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 PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 my $max_alias_name_length = 64;
  78 my $max_ipset_name_length = 64;
  79
  80
  81 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  82     description => "Security Group name.",
  83     type => 'string',
  84     pattern => $security_group_name_pattern,
  85     minLength => 2,
  86     maxLength => 20,
  87 });
  88
  89 my $feature_ipset_nomatch = 0;
  90 eval  {
  91     my (undef, undef, $release) = POSIX::uname();
  92     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  93         my ($major, $minor) = ($1, $2);
  94         $feature_ipset_nomatch = 1 if ($major > 3) ||
  95             ($major == 3 && $minor >= 7);
  96     }
  97
  98 };
  99
 100 use Data::Dumper;
 101
 102 my $nodename = PVE::INotify::nodename();
 103
 104 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 105
 106 my $default_log_level = 'nolog'; # avoid logs by default
 107
 108 my $log_level_hash = {
 109     debug => 7,
 110     info => 6,
 111     notice => 5,
 112     warning => 4,
 113     err => 3,
 114     crit => 2,
 115     alert => 1,
 116     emerg => 0,
 117 };
 118
 119 # imported/converted from: /usr/share/shorewall/macro.*
 120 my $pve_fw_macros = {
 121     'Amanda' => [
 122         "Amanda Backup",
 123         { action => 'PARAM', proto => 'udp', dport => '10080' },
 124         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 125     ],
 126     'Auth' => [
 127         "Auth (identd) traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '113' },
 129     ],
 130     'BGP' => [
 131         "Border Gateway Protocol traffic",
 132         { action => 'PARAM', proto => 'tcp', dport => '179' },
 133     ],
 134     'BitTorrent' => [
 135         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 136         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 137         { action => 'PARAM', proto => 'udp', dport => '6881' },
 138     ],
 139     'BitTorrent32' => [
 140         "BitTorrent traffic for BitTorrent 3.2 and later",
 141         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 142         { action => 'PARAM', proto => 'udp', dport => '6881' },
 143     ],
 144     'CVS' => [
 145         "Concurrent Versions System pserver traffic",
 146         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 147     ],
 148     'Citrix' => [
 149         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 150         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 151         { action => 'PARAM', proto => 'udp', dport => '1604' },
 152         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 153     ],
 154     'DAAP' => [
 155         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 156         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 157         { action => 'PARAM', proto => 'udp', dport => '3689' },
 158     ],
 159     'DCC' => [
 160         "Distributed Checksum Clearinghouse spam filtering mechanism",
 161         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 162     ],
 163     'DHCPfwd' => [
 164         "Forwarded DHCP traffic",
 165         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 166     ],
 167     'DNS' => [
 168         "Domain Name System traffic (upd and tcp)",
 169         { action => 'PARAM', proto => 'udp', dport => '53' },
 170         { action => 'PARAM', proto => 'tcp', dport => '53' },
 171     ],
 172     'Distcc' => [
 173         "Distributed Compiler service",
 174         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 175     ],
 176     'FTP' => [
 177         "File Transfer Protocol",
 178         { action => 'PARAM', proto => 'tcp', dport => '21' },
 179     ],
 180     'Finger' => [
 181         "Finger protocol (RFC 742)",
 182         { action => 'PARAM', proto => 'tcp', dport => '79' },
 183     ],
 184     'GNUnet' => [
 185         "GNUnet secure peer-to-peer networking traffic",
 186         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 187         { action => 'PARAM', proto => 'udp', dport => '2086' },
 188         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 189         { action => 'PARAM', proto => 'udp', dport => '1080' },
 190     ],
 191     'GRE' => [
 192         "Generic Routing Encapsulation tunneling protocol",
 193         { action => 'PARAM', proto => '47' },
 194     ],
 195     'Git' => [
 196         "Git distributed revision control traffic",
 197         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 198     ],
 199     'HKP' => [
 200         "OpenPGP HTTP keyserver protocol traffic",
 201         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 202     ],
 203     'HTTP' => [
 204         "Hypertext Transfer Protocol (WWW)",
 205         { action => 'PARAM', proto => 'tcp', dport => '80' },
 206     ],
 207     'HTTPS' => [
 208         "Hypertext Transfer Protocol (WWW) over SSL",
 209         { action => 'PARAM', proto => 'tcp', dport => '443' },
 210     ],
 211     'ICPV2' => [
 212         "Internet Cache Protocol V2 (Squid) traffic",
 213         { action => 'PARAM', proto => 'udp', dport => '3130' },
 214     ],
 215     'ICQ' => [
 216         "AOL Instant Messenger traffic",
 217         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 218     ],
 219     'IMAP' => [
 220         "Internet Message Access Protocol",
 221         { action => 'PARAM', proto => 'tcp', dport => '143' },
 222     ],
 223     'IMAPS' => [
 224         "Internet Message Access Protocol over SSL",
 225         { action => 'PARAM', proto => 'tcp', dport => '993' },
 226     ],
 227     'IPIP' => [
 228         "IPIP capsulation traffic",
 229         { action => 'PARAM', proto => '94' },
 230     ],
 231     'IPsec' => [
 232         "IPsec traffic",
 233         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 234         { action => 'PARAM', proto => '50' },
 235     ],
 236     'IPsecah' => [
 237         "IPsec authentication (AH) traffic",
 238         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 239         { action => 'PARAM', proto => '51' },
 240     ],
 241     'IPsecnat' => [
 242         "IPsec traffic and Nat-Traversal",
 243         { action => 'PARAM', proto => 'udp', dport => '500' },
 244         { action => 'PARAM', proto => 'udp', dport => '4500' },
 245         { action => 'PARAM', proto => '50' },
 246     ],
 247     'IRC' => [
 248         "Internet Relay Chat traffic",
 249         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 250     ],
 251     'Jetdirect' => [
 252         "HP Jetdirect printing",
 253         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 254     ],
 255     'L2TP' => [
 256         "Layer 2 Tunneling Protocol traffic",
 257         { action => 'PARAM', proto => 'udp', dport => '1701' },
 258     ],
 259     'LDAP' => [
 260         "Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '389' },
 262     ],
 263     'LDAPS' => [
 264         "Secure Lightweight Directory Access Protocol traffic",
 265         { action => 'PARAM', proto => 'tcp', dport => '636' },
 266     ],
 267     'MSNP' => [
 268         "Microsoft Notification Protocol",
 269         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 270     ],
 271     'MSSQL' => [
 272         "Microsoft SQL Server",
 273         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 274     ],
 275     'Mail' => [
 276         "Mail traffic (SMTP, SMTPS, Submission)",
 277         { action => 'PARAM', proto => 'tcp', dport => '25' },
 278         { action => 'PARAM', proto => 'tcp', dport => '465' },
 279         { action => 'PARAM', proto => 'tcp', dport => '587' },
 280     ],
 281     'Munin' => [
 282         "Munin networked resource monitoring traffic",
 283         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 284     ],
 285     'MySQL' => [
 286         "MySQL server",
 287         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 288     ],
 289     'NNTP' => [
 290         "NNTP traffic (Usenet).",
 291         { action => 'PARAM', proto => 'tcp', dport => '119' },
 292     ],
 293     'NNTPS' => [
 294         "Encrypted NNTP traffic (Usenet)",
 295         { action => 'PARAM', proto => 'tcp', dport => '563' },
 296     ],
 297     'NTP' => [
 298         "Network Time Protocol (ntpd)",
 299         { action => 'PARAM', proto => 'udp', dport => '123' },
 300     ],
 301     'OSPF' => [
 302         "OSPF multicast traffic",
 303         { action => 'PARAM', proto => '89' },
 304     ],
 305     'OpenVPN' => [
 306         "OpenVPN traffic",
 307         { action => 'PARAM', proto => 'udp', dport => '1194' },
 308     ],
 309     'PCA' => [
 310         "Symantec PCAnywere (tm)",
 311         { action => 'PARAM', proto => 'udp', dport => '5632' },
 312         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 313     ],
 314     'POP3' => [
 315         "POP3 traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '110' },
 317     ],
 318     'POP3S' => [
 319         "Encrypted POP3 traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '995' },
 321     ],
 322     'PPtP' => [
 323         "Point-to-Point Tunneling Protocol",
 324         { action => 'PARAM', proto => '47' },
 325         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 326     ],
 327     'Ping' => [
 328         "ICMP echo request",
 329         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 330     ],
 331     'PostgreSQL' => [
 332         "PostgreSQL server",
 333         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 334     ],
 335     'Printer' => [
 336         "Line Printer protocol printing",
 337         { action => 'PARAM', proto => 'tcp', dport => '515' },
 338     ],
 339     'RDP' => [
 340         "Microsoft Remote Desktop Protocol traffic",
 341         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 342     ],
 343     'RIP' => [
 344         "Routing Information Protocol (bidirectional)",
 345         { action => 'PARAM', proto => 'udp', dport => '520' },
 346     ],
 347     'RNDC' => [
 348         "BIND remote management protocol",
 349         { action => 'PARAM', proto => 'tcp', dport => '953' },
 350     ],
 351     'Razor' => [
 352         "Razor Antispam System",
 353         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 354     ],
 355     'Rdate' => [
 356         "Remote time retrieval (rdate)",
 357         { action => 'PARAM', proto => 'tcp', dport => '37' },
 358     ],
 359     'Rsync' => [
 360         "Rsync server",
 361         { action => 'PARAM', proto => 'tcp', dport => '873' },
 362     ],
 363     'SANE' => [
 364         "SANE network scanning",
 365         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 366     ],
 367     'SMB' => [
 368         "Microsoft SMB traffic",
 369         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 370         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 371         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 372         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 373     ],
 374     'SMBswat' => [
 375         "Samba Web Administration Tool",
 376         { action => 'PARAM', proto => 'tcp', dport => '901' },
 377     ],
 378     'SMTP' => [
 379         "Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '25' },
 381     ],
 382     'SMTPS' => [
 383         "Encrypted Simple Mail Transfer Protocol",
 384         { action => 'PARAM', proto => 'tcp', dport => '465' },
 385     ],
 386     'SNMP' => [
 387         "Simple Network Management Protocol",
 388         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 389         { action => 'PARAM', proto => 'tcp', dport => '161' },
 390     ],
 391     'SPAMD' => [
 392         "Spam Assassin SPAMD traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '783' },
 394     ],
 395     'SSH' => [
 396         "Secure shell traffic",
 397         { action => 'PARAM', proto => 'tcp', dport => '22' },
 398     ],
 399     'SVN' => [
 400         "Subversion server (svnserve)",
 401         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 402     ],
 403     'SixXS' => [
 404         "SixXS IPv6 Deployment and Tunnel Broker",
 405         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 406         { action => 'PARAM', proto => 'udp', dport => '3740' },
 407         { action => 'PARAM', proto => '41' },
 408         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 409     ],
 410     'Squid' => [
 411         "Squid web proxy traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 413     ],
 414     'Submission' => [
 415         "Mail message submission traffic",
 416         { action => 'PARAM', proto => 'tcp', dport => '587' },
 417     ],
 418     'Syslog' => [
 419         "Syslog protocol (RFC 5424) traffic",
 420         { action => 'PARAM', proto => 'udp', dport => '514' },
 421         { action => 'PARAM', proto => 'tcp', dport => '514' },
 422     ],
 423     'TFTP' => [
 424         "Trivial File Transfer Protocol traffic",
 425         { action => 'PARAM', proto => 'udp', dport => '69' },
 426     ],
 427     'Telnet' => [
 428         "Telnet traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '23' },
 430     ],
 431     'Telnets' => [
 432         "Telnet over SSL",
 433         { action => 'PARAM', proto => 'tcp', dport => '992' },
 434     ],
 435     'Time' => [
 436         "RFC 868 Time protocol",
 437         { action => 'PARAM', proto => 'tcp', dport => '37' },
 438     ],
 439     'Trcrt' => [
 440         "Traceroute (for up to 30 hops) traffic",
 441         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 442         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 443     ],
 444     'VNC' => [
 445         "VNC traffic for VNC display's 0 - 99",
 446         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 447     ],
 448     'VNCL' => [
 449         "VNC traffic from Vncservers to Vncviewers in listen mode",
 450         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 451     ],
 452     'Web' => [
 453         "WWW traffic (HTTP and HTTPS)",
 454         { action => 'PARAM', proto => 'tcp', dport => '80' },
 455         { action => 'PARAM', proto => 'tcp', dport => '443' },
 456     ],
 457     'Webcache' => [
 458         "Web Cache/Proxy traffic (port 8080)",
 459         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 460     ],
 461     'Webmin' => [
 462         "Webmin traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 464     ],
 465     'Whois' => [
 466         "Whois (nicname, RFC 3912) traffic",
 467         { action => 'PARAM', proto => 'tcp', dport => '43' },
 468     ],
 469 };
 470
 471 my $pve_fw_parsed_macros;
 472 my $pve_fw_macro_descr;
 473 my $pve_fw_preferred_macro_names = {};
 474
 475 my $pve_std_chains = {
 476     'PVEFW-SET-ACCEPT-MARK' => [
 477         "-j MARK --set-mark 1",
 478     ],
 479     'PVEFW-DropBroadcast' => [
 480         # same as shorewall 'Broadcast'
 481         # simply DROP BROADCAST/MULTICAST/ANYCAST
 482         # we can use this to reduce logging
 483         { action => 'DROP', dsttype => 'BROADCAST' },
 484         { action => 'DROP', dsttype => 'MULTICAST' },
 485         { action => 'DROP', dsttype => 'ANYCAST' },
 486         { action => 'DROP', dest => '224.0.0.0/4' },
 487     ],
 488     'PVEFW-reject' => [
 489         # same as shorewall 'reject'
 490         { action => 'DROP', dsttype => 'BROADCAST' },
 491         { action => 'DROP', source => '224.0.0.0/4' },
 492         { action => 'DROP', proto => 'icmp' },
 493         "-p tcp -j REJECT --reject-with tcp-reset",
 494         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 495         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 496         "-j REJECT --reject-with icmp-host-prohibited",
 497     ],
 498     'PVEFW-Drop' => [
 499         # same as shorewall 'Drop', which is equal to DROP,
 500         # but REJECT/DROP some packages to reduce logging,
 501         # and ACCEPT critical ICMP types
 502         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 503         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 504         { action => 'PVEFW-DropBroadcast' },
 505         # ACCEPT critical ICMP types
 506         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 507         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 508         # Drop packets with INVALID state
 509         "-m conntrack --ctstate INVALID -j DROP",
 510         # Drop Microsoft SMB noise
 511         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 512         { action => 'DROP', proto => 'udp', dport => '137:139'},
 513         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 514         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 515         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 516         # Drop new/NotSyn traffic so that it doesn't get logged
 517         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 518         # Drop DNS replies
 519         { action => 'DROP', proto => 'udp', sport => 53 },
 520     ],
 521     'PVEFW-Reject' => [
 522         # same as shorewall 'Reject', which is equal to Reject,
 523         # but REJECT/DROP some packages to reduce logging,
 524         # and ACCEPT critical ICMP types
 525         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 526         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 527         { action => 'PVEFW-DropBroadcast' },
 528         # ACCEPT critical ICMP types
 529         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 530         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 531         # Drop packets with INVALID state
 532         "-m conntrack --ctstate INVALID -j DROP",
 533         # Drop Microsoft SMB noise
 534         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 535         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 536         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 537         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 538         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 539         # Drop new/NotSyn traffic so that it doesn't get logged
 540         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 541         # Drop DNS replies
 542         { action => 'DROP', proto => 'udp', sport => 53 },
 543     ],
 544     'PVEFW-tcpflags' => [
 545         # same as shorewall tcpflags action.
 546         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 547         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 548         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 549         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 550         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 551         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 552     ],
 553     'PVEFW-smurfs' => [
 554         # same as shorewall smurfs action
 555         # Filter packets for smurfs (packets with a broadcast address as the source).
 556         "-s 0.0.0.0/32 -j RETURN",
 557         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 558         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 559     ],
 560 };
 561
 562 # iptables -p icmp -h
 563 my $icmp_type_names = {
 564     any => 1,
 565     'echo-reply' => 1,
 566     'destination-unreachable' => 1,
 567     'network-unreachable' => 1,
 568     'host-unreachable' => 1,
 569     'protocol-unreachable' => 1,
 570     'port-unreachable' => 1,
 571     'fragmentation-needed' => 1,
 572     'source-route-failed' => 1,
 573     'network-unknown' => 1,
 574     'host-unknown' => 1,
 575     'network-prohibited' => 1,
 576     'host-prohibited' => 1,
 577     'TOS-network-unreachable' => 1,
 578     'TOS-host-unreachable' => 1,
 579     'communication-prohibited' => 1,
 580     'host-precedence-violation' => 1,
 581     'precedence-cutoff' => 1,
 582     'source-quench' => 1,
 583     'redirect' => 1,
 584     'network-redirect' => 1,
 585     'host-redirect' => 1,
 586     'TOS-network-redirect' => 1,
 587     'TOS-host-redirect' => 1,
 588     'echo-request' => 1,
 589     'router-advertisement' => 1,
 590     'router-solicitation' => 1,
 591     'time-exceeded' => 1,
 592     'ttl-zero-during-transit' => 1,
 593     'ttl-zero-during-reassembly' => 1,
 594     'parameter-problem' => 1,
 595     'ip-header-bad' => 1,
 596     'required-option-missing' => 1,
 597     'timestamp-request' => 1,
 598     'timestamp-reply' => 1,
 599     'address-mask-request' => 1,
 600     'address-mask-reply' => 1,
 601 };
 602
 603 sub init_firewall_macros {
 604
 605     $pve_fw_parsed_macros = {};
 606
 607     foreach my $k (keys %$pve_fw_macros) {
 608         my $lc_name = lc($k);
 609         my $macro = $pve_fw_macros->{$k};
 610         if (!ref($macro->[0])) {
 611             $pve_fw_macro_descr->{$k} = shift @$macro;
 612         }
 613         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 614         $pve_fw_parsed_macros->{$k} = $macro;
 615     }
 616 }
 617
 618 init_firewall_macros();
 619
 620 sub get_macros {
 621     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 622 }
 623
 624 my $etc_services;
 625
 626 sub get_etc_services {
 627
 628     return $etc_services if $etc_services;
 629
 630     my $filename = "/etc/services";
 631
 632     my $fh = IO::File->new($filename, O_RDONLY);
 633     if (!$fh) {
 634         warn "unable to read '$filename' - $!\n";
 635         return {};
 636     }
 637
 638     my $services = {};
 639
 640     while (my $line = <$fh>) {
 641         chomp ($line);
 642         next if $line =~m/^#/;
 643         next if ($line =~m/^\s*$/);
 644
 645         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 646             $services->{byid}->{$2}->{name} = $1;
 647             $services->{byid}->{$2}->{port} = $2;
 648             $services->{byid}->{$2}->{$3} = 1;
 649             $services->{byname}->{$1} = $services->{byid}->{$2};
 650         }
 651     }
 652
 653     close($fh);
 654
 655     $etc_services = $services;
 656
 657
 658     return $etc_services;
 659 }
 660
 661 my $etc_protocols;
 662
 663 sub get_etc_protocols {
 664     return $etc_protocols if $etc_protocols;
 665
 666     my $filename = "/etc/protocols";
 667
 668     my $fh = IO::File->new($filename, O_RDONLY);
 669     if (!$fh) {
 670         warn "unable to read '$filename' - $!\n";
 671         return {};
 672     }
 673
 674     my $protocols = {};
 675
 676     while (my $line = <$fh>) {
 677         chomp ($line);
 678         next if $line =~m/^#/;
 679         next if ($line =~m/^\s*$/);
 680
 681         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 682             $protocols->{byid}->{$2}->{name} = $1;
 683             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 684         }
 685     }
 686
 687     close($fh);
 688
 689     $etc_protocols = $protocols;
 690
 691     return $etc_protocols;
 692 }
 693
 694 my $ipv4_mask_hash_localnet = {
 695     '255.255.0.0' => 16,
 696     '255.255.128.0' => 17,
 697     '255.255.192.0' => 18,
 698     '255.255.224.0' => 19,
 699     '255.255.240.0' => 20,
 700     '255.255.248.0' => 21,
 701     '255.255.252.0' => 22,
 702     '255.255.254.0' => 23,
 703     '255.255.255.0' => 24,
 704     '255.255.255.128' => 25,
 705     '255.255.255.192' => 26,
 706     '255.255.255.224' => 27,
 707     '255.255.255.240' => 28,
 708     '255.255.255.248' => 29,
 709     '255.255.255.252' => 30,
 710 };
 711
 712 my $__local_network;
 713
 714 sub local_network {
 715     my ($new_value) = @_;
 716
 717     $__local_network = $new_value if defined($new_value);
 718
 719     return $__local_network if defined($__local_network);
 720
 721     eval {
 722         my $nodename = PVE::INotify::nodename();
 723
 724         my $ip = PVE::Cluster::remote_node_ip($nodename);
 725
 726         my $testip = Net::IP->new($ip);
 727
 728         my $routes = PVE::ProcFSTools::read_proc_net_route();
 729         foreach my $entry (@$routes) {
 730             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 731             next if !defined($mask);
 732             return if $mask eq '0.0.0.0';
 733             my $cidr = "$entry->{dest}/$mask";
 734             my $testnet = Net::IP->new($cidr);
 735             if ($testnet->overlaps($testip)) {
 736                 $__local_network = $cidr;
 737                 return;
 738             }
 739         }
 740     };
 741     warn $@ if $@;
 742
 743     return $__local_network;
 744 }
 745
 746 my $max_iptables_ipset_name_length = 27;
 747
 748 sub compute_ipset_chain_name {
 749     my ($vmid, $ipset_name) = @_;
 750
 751     $vmid = 0 if !defined($vmid);
 752
 753     my $id = "$vmid-${ipset_name}";
 754
 755
 756     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 757         $id = PVE::Tools::fnv31a_hex($id);
 758     }
 759
 760     return "PVEFW-$id";
 761 }
 762
 763 sub parse_address_list {
 764     my ($str) = @_;
 765
 766     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 767         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 768         return;
 769     }
 770
 771     if ($str =~ m/^${ip_alias_pattern}$/) {
 772         die "alias name too long\n" if length($str) > $max_alias_name_length;
 773         return;
 774     }
 775
 776     my $count = 0;
 777     my $iprange = 0;
 778     foreach my $elem (split(/,/, $str)) {
 779         $count++;
 780         if (!Net::IP->new($elem)) {
 781             my $err = Net::IP::Error();
 782             die "invalid IP address: $err\n";
 783         }
 784         $iprange = 1 if $elem =~ m/-/;
 785     }
 786
 787     die "you can use a range in a list\n" if $iprange && $count > 1;
 788 }
 789
 790 sub parse_port_name_number_or_range {
 791     my ($str) = @_;
 792
 793     my $services = PVE::Firewall::get_etc_services();
 794     my $count = 0;
 795     my $icmp_port = 0;
 796
 797     foreach my $item (split(/,/, $str)) {
 798         $count++;
 799         if ($item =~ m/^(\d+):(\d+)$/) {
 800             my ($port1, $port2) = ($1, $2);
 801             die "invalid port '$port1'\n" if $port1 > 65535;
 802             die "invalid port '$port2'\n" if $port2 > 65535;
 803         } elsif ($item =~ m/^(\d+)$/) {
 804             my $port = $1;
 805             die "invalid port '$port'\n" if $port > 65535;
 806         } else {
 807             if ($icmp_type_names->{$item}) {
 808                 $icmp_port = 1;
 809             } else {
 810                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 811             }
 812         }
 813     }
 814
 815     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 816
 817     return $count;
 818 }
 819
 820 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 821 sub pve_fw_verify_port_spec {
 822    my ($portstr) = @_;
 823
 824    parse_port_name_number_or_range($portstr);
 825
 826    return $portstr;
 827 }
 828
 829 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 830 sub pve_fw_verify_v4addr_spec {
 831    my ($list) = @_;
 832
 833    parse_address_list($list);
 834
 835    return $list;
 836 }
 837
 838 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 839 sub pve_fw_verify_protocol_spec {
 840    my ($proto) = @_;
 841
 842    my $protocols = get_etc_protocols();
 843
 844    die "unknown protocol '$proto'\n" if $proto &&
 845        !(defined($protocols->{byname}->{$proto}) ||
 846          defined($protocols->{byid}->{$proto}));
 847
 848    return $proto;
 849 }
 850
 851
 852 # helper function for API
 853
 854 sub copy_opject_with_digest {
 855     my ($object) = @_;
 856
 857     my $sha = Digest::SHA->new('sha1');
 858
 859     my $res = {};
 860     foreach my $k (sort keys %$object) {
 861         my $v = $object->{$k};
 862         next if !defined($v);
 863         $res->{$k} = $v;
 864         $sha->add($k, ':', $v, "\n");
 865     }
 866
 867     my $digest = $sha->hexdigest;
 868
 869     $res->{digest} = $digest;
 870
 871     return wantarray ? ($res, $digest) : $res;
 872 }
 873
 874 sub copy_list_with_digest {
 875     my ($list) = @_;
 876
 877     my $sha = Digest::SHA->new('sha1');
 878
 879     my $res = [];
 880     foreach my $entry (@$list) {
 881         my $data = {};
 882         foreach my $k (sort keys %$entry) {
 883             my $v = $entry->{$k};
 884             next if !defined($v);
 885             $data->{$k} = $v;
 886             # Note: digest ignores refs ($rule->{errors})
 887             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 888         }
 889         push @$res, $data;
 890     }
 891
 892     my $digest = $sha->hexdigest;
 893
 894     foreach my $entry (@$res) {
 895         $entry->{digest} = $digest;
 896     }
 897
 898     return wantarray ? ($res, $digest) : $res;
 899 }
 900
 901 my $rule_properties = {
 902     pos => {
 903         description => "Update rule at position <pos>.",
 904         type => 'integer',
 905         minimum => 0,
 906         optional => 1,
 907     },
 908     digest => get_standard_option('pve-config-digest'),
 909     type => {
 910         type => 'string',
 911         optional => 1,
 912         enum => ['in', 'out', 'group'],
 913     },
 914     action => {
 915         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 916         type => 'string',
 917         optional => 1,
 918         pattern => $security_group_name_pattern,
 919         maxLength => 20,
 920         minLength => 2,
 921     },
 922     macro => {
 923         type => 'string',
 924         optional => 1,
 925         maxLength => 128,
 926     },
 927     iface => get_standard_option('pve-iface', { optional => 1 }),
 928     source => {
 929         type => 'string', format => 'pve-fw-v4addr-spec',
 930         optional => 1,
 931     },
 932     dest => {
 933         type => 'string', format => 'pve-fw-v4addr-spec',
 934         optional => 1,
 935     },
 936     proto => {
 937         type => 'string', format => 'pve-fw-protocol-spec',
 938         optional => 1,
 939     },
 940     enable => {
 941         type => 'boolean',
 942         optional => 1,
 943     },
 944     sport => {
 945         type => 'string', format => 'pve-fw-port-spec',
 946         optional => 1,
 947     },
 948     dport => {
 949         type => 'string', format => 'pve-fw-port-spec',
 950         optional => 1,
 951     },
 952     comment => {
 953         type => 'string',
 954         optional => 1,
 955     },
 956 };
 957
 958 sub add_rule_properties {
 959     my ($properties) = @_;
 960
 961     foreach my $k (keys %$rule_properties) {
 962         my $h = $rule_properties->{$k};
 963         # copy data, so that we can modify later without side effects
 964         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 965     }
 966
 967     return $properties;
 968 }
 969
 970 sub delete_rule_properties {
 971     my ($rule, $delete_str) = @_;
 972
 973     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 974         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 975             if !defined($rule_properties->{$opt});
 976         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 977             if $opt eq 'type' || $opt eq 'action';
 978         delete $rule->{$opt};
 979     }
 980
 981     return $rule;
 982 }
 983
 984 my $apply_macro = sub {
 985     my ($macro_name, $param, $verify) = @_;
 986
 987     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 988     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 989
 990     my $rules = [];
 991
 992     foreach my $templ (@$macro_rules) {
 993         my $rule = {};
 994         my $param_used = {};
 995         foreach my $k (keys %$templ) {
 996             my $v = $templ->{$k};
 997             if ($v eq 'PARAM') {
 998                 $v = $param->{$k};
 999                 $param_used->{$k} = 1;
1000             } elsif ($v eq 'DEST') {
1001                 $v = $param->{dest};
1002                 $param_used->{dest} = 1;
1003             } elsif ($v eq 'SOURCE') {
1004                 $v = $param->{source};
1005                 $param_used->{source} = 1;
1006             }
1007
1008             if (!defined($v)) {
1009                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1010                 raise_param_exc({ macro => $msg }) if $verify;
1011                 die "$msg\n";
1012             }
1013             $rule->{$k} = $v;
1014         }
1015         foreach my $k (keys %$param) {
1016             next if $k eq 'macro';
1017             next if !defined($param->{$k});
1018             next if $param_used->{$k};
1019             if (defined($rule->{$k})) {
1020                 if ($rule->{$k} ne $param->{$k}) {
1021                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1022                     raise_param_exc({ $k => $msg }) if $verify;
1023                     die "$msg\n";
1024                 }
1025             } else {
1026                 $rule->{$k} = $param->{$k};
1027             }
1028         }
1029         push @$rules, $rule;
1030     }
1031
1032     return $rules;
1033 };
1034
1035 my $rule_env_iface_lookup = {
1036     'ct' => 1,
1037     'vm' => 1,
1038     'group' => 0,
1039     'cluster' => 1,
1040     'host' => 1,
1041 };
1042
1043 sub verify_rule {
1044     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1045
1046     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1047
1048     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1049     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1050
1051     my $errors = $rule->{errors} || {};
1052
1053     my $error_count = 0;
1054
1055     my $add_error = sub {
1056         my ($param, $msg)  = @_;
1057         chomp $msg;
1058         raise_param_exc({ $param => $msg }) if !$noerr;
1059         $error_count++;
1060         $errors->{$param} = $msg if !$errors->{$param};
1061     };
1062
1063     my $check_ipset_or_alias_property = sub {
1064         my ($name) = @_;
1065
1066         if (my $value = $rule->{$name}) {
1067             if ($value =~ m/^\+/) {
1068                 if ($value =~ m/^\+(${security_group_name_pattern})$/) {
1069                     &$add_error($name, "no such ipset '$1'")
1070                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1071
1072                 } else {
1073                     &$add_error($name, "invalid security group name '$value'");
1074                 }
1075             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1076                 my $alias = lc($value);
1077                 &$add_error($name, "no such alias '$value'")
1078                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1079             }
1080         }
1081     };
1082
1083     my $type = $rule->{type};
1084     my $action = $rule->{action};
1085
1086     &$add_error('type', "missing property") if !$type;
1087     &$add_error('action', "missing property") if !$action;
1088
1089     if ($type) {
1090         if ($type eq  'in' || $type eq 'out') {
1091             &$add_error('action', "unknown action '$action'")
1092                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1093         } elsif ($type eq 'group') {
1094             &$add_error('type', "security groups not allowed")
1095                 if !$allow_groups;
1096             &$add_error('action', "invalid characters in security group name")
1097                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1098         } else {
1099             &$add_error('type', "unknown rule type '$type'");
1100         }
1101     }
1102
1103     if ($rule->{iface}) {
1104         &$add_error('type', "parameter -i not allowed for this rule type")
1105             if !$allow_iface;
1106         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1107         &$add_error('iface', $@) if $@;
1108         if ($rule_env eq 'vm') {
1109             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1110                 if $rule->{iface} !~  m/^net(\d+)$/;
1111         } elsif ($rule_env eq 'ct') {
1112             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1113                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1114         }
1115     }
1116
1117     if ($rule->{macro}) {
1118         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1119             $rule->{macro} = $preferred_name;
1120         } else {
1121             &$add_error('macro', "unknown macro '$rule->{macro}'");
1122         }
1123     }
1124
1125     if ($rule->{proto}) {
1126         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1127         &$add_error('proto', $@) if $@;
1128     }
1129
1130     if ($rule->{dport}) {
1131         eval { parse_port_name_number_or_range($rule->{dport}); };
1132         &$add_error('dport', $@) if $@;
1133         &$add_error('proto', "missing property - 'dport' requires this property")
1134             if !$rule->{proto};
1135     }
1136
1137     if ($rule->{sport}) {
1138         eval { parse_port_name_number_or_range($rule->{sport}); };
1139         &$add_error('sport', $@) if $@;
1140         &$add_error('proto', "missing property - 'sport' requires this property")
1141             if !$rule->{proto};
1142     }
1143
1144     if ($rule->{source}) {
1145         eval { parse_address_list($rule->{source}); };
1146         &$add_error('source', $@) if $@;
1147         &$check_ipset_or_alias_property('source');
1148     }
1149
1150     if ($rule->{dest}) {
1151         eval { parse_address_list($rule->{dest}); };
1152         &$add_error('dest', $@) if $@;
1153         &$check_ipset_or_alias_property('dest');
1154     }
1155
1156     if ($rule->{macro} && !$error_count) {
1157         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1158         if (my $err = $@) {
1159             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1160                 my $eh = $err->{errors};
1161                 foreach my $p (keys %$eh) {
1162                     &$add_error($p, $eh->{$p});
1163                 }
1164             } else {
1165                 &$add_error('macro', "$err");
1166             }
1167         }
1168     }
1169
1170     $rule->{errors} = $errors if $error_count;
1171
1172     return $rule;
1173 }
1174
1175 sub copy_rule_data {
1176     my ($rule, $param) = @_;
1177
1178     foreach my $k (keys %$rule_properties) {
1179         if (defined(my $v = $param->{$k})) {
1180             if ($v eq '' || $v eq '-') {
1181                 delete $rule->{$k};
1182             } else {
1183                 $rule->{$k} = $v;
1184             }
1185         }
1186     }
1187
1188     return $rule;
1189 }
1190
1191 # core functions
1192 my $bridge_firewall_enabled = 0;
1193
1194 sub enable_bridge_firewall {
1195
1196     return if $bridge_firewall_enabled; # only once
1197
1198     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1199     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1200
1201     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1202     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1203
1204     $bridge_firewall_enabled = 1;
1205 }
1206
1207 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1208
1209 sub iptables_restore_cmdlist {
1210     my ($cmdlist) = @_;
1211
1212     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1213 }
1214
1215 sub ipset_restore_cmdlist {
1216     my ($cmdlist) = @_;
1217
1218     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1219 }
1220
1221 sub iptables_get_chains {
1222
1223     my $res = {};
1224
1225     # check what chains we want to track
1226     my $is_pvefw_chain = sub {
1227         my $name = shift;
1228
1229         return 1 if $name =~ m/^PVEFW-\S+$/;
1230
1231         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1232
1233         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1234
1235         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1236
1237         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1238         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1239
1240         return undef;
1241     };
1242
1243     my $table = '';
1244
1245     my $hooks = {};
1246
1247     my $parser = sub {
1248         my $line = shift;
1249
1250         return if $line =~ m/^#/;
1251         return if $line =~ m/^\s*$/;
1252
1253         if ($line =~ m/^\*(\S+)$/) {
1254             $table = $1;
1255             return;
1256         }
1257
1258         return if $table ne 'filter';
1259
1260         if ($line =~ m/^:(\S+)\s/) {
1261             my $chain = $1;
1262             return if !&$is_pvefw_chain($chain);
1263             $res->{$chain} = "unknown";
1264         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1265             my ($chain, $sig) = ($1, $2);
1266             return if !&$is_pvefw_chain($chain);
1267             $res->{$chain} = $sig;
1268         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1269             $hooks->{$1} = 1;
1270         } else {
1271             # simply ignore the rest
1272             return;
1273         }
1274     };
1275
1276     run_command("/sbin/iptables-save", outfunc => $parser);
1277
1278     return wantarray ? ($res, $hooks) : $res;
1279 }
1280
1281 sub iptables_chain_digest {
1282     my ($rules) = @_;
1283     my $digest = Digest::SHA->new('sha1');
1284     foreach my $rule (@$rules) { # order is important
1285         $digest->add($rule);
1286     }
1287     return $digest->b64digest;
1288 }
1289
1290 sub ipset_chain_digest {
1291     my ($rules) = @_;
1292
1293     my $digest = Digest::SHA->new('sha1');
1294     foreach my $rule (sort @$rules) { # note: sorted
1295         $digest->add($rule);
1296     }
1297     return $digest->b64digest;
1298 }
1299
1300 sub ipset_get_chains {
1301
1302     my $res = {};
1303     my $chains = {};
1304
1305     my $parser = sub {
1306         my $line = shift;
1307
1308         return if $line =~ m/^#/;
1309         return if $line =~ m/^\s*$/;
1310         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1311             my $chain = $1;
1312             $line =~ s/\s+$//; # delete trailing white space
1313             push @{$chains->{$chain}}, $line;
1314         } else {
1315             # simply ignore the rest
1316             return;
1317         }
1318     };
1319
1320     run_command("/usr/sbin/ipset save", outfunc => $parser);
1321
1322     # compute digest for each chain
1323     foreach my $chain (keys %$chains) {
1324         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1325     }
1326
1327     return $res;
1328 }
1329
1330 sub ruleset_generate_cmdstr {
1331     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1332
1333     return if defined($rule->{enable}) && !$rule->{enable};
1334     return if $rule->{errors};
1335
1336     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1337
1338     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1339     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1340
1341     my @cmd = ();
1342
1343     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1344     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1345
1346     my $source = $rule->{source};
1347     my $dest = $rule->{dest};
1348
1349     if ($source) {
1350         if ($source =~ m/^\+/) {
1351             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1352                 my $name = $1;
1353                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1354                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1355                     push @cmd, "-m set --match-set ${ipset_chain} src";
1356                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1357                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1358                     push @cmd, "-m set --match-set ${ipset_chain} src";
1359                 } else {
1360                     die "no such ipset '$name'\n";
1361                 }
1362             } else {
1363                 die "invalid security group name '$source'\n";
1364             }
1365         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1366             my $alias = lc($source);
1367             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1368             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1369             die "no such alias '$source'\n" if !$e;
1370             push @cmd, "-s $e->{cidr}";
1371         } elsif ($source =~ m/\-/){
1372             push @cmd, "-m iprange --src-range $source";
1373         } else {
1374             push @cmd, "-s $source";
1375         }
1376     }
1377
1378     if ($dest) {
1379         if ($dest =~ m/^\+/) {
1380             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1381                 my $name = $1;
1382                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1383                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1384                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1385                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1386                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1387                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1388                 } else {
1389                     die "no such ipset '$name'\n";
1390                 }
1391             } else {
1392                 die "invalid security group name '$dest'\n";
1393             }
1394         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1395             my $alias = lc($dest);
1396             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1397             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1398             die "no such alias '$dest'\n" if !$e;
1399             push @cmd, "-d $e->{cidr}";
1400         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1401             push @cmd, "-m iprange --dst-range $dest";
1402         } else {
1403             push @cmd, "-d $dest";
1404         }
1405     }
1406
1407     if ($rule->{proto}) {
1408         push @cmd, "-p $rule->{proto}";
1409
1410         my $multiport = 0;
1411         $multiport++ if $nbdport > 1;
1412         $multiport++ if $nbsport > 1;
1413
1414         push @cmd, "--match multiport" if $multiport;
1415
1416         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1417             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1418
1419         if ($rule->{dport}) {
1420             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1421                 # Note: we use dport to store --icmp-type
1422                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1423                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1424             } else {
1425                 if ($nbdport > 1) {
1426                     if ($multiport == 2) {
1427                         push @cmd,  "--ports $rule->{dport}";
1428                     } else {
1429                         push @cmd, "--dports $rule->{dport}";
1430                     }
1431                 } else {
1432                     push @cmd, "--dport $rule->{dport}";
1433                 }
1434             }
1435         }
1436
1437         if ($rule->{sport}) {
1438             if ($nbsport > 1) {
1439                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1440             } else {
1441                 push @cmd, "--sport $rule->{sport}";
1442             }
1443         }
1444     } elsif ($rule->{dport} || $rule->{sport}) {
1445         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1446         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1447     }
1448
1449     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1450
1451     if (my $action = $rule->{action}) {
1452         $action = $actions->{$action} if defined($actions->{$action});
1453         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1454         push @cmd, $goto ? "-g $action" : "-j $action";
1455     }
1456
1457     return scalar(@cmd) ? join(' ', @cmd) : undef;
1458 }
1459
1460 sub ruleset_generate_rule {
1461     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1462
1463     my $rules;
1464
1465     if ($rule->{macro}) {
1466         $rules = &$apply_macro($rule->{macro}, $rule);
1467     } else {
1468         $rules = [ $rule ];
1469     }
1470
1471     # update all or nothing
1472
1473     my @cmds = ();
1474     foreach my $tmp (@$rules) {
1475         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1476             push @cmds, $cmdstr;
1477         }
1478     }
1479
1480     foreach my $cmdstr (@cmds) {
1481         ruleset_addrule($ruleset, $chain, $cmdstr);
1482     }
1483 }
1484
1485 sub ruleset_generate_rule_insert {
1486     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1487
1488     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1489
1490     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1491         ruleset_insertrule($ruleset, $chain, $cmdstr);
1492     }
1493 }
1494
1495 sub ruleset_create_chain {
1496     my ($ruleset, $chain) = @_;
1497
1498     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1499     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1500
1501     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1502
1503     $ruleset->{$chain} = [];
1504 }
1505
1506 sub ruleset_chain_exist {
1507     my ($ruleset, $chain) = @_;
1508
1509     return $ruleset->{$chain} ? 1 : undef;
1510 }
1511
1512 sub ruleset_addrule {
1513    my ($ruleset, $chain, $rule) = @_;
1514
1515    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1516
1517    push @{$ruleset->{$chain}}, "-A $chain $rule";
1518 }
1519
1520 sub ruleset_insertrule {
1521    my ($ruleset, $chain, $rule) = @_;
1522
1523    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1524
1525    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1526 }
1527
1528 sub get_log_rule_base {
1529     my ($chain, $vmid, $msg, $loglevel) = @_;
1530
1531     die "internal error - no log level" if !defined($loglevel);
1532
1533     $vmid = 0 if !defined($vmid);
1534
1535     # Note: we use special format for prefix to pass further
1536     # info to log daemon (VMID, LOGVELEL and CHAIN)
1537
1538     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1539 }
1540
1541 sub ruleset_addlog {
1542     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1543
1544     return if !defined($loglevel);
1545
1546     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1547
1548     $logrule = "$rule $logrule" if defined($rule);
1549
1550     ruleset_addrule($ruleset, $chain, $logrule);
1551 }
1552
1553 sub ruleset_add_chain_policy {
1554     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1555
1556     if ($policy eq 'ACCEPT') {
1557
1558         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1559                               { ACCEPT =>  $accept_action});
1560
1561     } elsif ($policy eq 'DROP') {
1562
1563         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1564
1565         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1566
1567         ruleset_addrule($ruleset, $chain, "-j DROP");
1568     } elsif ($policy eq 'REJECT') {
1569         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1570
1571         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1572
1573         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1574     } else {
1575         # should not happen
1576         die "internal error: unknown policy '$policy'";
1577     }
1578 }
1579
1580 sub ruleset_chain_add_conn_filters {
1581     my ($ruleset, $chain, $accept) = @_;
1582
1583     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1584     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1585 }
1586
1587 sub ruleset_chain_add_input_filters {
1588     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1589
1590     if ($cluster_conf->{ipset}->{blacklist}){
1591         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1592             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1593             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1594             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1595         }
1596         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1597         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1598     }
1599
1600     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1601         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1602     }
1603
1604     if ($options->{tcpflags}) {
1605         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1606     }
1607 }
1608
1609 sub ruleset_create_vm_chain {
1610     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1611
1612     ruleset_create_chain($ruleset, $chain);
1613     my $accept = generate_nfqueue($options);
1614
1615     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1616         if ($direction eq 'OUT') {
1617             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1618                                                       proto => 'udp', sport => 68, dport => 67 });
1619         } else {
1620             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1621                                                       proto => 'udp', sport => 67, dport => 68 });
1622         }
1623     }
1624
1625     if ($direction eq 'OUT') {
1626         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1627             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1628         }
1629         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1630     }
1631 }
1632
1633 sub ruleset_add_group_rule {
1634     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1635
1636     my $group = $rule->{action};
1637     my $group_chain = "GROUP-$group-$direction";
1638     if(!ruleset_chain_exist($ruleset, $group_chain)){
1639         generate_group_rules($ruleset, $cluster_conf, $group);
1640     }
1641
1642     if ($direction eq 'OUT' && $rule->{iface_out}) {
1643         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1644     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1645         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1646     } else {
1647         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1648     }
1649
1650     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1651 }
1652
1653 sub ruleset_generate_vm_rules {
1654     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1655
1656     my $lc_direction = lc($direction);
1657
1658     my $in_accept = generate_nfqueue($options);
1659
1660     foreach my $rule (@$rules) {
1661         next if $rule->{iface} && $rule->{iface} ne $netid;
1662         next if !$rule->{enable} || $rule->{errors};
1663         if ($rule->{type} eq 'group') {
1664             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1665                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1666         } else {
1667             next if $rule->{type} ne $lc_direction;
1668             eval {
1669                 if ($direction eq 'OUT') {
1670                     ruleset_generate_rule($ruleset, $chain, $rule,
1671                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1672                                           undef, $cluster_conf, $vmfw_conf);
1673                 } else {
1674                     ruleset_generate_rule($ruleset, $chain, $rule,
1675                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1676                                           undef, $cluster_conf, $vmfw_conf);
1677                 }
1678             };
1679             warn $@ if $@;
1680         }
1681     }
1682 }
1683
1684 sub generate_nfqueue {
1685     my ($options) = @_;
1686
1687     if ($options->{ips}) {
1688         my $action = "NFQUEUE";
1689         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1690             if (defined($3) && defined($1)) {
1691                 $action .= " --queue-balance $1:$3";
1692             } elsif (defined($1)) {
1693                 $action .= " --queue-num $1";
1694             }
1695         }
1696         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1697         return $action;
1698     } else {
1699         return "ACCEPT";
1700     }
1701 }
1702
1703 sub ruleset_generate_vm_ipsrules {
1704     my ($ruleset, $options, $direction, $iface) = @_;
1705
1706     if ($options->{ips} && $direction eq 'IN') {
1707         my $nfqueue = generate_nfqueue($options);
1708
1709         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1710             ruleset_create_chain($ruleset, "PVEFW-IPS");
1711         }
1712
1713         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1714     }
1715 }
1716
1717 sub generate_venet_rules_direction {
1718     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1719
1720     my $lc_direction = lc($direction);
1721
1722     my $rules = $vmfw_conf->{rules};
1723
1724     my $options = $vmfw_conf->{options};
1725     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1726
1727     my $chain = "venet0-$vmid-$direction";
1728
1729     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1730
1731     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1732
1733     # implement policy
1734     my $policy;
1735
1736     if ($direction eq 'OUT') {
1737         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1738     } else {
1739         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1740     }
1741
1742     my $accept = generate_nfqueue($options);
1743     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1744     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1745
1746     if ($direction eq 'OUT') {
1747         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1748             action => $chain,
1749             source => $ip,
1750             iface_in => 'venet0'});
1751     } else {
1752         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1753             action => $chain,
1754             dest => $ip,
1755             iface_out => 'venet0'});
1756     }
1757 }
1758
1759 sub generate_tap_rules_direction {
1760     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1761
1762     my $lc_direction = lc($direction);
1763
1764     my $rules = $vmfw_conf->{rules};
1765
1766     my $options = $vmfw_conf->{options};
1767     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1768
1769     my $tapchain = "$iface-$direction";
1770
1771     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1772
1773     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1774
1775     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1776
1777     # implement policy
1778     my $policy;
1779
1780     if ($direction eq 'OUT') {
1781         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1782     } else {
1783         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1784     }
1785
1786     my $accept = generate_nfqueue($options);
1787     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1788     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1789
1790     # plug the tap chain to bridge chain
1791     if ($direction eq 'IN') {
1792         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1793                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1794     } else {
1795         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1796                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1797     }
1798 }
1799
1800 sub enable_host_firewall {
1801     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1802
1803     my $options = $hostfw_conf->{options};
1804     my $cluster_options = $cluster_conf->{options};
1805     my $rules = $hostfw_conf->{rules};
1806     my $cluster_rules = $cluster_conf->{rules};
1807
1808     # host inbound firewall
1809     my $chain = "PVEFW-HOST-IN";
1810     ruleset_create_chain($ruleset, $chain);
1811
1812     my $loglevel = get_option_log_level($options, "log_level_in");
1813
1814     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1815
1816     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1817     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1818
1819     # we use RETURN because we need to check also tap rules
1820     my $accept_action = 'RETURN';
1821
1822     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1823
1824     # add host rules first, so that cluster wide rules can be overwritten
1825     foreach my $rule (@$rules, @$cluster_rules) {
1826         next if !$rule->{enable} || $rule->{errors};
1827
1828         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1829
1830         eval {
1831             if ($rule->{type} eq 'group') {
1832                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1833             } elsif ($rule->{type} eq 'in') {
1834                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1835                                       undef, $cluster_conf, $hostfw_conf);
1836             }
1837         };
1838         warn $@ if $@;
1839         delete $rule->{iface_in};
1840     }
1841
1842     # allow standard traffic for management ipset (includes cluster network)
1843     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1844     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1845     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1846     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1847     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1848     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1849
1850     my $localnet = local_network();
1851
1852     # corosync
1853     if ($localnet) {
1854         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1855         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1856         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1857     }
1858
1859     # implement input policy
1860     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1861     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1862
1863     # host outbound firewall
1864     $chain = "PVEFW-HOST-OUT";
1865     ruleset_create_chain($ruleset, $chain);
1866
1867     $loglevel = get_option_log_level($options, "log_level_out");
1868
1869     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1870
1871     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1872
1873     # we use RETURN because we may want to check other thigs later
1874     $accept_action = 'RETURN';
1875
1876     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1877
1878     # add host rules first, so that cluster wide rules can be overwritten
1879     foreach my $rule (@$rules, @$cluster_rules) {
1880         next if !$rule->{enable} || $rule->{errors};
1881
1882         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1883         eval {
1884             if ($rule->{type} eq 'group') {
1885                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1886             } elsif ($rule->{type} eq 'out') {
1887                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1888                                       undef, $cluster_conf, $hostfw_conf);
1889             }
1890         };
1891         warn $@ if $@;
1892         delete $rule->{iface_out};
1893     }
1894
1895     # allow standard traffic on cluster network
1896     if ($localnet) {
1897         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1898         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1899         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1900         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1901
1902         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1903         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1904         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1905     }
1906
1907     # implement output policy
1908     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1909     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1910
1911     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1912     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1913 }
1914
1915 sub generate_group_rules {
1916     my ($ruleset, $cluster_conf, $group) = @_;
1917
1918     my $rules = $cluster_conf->{groups}->{$group};
1919
1920     if (!$rules) {
1921         warn "no such security group '$group'\n";
1922         $rules = []; # create empty chain
1923     }
1924
1925     my $chain = "GROUP-${group}-IN";
1926
1927     ruleset_create_chain($ruleset, $chain);
1928     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1929
1930     foreach my $rule (@$rules) {
1931         next if $rule->{type} ne 'in';
1932         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1933     }
1934
1935     $chain = "GROUP-${group}-OUT";
1936
1937     ruleset_create_chain($ruleset, $chain);
1938     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1939
1940     foreach my $rule (@$rules) {
1941         next if $rule->{type} ne 'out';
1942         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1943         # check also other tap rules later
1944         ruleset_generate_rule($ruleset, $chain, $rule,
1945                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1946     }
1947 }
1948
1949 my $MAX_NETS = 32;
1950 my $valid_netdev_names = {};
1951 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1952     $valid_netdev_names->{"net$i"} = 1;
1953 }
1954
1955 sub parse_fw_rule {
1956     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1957
1958     chomp $line;
1959
1960     my $orig_line = $line;
1961
1962     my $rule = {};
1963
1964     # we can add single line comments to the end of the rule
1965     if ($line =~ s/#\s*(.*?)\s*$//) {
1966         $rule->{comment} = decode('utf8', $1);
1967     }
1968
1969     # we can disable a rule when prefixed with '|'
1970
1971     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1972
1973     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1974         die "unable to parse rule: $line\n";
1975
1976     $rule->{type} = lc($1);
1977     $rule->{action} = $2;
1978
1979     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1980         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1981             $rule->{macro} = $1;
1982             $rule->{action} = $2;
1983         }
1984     }
1985
1986     while (length($line)) {
1987         if ($line =~ s/^-i (\S+)\s*//) {
1988             $rule->{iface} = $1;
1989             next;
1990         }
1991
1992         last if $rule->{type} eq 'group';
1993
1994         if ($line =~ s/^-p (\S+)\s*//) {
1995             $rule->{proto} = $1;
1996             next;
1997         }
1998
1999         if ($line =~ s/^-dport (\S+)\s*//) {
2000             $rule->{dport} = $1;
2001             next;
2002         }
2003
2004         if ($line =~ s/^-sport (\S+)\s*//) {
2005             $rule->{sport} = $1;
2006             next;
2007         }
2008         if ($line =~ s/^-source (\S+)\s*//) {
2009             $rule->{source} = $1;
2010             next;
2011         }
2012         if ($line =~ s/^-dest (\S+)\s*//) {
2013             $rule->{dest} = $1;
2014             next;
2015         }
2016
2017         last;
2018     }
2019
2020     die "unable to parse rule parameters: $line\n" if length($line);
2021
2022     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2023     if ($verbose && $rule->{errors}) {
2024         warn "$prefix - errors in rule parameters: $orig_line\n";
2025         foreach my $p (keys %{$rule->{errors}}) {
2026             warn "  $p: $rule->{errors}->{$p}\n";
2027         }
2028     }
2029
2030     return $rule;
2031 }
2032
2033 sub parse_vmfw_option {
2034     my ($line) = @_;
2035
2036     my ($opt, $value);
2037
2038     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2039
2040     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2041         $opt = lc($1);
2042         $value = int($2);
2043     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2044         $opt = lc($1);
2045         $value = $2 ? lc($3) : '';
2046     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2047         $opt = lc($1);
2048         $value = uc($3);
2049     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2050         $opt = lc($1);
2051         $value = $2;
2052     } else {
2053         chomp $line;
2054         die "can't parse option '$line'\n"
2055     }
2056
2057     return ($opt, $value);
2058 }
2059
2060 sub parse_hostfw_option {
2061     my ($line) = @_;
2062
2063     my ($opt, $value);
2064
2065     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2066
2067     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2068         $opt = lc($1);
2069         $value = int($2);
2070     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2071         $opt = lc($1);
2072         $value = $2 ? lc($3) : '';
2073     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2074         $opt = lc($1);
2075         $value = int($2);
2076     } else {
2077         chomp $line;
2078         die "can't parse option '$line'\n"
2079     }
2080
2081     return ($opt, $value);
2082 }
2083
2084 sub parse_clusterfw_option {
2085     my ($line) = @_;
2086
2087     my ($opt, $value);
2088
2089     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2090         $opt = lc($1);
2091         $value = int($2);
2092     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2093         $opt = lc($1);
2094         $value = uc($3);
2095     } else {
2096         chomp $line;
2097         die "can't parse option '$line'\n"
2098     }
2099
2100     return ($opt, $value);
2101 }
2102
2103 sub parse_alias {
2104     my ($line) = @_;
2105
2106     # we can add single line comments to the end of the line
2107     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2108
2109     if ($line =~ m/^(\S+)\s(\S+)$/) {
2110         my ($name, $cidr) = ($1, $2);
2111         $cidr =~ s|/32$||;
2112         pve_verify_ipv4_or_cidr($cidr);
2113         my $data = {
2114             name => $name,
2115             cidr => $cidr,
2116         };
2117         $data->{comment} = $comment  if $comment;
2118         return $data;
2119     }
2120
2121     return undef;
2122 }
2123
2124 sub generic_fw_rules_parser {
2125     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2126
2127     my $section;
2128     my $group;
2129
2130     my $res = $empty_conf;
2131
2132     while (defined(my $line = <$fh>)) {
2133         next if $line =~ m/^#/;
2134         next if $line =~ m/^\s*$/;
2135
2136         my $linenr = $fh->input_line_number();
2137         my $prefix = "$filename (line $linenr)";
2138
2139         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2140             $section = 'options';
2141             next;
2142         }
2143
2144         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2145             $section = 'aliases';
2146             next;
2147         }
2148
2149         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2150             $section = 'groups';
2151             $group = lc($1);
2152             my $comment = $2;
2153             $res->{$section}->{$group} = [];
2154             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2155                 if $comment;
2156             next;
2157         }
2158
2159         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2160             $section = 'rules';
2161             next;
2162         }
2163
2164         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2165             $section = 'ipset';
2166             $group = lc($1);
2167             my $comment = $2;
2168             $res->{$section}->{$group} = [];
2169             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2170                 if $comment;
2171             next;
2172         }
2173
2174         if (!$section) {
2175             warn "$prefix: skip line - no section\n";
2176             next;
2177         }
2178
2179         if ($section eq 'options') {
2180             eval {
2181                 my ($opt, $value);
2182                 if ($rule_env eq 'cluster') {
2183                     ($opt, $value) = parse_clusterfw_option($line);
2184                 } elsif ($rule_env eq 'host') {
2185                     ($opt, $value) = parse_hostfw_option($line);
2186                 } else {
2187                     ($opt, $value) = parse_vmfw_option($line);
2188                 }
2189                 $res->{options}->{$opt} = $value;
2190             };
2191             warn "$prefix: $@" if $@;
2192         } elsif ($section eq 'aliases') {
2193             eval {
2194                 my $data = parse_alias($line);
2195                 $res->{aliases}->{lc($data->{name})} = $data;
2196             };
2197             warn "$prefix: $@" if $@;
2198         } elsif ($section eq 'rules') {
2199             my $rule;
2200             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2201             if (my $err = $@) {
2202                 warn "$prefix: $err";
2203                 next;
2204             }
2205             push @{$res->{$section}}, $rule;
2206         } elsif ($section eq 'groups') {
2207             my $rule;
2208             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2209             if (my $err = $@) {
2210                 warn "$prefix: $err";
2211                 next;
2212             }
2213             push @{$res->{$section}->{$group}}, $rule;
2214         } elsif ($section eq 'ipset') {
2215             # we can add single line comments to the end of the rule
2216             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2217
2218             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2219             my $nomatch = $1;
2220             my $cidr = $2;
2221
2222             if($cidr !~ m/^${ip_alias_pattern}$/) {
2223                 $cidr =~ s|/32$||;
2224
2225                 eval { pve_verify_ipv4_or_cidr($cidr); };
2226                 if (my $err = $@) {
2227                     warn "$prefix: $cidr - $err";
2228                     next;
2229                 }
2230             }
2231
2232             my $entry = { cidr => $cidr };
2233             $entry->{nomatch} = 1 if $nomatch;
2234             $entry->{comment} = $comment if $comment;
2235
2236             push @{$res->{$section}->{$group}}, $entry;
2237         } else {
2238             warn "$prefix: skip line - unknown section\n";
2239             next;
2240         }
2241     }
2242
2243     return $res;
2244 }
2245
2246 sub parse_host_fw_rules {
2247     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2248
2249     my $empty_conf = { rules => [], options => {}};
2250
2251     return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2252 }
2253
2254 sub parse_vm_fw_rules {
2255     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2256
2257     my $empty_conf = {
2258         rules => [],
2259         options => {},
2260         aliases => {},
2261         ipset => {} ,
2262         ipset_comments => {},
2263     };
2264
2265     return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2266 }
2267
2268 sub parse_cluster_fw_rules {
2269     my ($filename, $fh, $verbose) = @_;
2270
2271     my $section;
2272     my $group;
2273
2274     my $empty_conf = {
2275         rules => [],
2276         options => {},
2277         aliases => {},
2278         groups => {},
2279         group_comments => {},
2280         ipset => {} ,
2281         ipset_comments => {},
2282     };
2283
2284     return generic_fw_rules_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2285 }
2286
2287 sub run_locked {
2288     my ($code, @param) = @_;
2289
2290     my $timeout = 10;
2291
2292     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2293
2294     die $@ if $@;
2295
2296     return $res;
2297 }
2298
2299 sub read_local_vm_config {
2300
2301     my $openvz = {};
2302     my $qemu = {};
2303
2304     my $vmdata = { openvz => $openvz, qemu => $qemu };
2305
2306     my $vmlist = PVE::Cluster::get_vmlist();
2307     return $vmdata if !$vmlist || !$vmlist->{ids};
2308     my $ids = $vmlist->{ids};
2309
2310     foreach my $vmid (keys %$ids) {
2311         next if !$vmid; # skip VE0
2312         my $d = $ids->{$vmid};
2313         next if !$d->{node} || $d->{node} ne $nodename;
2314         next if !$d->{type};
2315         if ($d->{type} eq 'openvz') {
2316             if ($have_pve_manager) {
2317                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2318                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2319                     $openvz->{$vmid} = $conf;
2320                 }
2321             }
2322         } elsif ($d->{type} eq 'qemu') {
2323             if ($have_qemu_server) {
2324                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2325                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2326                     $qemu->{$vmid} = $conf;
2327                 }
2328             }
2329         }
2330     }
2331
2332     return $vmdata;
2333 };
2334
2335 sub load_vmfw_conf {
2336     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2337
2338     my $vmfw_conf = {};
2339
2340     $dir = "/etc/pve/firewall" if !defined($dir);
2341
2342     my $filename = "$dir/$vmid.fw";
2343     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2344         $vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
2345         $vmfw_conf->{vmid} = $vmid;
2346     }
2347
2348     return $vmfw_conf;
2349 }
2350
2351 my $format_rules = sub {
2352     my ($rules, $allow_iface) = @_;
2353
2354     my $raw = '';
2355
2356     foreach my $rule (@$rules) {
2357         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2358             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2359             $raw .= uc($rule->{type});
2360             if ($rule->{macro}) {
2361                 $raw .= " $rule->{macro}($rule->{action})";
2362             } else {
2363                 $raw .= " " . $rule->{action};
2364             }
2365             if ($allow_iface && $rule->{iface}) {
2366                 $raw .= " -i $rule->{iface}";
2367             }
2368
2369             if ($rule->{type} ne  'group')  {
2370                 $raw .= " -source $rule->{source}" if $rule->{source};
2371                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2372                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2373                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2374                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2375             }
2376
2377             $raw .= " # " . encode('utf8', $rule->{comment})
2378                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2379             $raw .= "\n";
2380         } else {
2381             die "unknown rule type '$rule->{type}'";
2382         }
2383     }
2384
2385     return $raw;
2386 };
2387
2388 my $format_options = sub {
2389     my ($options) = @_;
2390
2391     my $raw = '';
2392
2393     $raw .= "[OPTIONS]\n\n";
2394     foreach my $opt (keys %$options) {
2395         $raw .= "$opt: $options->{$opt}\n";
2396     }
2397     $raw .= "\n";
2398
2399     return $raw;
2400 };
2401
2402 my $format_aliases = sub {
2403     my ($aliases) = @_;
2404
2405     my $raw = '';
2406
2407     $raw .= "[ALIASES]\n\n";
2408     foreach my $k (keys %$aliases) {
2409         my $e = $aliases->{$k};
2410         $raw .= "$e->{name} $e->{cidr}";
2411         $raw .= " # " . encode('utf8', $e->{comment})
2412             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2413         $raw .= "\n";
2414     }
2415     $raw .= "\n";
2416
2417     return $raw;
2418 };
2419
2420 my $format_ipsets = sub {
2421     my ($fw_conf) = @_;
2422
2423     my $raw = '';
2424
2425     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2426         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2427             my $utf8comment = encode('utf8', $comment);
2428             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2429         } else {
2430             $raw .= "[IPSET $ipset]\n\n";
2431         }
2432         my $options = $fw_conf->{ipset}->{$ipset};
2433
2434         my $nethash = {};
2435         foreach my $entry (@$options) {
2436             $nethash->{$entry->{cidr}} = $entry;
2437         }
2438
2439         foreach my $cidr (sort keys %$nethash) {
2440             my $entry = $nethash->{$cidr};
2441             my $line = $entry->{nomatch} ? '!' : '';
2442             $line .= $entry->{cidr};
2443             $line .= " # " . encode('utf8', $entry->{comment})
2444                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2445             $raw .= "$line\n";
2446         }
2447
2448         $raw .= "\n";
2449     }
2450
2451     return $raw;
2452 };
2453
2454 sub save_vmfw_conf {
2455     my ($vmid, $vmfw_conf) = @_;
2456
2457     my $raw = '';
2458
2459     my $options = $vmfw_conf->{options};
2460     $raw .= &$format_options($options) if scalar(keys %$options);
2461
2462     my $aliases = $vmfw_conf->{aliases};
2463     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2464
2465     $raw .= &$format_ipsets($vmfw_conf);
2466
2467     my $rules = $vmfw_conf->{rules} || [];
2468     if (scalar(@$rules)) {
2469         $raw .= "[RULES]\n\n";
2470         $raw .= &$format_rules($rules, 1);
2471         $raw .= "\n";
2472     }
2473
2474     my $filename = "/etc/pve/firewall/$vmid.fw";
2475     PVE::Tools::file_set_contents($filename, $raw);
2476 }
2477
2478 sub read_vm_firewall_configs {
2479     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2480
2481     my $vmfw_configs = {};
2482
2483     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2484         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2485         next if !$vmfw_conf->{options}; # skip if file does not exists
2486         $vmfw_configs->{$vmid} = $vmfw_conf;
2487     }
2488     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2489         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2490         next if !$vmfw_conf->{options}; # skip if file does not exists
2491         $vmfw_configs->{$vmid} = $vmfw_conf;
2492     }
2493
2494     return $vmfw_configs;
2495 }
2496
2497 sub get_option_log_level {
2498     my ($options, $k) = @_;
2499
2500     my $v = $options->{$k};
2501     $v = $default_log_level if !defined($v);
2502
2503     return undef if $v eq '' || $v eq 'nolog';
2504
2505     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2506
2507     return $v if ($v >= 0) && ($v <= 7);
2508
2509     warn "unknown log level ($k = '$v')\n";
2510
2511     return undef;
2512 }
2513
2514 sub generate_std_chains {
2515     my ($ruleset, $options) = @_;
2516
2517     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2518
2519     # same as shorewall smurflog.
2520     my $chain = 'PVEFW-smurflog';
2521     $pve_std_chains->{$chain} = [];
2522
2523     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2524     push @{$pve_std_chains->{$chain}}, "-j DROP";
2525
2526     # same as shorewall logflags action.
2527     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2528     $chain = 'PVEFW-logflags';
2529     $pve_std_chains->{$chain} = [];
2530
2531     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2532     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2533     push @{$pve_std_chains->{$chain}}, "-j DROP";
2534
2535     foreach my $chain (keys %$pve_std_chains) {
2536         ruleset_create_chain($ruleset, $chain);
2537         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2538             if (ref($rule)) {
2539                 ruleset_generate_rule($ruleset, $chain, $rule);
2540             } else {
2541                 ruleset_addrule($ruleset, $chain, $rule);
2542             }
2543         }
2544     }
2545 }
2546
2547 sub generate_ipset_chains {
2548     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2549
2550     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2551         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2552         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2553     }
2554 }
2555
2556 sub generate_ipset {
2557     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2558
2559     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2560
2561     my $hashsize = scalar(@$options);
2562     if ($hashsize <= 64) {
2563         $hashsize = 64;
2564     } else {
2565         $hashsize = round_powerof2($hashsize);
2566     }
2567
2568     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2569
2570     # remove duplicates
2571     my $nethash = {};
2572     foreach my $entry (@$options) {
2573         my $cidr = $entry->{cidr};
2574         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2575             my $alias = lc($cidr);
2576             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2577             $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2578             if ($e) {
2579                 $entry->{cidr} = $e->{cidr};
2580                 $nethash->{$entry->{cidr}} = $entry;
2581             } else {
2582                 warn "no such alias '$cidr'\n";
2583             }
2584         } else {
2585             $nethash->{$entry->{cidr}} = $entry;
2586         }
2587     }
2588
2589     foreach my $cidr (sort keys %$nethash) {
2590         my $entry = $nethash->{$cidr};
2591
2592         my $cmd = "add $name $cidr";
2593         if ($entry->{nomatch}) {
2594             if ($feature_ipset_nomatch) {
2595                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2596             } else {
2597                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2598             }
2599         } else {
2600             push @{$ipset_ruleset->{$name}}, $cmd;
2601         }
2602     }
2603 }
2604
2605 sub round_powerof2 {
2606     my ($int) = @_;
2607
2608     $int--;
2609     $int |= $int >> $_ foreach (1,2,4,8,16);
2610     return ++$int;
2611 }
2612
2613 sub load_clusterfw_conf {
2614     my ($filename, $verbose) = @_;
2615
2616     $filename = $clusterfw_conf_filename if !defined($filename);
2617
2618     my $cluster_conf = {};
2619     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2620         $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
2621     }
2622
2623     return $cluster_conf;
2624 }
2625
2626 sub save_clusterfw_conf {
2627     my ($cluster_conf) = @_;
2628
2629     my $raw = '';
2630
2631     my $options = $cluster_conf->{options};
2632     $raw .= &$format_options($options) if scalar(keys %$options);
2633
2634     my $aliases = $cluster_conf->{aliases};
2635     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2636
2637     $raw .= &$format_ipsets($cluster_conf);
2638
2639     my $rules = $cluster_conf->{rules};
2640     if (scalar(@$rules)) {
2641         $raw .= "[RULES]\n\n";
2642         $raw .= &$format_rules($rules, 1);
2643         $raw .= "\n";
2644     }
2645
2646     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2647         my $rules = $cluster_conf->{groups}->{$group};
2648         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2649             my $utf8comment = encode('utf8', $comment);
2650             $raw .= "[group $group] # $utf8comment\n\n";
2651         } else {
2652             $raw .= "[group $group]\n\n";
2653         }
2654
2655         $raw .= &$format_rules($rules, 0);
2656         $raw .= "\n";
2657     }
2658
2659     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2660 }
2661
2662 sub load_hostfw_conf {
2663     my ($cluster_conf, $filename, $verbose) = @_;
2664
2665     $filename = $hostfw_conf_filename if !defined($filename);
2666
2667     my $hostfw_conf = {};
2668     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2669         $hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
2670     }
2671     return $hostfw_conf;
2672 }
2673
2674 sub save_hostfw_conf {
2675     my ($hostfw_conf) = @_;
2676
2677     my $raw = '';
2678
2679     my $options = $hostfw_conf->{options};
2680     $raw .= &$format_options($options) if scalar(keys %$options);
2681
2682     my $rules = $hostfw_conf->{rules};
2683     if (scalar(@$rules)) {
2684         $raw .= "[RULES]\n\n";
2685         $raw .= &$format_rules($rules, 1);
2686         $raw .= "\n";
2687     }
2688
2689     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2690 }
2691
2692 sub compile {
2693     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2694
2695     my $vmfw_configs;
2696
2697     if ($vmdata) { # test mode
2698         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2699         my $filename = "$testdir/cluster.fw";
2700         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2701
2702         $filename = "$testdir/host.fw";
2703         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2704
2705         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2706     } else { # normal operation
2707         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2708
2709         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2710
2711         $vmdata = read_local_vm_config();
2712         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2713     }
2714
2715     $cluster_conf->{ipset}->{venet0} = [];
2716     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2717
2718     my $localnet;
2719     if ($cluster_conf->{aliases}->{local_network}) {
2720         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2721     } else {
2722         $localnet = local_network() || '127.0.0.0/8';
2723         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2724     }
2725
2726     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2727
2728     my $ruleset = {};
2729
2730     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2731     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2732
2733     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2734
2735     my $hostfw_options = $hostfw_conf->{options} || {};
2736
2737     # fixme: what log level should we use here?
2738     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2739
2740     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2741
2742
2743     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2744     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2745     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2746
2747     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2748     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2749
2750     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2751
2752     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2753     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2754
2755     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2756     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2757
2758     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2759
2760     generate_std_chains($ruleset, $hostfw_options);
2761
2762     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2763
2764     my $ipset_ruleset = {};
2765
2766     if ($hostfw_enable) {
2767         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2768         warn $@ if $@; # just to be sure - should not happen
2769     }
2770
2771     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2772
2773     # generate firewall rules for QEMU VMs
2774     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2775         eval {
2776             my $conf = $vmdata->{qemu}->{$vmid};
2777             my $vmfw_conf = $vmfw_configs->{$vmid};
2778             return if !$vmfw_conf;
2779             return if !$vmfw_conf->{options}->{enable};
2780
2781             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2782
2783             foreach my $netid (keys %$conf) {
2784                 next if $netid !~ m/^net(\d+)$/;
2785                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2786                 next if !$net->{firewall};
2787                 my $iface = "tap${vmid}i$1";
2788
2789                 my $macaddr = $net->{macaddr};
2790                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2791                                              $vmfw_conf, $vmid, 'IN');
2792                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2793                                              $vmfw_conf, $vmid, 'OUT');
2794             }
2795         };
2796         warn $@ if $@; # just to be sure - should not happen
2797     }
2798
2799     # generate firewall rules for OpenVZ containers
2800     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2801         eval {
2802             my $conf = $vmdata->{openvz}->{$vmid};
2803
2804             my $vmfw_conf = $vmfw_configs->{$vmid};
2805             return if !$vmfw_conf;
2806             return if !$vmfw_conf->{options}->{enable};
2807
2808             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2809
2810             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2811                 my $ip = $conf->{ip_address}->{value};
2812                 $ip =~ s/\s+/,/g;
2813                 parse_address_list($ip); # make sure we have a valid $ip list
2814
2815                 my @ips = split(',', $ip);
2816
2817                 foreach my $singleip (@ips) {
2818                     my $venet0ipset = {};
2819                     $venet0ipset->{cidr} = $singleip;
2820                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2821                 }
2822
2823                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2824                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2825             }
2826
2827             if ($conf->{netif} && $conf->{netif}->{value}) {
2828                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2829                 foreach my $netid (keys %$netif) {
2830                     my $d = $netif->{$netid};
2831
2832                     my $macaddr = $d->{mac};
2833                     my $iface = $d->{host_ifname};
2834                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2835                                                  $vmfw_conf, $vmid, 'IN');
2836                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2837                                                  $vmfw_conf, $vmid, 'OUT');
2838                 }
2839             }
2840         };
2841         warn $@ if $@; # just to be sure - should not happen
2842     }
2843
2844     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2845         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2846     }
2847
2848     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2849
2850     return ($ruleset, $ipset_ruleset);
2851 }
2852
2853 sub get_ruleset_status {
2854     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2855
2856     my $statushash = {};
2857
2858     foreach my $chain (sort keys %$ruleset) {
2859         my $sig = &$digest_fn($ruleset->{$chain});
2860
2861         $statushash->{$chain}->{sig} = $sig;
2862
2863         my $oldsig = $active_chains->{$chain};
2864         if (!defined($oldsig)) {
2865             $statushash->{$chain}->{action} = 'create';
2866         } else {
2867             if ($oldsig eq $sig) {
2868                 $statushash->{$chain}->{action} = 'exists';
2869             } else {
2870                 $statushash->{$chain}->{action} = 'update';
2871             }
2872         }
2873         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2874         foreach my $cmd (@{$ruleset->{$chain}}) {
2875             print "\t$cmd\n" if $verbose;
2876         }
2877     }
2878
2879     foreach my $chain (sort keys %$active_chains) {
2880         if (!defined($ruleset->{$chain})) {
2881             my $sig = $active_chains->{$chain};
2882             $statushash->{$chain}->{action} = 'delete';
2883             $statushash->{$chain}->{sig} = $sig;
2884             print "delete $chain ($sig)\n" if $verbose;
2885         }
2886     }
2887
2888     return $statushash;
2889 }
2890
2891 sub print_sig_rule {
2892     my ($chain, $sig) = @_;
2893
2894     # We just use this to store a SHA1 checksum used to detect changes
2895     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2896 }
2897
2898 sub get_ruleset_cmdlist {
2899     my ($ruleset, $verbose) = @_;
2900
2901     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2902
2903     my ($active_chains, $hooks) = iptables_get_chains();
2904     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2905
2906     # create missing chains first
2907     foreach my $chain (sort keys %$ruleset) {
2908         my $stat = $statushash->{$chain};
2909         die "internal error" if !$stat;
2910         next if $stat->{action} ne 'create';
2911
2912         $cmdlist .= ":$chain - [0:0]\n";
2913     }
2914
2915     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2916         if (!$hooks->{$h}) {
2917             $cmdlist .= "-A $h -j PVEFW-$h\n";
2918         }
2919     }
2920
2921     foreach my $chain (sort keys %$ruleset) {
2922         my $stat = $statushash->{$chain};
2923         die "internal error" if !$stat;
2924
2925         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2926             $cmdlist .= "-F $chain\n";
2927             foreach my $cmd (@{$ruleset->{$chain}}) {
2928                 $cmdlist .= "$cmd\n";
2929             }
2930             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2931         } elsif ($stat->{action} eq 'delete') {
2932             die "internal error"; # this should not happen
2933         } elsif ($stat->{action} eq 'exists') {
2934             # do nothing
2935         } else {
2936             die "internal error - unknown status '$stat->{action}'";
2937         }
2938     }
2939
2940     foreach my $chain (keys %$statushash) {
2941         next if $statushash->{$chain}->{action} ne 'delete';
2942         $cmdlist .= "-F $chain\n";
2943     }
2944     foreach my $chain (keys %$statushash) {
2945         next if $statushash->{$chain}->{action} ne 'delete';
2946         next if $chain eq 'PVEFW-INPUT';
2947         next if $chain eq 'PVEFW-OUTPUT';
2948         next if $chain eq 'PVEFW-FORWARD';
2949         $cmdlist .= "-X $chain\n";
2950     }
2951
2952     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2953
2954     $cmdlist .= "COMMIT\n";
2955
2956     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2957 }
2958
2959 sub get_ipset_cmdlist {
2960     my ($ruleset, $verbose) = @_;
2961
2962     my $cmdlist = "";
2963
2964     my $delete_cmdlist = "";
2965
2966     my $active_chains = ipset_get_chains();
2967     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2968
2969     # remove stale _swap chains
2970     foreach my $chain (keys %$active_chains) {
2971         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2972             $cmdlist .= "destroy $chain\n";
2973         }
2974     }
2975
2976     foreach my $chain (sort keys %$ruleset) {
2977         my $stat = $statushash->{$chain};
2978         die "internal error" if !$stat;
2979
2980         if ($stat->{action} eq 'create') {
2981             foreach my $cmd (@{$ruleset->{$chain}}) {
2982                 $cmdlist .= "$cmd\n";
2983             }
2984         }
2985
2986         if ($stat->{action} eq 'update') {
2987             my $chain_swap = $chain."_swap";
2988
2989             foreach my $cmd (@{$ruleset->{$chain}}) {
2990                 $cmd =~ s/$chain/$chain_swap/;
2991                 $cmdlist .= "$cmd\n";
2992             }
2993             $cmdlist .= "swap $chain_swap $chain\n";
2994             $cmdlist .= "flush $chain_swap\n";
2995             $cmdlist .= "destroy $chain_swap\n";
2996         }
2997
2998     }
2999
3000     foreach my $chain (keys %$statushash) {
3001         next if $statushash->{$chain}->{action} ne 'delete';
3002
3003         $delete_cmdlist .= "flush $chain\n";
3004         $delete_cmdlist .= "destroy $chain\n";
3005     }
3006
3007     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3008
3009     return ($cmdlist, $delete_cmdlist, $changes);
3010 }
3011
3012 sub apply_ruleset {
3013     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3014
3015     enable_bridge_firewall();
3016
3017     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3018         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3019
3020     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3021
3022     if ($verbose) {
3023         if ($ipset_changes) {
3024             print "ipset changes:\n";
3025             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3026             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3027         }
3028
3029         if ($changes) {
3030             print "iptables changes:\n";
3031             print $cmdlist;
3032         }
3033     }
3034
3035     ipset_restore_cmdlist($ipset_create_cmdlist);
3036
3037     iptables_restore_cmdlist($cmdlist);
3038
3039     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3040
3041     # test: re-read status and check if everything is up to date
3042     my $active_chains = iptables_get_chains();
3043     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3044
3045     my $errors;
3046     foreach my $chain (sort keys %$ruleset) {
3047         my $stat = $statushash->{$chain};
3048         if ($stat->{action} ne 'exists') {
3049             warn "unable to update chain '$chain'\n";
3050             $errors = 1;
3051         }
3052     }
3053
3054     die "unable to apply firewall changes\n" if $errors;
3055
3056     update_nf_conntrack_max($hostfw_conf);
3057
3058     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3059
3060 }
3061
3062 sub update_nf_conntrack_max {
3063     my ($hostfw_conf) = @_;
3064
3065     my $max = 65536; # reasonable default
3066
3067     my $options = $hostfw_conf->{options} || {};
3068
3069     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3070         $max = $options->{nf_conntrack_max};
3071         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3072     }
3073
3074     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3075     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3076
3077     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3078
3079     if ($current != $max) {
3080         my $hashsize = int($max/4);
3081         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3082         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3083     }
3084 }
3085
3086 sub update_nf_conntrack_tcp_timeout_established {
3087     my ($hostfw_conf) = @_;
3088
3089     my $options = $hostfw_conf->{options} || {};
3090
3091     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3092
3093     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3094 }
3095
3096 sub remove_pvefw_chains {
3097
3098     my ($chash, $hooks) = iptables_get_chains();
3099     my $cmdlist = "*filter\n";
3100
3101     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3102         if ($hooks->{$h}) {
3103             $cmdlist .= "-D $h -j PVEFW-$h\n";
3104         }
3105     }
3106
3107     foreach my $chain (keys %$chash) {
3108         $cmdlist .= "-F $chain\n";
3109     }
3110
3111     foreach my $chain (keys %$chash) {
3112         $cmdlist .= "-X $chain\n";
3113     }
3114     $cmdlist .= "COMMIT\n";
3115
3116     iptables_restore_cmdlist($cmdlist);
3117 }
3118
3119 sub init {
3120     my $cluster_conf = load_clusterfw_conf();
3121     my $cluster_options = $cluster_conf->{options};
3122     my $enable = $cluster_options->{enable};
3123
3124     return if !$enable;
3125
3126     # load required modules here
3127 }
3128
3129 sub update {
3130     my $code = sub {
3131
3132         my $cluster_conf = load_clusterfw_conf();
3133         my $cluster_options = $cluster_conf->{options};
3134
3135         my $enable = $cluster_options->{enable};
3136
3137         die "Firewall is disabled - cannot start\n" if !$enable;
3138
3139         if (!$enable) {
3140             PVE::Firewall::remove_pvefw_chains();
3141             return;
3142         }
3143
3144         my $hostfw_conf = load_hostfw_conf();
3145
3146         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3147
3148         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3149     };
3150
3151     run_locked($code);
3152 }
3153
3154 1;