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     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 145     ],
 146     'DHCPv6' => [
 147         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 148     ],
 149     'Trcrt' => [
 150         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 151         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 152     ],
 153  };
 154
 155 # imported/converted from: /usr/share/shorewall/macro.*
 156 my $pve_fw_macros = {
 157     'Amanda' => [
 158         "Amanda Backup",
 159         { action => 'PARAM', proto => 'udp', dport => '10080' },
 160         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 161     ],
 162     'Auth' => [
 163         "Auth (identd) traffic",
 164         { action => 'PARAM', proto => 'tcp', dport => '113' },
 165     ],
 166     'BGP' => [
 167         "Border Gateway Protocol traffic",
 168         { action => 'PARAM', proto => 'tcp', dport => '179' },
 169     ],
 170     'BitTorrent' => [
 171         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 172         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 173         { action => 'PARAM', proto => 'udp', dport => '6881' },
 174     ],
 175     'BitTorrent32' => [
 176         "BitTorrent traffic for BitTorrent 3.2 and later",
 177         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 178         { action => 'PARAM', proto => 'udp', dport => '6881' },
 179     ],
 180     'CVS' => [
 181         "Concurrent Versions System pserver traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 183     ],
 184     'Citrix' => [
 185         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 186         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 187         { action => 'PARAM', proto => 'udp', dport => '1604' },
 188         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 189     ],
 190     'DAAP' => [
 191         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 192         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 193         { action => 'PARAM', proto => 'udp', dport => '3689' },
 194     ],
 195     'DCC' => [
 196         "Distributed Checksum Clearinghouse spam filtering mechanism",
 197         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 198     ],
 199     'DHCPfwd' => [
 200         "Forwarded DHCP traffic",
 201         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 202     ],
 203     'DNS' => [
 204         "Domain Name System traffic (upd and tcp)",
 205         { action => 'PARAM', proto => 'udp', dport => '53' },
 206         { action => 'PARAM', proto => 'tcp', dport => '53' },
 207     ],
 208     'Distcc' => [
 209         "Distributed Compiler service",
 210         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 211     ],
 212     'FTP' => [
 213         "File Transfer Protocol",
 214         { action => 'PARAM', proto => 'tcp', dport => '21' },
 215     ],
 216     'Finger' => [
 217         "Finger protocol (RFC 742)",
 218         { action => 'PARAM', proto => 'tcp', dport => '79' },
 219     ],
 220     'GNUnet' => [
 221         "GNUnet secure peer-to-peer networking traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 223         { action => 'PARAM', proto => 'udp', dport => '2086' },
 224         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 225         { action => 'PARAM', proto => 'udp', dport => '1080' },
 226     ],
 227     'GRE' => [
 228         "Generic Routing Encapsulation tunneling protocol",
 229         { action => 'PARAM', proto => '47' },
 230     ],
 231     'Git' => [
 232         "Git distributed revision control traffic",
 233         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 234     ],
 235     'HKP' => [
 236         "OpenPGP HTTP keyserver protocol traffic",
 237         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 238     ],
 239     'HTTP' => [
 240         "Hypertext Transfer Protocol (WWW)",
 241         { action => 'PARAM', proto => 'tcp', dport => '80' },
 242     ],
 243     'HTTPS' => [
 244         "Hypertext Transfer Protocol (WWW) over SSL",
 245         { action => 'PARAM', proto => 'tcp', dport => '443' },
 246     ],
 247     'ICPV2' => [
 248         "Internet Cache Protocol V2 (Squid) traffic",
 249         { action => 'PARAM', proto => 'udp', dport => '3130' },
 250     ],
 251     'ICQ' => [
 252         "AOL Instant Messenger traffic",
 253         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 254     ],
 255     'IMAP' => [
 256         "Internet Message Access Protocol",
 257         { action => 'PARAM', proto => 'tcp', dport => '143' },
 258     ],
 259     'IMAPS' => [
 260         "Internet Message Access Protocol over SSL",
 261         { action => 'PARAM', proto => 'tcp', dport => '993' },
 262     ],
 263     'IPIP' => [
 264         "IPIP capsulation traffic",
 265         { action => 'PARAM', proto => '94' },
 266     ],
 267     'IPsec' => [
 268         "IPsec traffic",
 269         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 270         { action => 'PARAM', proto => '50' },
 271     ],
 272     'IPsecah' => [
 273         "IPsec authentication (AH) traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 275         { action => 'PARAM', proto => '51' },
 276     ],
 277     'IPsecnat' => [
 278         "IPsec traffic and Nat-Traversal",
 279         { action => 'PARAM', proto => 'udp', dport => '500' },
 280         { action => 'PARAM', proto => 'udp', dport => '4500' },
 281         { action => 'PARAM', proto => '50' },
 282     ],
 283     'IRC' => [
 284         "Internet Relay Chat traffic",
 285         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 286     ],
 287     'Jetdirect' => [
 288         "HP Jetdirect printing",
 289         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 290     ],
 291     'L2TP' => [
 292         "Layer 2 Tunneling Protocol traffic",
 293         { action => 'PARAM', proto => 'udp', dport => '1701' },
 294     ],
 295     'LDAP' => [
 296         "Lightweight Directory Access Protocol traffic",
 297         { action => 'PARAM', proto => 'tcp', dport => '389' },
 298     ],
 299     'LDAPS' => [
 300         "Secure Lightweight Directory Access Protocol traffic",
 301         { action => 'PARAM', proto => 'tcp', dport => '636' },
 302     ],
 303     'MSNP' => [
 304         "Microsoft Notification Protocol",
 305         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 306     ],
 307     'MSSQL' => [
 308         "Microsoft SQL Server",
 309         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 310     ],
 311     'Mail' => [
 312         "Mail traffic (SMTP, SMTPS, Submission)",
 313         { action => 'PARAM', proto => 'tcp', dport => '25' },
 314         { action => 'PARAM', proto => 'tcp', dport => '465' },
 315         { action => 'PARAM', proto => 'tcp', dport => '587' },
 316     ],
 317     'Munin' => [
 318         "Munin networked resource monitoring traffic",
 319         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 320     ],
 321     'MySQL' => [
 322         "MySQL server",
 323         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 324     ],
 325     'NNTP' => [
 326         "NNTP traffic (Usenet).",
 327         { action => 'PARAM', proto => 'tcp', dport => '119' },
 328     ],
 329     'NNTPS' => [
 330         "Encrypted NNTP traffic (Usenet)",
 331         { action => 'PARAM', proto => 'tcp', dport => '563' },
 332     ],
 333     'NTP' => [
 334         "Network Time Protocol (ntpd)",
 335         { action => 'PARAM', proto => 'udp', dport => '123' },
 336     ],
 337     'OSPF' => [
 338         "OSPF multicast traffic",
 339         { action => 'PARAM', proto => '89' },
 340     ],
 341     'OpenVPN' => [
 342         "OpenVPN traffic",
 343         { action => 'PARAM', proto => 'udp', dport => '1194' },
 344     ],
 345     'PCA' => [
 346         "Symantec PCAnywere (tm)",
 347         { action => 'PARAM', proto => 'udp', dport => '5632' },
 348         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 349     ],
 350     'POP3' => [
 351         "POP3 traffic",
 352         { action => 'PARAM', proto => 'tcp', dport => '110' },
 353     ],
 354     'POP3S' => [
 355         "Encrypted POP3 traffic",
 356         { action => 'PARAM', proto => 'tcp', dport => '995' },
 357     ],
 358     'PPtP' => [
 359         "Point-to-Point Tunneling Protocol",
 360         { action => 'PARAM', proto => '47' },
 361         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 362     ],
 363     'Ping' => [
 364         "ICMP echo request",
 365         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 366     ],
 367     'PostgreSQL' => [
 368         "PostgreSQL server",
 369         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 370     ],
 371     'Printer' => [
 372         "Line Printer protocol printing",
 373         { action => 'PARAM', proto => 'tcp', dport => '515' },
 374     ],
 375     'RDP' => [
 376         "Microsoft Remote Desktop Protocol traffic",
 377         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 378     ],
 379     'RIP' => [
 380         "Routing Information Protocol (bidirectional)",
 381         { action => 'PARAM', proto => 'udp', dport => '520' },
 382     ],
 383     'RNDC' => [
 384         "BIND remote management protocol",
 385         { action => 'PARAM', proto => 'tcp', dport => '953' },
 386     ],
 387     'Razor' => [
 388         "Razor Antispam System",
 389         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 390     ],
 391     'Rdate' => [
 392         "Remote time retrieval (rdate)",
 393         { action => 'PARAM', proto => 'tcp', dport => '37' },
 394     ],
 395     'Rsync' => [
 396         "Rsync server",
 397         { action => 'PARAM', proto => 'tcp', dport => '873' },
 398     ],
 399     'SANE' => [
 400         "SANE network scanning",
 401         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 402     ],
 403     'SMB' => [
 404         "Microsoft SMB traffic",
 405         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 406         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 407         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 408         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 409     ],
 410     'SMBswat' => [
 411         "Samba Web Administration Tool",
 412         { action => 'PARAM', proto => 'tcp', dport => '901' },
 413     ],
 414     'SMTP' => [
 415         "Simple Mail Transfer Protocol",
 416         { action => 'PARAM', proto => 'tcp', dport => '25' },
 417     ],
 418     'SMTPS' => [
 419         "Encrypted Simple Mail Transfer Protocol",
 420         { action => 'PARAM', proto => 'tcp', dport => '465' },
 421     ],
 422     'SNMP' => [
 423         "Simple Network Management Protocol",
 424         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 425         { action => 'PARAM', proto => 'tcp', dport => '161' },
 426     ],
 427     'SPAMD' => [
 428         "Spam Assassin SPAMD traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '783' },
 430     ],
 431     'SSH' => [
 432         "Secure shell traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '22' },
 434     ],
 435     'SVN' => [
 436         "Subversion server (svnserve)",
 437         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 438     ],
 439     'SixXS' => [
 440         "SixXS IPv6 Deployment and Tunnel Broker",
 441         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 442         { action => 'PARAM', proto => 'udp', dport => '3740' },
 443         { action => 'PARAM', proto => '41' },
 444         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 445     ],
 446     'Squid' => [
 447         "Squid web proxy traffic",
 448         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 449     ],
 450     'Submission' => [
 451         "Mail message submission traffic",
 452         { action => 'PARAM', proto => 'tcp', dport => '587' },
 453     ],
 454     'Syslog' => [
 455         "Syslog protocol (RFC 5424) traffic",
 456         { action => 'PARAM', proto => 'udp', dport => '514' },
 457         { action => 'PARAM', proto => 'tcp', dport => '514' },
 458     ],
 459     'TFTP' => [
 460         "Trivial File Transfer Protocol traffic",
 461         { action => 'PARAM', proto => 'udp', dport => '69' },
 462     ],
 463     'Telnet' => [
 464         "Telnet traffic",
 465         { action => 'PARAM', proto => 'tcp', dport => '23' },
 466     ],
 467     'Telnets' => [
 468         "Telnet over SSL",
 469         { action => 'PARAM', proto => 'tcp', dport => '992' },
 470     ],
 471     'Time' => [
 472         "RFC 868 Time protocol",
 473         { action => 'PARAM', proto => 'tcp', dport => '37' },
 474     ],
 475     'Trcrt' => [
 476         "Traceroute (for up to 30 hops) traffic",
 477         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 478         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 479     ],
 480     'VNC' => [
 481         "VNC traffic for VNC display's 0 - 99",
 482         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 483     ],
 484     'VNCL' => [
 485         "VNC traffic from Vncservers to Vncviewers in listen mode",
 486         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 487     ],
 488     'Web' => [
 489         "WWW traffic (HTTP and HTTPS)",
 490         { action => 'PARAM', proto => 'tcp', dport => '80' },
 491         { action => 'PARAM', proto => 'tcp', dport => '443' },
 492     ],
 493     'Webcache' => [
 494         "Web Cache/Proxy traffic (port 8080)",
 495         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 496     ],
 497     'Webmin' => [
 498         "Webmin traffic",
 499         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 500     ],
 501     'Whois' => [
 502         "Whois (nicname, RFC 3912) traffic",
 503         { action => 'PARAM', proto => 'tcp', dport => '43' },
 504     ],
 505 };
 506
 507 my $pve_fw_parsed_macros;
 508 my $pve_fw_macro_descr;
 509 my $pve_fw_preferred_macro_names = {};
 510
 511 my $pve_std_chains = {};
 512 $pve_std_chains->{4} = {
 513     'PVEFW-SET-ACCEPT-MARK' => [
 514         "-j MARK --set-mark 1",
 515     ],
 516     'PVEFW-DropBroadcast' => [
 517         # same as shorewall 'Broadcast'
 518         # simply DROP BROADCAST/MULTICAST/ANYCAST
 519         # we can use this to reduce logging
 520         { action => 'DROP', dsttype => 'BROADCAST' },
 521         { action => 'DROP', dsttype => 'MULTICAST' },
 522         { action => 'DROP', dsttype => 'ANYCAST' },
 523         { action => 'DROP', dest => '224.0.0.0/4' },
 524     ],
 525     'PVEFW-reject' => [
 526         # same as shorewall 'reject'
 527         { action => 'DROP', dsttype => 'BROADCAST' },
 528         { action => 'DROP', source => '224.0.0.0/4' },
 529         { action => 'DROP', proto => 'icmp' },
 530         "-p tcp -j REJECT --reject-with tcp-reset",
 531         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 532         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 533         "-j REJECT --reject-with icmp-host-prohibited",
 534     ],
 535     'PVEFW-Drop' => [
 536         # same as shorewall 'Drop', which is equal to DROP,
 537         # but REJECT/DROP some packages to reduce logging,
 538         # and ACCEPT critical ICMP types
 539         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 540         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 541         { action => 'PVEFW-DropBroadcast' },
 542         # ACCEPT critical ICMP types
 543         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 544         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 545         # Drop packets with INVALID state
 546         "-m conntrack --ctstate INVALID -j DROP",
 547         # Drop Microsoft SMB noise
 548         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 549         { action => 'DROP', proto => 'udp', dport => '137:139'},
 550         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 551         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 552         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 553         # Drop new/NotSyn traffic so that it doesn't get logged
 554         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 555         # Drop DNS replies
 556         { action => 'DROP', proto => 'udp', sport => 53 },
 557     ],
 558     'PVEFW-Reject' => [
 559         # same as shorewall 'Reject', which is equal to Reject,
 560         # but REJECT/DROP some packages to reduce logging,
 561         # and ACCEPT critical ICMP types
 562         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 563         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 564         { action => 'PVEFW-DropBroadcast' },
 565         # ACCEPT critical ICMP types
 566         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 567         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 568         # Drop packets with INVALID state
 569         "-m conntrack --ctstate INVALID -j DROP",
 570         # Drop Microsoft SMB noise
 571         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 572         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 574         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 575         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 576         # Drop new/NotSyn traffic so that it doesn't get logged
 577         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 578         # Drop DNS replies
 579         { action => 'DROP', proto => 'udp', sport => 53 },
 580     ],
 581     'PVEFW-tcpflags' => [
 582         # same as shorewall tcpflags action.
 583         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 584         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 585         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 586         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 588         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 589     ],
 590     'PVEFW-smurfs' => [
 591         # same as shorewall smurfs action
 592         # Filter packets for smurfs (packets with a broadcast address as the source).
 593         "-s 0.0.0.0/32 -j RETURN",
 594         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 595         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 596     ],
 597 };
 598
 599 $pve_std_chains->{6} = {
 600     'PVEFW-SET-ACCEPT-MARK' => [
 601         "-j MARK --set-mark 1",
 602     ],
 603     'PVEFW-DropBroadcast' => [
 604         # same as shorewall 'Broadcast'
 605         # simply DROP BROADCAST/MULTICAST/ANYCAST
 606         # we can use this to reduce logging
 607         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 608         # ipv6 addrtype does not work with kernel 2.6.32
 609         #{ action => 'DROP', dsttype => 'MULTICAST' },
 610         #{ action => 'DROP', dsttype => 'ANYCAST' },
 611         { action => 'DROP', dest => 'ff00::/8' },
 612         #{ action => 'DROP', dest => '224.0.0.0/4' },
 613     ],
 614     'PVEFW-reject' => [
 615         # same as shorewall 'reject'
 616         #{ action => 'DROP', dsttype => 'BROADCAST' },
 617         #{ action => 'DROP', source => '224.0.0.0/4' },
 618         { action => 'DROP', proto => 'icmpv6' },
 619         "-p tcp -j REJECT --reject-with tcp-reset",
 620         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 621         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 622         #"-j REJECT --reject-with icmp-host-prohibited",
 623     ],
 624     'PVEFW-Drop' => [
 625         # same as shorewall 'Drop', which is equal to DROP,
 626         # but REJECT/DROP some packages to reduce logging,
 627         # and ACCEPT critical ICMP types
 628         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 629         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 630         { action => 'PVEFW-DropBroadcast' },
 631         # ACCEPT critical ICMP types
 632         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 633         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 635
 636         # Drop packets with INVALID state
 637         "-m conntrack --ctstate INVALID -j DROP",
 638         # Drop Microsoft SMB noise
 639         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 640         { action => 'DROP', proto => 'udp', dport => '137:139'},
 641         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 642         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 643         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 644         # Drop new/NotSyn traffic so that it doesn't get logged
 645         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 646         # Drop DNS replies
 647         { action => 'DROP', proto => 'udp', sport => 53 },
 648     ],
 649     'PVEFW-Reject' => [
 650         # same as shorewall 'Reject', which is equal to Reject,
 651         # but REJECT/DROP some packages to reduce logging,
 652         # and ACCEPT critical ICMP types
 653         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 654         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 655         { action => 'PVEFW-DropBroadcast' },
 656         # ACCEPT critical ICMP types
 657         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 658         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 660
 661         # Drop packets with INVALID state
 662         "-m conntrack --ctstate INVALID -j DROP",
 663         # Drop Microsoft SMB noise
 664         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 665         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 667         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 668         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 669         # Drop new/NotSyn traffic so that it doesn't get logged
 670         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 671         # Drop DNS replies
 672         { action => 'DROP', proto => 'udp', sport => 53 },
 673     ],
 674     'PVEFW-tcpflags' => [
 675         # same as shorewall tcpflags action.
 676         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 677         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 678         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 679         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 681         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 682     ],
 683 };
 684
 685 # iptables -p icmp -h
 686 my $icmp_type_names = {
 687     any => 1,
 688     'echo-reply' => 1,
 689     'destination-unreachable' => 1,
 690     'network-unreachable' => 1,
 691     'host-unreachable' => 1,
 692     'protocol-unreachable' => 1,
 693     'port-unreachable' => 1,
 694     'fragmentation-needed' => 1,
 695     'source-route-failed' => 1,
 696     'network-unknown' => 1,
 697     'host-unknown' => 1,
 698     'network-prohibited' => 1,
 699     'host-prohibited' => 1,
 700     'TOS-network-unreachable' => 1,
 701     'TOS-host-unreachable' => 1,
 702     'communication-prohibited' => 1,
 703     'host-precedence-violation' => 1,
 704     'precedence-cutoff' => 1,
 705     'source-quench' => 1,
 706     'redirect' => 1,
 707     'network-redirect' => 1,
 708     'host-redirect' => 1,
 709     'TOS-network-redirect' => 1,
 710     'TOS-host-redirect' => 1,
 711     'echo-request' => 1,
 712     'router-advertisement' => 1,
 713     'router-solicitation' => 1,
 714     'time-exceeded' => 1,
 715     'ttl-zero-during-transit' => 1,
 716     'ttl-zero-during-reassembly' => 1,
 717     'parameter-problem' => 1,
 718     'ip-header-bad' => 1,
 719     'required-option-missing' => 1,
 720     'timestamp-request' => 1,
 721     'timestamp-reply' => 1,
 722     'address-mask-request' => 1,
 723     'address-mask-reply' => 1,
 724 };
 725
 726 # ip6tables -p icmpv6 -h
 727
 728 my $icmpv6_type_names = {
 729     'any' => 1,
 730     'destination-unreachable' => 1,
 731     'no-route' => 1,
 732     'communication-prohibited' => 1,
 733     'address-unreachable' => 1,
 734     'port-unreachable' => 1,
 735     'packet-too-big' => 1,
 736     'time-exceeded' => 1,
 737     'ttl-zero-during-transit' => 1,
 738     'ttl-zero-during-reassembly' => 1,
 739     'parameter-problem' => 1,
 740     'bad-header' => 1,
 741     'unknown-header-type' => 1,
 742     'unknown-option' => 1,
 743     'echo-request' => 1,
 744     'echo-reply' => 1,
 745     'router-solicitation' => 1,
 746     'router-advertisement' => 1,
 747     'neighbour-solicitation' => 1,
 748     'neighbour-advertisement' => 1,
 749     'redirect' => 1,
 750 };
 751
 752 sub init_firewall_macros {
 753
 754     $pve_fw_parsed_macros = {};
 755
 756     foreach my $k (keys %$pve_fw_macros) {
 757         my $lc_name = lc($k);
 758         my $macro = $pve_fw_macros->{$k};
 759         if (!ref($macro->[0])) {
 760             $pve_fw_macro_descr->{$k} = shift @$macro;
 761         }
 762         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 763         $pve_fw_parsed_macros->{$k} = $macro;
 764     }
 765 }
 766
 767 init_firewall_macros();
 768
 769 sub get_macros {
 770     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 771 }
 772
 773 my $etc_services;
 774
 775 sub get_etc_services {
 776
 777     return $etc_services if $etc_services;
 778
 779     my $filename = "/etc/services";
 780
 781     my $fh = IO::File->new($filename, O_RDONLY);
 782     if (!$fh) {
 783         warn "unable to read '$filename' - $!\n";
 784         return {};
 785     }
 786
 787     my $services = {};
 788
 789     while (my $line = <$fh>) {
 790         chomp ($line);
 791         next if $line =~m/^#/;
 792         next if ($line =~m/^\s*$/);
 793
 794         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 795             $services->{byid}->{$2}->{name} = $1;
 796             $services->{byid}->{$2}->{port} = $2;
 797             $services->{byid}->{$2}->{$3} = 1;
 798             $services->{byname}->{$1} = $services->{byid}->{$2};
 799         }
 800     }
 801
 802     close($fh);
 803
 804     $etc_services = $services;
 805
 806
 807     return $etc_services;
 808 }
 809
 810 my $etc_protocols;
 811
 812 sub get_etc_protocols {
 813     return $etc_protocols if $etc_protocols;
 814
 815     my $filename = "/etc/protocols";
 816
 817     my $fh = IO::File->new($filename, O_RDONLY);
 818     if (!$fh) {
 819         warn "unable to read '$filename' - $!\n";
 820         return {};
 821     }
 822
 823     my $protocols = {};
 824
 825     while (my $line = <$fh>) {
 826         chomp ($line);
 827         next if $line =~m/^#/;
 828         next if ($line =~m/^\s*$/);
 829
 830         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 831             $protocols->{byid}->{$2}->{name} = $1;
 832             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 833         }
 834     }
 835
 836     close($fh);
 837
 838     # add special case for ICMP v6
 839     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 840     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 841
 842     $etc_protocols = $protocols;
 843
 844     return $etc_protocols;
 845 }
 846
 847 my $ipv4_mask_hash_localnet = {
 848     '255.255.0.0' => 16,
 849     '255.255.128.0' => 17,
 850     '255.255.192.0' => 18,
 851     '255.255.224.0' => 19,
 852     '255.255.240.0' => 20,
 853     '255.255.248.0' => 21,
 854     '255.255.252.0' => 22,
 855     '255.255.254.0' => 23,
 856     '255.255.255.0' => 24,
 857     '255.255.255.128' => 25,
 858     '255.255.255.192' => 26,
 859     '255.255.255.224' => 27,
 860     '255.255.255.240' => 28,
 861     '255.255.255.248' => 29,
 862     '255.255.255.252' => 30,
 863 };
 864
 865 my $__local_network;
 866
 867 sub local_network {
 868     my ($new_value) = @_;
 869
 870     $__local_network = $new_value if defined($new_value);
 871
 872     return $__local_network if defined($__local_network);
 873
 874     eval {
 875         my $nodename = PVE::INotify::nodename();
 876
 877         my $ip = PVE::Cluster::remote_node_ip($nodename);
 878
 879         my $testip = Net::IP->new($ip);
 880
 881         my $routes = PVE::ProcFSTools::read_proc_net_route();
 882         foreach my $entry (@$routes) {
 883             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 884             next if !defined($mask);
 885             return if $mask eq '0.0.0.0';
 886             my $cidr = "$entry->{dest}/$mask";
 887             my $testnet = Net::IP->new($cidr);
 888             if ($testnet->overlaps($testip)) {
 889                 $__local_network = $cidr;
 890                 return;
 891             }
 892         }
 893     };
 894     warn $@ if $@;
 895
 896     return $__local_network;
 897 }
 898
 899 # ipset names are limited to 31 characters,
 900 # and we use '-v4' or '-v6' to indicate IP versions,
 901 # and we use '_swap' suffix for atomic update,
 902 # for example PVEFW-${VMID}-${ipset_name}_swap
 903
 904 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 905
 906 sub compute_ipset_chain_name {
 907     my ($vmid, $ipset_name, $ipversion) = @_;
 908
 909     $vmid = 0 if !defined($vmid);
 910
 911     my $id = "$vmid-${ipset_name}-v$ipversion";
 912
 913     if (length($id) > $max_iptables_ipset_name_length) {
 914         $id = PVE::Tools::fnv31a_hex($id);
 915     }
 916
 917     return "PVEFW-$id";
 918 }
 919
 920 sub compute_ipfilter_ipset_name {
 921     my ($iface) = @_;
 922
 923     return "ipfilter-$iface";
 924 }
 925
 926 sub parse_address_list {
 927     my ($str) = @_;
 928
 929     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 930         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 931         return;
 932     }
 933
 934     if ($str =~ m/^${ip_alias_pattern}$/) {
 935         die "alias name too long\n" if length($str) > $max_alias_name_length;
 936         return;
 937     }
 938
 939     my $count = 0;
 940     my $iprange = 0;
 941     my $ipversion;
 942
 943     foreach my $elem (split(/,/, $str)) {
 944         $count++;
 945         my $ip = Net::IP->new($elem);
 946         if (!$ip) {
 947             my $err = Net::IP::Error();
 948             die "invalid IP address: $err\n";
 949         }
 950         $iprange = 1 if $elem =~ m/-/;
 951
 952         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 953
 954         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 955             if $ipversion && ($new_ipversion != $ipversion);
 956
 957         $ipversion = $new_ipversion;
 958     }
 959
 960     die "you can't use a range in a list\n" if $iprange && $count > 1;
 961
 962     return $ipversion;
 963 }
 964
 965 sub parse_port_name_number_or_range {
 966     my ($str) = @_;
 967
 968     my $services = PVE::Firewall::get_etc_services();
 969     my $count = 0;
 970     my $icmp_port = 0;
 971
 972     foreach my $item (split(/,/, $str)) {
 973         $count++;
 974         if ($item =~ m/^(\d+):(\d+)$/) {
 975             my ($port1, $port2) = ($1, $2);
 976             die "invalid port '$port1'\n" if $port1 > 65535;
 977             die "invalid port '$port2'\n" if $port2 > 65535;
 978         } elsif ($item =~ m/^(\d+)$/) {
 979             my $port = $1;
 980             die "invalid port '$port'\n" if $port > 65535;
 981         } else {
 982             if ($icmp_type_names->{$item}) {
 983                 $icmp_port = 1;
 984             } elsif ($icmpv6_type_names->{$item}) {
 985                 $icmp_port = 1;
 986             } else {
 987                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 988             }
 989         }
 990     }
 991
 992     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 993
 994     return $count;
 995 }
 996
 997 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 998 sub pve_fw_verify_port_spec {
 999    my ($portstr) = @_;
1000
1001    parse_port_name_number_or_range($portstr);
1002
1003    return $portstr;
1004 }
1005
1006 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1007 sub pve_fw_verify_addr_spec {
1008    my ($list) = @_;
1009
1010    parse_address_list($list);
1011
1012    return $list;
1013 }
1014
1015 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1016 sub pve_fw_verify_protocol_spec {
1017    my ($proto) = @_;
1018
1019    my $protocols = get_etc_protocols();
1020
1021    die "unknown protocol '$proto'\n" if $proto &&
1022        !(defined($protocols->{byname}->{$proto}) ||
1023          defined($protocols->{byid}->{$proto}));
1024
1025    return $proto;
1026 }
1027
1028
1029 # helper function for API
1030
1031 sub copy_opject_with_digest {
1032     my ($object) = @_;
1033
1034     my $sha = Digest::SHA->new('sha1');
1035
1036     my $res = {};
1037     foreach my $k (sort keys %$object) {
1038         my $v = $object->{$k};
1039         next if !defined($v);
1040         $res->{$k} = $v;
1041         $sha->add($k, ':', $v, "\n");
1042     }
1043
1044     my $digest = $sha->hexdigest;
1045
1046     $res->{digest} = $digest;
1047
1048     return wantarray ? ($res, $digest) : $res;
1049 }
1050
1051 sub copy_list_with_digest {
1052     my ($list) = @_;
1053
1054     my $sha = Digest::SHA->new('sha1');
1055
1056     my $res = [];
1057     foreach my $entry (@$list) {
1058         my $data = {};
1059         foreach my $k (sort keys %$entry) {
1060             my $v = $entry->{$k};
1061             next if !defined($v);
1062             $data->{$k} = $v;
1063             # Note: digest ignores refs ($rule->{errors})
1064             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1065         }
1066         push @$res, $data;
1067     }
1068
1069     my $digest = $sha->hexdigest;
1070
1071     foreach my $entry (@$res) {
1072         $entry->{digest} = $digest;
1073     }
1074
1075     return wantarray ? ($res, $digest) : $res;
1076 }
1077
1078 my $rule_properties = {
1079     pos => {
1080         description => "Update rule at position <pos>.",
1081         type => 'integer',
1082         minimum => 0,
1083         optional => 1,
1084     },
1085     digest => get_standard_option('pve-config-digest'),
1086     type => {
1087         type => 'string',
1088         optional => 1,
1089         enum => ['in', 'out', 'group'],
1090     },
1091     action => {
1092         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1093         type => 'string',
1094         optional => 1,
1095         pattern => $security_group_name_pattern,
1096         maxLength => 20,
1097         minLength => 2,
1098     },
1099     macro => {
1100         type => 'string',
1101         optional => 1,
1102         maxLength => 128,
1103     },
1104     iface => get_standard_option('pve-iface', { optional => 1 }),
1105     source => {
1106         type => 'string', format => 'pve-fw-addr-spec',
1107         optional => 1,
1108     },
1109     dest => {
1110         type => 'string', format => 'pve-fw-addr-spec',
1111         optional => 1,
1112     },
1113     proto => {
1114         type => 'string', format => 'pve-fw-protocol-spec',
1115         optional => 1,
1116     },
1117     enable => {
1118         type => 'boolean',
1119         optional => 1,
1120     },
1121     sport => {
1122         type => 'string', format => 'pve-fw-port-spec',
1123         optional => 1,
1124     },
1125     dport => {
1126         type => 'string', format => 'pve-fw-port-spec',
1127         optional => 1,
1128     },
1129     comment => {
1130         type => 'string',
1131         optional => 1,
1132     },
1133 };
1134
1135 sub add_rule_properties {
1136     my ($properties) = @_;
1137
1138     foreach my $k (keys %$rule_properties) {
1139         my $h = $rule_properties->{$k};
1140         # copy data, so that we can modify later without side effects
1141         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1142     }
1143
1144     return $properties;
1145 }
1146
1147 sub delete_rule_properties {
1148     my ($rule, $delete_str) = @_;
1149
1150     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1151         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1152             if !defined($rule_properties->{$opt});
1153         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1154             if $opt eq 'type' || $opt eq 'action';
1155         delete $rule->{$opt};
1156     }
1157
1158     return $rule;
1159 }
1160
1161 my $apply_macro = sub {
1162     my ($macro_name, $param, $verify, $ipversion) = @_;
1163
1164     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1165     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1166
1167     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1168         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1169     }
1170
1171     my $rules = [];
1172
1173     foreach my $templ (@$macro_rules) {
1174         my $rule = {};
1175         my $param_used = {};
1176         foreach my $k (keys %$templ) {
1177             my $v = $templ->{$k};
1178             if ($v eq 'PARAM') {
1179                 $v = $param->{$k};
1180                 $param_used->{$k} = 1;
1181             } elsif ($v eq 'DEST') {
1182                 $v = $param->{dest};
1183                 $param_used->{dest} = 1;
1184             } elsif ($v eq 'SOURCE') {
1185                 $v = $param->{source};
1186                 $param_used->{source} = 1;
1187             }
1188
1189             if (!defined($v)) {
1190                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1191                 raise_param_exc({ macro => $msg }) if $verify;
1192                 die "$msg\n";
1193             }
1194             $rule->{$k} = $v;
1195         }
1196         foreach my $k (keys %$param) {
1197             next if $k eq 'macro';
1198             next if !defined($param->{$k});
1199             next if $param_used->{$k};
1200             if (defined($rule->{$k})) {
1201                 if ($rule->{$k} ne $param->{$k}) {
1202                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1203                     raise_param_exc({ $k => $msg }) if $verify;
1204                     die "$msg\n";
1205                 }
1206             } else {
1207                 $rule->{$k} = $param->{$k};
1208             }
1209         }
1210         push @$rules, $rule;
1211     }
1212
1213     return $rules;
1214 };
1215
1216 my $rule_env_iface_lookup = {
1217     'ct' => 1,
1218     'vm' => 1,
1219     'group' => 0,
1220     'cluster' => 1,
1221     'host' => 1,
1222 };
1223
1224 sub verify_rule {
1225     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1226
1227     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1228
1229     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1230     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1231
1232     my $errors = $rule->{errors} || {};
1233
1234     my $error_count = 0;
1235
1236     my $add_error = sub {
1237         my ($param, $msg)  = @_;
1238         chomp $msg;
1239         raise_param_exc({ $param => $msg }) if !$noerr;
1240         $error_count++;
1241         $errors->{$param} = $msg if !$errors->{$param};
1242     };
1243
1244     my $ipversion;
1245     my $set_ip_version = sub {
1246         my $vers = shift;
1247         if ($vers) {
1248             die "detected mixed ipv4/ipv6 adresses in rule\n"
1249                 if $ipversion && ($vers != $ipversion);
1250             $ipversion = $vers;
1251         }
1252     };
1253
1254     my $check_ipset_or_alias_property = sub {
1255         my ($name, $expected_ipversion) = @_;
1256
1257         if (my $value = $rule->{$name}) {
1258             if ($value =~ m/^\+/) {
1259                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1260                     &$add_error($name, "no such ipset '$1'")
1261                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1262
1263                 } else {
1264                     &$add_error($name, "invalid ipset name '$value'");
1265                 }
1266             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1267                 my $alias = lc($value);
1268                 &$add_error($name, "no such alias '$value'")
1269                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1270                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1271                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1272
1273                 &$set_ip_version($e->{ipversion});
1274             }
1275         }
1276     };
1277
1278     my $type = $rule->{type};
1279     my $action = $rule->{action};
1280
1281     &$add_error('type', "missing property") if !$type;
1282     &$add_error('action', "missing property") if !$action;
1283
1284     if ($type) {
1285         if ($type eq  'in' || $type eq 'out') {
1286             &$add_error('action', "unknown action '$action'")
1287                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1288         } elsif ($type eq 'group') {
1289             &$add_error('type', "security groups not allowed")
1290                 if !$allow_groups;
1291             &$add_error('action', "invalid characters in security group name")
1292                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1293         } else {
1294             &$add_error('type', "unknown rule type '$type'");
1295         }
1296     }
1297
1298     if ($rule->{iface}) {
1299         &$add_error('type', "parameter -i not allowed for this rule type")
1300             if !$allow_iface;
1301         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1302         &$add_error('iface', $@) if $@;
1303         if ($rule_env eq 'vm') {
1304             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1305                 if $rule->{iface} !~  m/^net(\d+)$/;
1306         } elsif ($rule_env eq 'ct') {
1307             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1308                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1309         }
1310     }
1311
1312     if ($rule->{macro}) {
1313         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1314             $rule->{macro} = $preferred_name;
1315         } else {
1316             &$add_error('macro', "unknown macro '$rule->{macro}'");
1317         }
1318     }
1319
1320     if ($rule->{proto}) {
1321         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1322         &$add_error('proto', $@) if $@;
1323         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1324         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1325     }
1326
1327     if ($rule->{dport}) {
1328         eval { parse_port_name_number_or_range($rule->{dport}); };
1329         &$add_error('dport', $@) if $@;
1330         &$add_error('proto', "missing property - 'dport' requires this property")
1331             if !$rule->{proto};
1332     }
1333
1334     if ($rule->{sport}) {
1335         eval { parse_port_name_number_or_range($rule->{sport}); };
1336         &$add_error('sport', $@) if $@;
1337         &$add_error('proto', "missing property - 'sport' requires this property")
1338             if !$rule->{proto};
1339     }
1340
1341     if ($rule->{source}) {
1342         eval {
1343             my $source_ipversion = parse_address_list($rule->{source});
1344             &$set_ip_version($source_ipversion);
1345         };
1346         &$add_error('source', $@) if $@;
1347         &$check_ipset_or_alias_property('source', $ipversion);
1348     }
1349
1350     if ($rule->{dest}) {
1351         eval {
1352             my $dest_ipversion = parse_address_list($rule->{dest});
1353             &$set_ip_version($dest_ipversion);
1354         };
1355         &$add_error('dest', $@) if $@;
1356         &$check_ipset_or_alias_property('dest', $ipversion);
1357     }
1358
1359     $rule->{ipversion} = $ipversion if $ipversion;
1360
1361     if ($rule->{macro} && !$error_count) {
1362         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1363         if (my $err = $@) {
1364             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1365                 my $eh = $err->{errors};
1366                 foreach my $p (keys %$eh) {
1367                     &$add_error($p, $eh->{$p});
1368                 }
1369             } else {
1370                 &$add_error('macro', "$err");
1371             }
1372         }
1373     }
1374
1375     $rule->{errors} = $errors if $error_count;
1376
1377     return $rule;
1378 }
1379
1380 sub copy_rule_data {
1381     my ($rule, $param) = @_;
1382
1383     foreach my $k (keys %$rule_properties) {
1384         if (defined(my $v = $param->{$k})) {
1385             if ($v eq '' || $v eq '-') {
1386                 delete $rule->{$k};
1387             } else {
1388                 $rule->{$k} = $v;
1389             }
1390         }
1391     }
1392
1393     return $rule;
1394 }
1395
1396 sub rules_modify_permissions {
1397     my ($rule_env) = @_;
1398
1399     if ($rule_env eq 'host') {
1400         return {
1401             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1402         };
1403     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1404         return {
1405             check => ['perm', '/', [ 'Sys.Modify' ]],
1406         };
1407     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1408         return {
1409             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1410         }
1411     }
1412
1413     return undef;
1414 }
1415
1416 sub rules_audit_permissions {
1417     my ($rule_env) = @_;
1418
1419     if ($rule_env eq 'host') {
1420         return {
1421             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1422         };
1423     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1424         return {
1425             check => ['perm', '/', [ 'Sys.Audit' ]],
1426         };
1427     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1428         return {
1429             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1430         }
1431     }
1432
1433     return undef;
1434 }
1435
1436 # core functions
1437 my $bridge_firewall_enabled = 0;
1438
1439 sub enable_bridge_firewall {
1440
1441     return if $bridge_firewall_enabled; # only once
1442
1443     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1444     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1445
1446     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1447     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1448
1449     $bridge_firewall_enabled = 1;
1450 }
1451
1452 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1453
1454 sub iptables_restore_cmdlist {
1455     my ($cmdlist) = @_;
1456
1457     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1458 }
1459
1460 sub ip6tables_restore_cmdlist {
1461     my ($cmdlist) = @_;
1462
1463     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1464 }
1465
1466 sub ipset_restore_cmdlist {
1467     my ($cmdlist) = @_;
1468
1469     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1470 }
1471
1472 sub iptables_get_chains {
1473     my ($iptablescmd) = @_;
1474
1475     $iptablescmd = "iptables" if !$iptablescmd;
1476
1477     my $res = {};
1478
1479     # check what chains we want to track
1480     my $is_pvefw_chain = sub {
1481         my $name = shift;
1482
1483         return 1 if $name =~ m/^PVEFW-\S+$/;
1484
1485         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1486
1487         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1488
1489         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1490
1491         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1492         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1493
1494         return undef;
1495     };
1496
1497     my $table = '';
1498
1499     my $hooks = {};
1500
1501     my $parser = sub {
1502         my $line = shift;
1503
1504         return if $line =~ m/^#/;
1505         return if $line =~ m/^\s*$/;
1506
1507         if ($line =~ m/^\*(\S+)$/) {
1508             $table = $1;
1509             return;
1510         }
1511
1512         return if $table ne 'filter';
1513
1514         if ($line =~ m/^:(\S+)\s/) {
1515             my $chain = $1;
1516             return if !&$is_pvefw_chain($chain);
1517             $res->{$chain} = "unknown";
1518         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1519             my ($chain, $sig) = ($1, $2);
1520             return if !&$is_pvefw_chain($chain);
1521             $res->{$chain} = $sig;
1522         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1523             $hooks->{$1} = 1;
1524         } else {
1525             # simply ignore the rest
1526             return;
1527         }
1528     };
1529
1530     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1531
1532     return wantarray ? ($res, $hooks) : $res;
1533 }
1534
1535 sub iptables_chain_digest {
1536     my ($rules) = @_;
1537     my $digest = Digest::SHA->new('sha1');
1538     foreach my $rule (@$rules) { # order is important
1539         $digest->add($rule);
1540     }
1541     return $digest->b64digest;
1542 }
1543
1544 sub ipset_chain_digest {
1545     my ($rules) = @_;
1546
1547     my $digest = Digest::SHA->new('sha1');
1548     foreach my $rule (sort @$rules) { # note: sorted
1549         $digest->add($rule);
1550     }
1551     return $digest->b64digest;
1552 }
1553
1554 sub ipset_get_chains {
1555
1556     my $res = {};
1557     my $chains = {};
1558
1559     my $parser = sub {
1560         my $line = shift;
1561
1562         return if $line =~ m/^#/;
1563         return if $line =~ m/^\s*$/;
1564         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1565             my $chain = $1;
1566             $line =~ s/\s+$//; # delete trailing white space
1567             push @{$chains->{$chain}}, $line;
1568         } else {
1569             # simply ignore the rest
1570             return;
1571         }
1572     };
1573
1574     run_command("/usr/sbin/ipset save", outfunc => $parser);
1575
1576     # compute digest for each chain
1577     foreach my $chain (keys %$chains) {
1578         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1579     }
1580
1581     return $res;
1582 }
1583
1584 sub ruleset_generate_cmdstr {
1585     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1586
1587     return if defined($rule->{enable}) && !$rule->{enable};
1588     return if $rule->{errors};
1589
1590     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1591
1592     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1593     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1594
1595     my @cmd = ();
1596
1597     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1598     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1599
1600     my $source = $rule->{source};
1601     my $dest = $rule->{dest};
1602
1603     if ($source) {
1604         if ($source =~ m/^\+/) {
1605             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1606                 my $name = $1;
1607                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1608                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1609                     push @cmd, "-m set --match-set ${ipset_chain} src";
1610                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1611                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1612                     push @cmd, "-m set --match-set ${ipset_chain} src";
1613                 } else {
1614                     die "no such ipset '$name'\n";
1615                 }
1616             } else {
1617                 die "invalid security group name '$source'\n";
1618             }
1619         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1620             my $alias = lc($source);
1621             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1622             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1623             die "no such alias '$source'\n" if !$e;
1624             push @cmd, "-s $e->{cidr}";
1625         } elsif ($source =~ m/\-/){
1626             push @cmd, "-m iprange --src-range $source";
1627         } else {
1628             push @cmd, "-s $source";
1629         }
1630     }
1631
1632     if ($dest) {
1633         if ($dest =~ m/^\+/) {
1634             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1635                 my $name = $1;
1636                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1637                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1638                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1639                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1640                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1641                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1642                 } else {
1643                     die "no such ipset '$name'\n";
1644                 }
1645             } else {
1646                 die "invalid security group name '$dest'\n";
1647             }
1648         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1649             my $alias = lc($dest);
1650             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1651             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1652             die "no such alias '$dest'\n" if !$e;
1653             push @cmd, "-d $e->{cidr}";
1654         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1655             push @cmd, "-m iprange --dst-range $dest";
1656         } else {
1657             push @cmd, "-d $dest";
1658         }
1659     }
1660
1661     if ($rule->{proto}) {
1662         push @cmd, "-p $rule->{proto}";
1663
1664         my $multiport = 0;
1665         $multiport++ if $nbdport > 1;
1666         $multiport++ if $nbsport > 1;
1667
1668         push @cmd, "--match multiport" if $multiport;
1669
1670         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1671             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1672
1673         if ($rule->{dport}) {
1674             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1675                 # Note: we use dport to store --icmp-type
1676                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1677                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1678             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1679                 # Note: we use dport to store --icmpv6-type
1680                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1681                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1682             } else {
1683                 if ($nbdport > 1) {
1684                     if ($multiport == 2) {
1685                         push @cmd,  "--ports $rule->{dport}";
1686                     } else {
1687                         push @cmd, "--dports $rule->{dport}";
1688                     }
1689                 } else {
1690                     push @cmd, "--dport $rule->{dport}";
1691                 }
1692             }
1693         }
1694
1695         if ($rule->{sport}) {
1696             if ($nbsport > 1) {
1697                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1698             } else {
1699                 push @cmd, "--sport $rule->{sport}";
1700             }
1701         }
1702     } elsif ($rule->{dport} || $rule->{sport}) {
1703         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1704         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1705     }
1706
1707     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1708
1709     if (my $action = $rule->{action}) {
1710         $action = $actions->{$action} if defined($actions->{$action});
1711         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1712         push @cmd, $goto ? "-g $action" : "-j $action";
1713     }
1714
1715     return scalar(@cmd) ? join(' ', @cmd) : undef;
1716 }
1717
1718 sub ruleset_generate_rule {
1719     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1720
1721     my $rules;
1722
1723     if ($rule->{macro}) {
1724         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1725     } else {
1726         $rules = [ $rule ];
1727     }
1728
1729     # update all or nothing
1730
1731     my @cmds = ();
1732     foreach my $tmp (@$rules) {
1733         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1734             push @cmds, $cmdstr;
1735         }
1736     }
1737
1738     foreach my $cmdstr (@cmds) {
1739         ruleset_addrule($ruleset, $chain, $cmdstr);
1740     }
1741 }
1742
1743 sub ruleset_generate_rule_insert {
1744     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1745
1746     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1747
1748     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1749         ruleset_insertrule($ruleset, $chain, $cmdstr);
1750     }
1751 }
1752
1753 sub ruleset_create_chain {
1754     my ($ruleset, $chain) = @_;
1755
1756     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1757     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1758
1759     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1760
1761     $ruleset->{$chain} = [];
1762 }
1763
1764 sub ruleset_chain_exist {
1765     my ($ruleset, $chain) = @_;
1766
1767     return $ruleset->{$chain} ? 1 : undef;
1768 }
1769
1770 sub ruleset_addrule {
1771    my ($ruleset, $chain, $rule) = @_;
1772
1773    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1774
1775    push @{$ruleset->{$chain}}, "-A $chain $rule";
1776 }
1777
1778 sub ruleset_insertrule {
1779    my ($ruleset, $chain, $rule) = @_;
1780
1781    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1782
1783    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1784 }
1785
1786 sub get_log_rule_base {
1787     my ($chain, $vmid, $msg, $loglevel) = @_;
1788
1789     die "internal error - no log level" if !defined($loglevel);
1790
1791     $vmid = 0 if !defined($vmid);
1792
1793     # Note: we use special format for prefix to pass further
1794     # info to log daemon (VMID, LOGVELEL and CHAIN)
1795
1796     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1797 }
1798
1799 sub ruleset_addlog {
1800     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1801
1802     return if !defined($loglevel);
1803
1804     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1805
1806     $logrule = "$rule $logrule" if defined($rule);
1807
1808     ruleset_addrule($ruleset, $chain, $logrule);
1809 }
1810
1811 sub ruleset_add_chain_policy {
1812     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1813
1814     if ($policy eq 'ACCEPT') {
1815
1816         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1817                               { ACCEPT =>  $accept_action});
1818
1819     } elsif ($policy eq 'DROP') {
1820
1821         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1822
1823         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1824
1825         ruleset_addrule($ruleset, $chain, "-j DROP");
1826     } elsif ($policy eq 'REJECT') {
1827         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1828
1829         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1830
1831         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1832     } else {
1833         # should not happen
1834         die "internal error: unknown policy '$policy'";
1835     }
1836 }
1837
1838 sub ruleset_chain_add_conn_filters {
1839     my ($ruleset, $chain, $accept) = @_;
1840
1841     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1842     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1843 }
1844
1845 sub ruleset_chain_add_input_filters {
1846     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1847
1848     if ($cluster_conf->{ipset}->{blacklist}){
1849         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1850             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1851             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1852             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1853         }
1854         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1855         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1856     }
1857
1858     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1859         if ($ipversion == 4) {
1860             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1861         }
1862     }
1863
1864     if ($options->{tcpflags}) {
1865         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1866     }
1867 }
1868
1869 sub ruleset_create_vm_chain {
1870     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1871
1872     ruleset_create_chain($ruleset, $chain);
1873     my $accept = generate_nfqueue($options);
1874
1875     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1876         if ($direction eq 'OUT') {
1877             ruleset_generate_rule($ruleset, $chain, $ipversion,
1878                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1879                                     proto => 'udp', sport => 68, dport => 67 });
1880         } else {
1881             ruleset_generate_rule($ruleset, $chain, $ipversion,
1882                                   { action => 'ACCEPT',
1883                                     proto => 'udp', sport => 67, dport => 68 });
1884         }
1885     }
1886
1887     if ($direction eq 'OUT') {
1888         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1889             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1890         }
1891         if ($ipfilter_ipset) {
1892             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1893         }
1894         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1895     }
1896 }
1897
1898 sub ruleset_add_group_rule {
1899     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1900
1901     my $group = $rule->{action};
1902     my $group_chain = "GROUP-$group-$direction";
1903     if(!ruleset_chain_exist($ruleset, $group_chain)){
1904         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1905     }
1906
1907     if ($direction eq 'OUT' && $rule->{iface_out}) {
1908         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1909     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1910         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1911     } else {
1912         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1913     }
1914
1915     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1916 }
1917
1918 sub ruleset_generate_vm_rules {
1919     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1920
1921     my $lc_direction = lc($direction);
1922
1923     my $in_accept = generate_nfqueue($options);
1924
1925     foreach my $rule (@$rules) {
1926         next if $rule->{iface} && $rule->{iface} ne $netid;
1927         next if !$rule->{enable} || $rule->{errors};
1928         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1929
1930         if ($rule->{type} eq 'group') {
1931             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1932                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1933         } else {
1934             next if $rule->{type} ne $lc_direction;
1935             eval {
1936                 if ($direction eq 'OUT') {
1937                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1938                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1939                                           undef, $cluster_conf, $vmfw_conf);
1940                 } else {
1941                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1942                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1943                                           undef, $cluster_conf, $vmfw_conf);
1944                 }
1945             };
1946             warn $@ if $@;
1947         }
1948     }
1949 }
1950
1951 sub generate_nfqueue {
1952     my ($options) = @_;
1953
1954     if ($options->{ips}) {
1955         my $action = "NFQUEUE";
1956         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1957             if (defined($3) && defined($1)) {
1958                 $action .= " --queue-balance $1:$3";
1959             } elsif (defined($1)) {
1960                 $action .= " --queue-num $1";
1961             }
1962         }
1963         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1964         return $action;
1965     } else {
1966         return "ACCEPT";
1967     }
1968 }
1969
1970 sub ruleset_generate_vm_ipsrules {
1971     my ($ruleset, $options, $direction, $iface) = @_;
1972
1973     if ($options->{ips} && $direction eq 'IN') {
1974         my $nfqueue = generate_nfqueue($options);
1975
1976         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1977             ruleset_create_chain($ruleset, "PVEFW-IPS");
1978         }
1979
1980         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1981     }
1982 }
1983
1984 sub generate_venet_rules_direction {
1985     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1986
1987     my $lc_direction = lc($direction);
1988
1989     my $rules = $vmfw_conf->{rules};
1990
1991     my $options = $vmfw_conf->{options};
1992     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1993
1994     my $chain = "venet0-$vmid-$direction";
1995
1996     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
1997
1998     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1999
2000     # implement policy
2001     my $policy;
2002
2003     if ($direction eq 'OUT') {
2004         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2005     } else {
2006         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2007     }
2008
2009     my $accept = generate_nfqueue($options);
2010     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2011     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2012
2013     if ($direction eq 'OUT') {
2014         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2015             action => $chain,
2016             source => $ip,
2017             iface_in => 'venet0'});
2018     } else {
2019         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2020             action => $chain,
2021             dest => $ip,
2022             iface_out => 'venet0'});
2023     }
2024 }
2025
2026 sub generate_tap_rules_direction {
2027     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2028
2029     my $lc_direction = lc($direction);
2030
2031     my $rules = $vmfw_conf->{rules};
2032
2033     my $options = $vmfw_conf->{options};
2034     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2035
2036     my $tapchain = "$iface-$direction";
2037
2038     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2039     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2040         if $vmfw_conf->{ipset}->{$ipfilter_name};
2041
2042     # create chain with mac and ip filter
2043     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2044
2045     if ($options->{enable}) {
2046         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2047
2048         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2049
2050         # implement policy
2051         my $policy;
2052
2053         if ($direction eq 'OUT') {
2054             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2055         } else {
2056         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2057         }
2058
2059         my $accept = generate_nfqueue($options);
2060         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2061         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2062     } else {
2063         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2064         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2065     }
2066
2067     # plug the tap chain to bridge chain
2068     if ($direction eq 'IN') {
2069         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2070                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2071     } else {
2072         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2073                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2074     }
2075 }
2076
2077 sub enable_host_firewall {
2078     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2079
2080     my $options = $hostfw_conf->{options};
2081     my $cluster_options = $cluster_conf->{options};
2082     my $rules = $hostfw_conf->{rules};
2083     my $cluster_rules = $cluster_conf->{rules};
2084
2085     # host inbound firewall
2086     my $chain = "PVEFW-HOST-IN";
2087     ruleset_create_chain($ruleset, $chain);
2088
2089     my $loglevel = get_option_log_level($options, "log_level_in");
2090
2091     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2092
2093     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2094     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2095
2096     # we use RETURN because we need to check also tap rules
2097     my $accept_action = 'RETURN';
2098
2099     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2100
2101     # add host rules first, so that cluster wide rules can be overwritten
2102     foreach my $rule (@$rules, @$cluster_rules) {
2103         next if !$rule->{enable} || $rule->{errors};
2104         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2105
2106         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2107
2108         eval {
2109             if ($rule->{type} eq 'group') {
2110                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2111             } elsif ($rule->{type} eq 'in') {
2112                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2113                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2114                                       undef, $cluster_conf, $hostfw_conf);
2115             }
2116         };
2117         warn $@ if $@;
2118         delete $rule->{iface_in};
2119     }
2120
2121     # allow standard traffic for management ipset (includes cluster network)
2122     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2123     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2124     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2125     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2126     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2127     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2128
2129     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2130     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2131
2132     # corosync
2133     if ($localnet && ($ipversion == $localnet_ver)) {
2134         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2135         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2136         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2137     }
2138
2139     # implement input policy
2140     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2141     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2142
2143     # host outbound firewall
2144     $chain = "PVEFW-HOST-OUT";
2145     ruleset_create_chain($ruleset, $chain);
2146
2147     $loglevel = get_option_log_level($options, "log_level_out");
2148
2149     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2150
2151     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2152
2153     # we use RETURN because we may want to check other thigs later
2154     $accept_action = 'RETURN';
2155
2156     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2157
2158     # add host rules first, so that cluster wide rules can be overwritten
2159     foreach my $rule (@$rules, @$cluster_rules) {
2160         next if !$rule->{enable} || $rule->{errors};
2161         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2162
2163         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2164         eval {
2165             if ($rule->{type} eq 'group') {
2166                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2167             } elsif ($rule->{type} eq 'out') {
2168                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2169                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2170                                       undef, $cluster_conf, $hostfw_conf);
2171             }
2172         };
2173         warn $@ if $@;
2174         delete $rule->{iface_out};
2175     }
2176
2177     # allow standard traffic on cluster network
2178     if ($localnet && ($ipversion == $localnet_ver)) {
2179         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2180         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2181         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2182         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2183
2184         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2185         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2186         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2187     }
2188
2189     # implement output policy
2190     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2191     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2192
2193     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2194     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2195 }
2196
2197 sub generate_group_rules {
2198     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2199
2200     my $rules = $cluster_conf->{groups}->{$group};
2201
2202     if (!$rules) {
2203         warn "no such security group '$group'\n";
2204         $rules = []; # create empty chain
2205     }
2206
2207     my $chain = "GROUP-${group}-IN";
2208
2209     ruleset_create_chain($ruleset, $chain);
2210     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2211
2212     foreach my $rule (@$rules) {
2213         next if $rule->{type} ne 'in';
2214         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2215         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2216                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2217                               undef, $cluster_conf);
2218     }
2219
2220     $chain = "GROUP-${group}-OUT";
2221
2222     ruleset_create_chain($ruleset, $chain);
2223     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2224
2225     foreach my $rule (@$rules) {
2226         next if $rule->{type} ne 'out';
2227         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2228         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2229         # check also other tap rules later
2230         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2231                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2232                               undef, $cluster_conf);
2233     }
2234 }
2235
2236 my $MAX_NETS = 32;
2237 my $valid_netdev_names = {};
2238 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2239     $valid_netdev_names->{"net$i"} = 1;
2240 }
2241
2242 sub parse_fw_rule {
2243     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2244
2245     my $orig_line = $line;
2246
2247     my $rule = {};
2248
2249     # we can add single line comments to the end of the rule
2250     if ($line =~ s/#\s*(.*?)\s*$//) {
2251         $rule->{comment} = decode('utf8', $1);
2252     }
2253
2254     # we can disable a rule when prefixed with '|'
2255
2256     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2257
2258     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2259         die "unable to parse rule: $line\n";
2260
2261     $rule->{type} = lc($1);
2262     $rule->{action} = $2;
2263
2264     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2265         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2266             $rule->{macro} = $1;
2267             $rule->{action} = $2;
2268         }
2269     }
2270
2271     while (length($line)) {
2272         if ($line =~ s/^-i (\S+)\s*//) {
2273             $rule->{iface} = $1;
2274             next;
2275         }
2276
2277         last if $rule->{type} eq 'group';
2278
2279         if ($line =~ s/^-p (\S+)\s*//) {
2280             $rule->{proto} = $1;
2281             next;
2282         }
2283
2284         if ($line =~ s/^-dport (\S+)\s*//) {
2285             $rule->{dport} = $1;
2286             next;
2287         }
2288
2289         if ($line =~ s/^-sport (\S+)\s*//) {
2290             $rule->{sport} = $1;
2291             next;
2292         }
2293         if ($line =~ s/^-source (\S+)\s*//) {
2294             $rule->{source} = $1;
2295             next;
2296         }
2297         if ($line =~ s/^-dest (\S+)\s*//) {
2298             $rule->{dest} = $1;
2299             next;
2300         }
2301
2302         last;
2303     }
2304
2305     die "unable to parse rule parameters: $line\n" if length($line);
2306
2307     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2308     if ($verbose && $rule->{errors}) {
2309         warn "$prefix - errors in rule parameters: $orig_line\n";
2310         foreach my $p (keys %{$rule->{errors}}) {
2311             warn "  $p: $rule->{errors}->{$p}\n";
2312         }
2313     }
2314
2315     return $rule;
2316 }
2317
2318 sub parse_vmfw_option {
2319     my ($line) = @_;
2320
2321     my ($opt, $value);
2322
2323     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2324
2325     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2326         $opt = lc($1);
2327         $value = int($2);
2328     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2329         $opt = lc($1);
2330         $value = $2 ? lc($3) : '';
2331     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2332         $opt = lc($1);
2333         $value = uc($3);
2334     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2335         $opt = lc($1);
2336         $value = $2;
2337     } else {
2338         die "can't parse option '$line'\n"
2339     }
2340
2341     return ($opt, $value);
2342 }
2343
2344 sub parse_hostfw_option {
2345     my ($line) = @_;
2346
2347     my ($opt, $value);
2348
2349     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2350
2351     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2352         $opt = lc($1);
2353         $value = int($2);
2354     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2355         $opt = lc($1);
2356         $value = $2 ? lc($3) : '';
2357     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2358         $opt = lc($1);
2359         $value = int($2);
2360     } else {
2361         die "can't parse option '$line'\n"
2362     }
2363
2364     return ($opt, $value);
2365 }
2366
2367 sub parse_clusterfw_option {
2368     my ($line) = @_;
2369
2370     my ($opt, $value);
2371
2372     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2373         $opt = lc($1);
2374         $value = int($2);
2375     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2376         $opt = lc($1);
2377         $value = uc($3);
2378     } else {
2379         die "can't parse option '$line'\n"
2380     }
2381
2382     return ($opt, $value);
2383 }
2384
2385 sub resolve_alias {
2386     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2387
2388     my $alias = lc($cidr);
2389     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2390     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2391
2392     die "no such alias '$cidr'\n" if !$e;;
2393
2394     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2395 }
2396
2397 sub parse_ip_or_cidr {
2398     my ($cidr) = @_;
2399
2400     my $ipversion;
2401
2402     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2403         $cidr =~ s|/128$||;
2404         $ipversion = 6;
2405     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2406         $cidr =~ s|/32$||;
2407         $ipversion = 4;
2408     } else {
2409         die "value does not look like a valid IP address or CIDR network\n";
2410     }
2411
2412     return wantarray ? ($cidr, $ipversion) : $cidr;
2413 }
2414
2415 sub parse_alias {
2416     my ($line) = @_;
2417
2418     # we can add single line comments to the end of the line
2419     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2420
2421     if ($line =~ m/^(\S+)\s(\S+)$/) {
2422         my ($name, $cidr) = ($1, $2);
2423         my $ipversion;
2424
2425         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2426
2427         my $data = {
2428             name => $name,
2429             cidr => $cidr,
2430             ipversion => $ipversion,
2431         };
2432         $data->{comment} = $comment  if $comment;
2433         return $data;
2434     }
2435
2436     return undef;
2437 }
2438
2439 sub generic_fw_config_parser {
2440     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2441
2442     my $section;
2443     my $group;
2444
2445     my $res = $empty_conf;
2446
2447     while (defined(my $line = <$fh>)) {
2448         next if $line =~ m/^#/;
2449         next if $line =~ m/^\s*$/;
2450
2451         chomp $line;
2452
2453         my $linenr = $fh->input_line_number();
2454         my $prefix = "$filename (line $linenr)";
2455
2456         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2457             $section = 'options';
2458             next;
2459         }
2460
2461         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2462             $section = 'aliases';
2463             next;
2464         }
2465
2466         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2467             $section = 'groups';
2468             $group = lc($1);
2469             my $comment = $2;
2470             eval {
2471                 die "security group name too long\n" if length($group) > $max_group_name_length;
2472                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2473             };
2474             if (my $err = $@) {
2475                 ($section, $group, $comment) = undef;
2476                 warn "$prefix: $err";
2477                 next;
2478             }
2479
2480             $res->{$section}->{$group} = [];
2481             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2482                 if $comment;
2483             next;
2484         }
2485
2486         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2487             $section = 'rules';
2488             next;
2489         }
2490
2491         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2492             $section = 'ipset';
2493             $group = lc($1);
2494             my $comment = $2;
2495             eval {
2496                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2497                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2498             };
2499             if (my $err = $@) {
2500                 ($section, $group, $comment) = undef;
2501                 warn "$prefix: $err";
2502                 next;
2503             }
2504
2505             $res->{$section}->{$group} = [];
2506             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2507                 if $comment;
2508             next;
2509         }
2510
2511         if (!$section) {
2512             warn "$prefix: skip line - no section\n";
2513             next;
2514         }
2515
2516         if ($section eq 'options') {
2517             eval {
2518                 my ($opt, $value);
2519                 if ($rule_env eq 'cluster') {
2520                     ($opt, $value) = parse_clusterfw_option($line);
2521                 } elsif ($rule_env eq 'host') {
2522                     ($opt, $value) = parse_hostfw_option($line);
2523                 } else {
2524                     ($opt, $value) = parse_vmfw_option($line);
2525                 }
2526                 $res->{options}->{$opt} = $value;
2527             };
2528             warn "$prefix: $@" if $@;
2529         } elsif ($section eq 'aliases') {
2530             eval {
2531                 my $data = parse_alias($line);
2532                 $res->{aliases}->{lc($data->{name})} = $data;
2533             };
2534             warn "$prefix: $@" if $@;
2535         } elsif ($section eq 'rules') {
2536             my $rule;
2537             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2538             if (my $err = $@) {
2539                 warn "$prefix: $err";
2540                 next;
2541             }
2542             push @{$res->{$section}}, $rule;
2543         } elsif ($section eq 'groups') {
2544             my $rule;
2545             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2546             if (my $err = $@) {
2547                 warn "$prefix: $err";
2548                 next;
2549             }
2550             push @{$res->{$section}->{$group}}, $rule;
2551         } elsif ($section eq 'ipset') {
2552             # we can add single line comments to the end of the rule
2553             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2554
2555             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2556             my $nomatch = $1;
2557             my $cidr = $2;
2558             my $errors;
2559
2560             if ($nomatch && !$feature_ipset_nomatch) {
2561                 $errors->{nomatch} = "nomatch not supported by kernel";
2562             }
2563
2564             eval {
2565                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2566                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2567                 } else {
2568                     $cidr = parse_ip_or_cidr($cidr);
2569                 }
2570             };
2571             if (my $err = $@) {
2572                 chomp $err;
2573                 $errors->{cidr} = $err;
2574             }
2575
2576             my $entry = { cidr => $cidr };
2577             $entry->{nomatch} = 1 if $nomatch;
2578             $entry->{comment} = $comment if $comment;
2579             $entry->{errors} =  $errors if $errors;
2580
2581             if ($verbose && $errors) {
2582                 warn "$prefix - errors in ipset '$group': $line\n";
2583                 foreach my $p (keys %{$errors}) {
2584                     warn "  $p: $errors->{$p}\n";
2585                 }
2586             }
2587
2588             push @{$res->{$section}->{$group}}, $entry;
2589         } else {
2590             warn "$prefix: skip line - unknown section\n";
2591             next;
2592         }
2593     }
2594
2595     return $res;
2596 }
2597
2598 sub parse_hostfw_config {
2599     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2600
2601     my $empty_conf = { rules => [], options => {}};
2602
2603     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2604 }
2605
2606 sub parse_vmfw_config {
2607     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2608
2609     my $empty_conf = {
2610         rules => [],
2611         options => {},
2612         aliases => {},
2613         ipset => {} ,
2614         ipset_comments => {},
2615     };
2616
2617     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2618 }
2619
2620 sub parse_clusterfw_config {
2621     my ($filename, $fh, $verbose) = @_;
2622
2623     my $section;
2624     my $group;
2625
2626     my $empty_conf = {
2627         rules => [],
2628         options => {},
2629         aliases => {},
2630         groups => {},
2631         group_comments => {},
2632         ipset => {} ,
2633         ipset_comments => {},
2634     };
2635
2636     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2637 }
2638
2639 sub run_locked {
2640     my ($code, @param) = @_;
2641
2642     my $timeout = 10;
2643
2644     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2645
2646     die $@ if $@;
2647
2648     return $res;
2649 }
2650
2651 sub read_local_vm_config {
2652
2653     my $openvz = {};
2654     my $qemu = {};
2655
2656     my $vmdata = { openvz => $openvz, qemu => $qemu };
2657
2658     my $vmlist = PVE::Cluster::get_vmlist();
2659     return $vmdata if !$vmlist || !$vmlist->{ids};
2660     my $ids = $vmlist->{ids};
2661
2662     foreach my $vmid (keys %$ids) {
2663         next if !$vmid; # skip VE0
2664         my $d = $ids->{$vmid};
2665         next if !$d->{node} || $d->{node} ne $nodename;
2666         next if !$d->{type};
2667         if ($d->{type} eq 'openvz') {
2668             if ($have_pve_manager) {
2669                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2670                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2671                     $openvz->{$vmid} = $conf;
2672                 }
2673             }
2674         } elsif ($d->{type} eq 'qemu') {
2675             if ($have_qemu_server) {
2676                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2677                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2678                     $qemu->{$vmid} = $conf;
2679                 }
2680             }
2681         }
2682     }
2683
2684     return $vmdata;
2685 };
2686
2687 sub load_vmfw_conf {
2688     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2689
2690     my $vmfw_conf = {};
2691
2692     $dir = $pvefw_conf_dir if !defined($dir);
2693
2694     my $filename = "$dir/$vmid.fw";
2695     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2696         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2697         $vmfw_conf->{vmid} = $vmid;
2698     }
2699
2700     return $vmfw_conf;
2701 }
2702
2703 my $format_rules = sub {
2704     my ($rules, $allow_iface) = @_;
2705
2706     my $raw = '';
2707
2708     foreach my $rule (@$rules) {
2709         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2710             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2711             $raw .= uc($rule->{type});
2712             if ($rule->{macro}) {
2713                 $raw .= " $rule->{macro}($rule->{action})";
2714             } else {
2715                 $raw .= " " . $rule->{action};
2716             }
2717             if ($allow_iface && $rule->{iface}) {
2718                 $raw .= " -i $rule->{iface}";
2719             }
2720
2721             if ($rule->{type} ne  'group')  {
2722                 $raw .= " -source $rule->{source}" if $rule->{source};
2723                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2724                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2725                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2726                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2727             }
2728
2729             $raw .= " # " . encode('utf8', $rule->{comment})
2730                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2731             $raw .= "\n";
2732         } else {
2733             die "unknown rule type '$rule->{type}'";
2734         }
2735     }
2736
2737     return $raw;
2738 };
2739
2740 my $format_options = sub {
2741     my ($options) = @_;
2742
2743     my $raw = '';
2744
2745     $raw .= "[OPTIONS]\n\n";
2746     foreach my $opt (keys %$options) {
2747         $raw .= "$opt: $options->{$opt}\n";
2748     }
2749     $raw .= "\n";
2750
2751     return $raw;
2752 };
2753
2754 my $format_aliases = sub {
2755     my ($aliases) = @_;
2756
2757     my $raw = '';
2758
2759     $raw .= "[ALIASES]\n\n";
2760     foreach my $k (keys %$aliases) {
2761         my $e = $aliases->{$k};
2762         $raw .= "$e->{name} $e->{cidr}";
2763         $raw .= " # " . encode('utf8', $e->{comment})
2764             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2765         $raw .= "\n";
2766     }
2767     $raw .= "\n";
2768
2769     return $raw;
2770 };
2771
2772 my $format_ipsets = sub {
2773     my ($fw_conf) = @_;
2774
2775     my $raw = '';
2776
2777     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2778         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2779             my $utf8comment = encode('utf8', $comment);
2780             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2781         } else {
2782             $raw .= "[IPSET $ipset]\n\n";
2783         }
2784         my $options = $fw_conf->{ipset}->{$ipset};
2785
2786         my $nethash = {};
2787         foreach my $entry (@$options) {
2788             $nethash->{$entry->{cidr}} = $entry;
2789         }
2790
2791         foreach my $cidr (sort keys %$nethash) {
2792             my $entry = $nethash->{$cidr};
2793             my $line = $entry->{nomatch} ? '!' : '';
2794             $line .= $entry->{cidr};
2795             $line .= " # " . encode('utf8', $entry->{comment})
2796                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2797             $raw .= "$line\n";
2798         }
2799
2800         $raw .= "\n";
2801     }
2802
2803     return $raw;
2804 };
2805
2806 sub save_vmfw_conf {
2807     my ($vmid, $vmfw_conf) = @_;
2808
2809     my $raw = '';
2810
2811     my $options = $vmfw_conf->{options};
2812     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2813
2814     my $aliases = $vmfw_conf->{aliases};
2815     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2816
2817     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2818
2819     my $rules = $vmfw_conf->{rules} || [];
2820     if ($rules && scalar(@$rules)) {
2821         $raw .= "[RULES]\n\n";
2822         $raw .= &$format_rules($rules, 1);
2823         $raw .= "\n";
2824     }
2825
2826     mkdir $pvefw_conf_dir;
2827
2828     my $filename = "$pvefw_conf_dir/$vmid.fw";
2829     PVE::Tools::file_set_contents($filename, $raw);
2830 }
2831
2832 sub read_vm_firewall_configs {
2833     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2834
2835     my $vmfw_configs = {};
2836
2837     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2838         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2839         next if !$vmfw_conf->{options}; # skip if file does not exists
2840         $vmfw_configs->{$vmid} = $vmfw_conf;
2841     }
2842     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2843         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2844         next if !$vmfw_conf->{options}; # skip if file does not exists
2845         $vmfw_configs->{$vmid} = $vmfw_conf;
2846     }
2847
2848     return $vmfw_configs;
2849 }
2850
2851 sub get_option_log_level {
2852     my ($options, $k) = @_;
2853
2854     my $v = $options->{$k};
2855     $v = $default_log_level if !defined($v);
2856
2857     return undef if $v eq '' || $v eq 'nolog';
2858
2859     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2860
2861     return $v if ($v >= 0) && ($v <= 7);
2862
2863     warn "unknown log level ($k = '$v')\n";
2864
2865     return undef;
2866 }
2867
2868 sub generate_std_chains {
2869     my ($ruleset, $options, $ipversion) = @_;
2870
2871     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2872
2873     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2874
2875     my $chain;
2876
2877     if ($ipversion == 4) {
2878         # same as shorewall smurflog.
2879         $chain = 'PVEFW-smurflog';
2880         $std_chains->{$chain} = [];
2881
2882         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2883         push @{$std_chains->{$chain}}, "-j DROP";
2884     }
2885
2886     # same as shorewall logflags action.
2887     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2888     $chain = 'PVEFW-logflags';
2889     $std_chains->{$chain} = [];
2890
2891     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2892     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2893     push @{$std_chains->{$chain}}, "-j DROP";
2894
2895     foreach my $chain (keys %$std_chains) {
2896         ruleset_create_chain($ruleset, $chain);
2897         foreach my $rule (@{$std_chains->{$chain}}) {
2898             if (ref($rule)) {
2899                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2900             } else {
2901                 ruleset_addrule($ruleset, $chain, $rule);
2902             }
2903         }
2904     }
2905 }
2906
2907 sub generate_ipset_chains {
2908     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2909
2910     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2911
2912         my $options = $fw_conf->{ipset}->{$ipset};
2913
2914         # remove duplicates
2915         my $nethash = {};
2916         foreach my $entry (@$options) {
2917             next if $entry->{errors}; # skip entries with errors
2918             eval {
2919                 my ($cidr, $ver);
2920                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2921                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2922                 } else {
2923                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2924                 }
2925                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2926                 if ($ver == 6) {
2927                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2928                     $cidr = inet_ntop(AF_INET6, $ipv6);
2929                     $cidr =~ s|/128$||;
2930                 } else {
2931                     $cidr =~ s|/32$||;
2932                 }
2933
2934                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2935             };
2936             warn $@ if $@;
2937         }
2938
2939         foreach my $ipversion (4, 6) {
2940             my $data = $nethash->{$ipversion};
2941
2942             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2943
2944             my $hashsize = scalar(@$options);
2945             if ($hashsize <= 64) {
2946                 $hashsize = 64;
2947             } else {
2948                 $hashsize = round_powerof2($hashsize);
2949             }
2950
2951             my $family = $ipversion == "6" ? "inet6" : "inet";
2952
2953             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2954
2955             foreach my $cidr (sort keys %$data) {
2956                 my $entry = $data->{$cidr};
2957
2958                 my $cmd = "add $name $cidr";
2959                 if ($entry->{nomatch}) {
2960                     if ($feature_ipset_nomatch) {
2961                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2962                     } else {
2963                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2964                     }
2965                 } else {
2966                     push @{$ipset_ruleset->{$name}}, $cmd;
2967                 }
2968             }
2969         }
2970     }
2971 }
2972
2973 sub round_powerof2 {
2974     my ($int) = @_;
2975
2976     $int--;
2977     $int |= $int >> $_ foreach (1,2,4,8,16);
2978     return ++$int;
2979 }
2980
2981 sub load_clusterfw_conf {
2982     my ($filename, $verbose) = @_;
2983
2984     $filename = $clusterfw_conf_filename if !defined($filename);
2985
2986     my $cluster_conf = {};
2987     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2988         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2989     }
2990
2991     return $cluster_conf;
2992 }
2993
2994 sub save_clusterfw_conf {
2995     my ($cluster_conf) = @_;
2996
2997     my $raw = '';
2998
2999     my $options = $cluster_conf->{options};
3000     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3001
3002     my $aliases = $cluster_conf->{aliases};
3003     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3004
3005     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3006
3007     my $rules = $cluster_conf->{rules};
3008     if ($rules && scalar(@$rules)) {
3009         $raw .= "[RULES]\n\n";
3010         $raw .= &$format_rules($rules, 1);
3011         $raw .= "\n";
3012     }
3013
3014     if ($cluster_conf->{groups}) {
3015         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3016             my $rules = $cluster_conf->{groups}->{$group};
3017             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3018                 my $utf8comment = encode('utf8', $comment);
3019                 $raw .= "[group $group] # $utf8comment\n\n";
3020             } else {
3021                 $raw .= "[group $group]\n\n";
3022             }
3023
3024             $raw .= &$format_rules($rules, 0);
3025             $raw .= "\n";
3026         }
3027     }
3028
3029     mkdir $pvefw_conf_dir;
3030     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3031 }
3032
3033 sub load_hostfw_conf {
3034     my ($cluster_conf, $filename, $verbose) = @_;
3035
3036     $filename = $hostfw_conf_filename if !defined($filename);
3037
3038     my $hostfw_conf = {};
3039     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3040         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3041     }
3042     return $hostfw_conf;
3043 }
3044
3045 sub save_hostfw_conf {
3046     my ($hostfw_conf) = @_;
3047
3048     my $raw = '';
3049
3050     my $options = $hostfw_conf->{options};
3051     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3052
3053     my $rules = $hostfw_conf->{rules};
3054     if ($rules && scalar(@$rules)) {
3055         $raw .= "[RULES]\n\n";
3056         $raw .= &$format_rules($rules, 1);
3057         $raw .= "\n";
3058     }
3059
3060     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3061 }
3062
3063 sub compile {
3064     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3065
3066     my $vmfw_configs;
3067
3068     if ($vmdata) { # test mode
3069         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3070         my $filename = "$testdir/cluster.fw";
3071         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3072
3073         $filename = "$testdir/host.fw";
3074         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3075
3076         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3077     } else { # normal operation
3078         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3079
3080         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3081
3082         $vmdata = read_local_vm_config();
3083         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3084     }
3085
3086     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3087     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3088
3089     return ($ruleset, $ipset_ruleset, $rulesetv6);
3090 }
3091
3092 sub compile_iptables_filter {
3093     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3094
3095     $cluster_conf->{ipset}->{venet0} = [];
3096     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3097
3098     my $localnet;
3099     if ($cluster_conf->{aliases}->{local_network}) {
3100         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3101     } else {
3102         my $localnet_ver;
3103         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3104
3105         $cluster_conf->{aliases}->{local_network} = {
3106             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3107     }
3108
3109     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3110
3111     return ({}, {}) if !$cluster_conf->{options}->{enable};
3112
3113     my $ruleset = {};
3114
3115     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3116     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3117
3118     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3119
3120     my $hostfw_options = $hostfw_conf->{options} || {};
3121
3122     # fixme: what log level should we use here?
3123     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3124
3125     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3126
3127
3128     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3129     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3130     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3131
3132     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3133     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3134
3135     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3136
3137     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3138     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3139
3140     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3141     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3142
3143     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3144
3145     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3146
3147     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3148
3149     my $ipset_ruleset = {};
3150
3151     if ($hostfw_enable) {
3152         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3153         warn $@ if $@; # just to be sure - should not happen
3154     }
3155
3156     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3157
3158     # generate firewall rules for QEMU VMs
3159     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3160         eval {
3161             my $conf = $vmdata->{qemu}->{$vmid};
3162             my $vmfw_conf = $vmfw_configs->{$vmid};
3163             return if !$vmfw_conf;
3164
3165             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3166
3167             foreach my $netid (keys %$conf) {
3168                 next if $netid !~ m/^net(\d+)$/;
3169                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3170                 next if !$net->{firewall};
3171                 my $iface = "tap${vmid}i$1";
3172
3173                 my $macaddr = $net->{macaddr};
3174                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3175                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3176                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3177                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3178             }
3179         };
3180         warn $@ if $@; # just to be sure - should not happen
3181     }
3182
3183     # generate firewall rules for OpenVZ containers
3184     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3185         eval {
3186             my $conf = $vmdata->{openvz}->{$vmid};
3187
3188             my $vmfw_conf = $vmfw_configs->{$vmid};
3189             return if !$vmfw_conf;
3190
3191             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3192
3193             if ($vmfw_conf->{options}->{enable}) {
3194                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3195                     my $ip = $conf->{ip_address}->{value};
3196                     $ip =~ s/\s+/,/g;
3197
3198                     my @ips = ();
3199
3200                     foreach my $singleip (split(',', $ip)) {
3201                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3202                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3203                         push @ips, $singleip if $singleip_ver == $ipversion;
3204                     }
3205
3206                     if (scalar(@ips)) {
3207                         my $ip_list = join(',', @ips);
3208                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3209                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3210                     }
3211                 }
3212             }
3213
3214             if ($conf->{netif} && $conf->{netif}->{value}) {
3215                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3216                 foreach my $netid (keys %$netif) {
3217                     my $d = $netif->{$netid};
3218                     my $bridge = $d->{bridge};
3219                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3220                     my $macaddr = $d->{mac};
3221                     my $iface = $d->{host_ifname};
3222                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3223                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3224                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3225                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3226                 }
3227             }
3228         };
3229         warn $@ if $@; # just to be sure - should not happen
3230     }
3231
3232     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3233         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3234     }
3235
3236     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3237
3238     return ($ruleset, $ipset_ruleset);
3239 }
3240
3241 sub get_ruleset_status {
3242     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3243
3244     my $statushash = {};
3245
3246     foreach my $chain (sort keys %$ruleset) {
3247         my $sig = &$digest_fn($ruleset->{$chain});
3248
3249         $statushash->{$chain}->{sig} = $sig;
3250
3251         my $oldsig = $active_chains->{$chain};
3252         if (!defined($oldsig)) {
3253             $statushash->{$chain}->{action} = 'create';
3254         } else {
3255             if ($oldsig eq $sig) {
3256                 $statushash->{$chain}->{action} = 'exists';
3257             } else {
3258                 $statushash->{$chain}->{action} = 'update';
3259             }
3260         }
3261         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3262         foreach my $cmd (@{$ruleset->{$chain}}) {
3263             print "\t$cmd\n" if $verbose;
3264         }
3265     }
3266
3267     foreach my $chain (sort keys %$active_chains) {
3268         if (!defined($ruleset->{$chain})) {
3269             my $sig = $active_chains->{$chain};
3270             $statushash->{$chain}->{action} = 'delete';
3271             $statushash->{$chain}->{sig} = $sig;
3272             print "delete $chain ($sig)\n" if $verbose;
3273         }
3274     }
3275
3276     return $statushash;
3277 }
3278
3279 sub print_sig_rule {
3280     my ($chain, $sig) = @_;
3281
3282     # We just use this to store a SHA1 checksum used to detect changes
3283     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3284 }
3285
3286 sub get_ruleset_cmdlist {
3287     my ($ruleset, $verbose, $iptablescmd) = @_;
3288
3289     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3290
3291     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3292     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3293
3294     # create missing chains first
3295     foreach my $chain (sort keys %$ruleset) {
3296         my $stat = $statushash->{$chain};
3297         die "internal error" if !$stat;
3298         next if $stat->{action} ne 'create';
3299
3300         $cmdlist .= ":$chain - [0:0]\n";
3301     }
3302
3303     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3304         my $chain = "PVEFW-$h";
3305         if ($ruleset->{$chain} && !$hooks->{$h}) {
3306             $cmdlist .= "-A $h -j $chain\n";
3307         }
3308     }
3309
3310     foreach my $chain (sort keys %$ruleset) {
3311         my $stat = $statushash->{$chain};
3312         die "internal error" if !$stat;
3313
3314         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3315             $cmdlist .= "-F $chain\n";
3316             foreach my $cmd (@{$ruleset->{$chain}}) {
3317                 $cmdlist .= "$cmd\n";
3318             }
3319             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3320         } elsif ($stat->{action} eq 'delete') {
3321             die "internal error"; # this should not happen
3322         } elsif ($stat->{action} eq 'exists') {
3323             # do nothing
3324         } else {
3325             die "internal error - unknown status '$stat->{action}'";
3326         }
3327     }
3328
3329     foreach my $chain (keys %$statushash) {
3330         next if $statushash->{$chain}->{action} ne 'delete';
3331         $cmdlist .= "-F $chain\n";
3332     }
3333     foreach my $chain (keys %$statushash) {
3334         next if $statushash->{$chain}->{action} ne 'delete';
3335         next if $chain eq 'PVEFW-INPUT';
3336         next if $chain eq 'PVEFW-OUTPUT';
3337         next if $chain eq 'PVEFW-FORWARD';
3338         $cmdlist .= "-X $chain\n";
3339     }
3340
3341     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3342
3343     $cmdlist .= "COMMIT\n";
3344
3345     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3346 }
3347
3348 sub get_ipset_cmdlist {
3349     my ($ruleset, $verbose) = @_;
3350
3351     my $cmdlist = "";
3352
3353     my $delete_cmdlist = "";
3354
3355     my $active_chains = ipset_get_chains();
3356     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3357
3358     # remove stale _swap chains
3359     foreach my $chain (keys %$active_chains) {
3360         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3361             $cmdlist .= "destroy $chain\n";
3362         }
3363     }
3364
3365     foreach my $chain (keys %$ruleset) {
3366         my $stat = $statushash->{$chain};
3367         die "internal error" if !$stat;
3368
3369         if ($stat->{action} eq 'create') {
3370             foreach my $cmd (@{$ruleset->{$chain}}) {
3371                 $cmdlist .= "$cmd\n";
3372             }
3373         }
3374     }
3375
3376     foreach my $chain (keys %$ruleset) {
3377         my $stat = $statushash->{$chain};
3378         die "internal error" if !$stat;
3379
3380         if ($stat->{action} eq 'update') {
3381             my $chain_swap = $chain."_swap";
3382
3383             foreach my $cmd (@{$ruleset->{$chain}}) {
3384                 $cmd =~ s/$chain/$chain_swap/;
3385                 $cmdlist .= "$cmd\n";
3386             }
3387             $cmdlist .= "swap $chain_swap $chain\n";
3388             $cmdlist .= "flush $chain_swap\n";
3389             $cmdlist .= "destroy $chain_swap\n";
3390         }
3391     }
3392
3393      # the remove unused chains
3394     foreach my $chain (keys %$statushash) {
3395         next if $statushash->{$chain}->{action} ne 'delete';
3396
3397         $delete_cmdlist .= "flush $chain\n";
3398         $delete_cmdlist .= "destroy $chain\n";
3399     }
3400
3401     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3402
3403     return ($cmdlist, $delete_cmdlist, $changes);
3404 }
3405
3406 sub apply_ruleset {
3407     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3408
3409     enable_bridge_firewall();
3410
3411     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3412         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3413
3414     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3415     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3416
3417     if ($verbose) {
3418         if ($ipset_changes) {
3419             print "ipset changes:\n";
3420             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3421             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3422         }
3423
3424         if ($changes) {
3425             print "iptables changes:\n";
3426             print $cmdlist;
3427         }
3428
3429         if ($changesv6) {
3430             print "ip6tables changes:\n";
3431             print $cmdlistv6;
3432         }
3433     }
3434
3435     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3436     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3437
3438     ipset_restore_cmdlist($ipset_create_cmdlist);
3439
3440     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3441     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3442
3443     iptables_restore_cmdlist($cmdlist);
3444
3445     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3446     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3447
3448     ip6tables_restore_cmdlist($cmdlistv6);
3449
3450     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3451     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3452
3453     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3454
3455     # test: re-read status and check if everything is up to date
3456     my $active_chains = iptables_get_chains();
3457     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3458
3459     my $errors;
3460     foreach my $chain (sort keys %$ruleset) {
3461         my $stat = $statushash->{$chain};
3462         if ($stat->{action} ne 'exists') {
3463             warn "unable to update chain '$chain'\n";
3464             $errors = 1;
3465         }
3466     }
3467
3468     my $active_chainsv6 = iptables_get_chains("ip6tables");
3469     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3470
3471     foreach my $chain (sort keys %$rulesetv6) {
3472         my $stat = $statushashv6->{$chain};
3473         if ($stat->{action} ne 'exists') {
3474             warn "unable to update chain '$chain'\n";
3475             $errors = 1;
3476         }
3477     }
3478
3479     die "unable to apply firewall changes\n" if $errors;
3480
3481     update_nf_conntrack_max($hostfw_conf);
3482
3483     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3484
3485 }
3486
3487 sub update_nf_conntrack_max {
3488     my ($hostfw_conf) = @_;
3489
3490     my $max = 65536; # reasonable default
3491
3492     my $options = $hostfw_conf->{options} || {};
3493
3494     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3495         $max = $options->{nf_conntrack_max};
3496         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3497     }
3498
3499     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3500     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3501
3502     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3503
3504     if ($current != $max) {
3505         my $hashsize = int($max/4);
3506         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3507         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3508     }
3509 }
3510
3511 sub update_nf_conntrack_tcp_timeout_established {
3512     my ($hostfw_conf) = @_;
3513
3514     my $options = $hostfw_conf->{options} || {};
3515
3516     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3517
3518     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3519 }
3520
3521 sub remove_pvefw_chains {
3522
3523     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3524     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3525     PVE::Firewall::remove_pvefw_chains_ipset();
3526
3527 }
3528
3529 sub remove_pvefw_chains_iptables {
3530     my ($iptablescmd) = @_;
3531
3532     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3533     my $cmdlist = "*filter\n";
3534
3535     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3536         if ($hooks->{$h}) {
3537             $cmdlist .= "-D $h -j PVEFW-$h\n";
3538         }
3539     }
3540
3541     foreach my $chain (keys %$chash) {
3542         $cmdlist .= "-F $chain\n";
3543     }
3544
3545     foreach my $chain (keys %$chash) {
3546         $cmdlist .= "-X $chain\n";
3547     }
3548     $cmdlist .= "COMMIT\n";
3549
3550     if($iptablescmd eq "ip6tables") {
3551         ip6tables_restore_cmdlist($cmdlist);
3552     } else {
3553         iptables_restore_cmdlist($cmdlist);
3554     }
3555 }
3556
3557 sub remove_pvefw_chains_ipset {
3558
3559     my $ipset_chains = ipset_get_chains();
3560
3561     my $cmdlist = "";
3562
3563     foreach my $chain (keys %$ipset_chains) {
3564         $cmdlist .= "flush $chain\n";
3565         $cmdlist .= "destroy $chain\n";
3566     }
3567
3568     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3569 }
3570
3571 sub init {
3572     my $cluster_conf = load_clusterfw_conf();
3573     my $cluster_options = $cluster_conf->{options};
3574     my $enable = $cluster_options->{enable};
3575
3576     return if !$enable;
3577
3578     # load required modules here
3579 }
3580
3581 sub update {
3582     my $code = sub {
3583
3584         my $cluster_conf = load_clusterfw_conf();
3585         my $cluster_options = $cluster_conf->{options};
3586
3587         if (!$cluster_options->{enable}) {
3588             PVE::Firewall::remove_pvefw_chains();
3589             return;
3590         }
3591
3592         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3593
3594         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3595
3596         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3597     };
3598
3599     run_locked($code);
3600 }
3601
3602 1;