src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  41 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  42 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  43
  44 my $max_alias_name_length = 64;
  45 my $max_ipset_name_length = 64;
  46 my $max_group_name_length = 20;
  47
  48 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  49 sub pve_verify_ip_or_cidr {
  50     my ($cidr, $noerr) = @_;
  51
  52     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  53         return $cidr if Net::IP->new($cidr);
  54         return undef if $noerr;
  55         die Net::IP::Error() . "\n";
  56     }
  57     return undef if $noerr;
  58     die "value does not look like a valid IP address or CIDR network\n";
  59 }
  60
  61 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  62 sub pve_verify_ip_or_cidr_or_alias {
  63     my ($cidr, $noerr) = @_;
  64
  65     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  66
  67     return pve_verify_ip_or_cidr($cidr, $noerr);
  68 }
  69
  70 PVE::JSONSchema::register_standard_option('ipset-name', {
  71     description => "IP set name.",
  72     type => 'string',
  73     pattern => $ipset_name_pattern,
  74     minLength => 2,
  75     maxLength => $max_ipset_name_length,
  76 });
  77
  78 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  79     description => "Alias name.",
  80     type => 'string',
  81     pattern => $ip_alias_pattern,
  82     minLength => 2,
  83     maxLength => $max_alias_name_length,
  84 });
  85
  86 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  87     description => "Log level.",
  88     type => 'string',
  89     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  90     optional => 1,
  91 });
  92
  93 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  94     description => "Security Group name.",
  95     type => 'string',
  96     pattern => $security_group_name_pattern,
  97     minLength => 2,
  98     maxLength => $max_group_name_length,
  99 });
 100
 101 my $feature_ipset_nomatch = 0;
 102 eval  {
 103     my (undef, undef, $release) = POSIX::uname();
 104     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 105         my ($major, $minor) = ($1, $2);
 106         $feature_ipset_nomatch = 1 if ($major > 3) ||
 107             ($major == 3 && $minor >= 7);
 108     }
 109
 110 };
 111
 112 use Data::Dumper;
 113
 114 my $nodename = PVE::INotify::nodename();
 115
 116 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 117
 118 my $default_log_level = 'nolog'; # avoid logs by default
 119
 120 my $log_level_hash = {
 121     debug => 7,
 122     info => 6,
 123     notice => 5,
 124     warning => 4,
 125     err => 3,
 126     crit => 2,
 127     alert => 1,
 128     emerg => 0,
 129 };
 130
 131 # imported/converted from: /usr/share/shorewall/macro.*
 132 my $pve_fw_macros = {
 133     'Amanda' => [
 134         "Amanda Backup",
 135         { action => 'PARAM', proto => 'udp', dport => '10080' },
 136         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 137     ],
 138     'Auth' => [
 139         "Auth (identd) traffic",
 140         { action => 'PARAM', proto => 'tcp', dport => '113' },
 141     ],
 142     'BGP' => [
 143         "Border Gateway Protocol traffic",
 144         { action => 'PARAM', proto => 'tcp', dport => '179' },
 145     ],
 146     'BitTorrent' => [
 147         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 148         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 149         { action => 'PARAM', proto => 'udp', dport => '6881' },
 150     ],
 151     'BitTorrent32' => [
 152         "BitTorrent traffic for BitTorrent 3.2 and later",
 153         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 154         { action => 'PARAM', proto => 'udp', dport => '6881' },
 155     ],
 156     'CVS' => [
 157         "Concurrent Versions System pserver traffic",
 158         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 159     ],
 160     'Citrix' => [
 161         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 162         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 163         { action => 'PARAM', proto => 'udp', dport => '1604' },
 164         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 165     ],
 166     'DAAP' => [
 167         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 168         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 169         { action => 'PARAM', proto => 'udp', dport => '3689' },
 170     ],
 171     'DCC' => [
 172         "Distributed Checksum Clearinghouse spam filtering mechanism",
 173         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 174     ],
 175     'DHCPfwd' => [
 176         "Forwarded DHCP traffic",
 177         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 178     ],
 179     'DNS' => [
 180         "Domain Name System traffic (upd and tcp)",
 181         { action => 'PARAM', proto => 'udp', dport => '53' },
 182         { action => 'PARAM', proto => 'tcp', dport => '53' },
 183     ],
 184     'Distcc' => [
 185         "Distributed Compiler service",
 186         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 187     ],
 188     'FTP' => [
 189         "File Transfer Protocol",
 190         { action => 'PARAM', proto => 'tcp', dport => '21' },
 191     ],
 192     'Finger' => [
 193         "Finger protocol (RFC 742)",
 194         { action => 'PARAM', proto => 'tcp', dport => '79' },
 195     ],
 196     'GNUnet' => [
 197         "GNUnet secure peer-to-peer networking traffic",
 198         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 199         { action => 'PARAM', proto => 'udp', dport => '2086' },
 200         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 201         { action => 'PARAM', proto => 'udp', dport => '1080' },
 202     ],
 203     'GRE' => [
 204         "Generic Routing Encapsulation tunneling protocol",
 205         { action => 'PARAM', proto => '47' },
 206     ],
 207     'Git' => [
 208         "Git distributed revision control traffic",
 209         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 210     ],
 211     'HKP' => [
 212         "OpenPGP HTTP keyserver protocol traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 214     ],
 215     'HTTP' => [
 216         "Hypertext Transfer Protocol (WWW)",
 217         { action => 'PARAM', proto => 'tcp', dport => '80' },
 218     ],
 219     'HTTPS' => [
 220         "Hypertext Transfer Protocol (WWW) over SSL",
 221         { action => 'PARAM', proto => 'tcp', dport => '443' },
 222     ],
 223     'ICPV2' => [
 224         "Internet Cache Protocol V2 (Squid) traffic",
 225         { action => 'PARAM', proto => 'udp', dport => '3130' },
 226     ],
 227     'ICQ' => [
 228         "AOL Instant Messenger traffic",
 229         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 230     ],
 231     'IMAP' => [
 232         "Internet Message Access Protocol",
 233         { action => 'PARAM', proto => 'tcp', dport => '143' },
 234     ],
 235     'IMAPS' => [
 236         "Internet Message Access Protocol over SSL",
 237         { action => 'PARAM', proto => 'tcp', dport => '993' },
 238     ],
 239     'IPIP' => [
 240         "IPIP capsulation traffic",
 241         { action => 'PARAM', proto => '94' },
 242     ],
 243     'IPsec' => [
 244         "IPsec traffic",
 245         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 246         { action => 'PARAM', proto => '50' },
 247     ],
 248     'IPsecah' => [
 249         "IPsec authentication (AH) traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 251         { action => 'PARAM', proto => '51' },
 252     ],
 253     'IPsecnat' => [
 254         "IPsec traffic and Nat-Traversal",
 255         { action => 'PARAM', proto => 'udp', dport => '500' },
 256         { action => 'PARAM', proto => 'udp', dport => '4500' },
 257         { action => 'PARAM', proto => '50' },
 258     ],
 259     'IRC' => [
 260         "Internet Relay Chat traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 262     ],
 263     'Jetdirect' => [
 264         "HP Jetdirect printing",
 265         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 266     ],
 267     'L2TP' => [
 268         "Layer 2 Tunneling Protocol traffic",
 269         { action => 'PARAM', proto => 'udp', dport => '1701' },
 270     ],
 271     'LDAP' => [
 272         "Lightweight Directory Access Protocol traffic",
 273         { action => 'PARAM', proto => 'tcp', dport => '389' },
 274     ],
 275     'LDAPS' => [
 276         "Secure Lightweight Directory Access Protocol traffic",
 277         { action => 'PARAM', proto => 'tcp', dport => '636' },
 278     ],
 279     'MSNP' => [
 280         "Microsoft Notification Protocol",
 281         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 282     ],
 283     'MSSQL' => [
 284         "Microsoft SQL Server",
 285         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 286     ],
 287     'Mail' => [
 288         "Mail traffic (SMTP, SMTPS, Submission)",
 289         { action => 'PARAM', proto => 'tcp', dport => '25' },
 290         { action => 'PARAM', proto => 'tcp', dport => '465' },
 291         { action => 'PARAM', proto => 'tcp', dport => '587' },
 292     ],
 293     'Munin' => [
 294         "Munin networked resource monitoring traffic",
 295         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 296     ],
 297     'MySQL' => [
 298         "MySQL server",
 299         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 300     ],
 301     'NNTP' => [
 302         "NNTP traffic (Usenet).",
 303         { action => 'PARAM', proto => 'tcp', dport => '119' },
 304     ],
 305     'NNTPS' => [
 306         "Encrypted NNTP traffic (Usenet)",
 307         { action => 'PARAM', proto => 'tcp', dport => '563' },
 308     ],
 309     'NTP' => [
 310         "Network Time Protocol (ntpd)",
 311         { action => 'PARAM', proto => 'udp', dport => '123' },
 312     ],
 313     'OSPF' => [
 314         "OSPF multicast traffic",
 315         { action => 'PARAM', proto => '89' },
 316     ],
 317     'OpenVPN' => [
 318         "OpenVPN traffic",
 319         { action => 'PARAM', proto => 'udp', dport => '1194' },
 320     ],
 321     'PCA' => [
 322         "Symantec PCAnywere (tm)",
 323         { action => 'PARAM', proto => 'udp', dport => '5632' },
 324         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 325     ],
 326     'POP3' => [
 327         "POP3 traffic",
 328         { action => 'PARAM', proto => 'tcp', dport => '110' },
 329     ],
 330     'POP3S' => [
 331         "Encrypted POP3 traffic",
 332         { action => 'PARAM', proto => 'tcp', dport => '995' },
 333     ],
 334     'PPtP' => [
 335         "Point-to-Point Tunneling Protocol",
 336         { action => 'PARAM', proto => '47' },
 337         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 338     ],
 339     'Ping' => [
 340         "ICMP echo request",
 341         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 342     ],
 343     'PostgreSQL' => [
 344         "PostgreSQL server",
 345         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 346     ],
 347     'Printer' => [
 348         "Line Printer protocol printing",
 349         { action => 'PARAM', proto => 'tcp', dport => '515' },
 350     ],
 351     'RDP' => [
 352         "Microsoft Remote Desktop Protocol traffic",
 353         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 354     ],
 355     'RIP' => [
 356         "Routing Information Protocol (bidirectional)",
 357         { action => 'PARAM', proto => 'udp', dport => '520' },
 358     ],
 359     'RNDC' => [
 360         "BIND remote management protocol",
 361         { action => 'PARAM', proto => 'tcp', dport => '953' },
 362     ],
 363     'Razor' => [
 364         "Razor Antispam System",
 365         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 366     ],
 367     'Rdate' => [
 368         "Remote time retrieval (rdate)",
 369         { action => 'PARAM', proto => 'tcp', dport => '37' },
 370     ],
 371     'Rsync' => [
 372         "Rsync server",
 373         { action => 'PARAM', proto => 'tcp', dport => '873' },
 374     ],
 375     'SANE' => [
 376         "SANE network scanning",
 377         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 378     ],
 379     'SMB' => [
 380         "Microsoft SMB traffic",
 381         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 382         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 383         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 384         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 385     ],
 386     'SMBswat' => [
 387         "Samba Web Administration Tool",
 388         { action => 'PARAM', proto => 'tcp', dport => '901' },
 389     ],
 390     'SMTP' => [
 391         "Simple Mail Transfer Protocol",
 392         { action => 'PARAM', proto => 'tcp', dport => '25' },
 393     ],
 394     'SMTPS' => [
 395         "Encrypted Simple Mail Transfer Protocol",
 396         { action => 'PARAM', proto => 'tcp', dport => '465' },
 397     ],
 398     'SNMP' => [
 399         "Simple Network Management Protocol",
 400         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 401         { action => 'PARAM', proto => 'tcp', dport => '161' },
 402     ],
 403     'SPAMD' => [
 404         "Spam Assassin SPAMD traffic",
 405         { action => 'PARAM', proto => 'tcp', dport => '783' },
 406     ],
 407     'SSH' => [
 408         "Secure shell traffic",
 409         { action => 'PARAM', proto => 'tcp', dport => '22' },
 410     ],
 411     'SVN' => [
 412         "Subversion server (svnserve)",
 413         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 414     ],
 415     'SixXS' => [
 416         "SixXS IPv6 Deployment and Tunnel Broker",
 417         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 418         { action => 'PARAM', proto => 'udp', dport => '3740' },
 419         { action => 'PARAM', proto => '41' },
 420         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 421     ],
 422     'Squid' => [
 423         "Squid web proxy traffic",
 424         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 425     ],
 426     'Submission' => [
 427         "Mail message submission traffic",
 428         { action => 'PARAM', proto => 'tcp', dport => '587' },
 429     ],
 430     'Syslog' => [
 431         "Syslog protocol (RFC 5424) traffic",
 432         { action => 'PARAM', proto => 'udp', dport => '514' },
 433         { action => 'PARAM', proto => 'tcp', dport => '514' },
 434     ],
 435     'TFTP' => [
 436         "Trivial File Transfer Protocol traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '69' },
 438     ],
 439     'Telnet' => [
 440         "Telnet traffic",
 441         { action => 'PARAM', proto => 'tcp', dport => '23' },
 442     ],
 443     'Telnets' => [
 444         "Telnet over SSL",
 445         { action => 'PARAM', proto => 'tcp', dport => '992' },
 446     ],
 447     'Time' => [
 448         "RFC 868 Time protocol",
 449         { action => 'PARAM', proto => 'tcp', dport => '37' },
 450     ],
 451     'Trcrt' => [
 452         "Traceroute (for up to 30 hops) traffic",
 453         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 454         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 455     ],
 456     'VNC' => [
 457         "VNC traffic for VNC display's 0 - 99",
 458         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 459     ],
 460     'VNCL' => [
 461         "VNC traffic from Vncservers to Vncviewers in listen mode",
 462         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 463     ],
 464     'Web' => [
 465         "WWW traffic (HTTP and HTTPS)",
 466         { action => 'PARAM', proto => 'tcp', dport => '80' },
 467         { action => 'PARAM', proto => 'tcp', dport => '443' },
 468     ],
 469     'Webcache' => [
 470         "Web Cache/Proxy traffic (port 8080)",
 471         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 472     ],
 473     'Webmin' => [
 474         "Webmin traffic",
 475         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 476     ],
 477     'Whois' => [
 478         "Whois (nicname, RFC 3912) traffic",
 479         { action => 'PARAM', proto => 'tcp', dport => '43' },
 480     ],
 481 };
 482
 483 my $pve_fw_parsed_macros;
 484 my $pve_fw_macro_descr;
 485 my $pve_fw_preferred_macro_names = {};
 486
 487 my $pve_std_chains = {};
 488 $pve_std_chains->{4} = {
 489     'PVEFW-SET-ACCEPT-MARK' => [
 490         "-j MARK --set-mark 1",
 491     ],
 492     'PVEFW-DropBroadcast' => [
 493         # same as shorewall 'Broadcast'
 494         # simply DROP BROADCAST/MULTICAST/ANYCAST
 495         # we can use this to reduce logging
 496         { action => 'DROP', dsttype => 'BROADCAST' },
 497         { action => 'DROP', dsttype => 'MULTICAST' },
 498         { action => 'DROP', dsttype => 'ANYCAST' },
 499         { action => 'DROP', dest => '224.0.0.0/4' },
 500     ],
 501     'PVEFW-reject' => [
 502         # same as shorewall 'reject'
 503         { action => 'DROP', dsttype => 'BROADCAST' },
 504         { action => 'DROP', source => '224.0.0.0/4' },
 505         { action => 'DROP', proto => 'icmp' },
 506         "-p tcp -j REJECT --reject-with tcp-reset",
 507         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 508         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 509         "-j REJECT --reject-with icmp-host-prohibited",
 510     ],
 511     'PVEFW-Drop' => [
 512         # same as shorewall 'Drop', which is equal to DROP,
 513         # but REJECT/DROP some packages to reduce logging,
 514         # and ACCEPT critical ICMP types
 515         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 516         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 517         { action => 'PVEFW-DropBroadcast' },
 518         # ACCEPT critical ICMP types
 519         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 520         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 521         # Drop packets with INVALID state
 522         "-m conntrack --ctstate INVALID -j DROP",
 523         # Drop Microsoft SMB noise
 524         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 525         { action => 'DROP', proto => 'udp', dport => '137:139'},
 526         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 527         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 528         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 529         # Drop new/NotSyn traffic so that it doesn't get logged
 530         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 531         # Drop DNS replies
 532         { action => 'DROP', proto => 'udp', sport => 53 },
 533     ],
 534     'PVEFW-Reject' => [
 535         # same as shorewall 'Reject', which is equal to Reject,
 536         # but REJECT/DROP some packages to reduce logging,
 537         # and ACCEPT critical ICMP types
 538         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 539         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 540         { action => 'PVEFW-DropBroadcast' },
 541         # ACCEPT critical ICMP types
 542         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 543         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 544         # Drop packets with INVALID state
 545         "-m conntrack --ctstate INVALID -j DROP",
 546         # Drop Microsoft SMB noise
 547         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 548         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 549         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 550         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 551         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 552         # Drop new/NotSyn traffic so that it doesn't get logged
 553         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 554         # Drop DNS replies
 555         { action => 'DROP', proto => 'udp', sport => 53 },
 556     ],
 557     'PVEFW-tcpflags' => [
 558         # same as shorewall tcpflags action.
 559         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 560         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 561         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 562         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 563         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 564         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 565     ],
 566     'PVEFW-smurfs' => [
 567         # same as shorewall smurfs action
 568         # Filter packets for smurfs (packets with a broadcast address as the source).
 569         "-s 0.0.0.0/32 -j RETURN",
 570         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 571         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 572     ],
 573 };
 574
 575 # iptables -p icmp -h
 576 my $icmp_type_names = {
 577     any => 1,
 578     'echo-reply' => 1,
 579     'destination-unreachable' => 1,
 580     'network-unreachable' => 1,
 581     'host-unreachable' => 1,
 582     'protocol-unreachable' => 1,
 583     'port-unreachable' => 1,
 584     'fragmentation-needed' => 1,
 585     'source-route-failed' => 1,
 586     'network-unknown' => 1,
 587     'host-unknown' => 1,
 588     'network-prohibited' => 1,
 589     'host-prohibited' => 1,
 590     'TOS-network-unreachable' => 1,
 591     'TOS-host-unreachable' => 1,
 592     'communication-prohibited' => 1,
 593     'host-precedence-violation' => 1,
 594     'precedence-cutoff' => 1,
 595     'source-quench' => 1,
 596     'redirect' => 1,
 597     'network-redirect' => 1,
 598     'host-redirect' => 1,
 599     'TOS-network-redirect' => 1,
 600     'TOS-host-redirect' => 1,
 601     'echo-request' => 1,
 602     'router-advertisement' => 1,
 603     'router-solicitation' => 1,
 604     'time-exceeded' => 1,
 605     'ttl-zero-during-transit' => 1,
 606     'ttl-zero-during-reassembly' => 1,
 607     'parameter-problem' => 1,
 608     'ip-header-bad' => 1,
 609     'required-option-missing' => 1,
 610     'timestamp-request' => 1,
 611     'timestamp-reply' => 1,
 612     'address-mask-request' => 1,
 613     'address-mask-reply' => 1,
 614 };
 615
 616 # ip6tables -p icmpv6 -h
 617
 618 my $icmpv6_type_names = {
 619     'any' => 1,
 620     'destination-unreachable' => 1,
 621     'no-route' => 1,
 622     'communication-prohibited' => 1,
 623     'address-unreachable' => 1,
 624     'port-unreachable' => 1,
 625     'packet-too-big' => 1,
 626     'time-exceeded' => 1,
 627     'ttl-zero-during-transit' => 1,
 628     'ttl-zero-during-reassembly' => 1,
 629     'parameter-problem' => 1,
 630     'bad-header' => 1,
 631     'unknown-header-type' => 1,
 632     'unknown-option' => 1,
 633     'echo-request' => 1,
 634     'echo-reply' => 1,
 635     'router-solicitation' => 1,
 636     'router-advertisement' => 1,
 637     'neighbour-solicitation' => 1,
 638     'neighbour-advertisement' => 1,
 639     'redirect' => 1,
 640 };
 641
 642 sub init_firewall_macros {
 643
 644     $pve_fw_parsed_macros = {};
 645
 646     foreach my $k (keys %$pve_fw_macros) {
 647         my $lc_name = lc($k);
 648         my $macro = $pve_fw_macros->{$k};
 649         if (!ref($macro->[0])) {
 650             $pve_fw_macro_descr->{$k} = shift @$macro;
 651         }
 652         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 653         $pve_fw_parsed_macros->{$k} = $macro;
 654     }
 655 }
 656
 657 init_firewall_macros();
 658
 659 sub get_macros {
 660     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 661 }
 662
 663 my $etc_services;
 664
 665 sub get_etc_services {
 666
 667     return $etc_services if $etc_services;
 668
 669     my $filename = "/etc/services";
 670
 671     my $fh = IO::File->new($filename, O_RDONLY);
 672     if (!$fh) {
 673         warn "unable to read '$filename' - $!\n";
 674         return {};
 675     }
 676
 677     my $services = {};
 678
 679     while (my $line = <$fh>) {
 680         chomp ($line);
 681         next if $line =~m/^#/;
 682         next if ($line =~m/^\s*$/);
 683
 684         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 685             $services->{byid}->{$2}->{name} = $1;
 686             $services->{byid}->{$2}->{port} = $2;
 687             $services->{byid}->{$2}->{$3} = 1;
 688             $services->{byname}->{$1} = $services->{byid}->{$2};
 689         }
 690     }
 691
 692     close($fh);
 693
 694     $etc_services = $services;
 695
 696
 697     return $etc_services;
 698 }
 699
 700 my $etc_protocols;
 701
 702 sub get_etc_protocols {
 703     return $etc_protocols if $etc_protocols;
 704
 705     my $filename = "/etc/protocols";
 706
 707     my $fh = IO::File->new($filename, O_RDONLY);
 708     if (!$fh) {
 709         warn "unable to read '$filename' - $!\n";
 710         return {};
 711     }
 712
 713     my $protocols = {};
 714
 715     while (my $line = <$fh>) {
 716         chomp ($line);
 717         next if $line =~m/^#/;
 718         next if ($line =~m/^\s*$/);
 719
 720         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 721             $protocols->{byid}->{$2}->{name} = $1;
 722             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 723         }
 724     }
 725
 726     close($fh);
 727
 728     # add special case for ICMP v6
 729     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 730     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 731
 732     $etc_protocols = $protocols;
 733
 734     return $etc_protocols;
 735 }
 736
 737 my $ipv4_mask_hash_localnet = {
 738     '255.255.0.0' => 16,
 739     '255.255.128.0' => 17,
 740     '255.255.192.0' => 18,
 741     '255.255.224.0' => 19,
 742     '255.255.240.0' => 20,
 743     '255.255.248.0' => 21,
 744     '255.255.252.0' => 22,
 745     '255.255.254.0' => 23,
 746     '255.255.255.0' => 24,
 747     '255.255.255.128' => 25,
 748     '255.255.255.192' => 26,
 749     '255.255.255.224' => 27,
 750     '255.255.255.240' => 28,
 751     '255.255.255.248' => 29,
 752     '255.255.255.252' => 30,
 753 };
 754
 755 my $__local_network;
 756
 757 sub local_network {
 758     my ($new_value) = @_;
 759
 760     $__local_network = $new_value if defined($new_value);
 761
 762     return $__local_network if defined($__local_network);
 763
 764     eval {
 765         my $nodename = PVE::INotify::nodename();
 766
 767         my $ip = PVE::Cluster::remote_node_ip($nodename);
 768
 769         my $testip = Net::IP->new($ip);
 770
 771         my $routes = PVE::ProcFSTools::read_proc_net_route();
 772         foreach my $entry (@$routes) {
 773             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 774             next if !defined($mask);
 775             return if $mask eq '0.0.0.0';
 776             my $cidr = "$entry->{dest}/$mask";
 777             my $testnet = Net::IP->new($cidr);
 778             if ($testnet->overlaps($testip)) {
 779                 $__local_network = $cidr;
 780                 return;
 781             }
 782         }
 783     };
 784     warn $@ if $@;
 785
 786     return $__local_network;
 787 }
 788
 789 # ipset names are limited to 31 characters,
 790 # and we use '-v4' or '-v6' to indicate IP versions,
 791 # and we use '_swap' suffix for atomic update,
 792 # for example PVEFW-${VMID}-${ipset_name}_swap
 793
 794 my $max_iptables_ipset_name_length = 31 - length("_swap") - length("-v4");
 795
 796 sub compute_ipset_chain_name {
 797     my ($vmid, $ipset_name) = @_;
 798
 799     $vmid = 0 if !defined($vmid);
 800
 801     my $id = "$vmid-${ipset_name}";
 802
 803     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 804         $id = PVE::Tools::fnv31a_hex($id);
 805     }
 806
 807     return "PVEFW-$id";
 808 }
 809
 810 sub compute_ipfilter_ipset_name {
 811     my ($iface) = @_;
 812
 813     return "ipfilter-$iface";
 814 }
 815
 816 sub parse_address_list {
 817     my ($str) = @_;
 818
 819     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 820         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 821         return;
 822     }
 823
 824     if ($str =~ m/^${ip_alias_pattern}$/) {
 825         die "alias name too long\n" if length($str) > $max_alias_name_length;
 826         return;
 827     }
 828
 829     my $count = 0;
 830     my $iprange = 0;
 831     my $ipversion;
 832
 833     foreach my $elem (split(/,/, $str)) {
 834         $count++;
 835         my $ip = Net::IP->new($elem);
 836         if (!$ip) {
 837             my $err = Net::IP::Error();
 838             die "invalid IP address: $err\n";
 839         }
 840         $iprange = 1 if $elem =~ m/-/;
 841
 842         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 843
 844         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 845             if $ipversion && ($new_ipversion != $ipversion);
 846
 847         $ipversion = $new_ipversion;
 848     }
 849
 850     die "you can't use a range in a list\n" if $iprange && $count > 1;
 851
 852     return $ipversion;
 853 }
 854
 855 sub parse_port_name_number_or_range {
 856     my ($str) = @_;
 857
 858     my $services = PVE::Firewall::get_etc_services();
 859     my $count = 0;
 860     my $icmp_port = 0;
 861
 862     foreach my $item (split(/,/, $str)) {
 863         $count++;
 864         if ($item =~ m/^(\d+):(\d+)$/) {
 865             my ($port1, $port2) = ($1, $2);
 866             die "invalid port '$port1'\n" if $port1 > 65535;
 867             die "invalid port '$port2'\n" if $port2 > 65535;
 868         } elsif ($item =~ m/^(\d+)$/) {
 869             my $port = $1;
 870             die "invalid port '$port'\n" if $port > 65535;
 871         } else {
 872             if ($icmp_type_names->{$item}) {
 873                 $icmp_port = 1;
 874             } elsif ($icmpv6_type_names->{$item}) {
 875                 $icmp_port = 1;
 876             } else {
 877                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 878             }
 879         }
 880     }
 881
 882     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 883
 884     return $count;
 885 }
 886
 887 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 888 sub pve_fw_verify_port_spec {
 889    my ($portstr) = @_;
 890
 891    parse_port_name_number_or_range($portstr);
 892
 893    return $portstr;
 894 }
 895
 896 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 897 sub pve_fw_verify_addr_spec {
 898    my ($list) = @_;
 899
 900    parse_address_list($list);
 901
 902    return $list;
 903 }
 904
 905 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 906 sub pve_fw_verify_protocol_spec {
 907    my ($proto) = @_;
 908
 909    my $protocols = get_etc_protocols();
 910
 911    die "unknown protocol '$proto'\n" if $proto &&
 912        !(defined($protocols->{byname}->{$proto}) ||
 913          defined($protocols->{byid}->{$proto}));
 914
 915    return $proto;
 916 }
 917
 918
 919 # helper function for API
 920
 921 sub copy_opject_with_digest {
 922     my ($object) = @_;
 923
 924     my $sha = Digest::SHA->new('sha1');
 925
 926     my $res = {};
 927     foreach my $k (sort keys %$object) {
 928         my $v = $object->{$k};
 929         next if !defined($v);
 930         $res->{$k} = $v;
 931         $sha->add($k, ':', $v, "\n");
 932     }
 933
 934     my $digest = $sha->hexdigest;
 935
 936     $res->{digest} = $digest;
 937
 938     return wantarray ? ($res, $digest) : $res;
 939 }
 940
 941 sub copy_list_with_digest {
 942     my ($list) = @_;
 943
 944     my $sha = Digest::SHA->new('sha1');
 945
 946     my $res = [];
 947     foreach my $entry (@$list) {
 948         my $data = {};
 949         foreach my $k (sort keys %$entry) {
 950             my $v = $entry->{$k};
 951             next if !defined($v);
 952             $data->{$k} = $v;
 953             # Note: digest ignores refs ($rule->{errors})
 954             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 955         }
 956         push @$res, $data;
 957     }
 958
 959     my $digest = $sha->hexdigest;
 960
 961     foreach my $entry (@$res) {
 962         $entry->{digest} = $digest;
 963     }
 964
 965     return wantarray ? ($res, $digest) : $res;
 966 }
 967
 968 my $rule_properties = {
 969     pos => {
 970         description => "Update rule at position <pos>.",
 971         type => 'integer',
 972         minimum => 0,
 973         optional => 1,
 974     },
 975     digest => get_standard_option('pve-config-digest'),
 976     type => {
 977         type => 'string',
 978         optional => 1,
 979         enum => ['in', 'out', 'group'],
 980     },
 981     action => {
 982         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 983         type => 'string',
 984         optional => 1,
 985         pattern => $security_group_name_pattern,
 986         maxLength => 20,
 987         minLength => 2,
 988     },
 989     macro => {
 990         type => 'string',
 991         optional => 1,
 992         maxLength => 128,
 993     },
 994     iface => get_standard_option('pve-iface', { optional => 1 }),
 995     source => {
 996         type => 'string', format => 'pve-fw-addr-spec',
 997         optional => 1,
 998     },
 999     dest => {
1000         type => 'string', format => 'pve-fw-addr-spec',
1001         optional => 1,
1002     },
1003     proto => {
1004         type => 'string', format => 'pve-fw-protocol-spec',
1005         optional => 1,
1006     },
1007     enable => {
1008         type => 'boolean',
1009         optional => 1,
1010     },
1011     sport => {
1012         type => 'string', format => 'pve-fw-port-spec',
1013         optional => 1,
1014     },
1015     dport => {
1016         type => 'string', format => 'pve-fw-port-spec',
1017         optional => 1,
1018     },
1019     comment => {
1020         type => 'string',
1021         optional => 1,
1022     },
1023 };
1024
1025 sub add_rule_properties {
1026     my ($properties) = @_;
1027
1028     foreach my $k (keys %$rule_properties) {
1029         my $h = $rule_properties->{$k};
1030         # copy data, so that we can modify later without side effects
1031         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1032     }
1033
1034     return $properties;
1035 }
1036
1037 sub delete_rule_properties {
1038     my ($rule, $delete_str) = @_;
1039
1040     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1041         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1042             if !defined($rule_properties->{$opt});
1043         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1044             if $opt eq 'type' || $opt eq 'action';
1045         delete $rule->{$opt};
1046     }
1047
1048     return $rule;
1049 }
1050
1051 my $apply_macro = sub {
1052     my ($macro_name, $param, $verify) = @_;
1053
1054     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1055     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1056
1057     my $rules = [];
1058
1059     foreach my $templ (@$macro_rules) {
1060         my $rule = {};
1061         my $param_used = {};
1062         foreach my $k (keys %$templ) {
1063             my $v = $templ->{$k};
1064             if ($v eq 'PARAM') {
1065                 $v = $param->{$k};
1066                 $param_used->{$k} = 1;
1067             } elsif ($v eq 'DEST') {
1068                 $v = $param->{dest};
1069                 $param_used->{dest} = 1;
1070             } elsif ($v eq 'SOURCE') {
1071                 $v = $param->{source};
1072                 $param_used->{source} = 1;
1073             }
1074
1075             if (!defined($v)) {
1076                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1077                 raise_param_exc({ macro => $msg }) if $verify;
1078                 die "$msg\n";
1079             }
1080             $rule->{$k} = $v;
1081         }
1082         foreach my $k (keys %$param) {
1083             next if $k eq 'macro';
1084             next if !defined($param->{$k});
1085             next if $param_used->{$k};
1086             if (defined($rule->{$k})) {
1087                 if ($rule->{$k} ne $param->{$k}) {
1088                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1089                     raise_param_exc({ $k => $msg }) if $verify;
1090                     die "$msg\n";
1091                 }
1092             } else {
1093                 $rule->{$k} = $param->{$k};
1094             }
1095         }
1096         push @$rules, $rule;
1097     }
1098
1099     return $rules;
1100 };
1101
1102 my $rule_env_iface_lookup = {
1103     'ct' => 1,
1104     'vm' => 1,
1105     'group' => 0,
1106     'cluster' => 1,
1107     'host' => 1,
1108 };
1109
1110 sub verify_rule {
1111     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1112
1113     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1114
1115     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1116     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1117
1118     my $errors = $rule->{errors} || {};
1119
1120     my $error_count = 0;
1121
1122     my $add_error = sub {
1123         my ($param, $msg)  = @_;
1124         chomp $msg;
1125         raise_param_exc({ $param => $msg }) if !$noerr;
1126         $error_count++;
1127         $errors->{$param} = $msg if !$errors->{$param};
1128     };
1129
1130     my $check_ipset_or_alias_property = sub {
1131         my ($name, $expected_ipversion) = @_;
1132
1133         if (my $value = $rule->{$name}) {
1134             if ($value =~ m/^\+/) {
1135                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1136                     &$add_error($name, "no such ipset '$1'")
1137                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1138
1139                 } else {
1140                     &$add_error($name, "invalid ipset name '$value'");
1141                 }
1142             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1143                 my $alias = lc($value);
1144                 &$add_error($name, "no such alias '$value'")
1145                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1146
1147                 my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1148                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1149
1150                 die "detected mixed ipv4/ipv6 adresses in rule\n"
1151                     if $expected_ipversion && ($expected_ipversion != $e->{ipversion});
1152             }
1153         }
1154     };
1155
1156     my $type = $rule->{type};
1157     my $action = $rule->{action};
1158
1159     &$add_error('type', "missing property") if !$type;
1160     &$add_error('action', "missing property") if !$action;
1161
1162     if ($type) {
1163         if ($type eq  'in' || $type eq 'out') {
1164             &$add_error('action', "unknown action '$action'")
1165                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1166         } elsif ($type eq 'group') {
1167             &$add_error('type', "security groups not allowed")
1168                 if !$allow_groups;
1169             &$add_error('action', "invalid characters in security group name")
1170                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1171         } else {
1172             &$add_error('type', "unknown rule type '$type'");
1173         }
1174     }
1175
1176     if ($rule->{iface}) {
1177         &$add_error('type', "parameter -i not allowed for this rule type")
1178             if !$allow_iface;
1179         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1180         &$add_error('iface', $@) if $@;
1181         if ($rule_env eq 'vm') {
1182             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1183                 if $rule->{iface} !~  m/^net(\d+)$/;
1184         } elsif ($rule_env eq 'ct') {
1185             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1186                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1187         }
1188     }
1189
1190     if ($rule->{macro}) {
1191         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1192             $rule->{macro} = $preferred_name;
1193         } else {
1194             &$add_error('macro', "unknown macro '$rule->{macro}'");
1195         }
1196     }
1197
1198     my $ipversion;
1199     my $set_ip_version = sub {
1200         my $vers = shift;
1201         if ($vers) {
1202             die "detected mixed ipv4/ipv6 adresses in rule\n"
1203                 if $ipversion && ($vers != $ipversion);
1204             $ipversion = $vers;
1205         }
1206     };
1207
1208     if ($rule->{proto}) {
1209         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1210         &$add_error('proto', $@) if $@;
1211         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1212         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1213     }
1214
1215     if ($rule->{dport}) {
1216         eval { parse_port_name_number_or_range($rule->{dport}); };
1217         &$add_error('dport', $@) if $@;
1218         &$add_error('proto', "missing property - 'dport' requires this property")
1219             if !$rule->{proto};
1220     }
1221
1222     if ($rule->{sport}) {
1223         eval { parse_port_name_number_or_range($rule->{sport}); };
1224         &$add_error('sport', $@) if $@;
1225         &$add_error('proto', "missing property - 'sport' requires this property")
1226             if !$rule->{proto};
1227     }
1228
1229     if ($rule->{source}) {
1230         eval {
1231             my $source_ipversion = parse_address_list($rule->{source});
1232             &$set_ip_version($source_ipversion);
1233         };
1234         &$add_error('source', $@) if $@;
1235         &$check_ipset_or_alias_property('source', $ipversion);
1236     }
1237
1238     if ($rule->{dest}) {
1239         eval {
1240             my $dest_ipversion = parse_address_list($rule->{dest});
1241             &$set_ip_version($dest_ipversion);
1242         };
1243         &$add_error('dest', $@) if $@;
1244         &$check_ipset_or_alias_property('dest', $ipversion);
1245     }
1246
1247     if ($rule->{macro} && !$error_count) {
1248         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1249         if (my $err = $@) {
1250             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1251                 my $eh = $err->{errors};
1252                 foreach my $p (keys %$eh) {
1253                     &$add_error($p, $eh->{$p});
1254                 }
1255             } else {
1256                 &$add_error('macro', "$err");
1257             }
1258         }
1259     }
1260
1261     $rule->{errors} = $errors if $error_count;
1262     $rule->{ipversion} = $ipversion if $ipversion;
1263
1264     return $rule;
1265 }
1266
1267 sub copy_rule_data {
1268     my ($rule, $param) = @_;
1269
1270     foreach my $k (keys %$rule_properties) {
1271         if (defined(my $v = $param->{$k})) {
1272             if ($v eq '' || $v eq '-') {
1273                 delete $rule->{$k};
1274             } else {
1275                 $rule->{$k} = $v;
1276             }
1277         }
1278     }
1279
1280     return $rule;
1281 }
1282
1283 sub rules_modify_permissions {
1284     my ($rule_env) = @_;
1285
1286     if ($rule_env eq 'host') {
1287         return {
1288             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1289         };
1290     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1291         return {
1292             check => ['perm', '/', [ 'Sys.Modify' ]],
1293         };
1294     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1295         return {
1296             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1297         }
1298     }
1299
1300     return undef;
1301 }
1302
1303 sub rules_audit_permissions {
1304     my ($rule_env) = @_;
1305
1306     if ($rule_env eq 'host') {
1307         return {
1308             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1309         };
1310     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1311         return {
1312             check => ['perm', '/', [ 'Sys.Audit' ]],
1313         };
1314     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1315         return {
1316             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1317         }
1318     }
1319
1320     return undef;
1321 }
1322
1323 # core functions
1324 my $bridge_firewall_enabled = 0;
1325
1326 sub enable_bridge_firewall {
1327
1328     return if $bridge_firewall_enabled; # only once
1329
1330     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1331     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1332
1333     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1334     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1335
1336     $bridge_firewall_enabled = 1;
1337 }
1338
1339 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1340
1341 sub iptables_restore_cmdlist {
1342     my ($cmdlist) = @_;
1343
1344     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1345 }
1346
1347 sub ipset_restore_cmdlist {
1348     my ($cmdlist) = @_;
1349
1350     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1351 }
1352
1353 sub iptables_get_chains {
1354
1355     my $res = {};
1356
1357     # check what chains we want to track
1358     my $is_pvefw_chain = sub {
1359         my $name = shift;
1360
1361         return 1 if $name =~ m/^PVEFW-\S+$/;
1362
1363         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1364
1365         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1366
1367         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1368
1369         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1370         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1371
1372         return undef;
1373     };
1374
1375     my $table = '';
1376
1377     my $hooks = {};
1378
1379     my $parser = sub {
1380         my $line = shift;
1381
1382         return if $line =~ m/^#/;
1383         return if $line =~ m/^\s*$/;
1384
1385         if ($line =~ m/^\*(\S+)$/) {
1386             $table = $1;
1387             return;
1388         }
1389
1390         return if $table ne 'filter';
1391
1392         if ($line =~ m/^:(\S+)\s/) {
1393             my $chain = $1;
1394             return if !&$is_pvefw_chain($chain);
1395             $res->{$chain} = "unknown";
1396         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1397             my ($chain, $sig) = ($1, $2);
1398             return if !&$is_pvefw_chain($chain);
1399             $res->{$chain} = $sig;
1400         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1401             $hooks->{$1} = 1;
1402         } else {
1403             # simply ignore the rest
1404             return;
1405         }
1406     };
1407
1408     run_command("/sbin/iptables-save", outfunc => $parser);
1409
1410     return wantarray ? ($res, $hooks) : $res;
1411 }
1412
1413 sub iptables_chain_digest {
1414     my ($rules) = @_;
1415     my $digest = Digest::SHA->new('sha1');
1416     foreach my $rule (@$rules) { # order is important
1417         $digest->add($rule);
1418     }
1419     return $digest->b64digest;
1420 }
1421
1422 sub ipset_chain_digest {
1423     my ($rules) = @_;
1424
1425     my $digest = Digest::SHA->new('sha1');
1426     foreach my $rule (sort @$rules) { # note: sorted
1427         $digest->add($rule);
1428     }
1429     return $digest->b64digest;
1430 }
1431
1432 sub ipset_get_chains {
1433
1434     my $res = {};
1435     my $chains = {};
1436
1437     my $parser = sub {
1438         my $line = shift;
1439
1440         return if $line =~ m/^#/;
1441         return if $line =~ m/^\s*$/;
1442         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1443             my $chain = $1;
1444             $line =~ s/\s+$//; # delete trailing white space
1445             push @{$chains->{$chain}}, $line;
1446         } else {
1447             # simply ignore the rest
1448             return;
1449         }
1450     };
1451
1452     run_command("/usr/sbin/ipset save", outfunc => $parser);
1453
1454     # compute digest for each chain
1455     foreach my $chain (keys %$chains) {
1456         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1457     }
1458
1459     return $res;
1460 }
1461
1462 sub ruleset_generate_cmdstr {
1463     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1464
1465     return if defined($rule->{enable}) && !$rule->{enable};
1466     return if $rule->{errors};
1467
1468     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1469
1470     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1471     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1472
1473     my @cmd = ();
1474
1475     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1476     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1477
1478     my $source = $rule->{source};
1479     my $dest = $rule->{dest};
1480
1481     if ($source) {
1482         if ($source =~ m/^\+/) {
1483             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1484                 my $name = $1;
1485                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1486                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1487                     push @cmd, "-m set --match-set ${ipset_chain} src";
1488                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1489                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1490                     push @cmd, "-m set --match-set ${ipset_chain} src";
1491                 } else {
1492                     die "no such ipset '$name'\n";
1493                 }
1494             } else {
1495                 die "invalid security group name '$source'\n";
1496             }
1497         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1498             my $alias = lc($source);
1499             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1500             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1501             die "no such alias '$source'\n" if !$e;
1502             push @cmd, "-s $e->{cidr}";
1503         } elsif ($source =~ m/\-/){
1504             push @cmd, "-m iprange --src-range $source";
1505         } else {
1506             push @cmd, "-s $source";
1507         }
1508     }
1509
1510     if ($dest) {
1511         if ($dest =~ m/^\+/) {
1512             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1513                 my $name = $1;
1514                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1515                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1516                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1517                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1518                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1519                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1520                 } else {
1521                     die "no such ipset '$name'\n";
1522                 }
1523             } else {
1524                 die "invalid security group name '$dest'\n";
1525             }
1526         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1527             my $alias = lc($dest);
1528             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1529             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1530             die "no such alias '$dest'\n" if !$e;
1531             push @cmd, "-d $e->{cidr}";
1532         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1533             push @cmd, "-m iprange --dst-range $dest";
1534         } else {
1535             push @cmd, "-d $dest";
1536         }
1537     }
1538
1539     if ($rule->{proto}) {
1540         push @cmd, "-p $rule->{proto}";
1541
1542         my $multiport = 0;
1543         $multiport++ if $nbdport > 1;
1544         $multiport++ if $nbsport > 1;
1545
1546         push @cmd, "--match multiport" if $multiport;
1547
1548         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1549             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1550
1551         if ($rule->{dport}) {
1552             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1553                 # Note: we use dport to store --icmp-type
1554                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1555                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1556             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1557                 # Note: we use dport to store --icmpv6-type
1558                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1559                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1560             } else {
1561                 if ($nbdport > 1) {
1562                     if ($multiport == 2) {
1563                         push @cmd,  "--ports $rule->{dport}";
1564                     } else {
1565                         push @cmd, "--dports $rule->{dport}";
1566                     }
1567                 } else {
1568                     push @cmd, "--dport $rule->{dport}";
1569                 }
1570             }
1571         }
1572
1573         if ($rule->{sport}) {
1574             if ($nbsport > 1) {
1575                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1576             } else {
1577                 push @cmd, "--sport $rule->{sport}";
1578             }
1579         }
1580     } elsif ($rule->{dport} || $rule->{sport}) {
1581         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1582         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1583     }
1584
1585     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1586
1587     if (my $action = $rule->{action}) {
1588         $action = $actions->{$action} if defined($actions->{$action});
1589         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1590         push @cmd, $goto ? "-g $action" : "-j $action";
1591     }
1592
1593     return scalar(@cmd) ? join(' ', @cmd) : undef;
1594 }
1595
1596 sub ruleset_generate_rule {
1597     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1598
1599     my $rules;
1600
1601     if ($rule->{macro}) {
1602         $rules = &$apply_macro($rule->{macro}, $rule);
1603     } else {
1604         $rules = [ $rule ];
1605     }
1606
1607     # update all or nothing
1608
1609     my @cmds = ();
1610     foreach my $tmp (@$rules) {
1611         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1612             push @cmds, $cmdstr;
1613         }
1614     }
1615
1616     foreach my $cmdstr (@cmds) {
1617         ruleset_addrule($ruleset, $chain, $cmdstr);
1618     }
1619 }
1620
1621 sub ruleset_generate_rule_insert {
1622     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1623
1624     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1625
1626     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1627         ruleset_insertrule($ruleset, $chain, $cmdstr);
1628     }
1629 }
1630
1631 sub ruleset_create_chain {
1632     my ($ruleset, $chain) = @_;
1633
1634     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1635     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1636
1637     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1638
1639     $ruleset->{$chain} = [];
1640 }
1641
1642 sub ruleset_chain_exist {
1643     my ($ruleset, $chain) = @_;
1644
1645     return $ruleset->{$chain} ? 1 : undef;
1646 }
1647
1648 sub ruleset_addrule {
1649    my ($ruleset, $chain, $rule) = @_;
1650
1651    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1652
1653    push @{$ruleset->{$chain}}, "-A $chain $rule";
1654 }
1655
1656 sub ruleset_insertrule {
1657    my ($ruleset, $chain, $rule) = @_;
1658
1659    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1660
1661    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1662 }
1663
1664 sub get_log_rule_base {
1665     my ($chain, $vmid, $msg, $loglevel) = @_;
1666
1667     die "internal error - no log level" if !defined($loglevel);
1668
1669     $vmid = 0 if !defined($vmid);
1670
1671     # Note: we use special format for prefix to pass further
1672     # info to log daemon (VMID, LOGVELEL and CHAIN)
1673
1674     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1675 }
1676
1677 sub ruleset_addlog {
1678     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1679
1680     return if !defined($loglevel);
1681
1682     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1683
1684     $logrule = "$rule $logrule" if defined($rule);
1685
1686     ruleset_addrule($ruleset, $chain, $logrule);
1687 }
1688
1689 sub ruleset_add_chain_policy {
1690     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1691
1692     if ($policy eq 'ACCEPT') {
1693
1694         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1695                               { ACCEPT =>  $accept_action});
1696
1697     } elsif ($policy eq 'DROP') {
1698
1699         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1700
1701         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1702
1703         ruleset_addrule($ruleset, $chain, "-j DROP");
1704     } elsif ($policy eq 'REJECT') {
1705         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1706
1707         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1708
1709         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1710     } else {
1711         # should not happen
1712         die "internal error: unknown policy '$policy'";
1713     }
1714 }
1715
1716 sub ruleset_chain_add_conn_filters {
1717     my ($ruleset, $chain, $accept) = @_;
1718
1719     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1720     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1721 }
1722
1723 sub ruleset_chain_add_input_filters {
1724     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1725
1726     if ($cluster_conf->{ipset}->{blacklist}){
1727         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1728             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1729             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1730             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1731         }
1732         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1733         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1734     }
1735
1736     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1737         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1738     }
1739
1740     if ($options->{tcpflags}) {
1741         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1742     }
1743 }
1744
1745 sub ruleset_create_vm_chain {
1746     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1747
1748     ruleset_create_chain($ruleset, $chain);
1749     my $accept = generate_nfqueue($options);
1750
1751     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1752         if ($direction eq 'OUT') {
1753             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1754                                                       proto => 'udp', sport => 68, dport => 67 });
1755         } else {
1756             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1757                                                       proto => 'udp', sport => 67, dport => 68 });
1758         }
1759     }
1760
1761     if ($direction eq 'OUT') {
1762         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1763             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1764         }
1765         if ($ipfilter_ipset) {
1766             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1767         }
1768         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1769     }
1770 }
1771
1772 sub ruleset_add_group_rule {
1773     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1774
1775     my $group = $rule->{action};
1776     my $group_chain = "GROUP-$group-$direction";
1777     if(!ruleset_chain_exist($ruleset, $group_chain)){
1778         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1779     }
1780
1781     if ($direction eq 'OUT' && $rule->{iface_out}) {
1782         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1783     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1784         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1785     } else {
1786         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1787     }
1788
1789     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1790 }
1791
1792 sub ruleset_generate_vm_rules {
1793     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1794
1795     my $lc_direction = lc($direction);
1796
1797     my $in_accept = generate_nfqueue($options);
1798
1799     foreach my $rule (@$rules) {
1800         next if $rule->{iface} && $rule->{iface} ne $netid;
1801         next if !$rule->{enable} || $rule->{errors};
1802         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1803
1804         if ($rule->{type} eq 'group') {
1805             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1806                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1807         } else {
1808             next if $rule->{type} ne $lc_direction;
1809             eval {
1810                 if ($direction eq 'OUT') {
1811                     ruleset_generate_rule($ruleset, $chain, $rule,
1812                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1813                                           undef, $cluster_conf, $vmfw_conf);
1814                 } else {
1815                     ruleset_generate_rule($ruleset, $chain, $rule,
1816                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1817                                           undef, $cluster_conf, $vmfw_conf);
1818                 }
1819             };
1820             warn $@ if $@;
1821         }
1822     }
1823 }
1824
1825 sub generate_nfqueue {
1826     my ($options) = @_;
1827
1828     if ($options->{ips}) {
1829         my $action = "NFQUEUE";
1830         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1831             if (defined($3) && defined($1)) {
1832                 $action .= " --queue-balance $1:$3";
1833             } elsif (defined($1)) {
1834                 $action .= " --queue-num $1";
1835             }
1836         }
1837         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1838         return $action;
1839     } else {
1840         return "ACCEPT";
1841     }
1842 }
1843
1844 sub ruleset_generate_vm_ipsrules {
1845     my ($ruleset, $options, $direction, $iface) = @_;
1846
1847     if ($options->{ips} && $direction eq 'IN') {
1848         my $nfqueue = generate_nfqueue($options);
1849
1850         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1851             ruleset_create_chain($ruleset, "PVEFW-IPS");
1852         }
1853
1854         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1855     }
1856 }
1857
1858 sub generate_venet_rules_direction {
1859     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1860
1861     my $lc_direction = lc($direction);
1862
1863     my $rules = $vmfw_conf->{rules};
1864
1865     my $options = $vmfw_conf->{options};
1866     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1867
1868     my $chain = "venet0-$vmid-$direction";
1869
1870     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1871
1872     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1873
1874     # implement policy
1875     my $policy;
1876
1877     if ($direction eq 'OUT') {
1878         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1879     } else {
1880         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1881     }
1882
1883     my $accept = generate_nfqueue($options);
1884     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1885     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1886
1887     if ($direction eq 'OUT') {
1888         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1889             action => $chain,
1890             source => $ip,
1891             iface_in => 'venet0'});
1892     } else {
1893         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1894             action => $chain,
1895             dest => $ip,
1896             iface_out => 'venet0'});
1897     }
1898 }
1899
1900 sub generate_tap_rules_direction {
1901     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
1902
1903     my $lc_direction = lc($direction);
1904
1905     my $rules = $vmfw_conf->{rules};
1906
1907     my $options = $vmfw_conf->{options};
1908     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1909
1910     my $tapchain = "$iface-$direction";
1911
1912     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1913     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1914         if $vmfw_conf->{ipset}->{$ipfilter_name};
1915
1916     # create chain with mac and ip filter
1917     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1918
1919     if ($options->{enable}) {
1920         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
1921
1922         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1923
1924         # implement policy
1925         my $policy;
1926
1927         if ($direction eq 'OUT') {
1928             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1929         } else {
1930         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1931         }
1932
1933         my $accept = generate_nfqueue($options);
1934         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1935         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1936     } else {
1937         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1938         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1939     }
1940
1941     # plug the tap chain to bridge chain
1942     if ($direction eq 'IN') {
1943         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1944                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1945     } else {
1946         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1947                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1948     }
1949 }
1950
1951 sub enable_host_firewall {
1952     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
1953
1954     my $options = $hostfw_conf->{options};
1955     my $cluster_options = $cluster_conf->{options};
1956     my $rules = $hostfw_conf->{rules};
1957     my $cluster_rules = $cluster_conf->{rules};
1958
1959     # host inbound firewall
1960     my $chain = "PVEFW-HOST-IN";
1961     ruleset_create_chain($ruleset, $chain);
1962
1963     my $loglevel = get_option_log_level($options, "log_level_in");
1964
1965     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1966
1967     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1968     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1969
1970     # we use RETURN because we need to check also tap rules
1971     my $accept_action = 'RETURN';
1972
1973     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1974
1975     # add host rules first, so that cluster wide rules can be overwritten
1976     foreach my $rule (@$rules, @$cluster_rules) {
1977         next if !$rule->{enable} || $rule->{errors};
1978
1979         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1980
1981         eval {
1982             if ($rule->{type} eq 'group') {
1983                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
1984             } elsif ($rule->{type} eq 'in') {
1985                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1986                                       undef, $cluster_conf, $hostfw_conf);
1987             }
1988         };
1989         warn $@ if $@;
1990         delete $rule->{iface_in};
1991     }
1992
1993     # allow standard traffic for management ipset (includes cluster network)
1994     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1995     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1996     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1997     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1998     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1999     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2000
2001     my $localnet = local_network();
2002
2003     # corosync
2004     if ($localnet) {
2005         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2006         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2007         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2008     }
2009
2010     # implement input policy
2011     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2012     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
2013
2014     # host outbound firewall
2015     $chain = "PVEFW-HOST-OUT";
2016     ruleset_create_chain($ruleset, $chain);
2017
2018     $loglevel = get_option_log_level($options, "log_level_out");
2019
2020     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2021
2022     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2023
2024     # we use RETURN because we may want to check other thigs later
2025     $accept_action = 'RETURN';
2026
2027     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2028
2029     # add host rules first, so that cluster wide rules can be overwritten
2030     foreach my $rule (@$rules, @$cluster_rules) {
2031         next if !$rule->{enable} || $rule->{errors};
2032
2033         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2034         eval {
2035             if ($rule->{type} eq 'group') {
2036                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2037             } elsif ($rule->{type} eq 'out') {
2038                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2039                                       undef, $cluster_conf, $hostfw_conf);
2040             }
2041         };
2042         warn $@ if $@;
2043         delete $rule->{iface_out};
2044     }
2045
2046     # allow standard traffic on cluster network
2047     if ($localnet) {
2048         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2049         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2050         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2051         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2052
2053         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2054         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2055         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2056     }
2057
2058     # implement output policy
2059     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2060     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
2061
2062     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2063     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2064 }
2065
2066 sub generate_group_rules {
2067     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2068
2069     my $rules = $cluster_conf->{groups}->{$group};
2070
2071     if (!$rules) {
2072         warn "no such security group '$group'\n";
2073         $rules = []; # create empty chain
2074     }
2075
2076     my $chain = "GROUP-${group}-IN";
2077
2078     ruleset_create_chain($ruleset, $chain);
2079     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2080
2081     foreach my $rule (@$rules) {
2082         next if $rule->{type} ne 'in';
2083         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2084         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2085     }
2086
2087     $chain = "GROUP-${group}-OUT";
2088
2089     ruleset_create_chain($ruleset, $chain);
2090     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2091
2092     foreach my $rule (@$rules) {
2093         next if $rule->{type} ne 'out';
2094         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2095         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2096         # check also other tap rules later
2097         ruleset_generate_rule($ruleset, $chain, $rule,
2098                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2099     }
2100 }
2101
2102 my $MAX_NETS = 32;
2103 my $valid_netdev_names = {};
2104 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2105     $valid_netdev_names->{"net$i"} = 1;
2106 }
2107
2108 sub parse_fw_rule {
2109     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2110
2111     my $orig_line = $line;
2112
2113     my $rule = {};
2114
2115     # we can add single line comments to the end of the rule
2116     if ($line =~ s/#\s*(.*?)\s*$//) {
2117         $rule->{comment} = decode('utf8', $1);
2118     }
2119
2120     # we can disable a rule when prefixed with '|'
2121
2122     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2123
2124     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2125         die "unable to parse rule: $line\n";
2126
2127     $rule->{type} = lc($1);
2128     $rule->{action} = $2;
2129
2130     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2131         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2132             $rule->{macro} = $1;
2133             $rule->{action} = $2;
2134         }
2135     }
2136
2137     while (length($line)) {
2138         if ($line =~ s/^-i (\S+)\s*//) {
2139             $rule->{iface} = $1;
2140             next;
2141         }
2142
2143         last if $rule->{type} eq 'group';
2144
2145         if ($line =~ s/^-p (\S+)\s*//) {
2146             $rule->{proto} = $1;
2147             next;
2148         }
2149
2150         if ($line =~ s/^-dport (\S+)\s*//) {
2151             $rule->{dport} = $1;
2152             next;
2153         }
2154
2155         if ($line =~ s/^-sport (\S+)\s*//) {
2156             $rule->{sport} = $1;
2157             next;
2158         }
2159         if ($line =~ s/^-source (\S+)\s*//) {
2160             $rule->{source} = $1;
2161             next;
2162         }
2163         if ($line =~ s/^-dest (\S+)\s*//) {
2164             $rule->{dest} = $1;
2165             next;
2166         }
2167
2168         last;
2169     }
2170
2171     die "unable to parse rule parameters: $line\n" if length($line);
2172
2173     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2174     if ($verbose && $rule->{errors}) {
2175         warn "$prefix - errors in rule parameters: $orig_line\n";
2176         foreach my $p (keys %{$rule->{errors}}) {
2177             warn "  $p: $rule->{errors}->{$p}\n";
2178         }
2179     }
2180
2181     return $rule;
2182 }
2183
2184 sub parse_vmfw_option {
2185     my ($line) = @_;
2186
2187     my ($opt, $value);
2188
2189     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2190
2191     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2192         $opt = lc($1);
2193         $value = int($2);
2194     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2195         $opt = lc($1);
2196         $value = $2 ? lc($3) : '';
2197     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2198         $opt = lc($1);
2199         $value = uc($3);
2200     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2201         $opt = lc($1);
2202         $value = $2;
2203     } else {
2204         die "can't parse option '$line'\n"
2205     }
2206
2207     return ($opt, $value);
2208 }
2209
2210 sub parse_hostfw_option {
2211     my ($line) = @_;
2212
2213     my ($opt, $value);
2214
2215     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2216
2217     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2218         $opt = lc($1);
2219         $value = int($2);
2220     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2221         $opt = lc($1);
2222         $value = $2 ? lc($3) : '';
2223     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2224         $opt = lc($1);
2225         $value = int($2);
2226     } else {
2227         die "can't parse option '$line'\n"
2228     }
2229
2230     return ($opt, $value);
2231 }
2232
2233 sub parse_clusterfw_option {
2234     my ($line) = @_;
2235
2236     my ($opt, $value);
2237
2238     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2239         $opt = lc($1);
2240         $value = int($2);
2241     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2242         $opt = lc($1);
2243         $value = uc($3);
2244     } else {
2245         die "can't parse option '$line'\n"
2246     }
2247
2248     return ($opt, $value);
2249 }
2250
2251 sub resolve_alias {
2252     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2253
2254     my $alias = lc($cidr);
2255     my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2256     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2257
2258     die "no such alias '$cidr'\n" if !$e;;
2259
2260     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2261 }
2262
2263 sub parse_ip_or_cidr {
2264     my ($cidr) = @_;
2265
2266     my $ipversion;
2267
2268     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2269         $cidr =~ s|/128$||;
2270         $ipversion = 6;
2271     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2272         $cidr =~ s|/32$||;
2273         $ipversion = 4;
2274     } else {
2275         die "value does not look like a valid IP address or CIDR network\n";
2276     }
2277
2278     return wantarray ? ($cidr, $ipversion) : $cidr;
2279 }
2280
2281 sub parse_alias {
2282     my ($line) = @_;
2283
2284     # we can add single line comments to the end of the line
2285     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2286
2287     if ($line =~ m/^(\S+)\s(\S+)$/) {
2288         my ($name, $cidr) = ($1, $2);
2289         my $ipversion;
2290
2291         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2292
2293         my $data = {
2294             name => $name,
2295             cidr => $cidr,
2296             ipversion => $ipversion,
2297         };
2298         $data->{comment} = $comment  if $comment;
2299         return $data;
2300     }
2301
2302     return undef;
2303 }
2304
2305 sub generic_fw_config_parser {
2306     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2307
2308     my $section;
2309     my $group;
2310
2311     my $res = $empty_conf;
2312
2313     while (defined(my $line = <$fh>)) {
2314         next if $line =~ m/^#/;
2315         next if $line =~ m/^\s*$/;
2316
2317         chomp $line;
2318
2319         my $linenr = $fh->input_line_number();
2320         my $prefix = "$filename (line $linenr)";
2321
2322         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2323             $section = 'options';
2324             next;
2325         }
2326
2327         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2328             $section = 'aliases';
2329             next;
2330         }
2331
2332         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2333             $section = 'groups';
2334             $group = lc($1);
2335             my $comment = $2;
2336             eval {
2337                 die "security group name too long\n" if length($group) > $max_group_name_length;
2338                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2339             };
2340             if (my $err = $@) {
2341                 ($section, $group, $comment) = undef;
2342                 warn "$prefix: $err";
2343                 next;
2344             }
2345
2346             $res->{$section}->{$group} = [];
2347             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2348                 if $comment;
2349             next;
2350         }
2351
2352         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2353             $section = 'rules';
2354             next;
2355         }
2356
2357         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2358             $section = 'ipset';
2359             $group = lc($1);
2360             my $comment = $2;
2361             eval {
2362                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2363                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2364             };
2365             if (my $err = $@) {
2366                 ($section, $group, $comment) = undef;
2367                 warn "$prefix: $err";
2368                 next;
2369             }
2370
2371             $res->{$section}->{$group} = [];
2372             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2373                 if $comment;
2374             next;
2375         }
2376
2377         if (!$section) {
2378             warn "$prefix: skip line - no section\n";
2379             next;
2380         }
2381
2382         if ($section eq 'options') {
2383             eval {
2384                 my ($opt, $value);
2385                 if ($rule_env eq 'cluster') {
2386                     ($opt, $value) = parse_clusterfw_option($line);
2387                 } elsif ($rule_env eq 'host') {
2388                     ($opt, $value) = parse_hostfw_option($line);
2389                 } else {
2390                     ($opt, $value) = parse_vmfw_option($line);
2391                 }
2392                 $res->{options}->{$opt} = $value;
2393             };
2394             warn "$prefix: $@" if $@;
2395         } elsif ($section eq 'aliases') {
2396             eval {
2397                 my $data = parse_alias($line);
2398                 $res->{aliases}->{lc($data->{name})} = $data;
2399             };
2400             warn "$prefix: $@" if $@;
2401         } elsif ($section eq 'rules') {
2402             my $rule;
2403             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2404             if (my $err = $@) {
2405                 warn "$prefix: $err";
2406                 next;
2407             }
2408             push @{$res->{$section}}, $rule;
2409         } elsif ($section eq 'groups') {
2410             my $rule;
2411             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2412             if (my $err = $@) {
2413                 warn "$prefix: $err";
2414                 next;
2415             }
2416             push @{$res->{$section}->{$group}}, $rule;
2417         } elsif ($section eq 'ipset') {
2418             # we can add single line comments to the end of the rule
2419             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2420
2421             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2422             my $nomatch = $1;
2423             my $cidr = $2;
2424             my $errors;
2425
2426             if ($nomatch && !$feature_ipset_nomatch) {
2427                 $errors->{nomatch} = "nomatch not supported by kernel";
2428             }
2429
2430             eval {
2431                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2432                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2433                 } else {
2434                     $cidr = parse_ip_or_cidr($cidr);
2435                 }
2436             };
2437             if (my $err = $@) {
2438                 chomp $err;
2439                 $errors->{cidr} = $err;
2440             }
2441
2442             my $entry = { cidr => $cidr };
2443             $entry->{nomatch} = 1 if $nomatch;
2444             $entry->{comment} = $comment if $comment;
2445             $entry->{errors} =  $errors if $errors;
2446
2447             if ($verbose && $errors) {
2448                 warn "$prefix - errors in ipset '$group': $line\n";
2449                 foreach my $p (keys %{$errors}) {
2450                     warn "  $p: $errors->{$p}\n";
2451                 }
2452             }
2453
2454             push @{$res->{$section}->{$group}}, $entry;
2455         } else {
2456             warn "$prefix: skip line - unknown section\n";
2457             next;
2458         }
2459     }
2460
2461     return $res;
2462 }
2463
2464 sub parse_hostfw_config {
2465     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2466
2467     my $empty_conf = { rules => [], options => {}};
2468
2469     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2470 }
2471
2472 sub parse_vmfw_config {
2473     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2474
2475     my $empty_conf = {
2476         rules => [],
2477         options => {},
2478         aliases => {},
2479         ipset => {} ,
2480         ipset_comments => {},
2481     };
2482
2483     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2484 }
2485
2486 sub parse_clusterfw_config {
2487     my ($filename, $fh, $verbose) = @_;
2488
2489     my $section;
2490     my $group;
2491
2492     my $empty_conf = {
2493         rules => [],
2494         options => {},
2495         aliases => {},
2496         groups => {},
2497         group_comments => {},
2498         ipset => {} ,
2499         ipset_comments => {},
2500     };
2501
2502     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2503 }
2504
2505 sub run_locked {
2506     my ($code, @param) = @_;
2507
2508     my $timeout = 10;
2509
2510     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2511
2512     die $@ if $@;
2513
2514     return $res;
2515 }
2516
2517 sub read_local_vm_config {
2518
2519     my $openvz = {};
2520     my $qemu = {};
2521
2522     my $vmdata = { openvz => $openvz, qemu => $qemu };
2523
2524     my $vmlist = PVE::Cluster::get_vmlist();
2525     return $vmdata if !$vmlist || !$vmlist->{ids};
2526     my $ids = $vmlist->{ids};
2527
2528     foreach my $vmid (keys %$ids) {
2529         next if !$vmid; # skip VE0
2530         my $d = $ids->{$vmid};
2531         next if !$d->{node} || $d->{node} ne $nodename;
2532         next if !$d->{type};
2533         if ($d->{type} eq 'openvz') {
2534             if ($have_pve_manager) {
2535                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2536                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2537                     $openvz->{$vmid} = $conf;
2538                 }
2539             }
2540         } elsif ($d->{type} eq 'qemu') {
2541             if ($have_qemu_server) {
2542                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2543                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2544                     $qemu->{$vmid} = $conf;
2545                 }
2546             }
2547         }
2548     }
2549
2550     return $vmdata;
2551 };
2552
2553 sub load_vmfw_conf {
2554     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2555
2556     my $vmfw_conf = {};
2557
2558     $dir = $pvefw_conf_dir if !defined($dir);
2559
2560     my $filename = "$dir/$vmid.fw";
2561     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2562         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2563         $vmfw_conf->{vmid} = $vmid;
2564     }
2565
2566     return $vmfw_conf;
2567 }
2568
2569 my $format_rules = sub {
2570     my ($rules, $allow_iface) = @_;
2571
2572     my $raw = '';
2573
2574     foreach my $rule (@$rules) {
2575         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2576             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2577             $raw .= uc($rule->{type});
2578             if ($rule->{macro}) {
2579                 $raw .= " $rule->{macro}($rule->{action})";
2580             } else {
2581                 $raw .= " " . $rule->{action};
2582             }
2583             if ($allow_iface && $rule->{iface}) {
2584                 $raw .= " -i $rule->{iface}";
2585             }
2586
2587             if ($rule->{type} ne  'group')  {
2588                 $raw .= " -source $rule->{source}" if $rule->{source};
2589                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2590                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2591                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2592                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2593             }
2594
2595             $raw .= " # " . encode('utf8', $rule->{comment})
2596                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2597             $raw .= "\n";
2598         } else {
2599             die "unknown rule type '$rule->{type}'";
2600         }
2601     }
2602
2603     return $raw;
2604 };
2605
2606 my $format_options = sub {
2607     my ($options) = @_;
2608
2609     my $raw = '';
2610
2611     $raw .= "[OPTIONS]\n\n";
2612     foreach my $opt (keys %$options) {
2613         $raw .= "$opt: $options->{$opt}\n";
2614     }
2615     $raw .= "\n";
2616
2617     return $raw;
2618 };
2619
2620 my $format_aliases = sub {
2621     my ($aliases) = @_;
2622
2623     my $raw = '';
2624
2625     $raw .= "[ALIASES]\n\n";
2626     foreach my $k (keys %$aliases) {
2627         my $e = $aliases->{$k};
2628         $raw .= "$e->{name} $e->{cidr}";
2629         $raw .= " # " . encode('utf8', $e->{comment})
2630             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2631         $raw .= "\n";
2632     }
2633     $raw .= "\n";
2634
2635     return $raw;
2636 };
2637
2638 my $format_ipsets = sub {
2639     my ($fw_conf) = @_;
2640
2641     my $raw = '';
2642
2643     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2644         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2645             my $utf8comment = encode('utf8', $comment);
2646             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2647         } else {
2648             $raw .= "[IPSET $ipset]\n\n";
2649         }
2650         my $options = $fw_conf->{ipset}->{$ipset};
2651
2652         my $nethash = {};
2653         foreach my $entry (@$options) {
2654             $nethash->{$entry->{cidr}} = $entry;
2655         }
2656
2657         foreach my $cidr (sort keys %$nethash) {
2658             my $entry = $nethash->{$cidr};
2659             my $line = $entry->{nomatch} ? '!' : '';
2660             $line .= $entry->{cidr};
2661             $line .= " # " . encode('utf8', $entry->{comment})
2662                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2663             $raw .= "$line\n";
2664         }
2665
2666         $raw .= "\n";
2667     }
2668
2669     return $raw;
2670 };
2671
2672 sub save_vmfw_conf {
2673     my ($vmid, $vmfw_conf) = @_;
2674
2675     my $raw = '';
2676
2677     my $options = $vmfw_conf->{options};
2678     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2679
2680     my $aliases = $vmfw_conf->{aliases};
2681     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2682
2683     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2684
2685     my $rules = $vmfw_conf->{rules} || [];
2686     if ($rules && scalar(@$rules)) {
2687         $raw .= "[RULES]\n\n";
2688         $raw .= &$format_rules($rules, 1);
2689         $raw .= "\n";
2690     }
2691
2692     mkdir $pvefw_conf_dir;
2693
2694     my $filename = "$pvefw_conf_dir/$vmid.fw";
2695     PVE::Tools::file_set_contents($filename, $raw);
2696 }
2697
2698 sub read_vm_firewall_configs {
2699     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2700
2701     my $vmfw_configs = {};
2702
2703     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2704         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2705         next if !$vmfw_conf->{options}; # skip if file does not exists
2706         $vmfw_configs->{$vmid} = $vmfw_conf;
2707     }
2708     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2709         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2710         next if !$vmfw_conf->{options}; # skip if file does not exists
2711         $vmfw_configs->{$vmid} = $vmfw_conf;
2712     }
2713
2714     return $vmfw_configs;
2715 }
2716
2717 sub get_option_log_level {
2718     my ($options, $k) = @_;
2719
2720     my $v = $options->{$k};
2721     $v = $default_log_level if !defined($v);
2722
2723     return undef if $v eq '' || $v eq 'nolog';
2724
2725     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2726
2727     return $v if ($v >= 0) && ($v <= 7);
2728
2729     warn "unknown log level ($k = '$v')\n";
2730
2731     return undef;
2732 }
2733
2734 sub generate_std_chains {
2735     my ($ruleset, $options, $ipversion) = @_;
2736
2737     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2738
2739     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2740
2741     my $chain;
2742
2743     if ($ipversion == 4) {
2744         # same as shorewall smurflog.
2745         $chain = 'PVEFW-smurflog';
2746         $std_chains->{$chain} = [];
2747
2748         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2749         push @{$std_chains->{$chain}}, "-j DROP";
2750     }
2751
2752     # same as shorewall logflags action.
2753     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2754     $chain = 'PVEFW-logflags';
2755     $std_chains->{$chain} = [];
2756
2757     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2758     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2759     push @{$std_chains->{$chain}}, "-j DROP";
2760
2761     foreach my $chain (keys %$std_chains) {
2762         ruleset_create_chain($ruleset, $chain);
2763         foreach my $rule (@{$std_chains->{$chain}}) {
2764             if (ref($rule)) {
2765                 ruleset_generate_rule($ruleset, $chain, $rule);
2766             } else {
2767                 ruleset_addrule($ruleset, $chain, $rule);
2768             }
2769         }
2770     }
2771 }
2772
2773 sub generate_ipset_chains {
2774     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2775
2776     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2777         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2778         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2779     }
2780 }
2781
2782 sub generate_ipset {
2783     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2784
2785     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2786
2787     $ipset_ruleset->{$name} = ["create $name list:set size 4"];
2788
2789     # remove duplicates
2790     my $nethash = {};
2791     foreach my $entry (@$options) {
2792         next if $entry->{errors}; # skip entries with errors
2793         eval {
2794             my ($cidr, $ipversion);
2795             if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2796                 ($cidr, $ipversion) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2797             } else {
2798                 ($cidr, $ipversion) = parse_ip_or_cidr($entry->{cidr});
2799             }
2800             #http://backreference.org/2013/03/01/ipv6-address-normalization/
2801             if ($ipversion == 6) {
2802                 my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2803                 $cidr = inet_ntop(AF_INET6, $ipv6);
2804                 $cidr =~ s|/128$||;
2805             } else {
2806                 $cidr =~ s|/32$||;
2807             }
2808
2809             $nethash->{$ipversion}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2810         };
2811         warn $@ if $@;
2812     }
2813
2814     foreach my $ipversion (sort keys %$nethash) {
2815         my $data = $nethash->{$ipversion};
2816         my $subname = "$name-v$ipversion";
2817
2818         my $hashsize = scalar(@$options);
2819         if ($hashsize <= 64) {
2820             $hashsize = 64;
2821         } else {
2822             $hashsize = round_powerof2($hashsize);
2823         }
2824
2825         my $family = $ipversion == "6" ? "inet6" : "inet";
2826
2827         $ipset_ruleset->{$subname} = ["create $subname hash:net family $family hashsize $hashsize maxelem $hashsize"];
2828
2829         foreach my $cidr (sort keys %$data) {
2830             my $entry = $data->{$cidr};
2831
2832             my $cmd = "add $subname $cidr";
2833             if ($entry->{nomatch}) {
2834                 if ($feature_ipset_nomatch) {
2835                     push @{$ipset_ruleset->{$subname}}, "$cmd nomatch";
2836                 } else {
2837                     warn "ignore !$cidr - nomatch not supported by kernel\n";
2838                 }
2839             } else {
2840                 push @{$ipset_ruleset->{$subname}}, $cmd;
2841             }
2842         }
2843
2844         push @{$ipset_ruleset->{$name}}, "add $name $subname";
2845     }
2846 }
2847
2848 sub round_powerof2 {
2849     my ($int) = @_;
2850
2851     $int--;
2852     $int |= $int >> $_ foreach (1,2,4,8,16);
2853     return ++$int;
2854 }
2855
2856 sub load_clusterfw_conf {
2857     my ($filename, $verbose) = @_;
2858
2859     $filename = $clusterfw_conf_filename if !defined($filename);
2860
2861     my $cluster_conf = {};
2862     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2863         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2864     }
2865
2866     return $cluster_conf;
2867 }
2868
2869 sub save_clusterfw_conf {
2870     my ($cluster_conf) = @_;
2871
2872     my $raw = '';
2873
2874     my $options = $cluster_conf->{options};
2875     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2876
2877     my $aliases = $cluster_conf->{aliases};
2878     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2879
2880     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2881
2882     my $rules = $cluster_conf->{rules};
2883     if ($rules && scalar(@$rules)) {
2884         $raw .= "[RULES]\n\n";
2885         $raw .= &$format_rules($rules, 1);
2886         $raw .= "\n";
2887     }
2888
2889     if ($cluster_conf->{groups}) {
2890         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2891             my $rules = $cluster_conf->{groups}->{$group};
2892             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2893                 my $utf8comment = encode('utf8', $comment);
2894                 $raw .= "[group $group] # $utf8comment\n\n";
2895             } else {
2896                 $raw .= "[group $group]\n\n";
2897             }
2898
2899             $raw .= &$format_rules($rules, 0);
2900             $raw .= "\n";
2901         }
2902     }
2903
2904     mkdir $pvefw_conf_dir;
2905     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2906 }
2907
2908 sub load_hostfw_conf {
2909     my ($cluster_conf, $filename, $verbose) = @_;
2910
2911     $filename = $hostfw_conf_filename if !defined($filename);
2912
2913     my $hostfw_conf = {};
2914     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2915         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2916     }
2917     return $hostfw_conf;
2918 }
2919
2920 sub save_hostfw_conf {
2921     my ($hostfw_conf) = @_;
2922
2923     my $raw = '';
2924
2925     my $options = $hostfw_conf->{options};
2926     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2927
2928     my $rules = $hostfw_conf->{rules};
2929     if ($rules && scalar(@$rules)) {
2930         $raw .= "[RULES]\n\n";
2931         $raw .= &$format_rules($rules, 1);
2932         $raw .= "\n";
2933     }
2934
2935     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2936 }
2937
2938 sub compile {
2939     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2940
2941     my $vmfw_configs;
2942
2943     if ($vmdata) { # test mode
2944         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2945         my $filename = "$testdir/cluster.fw";
2946         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2947
2948         $filename = "$testdir/host.fw";
2949         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2950
2951         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2952     } else { # normal operation
2953         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2954
2955         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2956
2957         $vmdata = read_local_vm_config();
2958         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2959     }
2960
2961     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
2962     return ($ruleset, $ipset_ruleset);
2963 }
2964
2965 sub compile_iptables_filter {
2966     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
2967
2968     $cluster_conf->{ipset}->{venet0} = [];
2969     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2970
2971     my $localnet;
2972     if ($cluster_conf->{aliases}->{local_network}) {
2973         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2974     } else {
2975         $localnet = local_network() || '127.0.0.0/8';
2976         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2977     }
2978
2979     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2980
2981     return ({}, {}) if !$cluster_conf->{options}->{enable};
2982
2983     my $ruleset = {};
2984
2985     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2986     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2987
2988     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2989
2990     my $hostfw_options = $hostfw_conf->{options} || {};
2991
2992     # fixme: what log level should we use here?
2993     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2994
2995     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2996
2997
2998     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2999     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3000     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3001
3002     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3003     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
3004
3005     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3006
3007     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3008     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3009
3010     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3011     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
3012
3013     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3014
3015     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3016
3017     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3018
3019     my $ipset_ruleset = {};
3020
3021     # currently pveproxy don't works with ipv6, so let's generate host fw ipv4 only for the moment
3022     if ($hostfw_enable && ($ipversion == 4)) {
3023         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3024         warn $@ if $@; # just to be sure - should not happen
3025     }
3026
3027     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3028
3029     # generate firewall rules for QEMU VMs
3030     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3031         eval {
3032             my $conf = $vmdata->{qemu}->{$vmid};
3033             my $vmfw_conf = $vmfw_configs->{$vmid};
3034             return if !$vmfw_conf;
3035
3036             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3037
3038             foreach my $netid (keys %$conf) {
3039                 next if $netid !~ m/^net(\d+)$/;
3040                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3041                 next if !$net->{firewall};
3042                 my $iface = "tap${vmid}i$1";
3043
3044                 my $macaddr = $net->{macaddr};
3045                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3046                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3047                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3048                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3049             }
3050         };
3051         warn $@ if $@; # just to be sure - should not happen
3052     }
3053
3054     # generate firewall rules for OpenVZ containers
3055     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3056         eval {
3057             my $conf = $vmdata->{openvz}->{$vmid};
3058
3059             my $vmfw_conf = $vmfw_configs->{$vmid};
3060             return if !$vmfw_conf;
3061
3062             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3063
3064             if ($vmfw_conf->{options}->{enable}) {
3065                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3066                     my $ip = $conf->{ip_address}->{value};
3067                     $ip =~ s/\s+/,/g;
3068
3069                     my @ips = ();
3070
3071                     foreach my $singleip (split(',', $ip)) {
3072                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3073                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3074                         push @ips, $singleip if $singleip_ver == $ipversion;
3075                     }
3076
3077                     if (scalar(@ips)) {
3078                         my $ip_list = join(',', @ips);
3079                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3080                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3081                     }
3082                 }
3083             }
3084
3085             if ($conf->{netif} && $conf->{netif}->{value}) {
3086                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3087                 foreach my $netid (keys %$netif) {
3088                     my $d = $netif->{$netid};
3089                     my $bridge = $d->{bridge};
3090                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3091                     my $macaddr = $d->{mac};
3092                     my $iface = $d->{host_ifname};
3093                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3094                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3095                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3096                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3097                 }
3098             }
3099         };
3100         warn $@ if $@; # just to be sure - should not happen
3101     }
3102
3103     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3104         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3105     }
3106
3107     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3108
3109     return ($ruleset, $ipset_ruleset);
3110 }
3111
3112 sub get_ruleset_status {
3113     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3114
3115     my $statushash = {};
3116
3117     foreach my $chain (sort keys %$ruleset) {
3118         my $sig = &$digest_fn($ruleset->{$chain});
3119
3120         $statushash->{$chain}->{sig} = $sig;
3121
3122         my $oldsig = $active_chains->{$chain};
3123         if (!defined($oldsig)) {
3124             $statushash->{$chain}->{action} = 'create';
3125         } else {
3126             if ($oldsig eq $sig) {
3127                 $statushash->{$chain}->{action} = 'exists';
3128             } else {
3129                 $statushash->{$chain}->{action} = 'update';
3130             }
3131         }
3132         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3133         foreach my $cmd (@{$ruleset->{$chain}}) {
3134             print "\t$cmd\n" if $verbose;
3135         }
3136     }
3137
3138     foreach my $chain (sort keys %$active_chains) {
3139         if (!defined($ruleset->{$chain})) {
3140             my $sig = $active_chains->{$chain};
3141             $statushash->{$chain}->{action} = 'delete';
3142             $statushash->{$chain}->{sig} = $sig;
3143             print "delete $chain ($sig)\n" if $verbose;
3144         }
3145     }
3146
3147     return $statushash;
3148 }
3149
3150 sub print_sig_rule {
3151     my ($chain, $sig) = @_;
3152
3153     # We just use this to store a SHA1 checksum used to detect changes
3154     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3155 }
3156
3157 sub get_ruleset_cmdlist {
3158     my ($ruleset, $verbose) = @_;
3159
3160     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3161
3162     my ($active_chains, $hooks) = iptables_get_chains();
3163     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3164
3165     # create missing chains first
3166     foreach my $chain (sort keys %$ruleset) {
3167         my $stat = $statushash->{$chain};
3168         die "internal error" if !$stat;
3169         next if $stat->{action} ne 'create';
3170
3171         $cmdlist .= ":$chain - [0:0]\n";
3172     }
3173
3174     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3175         my $chain = "PVEFW-$h";
3176         if ($ruleset->{$chain} && !$hooks->{$h}) {
3177             $cmdlist .= "-A $h -j $chain\n";
3178         }
3179     }
3180
3181     foreach my $chain (sort keys %$ruleset) {
3182         my $stat = $statushash->{$chain};
3183         die "internal error" if !$stat;
3184
3185         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3186             $cmdlist .= "-F $chain\n";
3187             foreach my $cmd (@{$ruleset->{$chain}}) {
3188                 $cmdlist .= "$cmd\n";
3189             }
3190             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3191         } elsif ($stat->{action} eq 'delete') {
3192             die "internal error"; # this should not happen
3193         } elsif ($stat->{action} eq 'exists') {
3194             # do nothing
3195         } else {
3196             die "internal error - unknown status '$stat->{action}'";
3197         }
3198     }
3199
3200     foreach my $chain (keys %$statushash) {
3201         next if $statushash->{$chain}->{action} ne 'delete';
3202         $cmdlist .= "-F $chain\n";
3203     }
3204     foreach my $chain (keys %$statushash) {
3205         next if $statushash->{$chain}->{action} ne 'delete';
3206         next if $chain eq 'PVEFW-INPUT';
3207         next if $chain eq 'PVEFW-OUTPUT';
3208         next if $chain eq 'PVEFW-FORWARD';
3209         $cmdlist .= "-X $chain\n";
3210     }
3211
3212     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3213
3214     $cmdlist .= "COMMIT\n";
3215
3216     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3217 }
3218
3219 sub get_ipset_cmdlist {
3220     my ($ruleset, $verbose) = @_;
3221
3222     my $cmdlist = "";
3223
3224     my $delete_cmdlist = "";
3225
3226     my $active_chains = ipset_get_chains();
3227     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3228
3229     # remove stale _swap chains
3230     foreach my $chain (keys %$active_chains) {
3231         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3232             $cmdlist .= "destroy $chain\n";
3233         }
3234     }
3235
3236     foreach my $chain (sort keys %$ruleset) {
3237         my $stat = $statushash->{$chain};
3238         die "internal error" if !$stat;
3239
3240         if ($stat->{action} eq 'create') {
3241             foreach my $cmd (@{$ruleset->{$chain}}) {
3242                 $cmdlist .= "$cmd\n";
3243             }
3244         }
3245     }
3246
3247     foreach my $chain (sort keys %$ruleset) {
3248         my $stat = $statushash->{$chain};
3249         die "internal error" if !$stat;
3250
3251         if ($stat->{action} eq 'update') {
3252             my $chain_swap = $chain."_swap";
3253
3254             foreach my $cmd (@{$ruleset->{$chain}}) {
3255                 $cmd =~ s/$chain/$chain_swap/;
3256                 $cmdlist .= "$cmd\n";
3257             }
3258             $cmdlist .= "swap $chain_swap $chain\n";
3259             $cmdlist .= "flush $chain_swap\n";
3260             $cmdlist .= "destroy $chain_swap\n";
3261         }
3262     }
3263
3264     foreach my $chain (sort keys %$statushash) {
3265         next if $statushash->{$chain}->{action} ne 'delete';
3266
3267         $delete_cmdlist .= "flush $chain\n";
3268         $delete_cmdlist .= "destroy $chain\n";
3269     }
3270
3271     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3272
3273     return ($cmdlist, $delete_cmdlist, $changes);
3274 }
3275
3276 sub apply_ruleset {
3277     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3278
3279     enable_bridge_firewall();
3280
3281     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3282         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3283
3284     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3285
3286     if ($verbose) {
3287         if ($ipset_changes) {
3288             print "ipset changes:\n";
3289             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3290             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3291         }
3292
3293         if ($changes) {
3294             print "iptables changes:\n";
3295             print $cmdlist;
3296         }
3297     }
3298
3299     ipset_restore_cmdlist($ipset_create_cmdlist);
3300
3301     iptables_restore_cmdlist($cmdlist);
3302
3303     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3304
3305     # test: re-read status and check if everything is up to date
3306     my $active_chains = iptables_get_chains();
3307     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3308
3309     my $errors;
3310     foreach my $chain (sort keys %$ruleset) {
3311         my $stat = $statushash->{$chain};
3312         if ($stat->{action} ne 'exists') {
3313             warn "unable to update chain '$chain'\n";
3314             $errors = 1;
3315         }
3316     }
3317
3318     die "unable to apply firewall changes\n" if $errors;
3319
3320     update_nf_conntrack_max($hostfw_conf);
3321
3322     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3323
3324 }
3325
3326 sub update_nf_conntrack_max {
3327     my ($hostfw_conf) = @_;
3328
3329     my $max = 65536; # reasonable default
3330
3331     my $options = $hostfw_conf->{options} || {};
3332
3333     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3334         $max = $options->{nf_conntrack_max};
3335         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3336     }
3337
3338     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3339     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3340
3341     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3342
3343     if ($current != $max) {
3344         my $hashsize = int($max/4);
3345         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3346         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3347     }
3348 }
3349
3350 sub update_nf_conntrack_tcp_timeout_established {
3351     my ($hostfw_conf) = @_;
3352
3353     my $options = $hostfw_conf->{options} || {};
3354
3355     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3356
3357     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3358 }
3359
3360 sub remove_pvefw_chains {
3361
3362     my ($chash, $hooks) = iptables_get_chains();
3363     my $cmdlist = "*filter\n";
3364
3365     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3366         if ($hooks->{$h}) {
3367             $cmdlist .= "-D $h -j PVEFW-$h\n";
3368         }
3369     }
3370
3371     foreach my $chain (keys %$chash) {
3372         $cmdlist .= "-F $chain\n";
3373     }
3374
3375     foreach my $chain (keys %$chash) {
3376         $cmdlist .= "-X $chain\n";
3377     }
3378     $cmdlist .= "COMMIT\n";
3379
3380     iptables_restore_cmdlist($cmdlist);
3381
3382     my $ipset_chains = ipset_get_chains();
3383
3384     $cmdlist = "";
3385
3386     foreach my $chain (keys %$ipset_chains) {
3387        $cmdlist .= "flush $chain\n";
3388        $cmdlist .= "destroy $chain\n";
3389     }
3390
3391     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3392 }
3393
3394 sub init {
3395     my $cluster_conf = load_clusterfw_conf();
3396     my $cluster_options = $cluster_conf->{options};
3397     my $enable = $cluster_options->{enable};
3398
3399     return if !$enable;
3400
3401     # load required modules here
3402 }
3403
3404 sub update {
3405     my $code = sub {
3406
3407         my $cluster_conf = load_clusterfw_conf();
3408         my $cluster_options = $cluster_conf->{options};
3409
3410         if (!$cluster_options->{enable}) {
3411             PVE::Firewall::remove_pvefw_chains();
3412             return;
3413         }
3414
3415         my $hostfw_conf = load_hostfw_conf();
3416
3417         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3418
3419         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3420     };
3421
3422     run_locked($code);
3423 }
3424
3425 1;