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 $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # imported/converted from: /usr/share/shorewall/macro.*
 136 my $pve_fw_macros = {
 137     'Amanda' => [
 138         "Amanda Backup",
 139         { action => 'PARAM', proto => 'udp', dport => '10080' },
 140         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 141     ],
 142     'Auth' => [
 143         "Auth (identd) traffic",
 144         { action => 'PARAM', proto => 'tcp', dport => '113' },
 145     ],
 146     'BGP' => [
 147         "Border Gateway Protocol traffic",
 148         { action => 'PARAM', proto => 'tcp', dport => '179' },
 149     ],
 150     'BitTorrent' => [
 151         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 152         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 153         { action => 'PARAM', proto => 'udp', dport => '6881' },
 154     ],
 155     'BitTorrent32' => [
 156         "BitTorrent traffic for BitTorrent 3.2 and later",
 157         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 158         { action => 'PARAM', proto => 'udp', dport => '6881' },
 159     ],
 160     'CVS' => [
 161         "Concurrent Versions System pserver traffic",
 162         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 163     ],
 164     'Citrix' => [
 165         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 166         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 167         { action => 'PARAM', proto => 'udp', dport => '1604' },
 168         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 169     ],
 170     'DAAP' => [
 171         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 172         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 173         { action => 'PARAM', proto => 'udp', dport => '3689' },
 174     ],
 175     'DCC' => [
 176         "Distributed Checksum Clearinghouse spam filtering mechanism",
 177         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 178     ],
 179     'DHCPfwd' => [
 180         "Forwarded DHCP traffic",
 181         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 182     ],
 183     'DNS' => [
 184         "Domain Name System traffic (upd and tcp)",
 185         { action => 'PARAM', proto => 'udp', dport => '53' },
 186         { action => 'PARAM', proto => 'tcp', dport => '53' },
 187     ],
 188     'Distcc' => [
 189         "Distributed Compiler service",
 190         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 191     ],
 192     'FTP' => [
 193         "File Transfer Protocol",
 194         { action => 'PARAM', proto => 'tcp', dport => '21' },
 195     ],
 196     'Finger' => [
 197         "Finger protocol (RFC 742)",
 198         { action => 'PARAM', proto => 'tcp', dport => '79' },
 199     ],
 200     'GNUnet' => [
 201         "GNUnet secure peer-to-peer networking traffic",
 202         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 203         { action => 'PARAM', proto => 'udp', dport => '2086' },
 204         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 205         { action => 'PARAM', proto => 'udp', dport => '1080' },
 206     ],
 207     'GRE' => [
 208         "Generic Routing Encapsulation tunneling protocol",
 209         { action => 'PARAM', proto => '47' },
 210     ],
 211     'Git' => [
 212         "Git distributed revision control traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 214     ],
 215     'HKP' => [
 216         "OpenPGP HTTP keyserver protocol traffic",
 217         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 218     ],
 219     'HTTP' => [
 220         "Hypertext Transfer Protocol (WWW)",
 221         { action => 'PARAM', proto => 'tcp', dport => '80' },
 222     ],
 223     'HTTPS' => [
 224         "Hypertext Transfer Protocol (WWW) over SSL",
 225         { action => 'PARAM', proto => 'tcp', dport => '443' },
 226     ],
 227     'ICPV2' => [
 228         "Internet Cache Protocol V2 (Squid) traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '3130' },
 230     ],
 231     'ICQ' => [
 232         "AOL Instant Messenger traffic",
 233         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 234     ],
 235     'IMAP' => [
 236         "Internet Message Access Protocol",
 237         { action => 'PARAM', proto => 'tcp', dport => '143' },
 238     ],
 239     'IMAPS' => [
 240         "Internet Message Access Protocol over SSL",
 241         { action => 'PARAM', proto => 'tcp', dport => '993' },
 242     ],
 243     'IPIP' => [
 244         "IPIP capsulation traffic",
 245         { action => 'PARAM', proto => '94' },
 246     ],
 247     'IPsec' => [
 248         "IPsec traffic",
 249         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 250         { action => 'PARAM', proto => '50' },
 251     ],
 252     'IPsecah' => [
 253         "IPsec authentication (AH) traffic",
 254         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 255         { action => 'PARAM', proto => '51' },
 256     ],
 257     'IPsecnat' => [
 258         "IPsec traffic and Nat-Traversal",
 259         { action => 'PARAM', proto => 'udp', dport => '500' },
 260         { action => 'PARAM', proto => 'udp', dport => '4500' },
 261         { action => 'PARAM', proto => '50' },
 262     ],
 263     'IRC' => [
 264         "Internet Relay Chat traffic",
 265         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 266     ],
 267     'Jetdirect' => [
 268         "HP Jetdirect printing",
 269         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 270     ],
 271     'L2TP' => [
 272         "Layer 2 Tunneling Protocol traffic",
 273         { action => 'PARAM', proto => 'udp', dport => '1701' },
 274     ],
 275     'LDAP' => [
 276         "Lightweight Directory Access Protocol traffic",
 277         { action => 'PARAM', proto => 'tcp', dport => '389' },
 278     ],
 279     'LDAPS' => [
 280         "Secure Lightweight Directory Access Protocol traffic",
 281         { action => 'PARAM', proto => 'tcp', dport => '636' },
 282     ],
 283     'MSNP' => [
 284         "Microsoft Notification Protocol",
 285         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 286     ],
 287     'MSSQL' => [
 288         "Microsoft SQL Server",
 289         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 290     ],
 291     'Mail' => [
 292         "Mail traffic (SMTP, SMTPS, Submission)",
 293         { action => 'PARAM', proto => 'tcp', dport => '25' },
 294         { action => 'PARAM', proto => 'tcp', dport => '465' },
 295         { action => 'PARAM', proto => 'tcp', dport => '587' },
 296     ],
 297     'Munin' => [
 298         "Munin networked resource monitoring traffic",
 299         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 300     ],
 301     'MySQL' => [
 302         "MySQL server",
 303         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 304     ],
 305     'NNTP' => [
 306         "NNTP traffic (Usenet).",
 307         { action => 'PARAM', proto => 'tcp', dport => '119' },
 308     ],
 309     'NNTPS' => [
 310         "Encrypted NNTP traffic (Usenet)",
 311         { action => 'PARAM', proto => 'tcp', dport => '563' },
 312     ],
 313     'NTP' => [
 314         "Network Time Protocol (ntpd)",
 315         { action => 'PARAM', proto => 'udp', dport => '123' },
 316     ],
 317     'OSPF' => [
 318         "OSPF multicast traffic",
 319         { action => 'PARAM', proto => '89' },
 320     ],
 321     'OpenVPN' => [
 322         "OpenVPN traffic",
 323         { action => 'PARAM', proto => 'udp', dport => '1194' },
 324     ],
 325     'PCA' => [
 326         "Symantec PCAnywere (tm)",
 327         { action => 'PARAM', proto => 'udp', dport => '5632' },
 328         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 329     ],
 330     'POP3' => [
 331         "POP3 traffic",
 332         { action => 'PARAM', proto => 'tcp', dport => '110' },
 333     ],
 334     'POP3S' => [
 335         "Encrypted POP3 traffic",
 336         { action => 'PARAM', proto => 'tcp', dport => '995' },
 337     ],
 338     'PPtP' => [
 339         "Point-to-Point Tunneling Protocol",
 340         { action => 'PARAM', proto => '47' },
 341         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 342     ],
 343     'Ping' => [
 344         "ICMP echo request",
 345         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 346     ],
 347     'PostgreSQL' => [
 348         "PostgreSQL server",
 349         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 350     ],
 351     'Printer' => [
 352         "Line Printer protocol printing",
 353         { action => 'PARAM', proto => 'tcp', dport => '515' },
 354     ],
 355     'RDP' => [
 356         "Microsoft Remote Desktop Protocol traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 358     ],
 359     'RIP' => [
 360         "Routing Information Protocol (bidirectional)",
 361         { action => 'PARAM', proto => 'udp', dport => '520' },
 362     ],
 363     'RNDC' => [
 364         "BIND remote management protocol",
 365         { action => 'PARAM', proto => 'tcp', dport => '953' },
 366     ],
 367     'Razor' => [
 368         "Razor Antispam System",
 369         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 370     ],
 371     'Rdate' => [
 372         "Remote time retrieval (rdate)",
 373         { action => 'PARAM', proto => 'tcp', dport => '37' },
 374     ],
 375     'Rsync' => [
 376         "Rsync server",
 377         { action => 'PARAM', proto => 'tcp', dport => '873' },
 378     ],
 379     'SANE' => [
 380         "SANE network scanning",
 381         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 382     ],
 383     'SMB' => [
 384         "Microsoft SMB traffic",
 385         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 386         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 387         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 388         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 389     ],
 390     'SMBswat' => [
 391         "Samba Web Administration Tool",
 392         { action => 'PARAM', proto => 'tcp', dport => '901' },
 393     ],
 394     'SMTP' => [
 395         "Simple Mail Transfer Protocol",
 396         { action => 'PARAM', proto => 'tcp', dport => '25' },
 397     ],
 398     'SMTPS' => [
 399         "Encrypted Simple Mail Transfer Protocol",
 400         { action => 'PARAM', proto => 'tcp', dport => '465' },
 401     ],
 402     'SNMP' => [
 403         "Simple Network Management Protocol",
 404         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 405         { action => 'PARAM', proto => 'tcp', dport => '161' },
 406     ],
 407     'SPAMD' => [
 408         "Spam Assassin SPAMD traffic",
 409         { action => 'PARAM', proto => 'tcp', dport => '783' },
 410     ],
 411     'SSH' => [
 412         "Secure shell traffic",
 413         { action => 'PARAM', proto => 'tcp', dport => '22' },
 414     ],
 415     'SVN' => [
 416         "Subversion server (svnserve)",
 417         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 418     ],
 419     'SixXS' => [
 420         "SixXS IPv6 Deployment and Tunnel Broker",
 421         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 422         { action => 'PARAM', proto => 'udp', dport => '3740' },
 423         { action => 'PARAM', proto => '41' },
 424         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 425     ],
 426     'Squid' => [
 427         "Squid web proxy traffic",
 428         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 429     ],
 430     'Submission' => [
 431         "Mail message submission traffic",
 432         { action => 'PARAM', proto => 'tcp', dport => '587' },
 433     ],
 434     'Syslog' => [
 435         "Syslog protocol (RFC 5424) traffic",
 436         { action => 'PARAM', proto => 'udp', dport => '514' },
 437         { action => 'PARAM', proto => 'tcp', dport => '514' },
 438     ],
 439     'TFTP' => [
 440         "Trivial File Transfer Protocol traffic",
 441         { action => 'PARAM', proto => 'udp', dport => '69' },
 442     ],
 443     'Telnet' => [
 444         "Telnet traffic",
 445         { action => 'PARAM', proto => 'tcp', dport => '23' },
 446     ],
 447     'Telnets' => [
 448         "Telnet over SSL",
 449         { action => 'PARAM', proto => 'tcp', dport => '992' },
 450     ],
 451     'Time' => [
 452         "RFC 868 Time protocol",
 453         { action => 'PARAM', proto => 'tcp', dport => '37' },
 454     ],
 455     'Trcrt' => [
 456         "Traceroute (for up to 30 hops) traffic",
 457         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 458         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 459     ],
 460     'VNC' => [
 461         "VNC traffic for VNC display's 0 - 99",
 462         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 463     ],
 464     'VNCL' => [
 465         "VNC traffic from Vncservers to Vncviewers in listen mode",
 466         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 467     ],
 468     'Web' => [
 469         "WWW traffic (HTTP and HTTPS)",
 470         { action => 'PARAM', proto => 'tcp', dport => '80' },
 471         { action => 'PARAM', proto => 'tcp', dport => '443' },
 472     ],
 473     'Webcache' => [
 474         "Web Cache/Proxy traffic (port 8080)",
 475         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 476     ],
 477     'Webmin' => [
 478         "Webmin traffic",
 479         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 480     ],
 481     'Whois' => [
 482         "Whois (nicname, RFC 3912) traffic",
 483         { action => 'PARAM', proto => 'tcp', dport => '43' },
 484     ],
 485 };
 486
 487 my $pve_fw_parsed_macros;
 488 my $pve_fw_macro_descr;
 489 my $pve_fw_preferred_macro_names = {};
 490
 491 my $pve_std_chains = {};
 492 $pve_std_chains->{4} = {
 493     'PVEFW-SET-ACCEPT-MARK' => [
 494         "-j MARK --set-mark 1",
 495     ],
 496     'PVEFW-DropBroadcast' => [
 497         # same as shorewall 'Broadcast'
 498         # simply DROP BROADCAST/MULTICAST/ANYCAST
 499         # we can use this to reduce logging
 500         { action => 'DROP', dsttype => 'BROADCAST' },
 501         { action => 'DROP', dsttype => 'MULTICAST' },
 502         { action => 'DROP', dsttype => 'ANYCAST' },
 503         { action => 'DROP', dest => '224.0.0.0/4' },
 504     ],
 505     'PVEFW-reject' => [
 506         # same as shorewall 'reject'
 507         { action => 'DROP', dsttype => 'BROADCAST' },
 508         { action => 'DROP', source => '224.0.0.0/4' },
 509         { action => 'DROP', proto => 'icmp' },
 510         "-p tcp -j REJECT --reject-with tcp-reset",
 511         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 512         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 513         "-j REJECT --reject-with icmp-host-prohibited",
 514     ],
 515     'PVEFW-Drop' => [
 516         # same as shorewall 'Drop', which is equal to DROP,
 517         # but REJECT/DROP some packages to reduce logging,
 518         # and ACCEPT critical ICMP types
 519         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 520         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 521         { action => 'PVEFW-DropBroadcast' },
 522         # ACCEPT critical ICMP types
 523         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 525         # Drop packets with INVALID state
 526         "-m conntrack --ctstate INVALID -j DROP",
 527         # Drop Microsoft SMB noise
 528         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 529         { action => 'DROP', proto => 'udp', dport => '137:139'},
 530         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 531         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 532         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 533         # Drop new/NotSyn traffic so that it doesn't get logged
 534         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 535         # Drop DNS replies
 536         { action => 'DROP', proto => 'udp', sport => 53 },
 537     ],
 538     'PVEFW-Reject' => [
 539         # same as shorewall 'Reject', which is equal to Reject,
 540         # but REJECT/DROP some packages to reduce logging,
 541         # and ACCEPT critical ICMP types
 542         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 543         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 544         { action => 'PVEFW-DropBroadcast' },
 545         # ACCEPT critical ICMP types
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 548         # Drop packets with INVALID state
 549         "-m conntrack --ctstate INVALID -j DROP",
 550         # Drop Microsoft SMB noise
 551         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 554         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 555         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 556         # Drop new/NotSyn traffic so that it doesn't get logged
 557         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 558         # Drop DNS replies
 559         { action => 'DROP', proto => 'udp', sport => 53 },
 560     ],
 561     'PVEFW-tcpflags' => [
 562         # same as shorewall tcpflags action.
 563         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 564         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 568         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 569     ],
 570     'PVEFW-smurfs' => [
 571         # same as shorewall smurfs action
 572         # Filter packets for smurfs (packets with a broadcast address as the source).
 573         "-s 0.0.0.0/32 -j RETURN",
 574         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 575         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 576     ],
 577 };
 578
 579 $pve_std_chains->{6} = {
 580     'PVEFW-SET-ACCEPT-MARK' => [
 581         "-j MARK --set-mark 1",
 582     ],
 583     'PVEFW-DropBroadcast' => [
 584         # same as shorewall 'Broadcast'
 585         # simply DROP BROADCAST/MULTICAST/ANYCAST
 586         # we can use this to reduce logging
 587         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 588         # ipv6 addrtype does not work with kernel 2.6.32
 589         #{ action => 'DROP', dsttype => 'MULTICAST' },
 590         #{ action => 'DROP', dsttype => 'ANYCAST' },
 591         { action => 'DROP', dest => 'ff00::/8' },
 592         #{ action => 'DROP', dest => '224.0.0.0/4' },
 593     ],
 594     'PVEFW-reject' => [
 595         # same as shorewall 'reject'
 596         #{ action => 'DROP', dsttype => 'BROADCAST' },
 597         #{ action => 'DROP', source => '224.0.0.0/4' },
 598         { action => 'DROP', proto => 'icmpv6' },
 599         "-p tcp -j REJECT --reject-with tcp-reset",
 600         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 601         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 602         #"-j REJECT --reject-with icmp-host-prohibited",
 603     ],
 604     'PVEFW-Drop' => [
 605         # same as shorewall 'Drop', which is equal to DROP,
 606         # but REJECT/DROP some packages to reduce logging,
 607         # and ACCEPT critical ICMP types
 608         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 609         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 610         { action => 'PVEFW-DropBroadcast' },
 611         # ACCEPT critical ICMP types
 612         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 613         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 614         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 615
 616         # Drop packets with INVALID state
 617         "-m conntrack --ctstate INVALID -j DROP",
 618         # Drop Microsoft SMB noise
 619         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 620         { action => 'DROP', proto => 'udp', dport => '137:139'},
 621         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 622         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 623         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 624         # Drop new/NotSyn traffic so that it doesn't get logged
 625         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 626         # Drop DNS replies
 627         { action => 'DROP', proto => 'udp', sport => 53 },
 628     ],
 629     'PVEFW-Reject' => [
 630         # same as shorewall 'Reject', which is equal to Reject,
 631         # but REJECT/DROP some packages to reduce logging,
 632         # and ACCEPT critical ICMP types
 633         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 634         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 635         { action => 'PVEFW-DropBroadcast' },
 636         # ACCEPT critical ICMP types
 637         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 638         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 639         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 640
 641         # Drop packets with INVALID state
 642         "-m conntrack --ctstate INVALID -j DROP",
 643         # Drop Microsoft SMB noise
 644         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 645         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 646         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 647         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 648         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 649         # Drop new/NotSyn traffic so that it doesn't get logged
 650         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 651         # Drop DNS replies
 652         { action => 'DROP', proto => 'udp', sport => 53 },
 653     ],
 654     'PVEFW-tcpflags' => [
 655         # same as shorewall tcpflags action.
 656         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 657         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 658         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 659         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 660         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 661         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 662     ],
 663 };
 664
 665 # iptables -p icmp -h
 666 my $icmp_type_names = {
 667     any => 1,
 668     'echo-reply' => 1,
 669     'destination-unreachable' => 1,
 670     'network-unreachable' => 1,
 671     'host-unreachable' => 1,
 672     'protocol-unreachable' => 1,
 673     'port-unreachable' => 1,
 674     'fragmentation-needed' => 1,
 675     'source-route-failed' => 1,
 676     'network-unknown' => 1,
 677     'host-unknown' => 1,
 678     'network-prohibited' => 1,
 679     'host-prohibited' => 1,
 680     'TOS-network-unreachable' => 1,
 681     'TOS-host-unreachable' => 1,
 682     'communication-prohibited' => 1,
 683     'host-precedence-violation' => 1,
 684     'precedence-cutoff' => 1,
 685     'source-quench' => 1,
 686     'redirect' => 1,
 687     'network-redirect' => 1,
 688     'host-redirect' => 1,
 689     'TOS-network-redirect' => 1,
 690     'TOS-host-redirect' => 1,
 691     'echo-request' => 1,
 692     'router-advertisement' => 1,
 693     'router-solicitation' => 1,
 694     'time-exceeded' => 1,
 695     'ttl-zero-during-transit' => 1,
 696     'ttl-zero-during-reassembly' => 1,
 697     'parameter-problem' => 1,
 698     'ip-header-bad' => 1,
 699     'required-option-missing' => 1,
 700     'timestamp-request' => 1,
 701     'timestamp-reply' => 1,
 702     'address-mask-request' => 1,
 703     'address-mask-reply' => 1,
 704 };
 705
 706 # ip6tables -p icmpv6 -h
 707
 708 my $icmpv6_type_names = {
 709     'any' => 1,
 710     'destination-unreachable' => 1,
 711     'no-route' => 1,
 712     'communication-prohibited' => 1,
 713     'address-unreachable' => 1,
 714     'port-unreachable' => 1,
 715     'packet-too-big' => 1,
 716     'time-exceeded' => 1,
 717     'ttl-zero-during-transit' => 1,
 718     'ttl-zero-during-reassembly' => 1,
 719     'parameter-problem' => 1,
 720     'bad-header' => 1,
 721     'unknown-header-type' => 1,
 722     'unknown-option' => 1,
 723     'echo-request' => 1,
 724     'echo-reply' => 1,
 725     'router-solicitation' => 1,
 726     'router-advertisement' => 1,
 727     'neighbour-solicitation' => 1,
 728     'neighbour-advertisement' => 1,
 729     'redirect' => 1,
 730 };
 731
 732 sub init_firewall_macros {
 733
 734     $pve_fw_parsed_macros = {};
 735
 736     foreach my $k (keys %$pve_fw_macros) {
 737         my $lc_name = lc($k);
 738         my $macro = $pve_fw_macros->{$k};
 739         if (!ref($macro->[0])) {
 740             $pve_fw_macro_descr->{$k} = shift @$macro;
 741         }
 742         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 743         $pve_fw_parsed_macros->{$k} = $macro;
 744     }
 745 }
 746
 747 init_firewall_macros();
 748
 749 sub get_macros {
 750     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 751 }
 752
 753 my $etc_services;
 754
 755 sub get_etc_services {
 756
 757     return $etc_services if $etc_services;
 758
 759     my $filename = "/etc/services";
 760
 761     my $fh = IO::File->new($filename, O_RDONLY);
 762     if (!$fh) {
 763         warn "unable to read '$filename' - $!\n";
 764         return {};
 765     }
 766
 767     my $services = {};
 768
 769     while (my $line = <$fh>) {
 770         chomp ($line);
 771         next if $line =~m/^#/;
 772         next if ($line =~m/^\s*$/);
 773
 774         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 775             $services->{byid}->{$2}->{name} = $1;
 776             $services->{byid}->{$2}->{port} = $2;
 777             $services->{byid}->{$2}->{$3} = 1;
 778             $services->{byname}->{$1} = $services->{byid}->{$2};
 779         }
 780     }
 781
 782     close($fh);
 783
 784     $etc_services = $services;
 785
 786
 787     return $etc_services;
 788 }
 789
 790 my $etc_protocols;
 791
 792 sub get_etc_protocols {
 793     return $etc_protocols if $etc_protocols;
 794
 795     my $filename = "/etc/protocols";
 796
 797     my $fh = IO::File->new($filename, O_RDONLY);
 798     if (!$fh) {
 799         warn "unable to read '$filename' - $!\n";
 800         return {};
 801     }
 802
 803     my $protocols = {};
 804
 805     while (my $line = <$fh>) {
 806         chomp ($line);
 807         next if $line =~m/^#/;
 808         next if ($line =~m/^\s*$/);
 809
 810         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 811             $protocols->{byid}->{$2}->{name} = $1;
 812             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 813         }
 814     }
 815
 816     close($fh);
 817
 818     # add special case for ICMP v6
 819     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 820     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 821
 822     $etc_protocols = $protocols;
 823
 824     return $etc_protocols;
 825 }
 826
 827 my $ipv4_mask_hash_localnet = {
 828     '255.255.0.0' => 16,
 829     '255.255.128.0' => 17,
 830     '255.255.192.0' => 18,
 831     '255.255.224.0' => 19,
 832     '255.255.240.0' => 20,
 833     '255.255.248.0' => 21,
 834     '255.255.252.0' => 22,
 835     '255.255.254.0' => 23,
 836     '255.255.255.0' => 24,
 837     '255.255.255.128' => 25,
 838     '255.255.255.192' => 26,
 839     '255.255.255.224' => 27,
 840     '255.255.255.240' => 28,
 841     '255.255.255.248' => 29,
 842     '255.255.255.252' => 30,
 843 };
 844
 845 my $__local_network;
 846
 847 sub local_network {
 848     my ($new_value) = @_;
 849
 850     $__local_network = $new_value if defined($new_value);
 851
 852     return $__local_network if defined($__local_network);
 853
 854     eval {
 855         my $nodename = PVE::INotify::nodename();
 856
 857         my $ip = PVE::Cluster::remote_node_ip($nodename);
 858
 859         my $testip = Net::IP->new($ip);
 860
 861         my $routes = PVE::ProcFSTools::read_proc_net_route();
 862         foreach my $entry (@$routes) {
 863             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 864             next if !defined($mask);
 865             return if $mask eq '0.0.0.0';
 866             my $cidr = "$entry->{dest}/$mask";
 867             my $testnet = Net::IP->new($cidr);
 868             if ($testnet->overlaps($testip)) {
 869                 $__local_network = $cidr;
 870                 return;
 871             }
 872         }
 873     };
 874     warn $@ if $@;
 875
 876     return $__local_network;
 877 }
 878
 879 # ipset names are limited to 31 characters,
 880 # and we use '-v4' or '-v6' to indicate IP versions,
 881 # and we use '_swap' suffix for atomic update,
 882 # for example PVEFW-${VMID}-${ipset_name}_swap
 883
 884 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 885
 886 sub compute_ipset_chain_name {
 887     my ($vmid, $ipset_name, $ipversion) = @_;
 888
 889     $vmid = 0 if !defined($vmid);
 890
 891     my $id = "$vmid-${ipset_name}-v$ipversion";
 892
 893     if (length($id) > $max_iptables_ipset_name_length) {
 894         $id = PVE::Tools::fnv31a_hex($id);
 895     }
 896
 897     return "PVEFW-$id";
 898 }
 899
 900 sub compute_ipfilter_ipset_name {
 901     my ($iface) = @_;
 902
 903     return "ipfilter-$iface";
 904 }
 905
 906 sub parse_address_list {
 907     my ($str) = @_;
 908
 909     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 910         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 911         return;
 912     }
 913
 914     if ($str =~ m/^${ip_alias_pattern}$/) {
 915         die "alias name too long\n" if length($str) > $max_alias_name_length;
 916         return;
 917     }
 918
 919     my $count = 0;
 920     my $iprange = 0;
 921     my $ipversion;
 922
 923     foreach my $elem (split(/,/, $str)) {
 924         $count++;
 925         my $ip = Net::IP->new($elem);
 926         if (!$ip) {
 927             my $err = Net::IP::Error();
 928             die "invalid IP address: $err\n";
 929         }
 930         $iprange = 1 if $elem =~ m/-/;
 931
 932         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 933
 934         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 935             if $ipversion && ($new_ipversion != $ipversion);
 936
 937         $ipversion = $new_ipversion;
 938     }
 939
 940     die "you can't use a range in a list\n" if $iprange && $count > 1;
 941
 942     return $ipversion;
 943 }
 944
 945 sub parse_port_name_number_or_range {
 946     my ($str) = @_;
 947
 948     my $services = PVE::Firewall::get_etc_services();
 949     my $count = 0;
 950     my $icmp_port = 0;
 951
 952     foreach my $item (split(/,/, $str)) {
 953         $count++;
 954         if ($item =~ m/^(\d+):(\d+)$/) {
 955             my ($port1, $port2) = ($1, $2);
 956             die "invalid port '$port1'\n" if $port1 > 65535;
 957             die "invalid port '$port2'\n" if $port2 > 65535;
 958         } elsif ($item =~ m/^(\d+)$/) {
 959             my $port = $1;
 960             die "invalid port '$port'\n" if $port > 65535;
 961         } else {
 962             if ($icmp_type_names->{$item}) {
 963                 $icmp_port = 1;
 964             } elsif ($icmpv6_type_names->{$item}) {
 965                 $icmp_port = 1;
 966             } else {
 967                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 968             }
 969         }
 970     }
 971
 972     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 973
 974     return $count;
 975 }
 976
 977 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 978 sub pve_fw_verify_port_spec {
 979    my ($portstr) = @_;
 980
 981    parse_port_name_number_or_range($portstr);
 982
 983    return $portstr;
 984 }
 985
 986 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 987 sub pve_fw_verify_addr_spec {
 988    my ($list) = @_;
 989
 990    parse_address_list($list);
 991
 992    return $list;
 993 }
 994
 995 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 996 sub pve_fw_verify_protocol_spec {
 997    my ($proto) = @_;
 998
 999    my $protocols = get_etc_protocols();
1000
1001    die "unknown protocol '$proto'\n" if $proto &&
1002        !(defined($protocols->{byname}->{$proto}) ||
1003          defined($protocols->{byid}->{$proto}));
1004
1005    return $proto;
1006 }
1007
1008
1009 # helper function for API
1010
1011 sub copy_opject_with_digest {
1012     my ($object) = @_;
1013
1014     my $sha = Digest::SHA->new('sha1');
1015
1016     my $res = {};
1017     foreach my $k (sort keys %$object) {
1018         my $v = $object->{$k};
1019         next if !defined($v);
1020         $res->{$k} = $v;
1021         $sha->add($k, ':', $v, "\n");
1022     }
1023
1024     my $digest = $sha->hexdigest;
1025
1026     $res->{digest} = $digest;
1027
1028     return wantarray ? ($res, $digest) : $res;
1029 }
1030
1031 sub copy_list_with_digest {
1032     my ($list) = @_;
1033
1034     my $sha = Digest::SHA->new('sha1');
1035
1036     my $res = [];
1037     foreach my $entry (@$list) {
1038         my $data = {};
1039         foreach my $k (sort keys %$entry) {
1040             my $v = $entry->{$k};
1041             next if !defined($v);
1042             $data->{$k} = $v;
1043             # Note: digest ignores refs ($rule->{errors})
1044             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1045         }
1046         push @$res, $data;
1047     }
1048
1049     my $digest = $sha->hexdigest;
1050
1051     foreach my $entry (@$res) {
1052         $entry->{digest} = $digest;
1053     }
1054
1055     return wantarray ? ($res, $digest) : $res;
1056 }
1057
1058 my $rule_properties = {
1059     pos => {
1060         description => "Update rule at position <pos>.",
1061         type => 'integer',
1062         minimum => 0,
1063         optional => 1,
1064     },
1065     digest => get_standard_option('pve-config-digest'),
1066     type => {
1067         type => 'string',
1068         optional => 1,
1069         enum => ['in', 'out', 'group'],
1070     },
1071     action => {
1072         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1073         type => 'string',
1074         optional => 1,
1075         pattern => $security_group_name_pattern,
1076         maxLength => 20,
1077         minLength => 2,
1078     },
1079     macro => {
1080         type => 'string',
1081         optional => 1,
1082         maxLength => 128,
1083     },
1084     iface => get_standard_option('pve-iface', { optional => 1 }),
1085     source => {
1086         type => 'string', format => 'pve-fw-addr-spec',
1087         optional => 1,
1088     },
1089     dest => {
1090         type => 'string', format => 'pve-fw-addr-spec',
1091         optional => 1,
1092     },
1093     proto => {
1094         type => 'string', format => 'pve-fw-protocol-spec',
1095         optional => 1,
1096     },
1097     enable => {
1098         type => 'boolean',
1099         optional => 1,
1100     },
1101     sport => {
1102         type => 'string', format => 'pve-fw-port-spec',
1103         optional => 1,
1104     },
1105     dport => {
1106         type => 'string', format => 'pve-fw-port-spec',
1107         optional => 1,
1108     },
1109     comment => {
1110         type => 'string',
1111         optional => 1,
1112     },
1113 };
1114
1115 sub add_rule_properties {
1116     my ($properties) = @_;
1117
1118     foreach my $k (keys %$rule_properties) {
1119         my $h = $rule_properties->{$k};
1120         # copy data, so that we can modify later without side effects
1121         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1122     }
1123
1124     return $properties;
1125 }
1126
1127 sub delete_rule_properties {
1128     my ($rule, $delete_str) = @_;
1129
1130     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1131         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1132             if !defined($rule_properties->{$opt});
1133         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1134             if $opt eq 'type' || $opt eq 'action';
1135         delete $rule->{$opt};
1136     }
1137
1138     return $rule;
1139 }
1140
1141 my $apply_macro = sub {
1142     my ($macro_name, $param, $verify) = @_;
1143
1144     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1145     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1146
1147     my $rules = [];
1148
1149     foreach my $templ (@$macro_rules) {
1150         my $rule = {};
1151         my $param_used = {};
1152         foreach my $k (keys %$templ) {
1153             my $v = $templ->{$k};
1154             if ($v eq 'PARAM') {
1155                 $v = $param->{$k};
1156                 $param_used->{$k} = 1;
1157             } elsif ($v eq 'DEST') {
1158                 $v = $param->{dest};
1159                 $param_used->{dest} = 1;
1160             } elsif ($v eq 'SOURCE') {
1161                 $v = $param->{source};
1162                 $param_used->{source} = 1;
1163             }
1164
1165             if (!defined($v)) {
1166                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1167                 raise_param_exc({ macro => $msg }) if $verify;
1168                 die "$msg\n";
1169             }
1170             $rule->{$k} = $v;
1171         }
1172         foreach my $k (keys %$param) {
1173             next if $k eq 'macro';
1174             next if !defined($param->{$k});
1175             next if $param_used->{$k};
1176             if (defined($rule->{$k})) {
1177                 if ($rule->{$k} ne $param->{$k}) {
1178                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1179                     raise_param_exc({ $k => $msg }) if $verify;
1180                     die "$msg\n";
1181                 }
1182             } else {
1183                 $rule->{$k} = $param->{$k};
1184             }
1185         }
1186         push @$rules, $rule;
1187     }
1188
1189     return $rules;
1190 };
1191
1192 my $rule_env_iface_lookup = {
1193     'ct' => 1,
1194     'vm' => 1,
1195     'group' => 0,
1196     'cluster' => 1,
1197     'host' => 1,
1198 };
1199
1200 sub verify_rule {
1201     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1202
1203     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1204
1205     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1206     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1207
1208     my $errors = $rule->{errors} || {};
1209
1210     my $error_count = 0;
1211
1212     my $add_error = sub {
1213         my ($param, $msg)  = @_;
1214         chomp $msg;
1215         raise_param_exc({ $param => $msg }) if !$noerr;
1216         $error_count++;
1217         $errors->{$param} = $msg if !$errors->{$param};
1218     };
1219
1220     my $ipversion;
1221     my $set_ip_version = sub {
1222         my $vers = shift;
1223         if ($vers) {
1224             die "detected mixed ipv4/ipv6 adresses in rule\n"
1225                 if $ipversion && ($vers != $ipversion);
1226             $ipversion = $vers;
1227         }
1228     };
1229
1230     my $check_ipset_or_alias_property = sub {
1231         my ($name, $expected_ipversion) = @_;
1232
1233         if (my $value = $rule->{$name}) {
1234             if ($value =~ m/^\+/) {
1235                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1236                     &$add_error($name, "no such ipset '$1'")
1237                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1238
1239                 } else {
1240                     &$add_error($name, "invalid ipset name '$value'");
1241                 }
1242             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1243                 my $alias = lc($value);
1244                 &$add_error($name, "no such alias '$value'")
1245                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1246
1247                 my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1248                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1249
1250                 &$set_ip_version($e->{ipversion});
1251             }
1252         }
1253     };
1254
1255     my $type = $rule->{type};
1256     my $action = $rule->{action};
1257
1258     &$add_error('type', "missing property") if !$type;
1259     &$add_error('action', "missing property") if !$action;
1260
1261     if ($type) {
1262         if ($type eq  'in' || $type eq 'out') {
1263             &$add_error('action', "unknown action '$action'")
1264                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1265         } elsif ($type eq 'group') {
1266             &$add_error('type', "security groups not allowed")
1267                 if !$allow_groups;
1268             &$add_error('action', "invalid characters in security group name")
1269                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1270         } else {
1271             &$add_error('type', "unknown rule type '$type'");
1272         }
1273     }
1274
1275     if ($rule->{iface}) {
1276         &$add_error('type', "parameter -i not allowed for this rule type")
1277             if !$allow_iface;
1278         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1279         &$add_error('iface', $@) if $@;
1280         if ($rule_env eq 'vm') {
1281             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1282                 if $rule->{iface} !~  m/^net(\d+)$/;
1283         } elsif ($rule_env eq 'ct') {
1284             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1285                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1286         }
1287     }
1288
1289     if ($rule->{macro}) {
1290         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1291             $rule->{macro} = $preferred_name;
1292         } else {
1293             &$add_error('macro', "unknown macro '$rule->{macro}'");
1294         }
1295     }
1296
1297     if ($rule->{proto}) {
1298         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1299         &$add_error('proto', $@) if $@;
1300         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1301         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1302     }
1303
1304     if ($rule->{dport}) {
1305         eval { parse_port_name_number_or_range($rule->{dport}); };
1306         &$add_error('dport', $@) if $@;
1307         &$add_error('proto', "missing property - 'dport' requires this property")
1308             if !$rule->{proto};
1309     }
1310
1311     if ($rule->{sport}) {
1312         eval { parse_port_name_number_or_range($rule->{sport}); };
1313         &$add_error('sport', $@) if $@;
1314         &$add_error('proto', "missing property - 'sport' requires this property")
1315             if !$rule->{proto};
1316     }
1317
1318     if ($rule->{source}) {
1319         eval {
1320             my $source_ipversion = parse_address_list($rule->{source});
1321             &$set_ip_version($source_ipversion);
1322         };
1323         &$add_error('source', $@) if $@;
1324         &$check_ipset_or_alias_property('source', $ipversion);
1325     }
1326
1327     if ($rule->{dest}) {
1328         eval {
1329             my $dest_ipversion = parse_address_list($rule->{dest});
1330             &$set_ip_version($dest_ipversion);
1331         };
1332         &$add_error('dest', $@) if $@;
1333         &$check_ipset_or_alias_property('dest', $ipversion);
1334     }
1335
1336     if ($rule->{macro} && !$error_count) {
1337         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1338         if (my $err = $@) {
1339             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1340                 my $eh = $err->{errors};
1341                 foreach my $p (keys %$eh) {
1342                     &$add_error($p, $eh->{$p});
1343                 }
1344             } else {
1345                 &$add_error('macro', "$err");
1346             }
1347         }
1348     }
1349
1350     $rule->{errors} = $errors if $error_count;
1351     $rule->{ipversion} = $ipversion if $ipversion;
1352
1353     return $rule;
1354 }
1355
1356 sub copy_rule_data {
1357     my ($rule, $param) = @_;
1358
1359     foreach my $k (keys %$rule_properties) {
1360         if (defined(my $v = $param->{$k})) {
1361             if ($v eq '' || $v eq '-') {
1362                 delete $rule->{$k};
1363             } else {
1364                 $rule->{$k} = $v;
1365             }
1366         }
1367     }
1368
1369     return $rule;
1370 }
1371
1372 sub rules_modify_permissions {
1373     my ($rule_env) = @_;
1374
1375     if ($rule_env eq 'host') {
1376         return {
1377             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1378         };
1379     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1380         return {
1381             check => ['perm', '/', [ 'Sys.Modify' ]],
1382         };
1383     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1384         return {
1385             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1386         }
1387     }
1388
1389     return undef;
1390 }
1391
1392 sub rules_audit_permissions {
1393     my ($rule_env) = @_;
1394
1395     if ($rule_env eq 'host') {
1396         return {
1397             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1398         };
1399     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1400         return {
1401             check => ['perm', '/', [ 'Sys.Audit' ]],
1402         };
1403     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1404         return {
1405             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1406         }
1407     }
1408
1409     return undef;
1410 }
1411
1412 # core functions
1413 my $bridge_firewall_enabled = 0;
1414
1415 sub enable_bridge_firewall {
1416
1417     return if $bridge_firewall_enabled; # only once
1418
1419     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1420     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1421
1422     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1423     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1424
1425     $bridge_firewall_enabled = 1;
1426 }
1427
1428 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1429
1430 sub iptables_restore_cmdlist {
1431     my ($cmdlist) = @_;
1432
1433     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1434 }
1435
1436 sub ip6tables_restore_cmdlist {
1437     my ($cmdlist) = @_;
1438
1439     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1440 }
1441
1442 sub ipset_restore_cmdlist {
1443     my ($cmdlist) = @_;
1444
1445     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1446 }
1447
1448 sub iptables_get_chains {
1449     my ($iptablescmd) = @_;
1450
1451     $iptablescmd = "iptables" if !$iptablescmd;
1452
1453     my $res = {};
1454
1455     # check what chains we want to track
1456     my $is_pvefw_chain = sub {
1457         my $name = shift;
1458
1459         return 1 if $name =~ m/^PVEFW-\S+$/;
1460
1461         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1462
1463         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1464
1465         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1466
1467         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1468         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1469
1470         return undef;
1471     };
1472
1473     my $table = '';
1474
1475     my $hooks = {};
1476
1477     my $parser = sub {
1478         my $line = shift;
1479
1480         return if $line =~ m/^#/;
1481         return if $line =~ m/^\s*$/;
1482
1483         if ($line =~ m/^\*(\S+)$/) {
1484             $table = $1;
1485             return;
1486         }
1487
1488         return if $table ne 'filter';
1489
1490         if ($line =~ m/^:(\S+)\s/) {
1491             my $chain = $1;
1492             return if !&$is_pvefw_chain($chain);
1493             $res->{$chain} = "unknown";
1494         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1495             my ($chain, $sig) = ($1, $2);
1496             return if !&$is_pvefw_chain($chain);
1497             $res->{$chain} = $sig;
1498         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1499             $hooks->{$1} = 1;
1500         } else {
1501             # simply ignore the rest
1502             return;
1503         }
1504     };
1505
1506     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1507
1508     return wantarray ? ($res, $hooks) : $res;
1509 }
1510
1511 sub iptables_chain_digest {
1512     my ($rules) = @_;
1513     my $digest = Digest::SHA->new('sha1');
1514     foreach my $rule (@$rules) { # order is important
1515         $digest->add($rule);
1516     }
1517     return $digest->b64digest;
1518 }
1519
1520 sub ipset_chain_digest {
1521     my ($rules) = @_;
1522
1523     my $digest = Digest::SHA->new('sha1');
1524     foreach my $rule (sort @$rules) { # note: sorted
1525         $digest->add($rule);
1526     }
1527     return $digest->b64digest;
1528 }
1529
1530 sub ipset_get_chains {
1531
1532     my $res = {};
1533     my $chains = {};
1534
1535     my $parser = sub {
1536         my $line = shift;
1537
1538         return if $line =~ m/^#/;
1539         return if $line =~ m/^\s*$/;
1540         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1541             my $chain = $1;
1542             $line =~ s/\s+$//; # delete trailing white space
1543             push @{$chains->{$chain}}, $line;
1544         } else {
1545             # simply ignore the rest
1546             return;
1547         }
1548     };
1549
1550     run_command("/usr/sbin/ipset save", outfunc => $parser);
1551
1552     # compute digest for each chain
1553     foreach my $chain (keys %$chains) {
1554         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1555     }
1556
1557     return $res;
1558 }
1559
1560 sub ruleset_generate_cmdstr {
1561     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1562
1563     return if defined($rule->{enable}) && !$rule->{enable};
1564     return if $rule->{errors};
1565
1566     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1567
1568     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1569     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1570
1571     my @cmd = ();
1572
1573     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1574     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1575
1576     my $source = $rule->{source};
1577     my $dest = $rule->{dest};
1578
1579     if ($source) {
1580         if ($source =~ m/^\+/) {
1581             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1582                 my $name = $1;
1583                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1584                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1585                     push @cmd, "-m set --match-set ${ipset_chain} src";
1586                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1587                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1588                     push @cmd, "-m set --match-set ${ipset_chain} src";
1589                 } else {
1590                     die "no such ipset '$name'\n";
1591                 }
1592             } else {
1593                 die "invalid security group name '$source'\n";
1594             }
1595         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1596             my $alias = lc($source);
1597             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1598             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1599             die "no such alias '$source'\n" if !$e;
1600             push @cmd, "-s $e->{cidr}";
1601         } elsif ($source =~ m/\-/){
1602             push @cmd, "-m iprange --src-range $source";
1603         } else {
1604             push @cmd, "-s $source";
1605         }
1606     }
1607
1608     if ($dest) {
1609         if ($dest =~ m/^\+/) {
1610             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1611                 my $name = $1;
1612                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1613                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1614                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1615                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1616                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1617                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1618                 } else {
1619                     die "no such ipset '$name'\n";
1620                 }
1621             } else {
1622                 die "invalid security group name '$dest'\n";
1623             }
1624         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1625             my $alias = lc($dest);
1626             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1627             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1628             die "no such alias '$dest'\n" if !$e;
1629             push @cmd, "-d $e->{cidr}";
1630         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1631             push @cmd, "-m iprange --dst-range $dest";
1632         } else {
1633             push @cmd, "-d $dest";
1634         }
1635     }
1636
1637     if ($rule->{proto}) {
1638         push @cmd, "-p $rule->{proto}";
1639
1640         my $multiport = 0;
1641         $multiport++ if $nbdport > 1;
1642         $multiport++ if $nbsport > 1;
1643
1644         push @cmd, "--match multiport" if $multiport;
1645
1646         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1647             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1648
1649         if ($rule->{dport}) {
1650             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1651                 # Note: we use dport to store --icmp-type
1652                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1653                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1654             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1655                 # Note: we use dport to store --icmpv6-type
1656                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1657                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1658             } else {
1659                 if ($nbdport > 1) {
1660                     if ($multiport == 2) {
1661                         push @cmd,  "--ports $rule->{dport}";
1662                     } else {
1663                         push @cmd, "--dports $rule->{dport}";
1664                     }
1665                 } else {
1666                     push @cmd, "--dport $rule->{dport}";
1667                 }
1668             }
1669         }
1670
1671         if ($rule->{sport}) {
1672             if ($nbsport > 1) {
1673                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1674             } else {
1675                 push @cmd, "--sport $rule->{sport}";
1676             }
1677         }
1678     } elsif ($rule->{dport} || $rule->{sport}) {
1679         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1680         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1681     }
1682
1683     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1684
1685     if (my $action = $rule->{action}) {
1686         $action = $actions->{$action} if defined($actions->{$action});
1687         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1688         push @cmd, $goto ? "-g $action" : "-j $action";
1689     }
1690
1691     return scalar(@cmd) ? join(' ', @cmd) : undef;
1692 }
1693
1694 sub ruleset_generate_rule {
1695     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1696
1697     my $rules;
1698
1699     if ($rule->{macro}) {
1700         $rules = &$apply_macro($rule->{macro}, $rule);
1701     } else {
1702         $rules = [ $rule ];
1703     }
1704
1705     # update all or nothing
1706
1707     my @cmds = ();
1708     foreach my $tmp (@$rules) {
1709         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1710             push @cmds, $cmdstr;
1711         }
1712     }
1713
1714     foreach my $cmdstr (@cmds) {
1715         ruleset_addrule($ruleset, $chain, $cmdstr);
1716     }
1717 }
1718
1719 sub ruleset_generate_rule_insert {
1720     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1721
1722     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1723
1724     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1725         ruleset_insertrule($ruleset, $chain, $cmdstr);
1726     }
1727 }
1728
1729 sub ruleset_create_chain {
1730     my ($ruleset, $chain) = @_;
1731
1732     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1733     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1734
1735     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1736
1737     $ruleset->{$chain} = [];
1738 }
1739
1740 sub ruleset_chain_exist {
1741     my ($ruleset, $chain) = @_;
1742
1743     return $ruleset->{$chain} ? 1 : undef;
1744 }
1745
1746 sub ruleset_addrule {
1747    my ($ruleset, $chain, $rule) = @_;
1748
1749    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1750
1751    push @{$ruleset->{$chain}}, "-A $chain $rule";
1752 }
1753
1754 sub ruleset_insertrule {
1755    my ($ruleset, $chain, $rule) = @_;
1756
1757    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1758
1759    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1760 }
1761
1762 sub get_log_rule_base {
1763     my ($chain, $vmid, $msg, $loglevel) = @_;
1764
1765     die "internal error - no log level" if !defined($loglevel);
1766
1767     $vmid = 0 if !defined($vmid);
1768
1769     # Note: we use special format for prefix to pass further
1770     # info to log daemon (VMID, LOGVELEL and CHAIN)
1771
1772     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1773 }
1774
1775 sub ruleset_addlog {
1776     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1777
1778     return if !defined($loglevel);
1779
1780     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1781
1782     $logrule = "$rule $logrule" if defined($rule);
1783
1784     ruleset_addrule($ruleset, $chain, $logrule);
1785 }
1786
1787 sub ruleset_add_chain_policy {
1788     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1789
1790     if ($policy eq 'ACCEPT') {
1791
1792         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1793                               { ACCEPT =>  $accept_action});
1794
1795     } elsif ($policy eq 'DROP') {
1796
1797         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1798
1799         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1800
1801         ruleset_addrule($ruleset, $chain, "-j DROP");
1802     } elsif ($policy eq 'REJECT') {
1803         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1804
1805         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1806
1807         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1808     } else {
1809         # should not happen
1810         die "internal error: unknown policy '$policy'";
1811     }
1812 }
1813
1814 sub ruleset_chain_add_conn_filters {
1815     my ($ruleset, $chain, $accept) = @_;
1816
1817     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1818     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1819 }
1820
1821 sub ruleset_chain_add_input_filters {
1822     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1823
1824     if ($cluster_conf->{ipset}->{blacklist}){
1825         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1826             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1827             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1828             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1829         }
1830         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1831         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1832     }
1833
1834     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1835         if ($ipversion == 4) {
1836             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1837         }
1838     }
1839
1840     if ($options->{tcpflags}) {
1841         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1842     }
1843 }
1844
1845 sub ruleset_create_vm_chain {
1846     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1847
1848     ruleset_create_chain($ruleset, $chain);
1849     my $accept = generate_nfqueue($options);
1850
1851     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1852         if ($direction eq 'OUT') {
1853             ruleset_generate_rule($ruleset, $chain, $ipversion,
1854                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1855                                     proto => 'udp', sport => 68, dport => 67 });
1856         } else {
1857             ruleset_generate_rule($ruleset, $chain, $ipversion,
1858                                   { action => 'ACCEPT',
1859                                     proto => 'udp', sport => 67, dport => 68 });
1860         }
1861     }
1862
1863     if ($direction eq 'OUT') {
1864         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1865             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1866         }
1867         if ($ipfilter_ipset) {
1868             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1869         }
1870         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1871     }
1872 }
1873
1874 sub ruleset_add_group_rule {
1875     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1876
1877     my $group = $rule->{action};
1878     my $group_chain = "GROUP-$group-$direction";
1879     if(!ruleset_chain_exist($ruleset, $group_chain)){
1880         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1881     }
1882
1883     if ($direction eq 'OUT' && $rule->{iface_out}) {
1884         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1885     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1886         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1887     } else {
1888         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1889     }
1890
1891     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1892 }
1893
1894 sub ruleset_generate_vm_rules {
1895     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1896
1897     my $lc_direction = lc($direction);
1898
1899     my $in_accept = generate_nfqueue($options);
1900
1901     foreach my $rule (@$rules) {
1902         next if $rule->{iface} && $rule->{iface} ne $netid;
1903         next if !$rule->{enable} || $rule->{errors};
1904         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1905
1906         if ($rule->{type} eq 'group') {
1907             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1908                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1909         } else {
1910             next if $rule->{type} ne $lc_direction;
1911             eval {
1912                 if ($direction eq 'OUT') {
1913                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1914                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1915                                           undef, $cluster_conf, $vmfw_conf);
1916                 } else {
1917                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1918                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1919                                           undef, $cluster_conf, $vmfw_conf);
1920                 }
1921             };
1922             warn $@ if $@;
1923         }
1924     }
1925 }
1926
1927 sub generate_nfqueue {
1928     my ($options) = @_;
1929
1930     if ($options->{ips}) {
1931         my $action = "NFQUEUE";
1932         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1933             if (defined($3) && defined($1)) {
1934                 $action .= " --queue-balance $1:$3";
1935             } elsif (defined($1)) {
1936                 $action .= " --queue-num $1";
1937             }
1938         }
1939         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1940         return $action;
1941     } else {
1942         return "ACCEPT";
1943     }
1944 }
1945
1946 sub ruleset_generate_vm_ipsrules {
1947     my ($ruleset, $options, $direction, $iface) = @_;
1948
1949     if ($options->{ips} && $direction eq 'IN') {
1950         my $nfqueue = generate_nfqueue($options);
1951
1952         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1953             ruleset_create_chain($ruleset, "PVEFW-IPS");
1954         }
1955
1956         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1957     }
1958 }
1959
1960 sub generate_venet_rules_direction {
1961     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1962
1963     my $lc_direction = lc($direction);
1964
1965     my $rules = $vmfw_conf->{rules};
1966
1967     my $options = $vmfw_conf->{options};
1968     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1969
1970     my $chain = "venet0-$vmid-$direction";
1971
1972     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
1973
1974     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1975
1976     # implement policy
1977     my $policy;
1978
1979     if ($direction eq 'OUT') {
1980         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1981     } else {
1982         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1983     }
1984
1985     my $accept = generate_nfqueue($options);
1986     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1987     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
1988
1989     if ($direction eq 'OUT') {
1990         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
1991             action => $chain,
1992             source => $ip,
1993             iface_in => 'venet0'});
1994     } else {
1995         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
1996             action => $chain,
1997             dest => $ip,
1998             iface_out => 'venet0'});
1999     }
2000 }
2001
2002 sub generate_tap_rules_direction {
2003     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2004
2005     my $lc_direction = lc($direction);
2006
2007     my $rules = $vmfw_conf->{rules};
2008
2009     my $options = $vmfw_conf->{options};
2010     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2011
2012     my $tapchain = "$iface-$direction";
2013
2014     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2015     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2016         if $vmfw_conf->{ipset}->{$ipfilter_name};
2017
2018     # create chain with mac and ip filter
2019     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2020
2021     if ($options->{enable}) {
2022         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2023
2024         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2025
2026         # implement policy
2027         my $policy;
2028
2029         if ($direction eq 'OUT') {
2030             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2031         } else {
2032         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2033         }
2034
2035         my $accept = generate_nfqueue($options);
2036         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2037         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2038     } else {
2039         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2040         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2041     }
2042
2043     # plug the tap chain to bridge chain
2044     if ($direction eq 'IN') {
2045         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2046                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2047     } else {
2048         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2049                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2050     }
2051 }
2052
2053 sub enable_host_firewall {
2054     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2055
2056     my $options = $hostfw_conf->{options};
2057     my $cluster_options = $cluster_conf->{options};
2058     my $rules = $hostfw_conf->{rules};
2059     my $cluster_rules = $cluster_conf->{rules};
2060
2061     # host inbound firewall
2062     my $chain = "PVEFW-HOST-IN";
2063     ruleset_create_chain($ruleset, $chain);
2064
2065     my $loglevel = get_option_log_level($options, "log_level_in");
2066
2067     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2068
2069     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2070     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2071
2072     # we use RETURN because we need to check also tap rules
2073     my $accept_action = 'RETURN';
2074
2075     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2076
2077     # add host rules first, so that cluster wide rules can be overwritten
2078     foreach my $rule (@$rules, @$cluster_rules) {
2079         next if !$rule->{enable} || $rule->{errors};
2080
2081         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2082
2083         eval {
2084             if ($rule->{type} eq 'group') {
2085                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2086             } elsif ($rule->{type} eq 'in') {
2087                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2088                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2089                                       undef, $cluster_conf, $hostfw_conf);
2090             }
2091         };
2092         warn $@ if $@;
2093         delete $rule->{iface_in};
2094     }
2095
2096     # allow standard traffic for management ipset (includes cluster network)
2097     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2098     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2099     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2100     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2101     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2102     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2103
2104     my $localnet = local_network();
2105
2106     # corosync
2107     if ($localnet) {
2108         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2109         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2110         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2111     }
2112
2113     # implement input policy
2114     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2115     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2116
2117     # host outbound firewall
2118     $chain = "PVEFW-HOST-OUT";
2119     ruleset_create_chain($ruleset, $chain);
2120
2121     $loglevel = get_option_log_level($options, "log_level_out");
2122
2123     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2124
2125     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2126
2127     # we use RETURN because we may want to check other thigs later
2128     $accept_action = 'RETURN';
2129
2130     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2131
2132     # add host rules first, so that cluster wide rules can be overwritten
2133     foreach my $rule (@$rules, @$cluster_rules) {
2134         next if !$rule->{enable} || $rule->{errors};
2135
2136         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2137         eval {
2138             if ($rule->{type} eq 'group') {
2139                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2140             } elsif ($rule->{type} eq 'out') {
2141                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2142                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2143                                       undef, $cluster_conf, $hostfw_conf);
2144             }
2145         };
2146         warn $@ if $@;
2147         delete $rule->{iface_out};
2148     }
2149
2150     # allow standard traffic on cluster network
2151     if ($localnet) {
2152         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2153         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2154         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2155         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2156
2157         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2158         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2159         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2160     }
2161
2162     # implement output policy
2163     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2164     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2165
2166     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2167     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2168 }
2169
2170 sub generate_group_rules {
2171     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2172
2173     my $rules = $cluster_conf->{groups}->{$group};
2174
2175     if (!$rules) {
2176         warn "no such security group '$group'\n";
2177         $rules = []; # create empty chain
2178     }
2179
2180     my $chain = "GROUP-${group}-IN";
2181
2182     ruleset_create_chain($ruleset, $chain);
2183     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2184
2185     foreach my $rule (@$rules) {
2186         next if $rule->{type} ne 'in';
2187         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2188         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2189                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2190                               undef, $cluster_conf);
2191     }
2192
2193     $chain = "GROUP-${group}-OUT";
2194
2195     ruleset_create_chain($ruleset, $chain);
2196     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2197
2198     foreach my $rule (@$rules) {
2199         next if $rule->{type} ne 'out';
2200         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2201         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2202         # check also other tap rules later
2203         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2204                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2205                               undef, $cluster_conf);
2206     }
2207 }
2208
2209 my $MAX_NETS = 32;
2210 my $valid_netdev_names = {};
2211 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2212     $valid_netdev_names->{"net$i"} = 1;
2213 }
2214
2215 sub parse_fw_rule {
2216     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2217
2218     my $orig_line = $line;
2219
2220     my $rule = {};
2221
2222     # we can add single line comments to the end of the rule
2223     if ($line =~ s/#\s*(.*?)\s*$//) {
2224         $rule->{comment} = decode('utf8', $1);
2225     }
2226
2227     # we can disable a rule when prefixed with '|'
2228
2229     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2230
2231     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2232         die "unable to parse rule: $line\n";
2233
2234     $rule->{type} = lc($1);
2235     $rule->{action} = $2;
2236
2237     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2238         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2239             $rule->{macro} = $1;
2240             $rule->{action} = $2;
2241         }
2242     }
2243
2244     while (length($line)) {
2245         if ($line =~ s/^-i (\S+)\s*//) {
2246             $rule->{iface} = $1;
2247             next;
2248         }
2249
2250         last if $rule->{type} eq 'group';
2251
2252         if ($line =~ s/^-p (\S+)\s*//) {
2253             $rule->{proto} = $1;
2254             next;
2255         }
2256
2257         if ($line =~ s/^-dport (\S+)\s*//) {
2258             $rule->{dport} = $1;
2259             next;
2260         }
2261
2262         if ($line =~ s/^-sport (\S+)\s*//) {
2263             $rule->{sport} = $1;
2264             next;
2265         }
2266         if ($line =~ s/^-source (\S+)\s*//) {
2267             $rule->{source} = $1;
2268             next;
2269         }
2270         if ($line =~ s/^-dest (\S+)\s*//) {
2271             $rule->{dest} = $1;
2272             next;
2273         }
2274
2275         last;
2276     }
2277
2278     die "unable to parse rule parameters: $line\n" if length($line);
2279
2280     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2281     if ($verbose && $rule->{errors}) {
2282         warn "$prefix - errors in rule parameters: $orig_line\n";
2283         foreach my $p (keys %{$rule->{errors}}) {
2284             warn "  $p: $rule->{errors}->{$p}\n";
2285         }
2286     }
2287
2288     return $rule;
2289 }
2290
2291 sub parse_vmfw_option {
2292     my ($line) = @_;
2293
2294     my ($opt, $value);
2295
2296     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2297
2298     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2299         $opt = lc($1);
2300         $value = int($2);
2301     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2302         $opt = lc($1);
2303         $value = $2 ? lc($3) : '';
2304     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2305         $opt = lc($1);
2306         $value = uc($3);
2307     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2308         $opt = lc($1);
2309         $value = $2;
2310     } else {
2311         die "can't parse option '$line'\n"
2312     }
2313
2314     return ($opt, $value);
2315 }
2316
2317 sub parse_hostfw_option {
2318     my ($line) = @_;
2319
2320     my ($opt, $value);
2321
2322     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2323
2324     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2325         $opt = lc($1);
2326         $value = int($2);
2327     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2328         $opt = lc($1);
2329         $value = $2 ? lc($3) : '';
2330     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2331         $opt = lc($1);
2332         $value = int($2);
2333     } else {
2334         die "can't parse option '$line'\n"
2335     }
2336
2337     return ($opt, $value);
2338 }
2339
2340 sub parse_clusterfw_option {
2341     my ($line) = @_;
2342
2343     my ($opt, $value);
2344
2345     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2346         $opt = lc($1);
2347         $value = int($2);
2348     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2349         $opt = lc($1);
2350         $value = uc($3);
2351     } else {
2352         die "can't parse option '$line'\n"
2353     }
2354
2355     return ($opt, $value);
2356 }
2357
2358 sub resolve_alias {
2359     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2360
2361     my $alias = lc($cidr);
2362     my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2363     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2364
2365     die "no such alias '$cidr'\n" if !$e;;
2366
2367     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2368 }
2369
2370 sub parse_ip_or_cidr {
2371     my ($cidr) = @_;
2372
2373     my $ipversion;
2374
2375     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2376         $cidr =~ s|/128$||;
2377         $ipversion = 6;
2378     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2379         $cidr =~ s|/32$||;
2380         $ipversion = 4;
2381     } else {
2382         die "value does not look like a valid IP address or CIDR network\n";
2383     }
2384
2385     return wantarray ? ($cidr, $ipversion) : $cidr;
2386 }
2387
2388 sub parse_alias {
2389     my ($line) = @_;
2390
2391     # we can add single line comments to the end of the line
2392     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2393
2394     if ($line =~ m/^(\S+)\s(\S+)$/) {
2395         my ($name, $cidr) = ($1, $2);
2396         my $ipversion;
2397
2398         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2399
2400         my $data = {
2401             name => $name,
2402             cidr => $cidr,
2403             ipversion => $ipversion,
2404         };
2405         $data->{comment} = $comment  if $comment;
2406         return $data;
2407     }
2408
2409     return undef;
2410 }
2411
2412 sub generic_fw_config_parser {
2413     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2414
2415     my $section;
2416     my $group;
2417
2418     my $res = $empty_conf;
2419
2420     while (defined(my $line = <$fh>)) {
2421         next if $line =~ m/^#/;
2422         next if $line =~ m/^\s*$/;
2423
2424         chomp $line;
2425
2426         my $linenr = $fh->input_line_number();
2427         my $prefix = "$filename (line $linenr)";
2428
2429         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2430             $section = 'options';
2431             next;
2432         }
2433
2434         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2435             $section = 'aliases';
2436             next;
2437         }
2438
2439         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2440             $section = 'groups';
2441             $group = lc($1);
2442             my $comment = $2;
2443             eval {
2444                 die "security group name too long\n" if length($group) > $max_group_name_length;
2445                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2446             };
2447             if (my $err = $@) {
2448                 ($section, $group, $comment) = undef;
2449                 warn "$prefix: $err";
2450                 next;
2451             }
2452
2453             $res->{$section}->{$group} = [];
2454             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2455                 if $comment;
2456             next;
2457         }
2458
2459         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2460             $section = 'rules';
2461             next;
2462         }
2463
2464         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2465             $section = 'ipset';
2466             $group = lc($1);
2467             my $comment = $2;
2468             eval {
2469                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2470                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2471             };
2472             if (my $err = $@) {
2473                 ($section, $group, $comment) = undef;
2474                 warn "$prefix: $err";
2475                 next;
2476             }
2477
2478             $res->{$section}->{$group} = [];
2479             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2480                 if $comment;
2481             next;
2482         }
2483
2484         if (!$section) {
2485             warn "$prefix: skip line - no section\n";
2486             next;
2487         }
2488
2489         if ($section eq 'options') {
2490             eval {
2491                 my ($opt, $value);
2492                 if ($rule_env eq 'cluster') {
2493                     ($opt, $value) = parse_clusterfw_option($line);
2494                 } elsif ($rule_env eq 'host') {
2495                     ($opt, $value) = parse_hostfw_option($line);
2496                 } else {
2497                     ($opt, $value) = parse_vmfw_option($line);
2498                 }
2499                 $res->{options}->{$opt} = $value;
2500             };
2501             warn "$prefix: $@" if $@;
2502         } elsif ($section eq 'aliases') {
2503             eval {
2504                 my $data = parse_alias($line);
2505                 $res->{aliases}->{lc($data->{name})} = $data;
2506             };
2507             warn "$prefix: $@" if $@;
2508         } elsif ($section eq 'rules') {
2509             my $rule;
2510             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2511             if (my $err = $@) {
2512                 warn "$prefix: $err";
2513                 next;
2514             }
2515             push @{$res->{$section}}, $rule;
2516         } elsif ($section eq 'groups') {
2517             my $rule;
2518             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2519             if (my $err = $@) {
2520                 warn "$prefix: $err";
2521                 next;
2522             }
2523             push @{$res->{$section}->{$group}}, $rule;
2524         } elsif ($section eq 'ipset') {
2525             # we can add single line comments to the end of the rule
2526             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2527
2528             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2529             my $nomatch = $1;
2530             my $cidr = $2;
2531             my $errors;
2532
2533             if ($nomatch && !$feature_ipset_nomatch) {
2534                 $errors->{nomatch} = "nomatch not supported by kernel";
2535             }
2536
2537             eval {
2538                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2539                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2540                 } else {
2541                     $cidr = parse_ip_or_cidr($cidr);
2542                 }
2543             };
2544             if (my $err = $@) {
2545                 chomp $err;
2546                 $errors->{cidr} = $err;
2547             }
2548
2549             my $entry = { cidr => $cidr };
2550             $entry->{nomatch} = 1 if $nomatch;
2551             $entry->{comment} = $comment if $comment;
2552             $entry->{errors} =  $errors if $errors;
2553
2554             if ($verbose && $errors) {
2555                 warn "$prefix - errors in ipset '$group': $line\n";
2556                 foreach my $p (keys %{$errors}) {
2557                     warn "  $p: $errors->{$p}\n";
2558                 }
2559             }
2560
2561             push @{$res->{$section}->{$group}}, $entry;
2562         } else {
2563             warn "$prefix: skip line - unknown section\n";
2564             next;
2565         }
2566     }
2567
2568     return $res;
2569 }
2570
2571 sub parse_hostfw_config {
2572     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2573
2574     my $empty_conf = { rules => [], options => {}};
2575
2576     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2577 }
2578
2579 sub parse_vmfw_config {
2580     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2581
2582     my $empty_conf = {
2583         rules => [],
2584         options => {},
2585         aliases => {},
2586         ipset => {} ,
2587         ipset_comments => {},
2588     };
2589
2590     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2591 }
2592
2593 sub parse_clusterfw_config {
2594     my ($filename, $fh, $verbose) = @_;
2595
2596     my $section;
2597     my $group;
2598
2599     my $empty_conf = {
2600         rules => [],
2601         options => {},
2602         aliases => {},
2603         groups => {},
2604         group_comments => {},
2605         ipset => {} ,
2606         ipset_comments => {},
2607     };
2608
2609     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2610 }
2611
2612 sub run_locked {
2613     my ($code, @param) = @_;
2614
2615     my $timeout = 10;
2616
2617     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2618
2619     die $@ if $@;
2620
2621     return $res;
2622 }
2623
2624 sub read_local_vm_config {
2625
2626     my $openvz = {};
2627     my $qemu = {};
2628
2629     my $vmdata = { openvz => $openvz, qemu => $qemu };
2630
2631     my $vmlist = PVE::Cluster::get_vmlist();
2632     return $vmdata if !$vmlist || !$vmlist->{ids};
2633     my $ids = $vmlist->{ids};
2634
2635     foreach my $vmid (keys %$ids) {
2636         next if !$vmid; # skip VE0
2637         my $d = $ids->{$vmid};
2638         next if !$d->{node} || $d->{node} ne $nodename;
2639         next if !$d->{type};
2640         if ($d->{type} eq 'openvz') {
2641             if ($have_pve_manager) {
2642                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2643                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2644                     $openvz->{$vmid} = $conf;
2645                 }
2646             }
2647         } elsif ($d->{type} eq 'qemu') {
2648             if ($have_qemu_server) {
2649                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2650                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2651                     $qemu->{$vmid} = $conf;
2652                 }
2653             }
2654         }
2655     }
2656
2657     return $vmdata;
2658 };
2659
2660 sub load_vmfw_conf {
2661     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2662
2663     my $vmfw_conf = {};
2664
2665     $dir = $pvefw_conf_dir if !defined($dir);
2666
2667     my $filename = "$dir/$vmid.fw";
2668     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2669         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2670         $vmfw_conf->{vmid} = $vmid;
2671     }
2672
2673     return $vmfw_conf;
2674 }
2675
2676 my $format_rules = sub {
2677     my ($rules, $allow_iface) = @_;
2678
2679     my $raw = '';
2680
2681     foreach my $rule (@$rules) {
2682         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2683             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2684             $raw .= uc($rule->{type});
2685             if ($rule->{macro}) {
2686                 $raw .= " $rule->{macro}($rule->{action})";
2687             } else {
2688                 $raw .= " " . $rule->{action};
2689             }
2690             if ($allow_iface && $rule->{iface}) {
2691                 $raw .= " -i $rule->{iface}";
2692             }
2693
2694             if ($rule->{type} ne  'group')  {
2695                 $raw .= " -source $rule->{source}" if $rule->{source};
2696                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2697                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2698                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2699                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2700             }
2701
2702             $raw .= " # " . encode('utf8', $rule->{comment})
2703                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2704             $raw .= "\n";
2705         } else {
2706             die "unknown rule type '$rule->{type}'";
2707         }
2708     }
2709
2710     return $raw;
2711 };
2712
2713 my $format_options = sub {
2714     my ($options) = @_;
2715
2716     my $raw = '';
2717
2718     $raw .= "[OPTIONS]\n\n";
2719     foreach my $opt (keys %$options) {
2720         $raw .= "$opt: $options->{$opt}\n";
2721     }
2722     $raw .= "\n";
2723
2724     return $raw;
2725 };
2726
2727 my $format_aliases = sub {
2728     my ($aliases) = @_;
2729
2730     my $raw = '';
2731
2732     $raw .= "[ALIASES]\n\n";
2733     foreach my $k (keys %$aliases) {
2734         my $e = $aliases->{$k};
2735         $raw .= "$e->{name} $e->{cidr}";
2736         $raw .= " # " . encode('utf8', $e->{comment})
2737             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2738         $raw .= "\n";
2739     }
2740     $raw .= "\n";
2741
2742     return $raw;
2743 };
2744
2745 my $format_ipsets = sub {
2746     my ($fw_conf) = @_;
2747
2748     my $raw = '';
2749
2750     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2751         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2752             my $utf8comment = encode('utf8', $comment);
2753             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2754         } else {
2755             $raw .= "[IPSET $ipset]\n\n";
2756         }
2757         my $options = $fw_conf->{ipset}->{$ipset};
2758
2759         my $nethash = {};
2760         foreach my $entry (@$options) {
2761             $nethash->{$entry->{cidr}} = $entry;
2762         }
2763
2764         foreach my $cidr (sort keys %$nethash) {
2765             my $entry = $nethash->{$cidr};
2766             my $line = $entry->{nomatch} ? '!' : '';
2767             $line .= $entry->{cidr};
2768             $line .= " # " . encode('utf8', $entry->{comment})
2769                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2770             $raw .= "$line\n";
2771         }
2772
2773         $raw .= "\n";
2774     }
2775
2776     return $raw;
2777 };
2778
2779 sub save_vmfw_conf {
2780     my ($vmid, $vmfw_conf) = @_;
2781
2782     my $raw = '';
2783
2784     my $options = $vmfw_conf->{options};
2785     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2786
2787     my $aliases = $vmfw_conf->{aliases};
2788     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2789
2790     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2791
2792     my $rules = $vmfw_conf->{rules} || [];
2793     if ($rules && scalar(@$rules)) {
2794         $raw .= "[RULES]\n\n";
2795         $raw .= &$format_rules($rules, 1);
2796         $raw .= "\n";
2797     }
2798
2799     mkdir $pvefw_conf_dir;
2800
2801     my $filename = "$pvefw_conf_dir/$vmid.fw";
2802     PVE::Tools::file_set_contents($filename, $raw);
2803 }
2804
2805 sub read_vm_firewall_configs {
2806     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2807
2808     my $vmfw_configs = {};
2809
2810     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2811         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2812         next if !$vmfw_conf->{options}; # skip if file does not exists
2813         $vmfw_configs->{$vmid} = $vmfw_conf;
2814     }
2815     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2816         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2817         next if !$vmfw_conf->{options}; # skip if file does not exists
2818         $vmfw_configs->{$vmid} = $vmfw_conf;
2819     }
2820
2821     return $vmfw_configs;
2822 }
2823
2824 sub get_option_log_level {
2825     my ($options, $k) = @_;
2826
2827     my $v = $options->{$k};
2828     $v = $default_log_level if !defined($v);
2829
2830     return undef if $v eq '' || $v eq 'nolog';
2831
2832     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2833
2834     return $v if ($v >= 0) && ($v <= 7);
2835
2836     warn "unknown log level ($k = '$v')\n";
2837
2838     return undef;
2839 }
2840
2841 sub generate_std_chains {
2842     my ($ruleset, $options, $ipversion) = @_;
2843
2844     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2845
2846     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2847
2848     my $chain;
2849
2850     if ($ipversion == 4) {
2851         # same as shorewall smurflog.
2852         $chain = 'PVEFW-smurflog';
2853         $std_chains->{$chain} = [];
2854
2855         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2856         push @{$std_chains->{$chain}}, "-j DROP";
2857     }
2858
2859     # same as shorewall logflags action.
2860     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2861     $chain = 'PVEFW-logflags';
2862     $std_chains->{$chain} = [];
2863
2864     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2865     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2866     push @{$std_chains->{$chain}}, "-j DROP";
2867
2868     foreach my $chain (keys %$std_chains) {
2869         ruleset_create_chain($ruleset, $chain);
2870         foreach my $rule (@{$std_chains->{$chain}}) {
2871             if (ref($rule)) {
2872                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2873             } else {
2874                 ruleset_addrule($ruleset, $chain, $rule);
2875             }
2876         }
2877     }
2878 }
2879
2880 sub generate_ipset_chains {
2881     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2882
2883     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2884
2885         my $options = $fw_conf->{ipset}->{$ipset};
2886
2887         # remove duplicates
2888         my $nethash = {};
2889         foreach my $entry (@$options) {
2890             next if $entry->{errors}; # skip entries with errors
2891             eval {
2892                 my ($cidr, $ver);
2893                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2894                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2895                 } else {
2896                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2897                 }
2898                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2899                 if ($ver == 6) {
2900                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2901                     $cidr = inet_ntop(AF_INET6, $ipv6);
2902                     $cidr =~ s|/128$||;
2903                 } else {
2904                     $cidr =~ s|/32$||;
2905                 }
2906
2907                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2908             };
2909             warn $@ if $@;
2910         }
2911
2912         foreach my $ipversion (4, 6) {
2913             my $data = $nethash->{$ipversion};
2914
2915             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2916
2917             my $hashsize = scalar(@$options);
2918             if ($hashsize <= 64) {
2919                 $hashsize = 64;
2920             } else {
2921                 $hashsize = round_powerof2($hashsize);
2922             }
2923
2924             my $family = $ipversion == "6" ? "inet6" : "inet";
2925
2926             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2927
2928             foreach my $cidr (sort keys %$data) {
2929                 my $entry = $data->{$cidr};
2930
2931                 my $cmd = "add $name $cidr";
2932                 if ($entry->{nomatch}) {
2933                     if ($feature_ipset_nomatch) {
2934                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2935                     } else {
2936                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2937                     }
2938                 } else {
2939                     push @{$ipset_ruleset->{$name}}, $cmd;
2940                 }
2941             }
2942         }
2943     }
2944 }
2945
2946 sub round_powerof2 {
2947     my ($int) = @_;
2948
2949     $int--;
2950     $int |= $int >> $_ foreach (1,2,4,8,16);
2951     return ++$int;
2952 }
2953
2954 sub load_clusterfw_conf {
2955     my ($filename, $verbose) = @_;
2956
2957     $filename = $clusterfw_conf_filename if !defined($filename);
2958
2959     my $cluster_conf = {};
2960     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2961         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2962     }
2963
2964     return $cluster_conf;
2965 }
2966
2967 sub save_clusterfw_conf {
2968     my ($cluster_conf) = @_;
2969
2970     my $raw = '';
2971
2972     my $options = $cluster_conf->{options};
2973     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2974
2975     my $aliases = $cluster_conf->{aliases};
2976     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2977
2978     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2979
2980     my $rules = $cluster_conf->{rules};
2981     if ($rules && scalar(@$rules)) {
2982         $raw .= "[RULES]\n\n";
2983         $raw .= &$format_rules($rules, 1);
2984         $raw .= "\n";
2985     }
2986
2987     if ($cluster_conf->{groups}) {
2988         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2989             my $rules = $cluster_conf->{groups}->{$group};
2990             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2991                 my $utf8comment = encode('utf8', $comment);
2992                 $raw .= "[group $group] # $utf8comment\n\n";
2993             } else {
2994                 $raw .= "[group $group]\n\n";
2995             }
2996
2997             $raw .= &$format_rules($rules, 0);
2998             $raw .= "\n";
2999         }
3000     }
3001
3002     mkdir $pvefw_conf_dir;
3003     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3004 }
3005
3006 sub load_hostfw_conf {
3007     my ($cluster_conf, $filename, $verbose) = @_;
3008
3009     $filename = $hostfw_conf_filename if !defined($filename);
3010
3011     my $hostfw_conf = {};
3012     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3013         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3014     }
3015     return $hostfw_conf;
3016 }
3017
3018 sub save_hostfw_conf {
3019     my ($hostfw_conf) = @_;
3020
3021     my $raw = '';
3022
3023     my $options = $hostfw_conf->{options};
3024     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3025
3026     my $rules = $hostfw_conf->{rules};
3027     if ($rules && scalar(@$rules)) {
3028         $raw .= "[RULES]\n\n";
3029         $raw .= &$format_rules($rules, 1);
3030         $raw .= "\n";
3031     }
3032
3033     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3034 }
3035
3036 sub compile {
3037     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3038
3039     my $vmfw_configs;
3040
3041     if ($vmdata) { # test mode
3042         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3043         my $filename = "$testdir/cluster.fw";
3044         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3045
3046         $filename = "$testdir/host.fw";
3047         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3048
3049         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3050     } else { # normal operation
3051         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3052
3053         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3054
3055         $vmdata = read_local_vm_config();
3056         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3057     }
3058
3059     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3060     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3061
3062     return ($ruleset, $ipset_ruleset, $rulesetv6);
3063 }
3064
3065 sub compile_iptables_filter {
3066     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3067
3068     $cluster_conf->{ipset}->{venet0} = [];
3069     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3070
3071     my $localnet;
3072     if ($cluster_conf->{aliases}->{local_network}) {
3073         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3074     } else {
3075         $localnet = local_network() || '127.0.0.0/8';
3076         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
3077     }
3078
3079     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3080
3081     return ({}, {}) if !$cluster_conf->{options}->{enable};
3082
3083     my $ruleset = {};
3084
3085     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3086     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3087
3088     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3089
3090     my $hostfw_options = $hostfw_conf->{options} || {};
3091
3092     # fixme: what log level should we use here?
3093     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3094
3095     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3096
3097
3098     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3099     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3100     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3101
3102     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3103     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3104
3105     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3106
3107     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3108     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3109
3110     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3111     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3112
3113     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3114
3115     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3116
3117     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3118
3119     my $ipset_ruleset = {};
3120
3121     # currently pveproxy don't works with ipv6, so let's generate host fw ipv4 only for the moment
3122     if ($hostfw_enable && ($ipversion == 4)) {
3123         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3124         warn $@ if $@; # just to be sure - should not happen
3125     }
3126
3127     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3128
3129     # generate firewall rules for QEMU VMs
3130     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3131         eval {
3132             my $conf = $vmdata->{qemu}->{$vmid};
3133             my $vmfw_conf = $vmfw_configs->{$vmid};
3134             return if !$vmfw_conf;
3135
3136             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3137
3138             foreach my $netid (keys %$conf) {
3139                 next if $netid !~ m/^net(\d+)$/;
3140                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3141                 next if !$net->{firewall};
3142                 my $iface = "tap${vmid}i$1";
3143
3144                 my $macaddr = $net->{macaddr};
3145                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3146                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3147                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3148                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3149             }
3150         };
3151         warn $@ if $@; # just to be sure - should not happen
3152     }
3153
3154     # generate firewall rules for OpenVZ containers
3155     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3156         eval {
3157             my $conf = $vmdata->{openvz}->{$vmid};
3158
3159             my $vmfw_conf = $vmfw_configs->{$vmid};
3160             return if !$vmfw_conf;
3161
3162             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3163
3164             if ($vmfw_conf->{options}->{enable}) {
3165                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3166                     my $ip = $conf->{ip_address}->{value};
3167                     $ip =~ s/\s+/,/g;
3168
3169                     my @ips = ();
3170
3171                     foreach my $singleip (split(',', $ip)) {
3172                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3173                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3174                         push @ips, $singleip if $singleip_ver == $ipversion;
3175                     }
3176
3177                     if (scalar(@ips)) {
3178                         my $ip_list = join(',', @ips);
3179                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3180                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3181                     }
3182                 }
3183             }
3184
3185             if ($conf->{netif} && $conf->{netif}->{value}) {
3186                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3187                 foreach my $netid (keys %$netif) {
3188                     my $d = $netif->{$netid};
3189                     my $bridge = $d->{bridge};
3190                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3191                     my $macaddr = $d->{mac};
3192                     my $iface = $d->{host_ifname};
3193                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3194                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3195                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3196                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3197                 }
3198             }
3199         };
3200         warn $@ if $@; # just to be sure - should not happen
3201     }
3202
3203     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3204         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3205     }
3206
3207     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3208
3209     return ($ruleset, $ipset_ruleset);
3210 }
3211
3212 sub get_ruleset_status {
3213     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3214
3215     my $statushash = {};
3216
3217     foreach my $chain (sort keys %$ruleset) {
3218         my $sig = &$digest_fn($ruleset->{$chain});
3219
3220         $statushash->{$chain}->{sig} = $sig;
3221
3222         my $oldsig = $active_chains->{$chain};
3223         if (!defined($oldsig)) {
3224             $statushash->{$chain}->{action} = 'create';
3225         } else {
3226             if ($oldsig eq $sig) {
3227                 $statushash->{$chain}->{action} = 'exists';
3228             } else {
3229                 $statushash->{$chain}->{action} = 'update';
3230             }
3231         }
3232         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3233         foreach my $cmd (@{$ruleset->{$chain}}) {
3234             print "\t$cmd\n" if $verbose;
3235         }
3236     }
3237
3238     foreach my $chain (sort keys %$active_chains) {
3239         if (!defined($ruleset->{$chain})) {
3240             my $sig = $active_chains->{$chain};
3241             $statushash->{$chain}->{action} = 'delete';
3242             $statushash->{$chain}->{sig} = $sig;
3243             print "delete $chain ($sig)\n" if $verbose;
3244         }
3245     }
3246
3247     return $statushash;
3248 }
3249
3250 sub print_sig_rule {
3251     my ($chain, $sig) = @_;
3252
3253     # We just use this to store a SHA1 checksum used to detect changes
3254     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3255 }
3256
3257 sub get_ruleset_cmdlist {
3258     my ($ruleset, $verbose, $iptablescmd) = @_;
3259
3260     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3261
3262     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3263     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3264
3265     # create missing chains first
3266     foreach my $chain (sort keys %$ruleset) {
3267         my $stat = $statushash->{$chain};
3268         die "internal error" if !$stat;
3269         next if $stat->{action} ne 'create';
3270
3271         $cmdlist .= ":$chain - [0:0]\n";
3272     }
3273
3274     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3275         my $chain = "PVEFW-$h";
3276         if ($ruleset->{$chain} && !$hooks->{$h}) {
3277             $cmdlist .= "-A $h -j $chain\n";
3278         }
3279     }
3280
3281     foreach my $chain (sort keys %$ruleset) {
3282         my $stat = $statushash->{$chain};
3283         die "internal error" if !$stat;
3284
3285         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3286             $cmdlist .= "-F $chain\n";
3287             foreach my $cmd (@{$ruleset->{$chain}}) {
3288                 $cmdlist .= "$cmd\n";
3289             }
3290             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3291         } elsif ($stat->{action} eq 'delete') {
3292             die "internal error"; # this should not happen
3293         } elsif ($stat->{action} eq 'exists') {
3294             # do nothing
3295         } else {
3296             die "internal error - unknown status '$stat->{action}'";
3297         }
3298     }
3299
3300     foreach my $chain (keys %$statushash) {
3301         next if $statushash->{$chain}->{action} ne 'delete';
3302         $cmdlist .= "-F $chain\n";
3303     }
3304     foreach my $chain (keys %$statushash) {
3305         next if $statushash->{$chain}->{action} ne 'delete';
3306         next if $chain eq 'PVEFW-INPUT';
3307         next if $chain eq 'PVEFW-OUTPUT';
3308         next if $chain eq 'PVEFW-FORWARD';
3309         $cmdlist .= "-X $chain\n";
3310     }
3311
3312     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3313
3314     $cmdlist .= "COMMIT\n";
3315
3316     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3317 }
3318
3319 sub get_ipset_cmdlist {
3320     my ($ruleset, $verbose) = @_;
3321
3322     my $cmdlist = "";
3323
3324     my $delete_cmdlist = "";
3325
3326     my $active_chains = ipset_get_chains();
3327     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3328
3329     # remove stale _swap chains
3330     foreach my $chain (keys %$active_chains) {
3331         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3332             $cmdlist .= "destroy $chain\n";
3333         }
3334     }
3335
3336     foreach my $chain (keys %$ruleset) {
3337         my $stat = $statushash->{$chain};
3338         die "internal error" if !$stat;
3339
3340         if ($stat->{action} eq 'create') {
3341             foreach my $cmd (@{$ruleset->{$chain}}) {
3342                 $cmdlist .= "$cmd\n";
3343             }
3344         }
3345     }
3346
3347     foreach my $chain (keys %$ruleset) {
3348         my $stat = $statushash->{$chain};
3349         die "internal error" if !$stat;
3350
3351         if ($stat->{action} eq 'update') {
3352             my $chain_swap = $chain."_swap";
3353
3354             foreach my $cmd (@{$ruleset->{$chain}}) {
3355                 $cmd =~ s/$chain/$chain_swap/;
3356                 $cmdlist .= "$cmd\n";
3357             }
3358             $cmdlist .= "swap $chain_swap $chain\n";
3359             $cmdlist .= "flush $chain_swap\n";
3360             $cmdlist .= "destroy $chain_swap\n";
3361         }
3362     }
3363
3364      # the remove unused chains
3365     foreach my $chain (keys %$statushash) {
3366         next if $statushash->{$chain}->{action} ne 'delete';
3367
3368         $delete_cmdlist .= "flush $chain\n";
3369         $delete_cmdlist .= "destroy $chain\n";
3370     }
3371
3372     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3373
3374     return ($cmdlist, $delete_cmdlist, $changes);
3375 }
3376
3377 sub apply_ruleset {
3378     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3379
3380     enable_bridge_firewall();
3381
3382     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3383         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3384
3385     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3386     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3387
3388     if ($verbose) {
3389         if ($ipset_changes) {
3390             print "ipset changes:\n";
3391             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3392             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3393         }
3394
3395         if ($changes) {
3396             print "iptables changes:\n";
3397             print $cmdlist;
3398         }
3399
3400         if ($changesv6) {
3401             print "ip6tables changes:\n";
3402             print $cmdlistv6;
3403         }
3404     }
3405
3406     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3407     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3408
3409     ipset_restore_cmdlist($ipset_create_cmdlist);
3410
3411     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3412     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3413
3414     iptables_restore_cmdlist($cmdlist);
3415
3416     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3417     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3418
3419     ip6tables_restore_cmdlist($cmdlistv6);
3420
3421     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3422     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3423
3424     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3425
3426     # test: re-read status and check if everything is up to date
3427     my $active_chains = iptables_get_chains();
3428     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3429
3430     my $errors;
3431     foreach my $chain (sort keys %$ruleset) {
3432         my $stat = $statushash->{$chain};
3433         if ($stat->{action} ne 'exists') {
3434             warn "unable to update chain '$chain'\n";
3435             $errors = 1;
3436         }
3437     }
3438
3439     my $active_chainsv6 = iptables_get_chains("ip6tables");
3440     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3441
3442     foreach my $chain (sort keys %$rulesetv6) {
3443         my $stat = $statushashv6->{$chain};
3444         if ($stat->{action} ne 'exists') {
3445             warn "unable to update chain '$chain'\n";
3446             $errors = 1;
3447         }
3448     }
3449
3450     die "unable to apply firewall changes\n" if $errors;
3451
3452     update_nf_conntrack_max($hostfw_conf);
3453
3454     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3455
3456 }
3457
3458 sub update_nf_conntrack_max {
3459     my ($hostfw_conf) = @_;
3460
3461     my $max = 65536; # reasonable default
3462
3463     my $options = $hostfw_conf->{options} || {};
3464
3465     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3466         $max = $options->{nf_conntrack_max};
3467         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3468     }
3469
3470     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3471     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3472
3473     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3474
3475     if ($current != $max) {
3476         my $hashsize = int($max/4);
3477         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3478         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3479     }
3480 }
3481
3482 sub update_nf_conntrack_tcp_timeout_established {
3483     my ($hostfw_conf) = @_;
3484
3485     my $options = $hostfw_conf->{options} || {};
3486
3487     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3488
3489     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3490 }
3491
3492 sub remove_pvefw_chains {
3493
3494     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3495     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3496     PVE::Firewall::remove_pvefw_chains_ipset();
3497
3498 }
3499
3500 sub remove_pvefw_chains_iptables {
3501     my ($iptablescmd) = @_;
3502
3503     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3504     my $cmdlist = "*filter\n";
3505
3506     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3507         if ($hooks->{$h}) {
3508             $cmdlist .= "-D $h -j PVEFW-$h\n";
3509         }
3510     }
3511
3512     foreach my $chain (keys %$chash) {
3513         $cmdlist .= "-F $chain\n";
3514     }
3515
3516     foreach my $chain (keys %$chash) {
3517         $cmdlist .= "-X $chain\n";
3518     }
3519     $cmdlist .= "COMMIT\n";
3520
3521     if($iptablescmd eq "ip6tables") {
3522         ip6tables_restore_cmdlist($cmdlist);
3523     } else {
3524         iptables_restore_cmdlist($cmdlist);
3525     }
3526 }
3527
3528 sub remove_pvefw_chains_ipset {
3529
3530     my $ipset_chains = ipset_get_chains();
3531
3532     my $cmdlist = "";
3533
3534     foreach my $chain (keys %$ipset_chains) {
3535         $cmdlist .= "flush $chain\n";
3536         $cmdlist .= "destroy $chain\n";
3537     }
3538
3539     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3540 }
3541
3542 sub init {
3543     my $cluster_conf = load_clusterfw_conf();
3544     my $cluster_options = $cluster_conf->{options};
3545     my $enable = $cluster_options->{enable};
3546
3547     return if !$enable;
3548
3549     # load required modules here
3550 }
3551
3552 sub update {
3553     my $code = sub {
3554
3555         my $cluster_conf = load_clusterfw_conf();
3556         my $cluster_options = $cluster_conf->{options};
3557
3558         if (!$cluster_options->{enable}) {
3559             PVE::Firewall::remove_pvefw_chains();
3560             return;
3561         }
3562
3563         my $hostfw_conf = load_hostfw_conf();
3564
3565         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3566
3567         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3568     };
3569
3570     run_locked($code);
3571 }
3572
3573 1;