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 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'nolog'; # avoid logs by default
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162     ],
 163     'DNS' => [
 164         "Domain Name System traffic (upd and tcp)",
 165         { action => 'PARAM', proto => 'udp', dport => '53' },
 166         { action => 'PARAM', proto => 'tcp', dport => '53' },
 167     ],
 168     'Distcc' => [
 169         "Distributed Compiler service",
 170         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 171     ],
 172     'FTP' => [
 173         "File Transfer Protocol",
 174         { action => 'PARAM', proto => 'tcp', dport => '21' },
 175     ],
 176     'Finger' => [
 177         "Finger protocol (RFC 742)",
 178         { action => 'PARAM', proto => 'tcp', dport => '79' },
 179     ],
 180     'GNUnet' => [
 181         "GNUnet secure peer-to-peer networking traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 183         { action => 'PARAM', proto => 'udp', dport => '2086' },
 184         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 185         { action => 'PARAM', proto => 'udp', dport => '1080' },
 186     ],
 187     'GRE' => [
 188         "Generic Routing Encapsulation tunneling protocol",
 189         { action => 'PARAM', proto => '47' },
 190     ],
 191     'Git' => [
 192         "Git distributed revision control traffic",
 193         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 194     ],
 195     'HKP' => [
 196         "OpenPGP HTTP keyserver protocol traffic",
 197         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 198     ],
 199     'HTTP' => [
 200         "Hypertext Transfer Protocol (WWW)",
 201         { action => 'PARAM', proto => 'tcp', dport => '80' },
 202     ],
 203     'HTTPS' => [
 204         "Hypertext Transfer Protocol (WWW) over SSL",
 205         { action => 'PARAM', proto => 'tcp', dport => '443' },
 206     ],
 207     'ICPV2' => [
 208         "Internet Cache Protocol V2 (Squid) traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '3130' },
 210     ],
 211     'ICQ' => [
 212         "AOL Instant Messenger traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 214     ],
 215     'IMAP' => [
 216         "Internet Message Access Protocol",
 217         { action => 'PARAM', proto => 'tcp', dport => '143' },
 218     ],
 219     'IMAPS' => [
 220         "Internet Message Access Protocol over SSL",
 221         { action => 'PARAM', proto => 'tcp', dport => '993' },
 222     ],
 223     'IPIP' => [
 224         "IPIP capsulation traffic",
 225         { action => 'PARAM', proto => '94' },
 226     ],
 227     'IPsec' => [
 228         "IPsec traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 230         { action => 'PARAM', proto => '50' },
 231     ],
 232     'IPsecah' => [
 233         "IPsec authentication (AH) traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', proto => '51' },
 236     ],
 237     'IPsecnat' => [
 238         "IPsec traffic and Nat-Traversal",
 239         { action => 'PARAM', proto => 'udp', dport => '500' },
 240         { action => 'PARAM', proto => 'udp', dport => '4500' },
 241         { action => 'PARAM', proto => '50' },
 242     ],
 243     'IRC' => [
 244         "Internet Relay Chat traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 246     ],
 247     'Jetdirect' => [
 248         "HP Jetdirect printing",
 249         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 250     ],
 251     'L2TP' => [
 252         "Layer 2 Tunneling Protocol traffic",
 253         { action => 'PARAM', proto => 'udp', dport => '1701' },
 254     ],
 255     'LDAP' => [
 256         "Lightweight Directory Access Protocol traffic",
 257         { action => 'PARAM', proto => 'tcp', dport => '389' },
 258     ],
 259     'LDAPS' => [
 260         "Secure Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '636' },
 262     ],
 263     'MSNP' => [
 264         "Microsoft Notification Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 266     ],
 267     'MSSQL' => [
 268         "Microsoft SQL Server",
 269         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 270     ],
 271     'Mail' => [
 272         "Mail traffic (SMTP, SMTPS, Submission)",
 273         { action => 'PARAM', proto => 'tcp', dport => '25' },
 274         { action => 'PARAM', proto => 'tcp', dport => '465' },
 275         { action => 'PARAM', proto => 'tcp', dport => '587' },
 276     ],
 277     'Munin' => [
 278         "Munin networked resource monitoring traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 280     ],
 281     'MySQL' => [
 282         "MySQL server",
 283         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 284     ],
 285     'NNTP' => [
 286         "NNTP traffic (Usenet).",
 287         { action => 'PARAM', proto => 'tcp', dport => '119' },
 288     ],
 289     'NNTPS' => [
 290         "Encrypted NNTP traffic (Usenet)",
 291         { action => 'PARAM', proto => 'tcp', dport => '563' },
 292     ],
 293     'NTP' => [
 294         "Network Time Protocol (ntpd)",
 295         { action => 'PARAM', proto => 'udp', dport => '123' },
 296     ],
 297     'OSPF' => [
 298         "OSPF multicast traffic",
 299         { action => 'PARAM', proto => '89' },
 300     ],
 301     'OpenVPN' => [
 302         "OpenVPN traffic",
 303         { action => 'PARAM', proto => 'udp', dport => '1194' },
 304     ],
 305     'PCA' => [
 306         "Symantec PCAnywere (tm)",
 307         { action => 'PARAM', proto => 'udp', dport => '5632' },
 308         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 309     ],
 310     'POP3' => [
 311         "POP3 traffic",
 312         { action => 'PARAM', proto => 'tcp', dport => '110' },
 313     ],
 314     'POP3S' => [
 315         "Encrypted POP3 traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '995' },
 317     ],
 318     'PPtP' => [
 319         "Point-to-Point Tunneling Protocol",
 320         { action => 'PARAM', proto => '47' },
 321         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 322     ],
 323     'Ping' => [
 324         "ICMP echo request",
 325         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 326     ],
 327     'PostgreSQL' => [
 328         "PostgreSQL server",
 329         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 330     ],
 331     'Printer' => [
 332         "Line Printer protocol printing",
 333         { action => 'PARAM', proto => 'tcp', dport => '515' },
 334     ],
 335     'RDP' => [
 336         "Microsoft Remote Desktop Protocol traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 338     ],
 339     'RIP' => [
 340         "Routing Information Protocol (bidirectional)",
 341         { action => 'PARAM', proto => 'udp', dport => '520' },
 342     ],
 343     'RNDC' => [
 344         "BIND remote management protocol",
 345         { action => 'PARAM', proto => 'tcp', dport => '953' },
 346     ],
 347     'Razor' => [
 348         "Razor Antispam System",
 349         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 350     ],
 351     'Rdate' => [
 352         "Remote time retrieval (rdate)",
 353         { action => 'PARAM', proto => 'tcp', dport => '37' },
 354     ],
 355     'Rsync' => [
 356         "Rsync server",
 357         { action => 'PARAM', proto => 'tcp', dport => '873' },
 358     ],
 359     'SANE' => [
 360         "SANE network scanning",
 361         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 362     ],
 363     'SMB' => [
 364         "Microsoft SMB traffic",
 365         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 366         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 367         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 368         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 369     ],
 370     'SMBswat' => [
 371         "Samba Web Administration Tool",
 372         { action => 'PARAM', proto => 'tcp', dport => '901' },
 373     ],
 374     'SMTP' => [
 375         "Simple Mail Transfer Protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '25' },
 377     ],
 378     'SMTPS' => [
 379         "Encrypted Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '465' },
 381     ],
 382     'SNMP' => [
 383         "Simple Network Management Protocol",
 384         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 385         { action => 'PARAM', proto => 'tcp', dport => '161' },
 386     ],
 387     'SPAMD' => [
 388         "Spam Assassin SPAMD traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '783' },
 390     ],
 391     'SSH' => [
 392         "Secure shell traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '22' },
 394     ],
 395     'SVN' => [
 396         "Subversion server (svnserve)",
 397         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 398     ],
 399     'SixXS' => [
 400         "SixXS IPv6 Deployment and Tunnel Broker",
 401         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 402         { action => 'PARAM', proto => 'udp', dport => '3740' },
 403         { action => 'PARAM', proto => '41' },
 404         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 405     ],
 406     'Squid' => [
 407         "Squid web proxy traffic",
 408         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 409     ],
 410     'Submission' => [
 411         "Mail message submission traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '587' },
 413     ],
 414     'Syslog' => [
 415         "Syslog protocol (RFC 5424) traffic",
 416         { action => 'PARAM', proto => 'udp', dport => '514' },
 417         { action => 'PARAM', proto => 'tcp', dport => '514' },
 418     ],
 419     'TFTP' => [
 420         "Trivial File Transfer Protocol traffic",
 421         { action => 'PARAM', proto => 'udp', dport => '69' },
 422     ],
 423     'Telnet' => [
 424         "Telnet traffic",
 425         { action => 'PARAM', proto => 'tcp', dport => '23' },
 426     ],
 427     'Telnets' => [
 428         "Telnet over SSL",
 429         { action => 'PARAM', proto => 'tcp', dport => '992' },
 430     ],
 431     'Time' => [
 432         "RFC 868 Time protocol",
 433         { action => 'PARAM', proto => 'tcp', dport => '37' },
 434     ],
 435     'Trcrt' => [
 436         "Traceroute (for up to 30 hops) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 438         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 439     ],
 440     'VNC' => [
 441         "VNC traffic for VNC display's 0 - 99",
 442         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 443     ],
 444     'VNCL' => [
 445         "VNC traffic from Vncservers to Vncviewers in listen mode",
 446         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 447     ],
 448     'Web' => [
 449         "WWW traffic (HTTP and HTTPS)",
 450         { action => 'PARAM', proto => 'tcp', dport => '80' },
 451         { action => 'PARAM', proto => 'tcp', dport => '443' },
 452     ],
 453     'Webcache' => [
 454         "Web Cache/Proxy traffic (port 8080)",
 455         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 456     ],
 457     'Webmin' => [
 458         "Webmin traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 460     ],
 461     'Whois' => [
 462         "Whois (nicname, RFC 3912) traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '43' },
 464     ],
 465 };
 466
 467 my $pve_fw_parsed_macros;
 468 my $pve_fw_macro_descr;
 469 my $pve_fw_preferred_macro_names = {};
 470
 471 my $pve_std_chains = {
 472     'PVEFW-SET-ACCEPT-MARK' => [
 473         "-j MARK --set-mark 1",
 474     ],
 475     'PVEFW-DropBroadcast' => [
 476         # same as shorewall 'Broadcast'
 477         # simply DROP BROADCAST/MULTICAST/ANYCAST
 478         # we can use this to reduce logging
 479         { action => 'DROP', dsttype => 'BROADCAST' },
 480         { action => 'DROP', dsttype => 'MULTICAST' },
 481         { action => 'DROP', dsttype => 'ANYCAST' },
 482         { action => 'DROP', dest => '224.0.0.0/4' },
 483     ],
 484     'PVEFW-reject' => [
 485         # same as shorewall 'reject'
 486         { action => 'DROP', dsttype => 'BROADCAST' },
 487         { action => 'DROP', source => '224.0.0.0/4' },
 488         { action => 'DROP', proto => 'icmp' },
 489         "-p tcp -j REJECT --reject-with tcp-reset",
 490         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 491         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 492         "-j REJECT --reject-with icmp-host-prohibited",
 493     ],
 494     'PVEFW-Drop' => [
 495         # same as shorewall 'Drop', which is equal to DROP,
 496         # but REJECT/DROP some packages to reduce logging,
 497         # and ACCEPT critical ICMP types
 498         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 499         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 500         { action => 'PVEFW-DropBroadcast' },
 501         # ACCEPT critical ICMP types
 502         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 503         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 504         # Drop packets with INVALID state
 505         "-m conntrack --ctstate INVALID -j DROP",
 506         # Drop Microsoft SMB noise
 507         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 508         { action => 'DROP', proto => 'udp', dport => '137:139'},
 509         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 510         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 511         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 512         # Drop new/NotSyn traffic so that it doesn't get logged
 513         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 514         # Drop DNS replies
 515         { action => 'DROP', proto => 'udp', sport => 53 },
 516     ],
 517     'PVEFW-Reject' => [
 518         # same as shorewall 'Reject', which is equal to Reject,
 519         # but REJECT/DROP some packages to reduce logging,
 520         # and ACCEPT critical ICMP types
 521         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 522         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 523         { action => 'PVEFW-DropBroadcast' },
 524         # ACCEPT critical ICMP types
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 526         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 527         # Drop packets with INVALID state
 528         "-m conntrack --ctstate INVALID -j DROP",
 529         # Drop Microsoft SMB noise
 530         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 531         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 532         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 533         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 534         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 535         # Drop new/NotSyn traffic so that it doesn't get logged
 536         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 537         # Drop DNS replies
 538         { action => 'DROP', proto => 'udp', sport => 53 },
 539     ],
 540     'PVEFW-tcpflags' => [
 541         # same as shorewall tcpflags action.
 542         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 543         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 544         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 545         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 546         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 547         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 548     ],
 549     'PVEFW-smurfs' => [
 550         # same as shorewall smurfs action
 551         # Filter packets for smurfs (packets with a broadcast address as the source).
 552         "-s 0.0.0.0/32 -j RETURN",
 553         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 554         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 555     ],
 556 };
 557
 558 # iptables -p icmp -h
 559 my $icmp_type_names = {
 560     any => 1,
 561     'echo-reply' => 1,
 562     'destination-unreachable' => 1,
 563     'network-unreachable' => 1,
 564     'host-unreachable' => 1,
 565     'protocol-unreachable' => 1,
 566     'port-unreachable' => 1,
 567     'fragmentation-needed' => 1,
 568     'source-route-failed' => 1,
 569     'network-unknown' => 1,
 570     'host-unknown' => 1,
 571     'network-prohibited' => 1,
 572     'host-prohibited' => 1,
 573     'TOS-network-unreachable' => 1,
 574     'TOS-host-unreachable' => 1,
 575     'communication-prohibited' => 1,
 576     'host-precedence-violation' => 1,
 577     'precedence-cutoff' => 1,
 578     'source-quench' => 1,
 579     'redirect' => 1,
 580     'network-redirect' => 1,
 581     'host-redirect' => 1,
 582     'TOS-network-redirect' => 1,
 583     'TOS-host-redirect' => 1,
 584     'echo-request' => 1,
 585     'router-advertisement' => 1,
 586     'router-solicitation' => 1,
 587     'time-exceeded' => 1,
 588     'ttl-zero-during-transit' => 1,
 589     'ttl-zero-during-reassembly' => 1,
 590     'parameter-problem' => 1,
 591     'ip-header-bad' => 1,
 592     'required-option-missing' => 1,
 593     'timestamp-request' => 1,
 594     'timestamp-reply' => 1,
 595     'address-mask-request' => 1,
 596     'address-mask-reply' => 1,
 597 };
 598
 599 sub init_firewall_macros {
 600
 601     $pve_fw_parsed_macros = {};
 602
 603     foreach my $k (keys %$pve_fw_macros) {
 604         my $lc_name = lc($k);
 605         my $macro = $pve_fw_macros->{$k};
 606         if (!ref($macro->[0])) {
 607             $pve_fw_macro_descr->{$k} = shift @$macro;
 608         }
 609         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 610         $pve_fw_parsed_macros->{$k} = $macro;
 611     }
 612 }
 613
 614 init_firewall_macros();
 615
 616 sub get_macros {
 617     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 618 }
 619
 620 my $etc_services;
 621
 622 sub get_etc_services {
 623
 624     return $etc_services if $etc_services;
 625
 626     my $filename = "/etc/services";
 627
 628     my $fh = IO::File->new($filename, O_RDONLY);
 629     if (!$fh) {
 630         warn "unable to read '$filename' - $!\n";
 631         return {};
 632     }
 633
 634     my $services = {};
 635
 636     while (my $line = <$fh>) {
 637         chomp ($line);
 638         next if $line =~m/^#/;
 639         next if ($line =~m/^\s*$/);
 640
 641         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 642             $services->{byid}->{$2}->{name} = $1;
 643             $services->{byid}->{$2}->{port} = $2;
 644             $services->{byid}->{$2}->{$3} = 1;
 645             $services->{byname}->{$1} = $services->{byid}->{$2};
 646         }
 647     }
 648
 649     close($fh);
 650
 651     $etc_services = $services;
 652
 653
 654     return $etc_services;
 655 }
 656
 657 my $etc_protocols;
 658
 659 sub get_etc_protocols {
 660     return $etc_protocols if $etc_protocols;
 661
 662     my $filename = "/etc/protocols";
 663
 664     my $fh = IO::File->new($filename, O_RDONLY);
 665     if (!$fh) {
 666         warn "unable to read '$filename' - $!\n";
 667         return {};
 668     }
 669
 670     my $protocols = {};
 671
 672     while (my $line = <$fh>) {
 673         chomp ($line);
 674         next if $line =~m/^#/;
 675         next if ($line =~m/^\s*$/);
 676
 677         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 678             $protocols->{byid}->{$2}->{name} = $1;
 679             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 680         }
 681     }
 682
 683     close($fh);
 684
 685     $etc_protocols = $protocols;
 686
 687     return $etc_protocols;
 688 }
 689
 690 my $ipv4_mask_hash_localnet = {
 691     '255.255.0.0' => 16,
 692     '255.255.128.0' => 17,
 693     '255.255.192.0' => 18,
 694     '255.255.224.0' => 19,
 695     '255.255.240.0' => 20,
 696     '255.255.248.0' => 21,
 697     '255.255.252.0' => 22,
 698     '255.255.254.0' => 23,
 699     '255.255.255.0' => 24,
 700     '255.255.255.128' => 25,
 701     '255.255.255.192' => 26,
 702     '255.255.255.224' => 27,
 703     '255.255.255.240' => 28,
 704     '255.255.255.248' => 29,
 705     '255.255.255.252' => 30,
 706 };
 707
 708 my $__local_network;
 709
 710 sub local_network {
 711     my ($new_value) = @_;
 712
 713     $__local_network = $new_value if defined($new_value);
 714
 715     return $__local_network if defined($__local_network);
 716
 717     eval {
 718         my $nodename = PVE::INotify::nodename();
 719
 720         my $ip = PVE::Cluster::remote_node_ip($nodename);
 721
 722         my $testip = Net::IP->new($ip);
 723
 724         my $routes = PVE::ProcFSTools::read_proc_net_route();
 725         foreach my $entry (@$routes) {
 726             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 727             next if !defined($mask);
 728             return if $mask eq '0.0.0.0';
 729             my $cidr = "$entry->{dest}/$mask";
 730             my $testnet = Net::IP->new($cidr);
 731             if ($testnet->overlaps($testip)) {
 732                 $__local_network = $cidr;
 733                 return;
 734             }
 735         }
 736     };
 737     warn $@ if $@;
 738
 739     return $__local_network;
 740 }
 741
 742 sub parse_address_list {
 743     my ($str) = @_;
 744
 745     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 746     return if $str =~ m/^${ip_alias_pattern}$/;
 747
 748     my $count = 0;
 749     my $iprange = 0;
 750     foreach my $elem (split(/,/, $str)) {
 751         $count++;
 752         if (!Net::IP->new($elem)) {
 753             my $err = Net::IP::Error();
 754             die "invalid IP address: $err\n";
 755         }
 756         $iprange = 1 if $elem =~ m/-/;
 757     }
 758
 759     die "you can use a range in a list\n" if $iprange && $count > 1;
 760 }
 761
 762 sub parse_port_name_number_or_range {
 763     my ($str) = @_;
 764
 765     my $services = PVE::Firewall::get_etc_services();
 766     my $count = 0;
 767     my $icmp_port = 0;
 768
 769     foreach my $item (split(/,/, $str)) {
 770         $count++;
 771         if ($item =~ m/^(\d+):(\d+)$/) {
 772             my ($port1, $port2) = ($1, $2);
 773             die "invalid port '$port1'\n" if $port1 > 65535;
 774             die "invalid port '$port2'\n" if $port2 > 65535;
 775         } elsif ($item =~ m/^(\d+)$/) {
 776             my $port = $1;
 777             die "invalid port '$port'\n" if $port > 65535;
 778         } else {
 779             if ($icmp_type_names->{$item}) {
 780                 $icmp_port = 1;
 781             } else {
 782                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 783             }
 784         }
 785     }
 786
 787     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 788
 789     return $count;
 790 }
 791
 792 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 793 sub pve_fw_verify_port_spec {
 794    my ($portstr) = @_;
 795
 796    parse_port_name_number_or_range($portstr);
 797
 798    return $portstr;
 799 }
 800
 801 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 802 sub pve_fw_verify_v4addr_spec {
 803    my ($list) = @_;
 804
 805    parse_address_list($list);
 806
 807    return $list;
 808 }
 809
 810 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 811 sub pve_fw_verify_protocol_spec {
 812    my ($proto) = @_;
 813
 814    my $protocols = get_etc_protocols();
 815
 816    die "unknown protocol '$proto'\n" if $proto &&
 817        !(defined($protocols->{byname}->{$proto}) ||
 818          defined($protocols->{byid}->{$proto}));
 819
 820    return $proto;
 821 }
 822
 823
 824 # helper function for API
 825
 826 sub copy_opject_with_digest {
 827     my ($object) = @_;
 828
 829     my $sha = Digest::SHA->new('sha1');
 830
 831     my $res = {};
 832     foreach my $k (sort keys %$object) {
 833         my $v = $object->{$k};
 834         next if !defined($v);
 835         $res->{$k} = $v;
 836         $sha->add($k, ':', $v, "\n");
 837     }
 838
 839     my $digest = $sha->hexdigest;
 840
 841     $res->{digest} = $digest;
 842
 843     return wantarray ? ($res, $digest) : $res;
 844 }
 845
 846 sub copy_list_with_digest {
 847     my ($list) = @_;
 848
 849     my $sha = Digest::SHA->new('sha1');
 850
 851     my $res = [];
 852     foreach my $entry (@$list) {
 853         my $data = {};
 854         foreach my $k (sort keys %$entry) {
 855             my $v = $entry->{$k};
 856             next if !defined($v);
 857             $data->{$k} = $v;
 858             # Note: digest ignores refs ($rule->{errors})
 859             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 860         }
 861         push @$res, $data;
 862     }
 863
 864     my $digest = $sha->hexdigest;
 865
 866     foreach my $entry (@$res) {
 867         $entry->{digest} = $digest;
 868     }
 869
 870     return wantarray ? ($res, $digest) : $res;
 871 }
 872
 873 my $rule_properties = {
 874     pos => {
 875         description => "Update rule at position <pos>.",
 876         type => 'integer',
 877         minimum => 0,
 878         optional => 1,
 879     },
 880     digest => get_standard_option('pve-config-digest'),
 881     type => {
 882         type => 'string',
 883         optional => 1,
 884         enum => ['in', 'out', 'group'],
 885     },
 886     action => {
 887         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 888         type => 'string',
 889         optional => 1,
 890         pattern => $security_group_name_pattern,
 891         maxLength => 20,
 892         minLength => 2,
 893     },
 894     macro => {
 895         type => 'string',
 896         optional => 1,
 897         maxLength => 128,
 898     },
 899     iface => get_standard_option('pve-iface', { optional => 1 }),
 900     source => {
 901         type => 'string', format => 'pve-fw-v4addr-spec',
 902         optional => 1,
 903     },
 904     dest => {
 905         type => 'string', format => 'pve-fw-v4addr-spec',
 906         optional => 1,
 907     },
 908     proto => {
 909         type => 'string', format => 'pve-fw-protocol-spec',
 910         optional => 1,
 911     },
 912     enable => {
 913         type => 'boolean',
 914         optional => 1,
 915     },
 916     sport => {
 917         type => 'string', format => 'pve-fw-port-spec',
 918         optional => 1,
 919     },
 920     dport => {
 921         type => 'string', format => 'pve-fw-port-spec',
 922         optional => 1,
 923     },
 924     comment => {
 925         type => 'string',
 926         optional => 1,
 927     },
 928 };
 929
 930 sub add_rule_properties {
 931     my ($properties) = @_;
 932
 933     foreach my $k (keys %$rule_properties) {
 934         my $h = $rule_properties->{$k};
 935         # copy data, so that we can modify later without side effects
 936         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 937     }
 938
 939     return $properties;
 940 }
 941
 942 sub delete_rule_properties {
 943     my ($rule, $delete_str) = @_;
 944
 945     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 946         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 947             if !defined($rule_properties->{$opt});
 948         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 949             if $opt eq 'type' || $opt eq 'action';
 950         delete $rule->{$opt};
 951     }
 952
 953     return $rule;
 954 }
 955
 956 my $apply_macro = sub {
 957     my ($macro_name, $param, $verify) = @_;
 958
 959     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 960     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 961
 962     my $rules = [];
 963
 964     foreach my $templ (@$macro_rules) {
 965         my $rule = {};
 966         my $param_used = {};
 967         foreach my $k (keys %$templ) {
 968             my $v = $templ->{$k};
 969             if ($v eq 'PARAM') {
 970                 $v = $param->{$k};
 971                 $param_used->{$k} = 1;
 972             } elsif ($v eq 'DEST') {
 973                 $v = $param->{dest};
 974                 $param_used->{dest} = 1;
 975             } elsif ($v eq 'SOURCE') {
 976                 $v = $param->{source};
 977                 $param_used->{source} = 1;
 978             }
 979
 980             if (!defined($v)) {
 981                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 982                 raise_param_exc({ macro => $msg }) if $verify;
 983                 die "$msg\n";
 984             }
 985             $rule->{$k} = $v;
 986         }
 987         foreach my $k (keys %$param) {
 988             next if $k eq 'macro';
 989             next if !defined($param->{$k});
 990             next if $param_used->{$k};
 991             if (defined($rule->{$k})) {
 992                 if ($rule->{$k} ne $param->{$k}) {
 993                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 994                     raise_param_exc({ $k => $msg }) if $verify;
 995                     die "$msg\n";
 996                 }
 997             } else {
 998                 $rule->{$k} = $param->{$k};
 999             }
1000         }
1001         push @$rules, $rule;
1002     }
1003
1004     return $rules;
1005 };
1006
1007 my $rule_env_iface_lookup = {
1008     'ct' => 1,
1009     'vm' => 1,
1010     'group' => 0,
1011     'cluster' => 1,
1012     'host' => 1,
1013 };
1014
1015 sub verify_rule {
1016     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1017
1018     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1019
1020     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1021     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1022
1023     my $errors = $rule->{errors} || {};
1024
1025     my $error_count = 0;
1026
1027     my $add_error = sub {
1028         my ($param, $msg)  = @_;
1029         chomp $msg;
1030         raise_param_exc({ $param => $msg }) if !$noerr;
1031         $error_count++;
1032         $errors->{$param} = $msg if !$errors->{$param};
1033     };
1034
1035     my $check_ipset_or_alias_property = sub {
1036         my ($name) = @_;
1037
1038         if (my $value = $rule->{$name}) {
1039             if ($value =~ m/^\+/) {
1040                 if ($value =~ m/^\+(${security_group_name_pattern})$/) {
1041                     &$add_error($name, "no such ipset '$1'")
1042                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1043
1044                 } else {
1045                     &$add_error($name, "invalid security group name '$value'");
1046                 }
1047             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1048                 my $alias = lc($value);
1049                 &$add_error($name, "no such alias '$value'")
1050                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1051             }
1052         }
1053     };
1054
1055     my $type = $rule->{type};
1056     my $action = $rule->{action};
1057
1058     &$add_error('type', "missing property") if !$type;
1059     &$add_error('action', "missing property") if !$action;
1060
1061     if ($type) {
1062         if ($type eq  'in' || $type eq 'out') {
1063             &$add_error('action', "unknown action '$action'")
1064                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1065         } elsif ($type eq 'group') {
1066             &$add_error('type', "security groups not allowed")
1067                 if !$allow_groups;
1068             &$add_error('action', "invalid characters in security group name")
1069                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1070         } else {
1071             &$add_error('type', "unknown rule type '$type'");
1072         }
1073     }
1074
1075     if ($rule->{iface}) {
1076         &$add_error('type', "parameter -i not allowed for this rule type")
1077             if !$allow_iface;
1078         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1079         &$add_error('iface', $@) if $@;
1080         if ($rule_env eq 'vm') {
1081             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1082                 if $rule->{iface} !~  m/^net(\d+)$/;
1083         } elsif ($rule_env eq 'ct') {
1084             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1085                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1086         }
1087     }
1088
1089     if ($rule->{macro}) {
1090         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1091             $rule->{macro} = $preferred_name;
1092         } else {
1093             &$add_error('macro', "unknown macro '$rule->{macro}'");
1094         }
1095     }
1096
1097     if ($rule->{proto}) {
1098         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1099         &$add_error('proto', $@) if $@;
1100     }
1101
1102     if ($rule->{dport}) {
1103         eval { parse_port_name_number_or_range($rule->{dport}); };
1104         &$add_error('dport', $@) if $@;
1105         &$add_error('proto', "missing property - 'dport' requires this property")
1106             if !$rule->{proto};
1107     }
1108
1109     if ($rule->{sport}) {
1110         eval { parse_port_name_number_or_range($rule->{sport}); };
1111         &$add_error('sport', $@) if $@;
1112         &$add_error('proto', "missing property - 'sport' requires this property")
1113             if !$rule->{proto};
1114     }
1115
1116     if ($rule->{source}) {
1117         eval { parse_address_list($rule->{source}); };
1118         &$add_error('source', $@) if $@;
1119         &$check_ipset_or_alias_property('source');
1120     }
1121
1122     if ($rule->{dest}) {
1123         eval { parse_address_list($rule->{dest}); };
1124         &$add_error('dest', $@) if $@;
1125         &$check_ipset_or_alias_property('dest');
1126     }
1127
1128     if ($rule->{macro} && !$error_count) {
1129         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1130         if (my $err = $@) {
1131             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1132                 my $eh = $err->{errors};
1133                 foreach my $p (keys %$eh) {
1134                     &$add_error($p, $eh->{$p});
1135                 }
1136             } else {
1137                 &$add_error('macro', "$err");
1138             }
1139         }
1140     }
1141
1142     $rule->{errors} = $errors if $error_count;
1143
1144     return $rule;
1145 }
1146
1147 sub copy_rule_data {
1148     my ($rule, $param) = @_;
1149
1150     foreach my $k (keys %$rule_properties) {
1151         if (defined(my $v = $param->{$k})) {
1152             if ($v eq '' || $v eq '-') {
1153                 delete $rule->{$k};
1154             } else {
1155                 $rule->{$k} = $v;
1156             }
1157         }
1158     }
1159
1160     return $rule;
1161 }
1162
1163 # core functions
1164 my $bridge_firewall_enabled = 0;
1165
1166 sub enable_bridge_firewall {
1167
1168     return if $bridge_firewall_enabled; # only once
1169
1170     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1171     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1172
1173     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1174     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1175
1176     $bridge_firewall_enabled = 1;
1177 }
1178
1179 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1180
1181 sub iptables_restore_cmdlist {
1182     my ($cmdlist) = @_;
1183
1184     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1185 }
1186
1187 sub ipset_restore_cmdlist {
1188     my ($cmdlist) = @_;
1189
1190     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1191 }
1192
1193 sub iptables_get_chains {
1194
1195     my $res = {};
1196
1197     # check what chains we want to track
1198     my $is_pvefw_chain = sub {
1199         my $name = shift;
1200
1201         return 1 if $name =~ m/^PVEFW-\S+$/;
1202
1203         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1204
1205         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1206
1207         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1208
1209         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1210         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1211
1212         return undef;
1213     };
1214
1215     my $table = '';
1216
1217     my $hooks = {};
1218
1219     my $parser = sub {
1220         my $line = shift;
1221
1222         return if $line =~ m/^#/;
1223         return if $line =~ m/^\s*$/;
1224
1225         if ($line =~ m/^\*(\S+)$/) {
1226             $table = $1;
1227             return;
1228         }
1229
1230         return if $table ne 'filter';
1231
1232         if ($line =~ m/^:(\S+)\s/) {
1233             my $chain = $1;
1234             return if !&$is_pvefw_chain($chain);
1235             $res->{$chain} = "unknown";
1236         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1237             my ($chain, $sig) = ($1, $2);
1238             return if !&$is_pvefw_chain($chain);
1239             $res->{$chain} = $sig;
1240         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1241             $hooks->{$1} = 1;
1242         } else {
1243             # simply ignore the rest
1244             return;
1245         }
1246     };
1247
1248     run_command("/sbin/iptables-save", outfunc => $parser);
1249
1250     return wantarray ? ($res, $hooks) : $res;
1251 }
1252
1253 sub iptables_chain_digest {
1254     my ($rules) = @_;
1255     my $digest = Digest::SHA->new('sha1');
1256     foreach my $rule (@$rules) { # order is important
1257         $digest->add($rule);
1258     }
1259     return $digest->b64digest;
1260 }
1261
1262 sub ipset_chain_digest {
1263     my ($rules) = @_;
1264
1265     my $digest = Digest::SHA->new('sha1');
1266     foreach my $rule (sort @$rules) { # note: sorted
1267         $digest->add($rule);
1268     }
1269     return $digest->b64digest;
1270 }
1271
1272 sub ipset_get_chains {
1273
1274     my $res = {};
1275     my $chains = {};
1276
1277     my $parser = sub {
1278         my $line = shift;
1279
1280         return if $line =~ m/^#/;
1281         return if $line =~ m/^\s*$/;
1282         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1283             my $chain = $1;
1284             $line =~ s/\s+$//; # delete trailing white space
1285             push @{$chains->{$chain}}, $line;
1286         } else {
1287             # simply ignore the rest
1288             return;
1289         }
1290     };
1291
1292     run_command("/usr/sbin/ipset save", outfunc => $parser);
1293
1294     # compute digest for each chain
1295     foreach my $chain (keys %$chains) {
1296         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1297     }
1298
1299     return $res;
1300 }
1301
1302 sub ruleset_generate_cmdstr {
1303     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1304
1305     return if defined($rule->{enable}) && !$rule->{enable};
1306     return if $rule->{errors};
1307
1308     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1309
1310     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1311     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1312
1313     my @cmd = ();
1314
1315     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1316     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1317
1318     my $source = $rule->{source};
1319     my $dest = $rule->{dest};
1320
1321     if ($source) {
1322         if ($source =~ m/^\+/) {
1323             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1324                 my $name = $1;
1325                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1326                     die "implement me";
1327                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1328                     push @cmd, "-m set --match-set PVEFW-$1 src";
1329                 } else {
1330                     die "no such ipset '$name'\n";
1331                 }
1332             } else {
1333                 die "invalid security group name '$source'\n";
1334             }
1335         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1336             my $alias = lc($source);
1337             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1338             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1339             die "no such alias '$source'\n" if !$e;
1340             push @cmd, "-s $e->{cidr}";
1341         } elsif ($source =~ m/\-/){
1342             push @cmd, "-m iprange --src-range $source";
1343         } else {
1344             push @cmd, "-s $source";
1345         }
1346     }
1347
1348     if ($dest) {
1349         if ($dest =~ m/^\+/) {
1350             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1351                 my $name = $1;
1352                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1353                     die "implement me";
1354                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1355                     push @cmd, "-m set --match-set PVEFW-$1 dst";
1356                 } else {
1357                     die "no such ipset '$name'\n";
1358                 }
1359             } else {
1360                 die "invalid security group name '$dest'\n";
1361             }
1362         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1363             my $alias = lc($dest);
1364             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1365             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1366             die "no such alias '$dest'\n" if !$e;
1367             push @cmd, "-d $e->{cidr}";
1368         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1369             push @cmd, "-m iprange --dst-range $dest";
1370         } else {
1371             push @cmd, "-d $dest";
1372         }
1373     }
1374
1375     if ($rule->{proto}) {
1376         push @cmd, "-p $rule->{proto}";
1377
1378         my $multiport = 0;
1379         $multiport++ if $nbdport > 1;
1380         $multiport++ if $nbsport > 1;
1381
1382         push @cmd, "--match multiport" if $multiport;
1383
1384         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1385             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1386
1387         if ($rule->{dport}) {
1388             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1389                 # Note: we use dport to store --icmp-type
1390                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1391                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1392             } else {
1393                 if ($nbdport > 1) {
1394                     if ($multiport == 2) {
1395                         push @cmd,  "--ports $rule->{dport}";
1396                     } else {
1397                         push @cmd, "--dports $rule->{dport}";
1398                     }
1399                 } else {
1400                     push @cmd, "--dport $rule->{dport}";
1401                 }
1402             }
1403         }
1404
1405         if ($rule->{sport}) {
1406             if ($nbsport > 1) {
1407                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1408             } else {
1409                 push @cmd, "--sport $rule->{sport}";
1410             }
1411         }
1412     } elsif ($rule->{dport} || $rule->{sport}) {
1413         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1414         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1415     }
1416
1417     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1418
1419     if (my $action = $rule->{action}) {
1420         $action = $actions->{$action} if defined($actions->{$action});
1421         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1422         push @cmd, $goto ? "-g $action" : "-j $action";
1423     }
1424
1425     return scalar(@cmd) ? join(' ', @cmd) : undef;
1426 }
1427
1428 sub ruleset_generate_rule {
1429     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1430
1431     my $rules;
1432
1433     if ($rule->{macro}) {
1434         $rules = &$apply_macro($rule->{macro}, $rule);
1435     } else {
1436         $rules = [ $rule ];
1437     }
1438
1439     # update all or nothing
1440
1441     my @cmds = ();
1442     foreach my $tmp (@$rules) {
1443         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1444             push @cmds, $cmdstr;
1445         }
1446     }
1447
1448     foreach my $cmdstr (@cmds) {
1449         ruleset_addrule($ruleset, $chain, $cmdstr);
1450     }
1451 }
1452
1453 sub ruleset_generate_rule_insert {
1454     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1455
1456     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1457
1458     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1459         ruleset_insertrule($ruleset, $chain, $cmdstr);
1460     }
1461 }
1462
1463 sub ruleset_create_chain {
1464     my ($ruleset, $chain) = @_;
1465
1466     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1467     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1468
1469     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1470
1471     $ruleset->{$chain} = [];
1472 }
1473
1474 sub ruleset_chain_exist {
1475     my ($ruleset, $chain) = @_;
1476
1477     return $ruleset->{$chain} ? 1 : undef;
1478 }
1479
1480 sub ruleset_addrule {
1481    my ($ruleset, $chain, $rule) = @_;
1482
1483    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1484
1485    push @{$ruleset->{$chain}}, "-A $chain $rule";
1486 }
1487
1488 sub ruleset_insertrule {
1489    my ($ruleset, $chain, $rule) = @_;
1490
1491    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1492
1493    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1494 }
1495
1496 sub get_log_rule_base {
1497     my ($chain, $vmid, $msg, $loglevel) = @_;
1498
1499     die "internal error - no log level" if !defined($loglevel);
1500
1501     $vmid = 0 if !defined($vmid);
1502
1503     # Note: we use special format for prefix to pass further
1504     # info to log daemon (VMID, LOGVELEL and CHAIN)
1505
1506     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1507 }
1508
1509 sub ruleset_addlog {
1510     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1511
1512     return if !defined($loglevel);
1513
1514     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1515
1516     $logrule = "$rule $logrule" if defined($rule);
1517
1518     ruleset_addrule($ruleset, $chain, $logrule);
1519 }
1520
1521 sub ruleset_add_chain_policy {
1522     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1523
1524     if ($policy eq 'ACCEPT') {
1525
1526         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1527                               { ACCEPT =>  $accept_action});
1528
1529     } elsif ($policy eq 'DROP') {
1530
1531         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1532
1533         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1534
1535         ruleset_addrule($ruleset, $chain, "-j DROP");
1536     } elsif ($policy eq 'REJECT') {
1537         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1538
1539         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1540
1541         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1542     } else {
1543         # should not happen
1544         die "internal error: unknown policy '$policy'";
1545     }
1546 }
1547
1548 sub ruleset_chain_add_conn_filters {
1549     my ($ruleset, $chain, $accept) = @_;
1550
1551     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1552     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1553 }
1554
1555 sub ruleset_chain_add_input_filters {
1556     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1557
1558     if ($cluster_conf->{ipset}->{blacklist}){
1559         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1560             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1561             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1562             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1563         }
1564         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j PVEFW-blacklist");
1565     }
1566
1567     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1568         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1569     }
1570
1571     if ($options->{tcpflags}) {
1572         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1573     }
1574 }
1575
1576 sub ruleset_create_vm_chain {
1577     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1578
1579     ruleset_create_chain($ruleset, $chain);
1580     my $accept = generate_nfqueue($options);
1581
1582     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1583         if ($direction eq 'OUT') {
1584             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1585                                                       proto => 'udp', sport => 68, dport => 67 });
1586         } else {
1587             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1588                                                       proto => 'udp', sport => 67, dport => 68 });
1589         }
1590     }
1591
1592     if ($direction eq 'OUT') {
1593         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1594             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1595         }
1596         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1597     }
1598 }
1599
1600 sub ruleset_add_group_rule {
1601     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1602
1603     my $group = $rule->{action};
1604     my $group_chain = "GROUP-$group-$direction";
1605     if(!ruleset_chain_exist($ruleset, $group_chain)){
1606         generate_group_rules($ruleset, $cluster_conf, $group);
1607     }
1608
1609     if ($direction eq 'OUT' && $rule->{iface_out}) {
1610         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1611     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1612         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1613     } else {
1614         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1615     }
1616
1617     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1618 }
1619
1620 sub ruleset_generate_vm_rules {
1621     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1622
1623     my $lc_direction = lc($direction);
1624
1625     my $in_accept = generate_nfqueue($options);
1626
1627     foreach my $rule (@$rules) {
1628         next if $rule->{iface} && $rule->{iface} ne $netid;
1629         next if !$rule->{enable} || $rule->{errors};
1630         if ($rule->{type} eq 'group') {
1631             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1632                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1633         } else {
1634             next if $rule->{type} ne $lc_direction;
1635             eval {
1636                 if ($direction eq 'OUT') {
1637                     ruleset_generate_rule($ruleset, $chain, $rule,
1638                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1639                                           undef, $cluster_conf, $vmfw_conf);
1640                 } else {
1641                     ruleset_generate_rule($ruleset, $chain, $rule,
1642                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1643                                           undef, $cluster_conf, $vmfw_conf);
1644                 }
1645             };
1646             warn $@ if $@;
1647         }
1648     }
1649 }
1650
1651 sub generate_nfqueue {
1652     my ($options) = @_;
1653
1654     if ($options->{ips}) {
1655         my $action = "NFQUEUE";
1656         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1657             if (defined($3) && defined($1)) {
1658                 $action .= " --queue-balance $1:$3";
1659             } elsif (defined($1)) {
1660                 $action .= " --queue-num $1";
1661             }
1662         }
1663         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1664         return $action;
1665     } else {
1666         return "ACCEPT";
1667     }
1668 }
1669
1670 sub ruleset_generate_vm_ipsrules {
1671     my ($ruleset, $options, $direction, $iface) = @_;
1672
1673     if ($options->{ips} && $direction eq 'IN') {
1674         my $nfqueue = generate_nfqueue($options);
1675
1676         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1677             ruleset_create_chain($ruleset, "PVEFW-IPS");
1678         }
1679
1680         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1681     }
1682 }
1683
1684 sub generate_venet_rules_direction {
1685     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1686
1687     my $lc_direction = lc($direction);
1688
1689     my $rules = $vmfw_conf->{rules};
1690
1691     my $options = $vmfw_conf->{options};
1692     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1693
1694     my $chain = "venet0-$vmid-$direction";
1695
1696     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1697
1698     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1699
1700     # implement policy
1701     my $policy;
1702
1703     if ($direction eq 'OUT') {
1704         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1705     } else {
1706         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1707     }
1708
1709     my $accept = generate_nfqueue($options);
1710     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1711     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1712
1713     if ($direction eq 'OUT') {
1714         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1715             action => $chain,
1716             source => $ip,
1717             iface_in => 'venet0'});
1718     } else {
1719         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1720             action => $chain,
1721             dest => $ip,
1722             iface_out => 'venet0'});
1723     }
1724 }
1725
1726 sub generate_tap_rules_direction {
1727     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1728
1729     my $lc_direction = lc($direction);
1730
1731     my $rules = $vmfw_conf->{rules};
1732
1733     my $options = $vmfw_conf->{options};
1734     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1735
1736     my $tapchain = "$iface-$direction";
1737
1738     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1739
1740     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1741
1742     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1743
1744     # implement policy
1745     my $policy;
1746
1747     if ($direction eq 'OUT') {
1748         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1749     } else {
1750         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1751     }
1752
1753     my $accept = generate_nfqueue($options);
1754     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1755     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1756
1757     # plug the tap chain to bridge chain
1758     if ($direction eq 'IN') {
1759         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1760                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1761     } else {
1762         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1763                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1764     }
1765 }
1766
1767 sub enable_host_firewall {
1768     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1769
1770     my $options = $hostfw_conf->{options};
1771     my $cluster_options = $cluster_conf->{options};
1772     my $rules = $hostfw_conf->{rules};
1773     my $cluster_rules = $cluster_conf->{rules};
1774
1775     # host inbound firewall
1776     my $chain = "PVEFW-HOST-IN";
1777     ruleset_create_chain($ruleset, $chain);
1778
1779     my $loglevel = get_option_log_level($options, "log_level_in");
1780
1781     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1782
1783     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1784     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1785
1786     # we use RETURN because we need to check also tap rules
1787     my $accept_action = 'RETURN';
1788
1789     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1790
1791     # add host rules first, so that cluster wide rules can be overwritten
1792     foreach my $rule (@$rules, @$cluster_rules) {
1793         next if !$rule->{enable} || $rule->{errors};
1794
1795         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1796
1797         eval {
1798             if ($rule->{type} eq 'group') {
1799                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1800             } elsif ($rule->{type} eq 'in') {
1801                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1802                                       undef, $cluster_conf, $hostfw_conf);
1803             }
1804         };
1805         warn $@ if $@;
1806         delete $rule->{iface_in};
1807     }
1808
1809     # allow standard traffic for management ipset (includes cluster network)
1810     my $mngmntsrc = "-m set --match-set PVEFW-management src";
1811     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1812     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1813     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1814     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1815
1816     my $localnet = local_network();
1817
1818     # corosync
1819     if ($localnet) {
1820         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1821         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1822         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1823     }
1824
1825     # implement input policy
1826     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1827     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1828
1829     # host outbound firewall
1830     $chain = "PVEFW-HOST-OUT";
1831     ruleset_create_chain($ruleset, $chain);
1832
1833     $loglevel = get_option_log_level($options, "log_level_out");
1834
1835     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1836
1837     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1838
1839     # we use RETURN because we may want to check other thigs later
1840     $accept_action = 'RETURN';
1841
1842     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1843
1844     # add host rules first, so that cluster wide rules can be overwritten
1845     foreach my $rule (@$rules, @$cluster_rules) {
1846         next if !$rule->{enable} || $rule->{errors};
1847
1848         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1849         eval {
1850             if ($rule->{type} eq 'group') {
1851                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1852             } elsif ($rule->{type} eq 'out') {
1853                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1854                                       undef, $cluster_conf, $hostfw_conf);
1855             }
1856         };
1857         warn $@ if $@;
1858         delete $rule->{iface_out};
1859     }
1860
1861     # allow standard traffic on cluster network
1862     if ($localnet) {
1863         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1864         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1865         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1866         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1867
1868         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1869         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1870         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1871     }
1872
1873     # implement output policy
1874     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1875     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1876
1877     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1878     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1879 }
1880
1881 sub generate_group_rules {
1882     my ($ruleset, $cluster_conf, $group) = @_;
1883
1884     my $rules = $cluster_conf->{groups}->{$group};
1885
1886     if (!$rules) {
1887         warn "no such security group '$group'\n";
1888         $rules = []; # create empty chain
1889     }
1890
1891     my $chain = "GROUP-${group}-IN";
1892
1893     ruleset_create_chain($ruleset, $chain);
1894     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1895
1896     foreach my $rule (@$rules) {
1897         next if $rule->{type} ne 'in';
1898         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1899     }
1900
1901     $chain = "GROUP-${group}-OUT";
1902
1903     ruleset_create_chain($ruleset, $chain);
1904     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1905
1906     foreach my $rule (@$rules) {
1907         next if $rule->{type} ne 'out';
1908         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1909         # check also other tap rules later
1910         ruleset_generate_rule($ruleset, $chain, $rule,
1911                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1912     }
1913 }
1914
1915 my $MAX_NETS = 32;
1916 my $valid_netdev_names = {};
1917 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1918     $valid_netdev_names->{"net$i"} = 1;
1919 }
1920
1921 sub parse_fw_rule {
1922     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1923
1924     chomp $line;
1925
1926     my $orig_line = $line;
1927
1928     my $rule = {};
1929
1930     # we can add single line comments to the end of the rule
1931     if ($line =~ s/#\s*(.*?)\s*$//) {
1932         $rule->{comment} = decode('utf8', $1);
1933     }
1934
1935     # we can disable a rule when prefixed with '|'
1936
1937     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1938
1939     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1940         die "unable to parse rule: $line\n";
1941
1942     $rule->{type} = lc($1);
1943     $rule->{action} = $2;
1944
1945     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1946         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1947             $rule->{macro} = $1;
1948             $rule->{action} = $2;
1949         }
1950     }
1951
1952     while (length($line)) {
1953         if ($line =~ s/^-i (\S+)\s*//) {
1954             $rule->{iface} = $1;
1955             next;
1956         }
1957
1958         last if $rule->{type} eq 'group';
1959
1960         if ($line =~ s/^-p (\S+)\s*//) {
1961             $rule->{proto} = $1;
1962             next;
1963         }
1964
1965         if ($line =~ s/^-dport (\S+)\s*//) {
1966             $rule->{dport} = $1;
1967             next;
1968         }
1969
1970         if ($line =~ s/^-sport (\S+)\s*//) {
1971             $rule->{sport} = $1;
1972             next;
1973         }
1974         if ($line =~ s/^-source (\S+)\s*//) {
1975             $rule->{source} = $1;
1976             next;
1977         }
1978         if ($line =~ s/^-dest (\S+)\s*//) {
1979             $rule->{dest} = $1;
1980             next;
1981         }
1982
1983         last;
1984     }
1985
1986     die "unable to parse rule parameters: $line\n" if length($line);
1987
1988     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
1989     if ($verbose && $rule->{errors}) {
1990         warn "$prefix - errors in rule parameters: $orig_line\n";
1991         foreach my $p (keys %{$rule->{errors}}) {
1992             warn "  $p: $rule->{errors}->{$p}\n";
1993         }
1994     }
1995
1996     return $rule;
1997 }
1998
1999 sub parse_vmfw_option {
2000     my ($line) = @_;
2001
2002     my ($opt, $value);
2003
2004     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2005
2006     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2007         $opt = lc($1);
2008         $value = int($2);
2009     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2010         $opt = lc($1);
2011         $value = $2 ? lc($3) : '';
2012     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2013         $opt = lc($1);
2014         $value = uc($3);
2015     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2016         $opt = lc($1);
2017         $value = $2;
2018     } else {
2019         chomp $line;
2020         die "can't parse option '$line'\n"
2021     }
2022
2023     return ($opt, $value);
2024 }
2025
2026 sub parse_hostfw_option {
2027     my ($line) = @_;
2028
2029     my ($opt, $value);
2030
2031     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2032
2033     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2034         $opt = lc($1);
2035         $value = int($2);
2036     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2037         $opt = lc($1);
2038         $value = $2 ? lc($3) : '';
2039     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2040         $opt = lc($1);
2041         $value = int($2);
2042     } else {
2043         chomp $line;
2044         die "can't parse option '$line'\n"
2045     }
2046
2047     return ($opt, $value);
2048 }
2049
2050 sub parse_clusterfw_option {
2051     my ($line) = @_;
2052
2053     my ($opt, $value);
2054
2055     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2056         $opt = lc($1);
2057         $value = int($2);
2058     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2059         $opt = lc($1);
2060         $value = uc($3);
2061     } else {
2062         chomp $line;
2063         die "can't parse option '$line'\n"
2064     }
2065
2066     return ($opt, $value);
2067 }
2068
2069 sub parse_alias {
2070     my ($line) = @_;
2071
2072     # we can add single line comments to the end of the line
2073     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2074
2075     if ($line =~ m/^(\S+)\s(\S+)$/) {
2076         my ($name, $cidr) = ($1, $2);
2077         $cidr =~ s|/32$||;
2078         pve_verify_ipv4_or_cidr($cidr);
2079         my $data = {
2080             name => $name,
2081             cidr => $cidr,
2082         };
2083         $data->{comment} = $comment  if $comment;
2084         return $data;
2085     }
2086
2087     return undef;
2088 }
2089
2090 sub parse_vm_fw_rules {
2091     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2092
2093     my $res = {
2094         rules => [],
2095         options => {},
2096         aliases => {},
2097     };
2098
2099     my $section;
2100
2101     while (defined(my $line = <$fh>)) {
2102         next if $line =~ m/^#/;
2103         next if $line =~ m/^\s*$/;
2104
2105         my $linenr = $fh->input_line_number();
2106         my $prefix = "$filename (line $linenr)";
2107
2108         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2109             $section = lc($1);
2110             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2111             next;
2112         }
2113         if (!$section) {
2114             warn "$prefix: skip line - no section";
2115             next;
2116         }
2117
2118         next if !$res->{$section}; # skip undefined section
2119
2120         if ($section eq 'options') {
2121             eval {
2122                 my ($opt, $value) = parse_vmfw_option($line);
2123                 $res->{options}->{$opt} = $value;
2124             };
2125             warn "$prefix: $@" if $@;
2126             next;
2127         }
2128
2129         if ($section eq 'aliases') {
2130             eval {
2131                 my $data = parse_alias($line);
2132                 $res->{aliases}->{lc($data->{name})} = $data;
2133             };
2134             warn "$prefix: $@" if $@;
2135             next;
2136         }
2137
2138         my $rule;
2139         eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2140         if (my $err = $@) {
2141             warn "$prefix: $err";
2142             next;
2143         }
2144
2145         push @{$res->{$section}}, $rule;
2146     }
2147
2148     return $res;
2149 }
2150
2151 sub parse_host_fw_rules {
2152     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2153
2154     my $res = { rules => [], options => {}};
2155
2156     my $section;
2157
2158     while (defined(my $line = <$fh>)) {
2159         next if $line =~ m/^#/;
2160         next if $line =~ m/^\s*$/;
2161
2162         my $linenr = $fh->input_line_number();
2163         my $prefix = "$filename (line $linenr)";
2164
2165         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2166             $section = lc($1);
2167             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2168             next;
2169         }
2170         if (!$section) {
2171             warn "$prefix: skip line - no section";
2172             next;
2173         }
2174
2175         next if !$res->{$section}; # skip undefined section
2176
2177         if ($section eq 'options') {
2178             eval {
2179                 my ($opt, $value) = parse_hostfw_option($line);
2180                 $res->{options}->{$opt} = $value;
2181             };
2182             warn "$prefix: $@" if $@;
2183             next;
2184         }
2185
2186         my $rule;
2187         eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, 'host', $verbose); };
2188         if (my $err = $@) {
2189             warn "$prefix: $err";
2190             next;
2191         }
2192
2193         push @{$res->{$section}}, $rule;
2194     }
2195
2196     return $res;
2197 }
2198
2199 sub parse_cluster_fw_rules {
2200     my ($filename, $fh, $verbose) = @_;
2201
2202     my $section;
2203     my $group;
2204
2205     my $res = {
2206         rules => [],
2207         options => {},
2208         aliases => {},
2209         groups => {},
2210         group_comments => {},
2211         ipset => {} ,
2212         ipset_comments => {},
2213     };
2214
2215     while (defined(my $line = <$fh>)) {
2216         next if $line =~ m/^#/;
2217         next if $line =~ m/^\s*$/;
2218
2219         my $linenr = $fh->input_line_number();
2220         my $prefix = "$filename (line $linenr)";
2221
2222         if ($line =~ m/^\[options\]$/i) {
2223             $section = 'options';
2224             next;
2225         }
2226
2227         if ($line =~ m/^\[aliases\]$/i) {
2228             $section = 'aliases';
2229             next;
2230         }
2231
2232         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2233             $section = 'groups';
2234             $group = lc($1);
2235             my $comment = $2;
2236             $res->{$section}->{$group} = [];
2237             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2238                 if $comment;
2239             next;
2240         }
2241
2242         if ($line =~ m/^\[rules\]$/i) {
2243             $section = 'rules';
2244             next;
2245         }
2246
2247         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2248             $section = 'ipset';
2249             $group = lc($1);
2250             my $comment = $2;
2251             $res->{$section}->{$group} = [];
2252             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2253                 if $comment;
2254             next;
2255         }
2256
2257         if (!$section) {
2258             warn "$prefix: skip line - no section\n";
2259             next;
2260         }
2261
2262         if ($section eq 'options') {
2263             eval {
2264                 my ($opt, $value) = parse_clusterfw_option($line);
2265                 $res->{options}->{$opt} = $value;
2266             };
2267             warn "$prefix: $@" if $@;
2268         } elsif ($section eq 'aliases') {
2269             eval {
2270                 my $data = parse_alias($line);
2271                 $res->{aliases}->{lc($data->{name})} = $data;
2272             };
2273             warn "$prefix: $@" if $@;
2274         } elsif ($section eq 'rules') {
2275             my $rule;
2276             eval { $rule = parse_fw_rule($prefix, $line, $res, undef, 'cluster', $verbose); };
2277             if (my $err = $@) {
2278                 warn "$prefix: $err";
2279                 next;
2280             }
2281             push @{$res->{$section}}, $rule;
2282         } elsif ($section eq 'groups') {
2283             my $rule;
2284             eval { $rule = parse_fw_rule($prefix, $line, $res, undef, 'group', $verbose); };
2285             if (my $err = $@) {
2286                 warn "$prefix: $err";
2287                 next;
2288             }
2289             push @{$res->{$section}->{$group}}, $rule;
2290         } elsif ($section eq 'ipset') {
2291             # we can add single line comments to the end of the rule
2292             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2293
2294             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2295             my $nomatch = $1;
2296             my $cidr = $2;
2297
2298             if($cidr !~ m/^${ip_alias_pattern}$/) {
2299                 $cidr =~ s|/32$||;
2300
2301                 eval { pve_verify_ipv4_or_cidr($cidr); };
2302                 if (my $err = $@) {
2303                     warn "$prefix: $cidr - $err";
2304                     next;
2305                 }
2306             }
2307
2308             my $entry = { cidr => $cidr };
2309             $entry->{nomatch} = 1 if $nomatch;
2310             $entry->{comment} = $comment if $comment;
2311
2312             push @{$res->{$section}->{$group}}, $entry;
2313         }
2314     }
2315
2316     return $res;
2317 }
2318
2319 sub run_locked {
2320     my ($code, @param) = @_;
2321
2322     my $timeout = 10;
2323
2324     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2325
2326     die $@ if $@;
2327
2328     return $res;
2329 }
2330
2331 sub read_local_vm_config {
2332
2333     my $openvz = {};
2334     my $qemu = {};
2335
2336     my $vmdata = { openvz => $openvz, qemu => $qemu };
2337
2338     my $vmlist = PVE::Cluster::get_vmlist();
2339     return $vmdata if !$vmlist || !$vmlist->{ids};
2340     my $ids = $vmlist->{ids};
2341
2342     foreach my $vmid (keys %$ids) {
2343         next if !$vmid; # skip VE0
2344         my $d = $ids->{$vmid};
2345         next if !$d->{node} || $d->{node} ne $nodename;
2346         next if !$d->{type};
2347         if ($d->{type} eq 'openvz') {
2348             if ($have_pve_manager) {
2349                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2350                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2351                     $openvz->{$vmid} = $conf;
2352                 }
2353             }
2354         } elsif ($d->{type} eq 'qemu') {
2355             if ($have_qemu_server) {
2356                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2357                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2358                     $qemu->{$vmid} = $conf;
2359                 }
2360             }
2361         }
2362     }
2363
2364     return $vmdata;
2365 };
2366
2367 sub load_vmfw_conf {
2368     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2369
2370     my $vmfw_conf = {};
2371
2372     $dir = "/etc/pve/firewall" if !defined($dir);
2373
2374     my $filename = "$dir/$vmid.fw";
2375     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2376         $vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
2377     }
2378
2379     return $vmfw_conf;
2380 }
2381
2382 my $format_rules = sub {
2383     my ($rules, $allow_iface) = @_;
2384
2385     my $raw = '';
2386
2387     foreach my $rule (@$rules) {
2388         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2389             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2390             $raw .= uc($rule->{type});
2391             if ($rule->{macro}) {
2392                 $raw .= " $rule->{macro}($rule->{action})";
2393             } else {
2394                 $raw .= " " . $rule->{action};
2395             }
2396             if ($allow_iface && $rule->{iface}) {
2397                 $raw .= " -i $rule->{iface}";
2398             }
2399
2400             if ($rule->{type} ne  'group')  {
2401                 $raw .= " -source $rule->{source}" if $rule->{source};
2402                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2403                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2404                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2405                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2406             }
2407
2408             $raw .= " # " . encode('utf8', $rule->{comment})
2409                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2410             $raw .= "\n";
2411         } else {
2412             die "unknown rule type '$rule->{type}'";
2413         }
2414     }
2415
2416     return $raw;
2417 };
2418
2419 my $format_options = sub {
2420     my ($options) = @_;
2421
2422     my $raw = '';
2423
2424     $raw .= "[OPTIONS]\n\n";
2425     foreach my $opt (keys %$options) {
2426         $raw .= "$opt: $options->{$opt}\n";
2427     }
2428     $raw .= "\n";
2429
2430     return $raw;
2431 };
2432
2433 my $format_aliases = sub {
2434     my ($aliases) = @_;
2435
2436     my $raw = '';
2437
2438     $raw .= "[ALIASES]\n\n";
2439     foreach my $k (keys %$aliases) {
2440         my $e = $aliases->{$k};
2441         $raw .= "$e->{name} $e->{cidr}";
2442         $raw .= " # " . encode('utf8', $e->{comment})
2443             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2444         $raw .= "\n";
2445     }
2446     $raw .= "\n";
2447
2448     return $raw;
2449 };
2450
2451 my $format_ipset = sub {
2452     my ($options) = @_;
2453
2454     my $raw = '';
2455
2456     my $nethash = {};
2457     foreach my $entry (@$options) {
2458         $nethash->{$entry->{cidr}} = $entry;
2459     }
2460
2461     foreach my $cidr (sort keys %$nethash) {
2462         my $entry = $nethash->{$cidr};
2463         my $line = $entry->{nomatch} ? '!' : '';
2464         $line .= $entry->{cidr};
2465         $line .= " # " . encode('utf8', $entry->{comment})
2466             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2467         $raw .= "$line\n";
2468     }
2469
2470     return $raw;
2471 };
2472
2473 sub save_vmfw_conf {
2474     my ($vmid, $vmfw_conf) = @_;
2475
2476     my $raw = '';
2477
2478     my $options = $vmfw_conf->{options};
2479     $raw .= &$format_options($options) if scalar(keys %$options);
2480
2481     my $aliases = $vmfw_conf->{aliases};
2482     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2483
2484     my $rules = $vmfw_conf->{rules} || [];
2485     if (scalar(@$rules)) {
2486         $raw .= "[RULES]\n\n";
2487         $raw .= &$format_rules($rules, 1);
2488         $raw .= "\n";
2489     }
2490
2491     my $filename = "/etc/pve/firewall/$vmid.fw";
2492     PVE::Tools::file_set_contents($filename, $raw);
2493 }
2494
2495 sub read_vm_firewall_configs {
2496     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2497
2498     my $vmfw_configs = {};
2499
2500     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2501         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2502         next if !$vmfw_conf->{options}; # skip if file does not exists
2503         $vmfw_configs->{$vmid} = $vmfw_conf;
2504     }
2505     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2506         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2507         next if !$vmfw_conf->{options}; # skip if file does not exists
2508         $vmfw_configs->{$vmid} = $vmfw_conf;
2509     }
2510
2511     return $vmfw_configs;
2512 }
2513
2514 sub get_option_log_level {
2515     my ($options, $k) = @_;
2516
2517     my $v = $options->{$k};
2518     $v = $default_log_level if !defined($v);
2519
2520     return undef if $v eq '' || $v eq 'nolog';
2521
2522     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2523
2524     return $v if ($v >= 0) && ($v <= 7);
2525
2526     warn "unknown log level ($k = '$v')\n";
2527
2528     return undef;
2529 }
2530
2531 sub generate_std_chains {
2532     my ($ruleset, $options) = @_;
2533
2534     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2535
2536     # same as shorewall smurflog.
2537     my $chain = 'PVEFW-smurflog';
2538     $pve_std_chains->{$chain} = [];
2539
2540     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2541     push @{$pve_std_chains->{$chain}}, "-j DROP";
2542
2543     # same as shorewall logflags action.
2544     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2545     $chain = 'PVEFW-logflags';
2546     $pve_std_chains->{$chain} = [];
2547
2548     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2549     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2550     push @{$pve_std_chains->{$chain}}, "-j DROP";
2551
2552     foreach my $chain (keys %$pve_std_chains) {
2553         ruleset_create_chain($ruleset, $chain);
2554         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2555             if (ref($rule)) {
2556                 ruleset_generate_rule($ruleset, $chain, $rule);
2557             } else {
2558                 ruleset_addrule($ruleset, $chain, $rule);
2559             }
2560         }
2561     }
2562 }
2563
2564 sub generate_ipset_chains {
2565     my ($ipset_ruleset, $fw_conf) = @_;
2566
2567     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2568         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2569     }
2570 }
2571
2572 sub generate_ipset {
2573     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2574
2575     my $hashsize = scalar(@$options);
2576     if ($hashsize <= 64) {
2577         $hashsize = 64;
2578     } else {
2579         $hashsize = round_powerof2($hashsize);
2580     }
2581
2582     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2583
2584     # remove duplicates
2585     my $nethash = {};
2586     foreach my $entry (@$options) {
2587         my $cidr = $entry->{cidr};
2588         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2589             my $alias = lc($cidr);
2590             if ($aliases->{$alias}) {
2591                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2592                 $nethash->{$entry->{cidr}} = $entry;
2593             } else {
2594                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2595             }
2596         } else {
2597             $nethash->{$entry->{cidr}} = $entry;
2598         }
2599     }
2600
2601     foreach my $cidr (sort keys %$nethash) {
2602         my $entry = $nethash->{$cidr};
2603
2604         my $cmd = "add $name $cidr";
2605         if ($entry->{nomatch}) {
2606             if ($feature_ipset_nomatch) {
2607                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2608             } else {
2609                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2610             }
2611         } else {
2612             push @{$ipset_ruleset->{$name}}, $cmd;
2613         }
2614     }
2615 }
2616
2617 sub round_powerof2 {
2618     my ($int) = @_;
2619
2620     $int--;
2621     $int |= $int >> $_ foreach (1,2,4,8,16);
2622     return ++$int;
2623 }
2624
2625 sub load_clusterfw_conf {
2626     my ($filename, $verbose) = @_;
2627
2628     $filename = $clusterfw_conf_filename if !defined($filename);
2629
2630     my $cluster_conf = {};
2631     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2632         $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
2633     }
2634
2635     return $cluster_conf;
2636 }
2637
2638 sub save_clusterfw_conf {
2639     my ($cluster_conf) = @_;
2640
2641     my $raw = '';
2642
2643     my $options = $cluster_conf->{options};
2644     $raw .= &$format_options($options) if scalar(keys %$options);
2645
2646     my $aliases = $cluster_conf->{aliases};
2647     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2648
2649     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2650         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2651             my $utf8comment = encode('utf8', $comment);
2652             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2653         } else {
2654             $raw .= "[IPSET $ipset]\n\n";
2655         }
2656         my $options = $cluster_conf->{ipset}->{$ipset};
2657         $raw .= &$format_ipset($options);
2658         $raw .= "\n";
2659     }
2660
2661     my $rules = $cluster_conf->{rules};
2662     if (scalar(@$rules)) {
2663         $raw .= "[RULES]\n\n";
2664         $raw .= &$format_rules($rules, 1);
2665         $raw .= "\n";
2666     }
2667
2668     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2669         my $rules = $cluster_conf->{groups}->{$group};
2670         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2671             my $utf8comment = encode('utf8', $comment);
2672             $raw .= "[group $group] # $utf8comment\n\n";
2673         } else {
2674             $raw .= "[group $group]\n\n";
2675         }
2676
2677         $raw .= &$format_rules($rules, 0);
2678         $raw .= "\n";
2679     }
2680
2681     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2682 }
2683
2684 sub load_hostfw_conf {
2685     my ($cluster_conf, $filename, $verbose) = @_;
2686
2687     $filename = $hostfw_conf_filename if !defined($filename);
2688
2689     my $hostfw_conf = {};
2690     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2691         $hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
2692     }
2693     return $hostfw_conf;
2694 }
2695
2696 sub save_hostfw_conf {
2697     my ($hostfw_conf) = @_;
2698
2699     my $raw = '';
2700
2701     my $options = $hostfw_conf->{options};
2702     $raw .= &$format_options($options) if scalar(keys %$options);
2703
2704     my $rules = $hostfw_conf->{rules};
2705     if (scalar(@$rules)) {
2706         $raw .= "[RULES]\n\n";
2707         $raw .= &$format_rules($rules, 1);
2708         $raw .= "\n";
2709     }
2710
2711     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2712 }
2713
2714 sub compile {
2715     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2716
2717     my $vmfw_configs;
2718
2719     if ($vmdata) { # test mode
2720         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2721         my $filename = "$testdir/cluster.fw";
2722         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2723
2724         $filename = "$testdir/host.fw";
2725         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2726
2727         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2728     } else { # normal operation
2729         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2730
2731         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2732
2733         $vmdata = read_local_vm_config();
2734         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2735     }
2736
2737     $cluster_conf->{ipset}->{venet0} = [];
2738
2739     my $localnet;
2740     if ($cluster_conf->{aliases}->{local_network}) {
2741         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2742     } else {
2743         $localnet = local_network() || '127.0.0.0/8';
2744         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2745     }
2746
2747     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2748
2749     my $ruleset = {};
2750
2751     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2752     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2753
2754     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2755
2756     my $hostfw_options = $hostfw_conf->{options} || {};
2757
2758     # fixme: what log level should we use here?
2759     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2760
2761     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2762
2763     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2764     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2765     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2766
2767     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2768     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2769
2770     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2771
2772     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2773     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2774
2775     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2776     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2777
2778     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2779
2780     generate_std_chains($ruleset, $hostfw_options);
2781
2782     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2783
2784     if ($hostfw_enable) {
2785         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2786         warn $@ if $@; # just to be sure - should not happen
2787     }
2788
2789     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2790
2791     # generate firewall rules for QEMU VMs
2792     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2793         eval {
2794             my $conf = $vmdata->{qemu}->{$vmid};
2795             my $vmfw_conf = $vmfw_configs->{$vmid};
2796             return if !$vmfw_conf;
2797             return if !$vmfw_conf->{options}->{enable};
2798
2799             foreach my $netid (keys %$conf) {
2800                 next if $netid !~ m/^net(\d+)$/;
2801                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2802                 next if !$net->{firewall};
2803                 my $iface = "tap${vmid}i$1";
2804
2805                 my $macaddr = $net->{macaddr};
2806                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2807                                              $vmfw_conf, $vmid, 'IN');
2808                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2809                                              $vmfw_conf, $vmid, 'OUT');
2810             }
2811         };
2812         warn $@ if $@; # just to be sure - should not happen
2813     }
2814
2815     # generate firewall rules for OpenVZ containers
2816     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2817         eval {
2818             my $conf = $vmdata->{openvz}->{$vmid};
2819
2820             my $vmfw_conf = $vmfw_configs->{$vmid};
2821             return if !$vmfw_conf;
2822             return if !$vmfw_conf->{options}->{enable};
2823
2824             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2825                 my $ip = $conf->{ip_address}->{value};
2826                 $ip =~ s/\s+/,/g;
2827                 parse_address_list($ip); # make sure we have a valid $ip list
2828
2829                 my @ips = split(',', $ip);
2830
2831                 foreach my $singleip (@ips) {
2832                     my $venet0ipset = {};
2833                     $venet0ipset->{cidr} = $singleip;
2834                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2835                 }
2836
2837                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2838                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2839             }
2840
2841             if ($conf->{netif} && $conf->{netif}->{value}) {
2842                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2843                 foreach my $netid (keys %$netif) {
2844                     my $d = $netif->{$netid};
2845
2846                     my $macaddr = $d->{mac};
2847                     my $iface = $d->{host_ifname};
2848                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2849                                                  $vmfw_conf, $vmid, 'IN');
2850                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2851                                                  $vmfw_conf, $vmid, 'OUT');
2852                 }
2853             }
2854         };
2855         warn $@ if $@; # just to be sure - should not happen
2856     }
2857
2858     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2859         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2860     }
2861
2862     my $ipset_ruleset = {};
2863     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2864
2865     return ($ruleset, $ipset_ruleset);
2866 }
2867
2868 sub get_ruleset_status {
2869     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2870
2871     my $statushash = {};
2872
2873     foreach my $chain (sort keys %$ruleset) {
2874         my $sig = &$digest_fn($ruleset->{$chain});
2875
2876         $statushash->{$chain}->{sig} = $sig;
2877
2878         my $oldsig = $active_chains->{$chain};
2879         if (!defined($oldsig)) {
2880             $statushash->{$chain}->{action} = 'create';
2881         } else {
2882             if ($oldsig eq $sig) {
2883                 $statushash->{$chain}->{action} = 'exists';
2884             } else {
2885                 $statushash->{$chain}->{action} = 'update';
2886             }
2887         }
2888         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2889         foreach my $cmd (@{$ruleset->{$chain}}) {
2890             print "\t$cmd\n" if $verbose;
2891         }
2892     }
2893
2894     foreach my $chain (sort keys %$active_chains) {
2895         if (!defined($ruleset->{$chain})) {
2896             my $sig = $active_chains->{$chain};
2897             $statushash->{$chain}->{action} = 'delete';
2898             $statushash->{$chain}->{sig} = $sig;
2899             print "delete $chain ($sig)\n" if $verbose;
2900         }
2901     }
2902
2903     return $statushash;
2904 }
2905
2906 sub print_sig_rule {
2907     my ($chain, $sig) = @_;
2908
2909     # We just use this to store a SHA1 checksum used to detect changes
2910     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2911 }
2912
2913 sub get_ruleset_cmdlist {
2914     my ($ruleset, $verbose) = @_;
2915
2916     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2917
2918     my ($active_chains, $hooks) = iptables_get_chains();
2919     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2920
2921     # create missing chains first
2922     foreach my $chain (sort keys %$ruleset) {
2923         my $stat = $statushash->{$chain};
2924         die "internal error" if !$stat;
2925         next if $stat->{action} ne 'create';
2926
2927         $cmdlist .= ":$chain - [0:0]\n";
2928     }
2929
2930     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2931         if (!$hooks->{$h}) {
2932             $cmdlist .= "-A $h -j PVEFW-$h\n";
2933         }
2934     }
2935
2936     foreach my $chain (sort keys %$ruleset) {
2937         my $stat = $statushash->{$chain};
2938         die "internal error" if !$stat;
2939
2940         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2941             $cmdlist .= "-F $chain\n";
2942             foreach my $cmd (@{$ruleset->{$chain}}) {
2943                 $cmdlist .= "$cmd\n";
2944             }
2945             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2946         } elsif ($stat->{action} eq 'delete') {
2947             die "internal error"; # this should not happen
2948         } elsif ($stat->{action} eq 'exists') {
2949             # do nothing
2950         } else {
2951             die "internal error - unknown status '$stat->{action}'";
2952         }
2953     }
2954
2955     foreach my $chain (keys %$statushash) {
2956         next if $statushash->{$chain}->{action} ne 'delete';
2957         $cmdlist .= "-F $chain\n";
2958     }
2959     foreach my $chain (keys %$statushash) {
2960         next if $statushash->{$chain}->{action} ne 'delete';
2961         next if $chain eq 'PVEFW-INPUT';
2962         next if $chain eq 'PVEFW-OUTPUT';
2963         next if $chain eq 'PVEFW-FORWARD';
2964         $cmdlist .= "-X $chain\n";
2965     }
2966
2967     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2968
2969     $cmdlist .= "COMMIT\n";
2970
2971     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2972 }
2973
2974 sub get_ipset_cmdlist {
2975     my ($ruleset, $verbose) = @_;
2976
2977     my $cmdlist = "";
2978
2979     my $delete_cmdlist = "";
2980
2981     my $active_chains = ipset_get_chains();
2982     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2983
2984     # remove stale _swap chains
2985     foreach my $chain (keys %$active_chains) {
2986         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2987             $cmdlist .= "destroy $chain\n";
2988         }
2989     }
2990
2991     foreach my $chain (sort keys %$ruleset) {
2992         my $stat = $statushash->{$chain};
2993         die "internal error" if !$stat;
2994
2995         if ($stat->{action} eq 'create') {
2996             foreach my $cmd (@{$ruleset->{$chain}}) {
2997                 $cmdlist .= "$cmd\n";
2998             }
2999         }
3000
3001         if ($stat->{action} eq 'update') {
3002             my $chain_swap = $chain."_swap";
3003
3004             foreach my $cmd (@{$ruleset->{$chain}}) {
3005                 $cmd =~ s/$chain/$chain_swap/;
3006                 $cmdlist .= "$cmd\n";
3007             }
3008             $cmdlist .= "swap $chain_swap $chain\n";
3009             $cmdlist .= "flush $chain_swap\n";
3010             $cmdlist .= "destroy $chain_swap\n";
3011         }
3012
3013     }
3014
3015     foreach my $chain (keys %$statushash) {
3016         next if $statushash->{$chain}->{action} ne 'delete';
3017
3018         $delete_cmdlist .= "flush $chain\n";
3019         $delete_cmdlist .= "destroy $chain\n";
3020     }
3021
3022     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3023
3024     return ($cmdlist, $delete_cmdlist, $changes);
3025 }
3026
3027 sub apply_ruleset {
3028     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3029
3030     enable_bridge_firewall();
3031
3032     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3033         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3034
3035     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3036
3037     if ($verbose) {
3038         if ($ipset_changes) {
3039             print "ipset changes:\n";
3040             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3041             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3042         }
3043
3044         if ($changes) {
3045             print "iptables changes:\n";
3046             print $cmdlist;
3047         }
3048     }
3049
3050     ipset_restore_cmdlist($ipset_create_cmdlist);
3051
3052     iptables_restore_cmdlist($cmdlist);
3053
3054     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3055
3056     # test: re-read status and check if everything is up to date
3057     my $active_chains = iptables_get_chains();
3058     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3059
3060     my $errors;
3061     foreach my $chain (sort keys %$ruleset) {
3062         my $stat = $statushash->{$chain};
3063         if ($stat->{action} ne 'exists') {
3064             warn "unable to update chain '$chain'\n";
3065             $errors = 1;
3066         }
3067     }
3068
3069     die "unable to apply firewall changes\n" if $errors;
3070
3071     update_nf_conntrack_max($hostfw_conf);
3072
3073     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3074
3075 }
3076
3077 sub update_nf_conntrack_max {
3078     my ($hostfw_conf) = @_;
3079
3080     my $max = 65536; # reasonable default
3081
3082     my $options = $hostfw_conf->{options} || {};
3083
3084     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3085         $max = $options->{nf_conntrack_max};
3086         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3087     }
3088
3089     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3090     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3091
3092     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3093
3094     if ($current != $max) {
3095         my $hashsize = int($max/4);
3096         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3097         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3098     }
3099 }
3100
3101 sub update_nf_conntrack_tcp_timeout_established {
3102     my ($hostfw_conf) = @_;
3103
3104     my $options = $hostfw_conf->{options} || {};
3105
3106     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3107
3108     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3109 }
3110
3111 sub remove_pvefw_chains {
3112
3113     my ($chash, $hooks) = iptables_get_chains();
3114     my $cmdlist = "*filter\n";
3115
3116     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3117         if ($hooks->{$h}) {
3118             $cmdlist .= "-D $h -j PVEFW-$h\n";
3119         }
3120     }
3121
3122     foreach my $chain (keys %$chash) {
3123         $cmdlist .= "-F $chain\n";
3124     }
3125
3126     foreach my $chain (keys %$chash) {
3127         $cmdlist .= "-X $chain\n";
3128     }
3129     $cmdlist .= "COMMIT\n";
3130
3131     iptables_restore_cmdlist($cmdlist);
3132 }
3133
3134 sub init {
3135     my $cluster_conf = load_clusterfw_conf();
3136     my $cluster_options = $cluster_conf->{options};
3137     my $enable = $cluster_options->{enable};
3138
3139     return if !$enable;
3140
3141     # load required modules here
3142 }
3143
3144 sub update {
3145     my $code = sub {
3146
3147         my $cluster_conf = load_clusterfw_conf();
3148         my $cluster_options = $cluster_conf->{options};
3149
3150         my $enable = $cluster_options->{enable};
3151
3152         die "Firewall is disabled - cannot start\n" if !$enable;
3153
3154         if (!$enable) {
3155             PVE::Firewall::remove_pvefw_chains();
3156             return;
3157         }
3158
3159         my $hostfw_conf = load_hostfw_conf();
3160
3161         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3162
3163         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3164     };
3165
3166     run_locked($code);
3167 }
3168
3169 1;