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