PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use Data::Dumper;
   6 use Digest::SHA;
   7 use PVE::Tools;
   8 use PVE::QemuServer;
   9 use File::Path;
  10 use IO::File;
  11 use Net::IP;
  12 use PVE::Tools qw(run_command lock_file);
  13
  14 use Data::Dumper;
  15
  16 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  17
  18 # imported/converted from: /usr/share/shorewall/macro.*
  19 my $pve_fw_macros = {
  20     'Amanda' => [
  21         { action => 'PARAM', proto => 'udp', dport => '10080' },
  22         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  23     ],
  24     'Auth' => [
  25         { action => 'PARAM', proto => 'tcp', dport => '113' },
  26     ],
  27     'BGP' => [
  28         { action => 'PARAM', proto => 'tcp', dport => '179' },
  29     ],
  30     'BitTorrent' => [
  31         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
  32         { action => 'PARAM', proto => 'udp', dport => '6881' },
  33     ],
  34     'BitTorrent32' => [
  35         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
  36         { action => 'PARAM', proto => 'udp', dport => '6881' },
  37     ],
  38     'CVS' => [
  39         { action => 'PARAM', proto => 'tcp', dport => '2401' },
  40     ],
  41     'Citrix' => [
  42         { action => 'PARAM', proto => 'tcp', dport => '1494' },
  43         { action => 'PARAM', proto => 'udp', dport => '1604' },
  44         { action => 'PARAM', proto => 'tcp', dport => '2598' },
  45     ],
  46     'DAAP' => [
  47         { action => 'PARAM', proto => 'tcp', dport => '3689' },
  48         { action => 'PARAM', proto => 'udp', dport => '3689' },
  49     ],
  50     'DCC' => [
  51         { action => 'PARAM', proto => 'tcp', dport => '6277' },
  52     ],
  53     'DHCPfwd' => [
  54         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
  55         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
  56     ],
  57     'DNS' => [
  58         { action => 'PARAM', proto => 'udp', dport => '53' },
  59         { action => 'PARAM', proto => 'tcp', dport => '53' },
  60     ],
  61     'Distcc' => [
  62         { action => 'PARAM', proto => 'tcp', dport => '3632' },
  63     ],
  64     'Edonkey' => [
  65         { action => 'PARAM', proto => 'tcp', dport => '4662' },
  66         { action => 'PARAM', proto => 'udp', dport => '4665' },
  67     ],
  68     'FTP' => [
  69         { action => 'PARAM', proto => 'tcp', dport => '21' },
  70     ],
  71     'Finger' => [
  72         { action => 'PARAM', proto => 'tcp', dport => '79' },
  73     ],
  74     'GNUnet' => [
  75         { action => 'PARAM', proto => 'tcp', dport => '2086' },
  76         { action => 'PARAM', proto => 'udp', dport => '2086' },
  77         { action => 'PARAM', proto => 'tcp', dport => '1080' },
  78         { action => 'PARAM', proto => 'udp', dport => '1080' },
  79     ],
  80     'GRE' => [
  81         { action => 'PARAM', proto => '47' },
  82         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
  83     ],
  84     'Git' => [
  85         { action => 'PARAM', proto => 'tcp', dport => '9418' },
  86     ],
  87     'Gnutella' => [
  88         { action => 'PARAM', proto => 'tcp', dport => '6346' },
  89         { action => 'PARAM', proto => 'udp', dport => '6346' },
  90     ],
  91     'HKP' => [
  92         { action => 'PARAM', proto => 'tcp', dport => '11371' },
  93     ],
  94     'HTTP' => [
  95         { action => 'PARAM', proto => 'tcp', dport => '80' },
  96     ],
  97     'HTTPS' => [
  98         { action => 'PARAM', proto => 'tcp', dport => '443' },
  99     ],
 100     'ICPV2' => [
 101         { action => 'PARAM', proto => 'udp', dport => '3130' },
 102     ],
 103     'ICQ' => [
 104         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 105     ],
 106     'IMAP' => [
 107         { action => 'PARAM', proto => 'tcp', dport => '143' },
 108     ],
 109     'IMAPS' => [
 110         { action => 'PARAM', proto => 'tcp', dport => '993' },
 111     ],
 112     'IPIP' => [
 113         { action => 'PARAM', proto => '94' },
 114         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 115     ],
 116     'IPP' => [
 117         { action => 'PARAM', proto => 'tcp', dport => '631' },
 118     ],
 119     'IPPbrd' => [
 120         { action => 'PARAM', proto => 'udp', dport => '631' },
 121     ],
 122     'IPPserver' => [
 123         { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
 124         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
 125     ],
 126     'IPsec' => [
 127         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 128         { action => 'PARAM', proto => '50' },
 129         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 130         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 131     ],
 132     'IPsecah' => [
 133         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 134         { action => 'PARAM', proto => '51' },
 135         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 136         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 137     ],
 138     'IPsecnat' => [
 139         { action => 'PARAM', proto => 'udp', dport => '500' },
 140         { action => 'PARAM', proto => 'udp', dport => '4500' },
 141         { action => 'PARAM', proto => '50' },
 142         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 143         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 144         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 145     ],
 146     'IRC' => [
 147         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 148     ],
 149     'JabberPlain' => [
 150         { action => 'PARAM', proto => 'tcp', dport => '5222' },
 151     ],
 152     'JabberSecure' => [
 153         { action => 'PARAM', proto => 'tcp', dport => '5223' },
 154     ],
 155     'Jabberd' => [
 156         { action => 'PARAM', proto => 'tcp', dport => '5269' },
 157     ],
 158     'Jetdirect' => [
 159         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 160     ],
 161     'L2TP' => [
 162         { action => 'PARAM', proto => 'udp', dport => '1701' },
 163         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 164     ],
 165     'LDAP' => [
 166         { action => 'PARAM', proto => 'tcp', dport => '389' },
 167     ],
 168     'LDAPS' => [
 169         { action => 'PARAM', proto => 'tcp', dport => '636' },
 170     ],
 171     'MSNP' => [
 172         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 173     ],
 174     'MSSQL' => [
 175         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 176     ],
 177     'Mail' => [
 178         { action => 'PARAM', proto => 'tcp', dport => '25' },
 179         { action => 'PARAM', proto => 'tcp', dport => '465' },
 180         { action => 'PARAM', proto => 'tcp', dport => '587' },
 181     ],
 182     'Munin' => [
 183         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 184     ],
 185     'MySQL' => [
 186         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 187     ],
 188     'NNTP' => [
 189         { action => 'PARAM', proto => 'tcp', dport => '119' },
 190     ],
 191     'NNTPS' => [
 192         { action => 'PARAM', proto => 'tcp', dport => '563' },
 193     ],
 194     'NTP' => [
 195         { action => 'PARAM', proto => 'udp', dport => '123' },
 196     ],
 197     'NTPbi' => [
 198         { action => 'PARAM', proto => 'udp', dport => '123' },
 199         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 200     ],
 201     'NTPbrd' => [
 202         { action => 'PARAM', proto => 'udp', dport => '123' },
 203         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
 204     ],
 205     'OSPF' => [
 206         { action => 'PARAM', proto => '89' },
 207     ],
 208     'OpenVPN' => [
 209         { action => 'PARAM', proto => 'udp', dport => '1194' },
 210     ],
 211     'PCA' => [
 212         { action => 'PARAM', proto => 'udp', dport => '5632' },
 213         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 214     ],
 215     'POP3' => [
 216         { action => 'PARAM', proto => 'tcp', dport => '110' },
 217     ],
 218     'POP3S' => [
 219         { action => 'PARAM', proto => 'tcp', dport => '995' },
 220     ],
 221     'PPtP' => [
 222         { action => 'PARAM', proto => '47' },
 223         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 224         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 225     ],
 226     'Ping' => [
 227         { action => 'PARAM', proto => 'icmp', dport => '8' },
 228     ],
 229     'PostgreSQL' => [
 230         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 231     ],
 232     'Printer' => [
 233         { action => 'PARAM', proto => 'tcp', dport => '515' },
 234     ],
 235     'RDP' => [
 236         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 237     ],
 238     'RIPbi' => [
 239         { action => 'PARAM', proto => 'udp', dport => '520' },
 240         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 241     ],
 242     'RNDC' => [
 243         { action => 'PARAM', proto => 'tcp', dport => '953' },
 244     ],
 245     'Razor' => [
 246         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 247     ],
 248     'Rdate' => [
 249         { action => 'PARAM', proto => 'tcp', dport => '37' },
 250     ],
 251     'Rsync' => [
 252         { action => 'PARAM', proto => 'tcp', dport => '873' },
 253     ],
 254     'SANE' => [
 255         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 256     ],
 257     'SMB' => [
 258         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 259         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 260         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 261         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 262     ],
 263     'SMBBI' => [
 264         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 265         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 266         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 267         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 268         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 269         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 270         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 271         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 272     ],
 273     'SMBswat' => [
 274         { action => 'PARAM', proto => 'tcp', dport => '901' },
 275     ],
 276     'SMTP' => [
 277         { action => 'PARAM', proto => 'tcp', dport => '25' },
 278     ],
 279     'SMTPS' => [
 280         { action => 'PARAM', proto => 'tcp', dport => '465' },
 281     ],
 282     'SNMP' => [
 283         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 284         { action => 'PARAM', proto => 'tcp', dport => '161' },
 285     ],
 286     'SPAMD' => [
 287         { action => 'PARAM', proto => 'tcp', dport => '783' },
 288     ],
 289     'SSH' => [
 290         { action => 'PARAM', proto => 'tcp', dport => '22' },
 291     ],
 292     'SVN' => [
 293         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 294     ],
 295     'SixXS' => [
 296         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 297         { action => 'PARAM', proto => 'udp', dport => '3740' },
 298         { action => 'PARAM', proto => '41' },
 299         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 300     ],
 301     'Squid' => [
 302         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 303     ],
 304     'Submission' => [
 305         { action => 'PARAM', proto => 'tcp', dport => '587' },
 306     ],
 307     'Syslog' => [
 308         { action => 'PARAM', proto => 'udp', dport => '514' },
 309         { action => 'PARAM', proto => 'tcp', dport => '514' },
 310     ],
 311     'TFTP' => [
 312         { action => 'PARAM', proto => 'udp', dport => '69' },
 313     ],
 314     'Telnet' => [
 315         { action => 'PARAM', proto => 'tcp', dport => '23' },
 316     ],
 317     'Telnets' => [
 318         { action => 'PARAM', proto => 'tcp', dport => '992' },
 319     ],
 320     'Time' => [
 321         { action => 'PARAM', proto => 'tcp', dport => '37' },
 322     ],
 323     'Trcrt' => [
 324         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 325         { action => 'PARAM', proto => 'icmp', dport => '8' },
 326     ],
 327     'VNC' => [
 328         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 329     ],
 330     'VNCL' => [
 331         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 332     ],
 333     'Web' => [
 334         { action => 'PARAM', proto => 'tcp', dport => '80' },
 335         { action => 'PARAM', proto => 'tcp', dport => '443' },
 336     ],
 337     'Webcache' => [
 338         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 339     ],
 340     'Webmin' => [
 341         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 342     ],
 343     'Whois' => [
 344         { action => 'PARAM', proto => 'tcp', dport => '43' },
 345     ],
 346 };
 347
 348 my $pve_fw_parsed_macros;
 349 my $pve_fw_preferred_macro_names = {};
 350
 351 # iptables -p icmp -h
 352 my $icmp_type_names = {
 353     any => 1,
 354     'echo-reply' => 1,
 355     'destination-unreachable' => 1,
 356     'network-unreachable' => 1,
 357     'host-unreachable' => 1,
 358     'protocol-unreachable' => 1,
 359     'port-unreachable' => 1,
 360     'fragmentation-needed' => 1,
 361     'source-route-failed' => 1,
 362     'network-unknown' => 1,
 363     'host-unknown' => 1,
 364     'network-prohibited' => 1,
 365     'host-prohibited' => 1,
 366     'TOS-network-unreachable' => 1,
 367     'TOS-host-unreachable' => 1,
 368     'communication-prohibited' => 1,
 369     'host-precedence-violation' => 1,
 370     'precedence-cutoff' => 1,
 371     'source-quench' => 1,
 372     'redirect' => 1,
 373     'network-redirect' => 1,
 374     'host-redirect' => 1,
 375     'TOS-network-redirect' => 1,
 376     'TOS-host-redirect' => 1,
 377     'echo-request' => 1,
 378     'router-advertisement' => 1,
 379     'router-solicitation' => 1,
 380     'time-exceeded' => 1,
 381     'ttl-zero-during-transit' => 1,
 382     'ttl-zero-during-reassembly' => 1,
 383     'parameter-problem' => 1,
 384     'ip-header-bad' => 1,
 385     'required-option-missing' => 1,
 386     'timestamp-request' => 1,
 387     'timestamp-reply' => 1,
 388     'address-mask-request' => 1,
 389     'address-mask-reply' => 1,
 390 };
 391
 392 sub get_firewall_macros {
 393
 394     return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
 395
 396     $pve_fw_parsed_macros = {};
 397
 398     foreach my $k (keys %$pve_fw_macros) {
 399         my $name = lc($k);
 400
 401         my $macro =  $pve_fw_macros->{$k};
 402         $pve_fw_preferred_macro_names->{$name} = $k;
 403         $pve_fw_parsed_macros->{$name} = $macro;
 404     }
 405
 406     return $pve_fw_parsed_macros;
 407 }
 408
 409 my $etc_services;
 410
 411 sub get_etc_services {
 412
 413     return $etc_services if $etc_services;
 414
 415     my $filename = "/etc/services";
 416
 417     my $fh = IO::File->new($filename, O_RDONLY);
 418     if (!$fh) {
 419         warn "unable to read '$filename' - $!\n";
 420         return {};
 421     }
 422
 423     my $services = {};
 424
 425     while (my $line = <$fh>) {
 426         chomp ($line);
 427         next if $line =~m/^#/;
 428         next if ($line =~m/^\s*$/);
 429
 430         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 431             $services->{byid}->{$2}->{name} = $1;
 432             $services->{byid}->{$2}->{port} = $2;
 433             $services->{byid}->{$2}->{$3} = 1;
 434             $services->{byname}->{$1} = $services->{byid}->{$2};
 435         }
 436     }
 437
 438     close($fh);
 439
 440     $etc_services = $services;
 441
 442
 443     return $etc_services;
 444 }
 445
 446 my $etc_protocols;
 447
 448 sub get_etc_protocols {
 449     return $etc_protocols if $etc_protocols;
 450
 451     my $filename = "/etc/protocols";
 452
 453     my $fh = IO::File->new($filename, O_RDONLY);
 454     if (!$fh) {
 455         warn "unable to read '$filename' - $!\n";
 456         return {};
 457     }
 458
 459     my $protocols = {};
 460
 461     while (my $line = <$fh>) {
 462         chomp ($line);
 463         next if $line =~m/^#/;
 464         next if ($line =~m/^\s*$/);
 465
 466         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 467             $protocols->{byid}->{$2}->{name} = $1;
 468             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 469         }
 470     }
 471
 472     close($fh);
 473
 474     $etc_protocols = $protocols;
 475
 476     return $etc_protocols;
 477 }
 478
 479 sub parse_address_list {
 480     my ($str) = @_;
 481
 482     my $nbaor = 0;
 483     foreach my $aor (split(/,/, $str)) {
 484         if (!Net::IP->new($aor)) {
 485             my $err = Net::IP::Error();
 486             die "invalid IP address: $err\n";
 487         }else{
 488             $nbaor++;
 489         }
 490     }
 491     return $nbaor;
 492 }
 493
 494 sub parse_port_name_number_or_range {
 495     my ($str) = @_;
 496
 497     my $services = PVE::Firewall::get_etc_services();
 498     my $nbports = 0;
 499     foreach my $item (split(/,/, $str)) {
 500         my $portlist = "";
 501         my $oldpon = undef;
 502         $nbports++;
 503         foreach my $pon (split(':', $item, 2)) {
 504             $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
 505             if ($pon =~ m/^\d+$/){
 506                 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
 507                 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
 508                 $oldpon = $pon;
 509             }else{
 510                 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
 511             }
 512         }
 513     }
 514
 515     return ($nbports);
 516 }
 517
 518 my $bridge_firewall_enabled = 0;
 519
 520 sub enable_bridge_firewall {
 521
 522     return if $bridge_firewall_enabled; # only once
 523
 524     system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
 525     system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
 526
 527     $bridge_firewall_enabled = 1;
 528 }
 529
 530 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 531
 532 sub iptables {
 533     my ($cmd) = @_;
 534
 535     run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
 536 }
 537
 538 sub iptables_restore_cmdlist {
 539     my ($cmdlist) = @_;
 540
 541     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 542 }
 543
 544 sub iptables_get_chains {
 545
 546     my $res = {};
 547
 548     # check what chains we want to track
 549     my $is_pvefw_chain = sub {
 550         my $name = shift;
 551
 552         return 1 if $name =~ m/^PVEFW-\S+$/;
 553
 554         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
 555         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
 556         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
 557
 558         return undef;
 559     };
 560
 561     my $table = '';
 562
 563     my $parser = sub {
 564         my $line = shift;
 565
 566         return if $line =~ m/^#/;
 567         return if $line =~ m/^\s*$/;
 568
 569         if ($line =~ m/^\*(\S+)$/) {
 570             $table = $1;
 571             return;
 572         }
 573
 574         return if $table ne 'filter';
 575
 576         if ($line =~ m/^:(\S+)\s/) {
 577             my $chain = $1;
 578             return if !&$is_pvefw_chain($chain);
 579             $res->{$chain} = "unknown";
 580         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
 581             my ($chain, $sig) = ($1, $2);
 582             return if !&$is_pvefw_chain($chain);
 583             $res->{$chain} = $sig;
 584         } else {
 585             # simply ignore the rest
 586             return;
 587         }
 588     };
 589
 590     run_command("/sbin/iptables-save", outfunc => $parser);
 591
 592     return $res;
 593 }
 594
 595 sub iptables_chain_exist {
 596     my ($chain) = @_;
 597
 598     eval{
 599         iptables("-n --list $chain");
 600     };
 601     return undef if $@;
 602
 603     return 1;
 604 }
 605
 606 sub iptables_rule_exist {
 607     my ($rule) = @_;
 608
 609     eval{
 610         iptables("-C $rule");
 611     };
 612     return undef if $@;
 613
 614     return 1;
 615 }
 616
 617 sub ruleset_generate_rule {
 618     my ($ruleset, $chain, $rule, $goto) = @_;
 619
 620     my $cmd = '';
 621
 622     $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
 623     $cmd .= " -s $rule->{source}" if $rule->{source};
 624     $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
 625     $cmd .= " -d $rule->{dest}" if $rule->{dest};
 626     $cmd .= " -p $rule->{proto}" if $rule->{proto};
 627
 628     if (($rule->{nbdport} && $rule->{nbdport} > 1) ||
 629         ($rule->{nbsport} && $rule->{nbsport} > 1)) {
 630         $cmd .= " --match multiport"
 631     }
 632
 633     if ($rule->{dport}) {
 634         if ($rule->{proto} && $rule->{proto} eq 'icmp') {
 635             # Note: we use dport to store --icmp-type
 636             die "unknown icmp-type\n" if !$icmp_type_names->{$rule->{dport}};
 637             $cmd .= " -m icmp --icmp-type $rule->{dport}";
 638         } else {
 639             if ($rule->{nbdport} && $rule->{nbdport} > 1) {
 640                 $cmd .= " --dports $rule->{dport}";
 641             } else {
 642                 $cmd .= " --dport $rule->{dport}";
 643             }
 644         }
 645     }
 646
 647     if ($rule->{sport}) {
 648         if ($rule->{nbsport} && $rule->{nbsport} > 1) {
 649             $cmd .= " --sports $rule->{sport}";
 650         } else {
 651             $cmd .= " --sport $rule->{sport}";
 652         }
 653     }
 654
 655     $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
 656
 657     if (my $action = $rule->{action}) {
 658         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
 659         $cmd .= $goto ? " -g $action" : " -j $action";
 660     };
 661
 662     ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
 663 }
 664
 665 sub ruleset_create_chain {
 666     my ($ruleset, $chain) = @_;
 667
 668     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
 669
 670     die "chain '$chain' already exists\n" if $ruleset->{$chain};
 671
 672     $ruleset->{$chain} = [];
 673 }
 674
 675 sub ruleset_chain_exist {
 676     my ($ruleset, $chain) = @_;
 677
 678     return $ruleset->{$chain} ? 1 : undef;
 679 }
 680
 681 sub ruleset_addrule {
 682    my ($ruleset, $chain, $rule) = @_;
 683
 684    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 685
 686    push @{$ruleset->{$chain}}, "-A $chain $rule";
 687 }
 688
 689 sub ruleset_insertrule {
 690    my ($ruleset, $chain, $rule) = @_;
 691
 692    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 693
 694    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
 695 }
 696
 697 sub generate_bridge_chains {
 698     my ($ruleset, $bridge) = @_;
 699
 700     if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
 701         ruleset_create_chain($ruleset, "PVEFW-FORWARD");
 702         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 703     }
 704
 705     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
 706         ruleset_create_chain($ruleset, "$bridge-FW");
 707         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
 708         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
 709         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");  # disable interbridge routing
 710         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
 711     }
 712
 713     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
 714         ruleset_create_chain($ruleset, "$bridge-OUT");
 715         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
 716     }
 717
 718     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
 719         ruleset_create_chain($ruleset, "$bridge-IN");
 720         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
 721         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
 722     }
 723 }
 724
 725 sub generate_tap_rules_direction {
 726     my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
 727
 728     my $rules = $vmfw_conf->{lc($direction)};
 729     my $options = $vmfw_conf->{options};
 730
 731     my $tapchain = "$iface-$direction";
 732
 733     ruleset_create_chain($ruleset, $tapchain);
 734
 735     ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
 736     ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 737
 738     if ($direction eq 'OUT' && defined($macaddr)) {
 739         ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
 740     }
 741
 742     if ($rules) {
 743         foreach my $rule (@$rules) {
 744             next if $rule->{iface} && $rule->{iface} ne $netid;
 745             # we go to $bridge-IN if accept in out rules
 746             if($rule->{action}  =~ m/^(GROUP-(\S+))$/){
 747                 $rule->{action} .= "-$direction";
 748                 # generate empty group rule if don't exist
 749                 if(!ruleset_chain_exist($ruleset, $rule->{action})){
 750                     generate_group_rules($ruleset, $group_rules, $2);
 751                 }
 752                 ruleset_generate_rule($ruleset, $tapchain, $rule);
 753                 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
 754                     if $direction eq 'OUT';
 755             } else {
 756                 $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
 757                 ruleset_generate_rule($ruleset, $tapchain, $rule);
 758             }
 759         }
 760     }
 761
 762     # implement policy
 763     my $policy;
 764
 765     if ($direction eq 'OUT') {
 766         $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
 767     } else {
 768         $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
 769     }
 770
 771     if ($policy eq 'ACCEPT') {
 772         if ($direction eq 'OUT') {
 773             ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
 774         } else {
 775             ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
 776         }
 777     } elsif ($policy eq 'DROP') {
 778         ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
 779         ruleset_addrule($ruleset, $tapchain, "-j DROP");
 780     } elsif ($policy eq 'REJECT') {
 781         ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
 782         ruleset_addrule($ruleset, $tapchain, "-j REJECT");
 783     } else {
 784         # should not happen
 785         die "internal error: unknown policy '$policy'";
 786     }
 787
 788     # plug the tap chain to bridge chain
 789     my $physdevdirection = $direction eq 'IN' ? "out" : "in";
 790     my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
 791     ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
 792
 793     if ($direction eq 'OUT'){
 794         # add tap->host rules
 795         my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
 796         ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
 797     }
 798 }
 799
 800 sub enablehostfw {
 801     my ($ruleset, $rules, $group_rules) = @_;
 802
 803     # fixme: allow security groups
 804
 805     # host inbound firewall
 806     my $chain = "PVEFW-HOST-IN";
 807     ruleset_create_chain($ruleset, $chain);
 808
 809     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
 810     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 811     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
 812     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
 813     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
 814     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
 815
 816     if ($rules->{in}) {
 817         foreach my $rule (@{$rules->{in}}) {
 818             # we use RETURN because we need to check also tap rules
 819             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 820             ruleset_generate_rule($ruleset, $chain, $rule);
 821         }
 822     }
 823
 824     ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
 825     ruleset_addrule($ruleset, $chain, "-j DROP");
 826
 827     # host outbound firewall
 828     $chain = "PVEFW-HOST-OUT";
 829     ruleset_create_chain($ruleset, $chain);
 830
 831     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
 832     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 833     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
 834     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
 835     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
 836     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 837
 838     if ($rules->{out}) {
 839         foreach my $rule (@{$rules->{out}}) {
 840             # we use RETURN because we need to check also tap rules
 841             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 842             ruleset_generate_rule($ruleset, $chain, $rule);
 843         }
 844     }
 845
 846     ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
 847     ruleset_addrule($ruleset, $chain, "-j DROP");
 848
 849     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
 850     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
 851 }
 852
 853 sub generate_group_rules {
 854     my ($ruleset, $group_rules, $group) = @_;
 855
 856     my $rules = $group_rules->{$group};
 857
 858     die "no such security group '$group'\n" if !$rules;
 859
 860     my $chain = "GROUP-${group}-IN";
 861
 862     ruleset_create_chain($ruleset, $chain);
 863
 864     if ($rules->{in}) {
 865         foreach my $rule (@{$rules->{in}}) {
 866             ruleset_generate_rule($ruleset, $chain, $rule);
 867         }
 868     }
 869
 870     $chain = "GROUP-${group}-OUT";
 871
 872     ruleset_create_chain($ruleset, $chain);
 873     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
 874
 875     if ($rules->{out}) {
 876         foreach my $rule (@{$rules->{out}}) {
 877             # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
 878             # check also other tap rules (and group rules can be set on any bridge,
 879             # so we can't go to VMBRXX-IN)
 880             $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
 881             ruleset_generate_rule($ruleset, $chain, $rule);
 882         }
 883     }
 884 }
 885
 886 my $MAX_NETS = 32;
 887 my $valid_netdev_names = {};
 888 for (my $i = 0; $i < $MAX_NETS; $i++)  {
 889     $valid_netdev_names->{"net$i"} = 1;
 890 }
 891
 892 sub parse_fw_rule {
 893     my ($line, $need_iface, $allow_groups) = @_;
 894
 895     my $macros = get_firewall_macros();
 896     my $protocols = get_etc_protocols();
 897
 898     my ($action, $iface, $source, $dest, $proto, $dport, $sport);
 899
 900     $line =~ s/#.*$//;
 901
 902     my @data = split(/\s+/, $line);
 903     my $expected_elements = $need_iface ? 7 : 6;
 904
 905     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
 906
 907     if ($need_iface) {
 908         ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
 909     } else {
 910         ($action, $source, $dest, $proto, $dport, $sport) =  @data;
 911     }
 912
 913     die "incomplete rule\n" if !$action;
 914
 915     my $macro;
 916     my $macro_name;
 917
 918     if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
 919         # OK
 920     } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
 921         # OK
 922     } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
 923         ($macro_name, $action) = ($1, $2);
 924         my $lc_macro_name = lc($macro_name);
 925         my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
 926         $macro_name = $preferred_name if $preferred_name;
 927         $macro = $macros->{$lc_macro_name};
 928         die "unknown macro '$macro_name'\n" if !$macro;
 929     } else {
 930         die "unknown action '$action'\n";
 931     }
 932
 933     if ($need_iface) {
 934         $iface = undef if $iface && $iface eq '-';
 935         die "unknown interface '$iface'\n"
 936             if defined($iface) && !$valid_netdev_names->{$iface};
 937     }
 938
 939     $proto = undef if $proto && $proto eq '-';
 940     die "unknown protokol '$proto'\n" if $proto &&
 941         !(defined($protocols->{byname}->{$proto}) ||
 942           defined($protocols->{byid}->{$proto}));
 943
 944     $source = undef if $source && $source eq '-';
 945     $dest = undef if $dest && $dest eq '-';
 946
 947     $dport = undef if $dport && $dport eq '-';
 948     $sport = undef if $sport && $sport eq '-';
 949
 950     my $nbsource = undef;
 951     my $nbdest = undef;
 952
 953     $nbsource = parse_address_list($source) if $source;
 954     $nbdest = parse_address_list($dest) if $dest;
 955
 956     my $rules = [];
 957
 958     my $param = {
 959         action => $action,
 960         iface => $iface,
 961         source => $source,
 962         dest => $dest,
 963         nbsource => $nbsource,
 964         nbdest => $nbdest,
 965         proto => $proto,
 966         dport => $dport,
 967         sport => $sport,
 968     };
 969
 970     if ($macro) {
 971         foreach my $templ (@$macro) {
 972             my $rule = {};
 973             foreach my $k (keys %$templ) {
 974                 my $v = $templ->{$k};
 975                 if ($v eq 'PARAM') {
 976                     $v = $param->{$k};
 977                 } elsif ($v eq 'DEST') {
 978                     $v = $param->{dest};
 979                 } elsif ($v eq 'SOURCE') {
 980                     $v = $param->{source};
 981                 }
 982
 983                 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
 984                 $rule->{$k} = $v;
 985             }
 986             push @$rules, $rule;
 987         }
 988     } else {
 989         push @$rules, $param;
 990     }
 991
 992     foreach my $rule (@$rules) {
 993         $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
 994             if defined($rule->{dport});
 995         $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
 996             if defined($rule->{sport});
 997     }
 998
 999     return $rules;
1000 }
1001
1002 sub parse_fw_option {
1003     my ($line) = @_;
1004
1005     my ($opt, $value);
1006
1007     if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
1008         $opt = 'enable';
1009         $value = int($1);
1010     } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1011         $opt = lc($1);
1012         $value = uc($3);
1013      } else {
1014         chomp $line;
1015         die "can't parse option '$line'\n"
1016     }
1017
1018     return ($opt, $value);
1019 }
1020
1021 sub parse_vm_fw_rules {
1022     my ($filename, $fh) = @_;
1023
1024     my $res = { in => [], out => [], options => {}};
1025
1026     my $section;
1027
1028     while (defined(my $line = <$fh>)) {
1029         next if $line =~ m/^#/;
1030         next if $line =~ m/^\s*$/;
1031
1032         my $linenr = $fh->input_line_number();
1033         my $prefix = "$filename (line $linenr)";
1034
1035         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1036             $section = lc($1);
1037             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1038             next;
1039         }
1040         if (!$section) {
1041             warn "$prefix: skip line - no section";
1042             next;
1043         }
1044
1045         next if !$res->{$section}; # skip undefined section
1046
1047         if ($section eq 'options') {
1048             eval {
1049                 my ($opt, $value) = parse_fw_option($line);
1050                 $res->{options}->{$opt} = $value;
1051             };
1052             warn "$prefix: $@" if $@;
1053             next;
1054         }
1055
1056         my $rules;
1057         eval { $rules = parse_fw_rule($line, 1, 1); };
1058         if (my $err = $@) {
1059             warn "$prefix: $err";
1060             next;
1061         }
1062
1063         push @{$res->{$section}}, @$rules;
1064     }
1065
1066     return $res;
1067 }
1068
1069 sub parse_host_fw_rules {
1070     my ($filename, $fh) = @_;
1071
1072     my $res = { in => [], out => [] };
1073
1074     my $section;
1075
1076     while (defined(my $line = <$fh>)) {
1077         next if $line =~ m/^#/;
1078         next if $line =~ m/^\s*$/;
1079
1080         my $linenr = $fh->input_line_number();
1081         my $prefix = "$filename (line $linenr)";
1082
1083         if ($line =~ m/^\[(in|out)\]\s*$/i) {
1084             $section = lc($1);
1085             next;
1086         }
1087         if (!$section) {
1088             warn "$prefix: skip line - no section";
1089             next;
1090         }
1091
1092         my $rules;
1093         eval { $rules = parse_fw_rule($line, 1, 1); };
1094         if (my $err = $@) {
1095             warn "$prefix: $err";
1096             next;
1097         }
1098
1099         push @{$res->{$section}}, @$rules;
1100     }
1101
1102     return $res;
1103 }
1104
1105 sub parse_group_fw_rules {
1106     my ($filename, $fh) = @_;
1107
1108     my $section;
1109     my $group;
1110
1111     my $res = { in => [], out => [] };
1112
1113     while (defined(my $line = <$fh>)) {
1114         next if $line =~ m/^#/;
1115         next if $line =~ m/^\s*$/;
1116
1117         my $linenr = $fh->input_line_number();
1118         my $prefix = "$filename (line $linenr)";
1119
1120         if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1121             $section = lc($1);
1122             $group = lc($2);
1123             next;
1124         }
1125         if (!$section || !$group) {
1126             warn "$prefix: skip line - no section";
1127             next;
1128         }
1129
1130         my $rules;
1131         eval { $rules = parse_fw_rule($line, 0, 0); };
1132         if (my $err = $@) {
1133             warn "$prefix: $err";
1134             next;
1135         }
1136
1137         push @{$res->{$group}->{$section}}, @$rules;
1138     }
1139
1140     return $res;
1141 }
1142
1143 sub run_locked {
1144     my ($code, @param) = @_;
1145
1146     my $timeout = 10;
1147
1148     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1149
1150     die $@ if $@;
1151
1152     return $res;
1153 }
1154
1155 sub read_local_vm_config {
1156
1157     my $openvz = {};
1158
1159     my $qemu = {};
1160
1161     my $list = PVE::QemuServer::config_list();
1162
1163     foreach my $vmid (keys %$list) {
1164         my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1165         if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1166             $qemu->{$vmid} = $conf;
1167         }
1168     }
1169
1170     my $vmdata = { openvz => $openvz, qemu => $qemu };
1171
1172     return $vmdata;
1173 };
1174
1175 sub read_vm_firewall_rules {
1176     my ($vmdata) = @_;
1177     my $rules = {};
1178     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1179         my $filename = "/etc/pve/firewall/$vmid.fw";
1180         my $fh = IO::File->new($filename, O_RDONLY);
1181         next if !$fh;
1182
1183         $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
1184     }
1185
1186     return $rules;
1187 }
1188
1189 sub compile {
1190     my $vmdata = read_local_vm_config();
1191     my $rules = read_vm_firewall_rules($vmdata);
1192
1193     my $group_rules = {};
1194     my $filename = "/etc/pve/firewall/groups.fw";
1195     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1196         $group_rules = parse_group_fw_rules($filename, $fh);
1197     }
1198
1199     #print Dumper($rules);
1200
1201     my $ruleset = {};
1202
1203     ruleset_create_chain($ruleset, "PVEFW-INPUT");
1204     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
1205     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
1206
1207     ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK");
1208     ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
1209
1210     my $enable_hostfw = 0;
1211     $filename = "/etc/pve/local/host.fw";
1212     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1213         my $host_rules = parse_host_fw_rules($filename, $fh);
1214
1215         $enable_hostfw = 1;
1216
1217         enablehostfw($ruleset, $host_rules, $group_rules);
1218     }
1219
1220     # generate firewall rules for QEMU VMs
1221     foreach my $vmid (keys %{$vmdata->{qemu}}) {
1222         my $conf = $vmdata->{qemu}->{$vmid};
1223         my $vmfw_conf = $rules->{$vmid};
1224         next if !$vmfw_conf;
1225         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1226
1227         foreach my $netid (keys %$conf) {
1228             next if $netid !~ m/^net(\d+)$/;
1229             my $net = PVE::QemuServer::parse_net($conf->{$netid});
1230             next if !$net;
1231             my $iface = "tap${vmid}i$1";
1232
1233             my $bridge = $net->{bridge};
1234             next if !$bridge; # fixme: ?
1235
1236             $bridge .= "v$net->{tag}" if $net->{tag};
1237
1238
1239             generate_bridge_chains($ruleset, $bridge);
1240
1241             my $macaddr = $net->{macaddr};
1242             generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1243             generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1244         }
1245     }
1246
1247     if ($enable_hostfw) {
1248         # allow traffic from lo (ourself)
1249         ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1250     }
1251
1252     return $ruleset;
1253 }
1254
1255 sub get_ruleset_status {
1256     my ($ruleset, $verbose) = @_;
1257
1258     my $active_chains = iptables_get_chains();
1259
1260     my $statushash = {};
1261
1262     foreach my $chain (sort keys %$ruleset) {
1263         my $digest = Digest::SHA->new('sha1');
1264         foreach my $cmd (@{$ruleset->{$chain}}) {
1265              $digest->add("$cmd\n");
1266         }
1267         my $sig = $digest->b64digest;
1268         $statushash->{$chain}->{sig} = $sig;
1269
1270         my $oldsig = $active_chains->{$chain};
1271         if (!defined($oldsig)) {
1272             $statushash->{$chain}->{action} = 'create';
1273         } else {
1274             if ($oldsig eq $sig) {
1275                 $statushash->{$chain}->{action} = 'exists';
1276             } else {
1277                 $statushash->{$chain}->{action} = 'update';
1278             }
1279         }
1280         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1281         foreach my $cmd (@{$ruleset->{$chain}}) {
1282             print "\t$cmd\n" if $verbose;
1283         }
1284     }
1285
1286     foreach my $chain (sort keys %$active_chains) {
1287         if (!defined($ruleset->{$chain})) {
1288             my $sig = $active_chains->{$chain};
1289             $statushash->{$chain}->{action} = 'delete';
1290             $statushash->{$chain}->{sig} = $sig;
1291             print "delete $chain ($sig)\n" if $verbose;
1292         }
1293     }
1294
1295     return $statushash;
1296 }
1297
1298 sub print_ruleset {
1299     my ($ruleset) = @_;
1300
1301     get_ruleset_status($ruleset, 1);
1302 }
1303
1304 sub print_sig_rule {
1305     my ($chain, $sig) = @_;
1306
1307     # We just use this to store a SHA1 checksum used to detect changes
1308     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1309 }
1310
1311 sub apply_ruleset {
1312     my ($ruleset, $verbose) = @_;
1313
1314     enable_bridge_firewall();
1315
1316     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1317
1318     my $statushash = get_ruleset_status($ruleset, $verbose);
1319
1320     # create missing chains first
1321     foreach my $chain (sort keys %$ruleset) {
1322         my $stat = $statushash->{$chain};
1323         die "internal error" if !$stat;
1324         next if $stat->{action} ne 'create';
1325
1326         $cmdlist .= ":$chain - [0:0]\n";
1327     }
1328
1329     my $rule = "INPUT -j PVEFW-INPUT";
1330     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1331         $cmdlist .= "-A $rule\n";
1332     }
1333     $rule = "OUTPUT -j PVEFW-OUTPUT";
1334     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1335         $cmdlist .= "-A $rule\n";
1336     }
1337
1338     $rule = "FORWARD -j PVEFW-FORWARD";
1339     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1340         $cmdlist .= "-A $rule\n";
1341     }
1342
1343     foreach my $chain (sort keys %$ruleset) {
1344         my $stat = $statushash->{$chain};
1345         die "internal error" if !$stat;
1346
1347         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1348             $cmdlist .= "-F $chain\n";
1349             foreach my $cmd (@{$ruleset->{$chain}}) {
1350                 $cmdlist .= "$cmd\n";
1351             }
1352             $cmdlist .= print_sig_rule($chain, $stat->{sig});
1353         } elsif ($stat->{action} eq 'delete') {
1354             die "internal error"; # this should not happen
1355         } elsif ($stat->{action} eq 'exists') {
1356             # do nothing
1357         } else {
1358             die "internal error - unknown status '$stat->{action}'";
1359         }
1360     }
1361
1362     foreach my $chain (keys %$statushash) {
1363         next if $statushash->{$chain}->{action} ne 'delete';
1364         $cmdlist .= "-F $chain\n";
1365     }
1366     foreach my $chain (keys %$statushash) {
1367         next if $statushash->{$chain}->{action} ne 'delete';
1368         next if $chain eq 'PVEFW-INPUT';
1369         next if $chain eq 'PVEFW-OUTPUT';
1370         next if $chain eq 'PVEFW-FORWARD';
1371         $cmdlist .= "-X $chain\n";
1372     }
1373
1374     $cmdlist .= "COMMIT\n";
1375
1376     print $cmdlist if $verbose;
1377
1378     iptables_restore_cmdlist($cmdlist);
1379
1380     # test: re-read status and check if everything is up to date
1381     $statushash = get_ruleset_status($ruleset);
1382
1383     my $errors;
1384     foreach my $chain (sort keys %$ruleset) {
1385         my $stat = $statushash->{$chain};
1386         if ($stat->{action} ne 'exists') {
1387             warn "unable to update chain '$chain'\n";
1388             $errors = 1;
1389         }
1390     }
1391
1392     die "unable to apply firewall changes\n" if $errors;
1393 }
1394
1395 1;