src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 145     ],
 146     'DHCPv6' => [
 147         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 148     ],
 149     'Trcrt' => [
 150         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 151         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 152     ],
 153  };
 154
 155 # imported/converted from: /usr/share/shorewall/macro.*
 156 my $pve_fw_macros = {
 157     'Amanda' => [
 158         "Amanda Backup",
 159         { action => 'PARAM', proto => 'udp', dport => '10080' },
 160         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 161     ],
 162     'Auth' => [
 163         "Auth (identd) traffic",
 164         { action => 'PARAM', proto => 'tcp', dport => '113' },
 165     ],
 166     'BGP' => [
 167         "Border Gateway Protocol traffic",
 168         { action => 'PARAM', proto => 'tcp', dport => '179' },
 169     ],
 170     'BitTorrent' => [
 171         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 172         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 173         { action => 'PARAM', proto => 'udp', dport => '6881' },
 174     ],
 175     'BitTorrent32' => [
 176         "BitTorrent traffic for BitTorrent 3.2 and later",
 177         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 178         { action => 'PARAM', proto => 'udp', dport => '6881' },
 179     ],
 180     'CVS' => [
 181         "Concurrent Versions System pserver traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 183     ],
 184     'Citrix' => [
 185         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 186         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 187         { action => 'PARAM', proto => 'udp', dport => '1604' },
 188         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 189     ],
 190     'DAAP' => [
 191         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 192         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 193         { action => 'PARAM', proto => 'udp', dport => '3689' },
 194     ],
 195     'DCC' => [
 196         "Distributed Checksum Clearinghouse spam filtering mechanism",
 197         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 198     ],
 199     'DHCPfwd' => [
 200         "Forwarded DHCP traffic",
 201         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 202     ],
 203     'DNS' => [
 204         "Domain Name System traffic (upd and tcp)",
 205         { action => 'PARAM', proto => 'udp', dport => '53' },
 206         { action => 'PARAM', proto => 'tcp', dport => '53' },
 207     ],
 208     'Distcc' => [
 209         "Distributed Compiler service",
 210         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 211     ],
 212     'FTP' => [
 213         "File Transfer Protocol",
 214         { action => 'PARAM', proto => 'tcp', dport => '21' },
 215     ],
 216     'Finger' => [
 217         "Finger protocol (RFC 742)",
 218         { action => 'PARAM', proto => 'tcp', dport => '79' },
 219     ],
 220     'GNUnet' => [
 221         "GNUnet secure peer-to-peer networking traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 223         { action => 'PARAM', proto => 'udp', dport => '2086' },
 224         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 225         { action => 'PARAM', proto => 'udp', dport => '1080' },
 226     ],
 227     'GRE' => [
 228         "Generic Routing Encapsulation tunneling protocol",
 229         { action => 'PARAM', proto => '47' },
 230     ],
 231     'Git' => [
 232         "Git distributed revision control traffic",
 233         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 234     ],
 235     'HKP' => [
 236         "OpenPGP HTTP keyserver protocol traffic",
 237         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 238     ],
 239     'HTTP' => [
 240         "Hypertext Transfer Protocol (WWW)",
 241         { action => 'PARAM', proto => 'tcp', dport => '80' },
 242     ],
 243     'HTTPS' => [
 244         "Hypertext Transfer Protocol (WWW) over SSL",
 245         { action => 'PARAM', proto => 'tcp', dport => '443' },
 246     ],
 247     'ICPV2' => [
 248         "Internet Cache Protocol V2 (Squid) traffic",
 249         { action => 'PARAM', proto => 'udp', dport => '3130' },
 250     ],
 251     'ICQ' => [
 252         "AOL Instant Messenger traffic",
 253         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 254     ],
 255     'IMAP' => [
 256         "Internet Message Access Protocol",
 257         { action => 'PARAM', proto => 'tcp', dport => '143' },
 258     ],
 259     'IMAPS' => [
 260         "Internet Message Access Protocol over SSL",
 261         { action => 'PARAM', proto => 'tcp', dport => '993' },
 262     ],
 263     'IPIP' => [
 264         "IPIP capsulation traffic",
 265         { action => 'PARAM', proto => '94' },
 266     ],
 267     'IPsec' => [
 268         "IPsec traffic",
 269         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 270         { action => 'PARAM', proto => '50' },
 271     ],
 272     'IPsecah' => [
 273         "IPsec authentication (AH) traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 275         { action => 'PARAM', proto => '51' },
 276     ],
 277     'IPsecnat' => [
 278         "IPsec traffic and Nat-Traversal",
 279         { action => 'PARAM', proto => 'udp', dport => '500' },
 280         { action => 'PARAM', proto => 'udp', dport => '4500' },
 281         { action => 'PARAM', proto => '50' },
 282     ],
 283     'IRC' => [
 284         "Internet Relay Chat traffic",
 285         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 286     ],
 287     'Jetdirect' => [
 288         "HP Jetdirect printing",
 289         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 290     ],
 291     'L2TP' => [
 292         "Layer 2 Tunneling Protocol traffic",
 293         { action => 'PARAM', proto => 'udp', dport => '1701' },
 294     ],
 295     'LDAP' => [
 296         "Lightweight Directory Access Protocol traffic",
 297         { action => 'PARAM', proto => 'tcp', dport => '389' },
 298     ],
 299     'LDAPS' => [
 300         "Secure Lightweight Directory Access Protocol traffic",
 301         { action => 'PARAM', proto => 'tcp', dport => '636' },
 302     ],
 303     'MSNP' => [
 304         "Microsoft Notification Protocol",
 305         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 306     ],
 307     'MSSQL' => [
 308         "Microsoft SQL Server",
 309         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 310     ],
 311     'Mail' => [
 312         "Mail traffic (SMTP, SMTPS, Submission)",
 313         { action => 'PARAM', proto => 'tcp', dport => '25' },
 314         { action => 'PARAM', proto => 'tcp', dport => '465' },
 315         { action => 'PARAM', proto => 'tcp', dport => '587' },
 316     ],
 317     'Munin' => [
 318         "Munin networked resource monitoring traffic",
 319         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 320     ],
 321     'MySQL' => [
 322         "MySQL server",
 323         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 324     ],
 325     'NNTP' => [
 326         "NNTP traffic (Usenet).",
 327         { action => 'PARAM', proto => 'tcp', dport => '119' },
 328     ],
 329     'NNTPS' => [
 330         "Encrypted NNTP traffic (Usenet)",
 331         { action => 'PARAM', proto => 'tcp', dport => '563' },
 332     ],
 333     'NTP' => [
 334         "Network Time Protocol (ntpd)",
 335         { action => 'PARAM', proto => 'udp', dport => '123' },
 336     ],
 337     'OSPF' => [
 338         "OSPF multicast traffic",
 339         { action => 'PARAM', proto => '89' },
 340     ],
 341     'OpenVPN' => [
 342         "OpenVPN traffic",
 343         { action => 'PARAM', proto => 'udp', dport => '1194' },
 344     ],
 345     'PCA' => [
 346         "Symantec PCAnywere (tm)",
 347         { action => 'PARAM', proto => 'udp', dport => '5632' },
 348         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 349     ],
 350     'POP3' => [
 351         "POP3 traffic",
 352         { action => 'PARAM', proto => 'tcp', dport => '110' },
 353     ],
 354     'POP3S' => [
 355         "Encrypted POP3 traffic",
 356         { action => 'PARAM', proto => 'tcp', dport => '995' },
 357     ],
 358     'PPtP' => [
 359         "Point-to-Point Tunneling Protocol",
 360         { action => 'PARAM', proto => '47' },
 361         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 362     ],
 363     'Ping' => [
 364         "ICMP echo request",
 365         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 366     ],
 367     'PostgreSQL' => [
 368         "PostgreSQL server",
 369         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 370     ],
 371     'Printer' => [
 372         "Line Printer protocol printing",
 373         { action => 'PARAM', proto => 'tcp', dport => '515' },
 374     ],
 375     'RDP' => [
 376         "Microsoft Remote Desktop Protocol traffic",
 377         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 378     ],
 379     'RIP' => [
 380         "Routing Information Protocol (bidirectional)",
 381         { action => 'PARAM', proto => 'udp', dport => '520' },
 382     ],
 383     'RNDC' => [
 384         "BIND remote management protocol",
 385         { action => 'PARAM', proto => 'tcp', dport => '953' },
 386     ],
 387     'Razor' => [
 388         "Razor Antispam System",
 389         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 390     ],
 391     'Rdate' => [
 392         "Remote time retrieval (rdate)",
 393         { action => 'PARAM', proto => 'tcp', dport => '37' },
 394     ],
 395     'Rsync' => [
 396         "Rsync server",
 397         { action => 'PARAM', proto => 'tcp', dport => '873' },
 398     ],
 399     'SANE' => [
 400         "SANE network scanning",
 401         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 402     ],
 403     'SMB' => [
 404         "Microsoft SMB traffic",
 405         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 406         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 407         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 408         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 409     ],
 410     'SMBswat' => [
 411         "Samba Web Administration Tool",
 412         { action => 'PARAM', proto => 'tcp', dport => '901' },
 413     ],
 414     'SMTP' => [
 415         "Simple Mail Transfer Protocol",
 416         { action => 'PARAM', proto => 'tcp', dport => '25' },
 417     ],
 418     'SMTPS' => [
 419         "Encrypted Simple Mail Transfer Protocol",
 420         { action => 'PARAM', proto => 'tcp', dport => '465' },
 421     ],
 422     'SNMP' => [
 423         "Simple Network Management Protocol",
 424         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 425         { action => 'PARAM', proto => 'tcp', dport => '161' },
 426     ],
 427     'SPAMD' => [
 428         "Spam Assassin SPAMD traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '783' },
 430     ],
 431     'SSH' => [
 432         "Secure shell traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '22' },
 434     ],
 435     'SVN' => [
 436         "Subversion server (svnserve)",
 437         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 438     ],
 439     'SixXS' => [
 440         "SixXS IPv6 Deployment and Tunnel Broker",
 441         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 442         { action => 'PARAM', proto => 'udp', dport => '3740' },
 443         { action => 'PARAM', proto => '41' },
 444         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 445     ],
 446     'Squid' => [
 447         "Squid web proxy traffic",
 448         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 449     ],
 450     'Submission' => [
 451         "Mail message submission traffic",
 452         { action => 'PARAM', proto => 'tcp', dport => '587' },
 453     ],
 454     'Syslog' => [
 455         "Syslog protocol (RFC 5424) traffic",
 456         { action => 'PARAM', proto => 'udp', dport => '514' },
 457         { action => 'PARAM', proto => 'tcp', dport => '514' },
 458     ],
 459     'TFTP' => [
 460         "Trivial File Transfer Protocol traffic",
 461         { action => 'PARAM', proto => 'udp', dport => '69' },
 462     ],
 463     'Telnet' => [
 464         "Telnet traffic",
 465         { action => 'PARAM', proto => 'tcp', dport => '23' },
 466     ],
 467     'Telnets' => [
 468         "Telnet over SSL",
 469         { action => 'PARAM', proto => 'tcp', dport => '992' },
 470     ],
 471     'Time' => [
 472         "RFC 868 Time protocol",
 473         { action => 'PARAM', proto => 'tcp', dport => '37' },
 474     ],
 475     'Trcrt' => [
 476         "Traceroute (for up to 30 hops) traffic",
 477         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 478         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 479     ],
 480     'VNC' => [
 481         "VNC traffic for VNC display's 0 - 99",
 482         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 483     ],
 484     'VNCL' => [
 485         "VNC traffic from Vncservers to Vncviewers in listen mode",
 486         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 487     ],
 488     'Web' => [
 489         "WWW traffic (HTTP and HTTPS)",
 490         { action => 'PARAM', proto => 'tcp', dport => '80' },
 491         { action => 'PARAM', proto => 'tcp', dport => '443' },
 492     ],
 493     'Webcache' => [
 494         "Web Cache/Proxy traffic (port 8080)",
 495         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 496     ],
 497     'Webmin' => [
 498         "Webmin traffic",
 499         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 500     ],
 501     'Whois' => [
 502         "Whois (nicname, RFC 3912) traffic",
 503         { action => 'PARAM', proto => 'tcp', dport => '43' },
 504     ],
 505 };
 506
 507 my $pve_fw_parsed_macros;
 508 my $pve_fw_macro_descr;
 509 my $pve_fw_preferred_macro_names = {};
 510
 511 my $pve_std_chains = {};
 512 $pve_std_chains->{4} = {
 513     'PVEFW-SET-ACCEPT-MARK' => [
 514         "-j MARK --set-mark 1",
 515     ],
 516     'PVEFW-DropBroadcast' => [
 517         # same as shorewall 'Broadcast'
 518         # simply DROP BROADCAST/MULTICAST/ANYCAST
 519         # we can use this to reduce logging
 520         { action => 'DROP', dsttype => 'BROADCAST' },
 521         { action => 'DROP', dsttype => 'MULTICAST' },
 522         { action => 'DROP', dsttype => 'ANYCAST' },
 523         { action => 'DROP', dest => '224.0.0.0/4' },
 524     ],
 525     'PVEFW-reject' => [
 526         # same as shorewall 'reject'
 527         { action => 'DROP', dsttype => 'BROADCAST' },
 528         { action => 'DROP', source => '224.0.0.0/4' },
 529         { action => 'DROP', proto => 'icmp' },
 530         "-p tcp -j REJECT --reject-with tcp-reset",
 531         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 532         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 533         "-j REJECT --reject-with icmp-host-prohibited",
 534     ],
 535     'PVEFW-Drop' => [
 536         # same as shorewall 'Drop', which is equal to DROP,
 537         # but REJECT/DROP some packages to reduce logging,
 538         # and ACCEPT critical ICMP types
 539         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 540         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 541         { action => 'PVEFW-DropBroadcast' },
 542         # ACCEPT critical ICMP types
 543         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 544         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 545         # Drop packets with INVALID state
 546         "-m conntrack --ctstate INVALID -j DROP",
 547         # Drop Microsoft SMB noise
 548         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 549         { action => 'DROP', proto => 'udp', dport => '137:139'},
 550         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 551         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 552         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 553         # Drop new/NotSyn traffic so that it doesn't get logged
 554         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 555         # Drop DNS replies
 556         { action => 'DROP', proto => 'udp', sport => 53 },
 557     ],
 558     'PVEFW-Reject' => [
 559         # same as shorewall 'Reject', which is equal to Reject,
 560         # but REJECT/DROP some packages to reduce logging,
 561         # and ACCEPT critical ICMP types
 562         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 563         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 564         { action => 'PVEFW-DropBroadcast' },
 565         # ACCEPT critical ICMP types
 566         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 567         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 568         # Drop packets with INVALID state
 569         "-m conntrack --ctstate INVALID -j DROP",
 570         # Drop Microsoft SMB noise
 571         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 572         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 574         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 575         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 576         # Drop new/NotSyn traffic so that it doesn't get logged
 577         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 578         # Drop DNS replies
 579         { action => 'DROP', proto => 'udp', sport => 53 },
 580     ],
 581     'PVEFW-tcpflags' => [
 582         # same as shorewall tcpflags action.
 583         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 584         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 585         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 586         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 588         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 589     ],
 590     'PVEFW-smurfs' => [
 591         # same as shorewall smurfs action
 592         # Filter packets for smurfs (packets with a broadcast address as the source).
 593         "-s 0.0.0.0/32 -j RETURN",
 594         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 595         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 596     ],
 597 };
 598
 599 $pve_std_chains->{6} = {
 600     'PVEFW-SET-ACCEPT-MARK' => [
 601         "-j MARK --set-mark 1",
 602     ],
 603     'PVEFW-DropBroadcast' => [
 604         # same as shorewall 'Broadcast'
 605         # simply DROP BROADCAST/MULTICAST/ANYCAST
 606         # we can use this to reduce logging
 607         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 608         # ipv6 addrtype does not work with kernel 2.6.32
 609         #{ action => 'DROP', dsttype => 'MULTICAST' },
 610         #{ action => 'DROP', dsttype => 'ANYCAST' },
 611         { action => 'DROP', dest => 'ff00::/8' },
 612         #{ action => 'DROP', dest => '224.0.0.0/4' },
 613     ],
 614     'PVEFW-reject' => [
 615         # same as shorewall 'reject'
 616         #{ action => 'DROP', dsttype => 'BROADCAST' },
 617         #{ action => 'DROP', source => '224.0.0.0/4' },
 618         { action => 'DROP', proto => 'icmpv6' },
 619         "-p tcp -j REJECT --reject-with tcp-reset",
 620         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 621         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 622         #"-j REJECT --reject-with icmp-host-prohibited",
 623     ],
 624     'PVEFW-Drop' => [
 625         # same as shorewall 'Drop', which is equal to DROP,
 626         # but REJECT/DROP some packages to reduce logging,
 627         # and ACCEPT critical ICMP types
 628         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 629         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 630         { action => 'PVEFW-DropBroadcast' },
 631         # ACCEPT critical ICMP types
 632         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 633         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 635
 636         # Drop packets with INVALID state
 637         "-m conntrack --ctstate INVALID -j DROP",
 638         # Drop Microsoft SMB noise
 639         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 640         { action => 'DROP', proto => 'udp', dport => '137:139'},
 641         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 642         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 643         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 644         # Drop new/NotSyn traffic so that it doesn't get logged
 645         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 646         # Drop DNS replies
 647         { action => 'DROP', proto => 'udp', sport => 53 },
 648     ],
 649     'PVEFW-Reject' => [
 650         # same as shorewall 'Reject', which is equal to Reject,
 651         # but REJECT/DROP some packages to reduce logging,
 652         # and ACCEPT critical ICMP types
 653         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 654         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 655         { action => 'PVEFW-DropBroadcast' },
 656         # ACCEPT critical ICMP types
 657         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 658         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 660
 661         # Drop packets with INVALID state
 662         "-m conntrack --ctstate INVALID -j DROP",
 663         # Drop Microsoft SMB noise
 664         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 665         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 667         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 668         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 669         # Drop new/NotSyn traffic so that it doesn't get logged
 670         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 671         # Drop DNS replies
 672         { action => 'DROP', proto => 'udp', sport => 53 },
 673     ],
 674     'PVEFW-tcpflags' => [
 675         # same as shorewall tcpflags action.
 676         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 677         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 678         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 679         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 681         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 682     ],
 683 };
 684
 685 # iptables -p icmp -h
 686 my $icmp_type_names = {
 687     any => 1,
 688     'echo-reply' => 1,
 689     'destination-unreachable' => 1,
 690     'network-unreachable' => 1,
 691     'host-unreachable' => 1,
 692     'protocol-unreachable' => 1,
 693     'port-unreachable' => 1,
 694     'fragmentation-needed' => 1,
 695     'source-route-failed' => 1,
 696     'network-unknown' => 1,
 697     'host-unknown' => 1,
 698     'network-prohibited' => 1,
 699     'host-prohibited' => 1,
 700     'TOS-network-unreachable' => 1,
 701     'TOS-host-unreachable' => 1,
 702     'communication-prohibited' => 1,
 703     'host-precedence-violation' => 1,
 704     'precedence-cutoff' => 1,
 705     'source-quench' => 1,
 706     'redirect' => 1,
 707     'network-redirect' => 1,
 708     'host-redirect' => 1,
 709     'TOS-network-redirect' => 1,
 710     'TOS-host-redirect' => 1,
 711     'echo-request' => 1,
 712     'router-advertisement' => 1,
 713     'router-solicitation' => 1,
 714     'time-exceeded' => 1,
 715     'ttl-zero-during-transit' => 1,
 716     'ttl-zero-during-reassembly' => 1,
 717     'parameter-problem' => 1,
 718     'ip-header-bad' => 1,
 719     'required-option-missing' => 1,
 720     'timestamp-request' => 1,
 721     'timestamp-reply' => 1,
 722     'address-mask-request' => 1,
 723     'address-mask-reply' => 1,
 724 };
 725
 726 # ip6tables -p icmpv6 -h
 727
 728 my $icmpv6_type_names = {
 729     'any' => 1,
 730     'destination-unreachable' => 1,
 731     'no-route' => 1,
 732     'communication-prohibited' => 1,
 733     'address-unreachable' => 1,
 734     'port-unreachable' => 1,
 735     'packet-too-big' => 1,
 736     'time-exceeded' => 1,
 737     'ttl-zero-during-transit' => 1,
 738     'ttl-zero-during-reassembly' => 1,
 739     'parameter-problem' => 1,
 740     'bad-header' => 1,
 741     'unknown-header-type' => 1,
 742     'unknown-option' => 1,
 743     'echo-request' => 1,
 744     'echo-reply' => 1,
 745     'router-solicitation' => 1,
 746     'router-advertisement' => 1,
 747     'neighbor-solicitation' => 1,
 748     'neighbour-solicitation' => 1,
 749     'neighbor-advertisement' => 1,
 750     'neighbour-advertisement' => 1,
 751     'redirect' => 1,
 752 };
 753
 754 sub init_firewall_macros {
 755
 756     $pve_fw_parsed_macros = {};
 757
 758     foreach my $k (keys %$pve_fw_macros) {
 759         my $lc_name = lc($k);
 760         my $macro = $pve_fw_macros->{$k};
 761         if (!ref($macro->[0])) {
 762             $pve_fw_macro_descr->{$k} = shift @$macro;
 763         }
 764         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 765         $pve_fw_parsed_macros->{$k} = $macro;
 766     }
 767 }
 768
 769 init_firewall_macros();
 770
 771 sub get_macros {
 772     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 773 }
 774
 775 my $etc_services;
 776
 777 sub get_etc_services {
 778
 779     return $etc_services if $etc_services;
 780
 781     my $filename = "/etc/services";
 782
 783     my $fh = IO::File->new($filename, O_RDONLY);
 784     if (!$fh) {
 785         warn "unable to read '$filename' - $!\n";
 786         return {};
 787     }
 788
 789     my $services = {};
 790
 791     while (my $line = <$fh>) {
 792         chomp ($line);
 793         next if $line =~m/^#/;
 794         next if ($line =~m/^\s*$/);
 795
 796         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 797             $services->{byid}->{$2}->{name} = $1;
 798             $services->{byid}->{$2}->{port} = $2;
 799             $services->{byid}->{$2}->{$3} = 1;
 800             $services->{byname}->{$1} = $services->{byid}->{$2};
 801         }
 802     }
 803
 804     close($fh);
 805
 806     $etc_services = $services;
 807
 808
 809     return $etc_services;
 810 }
 811
 812 my $etc_protocols;
 813
 814 sub get_etc_protocols {
 815     return $etc_protocols if $etc_protocols;
 816
 817     my $filename = "/etc/protocols";
 818
 819     my $fh = IO::File->new($filename, O_RDONLY);
 820     if (!$fh) {
 821         warn "unable to read '$filename' - $!\n";
 822         return {};
 823     }
 824
 825     my $protocols = {};
 826
 827     while (my $line = <$fh>) {
 828         chomp ($line);
 829         next if $line =~m/^#/;
 830         next if ($line =~m/^\s*$/);
 831
 832         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 833             $protocols->{byid}->{$2}->{name} = $1;
 834             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 835         }
 836     }
 837
 838     close($fh);
 839
 840     # add special case for ICMP v6
 841     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 842     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 843
 844     $etc_protocols = $protocols;
 845
 846     return $etc_protocols;
 847 }
 848
 849 my $ipv4_mask_hash_localnet = {
 850     '255.255.0.0' => 16,
 851     '255.255.128.0' => 17,
 852     '255.255.192.0' => 18,
 853     '255.255.224.0' => 19,
 854     '255.255.240.0' => 20,
 855     '255.255.248.0' => 21,
 856     '255.255.252.0' => 22,
 857     '255.255.254.0' => 23,
 858     '255.255.255.0' => 24,
 859     '255.255.255.128' => 25,
 860     '255.255.255.192' => 26,
 861     '255.255.255.224' => 27,
 862     '255.255.255.240' => 28,
 863     '255.255.255.248' => 29,
 864     '255.255.255.252' => 30,
 865 };
 866
 867 my $__local_network;
 868
 869 sub local_network {
 870     my ($new_value) = @_;
 871
 872     $__local_network = $new_value if defined($new_value);
 873
 874     return $__local_network if defined($__local_network);
 875
 876     eval {
 877         my $nodename = PVE::INotify::nodename();
 878
 879         my $ip = PVE::Cluster::remote_node_ip($nodename);
 880
 881         my $testip = Net::IP->new($ip);
 882
 883         my $routes = PVE::ProcFSTools::read_proc_net_route();
 884         foreach my $entry (@$routes) {
 885             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 886             next if !defined($mask);
 887             return if $mask eq '0.0.0.0';
 888             my $cidr = "$entry->{dest}/$mask";
 889             my $testnet = Net::IP->new($cidr);
 890             if ($testnet->overlaps($testip)) {
 891                 $__local_network = $cidr;
 892                 return;
 893             }
 894         }
 895     };
 896     warn $@ if $@;
 897
 898     return $__local_network;
 899 }
 900
 901 # ipset names are limited to 31 characters,
 902 # and we use '-v4' or '-v6' to indicate IP versions,
 903 # and we use '_swap' suffix for atomic update,
 904 # for example PVEFW-${VMID}-${ipset_name}_swap
 905
 906 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 907
 908 sub compute_ipset_chain_name {
 909     my ($vmid, $ipset_name, $ipversion) = @_;
 910
 911     $vmid = 0 if !defined($vmid);
 912
 913     my $id = "$vmid-${ipset_name}-v$ipversion";
 914
 915     if (length($id) > $max_iptables_ipset_name_length) {
 916         $id = PVE::Tools::fnv31a_hex($id);
 917     }
 918
 919     return "PVEFW-$id";
 920 }
 921
 922 sub compute_ipfilter_ipset_name {
 923     my ($iface) = @_;
 924
 925     return "ipfilter-$iface";
 926 }
 927
 928 sub parse_address_list {
 929     my ($str) = @_;
 930
 931     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 932         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 933         return;
 934     }
 935
 936     if ($str =~ m/^${ip_alias_pattern}$/) {
 937         die "alias name too long\n" if length($str) > $max_alias_name_length;
 938         return;
 939     }
 940
 941     my $count = 0;
 942     my $iprange = 0;
 943     my $ipversion;
 944
 945     foreach my $elem (split(/,/, $str)) {
 946         $count++;
 947         my $ip = Net::IP->new($elem);
 948         if (!$ip) {
 949             my $err = Net::IP::Error();
 950             die "invalid IP address: $err\n";
 951         }
 952         $iprange = 1 if $elem =~ m/-/;
 953
 954         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 955
 956         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 957             if $ipversion && ($new_ipversion != $ipversion);
 958
 959         $ipversion = $new_ipversion;
 960     }
 961
 962     die "you can't use a range in a list\n" if $iprange && $count > 1;
 963
 964     return $ipversion;
 965 }
 966
 967 sub parse_port_name_number_or_range {
 968     my ($str) = @_;
 969
 970     my $services = PVE::Firewall::get_etc_services();
 971     my $count = 0;
 972     my $icmp_port = 0;
 973
 974     foreach my $item (split(/,/, $str)) {
 975         $count++;
 976         if ($item =~ m/^(\d+):(\d+)$/) {
 977             my ($port1, $port2) = ($1, $2);
 978             die "invalid port '$port1'\n" if $port1 > 65535;
 979             die "invalid port '$port2'\n" if $port2 > 65535;
 980         } elsif ($item =~ m/^(\d+)$/) {
 981             my $port = $1;
 982             die "invalid port '$port'\n" if $port > 65535;
 983         } else {
 984             if ($icmp_type_names->{$item}) {
 985                 $icmp_port = 1;
 986             } elsif ($icmpv6_type_names->{$item}) {
 987                 $icmp_port = 1;
 988             } else {
 989                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 990             }
 991         }
 992     }
 993
 994     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 995
 996     return $count;
 997 }
 998
 999 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
1000 sub pve_fw_verify_port_spec {
1001    my ($portstr) = @_;
1002
1003    parse_port_name_number_or_range($portstr);
1004
1005    return $portstr;
1006 }
1007
1008 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1009 sub pve_fw_verify_addr_spec {
1010    my ($list) = @_;
1011
1012    parse_address_list($list);
1013
1014    return $list;
1015 }
1016
1017 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1018 sub pve_fw_verify_protocol_spec {
1019    my ($proto) = @_;
1020
1021    my $protocols = get_etc_protocols();
1022
1023    die "unknown protocol '$proto'\n" if $proto &&
1024        !(defined($protocols->{byname}->{$proto}) ||
1025          defined($protocols->{byid}->{$proto}));
1026
1027    return $proto;
1028 }
1029
1030
1031 # helper function for API
1032
1033 sub copy_opject_with_digest {
1034     my ($object) = @_;
1035
1036     my $sha = Digest::SHA->new('sha1');
1037
1038     my $res = {};
1039     foreach my $k (sort keys %$object) {
1040         my $v = $object->{$k};
1041         next if !defined($v);
1042         $res->{$k} = $v;
1043         $sha->add($k, ':', $v, "\n");
1044     }
1045
1046     my $digest = $sha->hexdigest;
1047
1048     $res->{digest} = $digest;
1049
1050     return wantarray ? ($res, $digest) : $res;
1051 }
1052
1053 sub copy_list_with_digest {
1054     my ($list) = @_;
1055
1056     my $sha = Digest::SHA->new('sha1');
1057
1058     my $res = [];
1059     foreach my $entry (@$list) {
1060         my $data = {};
1061         foreach my $k (sort keys %$entry) {
1062             my $v = $entry->{$k};
1063             next if !defined($v);
1064             $data->{$k} = $v;
1065             # Note: digest ignores refs ($rule->{errors})
1066             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1067         }
1068         push @$res, $data;
1069     }
1070
1071     my $digest = $sha->hexdigest;
1072
1073     foreach my $entry (@$res) {
1074         $entry->{digest} = $digest;
1075     }
1076
1077     return wantarray ? ($res, $digest) : $res;
1078 }
1079
1080 my $rule_properties = {
1081     pos => {
1082         description => "Update rule at position <pos>.",
1083         type => 'integer',
1084         minimum => 0,
1085         optional => 1,
1086     },
1087     digest => get_standard_option('pve-config-digest'),
1088     type => {
1089         type => 'string',
1090         optional => 1,
1091         enum => ['in', 'out', 'group'],
1092     },
1093     action => {
1094         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1095         type => 'string',
1096         optional => 1,
1097         pattern => $security_group_name_pattern,
1098         maxLength => 20,
1099         minLength => 2,
1100     },
1101     macro => {
1102         type => 'string',
1103         optional => 1,
1104         maxLength => 128,
1105     },
1106     iface => get_standard_option('pve-iface', { optional => 1 }),
1107     source => {
1108         type => 'string', format => 'pve-fw-addr-spec',
1109         optional => 1,
1110     },
1111     dest => {
1112         type => 'string', format => 'pve-fw-addr-spec',
1113         optional => 1,
1114     },
1115     proto => {
1116         type => 'string', format => 'pve-fw-protocol-spec',
1117         optional => 1,
1118     },
1119     enable => {
1120         type => 'boolean',
1121         optional => 1,
1122     },
1123     sport => {
1124         type => 'string', format => 'pve-fw-port-spec',
1125         optional => 1,
1126     },
1127     dport => {
1128         type => 'string', format => 'pve-fw-port-spec',
1129         optional => 1,
1130     },
1131     comment => {
1132         type => 'string',
1133         optional => 1,
1134     },
1135 };
1136
1137 sub add_rule_properties {
1138     my ($properties) = @_;
1139
1140     foreach my $k (keys %$rule_properties) {
1141         my $h = $rule_properties->{$k};
1142         # copy data, so that we can modify later without side effects
1143         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1144     }
1145
1146     return $properties;
1147 }
1148
1149 sub delete_rule_properties {
1150     my ($rule, $delete_str) = @_;
1151
1152     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1153         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1154             if !defined($rule_properties->{$opt});
1155         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1156             if $opt eq 'type' || $opt eq 'action';
1157         delete $rule->{$opt};
1158     }
1159
1160     return $rule;
1161 }
1162
1163 my $apply_macro = sub {
1164     my ($macro_name, $param, $verify, $ipversion) = @_;
1165
1166     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1167     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1168
1169     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1170         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1171     }
1172
1173     my $rules = [];
1174
1175     foreach my $templ (@$macro_rules) {
1176         my $rule = {};
1177         my $param_used = {};
1178         foreach my $k (keys %$templ) {
1179             my $v = $templ->{$k};
1180             if ($v eq 'PARAM') {
1181                 $v = $param->{$k};
1182                 $param_used->{$k} = 1;
1183             } elsif ($v eq 'DEST') {
1184                 $v = $param->{dest};
1185                 $param_used->{dest} = 1;
1186             } elsif ($v eq 'SOURCE') {
1187                 $v = $param->{source};
1188                 $param_used->{source} = 1;
1189             }
1190
1191             if (!defined($v)) {
1192                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1193                 raise_param_exc({ macro => $msg }) if $verify;
1194                 die "$msg\n";
1195             }
1196             $rule->{$k} = $v;
1197         }
1198         foreach my $k (keys %$param) {
1199             next if $k eq 'macro';
1200             next if !defined($param->{$k});
1201             next if $param_used->{$k};
1202             if (defined($rule->{$k})) {
1203                 if ($rule->{$k} ne $param->{$k}) {
1204                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1205                     raise_param_exc({ $k => $msg }) if $verify;
1206                     die "$msg\n";
1207                 }
1208             } else {
1209                 $rule->{$k} = $param->{$k};
1210             }
1211         }
1212         push @$rules, $rule;
1213     }
1214
1215     return $rules;
1216 };
1217
1218 my $rule_env_iface_lookup = {
1219     'ct' => 1,
1220     'vm' => 1,
1221     'group' => 0,
1222     'cluster' => 1,
1223     'host' => 1,
1224 };
1225
1226 sub verify_rule {
1227     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1228
1229     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1230
1231     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1232     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1233
1234     my $errors = $rule->{errors} || {};
1235
1236     my $error_count = 0;
1237
1238     my $add_error = sub {
1239         my ($param, $msg)  = @_;
1240         chomp $msg;
1241         raise_param_exc({ $param => $msg }) if !$noerr;
1242         $error_count++;
1243         $errors->{$param} = $msg if !$errors->{$param};
1244     };
1245
1246     my $ipversion;
1247     my $set_ip_version = sub {
1248         my $vers = shift;
1249         if ($vers) {
1250             die "detected mixed ipv4/ipv6 adresses in rule\n"
1251                 if $ipversion && ($vers != $ipversion);
1252             $ipversion = $vers;
1253         }
1254     };
1255
1256     my $check_ipset_or_alias_property = sub {
1257         my ($name, $expected_ipversion) = @_;
1258
1259         if (my $value = $rule->{$name}) {
1260             if ($value =~ m/^\+/) {
1261                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1262                     &$add_error($name, "no such ipset '$1'")
1263                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1264
1265                 } else {
1266                     &$add_error($name, "invalid ipset name '$value'");
1267                 }
1268             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1269                 my $alias = lc($value);
1270                 &$add_error($name, "no such alias '$value'")
1271                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1272                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1273                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1274
1275                 &$set_ip_version($e->{ipversion});
1276             }
1277         }
1278     };
1279
1280     my $type = $rule->{type};
1281     my $action = $rule->{action};
1282
1283     &$add_error('type', "missing property") if !$type;
1284     &$add_error('action', "missing property") if !$action;
1285
1286     if ($type) {
1287         if ($type eq  'in' || $type eq 'out') {
1288             &$add_error('action', "unknown action '$action'")
1289                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1290         } elsif ($type eq 'group') {
1291             &$add_error('type', "security groups not allowed")
1292                 if !$allow_groups;
1293             &$add_error('action', "invalid characters in security group name")
1294                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1295         } else {
1296             &$add_error('type', "unknown rule type '$type'");
1297         }
1298     }
1299
1300     if ($rule->{iface}) {
1301         &$add_error('type', "parameter -i not allowed for this rule type")
1302             if !$allow_iface;
1303         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1304         &$add_error('iface', $@) if $@;
1305         if ($rule_env eq 'vm') {
1306             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1307                 if $rule->{iface} !~  m/^net(\d+)$/;
1308         } elsif ($rule_env eq 'ct') {
1309             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1310                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1311         }
1312     }
1313
1314     if ($rule->{macro}) {
1315         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1316             $rule->{macro} = $preferred_name;
1317         } else {
1318             &$add_error('macro', "unknown macro '$rule->{macro}'");
1319         }
1320     }
1321
1322     if ($rule->{proto}) {
1323         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1324         &$add_error('proto', $@) if $@;
1325         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1326         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1327     }
1328
1329     if ($rule->{dport}) {
1330         eval { parse_port_name_number_or_range($rule->{dport}); };
1331         &$add_error('dport', $@) if $@;
1332         &$add_error('proto', "missing property - 'dport' requires this property")
1333             if !$rule->{proto};
1334     }
1335
1336     if ($rule->{sport}) {
1337         eval { parse_port_name_number_or_range($rule->{sport}); };
1338         &$add_error('sport', $@) if $@;
1339         &$add_error('proto', "missing property - 'sport' requires this property")
1340             if !$rule->{proto};
1341     }
1342
1343     if ($rule->{source}) {
1344         eval {
1345             my $source_ipversion = parse_address_list($rule->{source});
1346             &$set_ip_version($source_ipversion);
1347         };
1348         &$add_error('source', $@) if $@;
1349         &$check_ipset_or_alias_property('source', $ipversion);
1350     }
1351
1352     if ($rule->{dest}) {
1353         eval {
1354             my $dest_ipversion = parse_address_list($rule->{dest});
1355             &$set_ip_version($dest_ipversion);
1356         };
1357         &$add_error('dest', $@) if $@;
1358         &$check_ipset_or_alias_property('dest', $ipversion);
1359     }
1360
1361     $rule->{ipversion} = $ipversion if $ipversion;
1362
1363     if ($rule->{macro} && !$error_count) {
1364         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1365         if (my $err = $@) {
1366             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1367                 my $eh = $err->{errors};
1368                 foreach my $p (keys %$eh) {
1369                     &$add_error($p, $eh->{$p});
1370                 }
1371             } else {
1372                 &$add_error('macro', "$err");
1373             }
1374         }
1375     }
1376
1377     $rule->{errors} = $errors if $error_count;
1378
1379     return $rule;
1380 }
1381
1382 sub copy_rule_data {
1383     my ($rule, $param) = @_;
1384
1385     foreach my $k (keys %$rule_properties) {
1386         if (defined(my $v = $param->{$k})) {
1387             if ($v eq '' || $v eq '-') {
1388                 delete $rule->{$k};
1389             } else {
1390                 $rule->{$k} = $v;
1391             }
1392         }
1393     }
1394
1395     return $rule;
1396 }
1397
1398 sub rules_modify_permissions {
1399     my ($rule_env) = @_;
1400
1401     if ($rule_env eq 'host') {
1402         return {
1403             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1404         };
1405     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1406         return {
1407             check => ['perm', '/', [ 'Sys.Modify' ]],
1408         };
1409     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1410         return {
1411             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1412         }
1413     }
1414
1415     return undef;
1416 }
1417
1418 sub rules_audit_permissions {
1419     my ($rule_env) = @_;
1420
1421     if ($rule_env eq 'host') {
1422         return {
1423             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1424         };
1425     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1426         return {
1427             check => ['perm', '/', [ 'Sys.Audit' ]],
1428         };
1429     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1430         return {
1431             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1432         }
1433     }
1434
1435     return undef;
1436 }
1437
1438 # core functions
1439 my $bridge_firewall_enabled = 0;
1440
1441 sub enable_bridge_firewall {
1442
1443     return if $bridge_firewall_enabled; # only once
1444
1445     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1446     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1447
1448     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1449     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1450
1451     $bridge_firewall_enabled = 1;
1452 }
1453
1454 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1455
1456 sub iptables_restore_cmdlist {
1457     my ($cmdlist) = @_;
1458
1459     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1460 }
1461
1462 sub ip6tables_restore_cmdlist {
1463     my ($cmdlist) = @_;
1464
1465     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1466 }
1467
1468 sub ipset_restore_cmdlist {
1469     my ($cmdlist) = @_;
1470
1471     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1472 }
1473
1474 sub iptables_get_chains {
1475     my ($iptablescmd) = @_;
1476
1477     $iptablescmd = "iptables" if !$iptablescmd;
1478
1479     my $res = {};
1480
1481     # check what chains we want to track
1482     my $is_pvefw_chain = sub {
1483         my $name = shift;
1484
1485         return 1 if $name =~ m/^PVEFW-\S+$/;
1486
1487         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1488
1489         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1490
1491         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1492
1493         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1494         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1495
1496         return undef;
1497     };
1498
1499     my $table = '';
1500
1501     my $hooks = {};
1502
1503     my $parser = sub {
1504         my $line = shift;
1505
1506         return if $line =~ m/^#/;
1507         return if $line =~ m/^\s*$/;
1508
1509         if ($line =~ m/^\*(\S+)$/) {
1510             $table = $1;
1511             return;
1512         }
1513
1514         return if $table ne 'filter';
1515
1516         if ($line =~ m/^:(\S+)\s/) {
1517             my $chain = $1;
1518             return if !&$is_pvefw_chain($chain);
1519             $res->{$chain} = "unknown";
1520         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1521             my ($chain, $sig) = ($1, $2);
1522             return if !&$is_pvefw_chain($chain);
1523             $res->{$chain} = $sig;
1524         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1525             $hooks->{$1} = 1;
1526         } else {
1527             # simply ignore the rest
1528             return;
1529         }
1530     };
1531
1532     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1533
1534     return wantarray ? ($res, $hooks) : $res;
1535 }
1536
1537 sub iptables_chain_digest {
1538     my ($rules) = @_;
1539     my $digest = Digest::SHA->new('sha1');
1540     foreach my $rule (@$rules) { # order is important
1541         $digest->add($rule);
1542     }
1543     return $digest->b64digest;
1544 }
1545
1546 sub ipset_chain_digest {
1547     my ($rules) = @_;
1548
1549     my $digest = Digest::SHA->new('sha1');
1550     foreach my $rule (sort @$rules) { # note: sorted
1551         $digest->add($rule);
1552     }
1553     return $digest->b64digest;
1554 }
1555
1556 sub ipset_get_chains {
1557
1558     my $res = {};
1559     my $chains = {};
1560
1561     my $parser = sub {
1562         my $line = shift;
1563
1564         return if $line =~ m/^#/;
1565         return if $line =~ m/^\s*$/;
1566         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1567             my $chain = $1;
1568             $line =~ s/\s+$//; # delete trailing white space
1569             push @{$chains->{$chain}}, $line;
1570         } else {
1571             # simply ignore the rest
1572             return;
1573         }
1574     };
1575
1576     run_command("/usr/sbin/ipset save", outfunc => $parser);
1577
1578     # compute digest for each chain
1579     foreach my $chain (keys %$chains) {
1580         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1581     }
1582
1583     return $res;
1584 }
1585
1586 sub ruleset_generate_cmdstr {
1587     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1588
1589     return if defined($rule->{enable}) && !$rule->{enable};
1590     return if $rule->{errors};
1591
1592     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1593
1594     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1595     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1596
1597     my @cmd = ();
1598
1599     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1600     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1601
1602     my $source = $rule->{source};
1603     my $dest = $rule->{dest};
1604
1605     if ($source) {
1606         if ($source =~ m/^\+/) {
1607             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1608                 my $name = $1;
1609                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1610                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1611                     push @cmd, "-m set --match-set ${ipset_chain} src";
1612                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1613                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1614                     push @cmd, "-m set --match-set ${ipset_chain} src";
1615                 } else {
1616                     die "no such ipset '$name'\n";
1617                 }
1618             } else {
1619                 die "invalid security group name '$source'\n";
1620             }
1621         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1622             my $alias = lc($source);
1623             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1624             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1625             die "no such alias '$source'\n" if !$e;
1626             push @cmd, "-s $e->{cidr}";
1627         } elsif ($source =~ m/\-/){
1628             push @cmd, "-m iprange --src-range $source";
1629         } else {
1630             push @cmd, "-s $source";
1631         }
1632     }
1633
1634     if ($dest) {
1635         if ($dest =~ m/^\+/) {
1636             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1637                 my $name = $1;
1638                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1639                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1640                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1641                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1642                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1643                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1644                 } else {
1645                     die "no such ipset '$name'\n";
1646                 }
1647             } else {
1648                 die "invalid security group name '$dest'\n";
1649             }
1650         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1651             my $alias = lc($dest);
1652             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1653             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1654             die "no such alias '$dest'\n" if !$e;
1655             push @cmd, "-d $e->{cidr}";
1656         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1657             push @cmd, "-m iprange --dst-range $dest";
1658         } else {
1659             push @cmd, "-d $dest";
1660         }
1661     }
1662
1663     if ($rule->{proto}) {
1664         push @cmd, "-p $rule->{proto}";
1665
1666         my $multiport = 0;
1667         $multiport++ if $nbdport > 1;
1668         $multiport++ if $nbsport > 1;
1669
1670         push @cmd, "--match multiport" if $multiport;
1671
1672         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1673             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1674
1675         if ($rule->{dport}) {
1676             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1677                 # Note: we use dport to store --icmp-type
1678                 die "unknown icmp-type '$rule->{dport}'\n"
1679                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1680                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1681             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1682                 # Note: we use dport to store --icmpv6-type
1683                 die "unknown icmpv6-type '$rule->{dport}'\n"
1684                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1685                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1686             } else {
1687                 if ($nbdport > 1) {
1688                     if ($multiport == 2) {
1689                         push @cmd,  "--ports $rule->{dport}";
1690                     } else {
1691                         push @cmd, "--dports $rule->{dport}";
1692                     }
1693                 } else {
1694                     push @cmd, "--dport $rule->{dport}";
1695                 }
1696             }
1697         }
1698
1699         if ($rule->{sport}) {
1700             if ($nbsport > 1) {
1701                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1702             } else {
1703                 push @cmd, "--sport $rule->{sport}";
1704             }
1705         }
1706     } elsif ($rule->{dport} || $rule->{sport}) {
1707         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1708         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1709     }
1710
1711     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1712
1713     if (my $action = $rule->{action}) {
1714         $action = $actions->{$action} if defined($actions->{$action});
1715         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1716         push @cmd, $goto ? "-g $action" : "-j $action";
1717     }
1718
1719     return scalar(@cmd) ? join(' ', @cmd) : undef;
1720 }
1721
1722 sub ruleset_generate_rule {
1723     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1724
1725     my $rules;
1726
1727     if ($rule->{macro}) {
1728         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1729     } else {
1730         $rules = [ $rule ];
1731     }
1732
1733     # update all or nothing
1734
1735     my @cmds = ();
1736     foreach my $tmp (@$rules) {
1737         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1738             push @cmds, $cmdstr;
1739         }
1740     }
1741
1742     foreach my $cmdstr (@cmds) {
1743         ruleset_addrule($ruleset, $chain, $cmdstr);
1744     }
1745 }
1746
1747 sub ruleset_generate_rule_insert {
1748     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1749
1750     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1751
1752     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1753         ruleset_insertrule($ruleset, $chain, $cmdstr);
1754     }
1755 }
1756
1757 sub ruleset_create_chain {
1758     my ($ruleset, $chain) = @_;
1759
1760     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1761     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1762
1763     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1764
1765     $ruleset->{$chain} = [];
1766 }
1767
1768 sub ruleset_chain_exist {
1769     my ($ruleset, $chain) = @_;
1770
1771     return $ruleset->{$chain} ? 1 : undef;
1772 }
1773
1774 sub ruleset_addrule {
1775    my ($ruleset, $chain, $rule) = @_;
1776
1777    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1778
1779    push @{$ruleset->{$chain}}, "-A $chain $rule";
1780 }
1781
1782 sub ruleset_insertrule {
1783    my ($ruleset, $chain, $rule) = @_;
1784
1785    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1786
1787    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1788 }
1789
1790 sub get_log_rule_base {
1791     my ($chain, $vmid, $msg, $loglevel) = @_;
1792
1793     die "internal error - no log level" if !defined($loglevel);
1794
1795     $vmid = 0 if !defined($vmid);
1796
1797     # Note: we use special format for prefix to pass further
1798     # info to log daemon (VMID, LOGVELEL and CHAIN)
1799
1800     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1801 }
1802
1803 sub ruleset_addlog {
1804     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1805
1806     return if !defined($loglevel);
1807
1808     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1809
1810     $logrule = "$rule $logrule" if defined($rule);
1811
1812     ruleset_addrule($ruleset, $chain, $logrule);
1813 }
1814
1815 sub ruleset_add_chain_policy {
1816     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1817
1818     if ($policy eq 'ACCEPT') {
1819
1820         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1821                               { ACCEPT =>  $accept_action});
1822
1823     } elsif ($policy eq 'DROP') {
1824
1825         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1826
1827         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1828
1829         ruleset_addrule($ruleset, $chain, "-j DROP");
1830     } elsif ($policy eq 'REJECT') {
1831         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1832
1833         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1834
1835         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1836     } else {
1837         # should not happen
1838         die "internal error: unknown policy '$policy'";
1839     }
1840 }
1841
1842 sub ruleset_chain_add_conn_filters {
1843     my ($ruleset, $chain, $accept) = @_;
1844
1845     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1846     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1847 }
1848
1849 sub ruleset_chain_add_input_filters {
1850     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1851
1852     if ($cluster_conf->{ipset}->{blacklist}){
1853         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1854             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1855             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1856             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1857         }
1858         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1859         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1860     }
1861
1862     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1863         if ($ipversion == 4) {
1864             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1865         }
1866     }
1867
1868     if ($options->{tcpflags}) {
1869         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1870     }
1871 }
1872
1873 sub ruleset_create_vm_chain {
1874     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1875
1876     ruleset_create_chain($ruleset, $chain);
1877     my $accept = generate_nfqueue($options);
1878
1879     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1880         if ($direction eq 'OUT') {
1881             ruleset_generate_rule($ruleset, $chain, $ipversion,
1882                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1883                                     proto => 'udp', sport => 68, dport => 67 });
1884         } else {
1885             ruleset_generate_rule($ruleset, $chain, $ipversion,
1886                                   { action => 'ACCEPT',
1887                                     proto => 'udp', sport => 67, dport => 68 });
1888         }
1889     }
1890
1891     if ($direction eq 'OUT') {
1892         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1893             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1894         }
1895         if ($ipfilter_ipset) {
1896             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1897         }
1898         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1899     }
1900 }
1901
1902 sub ruleset_add_group_rule {
1903     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1904
1905     my $group = $rule->{action};
1906     my $group_chain = "GROUP-$group-$direction";
1907     if(!ruleset_chain_exist($ruleset, $group_chain)){
1908         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1909     }
1910
1911     if ($direction eq 'OUT' && $rule->{iface_out}) {
1912         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1913     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1914         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1915     } else {
1916         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1917     }
1918
1919     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1920 }
1921
1922 sub ruleset_generate_vm_rules {
1923     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1924
1925     my $lc_direction = lc($direction);
1926
1927     my $in_accept = generate_nfqueue($options);
1928
1929     foreach my $rule (@$rules) {
1930         next if $rule->{iface} && $rule->{iface} ne $netid;
1931         next if !$rule->{enable} || $rule->{errors};
1932         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1933
1934         if ($rule->{type} eq 'group') {
1935             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1936                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1937         } else {
1938             next if $rule->{type} ne $lc_direction;
1939             eval {
1940                 if ($direction eq 'OUT') {
1941                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1942                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1943                                           undef, $cluster_conf, $vmfw_conf);
1944                 } else {
1945                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1946                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1947                                           undef, $cluster_conf, $vmfw_conf);
1948                 }
1949             };
1950             warn $@ if $@;
1951         }
1952     }
1953 }
1954
1955 sub generate_nfqueue {
1956     my ($options) = @_;
1957
1958     if ($options->{ips}) {
1959         my $action = "NFQUEUE";
1960         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1961             if (defined($3) && defined($1)) {
1962                 $action .= " --queue-balance $1:$3";
1963             } elsif (defined($1)) {
1964                 $action .= " --queue-num $1";
1965             }
1966         }
1967         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1968         return $action;
1969     } else {
1970         return "ACCEPT";
1971     }
1972 }
1973
1974 sub ruleset_generate_vm_ipsrules {
1975     my ($ruleset, $options, $direction, $iface) = @_;
1976
1977     if ($options->{ips} && $direction eq 'IN') {
1978         my $nfqueue = generate_nfqueue($options);
1979
1980         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1981             ruleset_create_chain($ruleset, "PVEFW-IPS");
1982         }
1983
1984         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1985     }
1986 }
1987
1988 sub generate_venet_rules_direction {
1989     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1990
1991     my $lc_direction = lc($direction);
1992
1993     my $rules = $vmfw_conf->{rules};
1994
1995     my $options = $vmfw_conf->{options};
1996     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1997
1998     my $chain = "venet0-$vmid-$direction";
1999
2000     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2001
2002     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2003
2004     # implement policy
2005     my $policy;
2006
2007     if ($direction eq 'OUT') {
2008         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2009     } else {
2010         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2011     }
2012
2013     my $accept = generate_nfqueue($options);
2014     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2015     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2016
2017     if ($direction eq 'OUT') {
2018         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2019             action => $chain,
2020             source => $ip,
2021             iface_in => 'venet0'});
2022     } else {
2023         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2024             action => $chain,
2025             dest => $ip,
2026             iface_out => 'venet0'});
2027     }
2028 }
2029
2030 sub generate_tap_rules_direction {
2031     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2032
2033     my $lc_direction = lc($direction);
2034
2035     my $rules = $vmfw_conf->{rules};
2036
2037     my $options = $vmfw_conf->{options};
2038     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2039
2040     my $tapchain = "$iface-$direction";
2041
2042     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2043     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2044         if $vmfw_conf->{ipset}->{$ipfilter_name};
2045
2046     # create chain with mac and ip filter
2047     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2048
2049     if ($options->{enable}) {
2050         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2051
2052         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2053
2054         # implement policy
2055         my $policy;
2056
2057         if ($direction eq 'OUT') {
2058             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2059         } else {
2060         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2061         }
2062
2063         my $accept = generate_nfqueue($options);
2064         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2065         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2066     } else {
2067         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2068         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2069     }
2070
2071     # plug the tap chain to bridge chain
2072     if ($direction eq 'IN') {
2073         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2074                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2075     } else {
2076         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2077                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2078     }
2079 }
2080
2081 sub enable_host_firewall {
2082     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2083
2084     my $options = $hostfw_conf->{options};
2085     my $cluster_options = $cluster_conf->{options};
2086     my $rules = $hostfw_conf->{rules};
2087     my $cluster_rules = $cluster_conf->{rules};
2088
2089     # host inbound firewall
2090     my $chain = "PVEFW-HOST-IN";
2091     ruleset_create_chain($ruleset, $chain);
2092
2093     my $loglevel = get_option_log_level($options, "log_level_in");
2094
2095     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2096
2097     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2098     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2099
2100     # we use RETURN because we need to check also tap rules
2101     my $accept_action = 'RETURN';
2102
2103     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2104
2105     # add host rules first, so that cluster wide rules can be overwritten
2106     foreach my $rule (@$rules, @$cluster_rules) {
2107         next if !$rule->{enable} || $rule->{errors};
2108         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2109
2110         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2111
2112         eval {
2113             if ($rule->{type} eq 'group') {
2114                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2115             } elsif ($rule->{type} eq 'in') {
2116                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2117                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2118                                       undef, $cluster_conf, $hostfw_conf);
2119             }
2120         };
2121         warn $@ if $@;
2122         delete $rule->{iface_in};
2123     }
2124
2125     # allow standard traffic for management ipset (includes cluster network)
2126     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2127     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2128     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2129     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2130     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2131     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2132
2133     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2134     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2135
2136     # corosync
2137     if ($localnet && ($ipversion == $localnet_ver)) {
2138         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2139         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2140         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2141     }
2142
2143     # implement input policy
2144     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2145     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2146
2147     # host outbound firewall
2148     $chain = "PVEFW-HOST-OUT";
2149     ruleset_create_chain($ruleset, $chain);
2150
2151     $loglevel = get_option_log_level($options, "log_level_out");
2152
2153     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2154
2155     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2156
2157     # we use RETURN because we may want to check other thigs later
2158     $accept_action = 'RETURN';
2159
2160     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2161
2162     # add host rules first, so that cluster wide rules can be overwritten
2163     foreach my $rule (@$rules, @$cluster_rules) {
2164         next if !$rule->{enable} || $rule->{errors};
2165         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2166
2167         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2168         eval {
2169             if ($rule->{type} eq 'group') {
2170                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2171             } elsif ($rule->{type} eq 'out') {
2172                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2173                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2174                                       undef, $cluster_conf, $hostfw_conf);
2175             }
2176         };
2177         warn $@ if $@;
2178         delete $rule->{iface_out};
2179     }
2180
2181     # allow standard traffic on cluster network
2182     if ($localnet && ($ipversion == $localnet_ver)) {
2183         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2184         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2185         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2186         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2187
2188         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2189         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2190         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2191     }
2192
2193     # implement output policy
2194     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2195     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2196
2197     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2198     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2199 }
2200
2201 sub generate_group_rules {
2202     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2203
2204     my $rules = $cluster_conf->{groups}->{$group};
2205
2206     if (!$rules) {
2207         warn "no such security group '$group'\n";
2208         $rules = []; # create empty chain
2209     }
2210
2211     my $chain = "GROUP-${group}-IN";
2212
2213     ruleset_create_chain($ruleset, $chain);
2214     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2215
2216     foreach my $rule (@$rules) {
2217         next if $rule->{type} ne 'in';
2218         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2219         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2220                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2221                               undef, $cluster_conf);
2222     }
2223
2224     $chain = "GROUP-${group}-OUT";
2225
2226     ruleset_create_chain($ruleset, $chain);
2227     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2228
2229     foreach my $rule (@$rules) {
2230         next if $rule->{type} ne 'out';
2231         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2232         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2233         # check also other tap rules later
2234         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2235                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2236                               undef, $cluster_conf);
2237     }
2238 }
2239
2240 my $MAX_NETS = 32;
2241 my $valid_netdev_names = {};
2242 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2243     $valid_netdev_names->{"net$i"} = 1;
2244 }
2245
2246 sub parse_fw_rule {
2247     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2248
2249     my $orig_line = $line;
2250
2251     my $rule = {};
2252
2253     # we can add single line comments to the end of the rule
2254     if ($line =~ s/#\s*(.*?)\s*$//) {
2255         $rule->{comment} = decode('utf8', $1);
2256     }
2257
2258     # we can disable a rule when prefixed with '|'
2259
2260     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2261
2262     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2263         die "unable to parse rule: $line\n";
2264
2265     $rule->{type} = lc($1);
2266     $rule->{action} = $2;
2267
2268     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2269         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2270             $rule->{macro} = $1;
2271             $rule->{action} = $2;
2272         }
2273     }
2274
2275     while (length($line)) {
2276         if ($line =~ s/^-i (\S+)\s*//) {
2277             $rule->{iface} = $1;
2278             next;
2279         }
2280
2281         last if $rule->{type} eq 'group';
2282
2283         if ($line =~ s/^-p (\S+)\s*//) {
2284             $rule->{proto} = $1;
2285             next;
2286         }
2287
2288         if ($line =~ s/^-dport (\S+)\s*//) {
2289             $rule->{dport} = $1;
2290             next;
2291         }
2292
2293         if ($line =~ s/^-sport (\S+)\s*//) {
2294             $rule->{sport} = $1;
2295             next;
2296         }
2297         if ($line =~ s/^-source (\S+)\s*//) {
2298             $rule->{source} = $1;
2299             next;
2300         }
2301         if ($line =~ s/^-dest (\S+)\s*//) {
2302             $rule->{dest} = $1;
2303             next;
2304         }
2305
2306         last;
2307     }
2308
2309     die "unable to parse rule parameters: $line\n" if length($line);
2310
2311     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2312     if ($verbose && $rule->{errors}) {
2313         warn "$prefix - errors in rule parameters: $orig_line\n";
2314         foreach my $p (keys %{$rule->{errors}}) {
2315             warn "  $p: $rule->{errors}->{$p}\n";
2316         }
2317     }
2318
2319     return $rule;
2320 }
2321
2322 sub parse_vmfw_option {
2323     my ($line) = @_;
2324
2325     my ($opt, $value);
2326
2327     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2328
2329     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2330         $opt = lc($1);
2331         $value = int($2);
2332     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2333         $opt = lc($1);
2334         $value = $2 ? lc($3) : '';
2335     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2336         $opt = lc($1);
2337         $value = uc($3);
2338     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2339         $opt = lc($1);
2340         $value = $2;
2341     } else {
2342         die "can't parse option '$line'\n"
2343     }
2344
2345     return ($opt, $value);
2346 }
2347
2348 sub parse_hostfw_option {
2349     my ($line) = @_;
2350
2351     my ($opt, $value);
2352
2353     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2354
2355     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2356         $opt = lc($1);
2357         $value = int($2);
2358     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2359         $opt = lc($1);
2360         $value = $2 ? lc($3) : '';
2361     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2362         $opt = lc($1);
2363         $value = int($2);
2364     } else {
2365         die "can't parse option '$line'\n"
2366     }
2367
2368     return ($opt, $value);
2369 }
2370
2371 sub parse_clusterfw_option {
2372     my ($line) = @_;
2373
2374     my ($opt, $value);
2375
2376     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2377         $opt = lc($1);
2378         $value = int($2);
2379     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2380         $opt = lc($1);
2381         $value = uc($3);
2382     } else {
2383         die "can't parse option '$line'\n"
2384     }
2385
2386     return ($opt, $value);
2387 }
2388
2389 sub resolve_alias {
2390     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2391
2392     my $alias = lc($cidr);
2393     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2394     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2395
2396     die "no such alias '$cidr'\n" if !$e;;
2397
2398     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2399 }
2400
2401 sub parse_ip_or_cidr {
2402     my ($cidr) = @_;
2403
2404     my $ipversion;
2405
2406     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2407         $cidr =~ s|/128$||;
2408         $ipversion = 6;
2409     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2410         $cidr =~ s|/32$||;
2411         $ipversion = 4;
2412     } else {
2413         die "value does not look like a valid IP address or CIDR network\n";
2414     }
2415
2416     return wantarray ? ($cidr, $ipversion) : $cidr;
2417 }
2418
2419 sub parse_alias {
2420     my ($line) = @_;
2421
2422     # we can add single line comments to the end of the line
2423     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2424
2425     if ($line =~ m/^(\S+)\s(\S+)$/) {
2426         my ($name, $cidr) = ($1, $2);
2427         my $ipversion;
2428
2429         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2430
2431         my $data = {
2432             name => $name,
2433             cidr => $cidr,
2434             ipversion => $ipversion,
2435         };
2436         $data->{comment} = $comment  if $comment;
2437         return $data;
2438     }
2439
2440     return undef;
2441 }
2442
2443 sub generic_fw_config_parser {
2444     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2445
2446     my $section;
2447     my $group;
2448
2449     my $res = $empty_conf;
2450
2451     while (defined(my $line = <$fh>)) {
2452         next if $line =~ m/^#/;
2453         next if $line =~ m/^\s*$/;
2454
2455         chomp $line;
2456
2457         my $linenr = $fh->input_line_number();
2458         my $prefix = "$filename (line $linenr)";
2459
2460         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2461             $section = 'options';
2462             next;
2463         }
2464
2465         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2466             $section = 'aliases';
2467             next;
2468         }
2469
2470         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2471             $section = 'groups';
2472             $group = lc($1);
2473             my $comment = $2;
2474             eval {
2475                 die "security group name too long\n" if length($group) > $max_group_name_length;
2476                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2477             };
2478             if (my $err = $@) {
2479                 ($section, $group, $comment) = undef;
2480                 warn "$prefix: $err";
2481                 next;
2482             }
2483
2484             $res->{$section}->{$group} = [];
2485             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2486                 if $comment;
2487             next;
2488         }
2489
2490         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2491             $section = 'rules';
2492             next;
2493         }
2494
2495         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2496             $section = 'ipset';
2497             $group = lc($1);
2498             my $comment = $2;
2499             eval {
2500                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2501                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2502             };
2503             if (my $err = $@) {
2504                 ($section, $group, $comment) = undef;
2505                 warn "$prefix: $err";
2506                 next;
2507             }
2508
2509             $res->{$section}->{$group} = [];
2510             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2511                 if $comment;
2512             next;
2513         }
2514
2515         if (!$section) {
2516             warn "$prefix: skip line - no section\n";
2517             next;
2518         }
2519
2520         if ($section eq 'options') {
2521             eval {
2522                 my ($opt, $value);
2523                 if ($rule_env eq 'cluster') {
2524                     ($opt, $value) = parse_clusterfw_option($line);
2525                 } elsif ($rule_env eq 'host') {
2526                     ($opt, $value) = parse_hostfw_option($line);
2527                 } else {
2528                     ($opt, $value) = parse_vmfw_option($line);
2529                 }
2530                 $res->{options}->{$opt} = $value;
2531             };
2532             warn "$prefix: $@" if $@;
2533         } elsif ($section eq 'aliases') {
2534             eval {
2535                 my $data = parse_alias($line);
2536                 $res->{aliases}->{lc($data->{name})} = $data;
2537             };
2538             warn "$prefix: $@" if $@;
2539         } elsif ($section eq 'rules') {
2540             my $rule;
2541             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2542             if (my $err = $@) {
2543                 warn "$prefix: $err";
2544                 next;
2545             }
2546             push @{$res->{$section}}, $rule;
2547         } elsif ($section eq 'groups') {
2548             my $rule;
2549             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2550             if (my $err = $@) {
2551                 warn "$prefix: $err";
2552                 next;
2553             }
2554             push @{$res->{$section}->{$group}}, $rule;
2555         } elsif ($section eq 'ipset') {
2556             # we can add single line comments to the end of the rule
2557             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2558
2559             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2560             my $nomatch = $1;
2561             my $cidr = $2;
2562             my $errors;
2563
2564             if ($nomatch && !$feature_ipset_nomatch) {
2565                 $errors->{nomatch} = "nomatch not supported by kernel";
2566             }
2567
2568             eval {
2569                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2570                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2571                 } else {
2572                     $cidr = parse_ip_or_cidr($cidr);
2573                 }
2574             };
2575             if (my $err = $@) {
2576                 chomp $err;
2577                 $errors->{cidr} = $err;
2578             }
2579
2580             my $entry = { cidr => $cidr };
2581             $entry->{nomatch} = 1 if $nomatch;
2582             $entry->{comment} = $comment if $comment;
2583             $entry->{errors} =  $errors if $errors;
2584
2585             if ($verbose && $errors) {
2586                 warn "$prefix - errors in ipset '$group': $line\n";
2587                 foreach my $p (keys %{$errors}) {
2588                     warn "  $p: $errors->{$p}\n";
2589                 }
2590             }
2591
2592             push @{$res->{$section}->{$group}}, $entry;
2593         } else {
2594             warn "$prefix: skip line - unknown section\n";
2595             next;
2596         }
2597     }
2598
2599     return $res;
2600 }
2601
2602 sub parse_hostfw_config {
2603     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2604
2605     my $empty_conf = { rules => [], options => {}};
2606
2607     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2608 }
2609
2610 sub parse_vmfw_config {
2611     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2612
2613     my $empty_conf = {
2614         rules => [],
2615         options => {},
2616         aliases => {},
2617         ipset => {} ,
2618         ipset_comments => {},
2619     };
2620
2621     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2622 }
2623
2624 sub parse_clusterfw_config {
2625     my ($filename, $fh, $verbose) = @_;
2626
2627     my $section;
2628     my $group;
2629
2630     my $empty_conf = {
2631         rules => [],
2632         options => {},
2633         aliases => {},
2634         groups => {},
2635         group_comments => {},
2636         ipset => {} ,
2637         ipset_comments => {},
2638     };
2639
2640     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2641 }
2642
2643 sub run_locked {
2644     my ($code, @param) = @_;
2645
2646     my $timeout = 10;
2647
2648     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2649
2650     die $@ if $@;
2651
2652     return $res;
2653 }
2654
2655 sub read_local_vm_config {
2656
2657     my $openvz = {};
2658     my $qemu = {};
2659
2660     my $vmdata = { openvz => $openvz, qemu => $qemu };
2661
2662     my $vmlist = PVE::Cluster::get_vmlist();
2663     return $vmdata if !$vmlist || !$vmlist->{ids};
2664     my $ids = $vmlist->{ids};
2665
2666     foreach my $vmid (keys %$ids) {
2667         next if !$vmid; # skip VE0
2668         my $d = $ids->{$vmid};
2669         next if !$d->{node} || $d->{node} ne $nodename;
2670         next if !$d->{type};
2671         if ($d->{type} eq 'openvz') {
2672             if ($have_pve_manager) {
2673                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2674                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2675                     $openvz->{$vmid} = $conf;
2676                 }
2677             }
2678         } elsif ($d->{type} eq 'qemu') {
2679             if ($have_qemu_server) {
2680                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2681                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2682                     $qemu->{$vmid} = $conf;
2683                 }
2684             }
2685         }
2686     }
2687
2688     return $vmdata;
2689 };
2690
2691 sub load_vmfw_conf {
2692     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2693
2694     my $vmfw_conf = {};
2695
2696     $dir = $pvefw_conf_dir if !defined($dir);
2697
2698     my $filename = "$dir/$vmid.fw";
2699     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2700         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2701         $vmfw_conf->{vmid} = $vmid;
2702     }
2703
2704     return $vmfw_conf;
2705 }
2706
2707 my $format_rules = sub {
2708     my ($rules, $allow_iface) = @_;
2709
2710     my $raw = '';
2711
2712     foreach my $rule (@$rules) {
2713         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2714             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2715             $raw .= uc($rule->{type});
2716             if ($rule->{macro}) {
2717                 $raw .= " $rule->{macro}($rule->{action})";
2718             } else {
2719                 $raw .= " " . $rule->{action};
2720             }
2721             if ($allow_iface && $rule->{iface}) {
2722                 $raw .= " -i $rule->{iface}";
2723             }
2724
2725             if ($rule->{type} ne  'group')  {
2726                 $raw .= " -source $rule->{source}" if $rule->{source};
2727                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2728                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2729                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2730                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2731             }
2732
2733             $raw .= " # " . encode('utf8', $rule->{comment})
2734                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2735             $raw .= "\n";
2736         } else {
2737             die "unknown rule type '$rule->{type}'";
2738         }
2739     }
2740
2741     return $raw;
2742 };
2743
2744 my $format_options = sub {
2745     my ($options) = @_;
2746
2747     my $raw = '';
2748
2749     $raw .= "[OPTIONS]\n\n";
2750     foreach my $opt (keys %$options) {
2751         $raw .= "$opt: $options->{$opt}\n";
2752     }
2753     $raw .= "\n";
2754
2755     return $raw;
2756 };
2757
2758 my $format_aliases = sub {
2759     my ($aliases) = @_;
2760
2761     my $raw = '';
2762
2763     $raw .= "[ALIASES]\n\n";
2764     foreach my $k (keys %$aliases) {
2765         my $e = $aliases->{$k};
2766         $raw .= "$e->{name} $e->{cidr}";
2767         $raw .= " # " . encode('utf8', $e->{comment})
2768             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2769         $raw .= "\n";
2770     }
2771     $raw .= "\n";
2772
2773     return $raw;
2774 };
2775
2776 my $format_ipsets = sub {
2777     my ($fw_conf) = @_;
2778
2779     my $raw = '';
2780
2781     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2782         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2783             my $utf8comment = encode('utf8', $comment);
2784             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2785         } else {
2786             $raw .= "[IPSET $ipset]\n\n";
2787         }
2788         my $options = $fw_conf->{ipset}->{$ipset};
2789
2790         my $nethash = {};
2791         foreach my $entry (@$options) {
2792             $nethash->{$entry->{cidr}} = $entry;
2793         }
2794
2795         foreach my $cidr (sort keys %$nethash) {
2796             my $entry = $nethash->{$cidr};
2797             my $line = $entry->{nomatch} ? '!' : '';
2798             $line .= $entry->{cidr};
2799             $line .= " # " . encode('utf8', $entry->{comment})
2800                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2801             $raw .= "$line\n";
2802         }
2803
2804         $raw .= "\n";
2805     }
2806
2807     return $raw;
2808 };
2809
2810 sub save_vmfw_conf {
2811     my ($vmid, $vmfw_conf) = @_;
2812
2813     my $raw = '';
2814
2815     my $options = $vmfw_conf->{options};
2816     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2817
2818     my $aliases = $vmfw_conf->{aliases};
2819     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2820
2821     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2822
2823     my $rules = $vmfw_conf->{rules} || [];
2824     if ($rules && scalar(@$rules)) {
2825         $raw .= "[RULES]\n\n";
2826         $raw .= &$format_rules($rules, 1);
2827         $raw .= "\n";
2828     }
2829
2830     mkdir $pvefw_conf_dir;
2831
2832     my $filename = "$pvefw_conf_dir/$vmid.fw";
2833     PVE::Tools::file_set_contents($filename, $raw);
2834 }
2835
2836 sub read_vm_firewall_configs {
2837     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2838
2839     my $vmfw_configs = {};
2840
2841     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2842         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2843         next if !$vmfw_conf->{options}; # skip if file does not exists
2844         $vmfw_configs->{$vmid} = $vmfw_conf;
2845     }
2846     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2847         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2848         next if !$vmfw_conf->{options}; # skip if file does not exists
2849         $vmfw_configs->{$vmid} = $vmfw_conf;
2850     }
2851
2852     return $vmfw_configs;
2853 }
2854
2855 sub get_option_log_level {
2856     my ($options, $k) = @_;
2857
2858     my $v = $options->{$k};
2859     $v = $default_log_level if !defined($v);
2860
2861     return undef if $v eq '' || $v eq 'nolog';
2862
2863     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2864
2865     return $v if ($v >= 0) && ($v <= 7);
2866
2867     warn "unknown log level ($k = '$v')\n";
2868
2869     return undef;
2870 }
2871
2872 sub generate_std_chains {
2873     my ($ruleset, $options, $ipversion) = @_;
2874
2875     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2876
2877     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2878
2879     my $chain;
2880
2881     if ($ipversion == 4) {
2882         # same as shorewall smurflog.
2883         $chain = 'PVEFW-smurflog';
2884         $std_chains->{$chain} = [];
2885
2886         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2887         push @{$std_chains->{$chain}}, "-j DROP";
2888     }
2889
2890     # same as shorewall logflags action.
2891     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2892     $chain = 'PVEFW-logflags';
2893     $std_chains->{$chain} = [];
2894
2895     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2896     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2897     push @{$std_chains->{$chain}}, "-j DROP";
2898
2899     foreach my $chain (keys %$std_chains) {
2900         ruleset_create_chain($ruleset, $chain);
2901         foreach my $rule (@{$std_chains->{$chain}}) {
2902             if (ref($rule)) {
2903                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2904             } else {
2905                 ruleset_addrule($ruleset, $chain, $rule);
2906             }
2907         }
2908     }
2909 }
2910
2911 sub generate_ipset_chains {
2912     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2913
2914     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2915
2916         my $options = $fw_conf->{ipset}->{$ipset};
2917
2918         # remove duplicates
2919         my $nethash = {};
2920         foreach my $entry (@$options) {
2921             next if $entry->{errors}; # skip entries with errors
2922             eval {
2923                 my ($cidr, $ver);
2924                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2925                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2926                 } else {
2927                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2928                 }
2929                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2930                 if ($ver == 6) {
2931                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2932                     $cidr = inet_ntop(AF_INET6, $ipv6);
2933                     $cidr =~ s|/128$||;
2934                 } else {
2935                     $cidr =~ s|/32$||;
2936                 }
2937
2938                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2939             };
2940             warn $@ if $@;
2941         }
2942
2943         foreach my $ipversion (4, 6) {
2944             my $data = $nethash->{$ipversion};
2945
2946             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2947
2948             my $hashsize = scalar(@$options);
2949             if ($hashsize <= 64) {
2950                 $hashsize = 64;
2951             } else {
2952                 $hashsize = round_powerof2($hashsize);
2953             }
2954
2955             my $family = $ipversion == "6" ? "inet6" : "inet";
2956
2957             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2958
2959             foreach my $cidr (sort keys %$data) {
2960                 my $entry = $data->{$cidr};
2961
2962                 my $cmd = "add $name $cidr";
2963                 if ($entry->{nomatch}) {
2964                     if ($feature_ipset_nomatch) {
2965                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2966                     } else {
2967                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2968                     }
2969                 } else {
2970                     push @{$ipset_ruleset->{$name}}, $cmd;
2971                 }
2972             }
2973         }
2974     }
2975 }
2976
2977 sub round_powerof2 {
2978     my ($int) = @_;
2979
2980     $int--;
2981     $int |= $int >> $_ foreach (1,2,4,8,16);
2982     return ++$int;
2983 }
2984
2985 sub load_clusterfw_conf {
2986     my ($filename, $verbose) = @_;
2987
2988     $filename = $clusterfw_conf_filename if !defined($filename);
2989
2990     my $cluster_conf = {};
2991     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2992         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2993     }
2994
2995     return $cluster_conf;
2996 }
2997
2998 sub save_clusterfw_conf {
2999     my ($cluster_conf) = @_;
3000
3001     my $raw = '';
3002
3003     my $options = $cluster_conf->{options};
3004     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3005
3006     my $aliases = $cluster_conf->{aliases};
3007     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3008
3009     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3010
3011     my $rules = $cluster_conf->{rules};
3012     if ($rules && scalar(@$rules)) {
3013         $raw .= "[RULES]\n\n";
3014         $raw .= &$format_rules($rules, 1);
3015         $raw .= "\n";
3016     }
3017
3018     if ($cluster_conf->{groups}) {
3019         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3020             my $rules = $cluster_conf->{groups}->{$group};
3021             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3022                 my $utf8comment = encode('utf8', $comment);
3023                 $raw .= "[group $group] # $utf8comment\n\n";
3024             } else {
3025                 $raw .= "[group $group]\n\n";
3026             }
3027
3028             $raw .= &$format_rules($rules, 0);
3029             $raw .= "\n";
3030         }
3031     }
3032
3033     mkdir $pvefw_conf_dir;
3034     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3035 }
3036
3037 sub load_hostfw_conf {
3038     my ($cluster_conf, $filename, $verbose) = @_;
3039
3040     $filename = $hostfw_conf_filename if !defined($filename);
3041
3042     my $hostfw_conf = {};
3043     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3044         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3045     }
3046     return $hostfw_conf;
3047 }
3048
3049 sub save_hostfw_conf {
3050     my ($hostfw_conf) = @_;
3051
3052     my $raw = '';
3053
3054     my $options = $hostfw_conf->{options};
3055     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3056
3057     my $rules = $hostfw_conf->{rules};
3058     if ($rules && scalar(@$rules)) {
3059         $raw .= "[RULES]\n\n";
3060         $raw .= &$format_rules($rules, 1);
3061         $raw .= "\n";
3062     }
3063
3064     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3065 }
3066
3067 sub compile {
3068     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3069
3070     my $vmfw_configs;
3071
3072     if ($vmdata) { # test mode
3073         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3074         my $filename = "$testdir/cluster.fw";
3075         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3076
3077         $filename = "$testdir/host.fw";
3078         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3079
3080         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3081     } else { # normal operation
3082         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3083
3084         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3085
3086         $vmdata = read_local_vm_config();
3087         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3088     }
3089
3090     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3091     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3092
3093     return ($ruleset, $ipset_ruleset, $rulesetv6);
3094 }
3095
3096 sub compile_iptables_filter {
3097     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3098
3099     $cluster_conf->{ipset}->{venet0} = [];
3100     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3101
3102     my $localnet;
3103     if ($cluster_conf->{aliases}->{local_network}) {
3104         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3105     } else {
3106         my $localnet_ver;
3107         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3108
3109         $cluster_conf->{aliases}->{local_network} = {
3110             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3111     }
3112
3113     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3114
3115     return ({}, {}) if !$cluster_conf->{options}->{enable};
3116
3117     my $ruleset = {};
3118
3119     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3120     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3121
3122     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3123
3124     my $hostfw_options = $hostfw_conf->{options} || {};
3125
3126     # fixme: what log level should we use here?
3127     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3128
3129     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3130
3131
3132     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3133     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3134     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3135
3136     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3137     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3138
3139     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3140
3141     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3142     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3143
3144     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3145     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3146
3147     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3148
3149     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3150
3151     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3152
3153     my $ipset_ruleset = {};
3154
3155     if ($hostfw_enable) {
3156         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3157         warn $@ if $@; # just to be sure - should not happen
3158     }
3159
3160     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3161
3162     # generate firewall rules for QEMU VMs
3163     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3164         eval {
3165             my $conf = $vmdata->{qemu}->{$vmid};
3166             my $vmfw_conf = $vmfw_configs->{$vmid};
3167             return if !$vmfw_conf;
3168
3169             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3170
3171             foreach my $netid (keys %$conf) {
3172                 next if $netid !~ m/^net(\d+)$/;
3173                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3174                 next if !$net->{firewall};
3175                 my $iface = "tap${vmid}i$1";
3176
3177                 my $macaddr = $net->{macaddr};
3178                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3179                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3180                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3181                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3182             }
3183         };
3184         warn $@ if $@; # just to be sure - should not happen
3185     }
3186
3187     # generate firewall rules for OpenVZ containers
3188     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3189         eval {
3190             my $conf = $vmdata->{openvz}->{$vmid};
3191
3192             my $vmfw_conf = $vmfw_configs->{$vmid};
3193             return if !$vmfw_conf;
3194
3195             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3196
3197             if ($vmfw_conf->{options}->{enable}) {
3198                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3199                     my $ip = $conf->{ip_address}->{value};
3200                     $ip =~ s/\s+/,/g;
3201
3202                     my @ips = ();
3203
3204                     foreach my $singleip (split(',', $ip)) {
3205                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3206                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3207                         push @ips, $singleip if $singleip_ver == $ipversion;
3208                     }
3209
3210                     if (scalar(@ips)) {
3211                         my $ip_list = join(',', @ips);
3212                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3213                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3214                     }
3215                 }
3216             }
3217
3218             if ($conf->{netif} && $conf->{netif}->{value}) {
3219                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3220                 foreach my $netid (keys %$netif) {
3221                     my $d = $netif->{$netid};
3222                     my $bridge = $d->{bridge};
3223                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3224                     my $macaddr = $d->{mac};
3225                     my $iface = $d->{host_ifname};
3226                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3227                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3228                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3229                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3230                 }
3231             }
3232         };
3233         warn $@ if $@; # just to be sure - should not happen
3234     }
3235
3236     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3237         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3238     }
3239
3240     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3241
3242     return ($ruleset, $ipset_ruleset);
3243 }
3244
3245 sub get_ruleset_status {
3246     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3247
3248     my $statushash = {};
3249
3250     foreach my $chain (sort keys %$ruleset) {
3251         my $sig = &$digest_fn($ruleset->{$chain});
3252
3253         $statushash->{$chain}->{sig} = $sig;
3254
3255         my $oldsig = $active_chains->{$chain};
3256         if (!defined($oldsig)) {
3257             $statushash->{$chain}->{action} = 'create';
3258         } else {
3259             if ($oldsig eq $sig) {
3260                 $statushash->{$chain}->{action} = 'exists';
3261             } else {
3262                 $statushash->{$chain}->{action} = 'update';
3263             }
3264         }
3265         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3266         foreach my $cmd (@{$ruleset->{$chain}}) {
3267             print "\t$cmd\n" if $verbose;
3268         }
3269     }
3270
3271     foreach my $chain (sort keys %$active_chains) {
3272         if (!defined($ruleset->{$chain})) {
3273             my $sig = $active_chains->{$chain};
3274             $statushash->{$chain}->{action} = 'delete';
3275             $statushash->{$chain}->{sig} = $sig;
3276             print "delete $chain ($sig)\n" if $verbose;
3277         }
3278     }
3279
3280     return $statushash;
3281 }
3282
3283 sub print_sig_rule {
3284     my ($chain, $sig) = @_;
3285
3286     # We just use this to store a SHA1 checksum used to detect changes
3287     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3288 }
3289
3290 sub get_ruleset_cmdlist {
3291     my ($ruleset, $verbose, $iptablescmd) = @_;
3292
3293     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3294
3295     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3296     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3297
3298     # create missing chains first
3299     foreach my $chain (sort keys %$ruleset) {
3300         my $stat = $statushash->{$chain};
3301         die "internal error" if !$stat;
3302         next if $stat->{action} ne 'create';
3303
3304         $cmdlist .= ":$chain - [0:0]\n";
3305     }
3306
3307     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3308         my $chain = "PVEFW-$h";
3309         if ($ruleset->{$chain} && !$hooks->{$h}) {
3310             $cmdlist .= "-A $h -j $chain\n";
3311         }
3312     }
3313
3314     foreach my $chain (sort keys %$ruleset) {
3315         my $stat = $statushash->{$chain};
3316         die "internal error" if !$stat;
3317
3318         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3319             $cmdlist .= "-F $chain\n";
3320             foreach my $cmd (@{$ruleset->{$chain}}) {
3321                 $cmdlist .= "$cmd\n";
3322             }
3323             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3324         } elsif ($stat->{action} eq 'delete') {
3325             die "internal error"; # this should not happen
3326         } elsif ($stat->{action} eq 'exists') {
3327             # do nothing
3328         } else {
3329             die "internal error - unknown status '$stat->{action}'";
3330         }
3331     }
3332
3333     foreach my $chain (keys %$statushash) {
3334         next if $statushash->{$chain}->{action} ne 'delete';
3335         $cmdlist .= "-F $chain\n";
3336     }
3337     foreach my $chain (keys %$statushash) {
3338         next if $statushash->{$chain}->{action} ne 'delete';
3339         next if $chain eq 'PVEFW-INPUT';
3340         next if $chain eq 'PVEFW-OUTPUT';
3341         next if $chain eq 'PVEFW-FORWARD';
3342         $cmdlist .= "-X $chain\n";
3343     }
3344
3345     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3346
3347     $cmdlist .= "COMMIT\n";
3348
3349     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3350 }
3351
3352 sub get_ipset_cmdlist {
3353     my ($ruleset, $verbose) = @_;
3354
3355     my $cmdlist = "";
3356
3357     my $delete_cmdlist = "";
3358
3359     my $active_chains = ipset_get_chains();
3360     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3361
3362     # remove stale _swap chains
3363     foreach my $chain (keys %$active_chains) {
3364         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3365             $cmdlist .= "destroy $chain\n";
3366         }
3367     }
3368
3369     foreach my $chain (keys %$ruleset) {
3370         my $stat = $statushash->{$chain};
3371         die "internal error" if !$stat;
3372
3373         if ($stat->{action} eq 'create') {
3374             foreach my $cmd (@{$ruleset->{$chain}}) {
3375                 $cmdlist .= "$cmd\n";
3376             }
3377         }
3378     }
3379
3380     foreach my $chain (keys %$ruleset) {
3381         my $stat = $statushash->{$chain};
3382         die "internal error" if !$stat;
3383
3384         if ($stat->{action} eq 'update') {
3385             my $chain_swap = $chain."_swap";
3386
3387             foreach my $cmd (@{$ruleset->{$chain}}) {
3388                 $cmd =~ s/$chain/$chain_swap/;
3389                 $cmdlist .= "$cmd\n";
3390             }
3391             $cmdlist .= "swap $chain_swap $chain\n";
3392             $cmdlist .= "flush $chain_swap\n";
3393             $cmdlist .= "destroy $chain_swap\n";
3394         }
3395     }
3396
3397      # the remove unused chains
3398     foreach my $chain (keys %$statushash) {
3399         next if $statushash->{$chain}->{action} ne 'delete';
3400
3401         $delete_cmdlist .= "flush $chain\n";
3402         $delete_cmdlist .= "destroy $chain\n";
3403     }
3404
3405     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3406
3407     return ($cmdlist, $delete_cmdlist, $changes);
3408 }
3409
3410 sub apply_ruleset {
3411     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3412
3413     enable_bridge_firewall();
3414
3415     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3416         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3417
3418     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3419     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3420
3421     if ($verbose) {
3422         if ($ipset_changes) {
3423             print "ipset changes:\n";
3424             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3425             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3426         }
3427
3428         if ($changes) {
3429             print "iptables changes:\n";
3430             print $cmdlist;
3431         }
3432
3433         if ($changesv6) {
3434             print "ip6tables changes:\n";
3435             print $cmdlistv6;
3436         }
3437     }
3438
3439     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3440     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3441
3442     ipset_restore_cmdlist($ipset_create_cmdlist);
3443
3444     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3445     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3446
3447     iptables_restore_cmdlist($cmdlist);
3448
3449     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3450     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3451
3452     ip6tables_restore_cmdlist($cmdlistv6);
3453
3454     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3455     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3456
3457     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3458
3459     # test: re-read status and check if everything is up to date
3460     my $active_chains = iptables_get_chains();
3461     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3462
3463     my $errors;
3464     foreach my $chain (sort keys %$ruleset) {
3465         my $stat = $statushash->{$chain};
3466         if ($stat->{action} ne 'exists') {
3467             warn "unable to update chain '$chain'\n";
3468             $errors = 1;
3469         }
3470     }
3471
3472     my $active_chainsv6 = iptables_get_chains("ip6tables");
3473     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3474
3475     foreach my $chain (sort keys %$rulesetv6) {
3476         my $stat = $statushashv6->{$chain};
3477         if ($stat->{action} ne 'exists') {
3478             warn "unable to update chain '$chain'\n";
3479             $errors = 1;
3480         }
3481     }
3482
3483     die "unable to apply firewall changes\n" if $errors;
3484
3485     update_nf_conntrack_max($hostfw_conf);
3486
3487     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3488
3489 }
3490
3491 sub update_nf_conntrack_max {
3492     my ($hostfw_conf) = @_;
3493
3494     my $max = 65536; # reasonable default
3495
3496     my $options = $hostfw_conf->{options} || {};
3497
3498     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3499         $max = $options->{nf_conntrack_max};
3500         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3501     }
3502
3503     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3504     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3505
3506     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3507
3508     if ($current != $max) {
3509         my $hashsize = int($max/4);
3510         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3511         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3512     }
3513 }
3514
3515 sub update_nf_conntrack_tcp_timeout_established {
3516     my ($hostfw_conf) = @_;
3517
3518     my $options = $hostfw_conf->{options} || {};
3519
3520     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3521
3522     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3523 }
3524
3525 sub remove_pvefw_chains {
3526
3527     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3528     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3529     PVE::Firewall::remove_pvefw_chains_ipset();
3530
3531 }
3532
3533 sub remove_pvefw_chains_iptables {
3534     my ($iptablescmd) = @_;
3535
3536     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3537     my $cmdlist = "*filter\n";
3538
3539     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3540         if ($hooks->{$h}) {
3541             $cmdlist .= "-D $h -j PVEFW-$h\n";
3542         }
3543     }
3544
3545     foreach my $chain (keys %$chash) {
3546         $cmdlist .= "-F $chain\n";
3547     }
3548
3549     foreach my $chain (keys %$chash) {
3550         $cmdlist .= "-X $chain\n";
3551     }
3552     $cmdlist .= "COMMIT\n";
3553
3554     if($iptablescmd eq "ip6tables") {
3555         ip6tables_restore_cmdlist($cmdlist);
3556     } else {
3557         iptables_restore_cmdlist($cmdlist);
3558     }
3559 }
3560
3561 sub remove_pvefw_chains_ipset {
3562
3563     my $ipset_chains = ipset_get_chains();
3564
3565     my $cmdlist = "";
3566
3567     foreach my $chain (keys %$ipset_chains) {
3568         $cmdlist .= "flush $chain\n";
3569         $cmdlist .= "destroy $chain\n";
3570     }
3571
3572     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3573 }
3574
3575 sub init {
3576     my $cluster_conf = load_clusterfw_conf();
3577     my $cluster_options = $cluster_conf->{options};
3578     my $enable = $cluster_options->{enable};
3579
3580     return if !$enable;
3581
3582     # load required modules here
3583 }
3584
3585 sub update {
3586     my $code = sub {
3587
3588         my $cluster_conf = load_clusterfw_conf();
3589         my $cluster_options = $cluster_conf->{options};
3590
3591         if (!$cluster_options->{enable}) {
3592             PVE::Firewall::remove_pvefw_chains();
3593             return;
3594         }
3595
3596         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3597
3598         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3599
3600         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3601     };
3602
3603     run_locked($code);
3604 }
3605
3606 1;