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 my $nodename = PVE::INotify::nodename();
 117
 118 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 119
 120 my $default_log_level = 'nolog'; # avoid logs by default
 121
 122 my $log_level_hash = {
 123     debug => 7,
 124     info => 6,
 125     notice => 5,
 126     warning => 4,
 127     err => 3,
 128     crit => 2,
 129     alert => 1,
 130     emerg => 0,
 131 };
 132
 133 # we need to overwrite some macros for ipv6
 134 my $pve_ipv6fw_macros = {
 135     'Ping' => [
 136         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 137     ],
 138     'Trcrt' => [
 139         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 140         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 141     ],
 142  };
 143
 144 # imported/converted from: /usr/share/shorewall/macro.*
 145 my $pve_fw_macros = {
 146     'Amanda' => [
 147         "Amanda Backup",
 148         { action => 'PARAM', proto => 'udp', dport => '10080' },
 149         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 150     ],
 151     'Auth' => [
 152         "Auth (identd) traffic",
 153         { action => 'PARAM', proto => 'tcp', dport => '113' },
 154     ],
 155     'BGP' => [
 156         "Border Gateway Protocol traffic",
 157         { action => 'PARAM', proto => 'tcp', dport => '179' },
 158     ],
 159     'BitTorrent' => [
 160         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 161         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 162         { action => 'PARAM', proto => 'udp', dport => '6881' },
 163     ],
 164     'BitTorrent32' => [
 165         "BitTorrent traffic for BitTorrent 3.2 and later",
 166         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 167         { action => 'PARAM', proto => 'udp', dport => '6881' },
 168     ],
 169     'Ceph' => [
 170         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 171         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 172         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 173     ],
 174     'CVS' => [
 175         "Concurrent Versions System pserver traffic",
 176         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 177     ],
 178     'Citrix' => [
 179         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 180         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 181         { action => 'PARAM', proto => 'udp', dport => '1604' },
 182         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 183     ],
 184     'DAAP' => [
 185         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 186         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 187         { action => 'PARAM', proto => 'udp', dport => '3689' },
 188     ],
 189     'DCC' => [
 190         "Distributed Checksum Clearinghouse spam filtering mechanism",
 191         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 192     ],
 193     'DHCPfwd' => [
 194         "Forwarded DHCP traffic",
 195         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 196     ],
 197     'DNS' => [
 198         "Domain Name System traffic (upd and tcp)",
 199         { action => 'PARAM', proto => 'udp', dport => '53' },
 200         { action => 'PARAM', proto => 'tcp', dport => '53' },
 201     ],
 202     'Distcc' => [
 203         "Distributed Compiler service",
 204         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 205     ],
 206     'FTP' => [
 207         "File Transfer Protocol",
 208         { action => 'PARAM', proto => 'tcp', dport => '21' },
 209     ],
 210     'Finger' => [
 211         "Finger protocol (RFC 742)",
 212         { action => 'PARAM', proto => 'tcp', dport => '79' },
 213     ],
 214     'GNUnet' => [
 215         "GNUnet secure peer-to-peer networking traffic",
 216         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 217         { action => 'PARAM', proto => 'udp', dport => '2086' },
 218         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 219         { action => 'PARAM', proto => 'udp', dport => '1080' },
 220     ],
 221     'GRE' => [
 222         "Generic Routing Encapsulation tunneling protocol",
 223         { action => 'PARAM', proto => '47' },
 224     ],
 225     'Git' => [
 226         "Git distributed revision control traffic",
 227         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 228     ],
 229     'HKP' => [
 230         "OpenPGP HTTP keyserver protocol traffic",
 231         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 232     ],
 233     'HTTP' => [
 234         "Hypertext Transfer Protocol (WWW)",
 235         { action => 'PARAM', proto => 'tcp', dport => '80' },
 236     ],
 237     'HTTPS' => [
 238         "Hypertext Transfer Protocol (WWW) over SSL",
 239         { action => 'PARAM', proto => 'tcp', dport => '443' },
 240     ],
 241     'ICPV2' => [
 242         "Internet Cache Protocol V2 (Squid) traffic",
 243         { action => 'PARAM', proto => 'udp', dport => '3130' },
 244     ],
 245     'ICQ' => [
 246         "AOL Instant Messenger traffic",
 247         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 248     ],
 249     'IMAP' => [
 250         "Internet Message Access Protocol",
 251         { action => 'PARAM', proto => 'tcp', dport => '143' },
 252     ],
 253     'IMAPS' => [
 254         "Internet Message Access Protocol over SSL",
 255         { action => 'PARAM', proto => 'tcp', dport => '993' },
 256     ],
 257     'IPIP' => [
 258         "IPIP capsulation traffic",
 259         { action => 'PARAM', proto => '94' },
 260     ],
 261     'IPsec' => [
 262         "IPsec traffic",
 263         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 264         { action => 'PARAM', proto => '50' },
 265     ],
 266     'IPsecah' => [
 267         "IPsec authentication (AH) traffic",
 268         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 269         { action => 'PARAM', proto => '51' },
 270     ],
 271     'IPsecnat' => [
 272         "IPsec traffic and Nat-Traversal",
 273         { action => 'PARAM', proto => 'udp', dport => '500' },
 274         { action => 'PARAM', proto => 'udp', dport => '4500' },
 275         { action => 'PARAM', proto => '50' },
 276     ],
 277     'IRC' => [
 278         "Internet Relay Chat traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 280     ],
 281     'Jetdirect' => [
 282         "HP Jetdirect printing",
 283         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 284     ],
 285     'L2TP' => [
 286         "Layer 2 Tunneling Protocol traffic",
 287         { action => 'PARAM', proto => 'udp', dport => '1701' },
 288     ],
 289     'LDAP' => [
 290         "Lightweight Directory Access Protocol traffic",
 291         { action => 'PARAM', proto => 'tcp', dport => '389' },
 292     ],
 293     'LDAPS' => [
 294         "Secure Lightweight Directory Access Protocol traffic",
 295         { action => 'PARAM', proto => 'tcp', dport => '636' },
 296     ],
 297     'MSNP' => [
 298         "Microsoft Notification Protocol",
 299         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 300     ],
 301     'MSSQL' => [
 302         "Microsoft SQL Server",
 303         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 304     ],
 305     'Mail' => [
 306         "Mail traffic (SMTP, SMTPS, Submission)",
 307         { action => 'PARAM', proto => 'tcp', dport => '25' },
 308         { action => 'PARAM', proto => 'tcp', dport => '465' },
 309         { action => 'PARAM', proto => 'tcp', dport => '587' },
 310     ],
 311     'Munin' => [
 312         "Munin networked resource monitoring traffic",
 313         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 314     ],
 315     'MySQL' => [
 316         "MySQL server",
 317         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 318     ],
 319     'NNTP' => [
 320         "NNTP traffic (Usenet).",
 321         { action => 'PARAM', proto => 'tcp', dport => '119' },
 322     ],
 323     'NNTPS' => [
 324         "Encrypted NNTP traffic (Usenet)",
 325         { action => 'PARAM', proto => 'tcp', dport => '563' },
 326     ],
 327     'NTP' => [
 328         "Network Time Protocol (ntpd)",
 329         { action => 'PARAM', proto => 'udp', dport => '123' },
 330     ],
 331     'OSPF' => [
 332         "OSPF multicast traffic",
 333         { action => 'PARAM', proto => '89' },
 334     ],
 335     'OpenVPN' => [
 336         "OpenVPN traffic",
 337         { action => 'PARAM', proto => 'udp', dport => '1194' },
 338     ],
 339     'PCA' => [
 340         "Symantec PCAnywere (tm)",
 341         { action => 'PARAM', proto => 'udp', dport => '5632' },
 342         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 343     ],
 344     'POP3' => [
 345         "POP3 traffic",
 346         { action => 'PARAM', proto => 'tcp', dport => '110' },
 347     ],
 348     'POP3S' => [
 349         "Encrypted POP3 traffic",
 350         { action => 'PARAM', proto => 'tcp', dport => '995' },
 351     ],
 352     'PPtP' => [
 353         "Point-to-Point Tunneling Protocol",
 354         { action => 'PARAM', proto => '47' },
 355         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 356     ],
 357     'Ping' => [
 358         "ICMP echo request",
 359         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 360     ],
 361     'PostgreSQL' => [
 362         "PostgreSQL server",
 363         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 364     ],
 365     'Printer' => [
 366         "Line Printer protocol printing",
 367         { action => 'PARAM', proto => 'tcp', dport => '515' },
 368     ],
 369     'RDP' => [
 370         "Microsoft Remote Desktop Protocol traffic",
 371         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 372     ],
 373     'RIP' => [
 374         "Routing Information Protocol (bidirectional)",
 375         { action => 'PARAM', proto => 'udp', dport => '520' },
 376     ],
 377     'RNDC' => [
 378         "BIND remote management protocol",
 379         { action => 'PARAM', proto => 'tcp', dport => '953' },
 380     ],
 381     'Razor' => [
 382         "Razor Antispam System",
 383         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 384     ],
 385     'Rdate' => [
 386         "Remote time retrieval (rdate)",
 387         { action => 'PARAM', proto => 'tcp', dport => '37' },
 388     ],
 389     'Rsync' => [
 390         "Rsync server",
 391         { action => 'PARAM', proto => 'tcp', dport => '873' },
 392     ],
 393     'SANE' => [
 394         "SANE network scanning",
 395         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 396     ],
 397     'SMB' => [
 398         "Microsoft SMB traffic",
 399         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 400         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 401         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 402         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 403     ],
 404     'SMBswat' => [
 405         "Samba Web Administration Tool",
 406         { action => 'PARAM', proto => 'tcp', dport => '901' },
 407     ],
 408     'SMTP' => [
 409         "Simple Mail Transfer Protocol",
 410         { action => 'PARAM', proto => 'tcp', dport => '25' },
 411     ],
 412     'SMTPS' => [
 413         "Encrypted Simple Mail Transfer Protocol",
 414         { action => 'PARAM', proto => 'tcp', dport => '465' },
 415     ],
 416     'SNMP' => [
 417         "Simple Network Management Protocol",
 418         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 419         { action => 'PARAM', proto => 'tcp', dport => '161' },
 420     ],
 421     'SPAMD' => [
 422         "Spam Assassin SPAMD traffic",
 423         { action => 'PARAM', proto => 'tcp', dport => '783' },
 424     ],
 425     'SSH' => [
 426         "Secure shell traffic",
 427         { action => 'PARAM', proto => 'tcp', dport => '22' },
 428     ],
 429     'SVN' => [
 430         "Subversion server (svnserve)",
 431         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 432     ],
 433     'SixXS' => [
 434         "SixXS IPv6 Deployment and Tunnel Broker",
 435         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 436         { action => 'PARAM', proto => 'udp', dport => '3740' },
 437         { action => 'PARAM', proto => '41' },
 438         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 439     ],
 440     'Squid' => [
 441         "Squid web proxy traffic",
 442         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 443     ],
 444     'Submission' => [
 445         "Mail message submission traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '587' },
 447     ],
 448     'Syslog' => [
 449         "Syslog protocol (RFC 5424) traffic",
 450         { action => 'PARAM', proto => 'udp', dport => '514' },
 451         { action => 'PARAM', proto => 'tcp', dport => '514' },
 452     ],
 453     'TFTP' => [
 454         "Trivial File Transfer Protocol traffic",
 455         { action => 'PARAM', proto => 'udp', dport => '69' },
 456     ],
 457     'Telnet' => [
 458         "Telnet traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '23' },
 460     ],
 461     'Telnets' => [
 462         "Telnet over SSL",
 463         { action => 'PARAM', proto => 'tcp', dport => '992' },
 464     ],
 465     'Time' => [
 466         "RFC 868 Time protocol",
 467         { action => 'PARAM', proto => 'tcp', dport => '37' },
 468     ],
 469     'Trcrt' => [
 470         "Traceroute (for up to 30 hops) traffic",
 471         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 472         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 473     ],
 474     'VNC' => [
 475         "VNC traffic for VNC display's 0 - 99",
 476         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 477     ],
 478     'VNCL' => [
 479         "VNC traffic from Vncservers to Vncviewers in listen mode",
 480         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 481     ],
 482     'Web' => [
 483         "WWW traffic (HTTP and HTTPS)",
 484         { action => 'PARAM', proto => 'tcp', dport => '80' },
 485         { action => 'PARAM', proto => 'tcp', dport => '443' },
 486     ],
 487     'Webcache' => [
 488         "Web Cache/Proxy traffic (port 8080)",
 489         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 490     ],
 491     'Webmin' => [
 492         "Webmin traffic",
 493         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 494     ],
 495     'Whois' => [
 496         "Whois (nicname, RFC 3912) traffic",
 497         { action => 'PARAM', proto => 'tcp', dport => '43' },
 498     ],
 499 };
 500
 501 my $pve_fw_parsed_macros;
 502 my $pve_fw_macro_descr;
 503 my $pve_fw_preferred_macro_names = {};
 504
 505 my $pve_std_chains = {};
 506 $pve_std_chains->{4} = {
 507     'PVEFW-SET-ACCEPT-MARK' => [
 508         "-j MARK --set-mark 1",
 509     ],
 510     'PVEFW-DropBroadcast' => [
 511         # same as shorewall 'Broadcast'
 512         # simply DROP BROADCAST/MULTICAST/ANYCAST
 513         # we can use this to reduce logging
 514         { action => 'DROP', dsttype => 'BROADCAST' },
 515         { action => 'DROP', dsttype => 'MULTICAST' },
 516         { action => 'DROP', dsttype => 'ANYCAST' },
 517         { action => 'DROP', dest => '224.0.0.0/4' },
 518     ],
 519     'PVEFW-reject' => [
 520         # same as shorewall 'reject'
 521         { action => 'DROP', dsttype => 'BROADCAST' },
 522         { action => 'DROP', source => '224.0.0.0/4' },
 523         { action => 'DROP', proto => 'icmp' },
 524         "-p tcp -j REJECT --reject-with tcp-reset",
 525         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 526         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 527         "-j REJECT --reject-with icmp-host-prohibited",
 528     ],
 529     'PVEFW-Drop' => [
 530         # same as shorewall 'Drop', which is equal to DROP,
 531         # but REJECT/DROP some packages to reduce logging,
 532         # and ACCEPT critical ICMP types
 533         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 534         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 535         { action => 'PVEFW-DropBroadcast' },
 536         # ACCEPT critical ICMP types
 537         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 538         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 539         # Drop packets with INVALID state
 540         "-m conntrack --ctstate INVALID -j DROP",
 541         # Drop Microsoft SMB noise
 542         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 543         { action => 'DROP', proto => 'udp', dport => '137:139'},
 544         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 545         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 546         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 547         # Drop new/NotSyn traffic so that it doesn't get logged
 548         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 549         # Drop DNS replies
 550         { action => 'DROP', proto => 'udp', sport => 53 },
 551     ],
 552     'PVEFW-Reject' => [
 553         # same as shorewall 'Reject', which is equal to Reject,
 554         # but REJECT/DROP some packages to reduce logging,
 555         # and ACCEPT critical ICMP types
 556         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 557         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 558         { action => 'PVEFW-DropBroadcast' },
 559         # ACCEPT critical ICMP types
 560         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 561         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 562         # Drop packets with INVALID state
 563         "-m conntrack --ctstate INVALID -j DROP",
 564         # Drop Microsoft SMB noise
 565         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 566         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 567         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 568         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 569         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 570         # Drop new/NotSyn traffic so that it doesn't get logged
 571         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 572         # Drop DNS replies
 573         { action => 'DROP', proto => 'udp', sport => 53 },
 574     ],
 575     'PVEFW-tcpflags' => [
 576         # same as shorewall tcpflags action.
 577         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 578         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 579         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 580         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 581         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 582         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 583     ],
 584     'PVEFW-smurfs' => [
 585         # same as shorewall smurfs action
 586         # Filter packets for smurfs (packets with a broadcast address as the source).
 587         "-s 0.0.0.0/32 -j RETURN",
 588         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 589         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 590     ],
 591 };
 592
 593 $pve_std_chains->{6} = {
 594     'PVEFW-SET-ACCEPT-MARK' => [
 595         "-j MARK --set-mark 1",
 596     ],
 597     'PVEFW-DropBroadcast' => [
 598         # same as shorewall 'Broadcast'
 599         # simply DROP BROADCAST/MULTICAST/ANYCAST
 600         # we can use this to reduce logging
 601         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 602         # ipv6 addrtype does not work with kernel 2.6.32
 603         #{ action => 'DROP', dsttype => 'MULTICAST' },
 604         #{ action => 'DROP', dsttype => 'ANYCAST' },
 605         { action => 'DROP', dest => 'ff00::/8' },
 606         #{ action => 'DROP', dest => '224.0.0.0/4' },
 607     ],
 608     'PVEFW-reject' => [
 609         # same as shorewall 'reject'
 610         #{ action => 'DROP', dsttype => 'BROADCAST' },
 611         #{ action => 'DROP', source => '224.0.0.0/4' },
 612         { action => 'DROP', proto => 'icmpv6' },
 613         "-p tcp -j REJECT --reject-with tcp-reset",
 614         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 615         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 616         #"-j REJECT --reject-with icmp-host-prohibited",
 617     ],
 618     'PVEFW-Drop' => [
 619         # same as shorewall 'Drop', which is equal to DROP,
 620         # but REJECT/DROP some packages to reduce logging,
 621         # and ACCEPT critical ICMP types
 622         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 623         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 624         { action => 'PVEFW-DropBroadcast' },
 625         # ACCEPT critical ICMP types
 626         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 627         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 628         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 629
 630         # Drop packets with INVALID state
 631         "-m conntrack --ctstate INVALID -j DROP",
 632         # Drop Microsoft SMB noise
 633         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 634         { action => 'DROP', proto => 'udp', dport => '137:139'},
 635         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 636         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 637         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 638         # Drop new/NotSyn traffic so that it doesn't get logged
 639         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 640         # Drop DNS replies
 641         { action => 'DROP', proto => 'udp', sport => 53 },
 642     ],
 643     'PVEFW-Reject' => [
 644         # same as shorewall 'Reject', which is equal to Reject,
 645         # but REJECT/DROP some packages to reduce logging,
 646         # and ACCEPT critical ICMP types
 647         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 648         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 649         { action => 'PVEFW-DropBroadcast' },
 650         # ACCEPT critical ICMP types
 651         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 652         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 653         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 654
 655         # Drop packets with INVALID state
 656         "-m conntrack --ctstate INVALID -j DROP",
 657         # Drop Microsoft SMB noise
 658         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 659         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 660         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 661         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 662         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 663         # Drop new/NotSyn traffic so that it doesn't get logged
 664         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 665         # Drop DNS replies
 666         { action => 'DROP', proto => 'udp', sport => 53 },
 667     ],
 668     'PVEFW-tcpflags' => [
 669         # same as shorewall tcpflags action.
 670         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 671         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 672         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 673         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 674         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 675         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 676     ],
 677 };
 678
 679 # iptables -p icmp -h
 680 my $icmp_type_names = {
 681     any => 1,
 682     'echo-reply' => 1,
 683     'destination-unreachable' => 1,
 684     'network-unreachable' => 1,
 685     'host-unreachable' => 1,
 686     'protocol-unreachable' => 1,
 687     'port-unreachable' => 1,
 688     'fragmentation-needed' => 1,
 689     'source-route-failed' => 1,
 690     'network-unknown' => 1,
 691     'host-unknown' => 1,
 692     'network-prohibited' => 1,
 693     'host-prohibited' => 1,
 694     'TOS-network-unreachable' => 1,
 695     'TOS-host-unreachable' => 1,
 696     'communication-prohibited' => 1,
 697     'host-precedence-violation' => 1,
 698     'precedence-cutoff' => 1,
 699     'source-quench' => 1,
 700     'redirect' => 1,
 701     'network-redirect' => 1,
 702     'host-redirect' => 1,
 703     'TOS-network-redirect' => 1,
 704     'TOS-host-redirect' => 1,
 705     'echo-request' => 1,
 706     'router-advertisement' => 1,
 707     'router-solicitation' => 1,
 708     'time-exceeded' => 1,
 709     'ttl-zero-during-transit' => 1,
 710     'ttl-zero-during-reassembly' => 1,
 711     'parameter-problem' => 1,
 712     'ip-header-bad' => 1,
 713     'required-option-missing' => 1,
 714     'timestamp-request' => 1,
 715     'timestamp-reply' => 1,
 716     'address-mask-request' => 1,
 717     'address-mask-reply' => 1,
 718 };
 719
 720 # ip6tables -p icmpv6 -h
 721
 722 my $icmpv6_type_names = {
 723     'any' => 1,
 724     'destination-unreachable' => 1,
 725     'no-route' => 1,
 726     'communication-prohibited' => 1,
 727     'address-unreachable' => 1,
 728     'port-unreachable' => 1,
 729     'packet-too-big' => 1,
 730     'time-exceeded' => 1,
 731     'ttl-zero-during-transit' => 1,
 732     'ttl-zero-during-reassembly' => 1,
 733     'parameter-problem' => 1,
 734     'bad-header' => 1,
 735     'unknown-header-type' => 1,
 736     'unknown-option' => 1,
 737     'echo-request' => 1,
 738     'echo-reply' => 1,
 739     'router-solicitation' => 1,
 740     'router-advertisement' => 1,
 741     'neighbour-solicitation' => 1,
 742     'neighbour-advertisement' => 1,
 743     'redirect' => 1,
 744 };
 745
 746 sub init_firewall_macros {
 747
 748     $pve_fw_parsed_macros = {};
 749
 750     foreach my $k (keys %$pve_fw_macros) {
 751         my $lc_name = lc($k);
 752         my $macro = $pve_fw_macros->{$k};
 753         if (!ref($macro->[0])) {
 754             $pve_fw_macro_descr->{$k} = shift @$macro;
 755         }
 756         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 757         $pve_fw_parsed_macros->{$k} = $macro;
 758     }
 759 }
 760
 761 init_firewall_macros();
 762
 763 sub get_macros {
 764     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 765 }
 766
 767 my $etc_services;
 768
 769 sub get_etc_services {
 770
 771     return $etc_services if $etc_services;
 772
 773     my $filename = "/etc/services";
 774
 775     my $fh = IO::File->new($filename, O_RDONLY);
 776     if (!$fh) {
 777         warn "unable to read '$filename' - $!\n";
 778         return {};
 779     }
 780
 781     my $services = {};
 782
 783     while (my $line = <$fh>) {
 784         chomp ($line);
 785         next if $line =~m/^#/;
 786         next if ($line =~m/^\s*$/);
 787
 788         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 789             $services->{byid}->{$2}->{name} = $1;
 790             $services->{byid}->{$2}->{port} = $2;
 791             $services->{byid}->{$2}->{$3} = 1;
 792             $services->{byname}->{$1} = $services->{byid}->{$2};
 793         }
 794     }
 795
 796     close($fh);
 797
 798     $etc_services = $services;
 799
 800
 801     return $etc_services;
 802 }
 803
 804 my $etc_protocols;
 805
 806 sub get_etc_protocols {
 807     return $etc_protocols if $etc_protocols;
 808
 809     my $filename = "/etc/protocols";
 810
 811     my $fh = IO::File->new($filename, O_RDONLY);
 812     if (!$fh) {
 813         warn "unable to read '$filename' - $!\n";
 814         return {};
 815     }
 816
 817     my $protocols = {};
 818
 819     while (my $line = <$fh>) {
 820         chomp ($line);
 821         next if $line =~m/^#/;
 822         next if ($line =~m/^\s*$/);
 823
 824         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 825             $protocols->{byid}->{$2}->{name} = $1;
 826             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 827         }
 828     }
 829
 830     close($fh);
 831
 832     # add special case for ICMP v6
 833     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 834     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 835
 836     $etc_protocols = $protocols;
 837
 838     return $etc_protocols;
 839 }
 840
 841 my $ipv4_mask_hash_localnet = {
 842     '255.255.0.0' => 16,
 843     '255.255.128.0' => 17,
 844     '255.255.192.0' => 18,
 845     '255.255.224.0' => 19,
 846     '255.255.240.0' => 20,
 847     '255.255.248.0' => 21,
 848     '255.255.252.0' => 22,
 849     '255.255.254.0' => 23,
 850     '255.255.255.0' => 24,
 851     '255.255.255.128' => 25,
 852     '255.255.255.192' => 26,
 853     '255.255.255.224' => 27,
 854     '255.255.255.240' => 28,
 855     '255.255.255.248' => 29,
 856     '255.255.255.252' => 30,
 857 };
 858
 859 my $__local_network;
 860
 861 sub local_network {
 862     my ($new_value) = @_;
 863
 864     $__local_network = $new_value if defined($new_value);
 865
 866     return $__local_network if defined($__local_network);
 867
 868     eval {
 869         my $nodename = PVE::INotify::nodename();
 870
 871         my $ip = PVE::Cluster::remote_node_ip($nodename);
 872
 873         my $testip = Net::IP->new($ip);
 874
 875         my $routes = PVE::ProcFSTools::read_proc_net_route();
 876         foreach my $entry (@$routes) {
 877             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 878             next if !defined($mask);
 879             return if $mask eq '0.0.0.0';
 880             my $cidr = "$entry->{dest}/$mask";
 881             my $testnet = Net::IP->new($cidr);
 882             if ($testnet->overlaps($testip)) {
 883                 $__local_network = $cidr;
 884                 return;
 885             }
 886         }
 887     };
 888     warn $@ if $@;
 889
 890     return $__local_network;
 891 }
 892
 893 # ipset names are limited to 31 characters,
 894 # and we use '-v4' or '-v6' to indicate IP versions,
 895 # and we use '_swap' suffix for atomic update,
 896 # for example PVEFW-${VMID}-${ipset_name}_swap
 897
 898 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 899
 900 sub compute_ipset_chain_name {
 901     my ($vmid, $ipset_name, $ipversion) = @_;
 902
 903     $vmid = 0 if !defined($vmid);
 904
 905     my $id = "$vmid-${ipset_name}-v$ipversion";
 906
 907     if (length($id) > $max_iptables_ipset_name_length) {
 908         $id = PVE::Tools::fnv31a_hex($id);
 909     }
 910
 911     return "PVEFW-$id";
 912 }
 913
 914 sub compute_ipfilter_ipset_name {
 915     my ($iface) = @_;
 916
 917     return "ipfilter-$iface";
 918 }
 919
 920 sub parse_address_list {
 921     my ($str) = @_;
 922
 923     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 924         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 925         return;
 926     }
 927
 928     if ($str =~ m/^${ip_alias_pattern}$/) {
 929         die "alias name too long\n" if length($str) > $max_alias_name_length;
 930         return;
 931     }
 932
 933     my $count = 0;
 934     my $iprange = 0;
 935     my $ipversion;
 936
 937     foreach my $elem (split(/,/, $str)) {
 938         $count++;
 939         my $ip = Net::IP->new($elem);
 940         if (!$ip) {
 941             my $err = Net::IP::Error();
 942             die "invalid IP address: $err\n";
 943         }
 944         $iprange = 1 if $elem =~ m/-/;
 945
 946         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 947
 948         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 949             if $ipversion && ($new_ipversion != $ipversion);
 950
 951         $ipversion = $new_ipversion;
 952     }
 953
 954     die "you can't use a range in a list\n" if $iprange && $count > 1;
 955
 956     return $ipversion;
 957 }
 958
 959 sub parse_port_name_number_or_range {
 960     my ($str) = @_;
 961
 962     my $services = PVE::Firewall::get_etc_services();
 963     my $count = 0;
 964     my $icmp_port = 0;
 965
 966     foreach my $item (split(/,/, $str)) {
 967         $count++;
 968         if ($item =~ m/^(\d+):(\d+)$/) {
 969             my ($port1, $port2) = ($1, $2);
 970             die "invalid port '$port1'\n" if $port1 > 65535;
 971             die "invalid port '$port2'\n" if $port2 > 65535;
 972         } elsif ($item =~ m/^(\d+)$/) {
 973             my $port = $1;
 974             die "invalid port '$port'\n" if $port > 65535;
 975         } else {
 976             if ($icmp_type_names->{$item}) {
 977                 $icmp_port = 1;
 978             } elsif ($icmpv6_type_names->{$item}) {
 979                 $icmp_port = 1;
 980             } else {
 981                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 982             }
 983         }
 984     }
 985
 986     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 987
 988     return $count;
 989 }
 990
 991 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 992 sub pve_fw_verify_port_spec {
 993    my ($portstr) = @_;
 994
 995    parse_port_name_number_or_range($portstr);
 996
 997    return $portstr;
 998 }
 999
1000 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1001 sub pve_fw_verify_addr_spec {
1002    my ($list) = @_;
1003
1004    parse_address_list($list);
1005
1006    return $list;
1007 }
1008
1009 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1010 sub pve_fw_verify_protocol_spec {
1011    my ($proto) = @_;
1012
1013    my $protocols = get_etc_protocols();
1014
1015    die "unknown protocol '$proto'\n" if $proto &&
1016        !(defined($protocols->{byname}->{$proto}) ||
1017          defined($protocols->{byid}->{$proto}));
1018
1019    return $proto;
1020 }
1021
1022
1023 # helper function for API
1024
1025 sub copy_opject_with_digest {
1026     my ($object) = @_;
1027
1028     my $sha = Digest::SHA->new('sha1');
1029
1030     my $res = {};
1031     foreach my $k (sort keys %$object) {
1032         my $v = $object->{$k};
1033         next if !defined($v);
1034         $res->{$k} = $v;
1035         $sha->add($k, ':', $v, "\n");
1036     }
1037
1038     my $digest = $sha->hexdigest;
1039
1040     $res->{digest} = $digest;
1041
1042     return wantarray ? ($res, $digest) : $res;
1043 }
1044
1045 sub copy_list_with_digest {
1046     my ($list) = @_;
1047
1048     my $sha = Digest::SHA->new('sha1');
1049
1050     my $res = [];
1051     foreach my $entry (@$list) {
1052         my $data = {};
1053         foreach my $k (sort keys %$entry) {
1054             my $v = $entry->{$k};
1055             next if !defined($v);
1056             $data->{$k} = $v;
1057             # Note: digest ignores refs ($rule->{errors})
1058             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1059         }
1060         push @$res, $data;
1061     }
1062
1063     my $digest = $sha->hexdigest;
1064
1065     foreach my $entry (@$res) {
1066         $entry->{digest} = $digest;
1067     }
1068
1069     return wantarray ? ($res, $digest) : $res;
1070 }
1071
1072 my $rule_properties = {
1073     pos => {
1074         description => "Update rule at position <pos>.",
1075         type => 'integer',
1076         minimum => 0,
1077         optional => 1,
1078     },
1079     digest => get_standard_option('pve-config-digest'),
1080     type => {
1081         type => 'string',
1082         optional => 1,
1083         enum => ['in', 'out', 'group'],
1084     },
1085     action => {
1086         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1087         type => 'string',
1088         optional => 1,
1089         pattern => $security_group_name_pattern,
1090         maxLength => 20,
1091         minLength => 2,
1092     },
1093     macro => {
1094         type => 'string',
1095         optional => 1,
1096         maxLength => 128,
1097     },
1098     iface => get_standard_option('pve-iface', { optional => 1 }),
1099     source => {
1100         type => 'string', format => 'pve-fw-addr-spec',
1101         optional => 1,
1102     },
1103     dest => {
1104         type => 'string', format => 'pve-fw-addr-spec',
1105         optional => 1,
1106     },
1107     proto => {
1108         type => 'string', format => 'pve-fw-protocol-spec',
1109         optional => 1,
1110     },
1111     enable => {
1112         type => 'integer',
1113         minimum => 0,
1114         optional => 1,
1115     },
1116     sport => {
1117         type => 'string', format => 'pve-fw-port-spec',
1118         optional => 1,
1119     },
1120     dport => {
1121         type => 'string', format => 'pve-fw-port-spec',
1122         optional => 1,
1123     },
1124     comment => {
1125         type => 'string',
1126         optional => 1,
1127     },
1128 };
1129
1130 sub add_rule_properties {
1131     my ($properties) = @_;
1132
1133     foreach my $k (keys %$rule_properties) {
1134         my $h = $rule_properties->{$k};
1135         # copy data, so that we can modify later without side effects
1136         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1137     }
1138
1139     return $properties;
1140 }
1141
1142 sub delete_rule_properties {
1143     my ($rule, $delete_str) = @_;
1144
1145     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1146         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1147             if !defined($rule_properties->{$opt});
1148         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1149             if $opt eq 'type' || $opt eq 'action';
1150         delete $rule->{$opt};
1151     }
1152
1153     return $rule;
1154 }
1155
1156 my $apply_macro = sub {
1157     my ($macro_name, $param, $verify, $ipversion) = @_;
1158
1159     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1160     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1161
1162     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1163         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1164     }
1165
1166     my $rules = [];
1167
1168     foreach my $templ (@$macro_rules) {
1169         my $rule = {};
1170         my $param_used = {};
1171         foreach my $k (keys %$templ) {
1172             my $v = $templ->{$k};
1173             if ($v eq 'PARAM') {
1174                 $v = $param->{$k};
1175                 $param_used->{$k} = 1;
1176             } elsif ($v eq 'DEST') {
1177                 $v = $param->{dest};
1178                 $param_used->{dest} = 1;
1179             } elsif ($v eq 'SOURCE') {
1180                 $v = $param->{source};
1181                 $param_used->{source} = 1;
1182             }
1183
1184             if (!defined($v)) {
1185                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1186                 raise_param_exc({ macro => $msg }) if $verify;
1187                 die "$msg\n";
1188             }
1189             $rule->{$k} = $v;
1190         }
1191         foreach my $k (keys %$param) {
1192             next if $k eq 'macro';
1193             next if !defined($param->{$k});
1194             next if $param_used->{$k};
1195             if (defined($rule->{$k})) {
1196                 if ($rule->{$k} ne $param->{$k}) {
1197                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1198                     raise_param_exc({ $k => $msg }) if $verify;
1199                     die "$msg\n";
1200                 }
1201             } else {
1202                 $rule->{$k} = $param->{$k};
1203             }
1204         }
1205         push @$rules, $rule;
1206     }
1207
1208     return $rules;
1209 };
1210
1211 my $rule_env_iface_lookup = {
1212     'ct' => 1,
1213     'vm' => 1,
1214     'group' => 0,
1215     'cluster' => 1,
1216     'host' => 1,
1217 };
1218
1219 sub verify_rule {
1220     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1221
1222     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1223
1224     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1225     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1226
1227     my $errors = $rule->{errors} || {};
1228
1229     my $error_count = 0;
1230
1231     my $add_error = sub {
1232         my ($param, $msg)  = @_;
1233         chomp $msg;
1234         raise_param_exc({ $param => $msg }) if !$noerr;
1235         $error_count++;
1236         $errors->{$param} = $msg if !$errors->{$param};
1237     };
1238
1239     my $ipversion;
1240     my $set_ip_version = sub {
1241         my $vers = shift;
1242         if ($vers) {
1243             die "detected mixed ipv4/ipv6 adresses in rule\n"
1244                 if $ipversion && ($vers != $ipversion);
1245             $ipversion = $vers;
1246         }
1247     };
1248
1249     my $check_ipset_or_alias_property = sub {
1250         my ($name, $expected_ipversion) = @_;
1251
1252         if (my $value = $rule->{$name}) {
1253             if ($value =~ m/^\+/) {
1254                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1255                     &$add_error($name, "no such ipset '$1'")
1256                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1257
1258                 } else {
1259                     &$add_error($name, "invalid ipset name '$value'");
1260                 }
1261             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1262                 my $alias = lc($value);
1263                 &$add_error($name, "no such alias '$value'")
1264                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1265                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1266                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1267
1268                 &$set_ip_version($e->{ipversion});
1269             }
1270         }
1271     };
1272
1273     my $type = $rule->{type};
1274     my $action = $rule->{action};
1275
1276     &$add_error('type', "missing property") if !$type;
1277     &$add_error('action', "missing property") if !$action;
1278
1279     if ($type) {
1280         if ($type eq  'in' || $type eq 'out') {
1281             &$add_error('action', "unknown action '$action'")
1282                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1283         } elsif ($type eq 'group') {
1284             &$add_error('type', "security groups not allowed")
1285                 if !$allow_groups;
1286             &$add_error('action', "invalid characters in security group name")
1287                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1288         } else {
1289             &$add_error('type', "unknown rule type '$type'");
1290         }
1291     }
1292
1293     if ($rule->{iface}) {
1294         &$add_error('type', "parameter -i not allowed for this rule type")
1295             if !$allow_iface;
1296         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1297         &$add_error('iface', $@) if $@;
1298         if ($rule_env eq 'vm') {
1299             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1300                 if $rule->{iface} !~  m/^net(\d+)$/;
1301         } elsif ($rule_env eq 'ct') {
1302             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1303                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1304         }
1305     }
1306
1307     if ($rule->{macro}) {
1308         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1309             $rule->{macro} = $preferred_name;
1310         } else {
1311             &$add_error('macro', "unknown macro '$rule->{macro}'");
1312         }
1313     }
1314
1315     if ($rule->{proto}) {
1316         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1317         &$add_error('proto', $@) if $@;
1318         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1319         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1320     }
1321
1322     if ($rule->{dport}) {
1323         eval { parse_port_name_number_or_range($rule->{dport}); };
1324         &$add_error('dport', $@) if $@;
1325         &$add_error('proto', "missing property - 'dport' requires this property")
1326             if !$rule->{proto};
1327     }
1328
1329     if ($rule->{sport}) {
1330         eval { parse_port_name_number_or_range($rule->{sport}); };
1331         &$add_error('sport', $@) if $@;
1332         &$add_error('proto', "missing property - 'sport' requires this property")
1333             if !$rule->{proto};
1334     }
1335
1336     if ($rule->{source}) {
1337         eval {
1338             my $source_ipversion = parse_address_list($rule->{source});
1339             &$set_ip_version($source_ipversion);
1340         };
1341         &$add_error('source', $@) if $@;
1342         &$check_ipset_or_alias_property('source', $ipversion);
1343     }
1344
1345     if ($rule->{dest}) {
1346         eval {
1347             my $dest_ipversion = parse_address_list($rule->{dest});
1348             &$set_ip_version($dest_ipversion);
1349         };
1350         &$add_error('dest', $@) if $@;
1351         &$check_ipset_or_alias_property('dest', $ipversion);
1352     }
1353
1354     $rule->{ipversion} = $ipversion if $ipversion;
1355
1356     if ($rule->{macro} && !$error_count) {
1357         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1358         if (my $err = $@) {
1359             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1360                 my $eh = $err->{errors};
1361                 foreach my $p (keys %$eh) {
1362                     &$add_error($p, $eh->{$p});
1363                 }
1364             } else {
1365                 &$add_error('macro', "$err");
1366             }
1367         }
1368     }
1369
1370     $rule->{errors} = $errors if $error_count;
1371
1372     return $rule;
1373 }
1374
1375 sub copy_rule_data {
1376     my ($rule, $param) = @_;
1377
1378     foreach my $k (keys %$rule_properties) {
1379         if (defined(my $v = $param->{$k})) {
1380             if ($v eq '' || $v eq '-') {
1381                 delete $rule->{$k};
1382             } else {
1383                 $rule->{$k} = $v;
1384             }
1385         }
1386     }
1387
1388     return $rule;
1389 }
1390
1391 sub rules_modify_permissions {
1392     my ($rule_env) = @_;
1393
1394     if ($rule_env eq 'host') {
1395         return {
1396             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1397         };
1398     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1399         return {
1400             check => ['perm', '/', [ 'Sys.Modify' ]],
1401         };
1402     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1403         return {
1404             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1405         }
1406     }
1407
1408     return undef;
1409 }
1410
1411 sub rules_audit_permissions {
1412     my ($rule_env) = @_;
1413
1414     if ($rule_env eq 'host') {
1415         return {
1416             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1417         };
1418     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1419         return {
1420             check => ['perm', '/', [ 'Sys.Audit' ]],
1421         };
1422     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1423         return {
1424             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1425         }
1426     }
1427
1428     return undef;
1429 }
1430
1431 # core functions
1432 my $bridge_firewall_enabled = 0;
1433
1434 sub enable_bridge_firewall {
1435
1436     return if $bridge_firewall_enabled; # only once
1437
1438     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1439     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1440
1441     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1442     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1443
1444     $bridge_firewall_enabled = 1;
1445 }
1446
1447 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1448
1449 sub iptables_restore_cmdlist {
1450     my ($cmdlist) = @_;
1451
1452     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1453 }
1454
1455 sub ip6tables_restore_cmdlist {
1456     my ($cmdlist) = @_;
1457
1458     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1459 }
1460
1461 sub ipset_restore_cmdlist {
1462     my ($cmdlist) = @_;
1463
1464     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1465 }
1466
1467 sub iptables_get_chains {
1468     my ($iptablescmd) = @_;
1469
1470     $iptablescmd = "iptables" if !$iptablescmd;
1471
1472     my $res = {};
1473
1474     # check what chains we want to track
1475     my $is_pvefw_chain = sub {
1476         my $name = shift;
1477
1478         return 1 if $name =~ m/^PVEFW-\S+$/;
1479
1480         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1481
1482         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1483
1484         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1485
1486         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1487         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1488
1489         return undef;
1490     };
1491
1492     my $table = '';
1493
1494     my $hooks = {};
1495
1496     my $parser = sub {
1497         my $line = shift;
1498
1499         return if $line =~ m/^#/;
1500         return if $line =~ m/^\s*$/;
1501
1502         if ($line =~ m/^\*(\S+)$/) {
1503             $table = $1;
1504             return;
1505         }
1506
1507         return if $table ne 'filter';
1508
1509         if ($line =~ m/^:(\S+)\s/) {
1510             my $chain = $1;
1511             return if !&$is_pvefw_chain($chain);
1512             $res->{$chain} = "unknown";
1513         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1514             my ($chain, $sig) = ($1, $2);
1515             return if !&$is_pvefw_chain($chain);
1516             $res->{$chain} = $sig;
1517         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1518             $hooks->{$1} = 1;
1519         } else {
1520             # simply ignore the rest
1521             return;
1522         }
1523     };
1524
1525     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1526
1527     return wantarray ? ($res, $hooks) : $res;
1528 }
1529
1530 sub iptables_chain_digest {
1531     my ($rules) = @_;
1532     my $digest = Digest::SHA->new('sha1');
1533     foreach my $rule (@$rules) { # order is important
1534         $digest->add($rule);
1535     }
1536     return $digest->b64digest;
1537 }
1538
1539 sub ipset_chain_digest {
1540     my ($rules) = @_;
1541
1542     my $digest = Digest::SHA->new('sha1');
1543     foreach my $rule (sort @$rules) { # note: sorted
1544         $digest->add($rule);
1545     }
1546     return $digest->b64digest;
1547 }
1548
1549 sub ipset_get_chains {
1550
1551     my $res = {};
1552     my $chains = {};
1553
1554     my $parser = sub {
1555         my $line = shift;
1556
1557         return if $line =~ m/^#/;
1558         return if $line =~ m/^\s*$/;
1559         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1560             my $chain = $1;
1561             $line =~ s/\s+$//; # delete trailing white space
1562             push @{$chains->{$chain}}, $line;
1563         } else {
1564             # simply ignore the rest
1565             return;
1566         }
1567     };
1568
1569     run_command("/sbin/ipset save", outfunc => $parser);
1570
1571     # compute digest for each chain
1572     foreach my $chain (keys %$chains) {
1573         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1574     }
1575
1576     return $res;
1577 }
1578
1579 sub ruleset_generate_cmdstr {
1580     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1581
1582     return if defined($rule->{enable}) && !$rule->{enable};
1583     return if $rule->{errors};
1584
1585     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1586
1587     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1588     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1589
1590     my @cmd = ();
1591
1592     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1593     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1594
1595     my $source = $rule->{source};
1596     my $dest = $rule->{dest};
1597
1598     if ($source) {
1599         if ($source =~ m/^\+/) {
1600             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1601                 my $name = $1;
1602                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1603                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1604                     push @cmd, "-m set --match-set ${ipset_chain} src";
1605                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1606                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1607                     push @cmd, "-m set --match-set ${ipset_chain} src";
1608                 } else {
1609                     die "no such ipset '$name'\n";
1610                 }
1611             } else {
1612                 die "invalid security group name '$source'\n";
1613             }
1614         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1615             my $alias = lc($source);
1616             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1617             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1618             die "no such alias '$source'\n" if !$e;
1619             push @cmd, "-s $e->{cidr}";
1620         } elsif ($source =~ m/\-/){
1621             push @cmd, "-m iprange --src-range $source";
1622         } else {
1623             push @cmd, "-s $source";
1624         }
1625     }
1626
1627     if ($dest) {
1628         if ($dest =~ m/^\+/) {
1629             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1630                 my $name = $1;
1631                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1632                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1633                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1634                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1635                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1636                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1637                 } else {
1638                     die "no such ipset '$name'\n";
1639                 }
1640             } else {
1641                 die "invalid security group name '$dest'\n";
1642             }
1643         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1644             my $alias = lc($dest);
1645             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1646             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1647             die "no such alias '$dest'\n" if !$e;
1648             push @cmd, "-d $e->{cidr}";
1649         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1650             push @cmd, "-m iprange --dst-range $dest";
1651         } else {
1652             push @cmd, "-d $dest";
1653         }
1654     }
1655
1656     if ($rule->{proto}) {
1657         push @cmd, "-p $rule->{proto}";
1658
1659         my $multiport = 0;
1660         $multiport++ if $nbdport > 1;
1661         $multiport++ if $nbsport > 1;
1662
1663         push @cmd, "--match multiport" if $multiport;
1664
1665         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1666             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1667
1668         if ($rule->{dport}) {
1669             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1670                 # Note: we use dport to store --icmp-type
1671                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1672                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1673             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1674                 # Note: we use dport to store --icmpv6-type
1675                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1676                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1677             } else {
1678                 if ($nbdport > 1) {
1679                     if ($multiport == 2) {
1680                         push @cmd,  "--ports $rule->{dport}";
1681                     } else {
1682                         push @cmd, "--dports $rule->{dport}";
1683                     }
1684                 } else {
1685                     push @cmd, "--dport $rule->{dport}";
1686                 }
1687             }
1688         }
1689
1690         if ($rule->{sport}) {
1691             if ($nbsport > 1) {
1692                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1693             } else {
1694                 push @cmd, "--sport $rule->{sport}";
1695             }
1696         }
1697     } elsif ($rule->{dport} || $rule->{sport}) {
1698         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1699         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1700     }
1701
1702     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1703
1704     if (my $action = $rule->{action}) {
1705         $action = $actions->{$action} if defined($actions->{$action});
1706         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1707         push @cmd, $goto ? "-g $action" : "-j $action";
1708     }
1709
1710     return scalar(@cmd) ? join(' ', @cmd) : undef;
1711 }
1712
1713 sub ruleset_generate_rule {
1714     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1715
1716     my $rules;
1717
1718     if ($rule->{macro}) {
1719         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1720     } else {
1721         $rules = [ $rule ];
1722     }
1723
1724     # update all or nothing
1725
1726     my @cmds = ();
1727     foreach my $tmp (@$rules) {
1728         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1729             push @cmds, $cmdstr;
1730         }
1731     }
1732
1733     foreach my $cmdstr (@cmds) {
1734         ruleset_addrule($ruleset, $chain, $cmdstr);
1735     }
1736 }
1737
1738 sub ruleset_generate_rule_insert {
1739     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1740
1741     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1742
1743     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1744         ruleset_insertrule($ruleset, $chain, $cmdstr);
1745     }
1746 }
1747
1748 sub ruleset_create_chain {
1749     my ($ruleset, $chain) = @_;
1750
1751     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1752     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1753
1754     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1755
1756     $ruleset->{$chain} = [];
1757 }
1758
1759 sub ruleset_chain_exist {
1760     my ($ruleset, $chain) = @_;
1761
1762     return $ruleset->{$chain} ? 1 : undef;
1763 }
1764
1765 sub ruleset_addrule {
1766    my ($ruleset, $chain, $rule) = @_;
1767
1768    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1769
1770    push @{$ruleset->{$chain}}, "-A $chain $rule";
1771 }
1772
1773 sub ruleset_insertrule {
1774    my ($ruleset, $chain, $rule) = @_;
1775
1776    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1777
1778    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1779 }
1780
1781 sub get_log_rule_base {
1782     my ($chain, $vmid, $msg, $loglevel) = @_;
1783
1784     die "internal error - no log level" if !defined($loglevel);
1785
1786     $vmid = 0 if !defined($vmid);
1787
1788     # Note: we use special format for prefix to pass further
1789     # info to log daemon (VMID, LOGVELEL and CHAIN)
1790
1791     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1792 }
1793
1794 sub ruleset_addlog {
1795     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1796
1797     return if !defined($loglevel);
1798
1799     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1800
1801     $logrule = "$rule $logrule" if defined($rule);
1802
1803     ruleset_addrule($ruleset, $chain, $logrule);
1804 }
1805
1806 sub ruleset_add_chain_policy {
1807     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1808
1809     if ($policy eq 'ACCEPT') {
1810
1811         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1812                               { ACCEPT =>  $accept_action});
1813
1814     } elsif ($policy eq 'DROP') {
1815
1816         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1817
1818         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1819
1820         ruleset_addrule($ruleset, $chain, "-j DROP");
1821     } elsif ($policy eq 'REJECT') {
1822         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1823
1824         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1825
1826         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1827     } else {
1828         # should not happen
1829         die "internal error: unknown policy '$policy'";
1830     }
1831 }
1832
1833 sub ruleset_chain_add_conn_filters {
1834     my ($ruleset, $chain, $accept) = @_;
1835
1836     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1837     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1838 }
1839
1840 sub ruleset_chain_add_input_filters {
1841     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1842
1843     if ($cluster_conf->{ipset}->{blacklist}){
1844         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1845             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1846             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1847             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1848         }
1849         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1850         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1851     }
1852
1853     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1854         if ($ipversion == 4) {
1855             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1856         }
1857     }
1858
1859     if ($options->{tcpflags}) {
1860         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1861     }
1862 }
1863
1864 sub ruleset_create_vm_chain {
1865     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1866
1867     ruleset_create_chain($ruleset, $chain);
1868     my $accept = generate_nfqueue($options);
1869
1870     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1871         if ($direction eq 'OUT') {
1872             ruleset_generate_rule($ruleset, $chain, $ipversion,
1873                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1874                                     proto => 'udp', sport => 68, dport => 67 });
1875         } else {
1876             ruleset_generate_rule($ruleset, $chain, $ipversion,
1877                                   { action => 'ACCEPT',
1878                                     proto => 'udp', sport => 67, dport => 68 });
1879         }
1880     }
1881
1882     if ($direction eq 'OUT') {
1883         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1884             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1885         }
1886         if ($ipfilter_ipset) {
1887             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1888         }
1889         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1890     }
1891 }
1892
1893 sub ruleset_add_group_rule {
1894     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1895
1896     my $group = $rule->{action};
1897     my $group_chain = "GROUP-$group-$direction";
1898     if(!ruleset_chain_exist($ruleset, $group_chain)){
1899         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1900     }
1901
1902     if ($direction eq 'OUT' && $rule->{iface_out}) {
1903         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1904     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1905         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1906     } else {
1907         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1908     }
1909
1910     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1911 }
1912
1913 sub ruleset_generate_vm_rules {
1914     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1915
1916     my $lc_direction = lc($direction);
1917
1918     my $in_accept = generate_nfqueue($options);
1919
1920     foreach my $rule (@$rules) {
1921         next if $rule->{iface} && $rule->{iface} ne $netid;
1922         next if !$rule->{enable} || $rule->{errors};
1923         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1924
1925         if ($rule->{type} eq 'group') {
1926             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1927                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1928         } else {
1929             next if $rule->{type} ne $lc_direction;
1930             eval {
1931                 if ($direction eq 'OUT') {
1932                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1933                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1934                                           undef, $cluster_conf, $vmfw_conf);
1935                 } else {
1936                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1937                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1938                                           undef, $cluster_conf, $vmfw_conf);
1939                 }
1940             };
1941             warn $@ if $@;
1942         }
1943     }
1944 }
1945
1946 sub generate_nfqueue {
1947     my ($options) = @_;
1948
1949     if ($options->{ips}) {
1950         my $action = "NFQUEUE";
1951         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1952             if (defined($3) && defined($1)) {
1953                 $action .= " --queue-balance $1:$3";
1954             } elsif (defined($1)) {
1955                 $action .= " --queue-num $1";
1956             }
1957         }
1958         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1959         return $action;
1960     } else {
1961         return "ACCEPT";
1962     }
1963 }
1964
1965 sub ruleset_generate_vm_ipsrules {
1966     my ($ruleset, $options, $direction, $iface) = @_;
1967
1968     if ($options->{ips} && $direction eq 'IN') {
1969         my $nfqueue = generate_nfqueue($options);
1970
1971         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1972             ruleset_create_chain($ruleset, "PVEFW-IPS");
1973         }
1974
1975         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1976     }
1977 }
1978
1979 sub generate_venet_rules_direction {
1980     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1981
1982     my $lc_direction = lc($direction);
1983
1984     my $rules = $vmfw_conf->{rules};
1985
1986     my $options = $vmfw_conf->{options};
1987     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1988
1989     my $chain = "venet0-$vmid-$direction";
1990
1991     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
1992
1993     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1994
1995     # implement policy
1996     my $policy;
1997
1998     if ($direction eq 'OUT') {
1999         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2000     } else {
2001         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2002     }
2003
2004     my $accept = generate_nfqueue($options);
2005     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2006     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2007
2008     if ($direction eq 'OUT') {
2009         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2010             action => $chain,
2011             source => $ip,
2012             iface_in => 'venet0'});
2013     } else {
2014         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2015             action => $chain,
2016             dest => $ip,
2017             iface_out => 'venet0'});
2018     }
2019 }
2020
2021 sub generate_tap_rules_direction {
2022     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2023
2024     my $lc_direction = lc($direction);
2025
2026     my $rules = $vmfw_conf->{rules};
2027
2028     my $options = $vmfw_conf->{options};
2029     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2030
2031     my $tapchain = "$iface-$direction";
2032
2033     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2034     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2035         if $vmfw_conf->{ipset}->{$ipfilter_name};
2036
2037     # create chain with mac and ip filter
2038     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2039
2040     if ($options->{enable}) {
2041         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2042
2043         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2044
2045         # implement policy
2046         my $policy;
2047
2048         if ($direction eq 'OUT') {
2049             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2050         } else {
2051         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2052         }
2053
2054         my $accept = generate_nfqueue($options);
2055         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2056         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2057     } else {
2058         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2059         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2060     }
2061
2062     # plug the tap chain to bridge chain
2063     if ($direction eq 'IN') {
2064         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2065                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2066     } else {
2067         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2068                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2069     }
2070 }
2071
2072 sub enable_host_firewall {
2073     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2074
2075     my $options = $hostfw_conf->{options};
2076     my $cluster_options = $cluster_conf->{options};
2077     my $rules = $hostfw_conf->{rules};
2078     my $cluster_rules = $cluster_conf->{rules};
2079
2080     # host inbound firewall
2081     my $chain = "PVEFW-HOST-IN";
2082     ruleset_create_chain($ruleset, $chain);
2083
2084     my $loglevel = get_option_log_level($options, "log_level_in");
2085
2086     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2087
2088     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2089     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2090
2091     # we use RETURN because we need to check also tap rules
2092     my $accept_action = 'RETURN';
2093
2094     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2095
2096     # add host rules first, so that cluster wide rules can be overwritten
2097     foreach my $rule (@$rules, @$cluster_rules) {
2098         next if !$rule->{enable} || $rule->{errors};
2099         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2100
2101         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2102
2103         eval {
2104             if ($rule->{type} eq 'group') {
2105                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2106             } elsif ($rule->{type} eq 'in') {
2107                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2108                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2109                                       undef, $cluster_conf, $hostfw_conf);
2110             }
2111         };
2112         warn $@ if $@;
2113         delete $rule->{iface_in};
2114     }
2115
2116     # allow standard traffic for management ipset (includes cluster network)
2117     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2118     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2119     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2120     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2121     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2122     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2123
2124     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2125     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2126
2127     # corosync
2128     if ($localnet && ($ipversion == $localnet_ver)) {
2129         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2130         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2131         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2132     }
2133
2134     # implement input policy
2135     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2136     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2137
2138     # host outbound firewall
2139     $chain = "PVEFW-HOST-OUT";
2140     ruleset_create_chain($ruleset, $chain);
2141
2142     $loglevel = get_option_log_level($options, "log_level_out");
2143
2144     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2145
2146     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2147
2148     # we use RETURN because we may want to check other thigs later
2149     $accept_action = 'RETURN';
2150
2151     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2152
2153     # add host rules first, so that cluster wide rules can be overwritten
2154     foreach my $rule (@$rules, @$cluster_rules) {
2155         next if !$rule->{enable} || $rule->{errors};
2156         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2157
2158         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2159         eval {
2160             if ($rule->{type} eq 'group') {
2161                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2162             } elsif ($rule->{type} eq 'out') {
2163                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2164                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2165                                       undef, $cluster_conf, $hostfw_conf);
2166             }
2167         };
2168         warn $@ if $@;
2169         delete $rule->{iface_out};
2170     }
2171
2172     # allow standard traffic on cluster network
2173     if ($localnet && ($ipversion == $localnet_ver)) {
2174         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2175         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2176         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2177         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2178
2179         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2180         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2181         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2182     }
2183
2184     # implement output policy
2185     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2186     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2187
2188     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2189     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2190 }
2191
2192 sub generate_group_rules {
2193     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2194
2195     my $rules = $cluster_conf->{groups}->{$group};
2196
2197     if (!$rules) {
2198         warn "no such security group '$group'\n";
2199         $rules = []; # create empty chain
2200     }
2201
2202     my $chain = "GROUP-${group}-IN";
2203
2204     ruleset_create_chain($ruleset, $chain);
2205     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2206
2207     foreach my $rule (@$rules) {
2208         next if $rule->{type} ne 'in';
2209         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2210         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2211                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2212                               undef, $cluster_conf);
2213     }
2214
2215     $chain = "GROUP-${group}-OUT";
2216
2217     ruleset_create_chain($ruleset, $chain);
2218     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2219
2220     foreach my $rule (@$rules) {
2221         next if $rule->{type} ne 'out';
2222         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2223         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2224         # check also other tap rules later
2225         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2226                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2227                               undef, $cluster_conf);
2228     }
2229 }
2230
2231 my $MAX_NETS = 32;
2232 my $valid_netdev_names = {};
2233 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2234     $valid_netdev_names->{"net$i"} = 1;
2235 }
2236
2237 sub parse_fw_rule {
2238     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2239
2240     my $orig_line = $line;
2241
2242     my $rule = {};
2243
2244     # we can add single line comments to the end of the rule
2245     if ($line =~ s/#\s*(.*?)\s*$//) {
2246         $rule->{comment} = decode('utf8', $1);
2247     }
2248
2249     # we can disable a rule when prefixed with '|'
2250
2251     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2252
2253     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2254         die "unable to parse rule: $line\n";
2255
2256     $rule->{type} = lc($1);
2257     $rule->{action} = $2;
2258
2259     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2260         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2261             $rule->{macro} = $1;
2262             $rule->{action} = $2;
2263         }
2264     }
2265
2266     while (length($line)) {
2267         if ($line =~ s/^-i (\S+)\s*//) {
2268             $rule->{iface} = $1;
2269             next;
2270         }
2271
2272         last if $rule->{type} eq 'group';
2273
2274         if ($line =~ s/^-p (\S+)\s*//) {
2275             $rule->{proto} = $1;
2276             next;
2277         }
2278
2279         if ($line =~ s/^-dport (\S+)\s*//) {
2280             $rule->{dport} = $1;
2281             next;
2282         }
2283
2284         if ($line =~ s/^-sport (\S+)\s*//) {
2285             $rule->{sport} = $1;
2286             next;
2287         }
2288         if ($line =~ s/^-source (\S+)\s*//) {
2289             $rule->{source} = $1;
2290             next;
2291         }
2292         if ($line =~ s/^-dest (\S+)\s*//) {
2293             $rule->{dest} = $1;
2294             next;
2295         }
2296
2297         last;
2298     }
2299
2300     die "unable to parse rule parameters: $line\n" if length($line);
2301
2302     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2303     if ($verbose && $rule->{errors}) {
2304         warn "$prefix - errors in rule parameters: $orig_line\n";
2305         foreach my $p (keys %{$rule->{errors}}) {
2306             warn "  $p: $rule->{errors}->{$p}\n";
2307         }
2308     }
2309
2310     return $rule;
2311 }
2312
2313 sub parse_vmfw_option {
2314     my ($line) = @_;
2315
2316     my ($opt, $value);
2317
2318     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2319
2320     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2321         $opt = lc($1);
2322         $value = int($2);
2323     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2324         $opt = lc($1);
2325         $value = $2 ? lc($3) : '';
2326     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2327         $opt = lc($1);
2328         $value = uc($3);
2329     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2330         $opt = lc($1);
2331         $value = $2;
2332     } else {
2333         die "can't parse option '$line'\n"
2334     }
2335
2336     return ($opt, $value);
2337 }
2338
2339 sub parse_hostfw_option {
2340     my ($line) = @_;
2341
2342     my ($opt, $value);
2343
2344     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2345
2346     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2347         $opt = lc($1);
2348         $value = int($2);
2349     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2350         $opt = lc($1);
2351         $value = $2 ? lc($3) : '';
2352     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2353         $opt = lc($1);
2354         $value = int($2);
2355     } else {
2356         die "can't parse option '$line'\n"
2357     }
2358
2359     return ($opt, $value);
2360 }
2361
2362 sub parse_clusterfw_option {
2363     my ($line) = @_;
2364
2365     my ($opt, $value);
2366
2367     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2368         $opt = lc($1);
2369         $value = int($2);
2370         if (($value > 1) && ((time() - $value) > 60)) {
2371             $value = 0
2372         }
2373     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2374         $opt = lc($1);
2375         $value = uc($3);
2376     } else {
2377         die "can't parse option '$line'\n"
2378     }
2379
2380     return ($opt, $value);
2381 }
2382
2383 sub resolve_alias {
2384     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2385
2386     my $alias = lc($cidr);
2387     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2388     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2389
2390     die "no such alias '$cidr'\n" if !$e;;
2391
2392     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2393 }
2394
2395 sub parse_ip_or_cidr {
2396     my ($cidr) = @_;
2397
2398     my $ipversion;
2399
2400     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2401         $cidr =~ s|/128$||;
2402         $ipversion = 6;
2403     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2404         $cidr =~ s|/32$||;
2405         $ipversion = 4;
2406     } else {
2407         die "value does not look like a valid IP address or CIDR network\n";
2408     }
2409
2410     return wantarray ? ($cidr, $ipversion) : $cidr;
2411 }
2412
2413 sub parse_alias {
2414     my ($line) = @_;
2415
2416     # we can add single line comments to the end of the line
2417     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2418
2419     if ($line =~ m/^(\S+)\s(\S+)$/) {
2420         my ($name, $cidr) = ($1, $2);
2421         my $ipversion;
2422
2423         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2424
2425         my $data = {
2426             name => $name,
2427             cidr => $cidr,
2428             ipversion => $ipversion,
2429         };
2430         $data->{comment} = $comment  if $comment;
2431         return $data;
2432     }
2433
2434     return undef;
2435 }
2436
2437 sub generic_fw_config_parser {
2438     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2439
2440     my $section;
2441     my $group;
2442
2443     my $res = $empty_conf;
2444
2445     while (defined(my $line = <$fh>)) {
2446         next if $line =~ m/^#/;
2447         next if $line =~ m/^\s*$/;
2448
2449         chomp $line;
2450
2451         my $linenr = $fh->input_line_number();
2452         my $prefix = "$filename (line $linenr)";
2453
2454         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2455             $section = 'options';
2456             next;
2457         }
2458
2459         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2460             $section = 'aliases';
2461             next;
2462         }
2463
2464         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2465             $section = 'groups';
2466             $group = lc($1);
2467             my $comment = $2;
2468             eval {
2469                 die "security group name too long\n" if length($group) > $max_group_name_length;
2470                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2471             };
2472             if (my $err = $@) {
2473                 ($section, $group, $comment) = undef;
2474                 warn "$prefix: $err";
2475                 next;
2476             }
2477
2478             $res->{$section}->{$group} = [];
2479             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2480                 if $comment;
2481             next;
2482         }
2483
2484         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2485             $section = 'rules';
2486             next;
2487         }
2488
2489         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2490             $section = 'ipset';
2491             $group = lc($1);
2492             my $comment = $2;
2493             eval {
2494                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2495                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2496             };
2497             if (my $err = $@) {
2498                 ($section, $group, $comment) = undef;
2499                 warn "$prefix: $err";
2500                 next;
2501             }
2502
2503             $res->{$section}->{$group} = [];
2504             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2505                 if $comment;
2506             next;
2507         }
2508
2509         if (!$section) {
2510             warn "$prefix: skip line - no section\n";
2511             next;
2512         }
2513
2514         if ($section eq 'options') {
2515             eval {
2516                 my ($opt, $value);
2517                 if ($rule_env eq 'cluster') {
2518                     ($opt, $value) = parse_clusterfw_option($line);
2519                 } elsif ($rule_env eq 'host') {
2520                     ($opt, $value) = parse_hostfw_option($line);
2521                 } else {
2522                     ($opt, $value) = parse_vmfw_option($line);
2523                 }
2524                 $res->{options}->{$opt} = $value;
2525             };
2526             warn "$prefix: $@" if $@;
2527         } elsif ($section eq 'aliases') {
2528             eval {
2529                 my $data = parse_alias($line);
2530                 $res->{aliases}->{lc($data->{name})} = $data;
2531             };
2532             warn "$prefix: $@" if $@;
2533         } elsif ($section eq 'rules') {
2534             my $rule;
2535             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2536             if (my $err = $@) {
2537                 warn "$prefix: $err";
2538                 next;
2539             }
2540             push @{$res->{$section}}, $rule;
2541         } elsif ($section eq 'groups') {
2542             my $rule;
2543             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2544             if (my $err = $@) {
2545                 warn "$prefix: $err";
2546                 next;
2547             }
2548             push @{$res->{$section}->{$group}}, $rule;
2549         } elsif ($section eq 'ipset') {
2550             # we can add single line comments to the end of the rule
2551             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2552
2553             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2554             my $nomatch = $1;
2555             my $cidr = $2;
2556             my $errors;
2557
2558             if ($nomatch && !$feature_ipset_nomatch) {
2559                 $errors->{nomatch} = "nomatch not supported by kernel";
2560             }
2561
2562             eval {
2563                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2564                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2565                 } else {
2566                     $cidr = parse_ip_or_cidr($cidr);
2567                 }
2568             };
2569             if (my $err = $@) {
2570                 chomp $err;
2571                 $errors->{cidr} = $err;
2572             }
2573
2574             my $entry = { cidr => $cidr };
2575             $entry->{nomatch} = 1 if $nomatch;
2576             $entry->{comment} = $comment if $comment;
2577             $entry->{errors} =  $errors if $errors;
2578
2579             if ($verbose && $errors) {
2580                 warn "$prefix - errors in ipset '$group': $line\n";
2581                 foreach my $p (keys %{$errors}) {
2582                     warn "  $p: $errors->{$p}\n";
2583                 }
2584             }
2585
2586             push @{$res->{$section}->{$group}}, $entry;
2587         } else {
2588             warn "$prefix: skip line - unknown section\n";
2589             next;
2590         }
2591     }
2592
2593     return $res;
2594 }
2595
2596 sub parse_hostfw_config {
2597     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2598
2599     my $empty_conf = { rules => [], options => {}};
2600
2601     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2602 }
2603
2604 sub parse_vmfw_config {
2605     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2606
2607     my $empty_conf = {
2608         rules => [],
2609         options => {},
2610         aliases => {},
2611         ipset => {} ,
2612         ipset_comments => {},
2613     };
2614
2615     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2616 }
2617
2618 sub parse_clusterfw_config {
2619     my ($filename, $fh, $verbose) = @_;
2620
2621     my $section;
2622     my $group;
2623
2624     my $empty_conf = {
2625         rules => [],
2626         options => {},
2627         aliases => {},
2628         groups => {},
2629         group_comments => {},
2630         ipset => {} ,
2631         ipset_comments => {},
2632     };
2633
2634     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2635 }
2636
2637 sub run_locked {
2638     my ($code, @param) = @_;
2639
2640     my $timeout = 10;
2641
2642     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2643
2644     die $@ if $@;
2645
2646     return $res;
2647 }
2648
2649 sub read_local_vm_config {
2650
2651     my $openvz = {};
2652     my $qemu = {};
2653
2654     my $vmdata = { openvz => $openvz, qemu => $qemu };
2655
2656     my $vmlist = PVE::Cluster::get_vmlist();
2657     return $vmdata if !$vmlist || !$vmlist->{ids};
2658     my $ids = $vmlist->{ids};
2659
2660     foreach my $vmid (keys %$ids) {
2661         next if !$vmid; # skip VE0
2662         my $d = $ids->{$vmid};
2663         next if !$d->{node} || $d->{node} ne $nodename;
2664         next if !$d->{type};
2665         if ($d->{type} eq 'openvz') {
2666             if ($have_pve_manager) {
2667                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2668                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2669                     $openvz->{$vmid} = $conf;
2670                 }
2671             }
2672         } elsif ($d->{type} eq 'qemu') {
2673             if ($have_qemu_server) {
2674                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2675                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2676                     $qemu->{$vmid} = $conf;
2677                 }
2678             }
2679         }
2680     }
2681
2682     return $vmdata;
2683 };
2684
2685 sub load_vmfw_conf {
2686     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2687
2688     my $vmfw_conf = {};
2689
2690     $dir = $pvefw_conf_dir if !defined($dir);
2691
2692     my $filename = "$dir/$vmid.fw";
2693     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2694         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2695         $vmfw_conf->{vmid} = $vmid;
2696     }
2697
2698     return $vmfw_conf;
2699 }
2700
2701 my $format_rules = sub {
2702     my ($rules, $allow_iface) = @_;
2703
2704     my $raw = '';
2705
2706     foreach my $rule (@$rules) {
2707         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2708             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2709             $raw .= uc($rule->{type});
2710             if ($rule->{macro}) {
2711                 $raw .= " $rule->{macro}($rule->{action})";
2712             } else {
2713                 $raw .= " " . $rule->{action};
2714             }
2715             if ($allow_iface && $rule->{iface}) {
2716                 $raw .= " -i $rule->{iface}";
2717             }
2718
2719             if ($rule->{type} ne  'group')  {
2720                 $raw .= " -source $rule->{source}" if $rule->{source};
2721                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2722                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2723                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2724                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2725             }
2726
2727             $raw .= " # " . encode('utf8', $rule->{comment})
2728                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2729             $raw .= "\n";
2730         } else {
2731             die "unknown rule type '$rule->{type}'";
2732         }
2733     }
2734
2735     return $raw;
2736 };
2737
2738 my $format_options = sub {
2739     my ($options) = @_;
2740
2741     my $raw = '';
2742
2743     $raw .= "[OPTIONS]\n\n";
2744     foreach my $opt (keys %$options) {
2745         $raw .= "$opt: $options->{$opt}\n";
2746     }
2747     $raw .= "\n";
2748
2749     return $raw;
2750 };
2751
2752 my $format_aliases = sub {
2753     my ($aliases) = @_;
2754
2755     my $raw = '';
2756
2757     $raw .= "[ALIASES]\n\n";
2758     foreach my $k (keys %$aliases) {
2759         my $e = $aliases->{$k};
2760         $raw .= "$e->{name} $e->{cidr}";
2761         $raw .= " # " . encode('utf8', $e->{comment})
2762             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2763         $raw .= "\n";
2764     }
2765     $raw .= "\n";
2766
2767     return $raw;
2768 };
2769
2770 my $format_ipsets = sub {
2771     my ($fw_conf) = @_;
2772
2773     my $raw = '';
2774
2775     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2776         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2777             my $utf8comment = encode('utf8', $comment);
2778             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2779         } else {
2780             $raw .= "[IPSET $ipset]\n\n";
2781         }
2782         my $options = $fw_conf->{ipset}->{$ipset};
2783
2784         my $nethash = {};
2785         foreach my $entry (@$options) {
2786             $nethash->{$entry->{cidr}} = $entry;
2787         }
2788
2789         foreach my $cidr (sort keys %$nethash) {
2790             my $entry = $nethash->{$cidr};
2791             my $line = $entry->{nomatch} ? '!' : '';
2792             $line .= $entry->{cidr};
2793             $line .= " # " . encode('utf8', $entry->{comment})
2794                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2795             $raw .= "$line\n";
2796         }
2797
2798         $raw .= "\n";
2799     }
2800
2801     return $raw;
2802 };
2803
2804 sub save_vmfw_conf {
2805     my ($vmid, $vmfw_conf) = @_;
2806
2807     my $raw = '';
2808
2809     my $options = $vmfw_conf->{options};
2810     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2811
2812     my $aliases = $vmfw_conf->{aliases};
2813     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2814
2815     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2816
2817     my $rules = $vmfw_conf->{rules} || [];
2818     if ($rules && scalar(@$rules)) {
2819         $raw .= "[RULES]\n\n";
2820         $raw .= &$format_rules($rules, 1);
2821         $raw .= "\n";
2822     }
2823
2824     mkdir $pvefw_conf_dir;
2825
2826     my $filename = "$pvefw_conf_dir/$vmid.fw";
2827     PVE::Tools::file_set_contents($filename, $raw);
2828 }
2829
2830 sub read_vm_firewall_configs {
2831     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2832
2833     my $vmfw_configs = {};
2834
2835     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2836         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2837         next if !$vmfw_conf->{options}; # skip if file does not exists
2838         $vmfw_configs->{$vmid} = $vmfw_conf;
2839     }
2840     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2841         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2842         next if !$vmfw_conf->{options}; # skip if file does not exists
2843         $vmfw_configs->{$vmid} = $vmfw_conf;
2844     }
2845
2846     return $vmfw_configs;
2847 }
2848
2849 sub get_option_log_level {
2850     my ($options, $k) = @_;
2851
2852     my $v = $options->{$k};
2853     $v = $default_log_level if !defined($v);
2854
2855     return undef if $v eq '' || $v eq 'nolog';
2856
2857     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2858
2859     return $v if ($v >= 0) && ($v <= 7);
2860
2861     warn "unknown log level ($k = '$v')\n";
2862
2863     return undef;
2864 }
2865
2866 sub generate_std_chains {
2867     my ($ruleset, $options, $ipversion) = @_;
2868
2869     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2870
2871     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2872
2873     my $chain;
2874
2875     if ($ipversion == 4) {
2876         # same as shorewall smurflog.
2877         $chain = 'PVEFW-smurflog';
2878         $std_chains->{$chain} = [];
2879
2880         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2881         push @{$std_chains->{$chain}}, "-j DROP";
2882     }
2883
2884     # same as shorewall logflags action.
2885     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2886     $chain = 'PVEFW-logflags';
2887     $std_chains->{$chain} = [];
2888
2889     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2890     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2891     push @{$std_chains->{$chain}}, "-j DROP";
2892
2893     foreach my $chain (keys %$std_chains) {
2894         ruleset_create_chain($ruleset, $chain);
2895         foreach my $rule (@{$std_chains->{$chain}}) {
2896             if (ref($rule)) {
2897                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2898             } else {
2899                 ruleset_addrule($ruleset, $chain, $rule);
2900             }
2901         }
2902     }
2903 }
2904
2905 sub generate_ipset_chains {
2906     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2907
2908     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2909
2910         my $options = $fw_conf->{ipset}->{$ipset};
2911
2912         # remove duplicates
2913         my $nethash = {};
2914         foreach my $entry (@$options) {
2915             next if $entry->{errors}; # skip entries with errors
2916             eval {
2917                 my ($cidr, $ver);
2918                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2919                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2920                 } else {
2921                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2922                 }
2923                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2924                 if ($ver == 6) {
2925                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2926                     $cidr = inet_ntop(AF_INET6, $ipv6);
2927                     $cidr =~ s|/128$||;
2928                 } else {
2929                     $cidr =~ s|/32$||;
2930                 }
2931
2932                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2933             };
2934             warn $@ if $@;
2935         }
2936
2937         foreach my $ipversion (4, 6) {
2938             my $data = $nethash->{$ipversion};
2939
2940             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2941
2942             my $hashsize = scalar(@$options);
2943             if ($hashsize <= 64) {
2944                 $hashsize = 64;
2945             } else {
2946                 $hashsize = round_powerof2($hashsize);
2947             }
2948
2949             my $family = $ipversion == "6" ? "inet6" : "inet";
2950
2951             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2952
2953             foreach my $cidr (sort keys %$data) {
2954                 my $entry = $data->{$cidr};
2955
2956                 my $cmd = "add $name $cidr";
2957                 if ($entry->{nomatch}) {
2958                     if ($feature_ipset_nomatch) {
2959                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2960                     } else {
2961                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2962                     }
2963                 } else {
2964                     push @{$ipset_ruleset->{$name}}, $cmd;
2965                 }
2966             }
2967         }
2968     }
2969 }
2970
2971 sub round_powerof2 {
2972     my ($int) = @_;
2973
2974     $int--;
2975     $int |= $int >> $_ foreach (1,2,4,8,16);
2976     return ++$int;
2977 }
2978
2979 sub load_clusterfw_conf {
2980     my ($filename, $verbose) = @_;
2981
2982     $filename = $clusterfw_conf_filename if !defined($filename);
2983
2984     my $cluster_conf = {};
2985     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2986         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2987     }
2988
2989     return $cluster_conf;
2990 }
2991
2992 sub save_clusterfw_conf {
2993     my ($cluster_conf) = @_;
2994
2995     my $raw = '';
2996
2997     my $options = $cluster_conf->{options};
2998     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2999
3000     my $aliases = $cluster_conf->{aliases};
3001     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3002
3003     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3004
3005     my $rules = $cluster_conf->{rules};
3006     if ($rules && scalar(@$rules)) {
3007         $raw .= "[RULES]\n\n";
3008         $raw .= &$format_rules($rules, 1);
3009         $raw .= "\n";
3010     }
3011
3012     if ($cluster_conf->{groups}) {
3013         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3014             my $rules = $cluster_conf->{groups}->{$group};
3015             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3016                 my $utf8comment = encode('utf8', $comment);
3017                 $raw .= "[group $group] # $utf8comment\n\n";
3018             } else {
3019                 $raw .= "[group $group]\n\n";
3020             }
3021
3022             $raw .= &$format_rules($rules, 0);
3023             $raw .= "\n";
3024         }
3025     }
3026
3027     mkdir $pvefw_conf_dir;
3028     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3029 }
3030
3031 sub load_hostfw_conf {
3032     my ($cluster_conf, $filename, $verbose) = @_;
3033
3034     $filename = $hostfw_conf_filename if !defined($filename);
3035
3036     my $hostfw_conf = {};
3037     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3038         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3039     }
3040     return $hostfw_conf;
3041 }
3042
3043 sub save_hostfw_conf {
3044     my ($hostfw_conf) = @_;
3045
3046     my $raw = '';
3047
3048     my $options = $hostfw_conf->{options};
3049     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3050
3051     my $rules = $hostfw_conf->{rules};
3052     if ($rules && scalar(@$rules)) {
3053         $raw .= "[RULES]\n\n";
3054         $raw .= &$format_rules($rules, 1);
3055         $raw .= "\n";
3056     }
3057
3058     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3059 }
3060
3061 sub compile {
3062     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3063
3064     my $vmfw_configs;
3065
3066     if ($vmdata) { # test mode
3067         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3068         my $filename = "$testdir/cluster.fw";
3069         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3070
3071         $filename = "$testdir/host.fw";
3072         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3073
3074         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3075     } else { # normal operation
3076         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3077
3078         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3079
3080         $vmdata = read_local_vm_config();
3081         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3082     }
3083
3084     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3085     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3086
3087     return ($ruleset, $ipset_ruleset, $rulesetv6);
3088 }
3089
3090 sub compile_iptables_filter {
3091     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3092
3093     $cluster_conf->{ipset}->{venet0} = [];
3094     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3095
3096     my $localnet;
3097     if ($cluster_conf->{aliases}->{local_network}) {
3098         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3099     } else {
3100         my $localnet_ver;
3101         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3102
3103         $cluster_conf->{aliases}->{local_network} = {
3104             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3105     }
3106
3107     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3108
3109     return ({}, {}) if !$cluster_conf->{options}->{enable};
3110
3111     my $ruleset = {};
3112
3113     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3114     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3115
3116     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3117
3118     my $hostfw_options = $hostfw_conf->{options} || {};
3119
3120     # fixme: what log level should we use here?
3121     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3122
3123     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3124
3125
3126     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3127     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3128     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3129
3130     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3131     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3132
3133     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3134
3135     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3136     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3137
3138     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3139     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3140
3141     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3142
3143     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3144
3145     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3146
3147     my $ipset_ruleset = {};
3148
3149     if ($hostfw_enable) {
3150         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3151         warn $@ if $@; # just to be sure - should not happen
3152     }
3153
3154     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3155
3156     # generate firewall rules for QEMU VMs
3157     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3158         eval {
3159             my $conf = $vmdata->{qemu}->{$vmid};
3160             my $vmfw_conf = $vmfw_configs->{$vmid};
3161             return if !$vmfw_conf;
3162
3163             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3164
3165             foreach my $netid (keys %$conf) {
3166                 next if $netid !~ m/^net(\d+)$/;
3167                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3168                 next if !$net->{firewall};
3169                 my $iface = "tap${vmid}i$1";
3170
3171                 my $macaddr = $net->{macaddr};
3172                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3173                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3174                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3175                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3176             }
3177         };
3178         warn $@ if $@; # just to be sure - should not happen
3179     }
3180
3181     # generate firewall rules for OpenVZ containers
3182     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3183         eval {
3184             my $conf = $vmdata->{openvz}->{$vmid};
3185
3186             my $vmfw_conf = $vmfw_configs->{$vmid};
3187             return if !$vmfw_conf;
3188
3189             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3190
3191             if ($vmfw_conf->{options}->{enable}) {
3192                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3193                     my $ip = $conf->{ip_address}->{value};
3194                     $ip =~ s/\s+/,/g;
3195
3196                     my @ips = ();
3197
3198                     foreach my $singleip (split(',', $ip)) {
3199                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3200                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3201                         push @ips, $singleip if $singleip_ver == $ipversion;
3202                     }
3203
3204                     if (scalar(@ips)) {
3205                         my $ip_list = join(',', @ips);
3206                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3207                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3208                     }
3209                 }
3210             }
3211
3212             if ($conf->{netif} && $conf->{netif}->{value}) {
3213                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3214                 foreach my $netid (keys %$netif) {
3215                     my $d = $netif->{$netid};
3216                     my $bridge = $d->{bridge};
3217                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3218                     my $macaddr = $d->{mac};
3219                     my $iface = $d->{host_ifname};
3220                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3221                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3222                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3223                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3224                 }
3225             }
3226         };
3227         warn $@ if $@; # just to be sure - should not happen
3228     }
3229
3230     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3231         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3232     }
3233
3234     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3235
3236     return ($ruleset, $ipset_ruleset);
3237 }
3238
3239 sub get_ruleset_status {
3240     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3241
3242     my $statushash = {};
3243
3244     foreach my $chain (sort keys %$ruleset) {
3245         my $sig = &$digest_fn($ruleset->{$chain});
3246
3247         $statushash->{$chain}->{sig} = $sig;
3248
3249         my $oldsig = $active_chains->{$chain};
3250         if (!defined($oldsig)) {
3251             $statushash->{$chain}->{action} = 'create';
3252         } else {
3253             if ($oldsig eq $sig) {
3254                 $statushash->{$chain}->{action} = 'exists';
3255             } else {
3256                 $statushash->{$chain}->{action} = 'update';
3257             }
3258         }
3259         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3260         foreach my $cmd (@{$ruleset->{$chain}}) {
3261             print "\t$cmd\n" if $verbose;
3262         }
3263     }
3264
3265     foreach my $chain (sort keys %$active_chains) {
3266         if (!defined($ruleset->{$chain})) {
3267             my $sig = $active_chains->{$chain};
3268             $statushash->{$chain}->{action} = 'delete';
3269             $statushash->{$chain}->{sig} = $sig;
3270             print "delete $chain ($sig)\n" if $verbose;
3271         }
3272     }
3273
3274     return $statushash;
3275 }
3276
3277 sub print_sig_rule {
3278     my ($chain, $sig) = @_;
3279
3280     # We just use this to store a SHA1 checksum used to detect changes
3281     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3282 }
3283
3284 sub get_ruleset_cmdlist {
3285     my ($ruleset, $verbose, $iptablescmd) = @_;
3286
3287     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3288
3289     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3290     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3291
3292     # create missing chains first
3293     foreach my $chain (sort keys %$ruleset) {
3294         my $stat = $statushash->{$chain};
3295         die "internal error" if !$stat;
3296         next if $stat->{action} ne 'create';
3297
3298         $cmdlist .= ":$chain - [0:0]\n";
3299     }
3300
3301     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3302         my $chain = "PVEFW-$h";
3303         if ($ruleset->{$chain} && !$hooks->{$h}) {
3304             $cmdlist .= "-A $h -j $chain\n";
3305         }
3306     }
3307
3308     foreach my $chain (sort keys %$ruleset) {
3309         my $stat = $statushash->{$chain};
3310         die "internal error" if !$stat;
3311
3312         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3313             $cmdlist .= "-F $chain\n";
3314             foreach my $cmd (@{$ruleset->{$chain}}) {
3315                 $cmdlist .= "$cmd\n";
3316             }
3317             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3318         } elsif ($stat->{action} eq 'delete') {
3319             die "internal error"; # this should not happen
3320         } elsif ($stat->{action} eq 'exists') {
3321             # do nothing
3322         } else {
3323             die "internal error - unknown status '$stat->{action}'";
3324         }
3325     }
3326
3327     foreach my $chain (keys %$statushash) {
3328         next if $statushash->{$chain}->{action} ne 'delete';
3329         $cmdlist .= "-F $chain\n";
3330     }
3331     foreach my $chain (keys %$statushash) {
3332         next if $statushash->{$chain}->{action} ne 'delete';
3333         next if $chain eq 'PVEFW-INPUT';
3334         next if $chain eq 'PVEFW-OUTPUT';
3335         next if $chain eq 'PVEFW-FORWARD';
3336         $cmdlist .= "-X $chain\n";
3337     }
3338
3339     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3340
3341     $cmdlist .= "COMMIT\n";
3342
3343     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3344 }
3345
3346 sub get_ipset_cmdlist {
3347     my ($ruleset, $verbose) = @_;
3348
3349     my $cmdlist = "";
3350
3351     my $delete_cmdlist = "";
3352
3353     my $active_chains = ipset_get_chains();
3354     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3355
3356     # remove stale _swap chains
3357     foreach my $chain (keys %$active_chains) {
3358         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3359             $cmdlist .= "destroy $chain\n";
3360         }
3361     }
3362
3363     foreach my $chain (keys %$ruleset) {
3364         my $stat = $statushash->{$chain};
3365         die "internal error" if !$stat;
3366
3367         if ($stat->{action} eq 'create') {
3368             foreach my $cmd (@{$ruleset->{$chain}}) {
3369                 $cmdlist .= "$cmd\n";
3370             }
3371         }
3372     }
3373
3374     foreach my $chain (keys %$ruleset) {
3375         my $stat = $statushash->{$chain};
3376         die "internal error" if !$stat;
3377
3378         if ($stat->{action} eq 'update') {
3379             my $chain_swap = $chain."_swap";
3380
3381             foreach my $cmd (@{$ruleset->{$chain}}) {
3382                 $cmd =~ s/$chain/$chain_swap/;
3383                 $cmdlist .= "$cmd\n";
3384             }
3385             $cmdlist .= "swap $chain_swap $chain\n";
3386             $cmdlist .= "flush $chain_swap\n";
3387             $cmdlist .= "destroy $chain_swap\n";
3388         }
3389     }
3390
3391      # the remove unused chains
3392     foreach my $chain (keys %$statushash) {
3393         next if $statushash->{$chain}->{action} ne 'delete';
3394
3395         $delete_cmdlist .= "flush $chain\n";
3396         $delete_cmdlist .= "destroy $chain\n";
3397     }
3398
3399     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3400
3401     return ($cmdlist, $delete_cmdlist, $changes);
3402 }
3403
3404 sub apply_ruleset {
3405     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3406
3407     enable_bridge_firewall();
3408
3409     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3410         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3411
3412     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3413     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3414
3415     if ($verbose) {
3416         if ($ipset_changes) {
3417             print "ipset changes:\n";
3418             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3419             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3420         }
3421
3422         if ($changes) {
3423             print "iptables changes:\n";
3424             print $cmdlist;
3425         }
3426
3427         if ($changesv6) {
3428             print "ip6tables changes:\n";
3429             print $cmdlistv6;
3430         }
3431     }
3432
3433     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3434     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3435
3436     ipset_restore_cmdlist($ipset_create_cmdlist);
3437
3438     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3439     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3440
3441     iptables_restore_cmdlist($cmdlist);
3442
3443     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3444     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3445
3446     ip6tables_restore_cmdlist($cmdlistv6);
3447
3448     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3449     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3450
3451     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3452
3453     # test: re-read status and check if everything is up to date
3454     my $active_chains = iptables_get_chains();
3455     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3456
3457     my $errors;
3458     foreach my $chain (sort keys %$ruleset) {
3459         my $stat = $statushash->{$chain};
3460         if ($stat->{action} ne 'exists') {
3461             warn "unable to update chain '$chain'\n";
3462             $errors = 1;
3463         }
3464     }
3465
3466     my $active_chainsv6 = iptables_get_chains("ip6tables");
3467     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3468
3469     foreach my $chain (sort keys %$rulesetv6) {
3470         my $stat = $statushashv6->{$chain};
3471         if ($stat->{action} ne 'exists') {
3472             warn "unable to update chain '$chain'\n";
3473             $errors = 1;
3474         }
3475     }
3476
3477     die "unable to apply firewall changes\n" if $errors;
3478
3479     update_nf_conntrack_max($hostfw_conf);
3480
3481     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3482
3483 }
3484
3485 sub update_nf_conntrack_max {
3486     my ($hostfw_conf) = @_;
3487
3488     my $max = 65536; # reasonable default
3489
3490     my $options = $hostfw_conf->{options} || {};
3491
3492     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3493         $max = $options->{nf_conntrack_max};
3494         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3495     }
3496
3497     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3498     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3499
3500     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3501
3502     if ($current != $max) {
3503         my $hashsize = int($max/4);
3504         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3505         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3506     }
3507 }
3508
3509 sub update_nf_conntrack_tcp_timeout_established {
3510     my ($hostfw_conf) = @_;
3511
3512     my $options = $hostfw_conf->{options} || {};
3513
3514     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3515
3516     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3517 }
3518
3519 sub remove_pvefw_chains {
3520
3521     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3522     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3523     PVE::Firewall::remove_pvefw_chains_ipset();
3524
3525 }
3526
3527 sub remove_pvefw_chains_iptables {
3528     my ($iptablescmd) = @_;
3529
3530     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3531     my $cmdlist = "*filter\n";
3532
3533     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3534         if ($hooks->{$h}) {
3535             $cmdlist .= "-D $h -j PVEFW-$h\n";
3536         }
3537     }
3538
3539     foreach my $chain (keys %$chash) {
3540         $cmdlist .= "-F $chain\n";
3541     }
3542
3543     foreach my $chain (keys %$chash) {
3544         $cmdlist .= "-X $chain\n";
3545     }
3546     $cmdlist .= "COMMIT\n";
3547
3548     if($iptablescmd eq "ip6tables") {
3549         ip6tables_restore_cmdlist($cmdlist);
3550     } else {
3551         iptables_restore_cmdlist($cmdlist);
3552     }
3553 }
3554
3555 sub remove_pvefw_chains_ipset {
3556
3557     my $ipset_chains = ipset_get_chains();
3558
3559     my $cmdlist = "";
3560
3561     foreach my $chain (keys %$ipset_chains) {
3562         $cmdlist .= "flush $chain\n";
3563         $cmdlist .= "destroy $chain\n";
3564     }
3565
3566     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3567 }
3568
3569 sub init {
3570     my $cluster_conf = load_clusterfw_conf();
3571     my $cluster_options = $cluster_conf->{options};
3572     my $enable = $cluster_options->{enable};
3573
3574     return if !$enable;
3575
3576     # load required modules here
3577 }
3578
3579 sub update {
3580     my $code = sub {
3581
3582         my $cluster_conf = load_clusterfw_conf();
3583         my $cluster_options = $cluster_conf->{options};
3584
3585         if (!$cluster_options->{enable}) {
3586             PVE::Firewall::remove_pvefw_chains();
3587             return;
3588         }
3589
3590         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3591
3592         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3593
3594         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3595     };
3596
3597     run_locked($code);
3598 }
3599
3600 1;