2229 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2230     $valid_netdev_names->{"net$i"} = 1;
2231 }
2232
2233 sub parse_fw_rule {
2234     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2235
2236     my $orig_line = $line;
2237
2238     my $rule = {};
2239
2240     # we can add single line comments to the end of the rule
2241     if ($line =~ s/#\s*(.*?)\s*$//) {
2242         $rule->{comment} = decode('utf8', $1);
2243     }
2244
2245     # we can disable a rule when prefixed with '|'
2246
2247     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2248
2249     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2250         die "unable to parse rule: $line\n";
2251
2252     $rule->{type} = lc($1);
2253     $rule->{action} = $2;
2254
2255     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2256         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2257             $rule->{macro} = $1;
2258             $rule->{action} = $2;
2259         }
2260     }
2261
2262     while (length($line)) {
2263         if ($line =~ s/^-i (\S+)\s*//) {
2264             $rule->{iface} = $1;
2265             next;
2266         }
2267
2268         last if $rule->{type} eq 'group';
2269
2270         if ($line =~ s/^-p (\S+)\s*//) {
2271             $rule->{proto} = $1;
2272             next;
2273         }
2274
2275         if ($line =~ s/^-dport (\S+)\s*//) {
2276             $rule->{dport} = $1;
2277             next;
2278         }
2279
2280         if ($line =~ s/^-sport (\S+)\s*//) {
2281             $rule->{sport} = $1;
2282             next;
2283         }
2284         if ($line =~ s/^-source (\S+)\s*//) {
2285             $rule->{source} = $1;
2286             next;
2287         }
2288         if ($line =~ s/^-dest (\S+)\s*//) {
2289             $rule->{dest} = $1;
2290             next;
2291         }
2292
2293         last;
2294     }
2295
2296     die "unable to parse rule parameters: $line\n" if length($line);
2297
2298     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2299     if ($verbose && $rule->{errors}) {
2300         warn "$prefix - errors in rule parameters: $orig_line\n";
2301         foreach my $p (keys %{$rule->{errors}}) {
2302             warn "  $p: $rule->{errors}->{$p}\n";
2303         }
2304     }
2305
2306     return $rule;
2307 }
2308
2309 sub parse_vmfw_option {
2310     my ($line) = @_;
2311
2312     my ($opt, $value);
2313
2314     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2315
2316     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2317         $opt = lc($1);
2318         $value = int($2);
2319     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2320         $opt = lc($1);
2321         $value = $2 ? lc($3) : '';
2322     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2323         $opt = lc($1);
2324         $value = uc($3);
2325     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2326         $opt = lc($1);
2327         $value = $2;
2328     } else {
2329         die "can't parse option '$line'\n"
2330     }
2331
2332     return ($opt, $value);
2333 }
2334
2335 sub parse_hostfw_option {
2336     my ($line) = @_;
2337
2338     my ($opt, $value);
2339
2340     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2341
2342     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2343         $opt = lc($1);
2344         $value = int($2);
2345     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2346         $opt = lc($1);
2347         $value = $2 ? lc($3) : '';
2348     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2349         $opt = lc($1);
2350         $value = int($2);
2351     } else {
2352         die "can't parse option '$line'\n"
2353     }
2354
2355     return ($opt, $value);
2356 }
2357
2358 sub parse_clusterfw_option {
2359     my ($line) = @_;
2360
2361     my ($opt, $value);
2362
2363     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2364         $opt = lc($1);
2365         $value = int($2);
2366     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2367         $opt = lc($1);
2368         $value = uc($3);
2369     } else {
2370         die "can't parse option '$line'\n"
2371     }
2372
2373     return ($opt, $value);
2374 }
2375
2376 sub resolve_alias {
2377     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2378
2379     my $alias = lc($cidr);
2380     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2381     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2382
2383     die "no such alias '$cidr'\n" if !$e;;
2384
2385     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2386 }
2387
2388 sub parse_ip_or_cidr {
2389     my ($cidr) = @_;
2390
2391     my $ipversion;
2392
2393     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2394         $cidr =~ s|/128$||;
2395         $ipversion = 6;
2396     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2397         $cidr =~ s|/32$||;
2398         $ipversion = 4;
2399     } else {
2400         die "value does not look like a valid IP address or CIDR network\n";
2401     }
2402
2403     return wantarray ? ($cidr, $ipversion) : $cidr;
2404 }
2405
2406 sub parse_alias {
2407     my ($line) = @_;
2408
2409     # we can add single line comments to the end of the line
2410     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2411
2412     if ($line =~ m/^(\S+)\s(\S+)$/) {
2413         my ($name, $cidr) = ($1, $2);
2414         my $ipversion;
2415
2416         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2417
2418         my $data = {
2419             name => $name,
2420             cidr => $cidr,
2421             ipversion => $ipversion,
2422         };
2423         $data->{comment} = $comment  if $comment;
2424         return $data;
2425     }
2426
2427     return undef;
2428 }
2429
2430 sub generic_fw_config_parser {
2431     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2432
2433     my $section;
2434     my $group;
2435
2436     my $res = $empty_conf;
2437
2438     while (defined(my $line = <$fh>)) {
2439         next if $line =~ m/^#/;
2440         next if $line =~ m/^\s*$/;
2441
2442         chomp $line;
2443
2444         my $linenr = $fh->input_line_number();
2445         my $prefix = "$filename (line $linenr)";
2446
2447         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2448             $section = 'options';
2449             next;
2450         }
2451
2452         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2453             $section = 'aliases';
2454             next;
2455         }
2456
2457         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2458             $section = 'groups';
2459             $group = lc($1);
2460             my $comment = $2;
2461             eval {
2462                 die "security group name too long\n" if length($group) > $max_group_name_length;
2463                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2464             };
2465             if (my $err = $@) {
2466                 ($section, $group, $comment) = undef;
2467                 warn "$prefix: $err";
2468                 next;
2469             }
2470
2471             $res->{$section}->{$group} = [];
2472             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2473                 if $comment;
2474             next;
2475         }
2476
2477         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2478             $section = 'rules';
2479             next;
2480         }
2481
2482         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2483             $section = 'ipset';
2484             $group = lc($1);
2485             my $comment = $2;
2486             eval {
2487                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2488                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2489             };
2490             if (my $err = $@) {
2491                 ($section, $group, $comment) = undef;
2492                 warn "$prefix: $err";
2493                 next;
2494             }
2495
2496             $res->{$section}->{$group} = [];
2497             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2498                 if $comment;
2499             next;
2500         }
2501
2502         if (!$section) {
2503             warn "$prefix: skip line - no section\n";
2504             next;
2505         }
2506
2507         if ($section eq 'options') {
2508             eval {
2509                 my ($opt, $value);
2510                 if ($rule_env eq 'cluster') {
2511                     ($opt, $value) = parse_clusterfw_option($line);
2512                 } elsif ($rule_env eq 'host') {
2513                     ($opt, $value) = parse_hostfw_option($line);
2514                 } else {
2515                     ($opt, $value) = parse_vmfw_option($line);
2516                 }
2517                 $res->{options}->{$opt} = $value;
2518             };
2519             warn "$prefix: $@" if $@;
2520         } elsif ($section eq 'aliases') {
2521             eval {
2522                 my $data = parse_alias($line);
2523                 $res->{aliases}->{lc($data->{name})} = $data;
2524             };
2525             warn "$prefix: $@" if $@;
2526         } elsif ($section eq 'rules') {
2527             my $rule;
2528             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2529             if (my $err = $@) {
2530                 warn "$prefix: $err";
2531                 next;
2532             }
2533             push @{$res->{$section}}, $rule;
2534         } elsif ($section eq 'groups') {
2535             my $rule;
2536             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2537             if (my $err = $@) {
2538                 warn "$prefix: $err";
2539                 next;
2540             }
2541             push @{$res->{$section}->{$group}}, $rule;
2542         } elsif ($section eq 'ipset') {
2543             # we can add single line comments to the end of the rule
2544             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2545
2546             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2547             my $nomatch = $1;
2548             my $cidr = $2;
2549             my $errors;
2550
2551             if ($nomatch && !$feature_ipset_nomatch) {
2552                 $errors->{nomatch} = "nomatch not supported by kernel";
2553             }
2554
2555             eval {
2556                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2557                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2558                 } else {
2559                     $cidr = parse_ip_or_cidr($cidr);
2560                 }
2561             };
2562             if (my $err = $@) {
2563                 chomp $err;
2564                 $errors->{cidr} = $err;
2565             }
2566
2567             my $entry = { cidr => $cidr };
2568             $entry->{nomatch} = 1 if $nomatch;
2569             $entry->{comment} = $comment if $comment;
2570             $entry->{errors} =  $errors if $errors;
2571
2572             if ($verbose && $errors) {
2573                 warn "$prefix - errors in ipset '$group': $line\n";
2574                 foreach my $p (keys %{$errors}) {
2575                     warn "  $p: $errors->{$p}\n";
2576                 }
2577             }
2578
2579             push @{$res->{$section}->{$group}}, $entry;
2580         } else {
2581             warn "$prefix: skip line - unknown section\n";
2582             next;
2583         }
2584     }
2585
2586     return $res;
2587 }
2588
2589 sub parse_hostfw_config {
2590     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2591
2592     my $empty_conf = { rules => [], options => {}};
2593
2594     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2595 }
2596
2597 sub parse_vmfw_config {
2598     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2599
2600     my $empty_conf = {
2601         rules => [],
2602         options => {},
2603         aliases => {},
2604         ipset => {} ,
2605         ipset_comments => {},
2606     };
2607
2608     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2609 }
2610
2611 sub parse_clusterfw_config {
2612     my ($filename, $fh, $verbose) = @_;
2613
2614     my $section;
2615     my $group;
2616
2617     my $empty_conf = {
2618         rules => [],
2619         options => {},
2620         aliases => {},
2621         groups => {},
2622         group_comments => {},
2623         ipset => {} ,
2624         ipset_comments => {},
2625     };
2626
2627     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2628 }
2629
2630 sub run_locked {
2631     my ($code, @param) = @_;
2632
2633     my $timeout = 10;
2634
2635     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2636
2637     die $@ if $@;
2638
2639     return $res;
2640 }
2641
2642 sub read_local_vm_config {
2643
2644     my $openvz = {};
2645     my $qemu = {};
2646
2647     my $vmdata = { openvz => $openvz, qemu => $qemu };
2648
2649     my $vmlist = PVE::Cluster::get_vmlist();
2650     return $vmdata if !$vmlist || !$vmlist->{ids};
2651     my $ids = $vmlist->{ids};
2652
2653     foreach my $vmid (keys %$ids) {
2654         next if !$vmid; # skip VE0
2655         my $d = $ids->{$vmid};
2656         next if !$d->{node} || $d->{node} ne $nodename;
2657         next if !$d->{type};
2658         if ($d->{type} eq 'openvz') {
2659             if ($have_pve_manager) {
2660                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2661                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2662                     $openvz->{$vmid} = $conf;
2663                 }
2664             }
2665         } elsif ($d->{type} eq 'qemu') {
2666             if ($have_qemu_server) {
2667                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2668                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2669                     $qemu->{$vmid} = $conf;
2670                 }
2671             }
2672         }
2673     }
2674
2675     return $vmdata;
2676 };
2677
2678 sub load_vmfw_conf {
2679     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2680
2681     my $vmfw_conf = {};
2682
2683     $dir = $pvefw_conf_dir if !defined($dir);
2684
2685     my $filename = "$dir/$vmid.fw";
2686     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2687         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2688         $vmfw_conf->{vmid} = $vmid;
2689     }
2690
2691     return $vmfw_conf;
2692 }
2693
2694 my $format_rules = sub {
2695     my ($rules, $allow_iface) = @_;
2696
2697     my $raw = '';
2698
2699     foreach my $rule (@$rules) {
2700         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2701             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2702             $raw .= uc($rule->{type});
2703             if ($rule->{macro}) {
2704                 $raw .= " $rule->{macro}($rule->{action})";
2705             } else {
2706                 $raw .= " " . $rule->{action};
2707             }
2708             if ($allow_iface && $rule->{iface}) {
2709                 $raw .= " -i $rule->{iface}";
2710             }
2711
2712             if ($rule->{type} ne  'group')  {
2713                 $raw .= " -source $rule->{source}" if $rule->{source};
2714                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2715                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2716                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2717                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2718             }
2719
2720             $raw .= " # " . encode('utf8', $rule->{comment})
2721                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2722             $raw .= "\n";
2723         } else {
2724             die "unknown rule type '$rule->{type}'";
2725         }
2726     }
2727
2728     return $raw;
2729 };
2730
2731 my $format_options = sub {
2732     my ($options) = @_;
2733
2734     my $raw = '';
2735
2736     $raw .= "[OPTIONS]\n\n";
2737     foreach my $opt (keys %$options) {
2738         $raw .= "$opt: $options->{$opt}\n";
2739     }
2740     $raw .= "\n";
2741
2742     return $raw;
2743 };
2744
2745 my $format_aliases = sub {
2746     my ($aliases) = @_;
2747
2748     my $raw = '';
2749
2750     $raw .= "[ALIASES]\n\n";
2751     foreach my $k (keys %$aliases) {
2752         my $e = $aliases->{$k};
2753         $raw .= "$e->{name} $e->{cidr}";
2754         $raw .= " # " . encode('utf8', $e->{comment})
2755             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2756         $raw .= "\n";
2757     }
2758     $raw .= "\n";
2759
2760     return $raw;
2761 };
2762
2763 my $format_ipsets = sub {
2764     my ($fw_conf) = @_;
2765
2766     my $raw = '';
2767
2768     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2769         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2770             my $utf8comment = encode('utf8', $comment);
2771             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2772         } else {
2773             $raw .= "[IPSET $ipset]\n\n";
2774         }
2775         my $options = $fw_conf->{ipset}->{$ipset};
2776
2777         my $nethash = {};
2778         foreach my $entry (@$options) {
2779             $nethash->{$entry->{cidr}} = $entry;
2780         }
2781
2782         foreach my $cidr (sort keys %$nethash) {
2783             my $entry = $nethash->{$cidr};
2784             my $line = $entry->{nomatch} ? '!' : '';
2785             $line .= $entry->{cidr};
2786             $line .= " # " . encode('utf8', $entry->{comment})
2787                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2788             $raw .= "$line\n";
2789         }
2790
2791         $raw .= "\n";
2792     }
2793
2794     return $raw;
2795 };
2796
2797 sub save_vmfw_conf {
2798     my ($vmid, $vmfw_conf) = @_;
2799
2800     my $raw = '';
2801
2802     my $options = $vmfw_conf->{options};
2803     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2804
2805     my $aliases = $vmfw_conf->{aliases};
2806     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2807
2808     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2809
2810     my $rules = $vmfw_conf->{rules} || [];
2811     if ($rules && scalar(@$rules)) {
2812         $raw .= "[RULES]\n\n";
2813         $raw .= &$format_rules($rules, 1);
2814         $raw .= "\n";
2815     }
2816
2817     mkdir $pvefw_conf_dir;
2818
2819     my $filename = "$pvefw_conf_dir/$vmid.fw";
2820     PVE::Tools::file_set_contents($filename, $raw);
2821 }
2822
2823 sub read_vm_firewall_configs {
2824     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2825
2826     my $vmfw_configs = {};
2827
2828     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2829         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2830         next if !$vmfw_conf->{options}; # skip if file does not exists
2831         $vmfw_configs->{$vmid} = $vmfw_conf;
2832     }
2833     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2834         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2835         next if !$vmfw_conf->{options}; # skip if file does not exists
2836         $vmfw_configs->{$vmid} = $vmfw_conf;
2837     }
2838
2839     return $vmfw_configs;
2840 }
2841
2842 sub get_option_log_level {
2843     my ($options, $k) = @_;
2844
2845     my $v = $options->{$k};
2846     $v = $default_log_level if !defined($v);
2847
2848     return undef if $v eq '' || $v eq 'nolog';
2849
2850     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2851
2852     return $v if ($v >= 0) && ($v <= 7);
2853
2854     warn "unknown log level ($k = '$v')\n";
2855
2856     return undef;
2857 }
2858
2859 sub generate_std_chains {
2860     my ($ruleset, $options, $ipversion) = @_;
2861
2862     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2863
2864     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2865
2866     my $chain;
2867
2868     if ($ipversion == 4) {
2869         # same as shorewall smurflog.
2870         $chain = 'PVEFW-smurflog';
2871         $std_chains->{$chain} = [];
2872
2873         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2874         push @{$std_chains->{$chain}}, "-j DROP";
2875     }
2876
2877     # same as shorewall logflags action.
2878     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2879     $chain = 'PVEFW-logflags';
2880     $std_chains->{$chain} = [];
2881
2882     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2883     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2884     push @{$std_chains->{$chain}}, "-j DROP";
2885
2886     foreach my $chain (keys %$std_chains) {
2887         ruleset_create_chain($ruleset, $chain);
2888         foreach my $rule (@{$std_chains->{$chain}}) {
2889             if (ref($rule)) {
2890                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2891             } else {
2892                 ruleset_addrule($ruleset, $chain, $rule);
2893             }
2894         }
2895     }
2896 }
2897
2898 sub generate_ipset_chains {
2899     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2900
2901     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2902
2903         my $options = $fw_conf->{ipset}->{$ipset};
2904
2905         # remove duplicates
2906         my $nethash = {};
2907         foreach my $entry (@$options) {
2908             next if $entry->{errors}; # skip entries with errors
2909             eval {
2910                 my ($cidr, $ver);
2911                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2912                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2913                 } else {
2914                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2915                 }
2916                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2917                 if ($ver == 6) {
2918                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2919                     $cidr = inet_ntop(AF_INET6, $ipv6);
2920                     $cidr =~ s|/128$||;
2921                 } else {
2922                     $cidr =~ s|/32$||;
2923                 }
2924
2925                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2926             };
2927             warn $@ if $@;
2928         }
2929
2930         foreach my $ipversion (4, 6) {
2931             my $data = $nethash->{$ipversion};
2932
2933             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2934
2935             my $hashsize = scalar(@$options);
2936             if ($hashsize <= 64) {
2937                 $hashsize = 64;
2938             } else {
2939                 $hashsize = round_powerof2($hashsize);
2940             }
2941
2942             my $family = $ipversion == "6" ? "inet6" : "inet";
2943
2944             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2945
2946             foreach my $cidr (sort keys %$data) {
2947                 my $entry = $data->{$cidr};
2948
2949                 my $cmd = "add $name $cidr";
2950                 if ($entry->{nomatch}) {
2951                     if ($feature_ipset_nomatch) {
2952                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2953                     } else {
2954                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2955                     }
2956                 } else {
2957                     push @{$ipset_ruleset->{$name}}, $cmd;
2958                 }
2959             }
2960         }
2961     }
2962 }
2963
2964 sub round_powerof2 {
2965     my ($int) = @_;
2966
2967     $int--;
2968     $int |= $int >> $_ foreach (1,2,4,8,16);
2969     return ++$int;
2970 }
2971
2972 sub load_clusterfw_conf {
2973     my ($filename, $verbose) = @_;
2974
2975     $filename = $clusterfw_conf_filename if !defined($filename);
2976
2977     my $cluster_conf = {};
2978     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2979         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2980     }
2981
2982     return $cluster_conf;
2983 }
2984
2985 sub save_clusterfw_conf {
2986     my ($cluster_conf) = @_;
2987
2988     my $raw = '';
2989
2990     my $options = $cluster_conf->{options};
2991     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2992
2993     my $aliases = $cluster_conf->{aliases};
2994     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2995
2996     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2997
2998     my $rules = $cluster_conf->{rules};
2999     if ($rules && scalar(@$rules)) {
3000         $raw .= "[RULES]\n\n";
3001         $raw .= &$format_rules($rules, 1);
3002         $raw .= "\n";
3003     }
3004
3005     if ($cluster_conf->{groups}) {
3006         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3007             my $rules = $cluster_conf->{groups}->{$group};
3008             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3009                 my $utf8comment = encode('utf8', $comment);
3010                 $raw .= "[group $group] # $utf8comment\n\n";
3011             } else {
3012                 $raw .= "[group $group]\n\n";
3013             }
3014
3015             $raw .= &$format_rules($rules, 0);
3016             $raw .= "\n";
3017         }
3018     }
3019
3020     mkdir $pvefw_conf_dir;
3021     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3022 }
3023
3024 sub load_hostfw_conf {
3025     my ($cluster_conf, $filename, $verbose) = @_;
3026
3027     $filename = $hostfw_conf_filename if !defined($filename);
3028
3029     my $hostfw_conf = {};
3030     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3031         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3032     }
3033     return $hostfw_conf;
3034 }
3035
3036 sub save_hostfw_conf {
3037     my ($hostfw_conf) = @_;
3038
3039     my $raw = '';
3040
3041     my $options = $hostfw_conf->{options};
3042     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3043
3044     my $rules = $hostfw_conf->{rules};
3045     if ($rules && scalar(@$rules)) {
3046         $raw .= "[RULES]\n\n";
3047         $raw .= &$format_rules($rules, 1);
3048         $raw .= "\n";
3049     }
3050
3051     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3052 }
3053
3054 sub compile {
3055     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3056
3057     my $vmfw_configs;
3058
3059     if ($vmdata) { # test mode
3060         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3061         my $filename = "$testdir/cluster.fw";
3062         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3063
3064         $filename = "$testdir/host.fw";
3065         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3066
3067         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3068     } else { # normal operation
3069         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3070
3071         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3072
3073         $vmdata = read_local_vm_config();
3074         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3075     }
3076
3077     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3078     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3079
3080     return ($ruleset, $ipset_ruleset, $rulesetv6);
3081 }
3082
3083 sub compile_iptables_filter {
3084     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3085
3086     $cluster_conf->{ipset}->{venet0} = [];
3087     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3088
3089     my $localnet;
3090     if ($cluster_conf->{aliases}->{local_network}) {
3091         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3092     } else {
3093         my $localnet_ver;
3094         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3095
3096         $cluster_conf->{aliases}->{local_network} = {
3097             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3098     }
3099
3100     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3101
3102     return ({}, {}) if !$cluster_conf->{options}->{enable};
3103
3104     my $ruleset = {};
3105
3106     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3107     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3108
3109     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3110
3111     my $hostfw_options = $hostfw_conf->{options} || {};
3112
3113     # fixme: what log level should we use here?
3114     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3115
3116     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3117
3118
3119     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3120     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3121     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3122
3123     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3124     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3125
3126     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3127
3128     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3129     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3130
3131     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3132     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3133
3134     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3135
3136     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3137
3138     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3139
3140     my $ipset_ruleset = {};
3141
3142     if ($hostfw_enable) {
3143         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3144         warn $@ if $@; # just to be sure - should not happen
3145     }
3146
3147     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3148
3149     # generate firewall rules for QEMU VMs
3150     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3151         eval {
3152             my $conf = $vmdata->{qemu}->{$vmid};
3153             my $vmfw_conf = $vmfw_configs->{$vmid};
3154             return if !$vmfw_conf;
3155
3156             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3157
3158             foreach my $netid (keys %$conf) {
3159                 next if $netid !~ m/^net(\d+)$/;
3160                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3161                 next if !$net->{firewall};
3162                 my $iface = "tap${vmid}i$1";
3163
3164                 my $macaddr = $net->{macaddr};
3165                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3166                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3167                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3168                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3169             }
3170         };
3171         warn $@ if $@; # just to be sure - should not happen
3172     }
3173
3174     # generate firewall rules for OpenVZ containers
3175     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3176         eval {
3177             my $conf = $vmdata->{openvz}->{$vmid};
3178
3179             my $vmfw_conf = $vmfw_configs->{$vmid};
3180             return if !$vmfw_conf;
3181
3182             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3183
3184             if ($vmfw_conf->{options}->{enable}) {
3185                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3186                     my $ip = $conf->{ip_address}->{value};
3187                     $ip =~ s/\s+/,/g;
3188
3189                     my @ips = ();
3190
3191                     foreach my $singleip (split(',', $ip)) {
3192                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3193                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3194                         push @ips, $singleip if $singleip_ver == $ipversion;
3195                     }
3196
3197                     if (scalar(@ips)) {
3198                         my $ip_list = join(',', @ips);
3199                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3200                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3201                     }
3202                 }
3203             }
3204
3205             if ($conf->{netif} && $conf->{netif}->{value}) {
3206                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3207                 foreach my $netid (keys %$netif) {
3208                     my $d = $netif->{$netid};
3209                     my $bridge = $d->{bridge};
3210                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3211                     my $macaddr = $d->{mac};
3212                     my $iface = $d->{host_ifname};
3213                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3214                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3215                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3216                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3217                 }
3218             }
3219         };
3220         warn $@ if $@; # just to be sure - should not happen
3221     }
3222
3223     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3224         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3225     }
3226
3227     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3228
3229     return ($ruleset, $ipset_ruleset);
3230 }
3231
3232 sub get_ruleset_status {
3233     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3234
3235     my $statushash = {};
3236
3237     foreach my $chain (sort keys %$ruleset) {
3238         my $sig = &$digest_fn($ruleset->{$chain});
3239
3240         $statushash->{$chain}->{sig} = $sig;
3241
3242         my $oldsig = $active_chains->{$chain};
3243         if (!defined($oldsig)) {
3244             $statushash->{$chain}->{action} = 'create';
3245         } else {
3246             if ($oldsig eq $sig) {
3247                 $statushash->{$chain}->{action} = 'exists';
3248             } else {
3249                 $statushash->{$chain}->{action} = 'update';
3250             }
3251         }
3252         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3253         foreach my $cmd (@{$ruleset->{$chain}}) {
3254             print "\t$cmd\n" if $verbose;
3255         }
3256     }
3257
3258     foreach my $chain (sort keys %$active_chains) {
3259         if (!defined($ruleset->{$chain})) {
3260             my $sig = $active_chains->{$chain};
3261             $statushash->{$chain}->{action} = 'delete';
3262             $statushash->{$chain}->{sig} = $sig;
3263             print "delete $chain ($sig)\n" if $verbose;
3264         }
3265     }
3266
3267     return $statushash;
3268 }
3269
3270 sub print_sig_rule {
3271     my ($chain, $sig) = @_;
3272
3273     # We just use this to store a SHA1 checksum used to detect changes
3274     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3275 }
3276
3277 sub get_ruleset_cmdlist {
3278     my ($ruleset, $verbose, $iptablescmd) = @_;
3279
3280     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3281
3282     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3283     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3284
3285     # create missing chains first
3286     foreach my $chain (sort keys %$ruleset) {
3287         my $stat = $statushash->{$chain};
3288         die "internal error" if !$stat;
3289         next if $stat->{action} ne 'create';
3290
3291         $cmdlist .= ":$chain - [0:0]\n";
3292     }
3293
3294     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3295         my $chain = "PVEFW-$h";
3296         if ($ruleset->{$chain} && !$hooks->{$h}) {
3297             $cmdlist .= "-A $h -j $chain\n";
3298         }
3299     }
3300
3301     foreach my $chain (sort keys %$ruleset) {
3302         my $stat = $statushash->{$chain};
3303         die "internal error" if !$stat;
3304
3305         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3306             $cmdlist .= "-F $chain\n";
3307             foreach my $cmd (@{$ruleset->{$chain}}) {
3308                 $cmdlist .= "$cmd\n";
3309             }
3310             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3311         } elsif ($stat->{action} eq 'delete') {
3312             die "internal error"; # this should not happen
3313         } elsif ($stat->{action} eq 'exists') {
3314             # do nothing
3315         } else {
3316             die "internal error - unknown status '$stat->{action}'";
3317         }
3318     }
3319
3320     foreach my $chain (keys %$statushash) {
3321         next if $statushash->{$chain}->{action} ne 'delete';
3322         $cmdlist .= "-F $chain\n";
3323     }
3324     foreach my $chain (keys %$statushash) {
3325         next if $statushash->{$chain}->{action} ne 'delete';
3326         next if $chain eq 'PVEFW-INPUT';
3327         next if $chain eq 'PVEFW-OUTPUT';
3328         next if $chain eq 'PVEFW-FORWARD';
3329         $cmdlist .= "-X $chain\n";
3330     }
3331
3332     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3333
3334     $cmdlist .= "COMMIT\n";
3335
3336     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3337 }
3338
3339 sub get_ipset_cmdlist {
3340     my ($ruleset, $verbose) = @_;
3341
3342     my $cmdlist = "";
3343
3344     my $delete_cmdlist = "";
3345
3346     my $active_chains = ipset_get_chains();
3347     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3348
3349     # remove stale _swap chains
3350     foreach my $chain (keys %$active_chains) {
3351         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3352             $cmdlist .= "destroy $chain\n";
3353         }
3354     }
3355
3356     foreach my $chain (keys %$ruleset) {
3357         my $stat = $statushash->{$chain};
3358         die "internal error" if !$stat;
3359
3360         if ($stat->{action} eq 'create') {
3361             foreach my $cmd (@{$ruleset->{$chain}}) {
3362                 $cmdlist .= "$cmd\n";
3363             }
3364         }
3365     }
3366
3367     foreach my $chain (keys %$ruleset) {
3368         my $stat = $statushash->{$chain};
3369         die "internal error" if !$stat;
3370
3371         if ($stat->{action} eq 'update') {
3372             my $chain_swap = $chain."_swap";
3373
3374             foreach my $cmd (@{$ruleset->{$chain}}) {
3375                 $cmd =~ s/$chain/$chain_swap/;
3376                 $cmdlist .= "$cmd\n";
3377             }
3378             $cmdlist .= "swap $chain_swap $chain\n";
3379             $cmdlist .= "flush $chain_swap\n";
3380             $cmdlist .= "destroy $chain_swap\n";
3381         }
3382     }
3383
3384      # the remove unused chains
3385     foreach my $chain (keys %$statushash) {
3386         next if $statushash->{$chain}->{action} ne 'delete';
3387
3388         $delete_cmdlist .= "flush $chain\n";
3389         $delete_cmdlist .= "destroy $chain\n";
3390     }
3391
3392     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3393
3394     return ($cmdlist, $delete_cmdlist, $changes);
3395 }
3396
3397 sub apply_ruleset {
3398     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3399
3400     enable_bridge_firewall();
3401
3402     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3403         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3404
3405     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3406     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3407
3408     if ($verbose) {
3409         if ($ipset_changes) {
3410             print "ipset changes:\n";
3411             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3412             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3413         }
3414
3415         if ($changes) {
3416             print "iptables changes:\n";
3417             print $cmdlist;
3418         }
3419
3420         if ($changesv6) {
3421             print "ip6tables changes:\n";
3422             print $cmdlistv6;
3423         }
3424     }
3425
3426     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3427     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3428
3429     ipset_restore_cmdlist($ipset_create_cmdlist);
3430
3431     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3432     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3433
3434     iptables_restore_cmdlist($cmdlist);
3435
3436     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3437     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3438
3439     ip6tables_restore_cmdlist($cmdlistv6);
3440
3441     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3442     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3443
3444     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3445
3446     # test: re-read status and check if everything is up to date
3447     my $active_chains = iptables_get_chains();
3448     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3449
3450     my $errors;
3451     foreach my $chain (sort keys %$ruleset) {
3452         my $stat = $statushash->{$chain};
3453         if ($stat->{action} ne 'exists') {
3454             warn "unable to update chain '$chain'\n";
3455             $errors = 1;
3456         }
3457     }
3458
3459     my $active_chainsv6 = iptables_get_chains("ip6tables");
3460     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3461
3462     foreach my $chain (sort keys %$rulesetv6) {
3463         my $stat = $statushashv6->{$chain};
3464         if ($stat->{action} ne 'exists') {
3465             warn "unable to update chain '$chain'\n";
3466             $errors = 1;
3467         }
3468     }
3469
3470     die "unable to apply firewall changes\n" if $errors;
3471
3472     update_nf_conntrack_max($hostfw_conf);
3473
3474     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3475
3476 }
3477
3478 sub update_nf_conntrack_max {
3479     my ($hostfw_conf) = @_;
3480
3481     my $max = 65536; # reasonable default
3482
3483     my $options = $hostfw_conf->{options} || {};
3484
3485     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3486         $max = $options->{nf_conntrack_max};
3487         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3488     }
3489
3490     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3491     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3492
3493     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3494
3495     if ($current != $max) {
3496         my $hashsize = int($max/4);
3497         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3498         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3499     }
3500 }
3501
3502 sub update_nf_conntrack_tcp_timeout_established {
3503     my ($hostfw_conf) = @_;
3504
3505     my $options = $hostfw_conf->{options} || {};
3506
3507     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3508
3509     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3510 }
3511
3512 sub remove_pvefw_chains {
3513
3514     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3515     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3516     PVE::Firewall::remove_pvefw_chains_ipset();
3517
3518 }
3519
3520 sub remove_pvefw_chains_iptables {
3521     my ($iptablescmd) = @_;
3522
3523     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3524     my $cmdlist = "*filter\n";
3525
3526     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3527         if ($hooks->{$h}) {
3528             $cmdlist .= "-D $h -j PVEFW-$h\n";
3529         }
3530     }
3531
3532     foreach my $chain (keys %$chash) {
3533         $cmdlist .= "-F $chain\n";
3534     }
3535
3536     foreach my $chain (keys %$chash) {
3537         $cmdlist .= "-X $chain\n";
3538     }
3539     $cmdlist .= "COMMIT\n";
3540
3541     if($iptablescmd eq "ip6tables") {
3542         ip6tables_restore_cmdlist($cmdlist);
3543     } else {
3544         iptables_restore_cmdlist($cmdlist);
3545     }
3546 }
3547
3548 sub remove_pvefw_chains_ipset {
3549
3550     my $ipset_chains = ipset_get_chains();
3551
3552     my $cmdlist = "";
3553
3554     foreach my $chain (keys %$ipset_chains) {
3555         $cmdlist .= "flush $chain\n";
3556         $cmdlist .= "destroy $chain\n";
3557     }
3558
3559     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3560 }
3561
3562 sub init {
3563     my $cluster_conf = load_clusterfw_conf();
3564     my $cluster_options = $cluster_conf->{options};
3565     my $enable = $cluster_options->{enable};
3566
3567     return if !$enable;
3568
3569     # load required modules here
3570 }
3571
3572 sub update {
3573     my $code = sub {
3574
3575         my $cluster_conf = load_clusterfw_conf();
3576         my $cluster_options = $cluster_conf->{options};
3577
3578         if (!$cluster_options->{enable}) {
3579             PVE::Firewall::remove_pvefw_chains();
3580             return;
3581         }
3582
3583         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3584
3585         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3586
3587         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3588     };
3589
3590     run_locked($code);
3591 }
3592
3593 1;