src/PVE/Firewall.pm

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