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 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  39 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  40 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  41
  42 my $max_alias_name_length = 64;
  43 my $max_ipset_name_length = 64;
  44 my $max_group_name_length = 20;
  45
  46 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  47 sub pve_verify_ipv4_or_cidr {
  48     my ($cidr, $noerr) = @_;
  49
  50     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  51         return $cidr if Net::IP->new($cidr);
  52         return undef if $noerr;
  53         die Net::IP::Error() . "\n";
  54     }
  55     return undef if $noerr;
  56     die "value does not look like a valid IP address or CIDR network\n";
  57 }
  58
  59 PVE::JSONSchema::register_format('IPv4orCIDRorAlias', \&pve_verify_ipv4_or_cidr_or_alias);
  60 sub pve_verify_ipv4_or_cidr_or_alias {
  61     my ($cidr, $noerr) = @_;
  62
  63     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  64
  65     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  66         return $cidr if Net::IP->new($cidr);
  67         return undef if $noerr;
  68         die Net::IP::Error() . "\n";
  69     }
  70     return undef if $noerr;
  71     die "value does not look like a valid IP address or CIDR network\n";
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # imported/converted from: /usr/share/shorewall/macro.*
 136 my $pve_fw_macros = {
 137     'Amanda' => [
 138         "Amanda Backup",
 139         { action => 'PARAM', proto => 'udp', dport => '10080' },
 140         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 141     ],
 142     'Auth' => [
 143         "Auth (identd) traffic",
 144         { action => 'PARAM', proto => 'tcp', dport => '113' },
 145     ],
 146     'BGP' => [
 147         "Border Gateway Protocol traffic",
 148         { action => 'PARAM', proto => 'tcp', dport => '179' },
 149     ],
 150     'BitTorrent' => [
 151         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 152         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 153         { action => 'PARAM', proto => 'udp', dport => '6881' },
 154     ],
 155     'BitTorrent32' => [
 156         "BitTorrent traffic for BitTorrent 3.2 and later",
 157         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 158         { action => 'PARAM', proto => 'udp', dport => '6881' },
 159     ],
 160     'CVS' => [
 161         "Concurrent Versions System pserver traffic",
 162         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 163     ],
 164     'Citrix' => [
 165         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 166         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 167         { action => 'PARAM', proto => 'udp', dport => '1604' },
 168         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 169     ],
 170     'DAAP' => [
 171         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 172         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 173         { action => 'PARAM', proto => 'udp', dport => '3689' },
 174     ],
 175     'DCC' => [
 176         "Distributed Checksum Clearinghouse spam filtering mechanism",
 177         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 178     ],
 179     'DHCPfwd' => [
 180         "Forwarded DHCP traffic",
 181         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 182     ],
 183     'DNS' => [
 184         "Domain Name System traffic (upd and tcp)",
 185         { action => 'PARAM', proto => 'udp', dport => '53' },
 186         { action => 'PARAM', proto => 'tcp', dport => '53' },
 187     ],
 188     'Distcc' => [
 189         "Distributed Compiler service",
 190         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 191     ],
 192     'FTP' => [
 193         "File Transfer Protocol",
 194         { action => 'PARAM', proto => 'tcp', dport => '21' },
 195     ],
 196     'Finger' => [
 197         "Finger protocol (RFC 742)",
 198         { action => 'PARAM', proto => 'tcp', dport => '79' },
 199     ],
 200     'GNUnet' => [
 201         "GNUnet secure peer-to-peer networking traffic",
 202         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 203         { action => 'PARAM', proto => 'udp', dport => '2086' },
 204         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 205         { action => 'PARAM', proto => 'udp', dport => '1080' },
 206     ],
 207     'GRE' => [
 208         "Generic Routing Encapsulation tunneling protocol",
 209         { action => 'PARAM', proto => '47' },
 210     ],
 211     'Git' => [
 212         "Git distributed revision control traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 214     ],
 215     'HKP' => [
 216         "OpenPGP HTTP keyserver protocol traffic",
 217         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 218     ],
 219     'HTTP' => [
 220         "Hypertext Transfer Protocol (WWW)",
 221         { action => 'PARAM', proto => 'tcp', dport => '80' },
 222     ],
 223     'HTTPS' => [
 224         "Hypertext Transfer Protocol (WWW) over SSL",
 225         { action => 'PARAM', proto => 'tcp', dport => '443' },
 226     ],
 227     'ICPV2' => [
 228         "Internet Cache Protocol V2 (Squid) traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '3130' },
 230     ],
 231     'ICQ' => [
 232         "AOL Instant Messenger traffic",
 233         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 234     ],
 235     'IMAP' => [
 236         "Internet Message Access Protocol",
 237         { action => 'PARAM', proto => 'tcp', dport => '143' },
 238     ],
 239     'IMAPS' => [
 240         "Internet Message Access Protocol over SSL",
 241         { action => 'PARAM', proto => 'tcp', dport => '993' },
 242     ],
 243     'IPIP' => [
 244         "IPIP capsulation traffic",
 245         { action => 'PARAM', proto => '94' },
 246     ],
 247     'IPsec' => [
 248         "IPsec traffic",
 249         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 250         { action => 'PARAM', proto => '50' },
 251     ],
 252     'IPsecah' => [
 253         "IPsec authentication (AH) traffic",
 254         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 255         { action => 'PARAM', proto => '51' },
 256     ],
 257     'IPsecnat' => [
 258         "IPsec traffic and Nat-Traversal",
 259         { action => 'PARAM', proto => 'udp', dport => '500' },
 260         { action => 'PARAM', proto => 'udp', dport => '4500' },
 261         { action => 'PARAM', proto => '50' },
 262     ],
 263     'IRC' => [
 264         "Internet Relay Chat traffic",
 265         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 266     ],
 267     'Jetdirect' => [
 268         "HP Jetdirect printing",
 269         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 270     ],
 271     'L2TP' => [
 272         "Layer 2 Tunneling Protocol traffic",
 273         { action => 'PARAM', proto => 'udp', dport => '1701' },
 274     ],
 275     'LDAP' => [
 276         "Lightweight Directory Access Protocol traffic",
 277         { action => 'PARAM', proto => 'tcp', dport => '389' },
 278     ],
 279     'LDAPS' => [
 280         "Secure Lightweight Directory Access Protocol traffic",
 281         { action => 'PARAM', proto => 'tcp', dport => '636' },
 282     ],
 283     'MSNP' => [
 284         "Microsoft Notification Protocol",
 285         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 286     ],
 287     'MSSQL' => [
 288         "Microsoft SQL Server",
 289         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 290     ],
 291     'Mail' => [
 292         "Mail traffic (SMTP, SMTPS, Submission)",
 293         { action => 'PARAM', proto => 'tcp', dport => '25' },
 294         { action => 'PARAM', proto => 'tcp', dport => '465' },
 295         { action => 'PARAM', proto => 'tcp', dport => '587' },
 296     ],
 297     'Munin' => [
 298         "Munin networked resource monitoring traffic",
 299         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 300     ],
 301     'MySQL' => [
 302         "MySQL server",
 303         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 304     ],
 305     'NNTP' => [
 306         "NNTP traffic (Usenet).",
 307         { action => 'PARAM', proto => 'tcp', dport => '119' },
 308     ],
 309     'NNTPS' => [
 310         "Encrypted NNTP traffic (Usenet)",
 311         { action => 'PARAM', proto => 'tcp', dport => '563' },
 312     ],
 313     'NTP' => [
 314         "Network Time Protocol (ntpd)",
 315         { action => 'PARAM', proto => 'udp', dport => '123' },
 316     ],
 317     'OSPF' => [
 318         "OSPF multicast traffic",
 319         { action => 'PARAM', proto => '89' },
 320     ],
 321     'OpenVPN' => [
 322         "OpenVPN traffic",
 323         { action => 'PARAM', proto => 'udp', dport => '1194' },
 324     ],
 325     'PCA' => [
 326         "Symantec PCAnywere (tm)",
 327         { action => 'PARAM', proto => 'udp', dport => '5632' },
 328         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 329     ],
 330     'POP3' => [
 331         "POP3 traffic",
 332         { action => 'PARAM', proto => 'tcp', dport => '110' },
 333     ],
 334     'POP3S' => [
 335         "Encrypted POP3 traffic",
 336         { action => 'PARAM', proto => 'tcp', dport => '995' },
 337     ],
 338     'PPtP' => [
 339         "Point-to-Point Tunneling Protocol",
 340         { action => 'PARAM', proto => '47' },
 341         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 342     ],
 343     'Ping' => [
 344         "ICMP echo request",
 345         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 346     ],
 347     'PostgreSQL' => [
 348         "PostgreSQL server",
 349         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 350     ],
 351     'Printer' => [
 352         "Line Printer protocol printing",
 353         { action => 'PARAM', proto => 'tcp', dport => '515' },
 354     ],
 355     'RDP' => [
 356         "Microsoft Remote Desktop Protocol traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 358     ],
 359     'RIP' => [
 360         "Routing Information Protocol (bidirectional)",
 361         { action => 'PARAM', proto => 'udp', dport => '520' },
 362     ],
 363     'RNDC' => [
 364         "BIND remote management protocol",
 365         { action => 'PARAM', proto => 'tcp', dport => '953' },
 366     ],
 367     'Razor' => [
 368         "Razor Antispam System",
 369         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 370     ],
 371     'Rdate' => [
 372         "Remote time retrieval (rdate)",
 373         { action => 'PARAM', proto => 'tcp', dport => '37' },
 374     ],
 375     'Rsync' => [
 376         "Rsync server",
 377         { action => 'PARAM', proto => 'tcp', dport => '873' },
 378     ],
 379     'SANE' => [
 380         "SANE network scanning",
 381         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 382     ],
 383     'SMB' => [
 384         "Microsoft SMB traffic",
 385         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 386         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 387         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 388         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 389     ],
 390     'SMBswat' => [
 391         "Samba Web Administration Tool",
 392         { action => 'PARAM', proto => 'tcp', dport => '901' },
 393     ],
 394     'SMTP' => [
 395         "Simple Mail Transfer Protocol",
 396         { action => 'PARAM', proto => 'tcp', dport => '25' },
 397     ],
 398     'SMTPS' => [
 399         "Encrypted Simple Mail Transfer Protocol",
 400         { action => 'PARAM', proto => 'tcp', dport => '465' },
 401     ],
 402     'SNMP' => [
 403         "Simple Network Management Protocol",
 404         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 405         { action => 'PARAM', proto => 'tcp', dport => '161' },
 406     ],
 407     'SPAMD' => [
 408         "Spam Assassin SPAMD traffic",
 409         { action => 'PARAM', proto => 'tcp', dport => '783' },
 410     ],
 411     'SSH' => [
 412         "Secure shell traffic",
 413         { action => 'PARAM', proto => 'tcp', dport => '22' },
 414     ],
 415     'SVN' => [
 416         "Subversion server (svnserve)",
 417         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 418     ],
 419     'SixXS' => [
 420         "SixXS IPv6 Deployment and Tunnel Broker",
 421         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 422         { action => 'PARAM', proto => 'udp', dport => '3740' },
 423         { action => 'PARAM', proto => '41' },
 424         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 425     ],
 426     'Squid' => [
 427         "Squid web proxy traffic",
 428         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 429     ],
 430     'Submission' => [
 431         "Mail message submission traffic",
 432         { action => 'PARAM', proto => 'tcp', dport => '587' },
 433     ],
 434     'Syslog' => [
 435         "Syslog protocol (RFC 5424) traffic",
 436         { action => 'PARAM', proto => 'udp', dport => '514' },
 437         { action => 'PARAM', proto => 'tcp', dport => '514' },
 438     ],
 439     'TFTP' => [
 440         "Trivial File Transfer Protocol traffic",
 441         { action => 'PARAM', proto => 'udp', dport => '69' },
 442     ],
 443     'Telnet' => [
 444         "Telnet traffic",
 445         { action => 'PARAM', proto => 'tcp', dport => '23' },
 446     ],
 447     'Telnets' => [
 448         "Telnet over SSL",
 449         { action => 'PARAM', proto => 'tcp', dport => '992' },
 450     ],
 451     'Time' => [
 452         "RFC 868 Time protocol",
 453         { action => 'PARAM', proto => 'tcp', dport => '37' },
 454     ],
 455     'Trcrt' => [
 456         "Traceroute (for up to 30 hops) traffic",
 457         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 458         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 459     ],
 460     'VNC' => [
 461         "VNC traffic for VNC display's 0 - 99",
 462         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 463     ],
 464     'VNCL' => [
 465         "VNC traffic from Vncservers to Vncviewers in listen mode",
 466         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 467     ],
 468     'Web' => [
 469         "WWW traffic (HTTP and HTTPS)",
 470         { action => 'PARAM', proto => 'tcp', dport => '80' },
 471         { action => 'PARAM', proto => 'tcp', dport => '443' },
 472     ],
 473     'Webcache' => [
 474         "Web Cache/Proxy traffic (port 8080)",
 475         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 476     ],
 477     'Webmin' => [
 478         "Webmin traffic",
 479         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 480     ],
 481     'Whois' => [
 482         "Whois (nicname, RFC 3912) traffic",
 483         { action => 'PARAM', proto => 'tcp', dport => '43' },
 484     ],
 485 };
 486
 487 my $pve_fw_parsed_macros;
 488 my $pve_fw_macro_descr;
 489 my $pve_fw_preferred_macro_names = {};
 490
 491 my $pve_std_chains = {
 492     'PVEFW-SET-ACCEPT-MARK' => [
 493         "-j MARK --set-mark 1",
 494     ],
 495     'PVEFW-DropBroadcast' => [
 496         # same as shorewall 'Broadcast'
 497         # simply DROP BROADCAST/MULTICAST/ANYCAST
 498         # we can use this to reduce logging
 499         { action => 'DROP', dsttype => 'BROADCAST' },
 500         { action => 'DROP', dsttype => 'MULTICAST' },
 501         { action => 'DROP', dsttype => 'ANYCAST' },
 502         { action => 'DROP', dest => '224.0.0.0/4' },
 503     ],
 504     'PVEFW-reject' => [
 505         # same as shorewall 'reject'
 506         { action => 'DROP', dsttype => 'BROADCAST' },
 507         { action => 'DROP', source => '224.0.0.0/4' },
 508         { action => 'DROP', proto => 'icmp' },
 509         "-p tcp -j REJECT --reject-with tcp-reset",
 510         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 511         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 512         "-j REJECT --reject-with icmp-host-prohibited",
 513     ],
 514     'PVEFW-Drop' => [
 515         # same as shorewall 'Drop', which is equal to DROP,
 516         # but REJECT/DROP some packages to reduce logging,
 517         # and ACCEPT critical ICMP types
 518         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 519         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 520         { action => 'PVEFW-DropBroadcast' },
 521         # ACCEPT critical ICMP types
 522         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 523         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 524         # Drop packets with INVALID state
 525         "-m conntrack --ctstate INVALID -j DROP",
 526         # Drop Microsoft SMB noise
 527         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 528         { action => 'DROP', proto => 'udp', dport => '137:139'},
 529         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 530         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 531         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 532         # Drop new/NotSyn traffic so that it doesn't get logged
 533         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 534         # Drop DNS replies
 535         { action => 'DROP', proto => 'udp', sport => 53 },
 536     ],
 537     'PVEFW-Reject' => [
 538         # same as shorewall 'Reject', which is equal to Reject,
 539         # but REJECT/DROP some packages to reduce logging,
 540         # and ACCEPT critical ICMP types
 541         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 542         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 543         { action => 'PVEFW-DropBroadcast' },
 544         # ACCEPT critical ICMP types
 545         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 547         # Drop packets with INVALID state
 548         "-m conntrack --ctstate INVALID -j DROP",
 549         # Drop Microsoft SMB noise
 550         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 551         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 553         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 554         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 555         # Drop new/NotSyn traffic so that it doesn't get logged
 556         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 557         # Drop DNS replies
 558         { action => 'DROP', proto => 'udp', sport => 53 },
 559     ],
 560     'PVEFW-tcpflags' => [
 561         # same as shorewall tcpflags action.
 562         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 563         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 564         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 565         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 567         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 568     ],
 569     'PVEFW-smurfs' => [
 570         # same as shorewall smurfs action
 571         # Filter packets for smurfs (packets with a broadcast address as the source).
 572         "-s 0.0.0.0/32 -j RETURN",
 573         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 574         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 575     ],
 576 };
 577
 578 # iptables -p icmp -h
 579 my $icmp_type_names = {
 580     any => 1,
 581     'echo-reply' => 1,
 582     'destination-unreachable' => 1,
 583     'network-unreachable' => 1,
 584     'host-unreachable' => 1,
 585     'protocol-unreachable' => 1,
 586     'port-unreachable' => 1,
 587     'fragmentation-needed' => 1,
 588     'source-route-failed' => 1,
 589     'network-unknown' => 1,
 590     'host-unknown' => 1,
 591     'network-prohibited' => 1,
 592     'host-prohibited' => 1,
 593     'TOS-network-unreachable' => 1,
 594     'TOS-host-unreachable' => 1,
 595     'communication-prohibited' => 1,
 596     'host-precedence-violation' => 1,
 597     'precedence-cutoff' => 1,
 598     'source-quench' => 1,
 599     'redirect' => 1,
 600     'network-redirect' => 1,
 601     'host-redirect' => 1,
 602     'TOS-network-redirect' => 1,
 603     'TOS-host-redirect' => 1,
 604     'echo-request' => 1,
 605     'router-advertisement' => 1,
 606     'router-solicitation' => 1,
 607     'time-exceeded' => 1,
 608     'ttl-zero-during-transit' => 1,
 609     'ttl-zero-during-reassembly' => 1,
 610     'parameter-problem' => 1,
 611     'ip-header-bad' => 1,
 612     'required-option-missing' => 1,
 613     'timestamp-request' => 1,
 614     'timestamp-reply' => 1,
 615     'address-mask-request' => 1,
 616     'address-mask-reply' => 1,
 617 };
 618
 619 sub init_firewall_macros {
 620
 621     $pve_fw_parsed_macros = {};
 622
 623     foreach my $k (keys %$pve_fw_macros) {
 624         my $lc_name = lc($k);
 625         my $macro = $pve_fw_macros->{$k};
 626         if (!ref($macro->[0])) {
 627             $pve_fw_macro_descr->{$k} = shift @$macro;
 628         }
 629         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 630         $pve_fw_parsed_macros->{$k} = $macro;
 631     }
 632 }
 633
 634 init_firewall_macros();
 635
 636 sub get_macros {
 637     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 638 }
 639
 640 my $etc_services;
 641
 642 sub get_etc_services {
 643
 644     return $etc_services if $etc_services;
 645
 646     my $filename = "/etc/services";
 647
 648     my $fh = IO::File->new($filename, O_RDONLY);
 649     if (!$fh) {
 650         warn "unable to read '$filename' - $!\n";
 651         return {};
 652     }
 653
 654     my $services = {};
 655
 656     while (my $line = <$fh>) {
 657         chomp ($line);
 658         next if $line =~m/^#/;
 659         next if ($line =~m/^\s*$/);
 660
 661         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 662             $services->{byid}->{$2}->{name} = $1;
 663             $services->{byid}->{$2}->{port} = $2;
 664             $services->{byid}->{$2}->{$3} = 1;
 665             $services->{byname}->{$1} = $services->{byid}->{$2};
 666         }
 667     }
 668
 669     close($fh);
 670
 671     $etc_services = $services;
 672
 673
 674     return $etc_services;
 675 }
 676
 677 my $etc_protocols;
 678
 679 sub get_etc_protocols {
 680     return $etc_protocols if $etc_protocols;
 681
 682     my $filename = "/etc/protocols";
 683
 684     my $fh = IO::File->new($filename, O_RDONLY);
 685     if (!$fh) {
 686         warn "unable to read '$filename' - $!\n";
 687         return {};
 688     }
 689
 690     my $protocols = {};
 691
 692     while (my $line = <$fh>) {
 693         chomp ($line);
 694         next if $line =~m/^#/;
 695         next if ($line =~m/^\s*$/);
 696
 697         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 698             $protocols->{byid}->{$2}->{name} = $1;
 699             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 700         }
 701     }
 702
 703     close($fh);
 704
 705     $etc_protocols = $protocols;
 706
 707     return $etc_protocols;
 708 }
 709
 710 my $ipv4_mask_hash_localnet = {
 711     '255.255.0.0' => 16,
 712     '255.255.128.0' => 17,
 713     '255.255.192.0' => 18,
 714     '255.255.224.0' => 19,
 715     '255.255.240.0' => 20,
 716     '255.255.248.0' => 21,
 717     '255.255.252.0' => 22,
 718     '255.255.254.0' => 23,
 719     '255.255.255.0' => 24,
 720     '255.255.255.128' => 25,
 721     '255.255.255.192' => 26,
 722     '255.255.255.224' => 27,
 723     '255.255.255.240' => 28,
 724     '255.255.255.248' => 29,
 725     '255.255.255.252' => 30,
 726 };
 727
 728 my $__local_network;
 729
 730 sub local_network {
 731     my ($new_value) = @_;
 732
 733     $__local_network = $new_value if defined($new_value);
 734
 735     return $__local_network if defined($__local_network);
 736
 737     eval {
 738         my $nodename = PVE::INotify::nodename();
 739
 740         my $ip = PVE::Cluster::remote_node_ip($nodename);
 741
 742         my $testip = Net::IP->new($ip);
 743
 744         my $routes = PVE::ProcFSTools::read_proc_net_route();
 745         foreach my $entry (@$routes) {
 746             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 747             next if !defined($mask);
 748             return if $mask eq '0.0.0.0';
 749             my $cidr = "$entry->{dest}/$mask";
 750             my $testnet = Net::IP->new($cidr);
 751             if ($testnet->overlaps($testip)) {
 752                 $__local_network = $cidr;
 753                 return;
 754             }
 755         }
 756     };
 757     warn $@ if $@;
 758
 759     return $__local_network;
 760 }
 761
 762 my $max_iptables_ipset_name_length = 27;
 763
 764 sub compute_ipset_chain_name {
 765     my ($vmid, $ipset_name) = @_;
 766
 767     $vmid = 0 if !defined($vmid);
 768
 769     my $id = "$vmid-${ipset_name}";
 770
 771
 772     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 773         $id = PVE::Tools::fnv31a_hex($id);
 774     }
 775
 776     return "PVEFW-$id";
 777 }
 778
 779 sub parse_address_list {
 780     my ($str) = @_;
 781
 782     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 783         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 784         return;
 785     }
 786
 787     if ($str =~ m/^${ip_alias_pattern}$/) {
 788         die "alias name too long\n" if length($str) > $max_alias_name_length;
 789         return;
 790     }
 791
 792     my $count = 0;
 793     my $iprange = 0;
 794     foreach my $elem (split(/,/, $str)) {
 795         $count++;
 796         if (!Net::IP->new($elem)) {
 797             my $err = Net::IP::Error();
 798             die "invalid IP address: $err\n";
 799         }
 800         $iprange = 1 if $elem =~ m/-/;
 801     }
 802
 803     die "you can use a range in a list\n" if $iprange && $count > 1;
 804 }
 805
 806 sub parse_port_name_number_or_range {
 807     my ($str) = @_;
 808
 809     my $services = PVE::Firewall::get_etc_services();
 810     my $count = 0;
 811     my $icmp_port = 0;
 812
 813     foreach my $item (split(/,/, $str)) {
 814         $count++;
 815         if ($item =~ m/^(\d+):(\d+)$/) {
 816             my ($port1, $port2) = ($1, $2);
 817             die "invalid port '$port1'\n" if $port1 > 65535;
 818             die "invalid port '$port2'\n" if $port2 > 65535;
 819         } elsif ($item =~ m/^(\d+)$/) {
 820             my $port = $1;
 821             die "invalid port '$port'\n" if $port > 65535;
 822         } else {
 823             if ($icmp_type_names->{$item}) {
 824                 $icmp_port = 1;
 825             } else {
 826                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 827             }
 828         }
 829     }
 830
 831     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 832
 833     return $count;
 834 }
 835
 836 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 837 sub pve_fw_verify_port_spec {
 838    my ($portstr) = @_;
 839
 840    parse_port_name_number_or_range($portstr);
 841
 842    return $portstr;
 843 }
 844
 845 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 846 sub pve_fw_verify_v4addr_spec {
 847    my ($list) = @_;
 848
 849    parse_address_list($list);
 850
 851    return $list;
 852 }
 853
 854 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 855 sub pve_fw_verify_protocol_spec {
 856    my ($proto) = @_;
 857
 858    my $protocols = get_etc_protocols();
 859
 860    die "unknown protocol '$proto'\n" if $proto &&
 861        !(defined($protocols->{byname}->{$proto}) ||
 862          defined($protocols->{byid}->{$proto}));
 863
 864    return $proto;
 865 }
 866
 867
 868 # helper function for API
 869
 870 sub copy_opject_with_digest {
 871     my ($object) = @_;
 872
 873     my $sha = Digest::SHA->new('sha1');
 874
 875     my $res = {};
 876     foreach my $k (sort keys %$object) {
 877         my $v = $object->{$k};
 878         next if !defined($v);
 879         $res->{$k} = $v;
 880         $sha->add($k, ':', $v, "\n");
 881     }
 882
 883     my $digest = $sha->hexdigest;
 884
 885     $res->{digest} = $digest;
 886
 887     return wantarray ? ($res, $digest) : $res;
 888 }
 889
 890 sub copy_list_with_digest {
 891     my ($list) = @_;
 892
 893     my $sha = Digest::SHA->new('sha1');
 894
 895     my $res = [];
 896     foreach my $entry (@$list) {
 897         my $data = {};
 898         foreach my $k (sort keys %$entry) {
 899             my $v = $entry->{$k};
 900             next if !defined($v);
 901             $data->{$k} = $v;
 902             # Note: digest ignores refs ($rule->{errors})
 903             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 904         }
 905         push @$res, $data;
 906     }
 907
 908     my $digest = $sha->hexdigest;
 909
 910     foreach my $entry (@$res) {
 911         $entry->{digest} = $digest;
 912     }
 913
 914     return wantarray ? ($res, $digest) : $res;
 915 }
 916
 917 my $rule_properties = {
 918     pos => {
 919         description => "Update rule at position <pos>.",
 920         type => 'integer',
 921         minimum => 0,
 922         optional => 1,
 923     },
 924     digest => get_standard_option('pve-config-digest'),
 925     type => {
 926         type => 'string',
 927         optional => 1,
 928         enum => ['in', 'out', 'group'],
 929     },
 930     action => {
 931         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 932         type => 'string',
 933         optional => 1,
 934         pattern => $security_group_name_pattern,
 935         maxLength => 20,
 936         minLength => 2,
 937     },
 938     macro => {
 939         type => 'string',
 940         optional => 1,
 941         maxLength => 128,
 942     },
 943     iface => get_standard_option('pve-iface', { optional => 1 }),
 944     source => {
 945         type => 'string', format => 'pve-fw-v4addr-spec',
 946         optional => 1,
 947     },
 948     dest => {
 949         type => 'string', format => 'pve-fw-v4addr-spec',
 950         optional => 1,
 951     },
 952     proto => {
 953         type => 'string', format => 'pve-fw-protocol-spec',
 954         optional => 1,
 955     },
 956     enable => {
 957         type => 'boolean',
 958         optional => 1,
 959     },
 960     sport => {
 961         type => 'string', format => 'pve-fw-port-spec',
 962         optional => 1,
 963     },
 964     dport => {
 965         type => 'string', format => 'pve-fw-port-spec',
 966         optional => 1,
 967     },
 968     comment => {
 969         type => 'string',
 970         optional => 1,
 971     },
 972 };
 973
 974 sub add_rule_properties {
 975     my ($properties) = @_;
 976
 977     foreach my $k (keys %$rule_properties) {
 978         my $h = $rule_properties->{$k};
 979         # copy data, so that we can modify later without side effects
 980         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 981     }
 982
 983     return $properties;
 984 }
 985
 986 sub delete_rule_properties {
 987     my ($rule, $delete_str) = @_;
 988
 989     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 990         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 991             if !defined($rule_properties->{$opt});
 992         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 993             if $opt eq 'type' || $opt eq 'action';
 994         delete $rule->{$opt};
 995     }
 996
 997     return $rule;
 998 }
 999
1000 my $apply_macro = sub {
1001     my ($macro_name, $param, $verify) = @_;
1002
1003     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1004     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1005
1006     my $rules = [];
1007
1008     foreach my $templ (@$macro_rules) {
1009         my $rule = {};
1010         my $param_used = {};
1011         foreach my $k (keys %$templ) {
1012             my $v = $templ->{$k};
1013             if ($v eq 'PARAM') {
1014                 $v = $param->{$k};
1015                 $param_used->{$k} = 1;
1016             } elsif ($v eq 'DEST') {
1017                 $v = $param->{dest};
1018                 $param_used->{dest} = 1;
1019             } elsif ($v eq 'SOURCE') {
1020                 $v = $param->{source};
1021                 $param_used->{source} = 1;
1022             }
1023
1024             if (!defined($v)) {
1025                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1026                 raise_param_exc({ macro => $msg }) if $verify;
1027                 die "$msg\n";
1028             }
1029             $rule->{$k} = $v;
1030         }
1031         foreach my $k (keys %$param) {
1032             next if $k eq 'macro';
1033             next if !defined($param->{$k});
1034             next if $param_used->{$k};
1035             if (defined($rule->{$k})) {
1036                 if ($rule->{$k} ne $param->{$k}) {
1037                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1038                     raise_param_exc({ $k => $msg }) if $verify;
1039                     die "$msg\n";
1040                 }
1041             } else {
1042                 $rule->{$k} = $param->{$k};
1043             }
1044         }
1045         push @$rules, $rule;
1046     }
1047
1048     return $rules;
1049 };
1050
1051 my $rule_env_iface_lookup = {
1052     'ct' => 1,
1053     'vm' => 1,
1054     'group' => 0,
1055     'cluster' => 1,
1056     'host' => 1,
1057 };
1058
1059 sub verify_rule {
1060     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1061
1062     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1063
1064     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1065     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1066
1067     my $errors = $rule->{errors} || {};
1068
1069     my $error_count = 0;
1070
1071     my $add_error = sub {
1072         my ($param, $msg)  = @_;
1073         chomp $msg;
1074         raise_param_exc({ $param => $msg }) if !$noerr;
1075         $error_count++;
1076         $errors->{$param} = $msg if !$errors->{$param};
1077     };
1078
1079     my $check_ipset_or_alias_property = sub {
1080         my ($name) = @_;
1081
1082         if (my $value = $rule->{$name}) {
1083             if ($value =~ m/^\+/) {
1084                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1085                     &$add_error($name, "no such ipset '$1'")
1086                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1087
1088                 } else {
1089                     &$add_error($name, "invalid ipset name '$value'");
1090                 }
1091             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1092                 my $alias = lc($value);
1093                 &$add_error($name, "no such alias '$value'")
1094                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1095             }
1096         }
1097     };
1098
1099     my $type = $rule->{type};
1100     my $action = $rule->{action};
1101
1102     &$add_error('type', "missing property") if !$type;
1103     &$add_error('action', "missing property") if !$action;
1104
1105     if ($type) {
1106         if ($type eq  'in' || $type eq 'out') {
1107             &$add_error('action', "unknown action '$action'")
1108                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1109         } elsif ($type eq 'group') {
1110             &$add_error('type', "security groups not allowed")
1111                 if !$allow_groups;
1112             &$add_error('action', "invalid characters in security group name")
1113                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1114         } else {
1115             &$add_error('type', "unknown rule type '$type'");
1116         }
1117     }
1118
1119     if ($rule->{iface}) {
1120         &$add_error('type', "parameter -i not allowed for this rule type")
1121             if !$allow_iface;
1122         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1123         &$add_error('iface', $@) if $@;
1124         if ($rule_env eq 'vm') {
1125             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1126                 if $rule->{iface} !~  m/^net(\d+)$/;
1127         } elsif ($rule_env eq 'ct') {
1128             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1129                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1130         }
1131     }
1132
1133     if ($rule->{macro}) {
1134         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1135             $rule->{macro} = $preferred_name;
1136         } else {
1137             &$add_error('macro', "unknown macro '$rule->{macro}'");
1138         }
1139     }
1140
1141     if ($rule->{proto}) {
1142         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1143         &$add_error('proto', $@) if $@;
1144     }
1145
1146     if ($rule->{dport}) {
1147         eval { parse_port_name_number_or_range($rule->{dport}); };
1148         &$add_error('dport', $@) if $@;
1149         &$add_error('proto', "missing property - 'dport' requires this property")
1150             if !$rule->{proto};
1151     }
1152
1153     if ($rule->{sport}) {
1154         eval { parse_port_name_number_or_range($rule->{sport}); };
1155         &$add_error('sport', $@) if $@;
1156         &$add_error('proto', "missing property - 'sport' requires this property")
1157             if !$rule->{proto};
1158     }
1159
1160     if ($rule->{source}) {
1161         eval { parse_address_list($rule->{source}); };
1162         &$add_error('source', $@) if $@;
1163         &$check_ipset_or_alias_property('source');
1164     }
1165
1166     if ($rule->{dest}) {
1167         eval { parse_address_list($rule->{dest}); };
1168         &$add_error('dest', $@) if $@;
1169         &$check_ipset_or_alias_property('dest');
1170     }
1171
1172     if ($rule->{macro} && !$error_count) {
1173         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1174         if (my $err = $@) {
1175             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1176                 my $eh = $err->{errors};
1177                 foreach my $p (keys %$eh) {
1178                     &$add_error($p, $eh->{$p});
1179                 }
1180             } else {
1181                 &$add_error('macro', "$err");
1182             }
1183         }
1184     }
1185
1186     $rule->{errors} = $errors if $error_count;
1187
1188     return $rule;
1189 }
1190
1191 sub copy_rule_data {
1192     my ($rule, $param) = @_;
1193
1194     foreach my $k (keys %$rule_properties) {
1195         if (defined(my $v = $param->{$k})) {
1196             if ($v eq '' || $v eq '-') {
1197                 delete $rule->{$k};
1198             } else {
1199                 $rule->{$k} = $v;
1200             }
1201         }
1202     }
1203
1204     return $rule;
1205 }
1206
1207 # core functions
1208 my $bridge_firewall_enabled = 0;
1209
1210 sub enable_bridge_firewall {
1211
1212     return if $bridge_firewall_enabled; # only once
1213
1214     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1215     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1216
1217     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1218     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1219
1220     $bridge_firewall_enabled = 1;
1221 }
1222
1223 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1224
1225 sub iptables_restore_cmdlist {
1226     my ($cmdlist) = @_;
1227
1228     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1229 }
1230
1231 sub ipset_restore_cmdlist {
1232     my ($cmdlist) = @_;
1233
1234     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1235 }
1236
1237 sub iptables_get_chains {
1238
1239     my $res = {};
1240
1241     # check what chains we want to track
1242     my $is_pvefw_chain = sub {
1243         my $name = shift;
1244
1245         return 1 if $name =~ m/^PVEFW-\S+$/;
1246
1247         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1248
1249         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1250
1251         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1252
1253         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1254         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1255
1256         return undef;
1257     };
1258
1259     my $table = '';
1260
1261     my $hooks = {};
1262
1263     my $parser = sub {
1264         my $line = shift;
1265
1266         return if $line =~ m/^#/;
1267         return if $line =~ m/^\s*$/;
1268
1269         if ($line =~ m/^\*(\S+)$/) {
1270             $table = $1;
1271             return;
1272         }
1273
1274         return if $table ne 'filter';
1275
1276         if ($line =~ m/^:(\S+)\s/) {
1277             my $chain = $1;
1278             return if !&$is_pvefw_chain($chain);
1279             $res->{$chain} = "unknown";
1280         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1281             my ($chain, $sig) = ($1, $2);
1282             return if !&$is_pvefw_chain($chain);
1283             $res->{$chain} = $sig;
1284         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1285             $hooks->{$1} = 1;
1286         } else {
1287             # simply ignore the rest
1288             return;
1289         }
1290     };
1291
1292     run_command("/sbin/iptables-save", outfunc => $parser);
1293
1294     return wantarray ? ($res, $hooks) : $res;
1295 }
1296
1297 sub iptables_chain_digest {
1298     my ($rules) = @_;
1299     my $digest = Digest::SHA->new('sha1');
1300     foreach my $rule (@$rules) { # order is important
1301         $digest->add($rule);
1302     }
1303     return $digest->b64digest;
1304 }
1305
1306 sub ipset_chain_digest {
1307     my ($rules) = @_;
1308
1309     my $digest = Digest::SHA->new('sha1');
1310     foreach my $rule (sort @$rules) { # note: sorted
1311         $digest->add($rule);
1312     }
1313     return $digest->b64digest;
1314 }
1315
1316 sub ipset_get_chains {
1317
1318     my $res = {};
1319     my $chains = {};
1320
1321     my $parser = sub {
1322         my $line = shift;
1323
1324         return if $line =~ m/^#/;
1325         return if $line =~ m/^\s*$/;
1326         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1327             my $chain = $1;
1328             $line =~ s/\s+$//; # delete trailing white space
1329             push @{$chains->{$chain}}, $line;
1330         } else {
1331             # simply ignore the rest
1332             return;
1333         }
1334     };
1335
1336     run_command("/usr/sbin/ipset save", outfunc => $parser);
1337
1338     # compute digest for each chain
1339     foreach my $chain (keys %$chains) {
1340         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1341     }
1342
1343     return $res;
1344 }
1345
1346 sub ruleset_generate_cmdstr {
1347     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1348
1349     return if defined($rule->{enable}) && !$rule->{enable};
1350     return if $rule->{errors};
1351
1352     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1353
1354     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1355     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1356
1357     my @cmd = ();
1358
1359     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1360     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1361
1362     my $source = $rule->{source};
1363     my $dest = $rule->{dest};
1364
1365     if ($source) {
1366         if ($source =~ m/^\+/) {
1367             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1368                 my $name = $1;
1369                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1370                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1371                     push @cmd, "-m set --match-set ${ipset_chain} src";
1372                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1373                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1374                     push @cmd, "-m set --match-set ${ipset_chain} src";
1375                 } else {
1376                     die "no such ipset '$name'\n";
1377                 }
1378             } else {
1379                 die "invalid security group name '$source'\n";
1380             }
1381         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1382             my $alias = lc($source);
1383             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1384             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1385             die "no such alias '$source'\n" if !$e;
1386             push @cmd, "-s $e->{cidr}";
1387         } elsif ($source =~ m/\-/){
1388             push @cmd, "-m iprange --src-range $source";
1389         } else {
1390             push @cmd, "-s $source";
1391         }
1392     }
1393
1394     if ($dest) {
1395         if ($dest =~ m/^\+/) {
1396             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1397                 my $name = $1;
1398                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1399                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1400                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1401                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1402                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1403                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1404                 } else {
1405                     die "no such ipset '$name'\n";
1406                 }
1407             } else {
1408                 die "invalid security group name '$dest'\n";
1409             }
1410         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1411             my $alias = lc($dest);
1412             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1413             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1414             die "no such alias '$dest'\n" if !$e;
1415             push @cmd, "-d $e->{cidr}";
1416         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1417             push @cmd, "-m iprange --dst-range $dest";
1418         } else {
1419             push @cmd, "-d $dest";
1420         }
1421     }
1422
1423     if ($rule->{proto}) {
1424         push @cmd, "-p $rule->{proto}";
1425
1426         my $multiport = 0;
1427         $multiport++ if $nbdport > 1;
1428         $multiport++ if $nbsport > 1;
1429
1430         push @cmd, "--match multiport" if $multiport;
1431
1432         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1433             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1434
1435         if ($rule->{dport}) {
1436             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1437                 # Note: we use dport to store --icmp-type
1438                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1439                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1440             } else {
1441                 if ($nbdport > 1) {
1442                     if ($multiport == 2) {
1443                         push @cmd,  "--ports $rule->{dport}";
1444                     } else {
1445                         push @cmd, "--dports $rule->{dport}";
1446                     }
1447                 } else {
1448                     push @cmd, "--dport $rule->{dport}";
1449                 }
1450             }
1451         }
1452
1453         if ($rule->{sport}) {
1454             if ($nbsport > 1) {
1455                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1456             } else {
1457                 push @cmd, "--sport $rule->{sport}";
1458             }
1459         }
1460     } elsif ($rule->{dport} || $rule->{sport}) {
1461         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1462         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1463     }
1464
1465     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1466
1467     if (my $action = $rule->{action}) {
1468         $action = $actions->{$action} if defined($actions->{$action});
1469         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1470         push @cmd, $goto ? "-g $action" : "-j $action";
1471     }
1472
1473     return scalar(@cmd) ? join(' ', @cmd) : undef;
1474 }
1475
1476 sub ruleset_generate_rule {
1477     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1478
1479     my $rules;
1480
1481     if ($rule->{macro}) {
1482         $rules = &$apply_macro($rule->{macro}, $rule);
1483     } else {
1484         $rules = [ $rule ];
1485     }
1486
1487     # update all or nothing
1488
1489     my @cmds = ();
1490     foreach my $tmp (@$rules) {
1491         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1492             push @cmds, $cmdstr;
1493         }
1494     }
1495
1496     foreach my $cmdstr (@cmds) {
1497         ruleset_addrule($ruleset, $chain, $cmdstr);
1498     }
1499 }
1500
1501 sub ruleset_generate_rule_insert {
1502     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1503
1504     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1505
1506     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1507         ruleset_insertrule($ruleset, $chain, $cmdstr);
1508     }
1509 }
1510
1511 sub ruleset_create_chain {
1512     my ($ruleset, $chain) = @_;
1513
1514     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1515     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1516
1517     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1518
1519     $ruleset->{$chain} = [];
1520 }
1521
1522 sub ruleset_chain_exist {
1523     my ($ruleset, $chain) = @_;
1524
1525     return $ruleset->{$chain} ? 1 : undef;
1526 }
1527
1528 sub ruleset_addrule {
1529    my ($ruleset, $chain, $rule) = @_;
1530
1531    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1532
1533    push @{$ruleset->{$chain}}, "-A $chain $rule";
1534 }
1535
1536 sub ruleset_insertrule {
1537    my ($ruleset, $chain, $rule) = @_;
1538
1539    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1540
1541    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1542 }
1543
1544 sub get_log_rule_base {
1545     my ($chain, $vmid, $msg, $loglevel) = @_;
1546
1547     die "internal error - no log level" if !defined($loglevel);
1548
1549     $vmid = 0 if !defined($vmid);
1550
1551     # Note: we use special format for prefix to pass further
1552     # info to log daemon (VMID, LOGVELEL and CHAIN)
1553
1554     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1555 }
1556
1557 sub ruleset_addlog {
1558     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1559
1560     return if !defined($loglevel);
1561
1562     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1563
1564     $logrule = "$rule $logrule" if defined($rule);
1565
1566     ruleset_addrule($ruleset, $chain, $logrule);
1567 }
1568
1569 sub ruleset_add_chain_policy {
1570     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1571
1572     if ($policy eq 'ACCEPT') {
1573
1574         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1575                               { ACCEPT =>  $accept_action});
1576
1577     } elsif ($policy eq 'DROP') {
1578
1579         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1580
1581         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1582
1583         ruleset_addrule($ruleset, $chain, "-j DROP");
1584     } elsif ($policy eq 'REJECT') {
1585         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1586
1587         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1588
1589         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1590     } else {
1591         # should not happen
1592         die "internal error: unknown policy '$policy'";
1593     }
1594 }
1595
1596 sub ruleset_chain_add_conn_filters {
1597     my ($ruleset, $chain, $accept) = @_;
1598
1599     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1600     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1601 }
1602
1603 sub ruleset_chain_add_input_filters {
1604     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1605
1606     if ($cluster_conf->{ipset}->{blacklist}){
1607         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1608             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1609             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1610             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1611         }
1612         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1613         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1614     }
1615
1616     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1617         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1618     }
1619
1620     if ($options->{tcpflags}) {
1621         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1622     }
1623 }
1624
1625 sub ruleset_create_vm_chain {
1626     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1627
1628     ruleset_create_chain($ruleset, $chain);
1629     my $accept = generate_nfqueue($options);
1630
1631     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1632         if ($direction eq 'OUT') {
1633             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1634                                                       proto => 'udp', sport => 68, dport => 67 });
1635         } else {
1636             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1637                                                       proto => 'udp', sport => 67, dport => 68 });
1638         }
1639     }
1640
1641     if ($direction eq 'OUT') {
1642         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1643             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1644         }
1645         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1646     }
1647 }
1648
1649 sub ruleset_add_group_rule {
1650     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1651
1652     my $group = $rule->{action};
1653     my $group_chain = "GROUP-$group-$direction";
1654     if(!ruleset_chain_exist($ruleset, $group_chain)){
1655         generate_group_rules($ruleset, $cluster_conf, $group);
1656     }
1657
1658     if ($direction eq 'OUT' && $rule->{iface_out}) {
1659         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1660     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1661         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1662     } else {
1663         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1664     }
1665
1666     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1667 }
1668
1669 sub ruleset_generate_vm_rules {
1670     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1671
1672     my $lc_direction = lc($direction);
1673
1674     my $in_accept = generate_nfqueue($options);
1675
1676     foreach my $rule (@$rules) {
1677         next if $rule->{iface} && $rule->{iface} ne $netid;
1678         next if !$rule->{enable} || $rule->{errors};
1679         if ($rule->{type} eq 'group') {
1680             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1681                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1682         } else {
1683             next if $rule->{type} ne $lc_direction;
1684             eval {
1685                 if ($direction eq 'OUT') {
1686                     ruleset_generate_rule($ruleset, $chain, $rule,
1687                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1688                                           undef, $cluster_conf, $vmfw_conf);
1689                 } else {
1690                     ruleset_generate_rule($ruleset, $chain, $rule,
1691                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1692                                           undef, $cluster_conf, $vmfw_conf);
1693                 }
1694             };
1695             warn $@ if $@;
1696         }
1697     }
1698 }
1699
1700 sub generate_nfqueue {
1701     my ($options) = @_;
1702
1703     if ($options->{ips}) {
1704         my $action = "NFQUEUE";
1705         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1706             if (defined($3) && defined($1)) {
1707                 $action .= " --queue-balance $1:$3";
1708             } elsif (defined($1)) {
1709                 $action .= " --queue-num $1";
1710             }
1711         }
1712         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1713         return $action;
1714     } else {
1715         return "ACCEPT";
1716     }
1717 }
1718
1719 sub ruleset_generate_vm_ipsrules {
1720     my ($ruleset, $options, $direction, $iface) = @_;
1721
1722     if ($options->{ips} && $direction eq 'IN') {
1723         my $nfqueue = generate_nfqueue($options);
1724
1725         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1726             ruleset_create_chain($ruleset, "PVEFW-IPS");
1727         }
1728
1729         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1730     }
1731 }
1732
1733 sub generate_venet_rules_direction {
1734     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1735
1736     my $lc_direction = lc($direction);
1737
1738     my $rules = $vmfw_conf->{rules};
1739
1740     my $options = $vmfw_conf->{options};
1741     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1742
1743     my $chain = "venet0-$vmid-$direction";
1744
1745     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1746
1747     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1748
1749     # implement policy
1750     my $policy;
1751
1752     if ($direction eq 'OUT') {
1753         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1754     } else {
1755         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1756     }
1757
1758     my $accept = generate_nfqueue($options);
1759     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1760     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1761
1762     if ($direction eq 'OUT') {
1763         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1764             action => $chain,
1765             source => $ip,
1766             iface_in => 'venet0'});
1767     } else {
1768         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1769             action => $chain,
1770             dest => $ip,
1771             iface_out => 'venet0'});
1772     }
1773 }
1774
1775 sub generate_tap_rules_direction {
1776     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1777
1778     my $lc_direction = lc($direction);
1779
1780     my $rules = $vmfw_conf->{rules};
1781
1782     my $options = $vmfw_conf->{options};
1783     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1784
1785     my $tapchain = "$iface-$direction";
1786
1787     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1788
1789     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1790
1791     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1792
1793     # implement policy
1794     my $policy;
1795
1796     if ($direction eq 'OUT') {
1797         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1798     } else {
1799         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1800     }
1801
1802     my $accept = generate_nfqueue($options);
1803     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1804     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1805
1806     # plug the tap chain to bridge chain
1807     if ($direction eq 'IN') {
1808         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1809                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1810     } else {
1811         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1812                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1813     }
1814 }
1815
1816 sub enable_host_firewall {
1817     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1818
1819     my $options = $hostfw_conf->{options};
1820     my $cluster_options = $cluster_conf->{options};
1821     my $rules = $hostfw_conf->{rules};
1822     my $cluster_rules = $cluster_conf->{rules};
1823
1824     # host inbound firewall
1825     my $chain = "PVEFW-HOST-IN";
1826     ruleset_create_chain($ruleset, $chain);
1827
1828     my $loglevel = get_option_log_level($options, "log_level_in");
1829
1830     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1831
1832     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1833     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1834
1835     # we use RETURN because we need to check also tap rules
1836     my $accept_action = 'RETURN';
1837
1838     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1839
1840     # add host rules first, so that cluster wide rules can be overwritten
1841     foreach my $rule (@$rules, @$cluster_rules) {
1842         next if !$rule->{enable} || $rule->{errors};
1843
1844         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1845
1846         eval {
1847             if ($rule->{type} eq 'group') {
1848                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1849             } elsif ($rule->{type} eq 'in') {
1850                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1851                                       undef, $cluster_conf, $hostfw_conf);
1852             }
1853         };
1854         warn $@ if $@;
1855         delete $rule->{iface_in};
1856     }
1857
1858     # allow standard traffic for management ipset (includes cluster network)
1859     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1860     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1861     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1862     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1863     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1864     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1865
1866     my $localnet = local_network();
1867
1868     # corosync
1869     if ($localnet) {
1870         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1871         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1872         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1873     }
1874
1875     # implement input policy
1876     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1877     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1878
1879     # host outbound firewall
1880     $chain = "PVEFW-HOST-OUT";
1881     ruleset_create_chain($ruleset, $chain);
1882
1883     $loglevel = get_option_log_level($options, "log_level_out");
1884
1885     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1886
1887     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1888
1889     # we use RETURN because we may want to check other thigs later
1890     $accept_action = 'RETURN';
1891
1892     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1893
1894     # add host rules first, so that cluster wide rules can be overwritten
1895     foreach my $rule (@$rules, @$cluster_rules) {
1896         next if !$rule->{enable} || $rule->{errors};
1897
1898         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1899         eval {
1900             if ($rule->{type} eq 'group') {
1901                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1902             } elsif ($rule->{type} eq 'out') {
1903                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1904                                       undef, $cluster_conf, $hostfw_conf);
1905             }
1906         };
1907         warn $@ if $@;
1908         delete $rule->{iface_out};
1909     }
1910
1911     # allow standard traffic on cluster network
1912     if ($localnet) {
1913         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1914         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1915         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1916         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1917
1918         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1919         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1920         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1921     }
1922
1923     # implement output policy
1924     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1925     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1926
1927     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1928     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1929 }
1930
1931 sub generate_group_rules {
1932     my ($ruleset, $cluster_conf, $group) = @_;
1933
1934     my $rules = $cluster_conf->{groups}->{$group};
1935
1936     if (!$rules) {
1937         warn "no such security group '$group'\n";
1938         $rules = []; # create empty chain
1939     }
1940
1941     my $chain = "GROUP-${group}-IN";
1942
1943     ruleset_create_chain($ruleset, $chain);
1944     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1945
1946     foreach my $rule (@$rules) {
1947         next if $rule->{type} ne 'in';
1948         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1949     }
1950
1951     $chain = "GROUP-${group}-OUT";
1952
1953     ruleset_create_chain($ruleset, $chain);
1954     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1955
1956     foreach my $rule (@$rules) {
1957         next if $rule->{type} ne 'out';
1958         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1959         # check also other tap rules later
1960         ruleset_generate_rule($ruleset, $chain, $rule,
1961                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1962     }
1963 }
1964
1965 my $MAX_NETS = 32;
1966 my $valid_netdev_names = {};
1967 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1968     $valid_netdev_names->{"net$i"} = 1;
1969 }
1970
1971 sub parse_fw_rule {
1972     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1973
1974     my $orig_line = $line;
1975
1976     my $rule = {};
1977
1978     # we can add single line comments to the end of the rule
1979     if ($line =~ s/#\s*(.*?)\s*$//) {
1980         $rule->{comment} = decode('utf8', $1);
1981     }
1982
1983     # we can disable a rule when prefixed with '|'
1984
1985     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1986
1987     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1988         die "unable to parse rule: $line\n";
1989
1990     $rule->{type} = lc($1);
1991     $rule->{action} = $2;
1992
1993     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1994         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1995             $rule->{macro} = $1;
1996             $rule->{action} = $2;
1997         }
1998     }
1999
2000     while (length($line)) {
2001         if ($line =~ s/^-i (\S+)\s*//) {
2002             $rule->{iface} = $1;
2003             next;
2004         }
2005
2006         last if $rule->{type} eq 'group';
2007
2008         if ($line =~ s/^-p (\S+)\s*//) {
2009             $rule->{proto} = $1;
2010             next;
2011         }
2012
2013         if ($line =~ s/^-dport (\S+)\s*//) {
2014             $rule->{dport} = $1;
2015             next;
2016         }
2017
2018         if ($line =~ s/^-sport (\S+)\s*//) {
2019             $rule->{sport} = $1;
2020             next;
2021         }
2022         if ($line =~ s/^-source (\S+)\s*//) {
2023             $rule->{source} = $1;
2024             next;
2025         }
2026         if ($line =~ s/^-dest (\S+)\s*//) {
2027             $rule->{dest} = $1;
2028             next;
2029         }
2030
2031         last;
2032     }
2033
2034     die "unable to parse rule parameters: $line\n" if length($line);
2035
2036     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2037     if ($verbose && $rule->{errors}) {
2038         warn "$prefix - errors in rule parameters: $orig_line\n";
2039         foreach my $p (keys %{$rule->{errors}}) {
2040             warn "  $p: $rule->{errors}->{$p}\n";
2041         }
2042     }
2043
2044     return $rule;
2045 }
2046
2047 sub parse_vmfw_option {
2048     my ($line) = @_;
2049
2050     my ($opt, $value);
2051
2052     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2053
2054     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2055         $opt = lc($1);
2056         $value = int($2);
2057     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2058         $opt = lc($1);
2059         $value = $2 ? lc($3) : '';
2060     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2061         $opt = lc($1);
2062         $value = uc($3);
2063     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2064         $opt = lc($1);
2065         $value = $2;
2066     } else {
2067         die "can't parse option '$line'\n"
2068     }
2069
2070     return ($opt, $value);
2071 }
2072
2073 sub parse_hostfw_option {
2074     my ($line) = @_;
2075
2076     my ($opt, $value);
2077
2078     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2079
2080     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2081         $opt = lc($1);
2082         $value = int($2);
2083     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2084         $opt = lc($1);
2085         $value = $2 ? lc($3) : '';
2086     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2087         $opt = lc($1);
2088         $value = int($2);
2089     } else {
2090         die "can't parse option '$line'\n"
2091     }
2092
2093     return ($opt, $value);
2094 }
2095
2096 sub parse_clusterfw_option {
2097     my ($line) = @_;
2098
2099     my ($opt, $value);
2100
2101     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2102         $opt = lc($1);
2103         $value = int($2);
2104     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2105         $opt = lc($1);
2106         $value = uc($3);
2107     } else {
2108         die "can't parse option '$line'\n"
2109     }
2110
2111     return ($opt, $value);
2112 }
2113
2114 sub resolve_alias {
2115     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2116
2117     if ($cidr !~ m/^\d/) {
2118         my $alias = lc($cidr);
2119         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2120         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2121         return $e->{cidr} if $e;
2122
2123         die "no such alias '$cidr'\n";
2124     }
2125
2126     return $cidr;
2127 }
2128
2129 sub parse_alias {
2130     my ($line) = @_;
2131
2132     # we can add single line comments to the end of the line
2133     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2134
2135     if ($line =~ m/^(\S+)\s(\S+)$/) {
2136         my ($name, $cidr) = ($1, $2);
2137         $cidr =~ s|/32$||;
2138         pve_verify_ipv4_or_cidr($cidr);
2139         my $data = {
2140             name => $name,
2141             cidr => $cidr,
2142         };
2143         $data->{comment} = $comment  if $comment;
2144         return $data;
2145     }
2146
2147     return undef;
2148 }
2149
2150 sub generic_fw_config_parser {
2151     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2152
2153     my $section;
2154     my $group;
2155
2156     my $res = $empty_conf;
2157
2158     while (defined(my $line = <$fh>)) {
2159         next if $line =~ m/^#/;
2160         next if $line =~ m/^\s*$/;
2161
2162         chomp $line;
2163
2164         my $linenr = $fh->input_line_number();
2165         my $prefix = "$filename (line $linenr)";
2166
2167         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2168             $section = 'options';
2169             next;
2170         }
2171
2172         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2173             $section = 'aliases';
2174             next;
2175         }
2176
2177         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2178             $section = 'groups';
2179             $group = lc($1);
2180             my $comment = $2;
2181             eval {
2182                 die "security group name too long\n" if length($group) > $max_group_name_length;
2183                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2184             };
2185             if (my $err = $@) {
2186                 ($section, $group, $comment) = undef;
2187                 warn "$prefix: $err";
2188                 next;
2189             }
2190
2191             $res->{$section}->{$group} = [];
2192             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2193                 if $comment;
2194             next;
2195         }
2196
2197         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2198             $section = 'rules';
2199             next;
2200         }
2201
2202         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2203             $section = 'ipset';
2204             $group = lc($1);
2205             my $comment = $2;
2206             eval {
2207                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2208                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2209             };
2210             if (my $err = $@) {
2211                 ($section, $group, $comment) = undef;
2212                 warn "$prefix: $err";
2213                 next;
2214             }
2215
2216             $res->{$section}->{$group} = [];
2217             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2218                 if $comment;
2219             next;
2220         }
2221
2222         if (!$section) {
2223             warn "$prefix: skip line - no section\n";
2224             next;
2225         }
2226
2227         if ($section eq 'options') {
2228             eval {
2229                 my ($opt, $value);
2230                 if ($rule_env eq 'cluster') {
2231                     ($opt, $value) = parse_clusterfw_option($line);
2232                 } elsif ($rule_env eq 'host') {
2233                     ($opt, $value) = parse_hostfw_option($line);
2234                 } else {
2235                     ($opt, $value) = parse_vmfw_option($line);
2236                 }
2237                 $res->{options}->{$opt} = $value;
2238             };
2239             warn "$prefix: $@" if $@;
2240         } elsif ($section eq 'aliases') {
2241             eval {
2242                 my $data = parse_alias($line);
2243                 $res->{aliases}->{lc($data->{name})} = $data;
2244             };
2245             warn "$prefix: $@" if $@;
2246         } elsif ($section eq 'rules') {
2247             my $rule;
2248             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2249             if (my $err = $@) {
2250                 warn "$prefix: $err";
2251                 next;
2252             }
2253             push @{$res->{$section}}, $rule;
2254         } elsif ($section eq 'groups') {
2255             my $rule;
2256             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2257             if (my $err = $@) {
2258                 warn "$prefix: $err";
2259                 next;
2260             }
2261             push @{$res->{$section}->{$group}}, $rule;
2262         } elsif ($section eq 'ipset') {
2263             # we can add single line comments to the end of the rule
2264             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2265
2266             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2267             my $nomatch = $1;
2268             my $cidr = $2;
2269             my $errors;
2270
2271             if ($nomatch && !$feature_ipset_nomatch) {
2272                 $errors->{nomatch} = "nomatch not supported by kernel";
2273             }
2274
2275             eval {
2276                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2277                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2278                 } else {
2279                     $cidr =~ s|/32$||;
2280                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2281                 }
2282             };
2283             if (my $err = $@) {
2284                 chomp $err;
2285                 $errors->{cidr} = $err;
2286             }
2287
2288             my $entry = { cidr => $cidr };
2289             $entry->{nomatch} = 1 if $nomatch;
2290             $entry->{comment} = $comment if $comment;
2291             $entry->{errors} =  $errors if $errors;
2292
2293             if ($verbose && $errors) {
2294                 warn "$prefix - errors in ipset '$group': $line\n";
2295                 foreach my $p (keys %{$errors}) {
2296                     warn "  $p: $errors->{$p}\n";
2297                 }
2298             }
2299
2300             push @{$res->{$section}->{$group}}, $entry;
2301         } else {
2302             warn "$prefix: skip line - unknown section\n";
2303             next;
2304         }
2305     }
2306
2307     return $res;
2308 }
2309
2310 sub parse_hostfw_config {
2311     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2312
2313     my $empty_conf = { rules => [], options => {}};
2314
2315     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2316 }
2317
2318 sub parse_vmfw_config {
2319     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2320
2321     my $empty_conf = {
2322         rules => [],
2323         options => {},
2324         aliases => {},
2325         ipset => {} ,
2326         ipset_comments => {},
2327     };
2328
2329     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2330 }
2331
2332 sub parse_clusterfw_config {
2333     my ($filename, $fh, $verbose) = @_;
2334
2335     my $section;
2336     my $group;
2337
2338     my $empty_conf = {
2339         rules => [],
2340         options => {},
2341         aliases => {},
2342         groups => {},
2343         group_comments => {},
2344         ipset => {} ,
2345         ipset_comments => {},
2346     };
2347
2348     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2349 }
2350
2351 sub run_locked {
2352     my ($code, @param) = @_;
2353
2354     my $timeout = 10;
2355
2356     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2357
2358     die $@ if $@;
2359
2360     return $res;
2361 }
2362
2363 sub read_local_vm_config {
2364
2365     my $openvz = {};
2366     my $qemu = {};
2367
2368     my $vmdata = { openvz => $openvz, qemu => $qemu };
2369
2370     my $vmlist = PVE::Cluster::get_vmlist();
2371     return $vmdata if !$vmlist || !$vmlist->{ids};
2372     my $ids = $vmlist->{ids};
2373
2374     foreach my $vmid (keys %$ids) {
2375         next if !$vmid; # skip VE0
2376         my $d = $ids->{$vmid};
2377         next if !$d->{node} || $d->{node} ne $nodename;
2378         next if !$d->{type};
2379         if ($d->{type} eq 'openvz') {
2380             if ($have_pve_manager) {
2381                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2382                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2383                     $openvz->{$vmid} = $conf;
2384                 }
2385             }
2386         } elsif ($d->{type} eq 'qemu') {
2387             if ($have_qemu_server) {
2388                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2389                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2390                     $qemu->{$vmid} = $conf;
2391                 }
2392             }
2393         }
2394     }
2395
2396     return $vmdata;
2397 };
2398
2399 sub load_vmfw_conf {
2400     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2401
2402     my $vmfw_conf = {};
2403
2404     $dir = "/etc/pve/firewall" if !defined($dir);
2405
2406     my $filename = "$dir/$vmid.fw";
2407     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2408         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2409         $vmfw_conf->{vmid} = $vmid;
2410     }
2411
2412     return $vmfw_conf;
2413 }
2414
2415 my $format_rules = sub {
2416     my ($rules, $allow_iface) = @_;
2417
2418     my $raw = '';
2419
2420     foreach my $rule (@$rules) {
2421         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2422             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2423             $raw .= uc($rule->{type});
2424             if ($rule->{macro}) {
2425                 $raw .= " $rule->{macro}($rule->{action})";
2426             } else {
2427                 $raw .= " " . $rule->{action};
2428             }
2429             if ($allow_iface && $rule->{iface}) {
2430                 $raw .= " -i $rule->{iface}";
2431             }
2432
2433             if ($rule->{type} ne  'group')  {
2434                 $raw .= " -source $rule->{source}" if $rule->{source};
2435                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2436                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2437                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2438                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2439             }
2440
2441             $raw .= " # " . encode('utf8', $rule->{comment})
2442                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2443             $raw .= "\n";
2444         } else {
2445             die "unknown rule type '$rule->{type}'";
2446         }
2447     }
2448
2449     return $raw;
2450 };
2451
2452 my $format_options = sub {
2453     my ($options) = @_;
2454
2455     my $raw = '';
2456
2457     $raw .= "[OPTIONS]\n\n";
2458     foreach my $opt (keys %$options) {
2459         $raw .= "$opt: $options->{$opt}\n";
2460     }
2461     $raw .= "\n";
2462
2463     return $raw;
2464 };
2465
2466 my $format_aliases = sub {
2467     my ($aliases) = @_;
2468
2469     my $raw = '';
2470
2471     $raw .= "[ALIASES]\n\n";
2472     foreach my $k (keys %$aliases) {
2473         my $e = $aliases->{$k};
2474         $raw .= "$e->{name} $e->{cidr}";
2475         $raw .= " # " . encode('utf8', $e->{comment})
2476             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2477         $raw .= "\n";
2478     }
2479     $raw .= "\n";
2480
2481     return $raw;
2482 };
2483
2484 my $format_ipsets = sub {
2485     my ($fw_conf) = @_;
2486
2487     my $raw = '';
2488
2489     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2490         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2491             my $utf8comment = encode('utf8', $comment);
2492             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2493         } else {
2494             $raw .= "[IPSET $ipset]\n\n";
2495         }
2496         my $options = $fw_conf->{ipset}->{$ipset};
2497
2498         my $nethash = {};
2499         foreach my $entry (@$options) {
2500             $nethash->{$entry->{cidr}} = $entry;
2501         }
2502
2503         foreach my $cidr (sort keys %$nethash) {
2504             my $entry = $nethash->{$cidr};
2505             my $line = $entry->{nomatch} ? '!' : '';
2506             $line .= $entry->{cidr};
2507             $line .= " # " . encode('utf8', $entry->{comment})
2508                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2509             $raw .= "$line\n";
2510         }
2511
2512         $raw .= "\n";
2513     }
2514
2515     return $raw;
2516 };
2517
2518 sub save_vmfw_conf {
2519     my ($vmid, $vmfw_conf) = @_;
2520
2521     my $raw = '';
2522
2523     my $options = $vmfw_conf->{options};
2524     $raw .= &$format_options($options) if scalar(keys %$options);
2525
2526     my $aliases = $vmfw_conf->{aliases};
2527     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2528
2529     $raw .= &$format_ipsets($vmfw_conf);
2530
2531     my $rules = $vmfw_conf->{rules} || [];
2532     if (scalar(@$rules)) {
2533         $raw .= "[RULES]\n\n";
2534         $raw .= &$format_rules($rules, 1);
2535         $raw .= "\n";
2536     }
2537
2538     my $filename = "/etc/pve/firewall/$vmid.fw";
2539     PVE::Tools::file_set_contents($filename, $raw);
2540 }
2541
2542 sub read_vm_firewall_configs {
2543     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2544
2545     my $vmfw_configs = {};
2546
2547     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2548         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2549         next if !$vmfw_conf->{options}; # skip if file does not exists
2550         $vmfw_configs->{$vmid} = $vmfw_conf;
2551     }
2552     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2553         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2554         next if !$vmfw_conf->{options}; # skip if file does not exists
2555         $vmfw_configs->{$vmid} = $vmfw_conf;
2556     }
2557
2558     return $vmfw_configs;
2559 }
2560
2561 sub get_option_log_level {
2562     my ($options, $k) = @_;
2563
2564     my $v = $options->{$k};
2565     $v = $default_log_level if !defined($v);
2566
2567     return undef if $v eq '' || $v eq 'nolog';
2568
2569     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2570
2571     return $v if ($v >= 0) && ($v <= 7);
2572
2573     warn "unknown log level ($k = '$v')\n";
2574
2575     return undef;
2576 }
2577
2578 sub generate_std_chains {
2579     my ($ruleset, $options) = @_;
2580
2581     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2582
2583     # same as shorewall smurflog.
2584     my $chain = 'PVEFW-smurflog';
2585     $pve_std_chains->{$chain} = [];
2586
2587     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2588     push @{$pve_std_chains->{$chain}}, "-j DROP";
2589
2590     # same as shorewall logflags action.
2591     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2592     $chain = 'PVEFW-logflags';
2593     $pve_std_chains->{$chain} = [];
2594
2595     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2596     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2597     push @{$pve_std_chains->{$chain}}, "-j DROP";
2598
2599     foreach my $chain (keys %$pve_std_chains) {
2600         ruleset_create_chain($ruleset, $chain);
2601         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2602             if (ref($rule)) {
2603                 ruleset_generate_rule($ruleset, $chain, $rule);
2604             } else {
2605                 ruleset_addrule($ruleset, $chain, $rule);
2606             }
2607         }
2608     }
2609 }
2610
2611 sub generate_ipset_chains {
2612     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2613
2614     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2615         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2616         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2617     }
2618 }
2619
2620 sub generate_ipset {
2621     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2622
2623     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2624
2625     my $hashsize = scalar(@$options);
2626     if ($hashsize <= 64) {
2627         $hashsize = 64;
2628     } else {
2629         $hashsize = round_powerof2($hashsize);
2630     }
2631
2632     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2633
2634     # remove duplicates
2635     my $nethash = {};
2636     foreach my $entry (@$options) {
2637         next if $entry->{errors}; # skip entries with errors
2638         eval {
2639             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2640             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2641         };
2642         warn $@ if $@;
2643     }
2644
2645     foreach my $cidr (sort keys %$nethash) {
2646         my $entry = $nethash->{$cidr};
2647
2648         my $cmd = "add $name $cidr";
2649         if ($entry->{nomatch}) {
2650             if ($feature_ipset_nomatch) {
2651                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2652             } else {
2653                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2654             }
2655         } else {
2656             push @{$ipset_ruleset->{$name}}, $cmd;
2657         }
2658     }
2659 }
2660
2661 sub round_powerof2 {
2662     my ($int) = @_;
2663
2664     $int--;
2665     $int |= $int >> $_ foreach (1,2,4,8,16);
2666     return ++$int;
2667 }
2668
2669 sub load_clusterfw_conf {
2670     my ($filename, $verbose) = @_;
2671
2672     $filename = $clusterfw_conf_filename if !defined($filename);
2673
2674     my $cluster_conf = {};
2675     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2676         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2677     }
2678
2679     return $cluster_conf;
2680 }
2681
2682 sub save_clusterfw_conf {
2683     my ($cluster_conf) = @_;
2684
2685     my $raw = '';
2686
2687     my $options = $cluster_conf->{options};
2688     $raw .= &$format_options($options) if scalar(keys %$options);
2689
2690     my $aliases = $cluster_conf->{aliases};
2691     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2692
2693     $raw .= &$format_ipsets($cluster_conf);
2694
2695     my $rules = $cluster_conf->{rules};
2696     if (scalar(@$rules)) {
2697         $raw .= "[RULES]\n\n";
2698         $raw .= &$format_rules($rules, 1);
2699         $raw .= "\n";
2700     }
2701
2702     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2703         my $rules = $cluster_conf->{groups}->{$group};
2704         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2705             my $utf8comment = encode('utf8', $comment);
2706             $raw .= "[group $group] # $utf8comment\n\n";
2707         } else {
2708             $raw .= "[group $group]\n\n";
2709         }
2710
2711         $raw .= &$format_rules($rules, 0);
2712         $raw .= "\n";
2713     }
2714
2715     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2716 }
2717
2718 sub load_hostfw_conf {
2719     my ($cluster_conf, $filename, $verbose) = @_;
2720
2721     $filename = $hostfw_conf_filename if !defined($filename);
2722
2723     my $hostfw_conf = {};
2724     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2725         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2726     }
2727     return $hostfw_conf;
2728 }
2729
2730 sub save_hostfw_conf {
2731     my ($hostfw_conf) = @_;
2732
2733     my $raw = '';
2734
2735     my $options = $hostfw_conf->{options};
2736     $raw .= &$format_options($options) if scalar(keys %$options);
2737
2738     my $rules = $hostfw_conf->{rules};
2739     if (scalar(@$rules)) {
2740         $raw .= "[RULES]\n\n";
2741         $raw .= &$format_rules($rules, 1);
2742         $raw .= "\n";
2743     }
2744
2745     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2746 }
2747
2748 sub compile {
2749     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2750
2751     my $vmfw_configs;
2752
2753     if ($vmdata) { # test mode
2754         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2755         my $filename = "$testdir/cluster.fw";
2756         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2757
2758         $filename = "$testdir/host.fw";
2759         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2760
2761         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2762     } else { # normal operation
2763         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2764
2765         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2766
2767         $vmdata = read_local_vm_config();
2768         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2769     }
2770
2771     $cluster_conf->{ipset}->{venet0} = [];
2772     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2773
2774     my $localnet;
2775     if ($cluster_conf->{aliases}->{local_network}) {
2776         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2777     } else {
2778         $localnet = local_network() || '127.0.0.0/8';
2779         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2780     }
2781
2782     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2783
2784     my $ruleset = {};
2785
2786     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2787     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2788
2789     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2790
2791     my $hostfw_options = $hostfw_conf->{options} || {};
2792
2793     # fixme: what log level should we use here?
2794     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2795
2796     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2797
2798
2799     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2800     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2801     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2802
2803     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2804     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2805
2806     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2807
2808     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2809     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2810
2811     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2812     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2813
2814     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2815
2816     generate_std_chains($ruleset, $hostfw_options);
2817
2818     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2819
2820     my $ipset_ruleset = {};
2821
2822     if ($hostfw_enable) {
2823         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2824         warn $@ if $@; # just to be sure - should not happen
2825     }
2826
2827     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2828
2829     # generate firewall rules for QEMU VMs
2830     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2831         eval {
2832             my $conf = $vmdata->{qemu}->{$vmid};
2833             my $vmfw_conf = $vmfw_configs->{$vmid};
2834             return if !$vmfw_conf;
2835             return if !$vmfw_conf->{options}->{enable};
2836
2837             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2838
2839             foreach my $netid (keys %$conf) {
2840                 next if $netid !~ m/^net(\d+)$/;
2841                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2842                 next if !$net->{firewall};
2843                 my $iface = "tap${vmid}i$1";
2844
2845                 my $macaddr = $net->{macaddr};
2846                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2847                                              $vmfw_conf, $vmid, 'IN');
2848                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2849                                              $vmfw_conf, $vmid, 'OUT');
2850             }
2851         };
2852         warn $@ if $@; # just to be sure - should not happen
2853     }
2854
2855     # generate firewall rules for OpenVZ containers
2856     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2857         eval {
2858             my $conf = $vmdata->{openvz}->{$vmid};
2859
2860             my $vmfw_conf = $vmfw_configs->{$vmid};
2861             return if !$vmfw_conf;
2862             return if !$vmfw_conf->{options}->{enable};
2863
2864             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2865
2866             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2867                 my $ip = $conf->{ip_address}->{value};
2868                 $ip =~ s/\s+/,/g;
2869                 parse_address_list($ip); # make sure we have a valid $ip list
2870
2871                 my @ips = split(',', $ip);
2872
2873                 foreach my $singleip (@ips) {
2874                     my $venet0ipset = {};
2875                     $venet0ipset->{cidr} = $singleip;
2876                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2877                 }
2878
2879                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2880                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2881             }
2882
2883             if ($conf->{netif} && $conf->{netif}->{value}) {
2884                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2885                 foreach my $netid (keys %$netif) {
2886                     my $d = $netif->{$netid};
2887
2888                     my $macaddr = $d->{mac};
2889                     my $iface = $d->{host_ifname};
2890                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2891                                                  $vmfw_conf, $vmid, 'IN');
2892                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2893                                                  $vmfw_conf, $vmid, 'OUT');
2894                 }
2895             }
2896         };
2897         warn $@ if $@; # just to be sure - should not happen
2898     }
2899
2900     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2901         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2902     }
2903
2904     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2905
2906     return ($ruleset, $ipset_ruleset);
2907 }
2908
2909 sub get_ruleset_status {
2910     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2911
2912     my $statushash = {};
2913
2914     foreach my $chain (sort keys %$ruleset) {
2915         my $sig = &$digest_fn($ruleset->{$chain});
2916
2917         $statushash->{$chain}->{sig} = $sig;
2918
2919         my $oldsig = $active_chains->{$chain};
2920         if (!defined($oldsig)) {
2921             $statushash->{$chain}->{action} = 'create';
2922         } else {
2923             if ($oldsig eq $sig) {
2924                 $statushash->{$chain}->{action} = 'exists';
2925             } else {
2926                 $statushash->{$chain}->{action} = 'update';
2927             }
2928         }
2929         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2930         foreach my $cmd (@{$ruleset->{$chain}}) {
2931             print "\t$cmd\n" if $verbose;
2932         }
2933     }
2934
2935     foreach my $chain (sort keys %$active_chains) {
2936         if (!defined($ruleset->{$chain})) {
2937             my $sig = $active_chains->{$chain};
2938             $statushash->{$chain}->{action} = 'delete';
2939             $statushash->{$chain}->{sig} = $sig;
2940             print "delete $chain ($sig)\n" if $verbose;
2941         }
2942     }
2943
2944     return $statushash;
2945 }
2946
2947 sub print_sig_rule {
2948     my ($chain, $sig) = @_;
2949
2950     # We just use this to store a SHA1 checksum used to detect changes
2951     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2952 }
2953
2954 sub get_ruleset_cmdlist {
2955     my ($ruleset, $verbose) = @_;
2956
2957     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2958
2959     my ($active_chains, $hooks) = iptables_get_chains();
2960     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2961
2962     # create missing chains first
2963     foreach my $chain (sort keys %$ruleset) {
2964         my $stat = $statushash->{$chain};
2965         die "internal error" if !$stat;
2966         next if $stat->{action} ne 'create';
2967
2968         $cmdlist .= ":$chain - [0:0]\n";
2969     }
2970
2971     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2972         if (!$hooks->{$h}) {
2973             $cmdlist .= "-A $h -j PVEFW-$h\n";
2974         }
2975     }
2976
2977     foreach my $chain (sort keys %$ruleset) {
2978         my $stat = $statushash->{$chain};
2979         die "internal error" if !$stat;
2980
2981         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2982             $cmdlist .= "-F $chain\n";
2983             foreach my $cmd (@{$ruleset->{$chain}}) {
2984                 $cmdlist .= "$cmd\n";
2985             }
2986             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2987         } elsif ($stat->{action} eq 'delete') {
2988             die "internal error"; # this should not happen
2989         } elsif ($stat->{action} eq 'exists') {
2990             # do nothing
2991         } else {
2992             die "internal error - unknown status '$stat->{action}'";
2993         }
2994     }
2995
2996     foreach my $chain (keys %$statushash) {
2997         next if $statushash->{$chain}->{action} ne 'delete';
2998         $cmdlist .= "-F $chain\n";
2999     }
3000     foreach my $chain (keys %$statushash) {
3001         next if $statushash->{$chain}->{action} ne 'delete';
3002         next if $chain eq 'PVEFW-INPUT';
3003         next if $chain eq 'PVEFW-OUTPUT';
3004         next if $chain eq 'PVEFW-FORWARD';
3005         $cmdlist .= "-X $chain\n";
3006     }
3007
3008     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3009
3010     $cmdlist .= "COMMIT\n";
3011
3012     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3013 }
3014
3015 sub get_ipset_cmdlist {
3016     my ($ruleset, $verbose) = @_;
3017
3018     my $cmdlist = "";
3019
3020     my $delete_cmdlist = "";
3021
3022     my $active_chains = ipset_get_chains();
3023     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3024
3025     # remove stale _swap chains
3026     foreach my $chain (keys %$active_chains) {
3027         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3028             $cmdlist .= "destroy $chain\n";
3029         }
3030     }
3031
3032     foreach my $chain (sort keys %$ruleset) {
3033         my $stat = $statushash->{$chain};
3034         die "internal error" if !$stat;
3035
3036         if ($stat->{action} eq 'create') {
3037             foreach my $cmd (@{$ruleset->{$chain}}) {
3038                 $cmdlist .= "$cmd\n";
3039             }
3040         }
3041
3042         if ($stat->{action} eq 'update') {
3043             my $chain_swap = $chain."_swap";
3044
3045             foreach my $cmd (@{$ruleset->{$chain}}) {
3046                 $cmd =~ s/$chain/$chain_swap/;
3047                 $cmdlist .= "$cmd\n";
3048             }
3049             $cmdlist .= "swap $chain_swap $chain\n";
3050             $cmdlist .= "flush $chain_swap\n";
3051             $cmdlist .= "destroy $chain_swap\n";
3052         }
3053
3054     }
3055
3056     foreach my $chain (keys %$statushash) {
3057         next if $statushash->{$chain}->{action} ne 'delete';
3058
3059         $delete_cmdlist .= "flush $chain\n";
3060         $delete_cmdlist .= "destroy $chain\n";
3061     }
3062
3063     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3064
3065     return ($cmdlist, $delete_cmdlist, $changes);
3066 }
3067
3068 sub apply_ruleset {
3069     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3070
3071     enable_bridge_firewall();
3072
3073     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3074         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3075
3076     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3077
3078     if ($verbose) {
3079         if ($ipset_changes) {
3080             print "ipset changes:\n";
3081             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3082             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3083         }
3084
3085         if ($changes) {
3086             print "iptables changes:\n";
3087             print $cmdlist;
3088         }
3089     }
3090
3091     ipset_restore_cmdlist($ipset_create_cmdlist);
3092
3093     iptables_restore_cmdlist($cmdlist);
3094
3095     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3096
3097     # test: re-read status and check if everything is up to date
3098     my $active_chains = iptables_get_chains();
3099     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3100
3101     my $errors;
3102     foreach my $chain (sort keys %$ruleset) {
3103         my $stat = $statushash->{$chain};
3104         if ($stat->{action} ne 'exists') {
3105             warn "unable to update chain '$chain'\n";
3106             $errors = 1;
3107         }
3108     }
3109
3110     die "unable to apply firewall changes\n" if $errors;
3111
3112     update_nf_conntrack_max($hostfw_conf);
3113
3114     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3115
3116 }
3117
3118 sub update_nf_conntrack_max {
3119     my ($hostfw_conf) = @_;
3120
3121     my $max = 65536; # reasonable default
3122
3123     my $options = $hostfw_conf->{options} || {};
3124
3125     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3126         $max = $options->{nf_conntrack_max};
3127         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3128     }
3129
3130     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3131     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3132
3133     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3134
3135     if ($current != $max) {
3136         my $hashsize = int($max/4);
3137         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3138         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3139     }
3140 }
3141
3142 sub update_nf_conntrack_tcp_timeout_established {
3143     my ($hostfw_conf) = @_;
3144
3145     my $options = $hostfw_conf->{options} || {};
3146
3147     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3148
3149     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3150 }
3151
3152 sub remove_pvefw_chains {
3153
3154     my ($chash, $hooks) = iptables_get_chains();
3155     my $cmdlist = "*filter\n";
3156
3157     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3158         if ($hooks->{$h}) {
3159             $cmdlist .= "-D $h -j PVEFW-$h\n";
3160         }
3161     }
3162
3163     foreach my $chain (keys %$chash) {
3164         $cmdlist .= "-F $chain\n";
3165     }
3166
3167     foreach my $chain (keys %$chash) {
3168         $cmdlist .= "-X $chain\n";
3169     }
3170     $cmdlist .= "COMMIT\n";
3171
3172     iptables_restore_cmdlist($cmdlist);
3173 }
3174
3175 sub init {
3176     my $cluster_conf = load_clusterfw_conf();
3177     my $cluster_options = $cluster_conf->{options};
3178     my $enable = $cluster_options->{enable};
3179
3180     return if !$enable;
3181
3182     # load required modules here
3183 }
3184
3185 sub update {
3186     my $code = sub {
3187
3188         my $cluster_conf = load_clusterfw_conf();
3189         my $cluster_options = $cluster_conf->{options};
3190
3191         my $enable = $cluster_options->{enable};
3192
3193         die "Firewall is disabled - cannot start\n" if !$enable;
3194
3195         if (!$enable) {
3196             PVE::Firewall::remove_pvefw_chains();
3197             return;
3198         }
3199
3200         my $hostfw_conf = load_hostfw_conf();
3201
3202         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3203
3204         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3205     };
3206
3207     run_locked($code);
3208 }
3209
3210 1;