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 my $pve_std_chains = {
 352     'PVEFW-SET-ACCEPT-MARK' => [
 353         "-j MARK --set-mark 1",
 354     ],
 355     'PVEFW-DropBroadcast' => [
 356         # same as shorewall 'Broadcast'
 357         # simply DROP BROADCAST/MULTICAST/ANYCAST
 358         # we can use this to reduce logging
 359         { action => 'DROP', dsttype => 'BROADCAST' },
 360         { action => 'DROP', dsttype => 'MULTICAST' },
 361         { action => 'DROP', dsttype => 'ANYCAST' },
 362         { action => 'DROP', dest => '224.0.0.0/4' },
 363     ],
 364     'PVEFW-reject' => [
 365         # same as shorewall 'reject'
 366         { action => 'DROP', dsttype => 'BROADCAST' },
 367         { action => 'DROP', source => '224.0.0.0/4' },
 368         { action => 'DROP', proto => 'icmp' },
 369         "-p tcp -j REJECT --reject-with tcp-reset",
 370         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 371         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 372         "-j REJECT --reject-with icmp-host-prohibited",
 373     ],
 374     'PVEFW-Drop' => [
 375         # same as shorewall 'Drop', which is equal to DROP,
 376         # but REJECT/DROP some packages to reduce logging,
 377         # and ACCEPT critical ICMP types
 378         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 379         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 380         { action => 'PVEFW-DropBroadcast' },
 381         # ACCEPT critical ICMP types
 382         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 383         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 384         # Drop packets with INVALID state
 385         "-m conntrack --ctstate INVALID -j DROP",
 386         # Drop Microsoft SMB noise
 387         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 388         { action => 'DROP', proto => 'udp', dport => '137:139'},
 389         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 390         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 391         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 392         # Drop new/NotSyn traffic so that it doesn't get logged
 393         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 394         # Drop DNS replies
 395         { action => 'DROP', proto => 'udp', sport => 53 },
 396     ],
 397     'PVEFW-Reject' => [
 398         # same as shorewall 'Reject', which is equal to Reject,
 399         # but REJECT/DROP some packages to reduce logging,
 400         # and ACCEPT critical ICMP types
 401         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 402         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 403         { action => 'PVEFW-DropBroadcast' },
 404         # ACCEPT critical ICMP types
 405         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 406         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 407         # Drop packets with INVALID state
 408         "-m conntrack --ctstate INVALID -j DROP",
 409         # Drop Microsoft SMB noise
 410         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 411         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 412         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 413         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 414         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 415         # Drop new/NotSyn traffic so that it doesn't get logged
 416         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 417         # Drop DNS replies
 418         { action => 'DROP', proto => 'udp', sport => 53 },
 419     ],
 420 };
 421
 422 # iptables -p icmp -h
 423 my $icmp_type_names = {
 424     any => 1,
 425     'echo-reply' => 1,
 426     'destination-unreachable' => 1,
 427     'network-unreachable' => 1,
 428     'host-unreachable' => 1,
 429     'protocol-unreachable' => 1,
 430     'port-unreachable' => 1,
 431     'fragmentation-needed' => 1,
 432     'source-route-failed' => 1,
 433     'network-unknown' => 1,
 434     'host-unknown' => 1,
 435     'network-prohibited' => 1,
 436     'host-prohibited' => 1,
 437     'TOS-network-unreachable' => 1,
 438     'TOS-host-unreachable' => 1,
 439     'communication-prohibited' => 1,
 440     'host-precedence-violation' => 1,
 441     'precedence-cutoff' => 1,
 442     'source-quench' => 1,
 443     'redirect' => 1,
 444     'network-redirect' => 1,
 445     'host-redirect' => 1,
 446     'TOS-network-redirect' => 1,
 447     'TOS-host-redirect' => 1,
 448     'echo-request' => 1,
 449     'router-advertisement' => 1,
 450     'router-solicitation' => 1,
 451     'time-exceeded' => 1,
 452     'ttl-zero-during-transit' => 1,
 453     'ttl-zero-during-reassembly' => 1,
 454     'parameter-problem' => 1,
 455     'ip-header-bad' => 1,
 456     'required-option-missing' => 1,
 457     'timestamp-request' => 1,
 458     'timestamp-reply' => 1,
 459     'address-mask-request' => 1,
 460     'address-mask-reply' => 1,
 461 };
 462
 463 sub get_firewall_macros {
 464
 465     return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
 466
 467     $pve_fw_parsed_macros = {};
 468
 469     foreach my $k (keys %$pve_fw_macros) {
 470         my $name = lc($k);
 471
 472         my $macro =  $pve_fw_macros->{$k};
 473         $pve_fw_preferred_macro_names->{$name} = $k;
 474         $pve_fw_parsed_macros->{$name} = $macro;
 475     }
 476
 477     return $pve_fw_parsed_macros;
 478 }
 479
 480 my $etc_services;
 481
 482 sub get_etc_services {
 483
 484     return $etc_services if $etc_services;
 485
 486     my $filename = "/etc/services";
 487
 488     my $fh = IO::File->new($filename, O_RDONLY);
 489     if (!$fh) {
 490         warn "unable to read '$filename' - $!\n";
 491         return {};
 492     }
 493
 494     my $services = {};
 495
 496     while (my $line = <$fh>) {
 497         chomp ($line);
 498         next if $line =~m/^#/;
 499         next if ($line =~m/^\s*$/);
 500
 501         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 502             $services->{byid}->{$2}->{name} = $1;
 503             $services->{byid}->{$2}->{port} = $2;
 504             $services->{byid}->{$2}->{$3} = 1;
 505             $services->{byname}->{$1} = $services->{byid}->{$2};
 506         }
 507     }
 508
 509     close($fh);
 510
 511     $etc_services = $services;
 512
 513
 514     return $etc_services;
 515 }
 516
 517 my $etc_protocols;
 518
 519 sub get_etc_protocols {
 520     return $etc_protocols if $etc_protocols;
 521
 522     my $filename = "/etc/protocols";
 523
 524     my $fh = IO::File->new($filename, O_RDONLY);
 525     if (!$fh) {
 526         warn "unable to read '$filename' - $!\n";
 527         return {};
 528     }
 529
 530     my $protocols = {};
 531
 532     while (my $line = <$fh>) {
 533         chomp ($line);
 534         next if $line =~m/^#/;
 535         next if ($line =~m/^\s*$/);
 536
 537         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 538             $protocols->{byid}->{$2}->{name} = $1;
 539             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 540         }
 541     }
 542
 543     close($fh);
 544
 545     $etc_protocols = $protocols;
 546
 547     return $etc_protocols;
 548 }
 549
 550 sub parse_address_list {
 551     my ($str) = @_;
 552
 553     my $nbaor = 0;
 554     foreach my $aor (split(/,/, $str)) {
 555         if (!Net::IP->new($aor)) {
 556             my $err = Net::IP::Error();
 557             die "invalid IP address: $err\n";
 558         }else{
 559             $nbaor++;
 560         }
 561     }
 562     return $nbaor;
 563 }
 564
 565 sub parse_port_name_number_or_range {
 566     my ($str) = @_;
 567
 568     my $services = PVE::Firewall::get_etc_services();
 569     my $nbports = 0;
 570     foreach my $item (split(/,/, $str)) {
 571         my $portlist = "";
 572         my $oldpon = undef;
 573         $nbports++;
 574         foreach my $pon (split(':', $item, 2)) {
 575             $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
 576             if ($pon =~ m/^\d+$/){
 577                 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
 578                 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
 579                 $oldpon = $pon;
 580             }else{
 581                 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
 582             }
 583         }
 584     }
 585
 586     return ($nbports);
 587 }
 588
 589 my $bridge_firewall_enabled = 0;
 590
 591 sub enable_bridge_firewall {
 592
 593     return if $bridge_firewall_enabled; # only once
 594
 595     system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
 596     system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
 597
 598     $bridge_firewall_enabled = 1;
 599 }
 600
 601 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 602
 603 sub iptables {
 604     my ($cmd) = @_;
 605
 606     run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
 607 }
 608
 609 sub iptables_restore_cmdlist {
 610     my ($cmdlist) = @_;
 611
 612     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 613 }
 614
 615 sub iptables_get_chains {
 616
 617     my $res = {};
 618
 619     # check what chains we want to track
 620     my $is_pvefw_chain = sub {
 621         my $name = shift;
 622
 623         return 1 if $name =~ m/^PVEFW-\S+$/;
 624
 625         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
 626         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
 627         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
 628
 629         return undef;
 630     };
 631
 632     my $table = '';
 633
 634     my $parser = sub {
 635         my $line = shift;
 636
 637         return if $line =~ m/^#/;
 638         return if $line =~ m/^\s*$/;
 639
 640         if ($line =~ m/^\*(\S+)$/) {
 641             $table = $1;
 642             return;
 643         }
 644
 645         return if $table ne 'filter';
 646
 647         if ($line =~ m/^:(\S+)\s/) {
 648             my $chain = $1;
 649             return if !&$is_pvefw_chain($chain);
 650             $res->{$chain} = "unknown";
 651         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
 652             my ($chain, $sig) = ($1, $2);
 653             return if !&$is_pvefw_chain($chain);
 654             $res->{$chain} = $sig;
 655         } else {
 656             # simply ignore the rest
 657             return;
 658         }
 659     };
 660
 661     run_command("/sbin/iptables-save", outfunc => $parser);
 662
 663     return $res;
 664 }
 665
 666 sub iptables_chain_exist {
 667     my ($chain) = @_;
 668
 669     eval{
 670         iptables("-n --list $chain");
 671     };
 672     return undef if $@;
 673
 674     return 1;
 675 }
 676
 677 sub iptables_rule_exist {
 678     my ($rule) = @_;
 679
 680     eval{
 681         iptables("-C $rule");
 682     };
 683     return undef if $@;
 684
 685     return 1;
 686 }
 687
 688 sub ruleset_generate_rule {
 689     my ($ruleset, $chain, $rule, $goto) = @_;
 690
 691     my $cmd = '';
 692
 693     $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
 694     $cmd .= " -s $rule->{source}" if $rule->{source};
 695     $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
 696     $cmd .= " -d $rule->{dest}" if $rule->{dest};
 697     $cmd .= " -p $rule->{proto}" if $rule->{proto};
 698
 699     if (($rule->{nbdport} && $rule->{nbdport} > 1) ||
 700         ($rule->{nbsport} && $rule->{nbsport} > 1)) {
 701         $cmd .= " --match multiport"
 702     }
 703
 704     if ($rule->{dport}) {
 705         if ($rule->{proto} && $rule->{proto} eq 'icmp') {
 706             # Note: we use dport to store --icmp-type
 707             die "unknown icmp-type\n" if !$icmp_type_names->{$rule->{dport}};
 708             $cmd .= " -m icmp --icmp-type $rule->{dport}";
 709         } else {
 710             if ($rule->{nbdport} && $rule->{nbdport} > 1) {
 711                 $cmd .= " --dports $rule->{dport}";
 712             } else {
 713                 $cmd .= " --dport $rule->{dport}";
 714             }
 715         }
 716     }
 717
 718     if ($rule->{sport}) {
 719         if ($rule->{nbsport} && $rule->{nbsport} > 1) {
 720             $cmd .= " --sports $rule->{sport}";
 721         } else {
 722             $cmd .= " --sport $rule->{sport}";
 723         }
 724     }
 725
 726     $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
 727
 728     if (my $action = $rule->{action}) {
 729         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
 730         $cmd .= $goto ? " -g $action" : " -j $action";
 731     };
 732
 733     ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
 734 }
 735
 736 sub ruleset_create_chain {
 737     my ($ruleset, $chain) = @_;
 738
 739     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
 740
 741     die "chain '$chain' already exists\n" if $ruleset->{$chain};
 742
 743     $ruleset->{$chain} = [];
 744 }
 745
 746 sub ruleset_chain_exist {
 747     my ($ruleset, $chain) = @_;
 748
 749     return $ruleset->{$chain} ? 1 : undef;
 750 }
 751
 752 sub ruleset_addrule {
 753    my ($ruleset, $chain, $rule) = @_;
 754
 755    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 756
 757    push @{$ruleset->{$chain}}, "-A $chain $rule";
 758 }
 759
 760 sub ruleset_insertrule {
 761    my ($ruleset, $chain, $rule) = @_;
 762
 763    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 764
 765    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
 766 }
 767
 768 sub generate_bridge_chains {
 769     my ($ruleset, $bridge) = @_;
 770
 771     if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
 772         ruleset_create_chain($ruleset, "PVEFW-FORWARD");
 773         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 774     }
 775
 776     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
 777         ruleset_create_chain($ruleset, "$bridge-FW");
 778         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
 779         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
 780         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");  # disable interbridge routing
 781         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
 782     }
 783
 784     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
 785         ruleset_create_chain($ruleset, "$bridge-OUT");
 786         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
 787     }
 788
 789     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
 790         ruleset_create_chain($ruleset, "$bridge-IN");
 791         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
 792         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
 793     }
 794 }
 795
 796 sub generate_tap_rules_direction {
 797     my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
 798
 799     my $rules = $vmfw_conf->{lc($direction)};
 800     my $options = $vmfw_conf->{options};
 801
 802     my $tapchain = "$iface-$direction";
 803
 804     ruleset_create_chain($ruleset, $tapchain);
 805
 806     ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
 807     ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 808
 809     if ($direction eq 'OUT' && defined($macaddr)) {
 810         ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
 811     }
 812
 813     if ($rules) {
 814         foreach my $rule (@$rules) {
 815             next if $rule->{iface} && $rule->{iface} ne $netid;
 816             # we go to $bridge-IN if accept in out rules
 817             if($rule->{action}  =~ m/^(GROUP-(\S+))$/){
 818                 $rule->{action} .= "-$direction";
 819                 # generate empty group rule if don't exist
 820                 if(!ruleset_chain_exist($ruleset, $rule->{action})){
 821                     generate_group_rules($ruleset, $group_rules, $2);
 822                 }
 823                 ruleset_generate_rule($ruleset, $tapchain, $rule);
 824                 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
 825                     if $direction eq 'OUT';
 826             } else {
 827                 $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
 828                 ruleset_generate_rule($ruleset, $tapchain, $rule);
 829             }
 830         }
 831     }
 832
 833     # implement policy
 834     my $policy;
 835
 836     if ($direction eq 'OUT') {
 837         $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
 838     } else {
 839         $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
 840     }
 841
 842     if ($policy eq 'ACCEPT') {
 843         if ($direction eq 'OUT') {
 844             ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
 845         } else {
 846             ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
 847         }
 848     } elsif ($policy eq 'DROP') {
 849         ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
 850         ruleset_addrule($ruleset, $tapchain, "-j DROP");
 851     } elsif ($policy eq 'REJECT') {
 852         ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
 853         ruleset_addrule($ruleset, $tapchain, "-j REJECT");
 854     } else {
 855         # should not happen
 856         die "internal error: unknown policy '$policy'";
 857     }
 858
 859     # plug the tap chain to bridge chain
 860     my $physdevdirection = $direction eq 'IN' ? "out" : "in";
 861     my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
 862     ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
 863
 864     if ($direction eq 'OUT'){
 865         # add tap->host rules
 866         my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
 867         ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
 868     }
 869 }
 870
 871 sub enablehostfw {
 872     my ($ruleset, $rules, $group_rules) = @_;
 873
 874     # fixme: allow security groups
 875
 876     # host inbound firewall
 877     my $chain = "PVEFW-HOST-IN";
 878     ruleset_create_chain($ruleset, $chain);
 879
 880     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
 881     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 882     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
 883     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
 884     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
 885     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
 886
 887     if ($rules->{in}) {
 888         foreach my $rule (@{$rules->{in}}) {
 889             # we use RETURN because we need to check also tap rules
 890             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 891             ruleset_generate_rule($ruleset, $chain, $rule);
 892         }
 893     }
 894
 895     ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
 896     ruleset_addrule($ruleset, $chain, "-j DROP");
 897
 898     # host outbound firewall
 899     $chain = "PVEFW-HOST-OUT";
 900     ruleset_create_chain($ruleset, $chain);
 901
 902     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
 903     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 904     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
 905     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
 906     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
 907     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 908
 909     if ($rules->{out}) {
 910         foreach my $rule (@{$rules->{out}}) {
 911             # we use RETURN because we need to check also tap rules
 912             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 913             ruleset_generate_rule($ruleset, $chain, $rule);
 914         }
 915     }
 916
 917     ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
 918     ruleset_addrule($ruleset, $chain, "-j DROP");
 919
 920     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
 921     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
 922 }
 923
 924 sub generate_group_rules {
 925     my ($ruleset, $group_rules, $group) = @_;
 926
 927     my $rules = $group_rules->{$group};
 928
 929     die "no such security group '$group'\n" if !$rules;
 930
 931     my $chain = "GROUP-${group}-IN";
 932
 933     ruleset_create_chain($ruleset, $chain);
 934
 935     if ($rules->{in}) {
 936         foreach my $rule (@{$rules->{in}}) {
 937             ruleset_generate_rule($ruleset, $chain, $rule);
 938         }
 939     }
 940
 941     $chain = "GROUP-${group}-OUT";
 942
 943     ruleset_create_chain($ruleset, $chain);
 944     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
 945
 946     if ($rules->{out}) {
 947         foreach my $rule (@{$rules->{out}}) {
 948             # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
 949             # check also other tap rules (and group rules can be set on any bridge,
 950             # so we can't go to VMBRXX-IN)
 951             $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
 952             ruleset_generate_rule($ruleset, $chain, $rule);
 953         }
 954     }
 955 }
 956
 957 my $MAX_NETS = 32;
 958 my $valid_netdev_names = {};
 959 for (my $i = 0; $i < $MAX_NETS; $i++)  {
 960     $valid_netdev_names->{"net$i"} = 1;
 961 }
 962
 963 sub parse_fw_rule {
 964     my ($line, $need_iface, $allow_groups) = @_;
 965
 966     my $macros = get_firewall_macros();
 967     my $protocols = get_etc_protocols();
 968
 969     my ($action, $iface, $source, $dest, $proto, $dport, $sport);
 970
 971     $line =~ s/#.*$//;
 972
 973     my @data = split(/\s+/, $line);
 974     my $expected_elements = $need_iface ? 7 : 6;
 975
 976     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
 977
 978     if ($need_iface) {
 979         ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
 980     } else {
 981         ($action, $source, $dest, $proto, $dport, $sport) =  @data;
 982     }
 983
 984     die "incomplete rule\n" if !$action;
 985
 986     my $macro;
 987     my $macro_name;
 988
 989     if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
 990         # OK
 991     } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
 992         # OK
 993     } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
 994         ($macro_name, $action) = ($1, $2);
 995         my $lc_macro_name = lc($macro_name);
 996         my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
 997         $macro_name = $preferred_name if $preferred_name;
 998         $macro = $macros->{$lc_macro_name};
 999         die "unknown macro '$macro_name'\n" if !$macro;
1000     } else {
1001         die "unknown action '$action'\n";
1002     }
1003
1004     if ($need_iface) {
1005         $iface = undef if $iface && $iface eq '-';
1006         die "unknown interface '$iface'\n"
1007             if defined($iface) && !$valid_netdev_names->{$iface};
1008     }
1009
1010     $proto = undef if $proto && $proto eq '-';
1011     die "unknown protokol '$proto'\n" if $proto &&
1012         !(defined($protocols->{byname}->{$proto}) ||
1013           defined($protocols->{byid}->{$proto}));
1014
1015     $source = undef if $source && $source eq '-';
1016     $dest = undef if $dest && $dest eq '-';
1017
1018     $dport = undef if $dport && $dport eq '-';
1019     $sport = undef if $sport && $sport eq '-';
1020
1021     my $nbsource = undef;
1022     my $nbdest = undef;
1023
1024     $nbsource = parse_address_list($source) if $source;
1025     $nbdest = parse_address_list($dest) if $dest;
1026
1027     my $rules = [];
1028
1029     my $param = {
1030         action => $action,
1031         iface => $iface,
1032         source => $source,
1033         dest => $dest,
1034         nbsource => $nbsource,
1035         nbdest => $nbdest,
1036         proto => $proto,
1037         dport => $dport,
1038         sport => $sport,
1039     };
1040
1041     if ($macro) {
1042         foreach my $templ (@$macro) {
1043             my $rule = {};
1044             foreach my $k (keys %$templ) {
1045                 my $v = $templ->{$k};
1046                 if ($v eq 'PARAM') {
1047                     $v = $param->{$k};
1048                 } elsif ($v eq 'DEST') {
1049                     $v = $param->{dest};
1050                 } elsif ($v eq 'SOURCE') {
1051                     $v = $param->{source};
1052                 }
1053
1054                 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1055                 $rule->{$k} = $v;
1056             }
1057             push @$rules, $rule;
1058         }
1059     } else {
1060         push @$rules, $param;
1061     }
1062
1063     foreach my $rule (@$rules) {
1064         $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
1065             if defined($rule->{dport});
1066         $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
1067             if defined($rule->{sport});
1068     }
1069
1070     return $rules;
1071 }
1072
1073 sub parse_fw_option {
1074     my ($line) = @_;
1075
1076     my ($opt, $value);
1077
1078     if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
1079         $opt = 'enable';
1080         $value = int($1);
1081     } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1082         $opt = lc($1);
1083         $value = uc($3);
1084      } else {
1085         chomp $line;
1086         die "can't parse option '$line'\n"
1087     }
1088
1089     return ($opt, $value);
1090 }
1091
1092 sub parse_vm_fw_rules {
1093     my ($filename, $fh) = @_;
1094
1095     my $res = { in => [], out => [], options => {}};
1096
1097     my $section;
1098
1099     while (defined(my $line = <$fh>)) {
1100         next if $line =~ m/^#/;
1101         next if $line =~ m/^\s*$/;
1102
1103         my $linenr = $fh->input_line_number();
1104         my $prefix = "$filename (line $linenr)";
1105
1106         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1107             $section = lc($1);
1108             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1109             next;
1110         }
1111         if (!$section) {
1112             warn "$prefix: skip line - no section";
1113             next;
1114         }
1115
1116         next if !$res->{$section}; # skip undefined section
1117
1118         if ($section eq 'options') {
1119             eval {
1120                 my ($opt, $value) = parse_fw_option($line);
1121                 $res->{options}->{$opt} = $value;
1122             };
1123             warn "$prefix: $@" if $@;
1124             next;
1125         }
1126
1127         my $rules;
1128         eval { $rules = parse_fw_rule($line, 1, 1); };
1129         if (my $err = $@) {
1130             warn "$prefix: $err";
1131             next;
1132         }
1133
1134         push @{$res->{$section}}, @$rules;
1135     }
1136
1137     return $res;
1138 }
1139
1140 sub parse_host_fw_rules {
1141     my ($filename, $fh) = @_;
1142
1143     my $res = { in => [], out => [] };
1144
1145     my $section;
1146
1147     while (defined(my $line = <$fh>)) {
1148         next if $line =~ m/^#/;
1149         next if $line =~ m/^\s*$/;
1150
1151         my $linenr = $fh->input_line_number();
1152         my $prefix = "$filename (line $linenr)";
1153
1154         if ($line =~ m/^\[(in|out)\]\s*$/i) {
1155             $section = lc($1);
1156             next;
1157         }
1158         if (!$section) {
1159             warn "$prefix: skip line - no section";
1160             next;
1161         }
1162
1163         my $rules;
1164         eval { $rules = parse_fw_rule($line, 1, 1); };
1165         if (my $err = $@) {
1166             warn "$prefix: $err";
1167             next;
1168         }
1169
1170         push @{$res->{$section}}, @$rules;
1171     }
1172
1173     return $res;
1174 }
1175
1176 sub parse_group_fw_rules {
1177     my ($filename, $fh) = @_;
1178
1179     my $section;
1180     my $group;
1181
1182     my $res = { in => [], out => [] };
1183
1184     while (defined(my $line = <$fh>)) {
1185         next if $line =~ m/^#/;
1186         next if $line =~ m/^\s*$/;
1187
1188         my $linenr = $fh->input_line_number();
1189         my $prefix = "$filename (line $linenr)";
1190
1191         if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1192             $section = lc($1);
1193             $group = lc($2);
1194             next;
1195         }
1196         if (!$section || !$group) {
1197             warn "$prefix: skip line - no section";
1198             next;
1199         }
1200
1201         my $rules;
1202         eval { $rules = parse_fw_rule($line, 0, 0); };
1203         if (my $err = $@) {
1204             warn "$prefix: $err";
1205             next;
1206         }
1207
1208         push @{$res->{$group}->{$section}}, @$rules;
1209     }
1210
1211     return $res;
1212 }
1213
1214 sub run_locked {
1215     my ($code, @param) = @_;
1216
1217     my $timeout = 10;
1218
1219     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1220
1221     die $@ if $@;
1222
1223     return $res;
1224 }
1225
1226 sub read_local_vm_config {
1227
1228     my $openvz = {};
1229
1230     my $qemu = {};
1231
1232     my $list = PVE::QemuServer::config_list();
1233
1234     foreach my $vmid (keys %$list) {
1235         my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1236         if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1237             $qemu->{$vmid} = $conf;
1238         }
1239     }
1240
1241     my $vmdata = { openvz => $openvz, qemu => $qemu };
1242
1243     return $vmdata;
1244 };
1245
1246 sub read_vm_firewall_rules {
1247     my ($vmdata) = @_;
1248     my $rules = {};
1249     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1250         my $filename = "/etc/pve/firewall/$vmid.fw";
1251         my $fh = IO::File->new($filename, O_RDONLY);
1252         next if !$fh;
1253
1254         $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
1255     }
1256
1257     return $rules;
1258 }
1259
1260 sub generate_std_chains {
1261     my ($ruleset) = @_;
1262
1263     foreach my $chain (keys %$pve_std_chains) {
1264         ruleset_create_chain($ruleset, $chain);
1265         foreach my $rule (@{$pve_std_chains->{$chain}}) {
1266             if (ref($rule)) {
1267                 ruleset_generate_rule($ruleset, $chain, $rule);
1268             } else {
1269                 ruleset_addrule($ruleset, $chain, $rule);
1270             }
1271         }
1272     }
1273 }
1274
1275 sub compile {
1276     my $vmdata = read_local_vm_config();
1277     my $rules = read_vm_firewall_rules($vmdata);
1278
1279     my $group_rules = {};
1280     my $filename = "/etc/pve/firewall/groups.fw";
1281     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1282         $group_rules = parse_group_fw_rules($filename, $fh);
1283     }
1284
1285     #print Dumper($rules);
1286
1287     my $ruleset = {};
1288
1289     ruleset_create_chain($ruleset, "PVEFW-INPUT");
1290     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
1291     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
1292
1293     generate_std_chains($ruleset);
1294
1295     my $enable_hostfw = 0;
1296     $filename = "/etc/pve/local/host.fw";
1297     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1298         my $host_rules = parse_host_fw_rules($filename, $fh);
1299
1300         $enable_hostfw = 1;
1301
1302         enablehostfw($ruleset, $host_rules, $group_rules);
1303     }
1304
1305     # generate firewall rules for QEMU VMs
1306     foreach my $vmid (keys %{$vmdata->{qemu}}) {
1307         my $conf = $vmdata->{qemu}->{$vmid};
1308         my $vmfw_conf = $rules->{$vmid};
1309         next if !$vmfw_conf;
1310         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1311
1312         foreach my $netid (keys %$conf) {
1313             next if $netid !~ m/^net(\d+)$/;
1314             my $net = PVE::QemuServer::parse_net($conf->{$netid});
1315             next if !$net;
1316             my $iface = "tap${vmid}i$1";
1317
1318             my $bridge = $net->{bridge};
1319             next if !$bridge; # fixme: ?
1320
1321             $bridge .= "v$net->{tag}" if $net->{tag};
1322
1323
1324             generate_bridge_chains($ruleset, $bridge);
1325
1326             my $macaddr = $net->{macaddr};
1327             generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1328             generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1329         }
1330     }
1331
1332     if ($enable_hostfw) {
1333         # allow traffic from lo (ourself)
1334         ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1335     }
1336
1337     return $ruleset;
1338 }
1339
1340 sub get_ruleset_status {
1341     my ($ruleset, $verbose) = @_;
1342
1343     my $active_chains = iptables_get_chains();
1344
1345     my $statushash = {};
1346
1347     foreach my $chain (sort keys %$ruleset) {
1348         my $digest = Digest::SHA->new('sha1');
1349         foreach my $cmd (@{$ruleset->{$chain}}) {
1350              $digest->add("$cmd\n");
1351         }
1352         my $sig = $digest->b64digest;
1353         $statushash->{$chain}->{sig} = $sig;
1354
1355         my $oldsig = $active_chains->{$chain};
1356         if (!defined($oldsig)) {
1357             $statushash->{$chain}->{action} = 'create';
1358         } else {
1359             if ($oldsig eq $sig) {
1360                 $statushash->{$chain}->{action} = 'exists';
1361             } else {
1362                 $statushash->{$chain}->{action} = 'update';
1363             }
1364         }
1365         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1366         foreach my $cmd (@{$ruleset->{$chain}}) {
1367             print "\t$cmd\n" if $verbose;
1368         }
1369     }
1370
1371     foreach my $chain (sort keys %$active_chains) {
1372         if (!defined($ruleset->{$chain})) {
1373             my $sig = $active_chains->{$chain};
1374             $statushash->{$chain}->{action} = 'delete';
1375             $statushash->{$chain}->{sig} = $sig;
1376             print "delete $chain ($sig)\n" if $verbose;
1377         }
1378     }
1379
1380     return $statushash;
1381 }
1382
1383 sub print_ruleset {
1384     my ($ruleset) = @_;
1385
1386     get_ruleset_status($ruleset, 1);
1387 }
1388
1389 sub print_sig_rule {
1390     my ($chain, $sig) = @_;
1391
1392     # We just use this to store a SHA1 checksum used to detect changes
1393     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1394 }
1395
1396 sub apply_ruleset {
1397     my ($ruleset, $verbose) = @_;
1398
1399     enable_bridge_firewall();
1400
1401     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1402
1403     my $statushash = get_ruleset_status($ruleset, $verbose);
1404
1405     # create missing chains first
1406     foreach my $chain (sort keys %$ruleset) {
1407         my $stat = $statushash->{$chain};
1408         die "internal error" if !$stat;
1409         next if $stat->{action} ne 'create';
1410
1411         $cmdlist .= ":$chain - [0:0]\n";
1412     }
1413
1414     my $rule = "INPUT -j PVEFW-INPUT";
1415     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1416         $cmdlist .= "-A $rule\n";
1417     }
1418     $rule = "OUTPUT -j PVEFW-OUTPUT";
1419     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1420         $cmdlist .= "-A $rule\n";
1421     }
1422
1423     $rule = "FORWARD -j PVEFW-FORWARD";
1424     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1425         $cmdlist .= "-A $rule\n";
1426     }
1427
1428     foreach my $chain (sort keys %$ruleset) {
1429         my $stat = $statushash->{$chain};
1430         die "internal error" if !$stat;
1431
1432         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1433             $cmdlist .= "-F $chain\n";
1434             foreach my $cmd (@{$ruleset->{$chain}}) {
1435                 $cmdlist .= "$cmd\n";
1436             }
1437             $cmdlist .= print_sig_rule($chain, $stat->{sig});
1438         } elsif ($stat->{action} eq 'delete') {
1439             die "internal error"; # this should not happen
1440         } elsif ($stat->{action} eq 'exists') {
1441             # do nothing
1442         } else {
1443             die "internal error - unknown status '$stat->{action}'";
1444         }
1445     }
1446
1447     foreach my $chain (keys %$statushash) {
1448         next if $statushash->{$chain}->{action} ne 'delete';
1449         $cmdlist .= "-F $chain\n";
1450     }
1451     foreach my $chain (keys %$statushash) {
1452         next if $statushash->{$chain}->{action} ne 'delete';
1453         next if $chain eq 'PVEFW-INPUT';
1454         next if $chain eq 'PVEFW-OUTPUT';
1455         next if $chain eq 'PVEFW-FORWARD';
1456         $cmdlist .= "-X $chain\n";
1457     }
1458
1459     $cmdlist .= "COMMIT\n";
1460
1461     print $cmdlist if $verbose;
1462
1463     iptables_restore_cmdlist($cmdlist);
1464
1465     # test: re-read status and check if everything is up to date
1466     $statushash = get_ruleset_status($ruleset);
1467
1468     my $errors;
1469     foreach my $chain (sort keys %$ruleset) {
1470         my $stat = $statushash->{$chain};
1471         if ($stat->{action} ne 'exists') {
1472             warn "unable to update chain '$chain'\n";
1473             $errors = 1;
1474         }
1475     }
1476
1477     die "unable to apply firewall changes\n" if $errors;
1478 }
1479
1480 1;