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                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1247                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1248
1249                 &$set_ip_version($e->{ipversion});
1250             }
1251         }
1252     };
1253
1254     my $type = $rule->{type};
1255     my $action = $rule->{action};
1256
1257     &$add_error('type', "missing property") if !$type;
1258     &$add_error('action', "missing property") if !$action;
1259
1260     if ($type) {
1261         if ($type eq  'in' || $type eq 'out') {
1262             &$add_error('action', "unknown action '$action'")
1263                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1264         } elsif ($type eq 'group') {
1265             &$add_error('type', "security groups not allowed")
1266                 if !$allow_groups;
1267             &$add_error('action', "invalid characters in security group name")
1268                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1269         } else {
1270             &$add_error('type', "unknown rule type '$type'");
1271         }
1272     }
1273
1274     if ($rule->{iface}) {
1275         &$add_error('type', "parameter -i not allowed for this rule type")
1276             if !$allow_iface;
1277         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1278         &$add_error('iface', $@) if $@;
1279         if ($rule_env eq 'vm') {
1280             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1281                 if $rule->{iface} !~  m/^net(\d+)$/;
1282         } elsif ($rule_env eq 'ct') {
1283             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1284                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1285         }
1286     }
1287
1288     if ($rule->{macro}) {
1289         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1290             $rule->{macro} = $preferred_name;
1291         } else {
1292             &$add_error('macro', "unknown macro '$rule->{macro}'");
1293         }
1294     }
1295
1296     if ($rule->{proto}) {
1297         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1298         &$add_error('proto', $@) if $@;
1299         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1300         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1301     }
1302
1303     if ($rule->{dport}) {
1304         eval { parse_port_name_number_or_range($rule->{dport}); };
1305         &$add_error('dport', $@) if $@;
1306         &$add_error('proto', "missing property - 'dport' requires this property")
1307             if !$rule->{proto};
1308     }
1309
1310     if ($rule->{sport}) {
1311         eval { parse_port_name_number_or_range($rule->{sport}); };
1312         &$add_error('sport', $@) if $@;
1313         &$add_error('proto', "missing property - 'sport' requires this property")
1314             if !$rule->{proto};
1315     }
1316
1317     if ($rule->{source}) {
1318         eval {
1319             my $source_ipversion = parse_address_list($rule->{source});
1320             &$set_ip_version($source_ipversion);
1321         };
1322         &$add_error('source', $@) if $@;
1323         &$check_ipset_or_alias_property('source', $ipversion);
1324     }
1325
1326     if ($rule->{dest}) {
1327         eval {
1328             my $dest_ipversion = parse_address_list($rule->{dest});
1329             &$set_ip_version($dest_ipversion);
1330         };
1331         &$add_error('dest', $@) if $@;
1332         &$check_ipset_or_alias_property('dest', $ipversion);
1333     }
1334
1335     if ($rule->{macro} && !$error_count) {
1336         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1337         if (my $err = $@) {
1338             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1339                 my $eh = $err->{errors};
1340                 foreach my $p (keys %$eh) {
1341                     &$add_error($p, $eh->{$p});
1342                 }
1343             } else {
1344                 &$add_error('macro', "$err");
1345             }
1346         }
1347     }
1348
1349     $rule->{errors} = $errors if $error_count;
1350     $rule->{ipversion} = $ipversion if $ipversion;
1351
1352     return $rule;
1353 }
1354
1355 sub copy_rule_data {
1356     my ($rule, $param) = @_;
1357
1358     foreach my $k (keys %$rule_properties) {
1359         if (defined(my $v = $param->{$k})) {
1360             if ($v eq '' || $v eq '-') {
1361                 delete $rule->{$k};
1362             } else {
1363                 $rule->{$k} = $v;
1364             }
1365         }
1366     }
1367
1368     return $rule;
1369 }
1370
1371 sub rules_modify_permissions {
1372     my ($rule_env) = @_;
1373
1374     if ($rule_env eq 'host') {
1375         return {
1376             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1377         };
1378     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1379         return {
1380             check => ['perm', '/', [ 'Sys.Modify' ]],
1381         };
1382     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1383         return {
1384             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1385         }
1386     }
1387
1388     return undef;
1389 }
1390
1391 sub rules_audit_permissions {
1392     my ($rule_env) = @_;
1393
1394     if ($rule_env eq 'host') {
1395         return {
1396             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1397         };
1398     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1399         return {
1400             check => ['perm', '/', [ 'Sys.Audit' ]],
1401         };
1402     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1403         return {
1404             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1405         }
1406     }
1407
1408     return undef;
1409 }
1410
1411 # core functions
1412 my $bridge_firewall_enabled = 0;
1413
1414 sub enable_bridge_firewall {
1415
1416     return if $bridge_firewall_enabled; # only once
1417
1418     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1419     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1420
1421     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1422     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1423
1424     $bridge_firewall_enabled = 1;
1425 }
1426
1427 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1428
1429 sub iptables_restore_cmdlist {
1430     my ($cmdlist) = @_;
1431
1432     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1433 }
1434
1435 sub ip6tables_restore_cmdlist {
1436     my ($cmdlist) = @_;
1437
1438     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1439 }
1440
1441 sub ipset_restore_cmdlist {
1442     my ($cmdlist) = @_;
1443
1444     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1445 }
1446
1447 sub iptables_get_chains {
1448     my ($iptablescmd) = @_;
1449
1450     $iptablescmd = "iptables" if !$iptablescmd;
1451
1452     my $res = {};
1453
1454     # check what chains we want to track
1455     my $is_pvefw_chain = sub {
1456         my $name = shift;
1457
1458         return 1 if $name =~ m/^PVEFW-\S+$/;
1459
1460         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1461
1462         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1463
1464         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1465
1466         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1467         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1468
1469         return undef;
1470     };
1471
1472     my $table = '';
1473
1474     my $hooks = {};
1475
1476     my $parser = sub {
1477         my $line = shift;
1478
1479         return if $line =~ m/^#/;
1480         return if $line =~ m/^\s*$/;
1481
1482         if ($line =~ m/^\*(\S+)$/) {
1483             $table = $1;
1484             return;
1485         }
1486
1487         return if $table ne 'filter';
1488
1489         if ($line =~ m/^:(\S+)\s/) {
1490             my $chain = $1;
1491             return if !&$is_pvefw_chain($chain);
1492             $res->{$chain} = "unknown";
1493         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1494             my ($chain, $sig) = ($1, $2);
1495             return if !&$is_pvefw_chain($chain);
1496             $res->{$chain} = $sig;
1497         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1498             $hooks->{$1} = 1;
1499         } else {
1500             # simply ignore the rest
1501             return;
1502         }
1503     };
1504
1505     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1506
1507     return wantarray ? ($res, $hooks) : $res;
1508 }
1509
1510 sub iptables_chain_digest {
1511     my ($rules) = @_;
1512     my $digest = Digest::SHA->new('sha1');
1513     foreach my $rule (@$rules) { # order is important
1514         $digest->add($rule);
1515     }
1516     return $digest->b64digest;
1517 }
1518
1519 sub ipset_chain_digest {
1520     my ($rules) = @_;
1521
1522     my $digest = Digest::SHA->new('sha1');
1523     foreach my $rule (sort @$rules) { # note: sorted
1524         $digest->add($rule);
1525     }
1526     return $digest->b64digest;
1527 }
1528
1529 sub ipset_get_chains {
1530
1531     my $res = {};
1532     my $chains = {};
1533
1534     my $parser = sub {
1535         my $line = shift;
1536
1537         return if $line =~ m/^#/;
1538         return if $line =~ m/^\s*$/;
1539         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1540             my $chain = $1;
1541             $line =~ s/\s+$//; # delete trailing white space
1542             push @{$chains->{$chain}}, $line;
1543         } else {
1544             # simply ignore the rest
1545             return;
1546         }
1547     };
1548
1549     run_command("/usr/sbin/ipset save", outfunc => $parser);
1550
1551     # compute digest for each chain
1552     foreach my $chain (keys %$chains) {
1553         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1554     }
1555
1556     return $res;
1557 }
1558
1559 sub ruleset_generate_cmdstr {
1560     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1561
1562     return if defined($rule->{enable}) && !$rule->{enable};
1563     return if $rule->{errors};
1564
1565     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1566
1567     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1568     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1569
1570     my @cmd = ();
1571
1572     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1573     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1574
1575     my $source = $rule->{source};
1576     my $dest = $rule->{dest};
1577
1578     if ($source) {
1579         if ($source =~ m/^\+/) {
1580             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1581                 my $name = $1;
1582                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1583                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1584                     push @cmd, "-m set --match-set ${ipset_chain} src";
1585                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1586                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1587                     push @cmd, "-m set --match-set ${ipset_chain} src";
1588                 } else {
1589                     die "no such ipset '$name'\n";
1590                 }
1591             } else {
1592                 die "invalid security group name '$source'\n";
1593             }
1594         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1595             my $alias = lc($source);
1596             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1597             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1598             die "no such alias '$source'\n" if !$e;
1599             push @cmd, "-s $e->{cidr}";
1600         } elsif ($source =~ m/\-/){
1601             push @cmd, "-m iprange --src-range $source";
1602         } else {
1603             push @cmd, "-s $source";
1604         }
1605     }
1606
1607     if ($dest) {
1608         if ($dest =~ m/^\+/) {
1609             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1610                 my $name = $1;
1611                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1612                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1613                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1614                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1615                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1616                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1617                 } else {
1618                     die "no such ipset '$name'\n";
1619                 }
1620             } else {
1621                 die "invalid security group name '$dest'\n";
1622             }
1623         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1624             my $alias = lc($dest);
1625             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1626             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1627             die "no such alias '$dest'\n" if !$e;
1628             push @cmd, "-d $e->{cidr}";
1629         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1630             push @cmd, "-m iprange --dst-range $dest";
1631         } else {
1632             push @cmd, "-d $dest";
1633         }
1634     }
1635
1636     if ($rule->{proto}) {
1637         push @cmd, "-p $rule->{proto}";
1638
1639         my $multiport = 0;
1640         $multiport++ if $nbdport > 1;
1641         $multiport++ if $nbsport > 1;
1642
1643         push @cmd, "--match multiport" if $multiport;
1644
1645         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1646             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1647
1648         if ($rule->{dport}) {
1649             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1650                 # Note: we use dport to store --icmp-type
1651                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1652                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1653             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1654                 # Note: we use dport to store --icmpv6-type
1655                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1656                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1657             } else {
1658                 if ($nbdport > 1) {
1659                     if ($multiport == 2) {
1660                         push @cmd,  "--ports $rule->{dport}";
1661                     } else {
1662                         push @cmd, "--dports $rule->{dport}";
1663                     }
1664                 } else {
1665                     push @cmd, "--dport $rule->{dport}";
1666                 }
1667             }
1668         }
1669
1670         if ($rule->{sport}) {
1671             if ($nbsport > 1) {
1672                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1673             } else {
1674                 push @cmd, "--sport $rule->{sport}";
1675             }
1676         }
1677     } elsif ($rule->{dport} || $rule->{sport}) {
1678         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1679         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1680     }
1681
1682     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1683
1684     if (my $action = $rule->{action}) {
1685         $action = $actions->{$action} if defined($actions->{$action});
1686         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1687         push @cmd, $goto ? "-g $action" : "-j $action";
1688     }
1689
1690     return scalar(@cmd) ? join(' ', @cmd) : undef;
1691 }
1692
1693 sub ruleset_generate_rule {
1694     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1695
1696     my $rules;
1697
1698     if ($rule->{macro}) {
1699         $rules = &$apply_macro($rule->{macro}, $rule);
1700     } else {
1701         $rules = [ $rule ];
1702     }
1703
1704     # update all or nothing
1705
1706     my @cmds = ();
1707     foreach my $tmp (@$rules) {
1708         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1709             push @cmds, $cmdstr;
1710         }
1711     }
1712
1713     foreach my $cmdstr (@cmds) {
1714         ruleset_addrule($ruleset, $chain, $cmdstr);
1715     }
1716 }
1717
1718 sub ruleset_generate_rule_insert {
1719     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1720
1721     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1722
1723     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1724         ruleset_insertrule($ruleset, $chain, $cmdstr);
1725     }
1726 }
1727
1728 sub ruleset_create_chain {
1729     my ($ruleset, $chain) = @_;
1730
1731     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1732     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1733
1734     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1735
1736     $ruleset->{$chain} = [];
1737 }
1738
1739 sub ruleset_chain_exist {
1740     my ($ruleset, $chain) = @_;
1741
1742     return $ruleset->{$chain} ? 1 : undef;
1743 }
1744
1745 sub ruleset_addrule {
1746    my ($ruleset, $chain, $rule) = @_;
1747
1748    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1749
1750    push @{$ruleset->{$chain}}, "-A $chain $rule";
1751 }
1752
1753 sub ruleset_insertrule {
1754    my ($ruleset, $chain, $rule) = @_;
1755
1756    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1757
1758    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1759 }
1760
1761 sub get_log_rule_base {
1762     my ($chain, $vmid, $msg, $loglevel) = @_;
1763
1764     die "internal error - no log level" if !defined($loglevel);
1765
1766     $vmid = 0 if !defined($vmid);
1767
1768     # Note: we use special format for prefix to pass further
1769     # info to log daemon (VMID, LOGVELEL and CHAIN)
1770
1771     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1772 }
1773
1774 sub ruleset_addlog {
1775     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1776
1777     return if !defined($loglevel);
1778
1779     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1780
1781     $logrule = "$rule $logrule" if defined($rule);
1782
1783     ruleset_addrule($ruleset, $chain, $logrule);
1784 }
1785
1786 sub ruleset_add_chain_policy {
1787     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1788
1789     if ($policy eq 'ACCEPT') {
1790
1791         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1792                               { ACCEPT =>  $accept_action});
1793
1794     } elsif ($policy eq 'DROP') {
1795
1796         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1797
1798         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1799
1800         ruleset_addrule($ruleset, $chain, "-j DROP");
1801     } elsif ($policy eq 'REJECT') {
1802         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1803
1804         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1805
1806         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1807     } else {
1808         # should not happen
1809         die "internal error: unknown policy '$policy'";
1810     }
1811 }
1812
1813 sub ruleset_chain_add_conn_filters {
1814     my ($ruleset, $chain, $accept) = @_;
1815
1816     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1817     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1818 }
1819
1820 sub ruleset_chain_add_input_filters {
1821     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1822
1823     if ($cluster_conf->{ipset}->{blacklist}){
1824         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1825             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1826             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1827             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1828         }
1829         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1830         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1831     }
1832
1833     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1834         if ($ipversion == 4) {
1835             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1836         }
1837     }
1838
1839     if ($options->{tcpflags}) {
1840         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1841     }
1842 }
1843
1844 sub ruleset_create_vm_chain {
1845     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1846
1847     ruleset_create_chain($ruleset, $chain);
1848     my $accept = generate_nfqueue($options);
1849
1850     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1851         if ($direction eq 'OUT') {
1852             ruleset_generate_rule($ruleset, $chain, $ipversion,
1853                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1854                                     proto => 'udp', sport => 68, dport => 67 });
1855         } else {
1856             ruleset_generate_rule($ruleset, $chain, $ipversion,
1857                                   { action => 'ACCEPT',
1858                                     proto => 'udp', sport => 67, dport => 68 });
1859         }
1860     }
1861
1862     if ($direction eq 'OUT') {
1863         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1864             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1865         }
1866         if ($ipfilter_ipset) {
1867             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1868         }
1869         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1870     }
1871 }
1872
1873 sub ruleset_add_group_rule {
1874     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1875
1876     my $group = $rule->{action};
1877     my $group_chain = "GROUP-$group-$direction";
1878     if(!ruleset_chain_exist($ruleset, $group_chain)){
1879         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1880     }
1881
1882     if ($direction eq 'OUT' && $rule->{iface_out}) {
1883         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1884     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1885         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1886     } else {
1887         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1888     }
1889
1890     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1891 }
1892
1893 sub ruleset_generate_vm_rules {
1894     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1895
1896     my $lc_direction = lc($direction);
1897
1898     my $in_accept = generate_nfqueue($options);
1899
1900     foreach my $rule (@$rules) {
1901         next if $rule->{iface} && $rule->{iface} ne $netid;
1902         next if !$rule->{enable} || $rule->{errors};
1903         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1904
1905         if ($rule->{type} eq 'group') {
1906             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1907                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1908         } else {
1909             next if $rule->{type} ne $lc_direction;
1910             eval {
1911                 if ($direction eq 'OUT') {
1912                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1913                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1914                                           undef, $cluster_conf, $vmfw_conf);
1915                 } else {
1916                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1917                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1918                                           undef, $cluster_conf, $vmfw_conf);
1919                 }
1920             };
1921             warn $@ if $@;
1922         }
1923     }
1924 }
1925
1926 sub generate_nfqueue {
1927     my ($options) = @_;
1928
1929     if ($options->{ips}) {
1930         my $action = "NFQUEUE";
1931         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1932             if (defined($3) && defined($1)) {
1933                 $action .= " --queue-balance $1:$3";
1934             } elsif (defined($1)) {
1935                 $action .= " --queue-num $1";
1936             }
1937         }
1938         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1939         return $action;
1940     } else {
1941         return "ACCEPT";
1942     }
1943 }
1944
1945 sub ruleset_generate_vm_ipsrules {
1946     my ($ruleset, $options, $direction, $iface) = @_;
1947
1948     if ($options->{ips} && $direction eq 'IN') {
1949         my $nfqueue = generate_nfqueue($options);
1950
1951         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1952             ruleset_create_chain($ruleset, "PVEFW-IPS");
1953         }
1954
1955         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1956     }
1957 }
1958
1959 sub generate_venet_rules_direction {
1960     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1961
1962     my $lc_direction = lc($direction);
1963
1964     my $rules = $vmfw_conf->{rules};
1965
1966     my $options = $vmfw_conf->{options};
1967     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1968
1969     my $chain = "venet0-$vmid-$direction";
1970
1971     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
1972
1973     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1974
1975     # implement policy
1976     my $policy;
1977
1978     if ($direction eq 'OUT') {
1979         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1980     } else {
1981         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1982     }
1983
1984     my $accept = generate_nfqueue($options);
1985     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1986     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
1987
1988     if ($direction eq 'OUT') {
1989         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
1990             action => $chain,
1991             source => $ip,
1992             iface_in => 'venet0'});
1993     } else {
1994         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
1995             action => $chain,
1996             dest => $ip,
1997             iface_out => 'venet0'});
1998     }
1999 }
2000
2001 sub generate_tap_rules_direction {
2002     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2003
2004     my $lc_direction = lc($direction);
2005
2006     my $rules = $vmfw_conf->{rules};
2007
2008     my $options = $vmfw_conf->{options};
2009     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2010
2011     my $tapchain = "$iface-$direction";
2012
2013     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2014     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2015         if $vmfw_conf->{ipset}->{$ipfilter_name};
2016
2017     # create chain with mac and ip filter
2018     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2019
2020     if ($options->{enable}) {
2021         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2022
2023         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2024
2025         # implement policy
2026         my $policy;
2027
2028         if ($direction eq 'OUT') {
2029             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2030         } else {
2031         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2032         }
2033
2034         my $accept = generate_nfqueue($options);
2035         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2036         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2037     } else {
2038         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2039         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2040     }
2041
2042     # plug the tap chain to bridge chain
2043     if ($direction eq 'IN') {
2044         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2045                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2046     } else {
2047         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2048                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2049     }
2050 }
2051
2052 sub enable_host_firewall {
2053     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2054
2055     my $options = $hostfw_conf->{options};
2056     my $cluster_options = $cluster_conf->{options};
2057     my $rules = $hostfw_conf->{rules};
2058     my $cluster_rules = $cluster_conf->{rules};
2059
2060     # host inbound firewall
2061     my $chain = "PVEFW-HOST-IN";
2062     ruleset_create_chain($ruleset, $chain);
2063
2064     my $loglevel = get_option_log_level($options, "log_level_in");
2065
2066     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2067
2068     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2069     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2070
2071     # we use RETURN because we need to check also tap rules
2072     my $accept_action = 'RETURN';
2073
2074     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2075
2076     # add host rules first, so that cluster wide rules can be overwritten
2077     foreach my $rule (@$rules, @$cluster_rules) {
2078         next if !$rule->{enable} || $rule->{errors};
2079
2080         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2081
2082         eval {
2083             if ($rule->{type} eq 'group') {
2084                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2085             } elsif ($rule->{type} eq 'in') {
2086                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2087                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2088                                       undef, $cluster_conf, $hostfw_conf);
2089             }
2090         };
2091         warn $@ if $@;
2092         delete $rule->{iface_in};
2093     }
2094
2095     # allow standard traffic for management ipset (includes cluster network)
2096     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2097     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2098     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2099     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2100     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2101     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2102
2103     my $localnet = local_network();
2104
2105     # corosync
2106     if ($localnet) {
2107         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2108         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2109         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2110     }
2111
2112     # implement input policy
2113     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2114     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2115
2116     # host outbound firewall
2117     $chain = "PVEFW-HOST-OUT";
2118     ruleset_create_chain($ruleset, $chain);
2119
2120     $loglevel = get_option_log_level($options, "log_level_out");
2121
2122     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2123
2124     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2125
2126     # we use RETURN because we may want to check other thigs later
2127     $accept_action = 'RETURN';
2128
2129     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2130
2131     # add host rules first, so that cluster wide rules can be overwritten
2132     foreach my $rule (@$rules, @$cluster_rules) {
2133         next if !$rule->{enable} || $rule->{errors};
2134
2135         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2136         eval {
2137             if ($rule->{type} eq 'group') {
2138                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2139             } elsif ($rule->{type} eq 'out') {
2140                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2141                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2142                                       undef, $cluster_conf, $hostfw_conf);
2143             }
2144         };
2145         warn $@ if $@;
2146         delete $rule->{iface_out};
2147     }
2148
2149     # allow standard traffic on cluster network
2150     if ($localnet) {
2151         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2152         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2153         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2154         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2155
2156         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2157         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2158         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2159     }
2160
2161     # implement output policy
2162     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2163     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2164
2165     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2166     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2167 }
2168
2169 sub generate_group_rules {
2170     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2171
2172     my $rules = $cluster_conf->{groups}->{$group};
2173
2174     if (!$rules) {
2175         warn "no such security group '$group'\n";
2176         $rules = []; # create empty chain
2177     }
2178
2179     my $chain = "GROUP-${group}-IN";
2180
2181     ruleset_create_chain($ruleset, $chain);
2182     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2183
2184     foreach my $rule (@$rules) {
2185         next if $rule->{type} ne 'in';
2186         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2187         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2188                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2189                               undef, $cluster_conf);
2190     }
2191
2192     $chain = "GROUP-${group}-OUT";
2193
2194     ruleset_create_chain($ruleset, $chain);
2195     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2196
2197     foreach my $rule (@$rules) {
2198         next if $rule->{type} ne 'out';
2199         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2200         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2201         # check also other tap rules later
2202         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2203                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2204                               undef, $cluster_conf);
2205     }
2206 }
2207
2208 my $MAX_NETS = 32;
2209 my $valid_netdev_names = {};
2210 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2211     $valid_netdev_names->{"net$i"} = 1;
2212 }
2213
2214 sub parse_fw_rule {
2215     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2216
2217     my $orig_line = $line;
2218
2219     my $rule = {};
2220
2221     # we can add single line comments to the end of the rule
2222     if ($line =~ s/#\s*(.*?)\s*$//) {
2223         $rule->{comment} = decode('utf8', $1);
2224     }
2225
2226     # we can disable a rule when prefixed with '|'
2227
2228     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2229
2230     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2231         die "unable to parse rule: $line\n";
2232
2233     $rule->{type} = lc($1);
2234     $rule->{action} = $2;
2235
2236     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2237         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2238             $rule->{macro} = $1;
2239             $rule->{action} = $2;
2240         }
2241     }
2242
2243     while (length($line)) {
2244         if ($line =~ s/^-i (\S+)\s*//) {
2245             $rule->{iface} = $1;
2246             next;
2247         }
2248
2249         last if $rule->{type} eq 'group';
2250
2251         if ($line =~ s/^-p (\S+)\s*//) {
2252             $rule->{proto} = $1;
2253             next;
2254         }
2255
2256         if ($line =~ s/^-dport (\S+)\s*//) {
2257             $rule->{dport} = $1;
2258             next;
2259         }
2260
2261         if ($line =~ s/^-sport (\S+)\s*//) {
2262             $rule->{sport} = $1;
2263             next;
2264         }
2265         if ($line =~ s/^-source (\S+)\s*//) {
2266             $rule->{source} = $1;
2267             next;
2268         }
2269         if ($line =~ s/^-dest (\S+)\s*//) {
2270             $rule->{dest} = $1;
2271             next;
2272         }
2273
2274         last;
2275     }
2276
2277     die "unable to parse rule parameters: $line\n" if length($line);
2278
2279     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2280     if ($verbose && $rule->{errors}) {
2281         warn "$prefix - errors in rule parameters: $orig_line\n";
2282         foreach my $p (keys %{$rule->{errors}}) {
2283             warn "  $p: $rule->{errors}->{$p}\n";
2284         }
2285     }
2286
2287     return $rule;
2288 }
2289
2290 sub parse_vmfw_option {
2291     my ($line) = @_;
2292
2293     my ($opt, $value);
2294
2295     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2296
2297     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2298         $opt = lc($1);
2299         $value = int($2);
2300     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2301         $opt = lc($1);
2302         $value = $2 ? lc($3) : '';
2303     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2304         $opt = lc($1);
2305         $value = uc($3);
2306     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2307         $opt = lc($1);
2308         $value = $2;
2309     } else {
2310         die "can't parse option '$line'\n"
2311     }
2312
2313     return ($opt, $value);
2314 }
2315
2316 sub parse_hostfw_option {
2317     my ($line) = @_;
2318
2319     my ($opt, $value);
2320
2321     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2322
2323     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2324         $opt = lc($1);
2325         $value = int($2);
2326     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2327         $opt = lc($1);
2328         $value = $2 ? lc($3) : '';
2329     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2330         $opt = lc($1);
2331         $value = int($2);
2332     } else {
2333         die "can't parse option '$line'\n"
2334     }
2335
2336     return ($opt, $value);
2337 }
2338
2339 sub parse_clusterfw_option {
2340     my ($line) = @_;
2341
2342     my ($opt, $value);
2343
2344     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2345         $opt = lc($1);
2346         $value = int($2);
2347     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2348         $opt = lc($1);
2349         $value = uc($3);
2350     } else {
2351         die "can't parse option '$line'\n"
2352     }
2353
2354     return ($opt, $value);
2355 }
2356
2357 sub resolve_alias {
2358     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2359
2360     my $alias = lc($cidr);
2361     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2362     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2363
2364     die "no such alias '$cidr'\n" if !$e;;
2365
2366     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2367 }
2368
2369 sub parse_ip_or_cidr {
2370     my ($cidr) = @_;
2371
2372     my $ipversion;
2373
2374     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2375         $cidr =~ s|/128$||;
2376         $ipversion = 6;
2377     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2378         $cidr =~ s|/32$||;
2379         $ipversion = 4;
2380     } else {
2381         die "value does not look like a valid IP address or CIDR network\n";
2382     }
2383
2384     return wantarray ? ($cidr, $ipversion) : $cidr;
2385 }
2386
2387 sub parse_alias {
2388     my ($line) = @_;
2389
2390     # we can add single line comments to the end of the line
2391     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2392
2393     if ($line =~ m/^(\S+)\s(\S+)$/) {
2394         my ($name, $cidr) = ($1, $2);
2395         my $ipversion;
2396
2397         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2398
2399         my $data = {
2400             name => $name,
2401             cidr => $cidr,
2402             ipversion => $ipversion,
2403         };
2404         $data->{comment} = $comment  if $comment;
2405         return $data;
2406     }
2407
2408     return undef;
2409 }
2410
2411 sub generic_fw_config_parser {
2412     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2413
2414     my $section;
2415     my $group;
2416
2417     my $res = $empty_conf;
2418
2419     while (defined(my $line = <$fh>)) {
2420         next if $line =~ m/^#/;
2421         next if $line =~ m/^\s*$/;
2422
2423         chomp $line;
2424
2425         my $linenr = $fh->input_line_number();
2426         my $prefix = "$filename (line $linenr)";
2427
2428         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2429             $section = 'options';
2430             next;
2431         }
2432
2433         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2434             $section = 'aliases';
2435             next;
2436         }
2437
2438         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2439             $section = 'groups';
2440             $group = lc($1);
2441             my $comment = $2;
2442             eval {
2443                 die "security group name too long\n" if length($group) > $max_group_name_length;
2444                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2445             };
2446             if (my $err = $@) {
2447                 ($section, $group, $comment) = undef;
2448                 warn "$prefix: $err";
2449                 next;
2450             }
2451
2452             $res->{$section}->{$group} = [];
2453             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2454                 if $comment;
2455             next;
2456         }
2457
2458         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2459             $section = 'rules';
2460             next;
2461         }
2462
2463         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2464             $section = 'ipset';
2465             $group = lc($1);
2466             my $comment = $2;
2467             eval {
2468                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2469                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2470             };
2471             if (my $err = $@) {
2472                 ($section, $group, $comment) = undef;
2473                 warn "$prefix: $err";
2474                 next;
2475             }
2476
2477             $res->{$section}->{$group} = [];
2478             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2479                 if $comment;
2480             next;
2481         }
2482
2483         if (!$section) {
2484             warn "$prefix: skip line - no section\n";
2485             next;
2486         }
2487
2488         if ($section eq 'options') {
2489             eval {
2490                 my ($opt, $value);
2491                 if ($rule_env eq 'cluster') {
2492                     ($opt, $value) = parse_clusterfw_option($line);
2493                 } elsif ($rule_env eq 'host') {
2494                     ($opt, $value) = parse_hostfw_option($line);
2495                 } else {
2496                     ($opt, $value) = parse_vmfw_option($line);
2497                 }
2498                 $res->{options}->{$opt} = $value;
2499             };
2500             warn "$prefix: $@" if $@;
2501         } elsif ($section eq 'aliases') {
2502             eval {
2503                 my $data = parse_alias($line);
2504                 $res->{aliases}->{lc($data->{name})} = $data;
2505             };
2506             warn "$prefix: $@" if $@;
2507         } elsif ($section eq 'rules') {
2508             my $rule;
2509             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2510             if (my $err = $@) {
2511                 warn "$prefix: $err";
2512                 next;
2513             }
2514             push @{$res->{$section}}, $rule;
2515         } elsif ($section eq 'groups') {
2516             my $rule;
2517             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2518             if (my $err = $@) {
2519                 warn "$prefix: $err";
2520                 next;
2521             }
2522             push @{$res->{$section}->{$group}}, $rule;
2523         } elsif ($section eq 'ipset') {
2524             # we can add single line comments to the end of the rule
2525             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2526
2527             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2528             my $nomatch = $1;
2529             my $cidr = $2;
2530             my $errors;
2531
2532             if ($nomatch && !$feature_ipset_nomatch) {
2533                 $errors->{nomatch} = "nomatch not supported by kernel";
2534             }
2535
2536             eval {
2537                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2538                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2539                 } else {
2540                     $cidr = parse_ip_or_cidr($cidr);
2541                 }
2542             };
2543             if (my $err = $@) {
2544                 chomp $err;
2545                 $errors->{cidr} = $err;
2546             }
2547
2548             my $entry = { cidr => $cidr };
2549             $entry->{nomatch} = 1 if $nomatch;
2550             $entry->{comment} = $comment if $comment;
2551             $entry->{errors} =  $errors if $errors;
2552
2553             if ($verbose && $errors) {
2554                 warn "$prefix - errors in ipset '$group': $line\n";
2555                 foreach my $p (keys %{$errors}) {
2556                     warn "  $p: $errors->{$p}\n";
2557                 }
2558             }
2559
2560             push @{$res->{$section}->{$group}}, $entry;
2561         } else {
2562             warn "$prefix: skip line - unknown section\n";
2563             next;
2564         }
2565     }
2566
2567     return $res;
2568 }
2569
2570 sub parse_hostfw_config {
2571     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2572
2573     my $empty_conf = { rules => [], options => {}};
2574
2575     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2576 }
2577
2578 sub parse_vmfw_config {
2579     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2580
2581     my $empty_conf = {
2582         rules => [],
2583         options => {},
2584         aliases => {},
2585         ipset => {} ,
2586         ipset_comments => {},
2587     };
2588
2589     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2590 }
2591
2592 sub parse_clusterfw_config {
2593     my ($filename, $fh, $verbose) = @_;
2594
2595     my $section;
2596     my $group;
2597
2598     my $empty_conf = {
2599         rules => [],
2600         options => {},
2601         aliases => {},
2602         groups => {},
2603         group_comments => {},
2604         ipset => {} ,
2605         ipset_comments => {},
2606     };
2607
2608     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2609 }
2610
2611 sub run_locked {
2612     my ($code, @param) = @_;
2613
2614     my $timeout = 10;
2615
2616     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2617
2618     die $@ if $@;
2619
2620     return $res;
2621 }
2622
2623 sub read_local_vm_config {
2624
2625     my $openvz = {};
2626     my $qemu = {};
2627
2628     my $vmdata = { openvz => $openvz, qemu => $qemu };
2629
2630     my $vmlist = PVE::Cluster::get_vmlist();
2631     return $vmdata if !$vmlist || !$vmlist->{ids};
2632     my $ids = $vmlist->{ids};
2633
2634     foreach my $vmid (keys %$ids) {
2635         next if !$vmid; # skip VE0
2636         my $d = $ids->{$vmid};
2637         next if !$d->{node} || $d->{node} ne $nodename;
2638         next if !$d->{type};
2639         if ($d->{type} eq 'openvz') {
2640             if ($have_pve_manager) {
2641                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2642                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2643                     $openvz->{$vmid} = $conf;
2644                 }
2645             }
2646         } elsif ($d->{type} eq 'qemu') {
2647             if ($have_qemu_server) {
2648                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2649                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2650                     $qemu->{$vmid} = $conf;
2651                 }
2652             }
2653         }
2654     }
2655
2656     return $vmdata;
2657 };
2658
2659 sub load_vmfw_conf {
2660     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2661
2662     my $vmfw_conf = {};
2663
2664     $dir = $pvefw_conf_dir if !defined($dir);
2665
2666     my $filename = "$dir/$vmid.fw";
2667     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2668         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2669         $vmfw_conf->{vmid} = $vmid;
2670     }
2671
2672     return $vmfw_conf;
2673 }
2674
2675 my $format_rules = sub {
2676     my ($rules, $allow_iface) = @_;
2677
2678     my $raw = '';
2679
2680     foreach my $rule (@$rules) {
2681         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2682             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2683             $raw .= uc($rule->{type});
2684             if ($rule->{macro}) {
2685                 $raw .= " $rule->{macro}($rule->{action})";
2686             } else {
2687                 $raw .= " " . $rule->{action};
2688             }
2689             if ($allow_iface && $rule->{iface}) {
2690                 $raw .= " -i $rule->{iface}";
2691             }
2692
2693             if ($rule->{type} ne  'group')  {
2694                 $raw .= " -source $rule->{source}" if $rule->{source};
2695                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2696                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2697                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2698                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2699             }
2700
2701             $raw .= " # " . encode('utf8', $rule->{comment})
2702                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2703             $raw .= "\n";
2704         } else {
2705             die "unknown rule type '$rule->{type}'";
2706         }
2707     }
2708
2709     return $raw;
2710 };
2711
2712 my $format_options = sub {
2713     my ($options) = @_;
2714
2715     my $raw = '';
2716
2717     $raw .= "[OPTIONS]\n\n";
2718     foreach my $opt (keys %$options) {
2719         $raw .= "$opt: $options->{$opt}\n";
2720     }
2721     $raw .= "\n";
2722
2723     return $raw;
2724 };
2725
2726 my $format_aliases = sub {
2727     my ($aliases) = @_;
2728
2729     my $raw = '';
2730
2731     $raw .= "[ALIASES]\n\n";
2732     foreach my $k (keys %$aliases) {
2733         my $e = $aliases->{$k};
2734         $raw .= "$e->{name} $e->{cidr}";
2735         $raw .= " # " . encode('utf8', $e->{comment})
2736             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2737         $raw .= "\n";
2738     }
2739     $raw .= "\n";
2740
2741     return $raw;
2742 };
2743
2744 my $format_ipsets = sub {
2745     my ($fw_conf) = @_;
2746
2747     my $raw = '';
2748
2749     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2750         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2751             my $utf8comment = encode('utf8', $comment);
2752             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2753         } else {
2754             $raw .= "[IPSET $ipset]\n\n";
2755         }
2756         my $options = $fw_conf->{ipset}->{$ipset};
2757
2758         my $nethash = {};
2759         foreach my $entry (@$options) {
2760             $nethash->{$entry->{cidr}} = $entry;
2761         }
2762
2763         foreach my $cidr (sort keys %$nethash) {
2764             my $entry = $nethash->{$cidr};
2765             my $line = $entry->{nomatch} ? '!' : '';
2766             $line .= $entry->{cidr};
2767             $line .= " # " . encode('utf8', $entry->{comment})
2768                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2769             $raw .= "$line\n";
2770         }
2771
2772         $raw .= "\n";
2773     }
2774
2775     return $raw;
2776 };
2777
2778 sub save_vmfw_conf {
2779     my ($vmid, $vmfw_conf) = @_;
2780
2781     my $raw = '';
2782
2783     my $options = $vmfw_conf->{options};
2784     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2785
2786     my $aliases = $vmfw_conf->{aliases};
2787     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2788
2789     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2790
2791     my $rules = $vmfw_conf->{rules} || [];
2792     if ($rules && scalar(@$rules)) {
2793         $raw .= "[RULES]\n\n";
2794         $raw .= &$format_rules($rules, 1);
2795         $raw .= "\n";
2796     }
2797
2798     mkdir $pvefw_conf_dir;
2799
2800     my $filename = "$pvefw_conf_dir/$vmid.fw";
2801     PVE::Tools::file_set_contents($filename, $raw);
2802 }
2803
2804 sub read_vm_firewall_configs {
2805     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2806
2807     my $vmfw_configs = {};
2808
2809     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2810         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2811         next if !$vmfw_conf->{options}; # skip if file does not exists
2812         $vmfw_configs->{$vmid} = $vmfw_conf;
2813     }
2814     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2815         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2816         next if !$vmfw_conf->{options}; # skip if file does not exists
2817         $vmfw_configs->{$vmid} = $vmfw_conf;
2818     }
2819
2820     return $vmfw_configs;
2821 }
2822
2823 sub get_option_log_level {
2824     my ($options, $k) = @_;
2825
2826     my $v = $options->{$k};
2827     $v = $default_log_level if !defined($v);
2828
2829     return undef if $v eq '' || $v eq 'nolog';
2830
2831     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2832
2833     return $v if ($v >= 0) && ($v <= 7);
2834
2835     warn "unknown log level ($k = '$v')\n";
2836
2837     return undef;
2838 }
2839
2840 sub generate_std_chains {
2841     my ($ruleset, $options, $ipversion) = @_;
2842
2843     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2844
2845     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2846
2847     my $chain;
2848
2849     if ($ipversion == 4) {
2850         # same as shorewall smurflog.
2851         $chain = 'PVEFW-smurflog';
2852         $std_chains->{$chain} = [];
2853
2854         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2855         push @{$std_chains->{$chain}}, "-j DROP";
2856     }
2857
2858     # same as shorewall logflags action.
2859     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2860     $chain = 'PVEFW-logflags';
2861     $std_chains->{$chain} = [];
2862
2863     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2864     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2865     push @{$std_chains->{$chain}}, "-j DROP";
2866
2867     foreach my $chain (keys %$std_chains) {
2868         ruleset_create_chain($ruleset, $chain);
2869         foreach my $rule (@{$std_chains->{$chain}}) {
2870             if (ref($rule)) {
2871                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2872             } else {
2873                 ruleset_addrule($ruleset, $chain, $rule);
2874             }
2875         }
2876     }
2877 }
2878
2879 sub generate_ipset_chains {
2880     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2881
2882     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2883
2884         my $options = $fw_conf->{ipset}->{$ipset};
2885
2886         # remove duplicates
2887         my $nethash = {};
2888         foreach my $entry (@$options) {
2889             next if $entry->{errors}; # skip entries with errors
2890             eval {
2891                 my ($cidr, $ver);
2892                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2893                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2894                 } else {
2895                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2896                 }
2897                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2898                 if ($ver == 6) {
2899                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2900                     $cidr = inet_ntop(AF_INET6, $ipv6);
2901                     $cidr =~ s|/128$||;
2902                 } else {
2903                     $cidr =~ s|/32$||;
2904                 }
2905
2906                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2907             };
2908             warn $@ if $@;
2909         }
2910
2911         foreach my $ipversion (4, 6) {
2912             my $data = $nethash->{$ipversion};
2913
2914             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2915
2916             my $hashsize = scalar(@$options);
2917             if ($hashsize <= 64) {
2918                 $hashsize = 64;
2919             } else {
2920                 $hashsize = round_powerof2($hashsize);
2921             }
2922
2923             my $family = $ipversion == "6" ? "inet6" : "inet";
2924
2925             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2926
2927             foreach my $cidr (sort keys %$data) {
2928                 my $entry = $data->{$cidr};
2929
2930                 my $cmd = "add $name $cidr";
2931                 if ($entry->{nomatch}) {
2932                     if ($feature_ipset_nomatch) {
2933                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2934                     } else {
2935                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2936                     }
2937                 } else {
2938                     push @{$ipset_ruleset->{$name}}, $cmd;
2939                 }
2940             }
2941         }
2942     }
2943 }
2944
2945 sub round_powerof2 {
2946     my ($int) = @_;
2947
2948     $int--;
2949     $int |= $int >> $_ foreach (1,2,4,8,16);
2950     return ++$int;
2951 }
2952
2953 sub load_clusterfw_conf {
2954     my ($filename, $verbose) = @_;
2955
2956     $filename = $clusterfw_conf_filename if !defined($filename);
2957
2958     my $cluster_conf = {};
2959     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2960         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2961     }
2962
2963     return $cluster_conf;
2964 }
2965
2966 sub save_clusterfw_conf {
2967     my ($cluster_conf) = @_;
2968
2969     my $raw = '';
2970
2971     my $options = $cluster_conf->{options};
2972     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2973
2974     my $aliases = $cluster_conf->{aliases};
2975     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2976
2977     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2978
2979     my $rules = $cluster_conf->{rules};
2980     if ($rules && scalar(@$rules)) {
2981         $raw .= "[RULES]\n\n";
2982         $raw .= &$format_rules($rules, 1);
2983         $raw .= "\n";
2984     }
2985
2986     if ($cluster_conf->{groups}) {
2987         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2988             my $rules = $cluster_conf->{groups}->{$group};
2989             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2990                 my $utf8comment = encode('utf8', $comment);
2991                 $raw .= "[group $group] # $utf8comment\n\n";
2992             } else {
2993                 $raw .= "[group $group]\n\n";
2994             }
2995
2996             $raw .= &$format_rules($rules, 0);
2997             $raw .= "\n";
2998         }
2999     }
3000
3001     mkdir $pvefw_conf_dir;
3002     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3003 }
3004
3005 sub load_hostfw_conf {
3006     my ($cluster_conf, $filename, $verbose) = @_;
3007
3008     $filename = $hostfw_conf_filename if !defined($filename);
3009
3010     my $hostfw_conf = {};
3011     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3012         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3013     }
3014     return $hostfw_conf;
3015 }
3016
3017 sub save_hostfw_conf {
3018     my ($hostfw_conf) = @_;
3019
3020     my $raw = '';
3021
3022     my $options = $hostfw_conf->{options};
3023     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3024
3025     my $rules = $hostfw_conf->{rules};
3026     if ($rules && scalar(@$rules)) {
3027         $raw .= "[RULES]\n\n";
3028         $raw .= &$format_rules($rules, 1);
3029         $raw .= "\n";
3030     }
3031
3032     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3033 }
3034
3035 sub compile {
3036     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3037
3038     my $vmfw_configs;
3039
3040     if ($vmdata) { # test mode
3041         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3042         my $filename = "$testdir/cluster.fw";
3043         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3044
3045         $filename = "$testdir/host.fw";
3046         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3047
3048         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3049     } else { # normal operation
3050         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3051
3052         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3053
3054         $vmdata = read_local_vm_config();
3055         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3056     }
3057
3058     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3059     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3060
3061     return ($ruleset, $ipset_ruleset, $rulesetv6);
3062 }
3063
3064 sub compile_iptables_filter {
3065     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3066
3067     $cluster_conf->{ipset}->{venet0} = [];
3068     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3069
3070     my $localnet;
3071     if ($cluster_conf->{aliases}->{local_network}) {
3072         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3073     } else {
3074         $localnet = local_network() || '127.0.0.0/8';
3075         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
3076     }
3077
3078     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3079
3080     return ({}, {}) if !$cluster_conf->{options}->{enable};
3081
3082     my $ruleset = {};
3083
3084     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3085     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3086
3087     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3088
3089     my $hostfw_options = $hostfw_conf->{options} || {};
3090
3091     # fixme: what log level should we use here?
3092     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3093
3094     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3095
3096
3097     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3098     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3099     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3100
3101     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3102     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3103
3104     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3105
3106     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3107     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3108
3109     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3110     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3111
3112     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3113
3114     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3115
3116     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3117
3118     my $ipset_ruleset = {};
3119
3120     # currently pveproxy don't works with ipv6, so let's generate host fw ipv4 only for the moment
3121     if ($hostfw_enable && ($ipversion == 4)) {
3122         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3123         warn $@ if $@; # just to be sure - should not happen
3124     }
3125
3126     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3127
3128     # generate firewall rules for QEMU VMs
3129     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3130         eval {
3131             my $conf = $vmdata->{qemu}->{$vmid};
3132             my $vmfw_conf = $vmfw_configs->{$vmid};
3133             return if !$vmfw_conf;
3134
3135             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3136
3137             foreach my $netid (keys %$conf) {
3138                 next if $netid !~ m/^net(\d+)$/;
3139                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3140                 next if !$net->{firewall};
3141                 my $iface = "tap${vmid}i$1";
3142
3143                 my $macaddr = $net->{macaddr};
3144                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3145                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3146                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3147                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3148             }
3149         };
3150         warn $@ if $@; # just to be sure - should not happen
3151     }
3152
3153     # generate firewall rules for OpenVZ containers
3154     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3155         eval {
3156             my $conf = $vmdata->{openvz}->{$vmid};
3157
3158             my $vmfw_conf = $vmfw_configs->{$vmid};
3159             return if !$vmfw_conf;
3160
3161             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3162
3163             if ($vmfw_conf->{options}->{enable}) {
3164                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3165                     my $ip = $conf->{ip_address}->{value};
3166                     $ip =~ s/\s+/,/g;
3167
3168                     my @ips = ();
3169
3170                     foreach my $singleip (split(',', $ip)) {
3171                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3172                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3173                         push @ips, $singleip if $singleip_ver == $ipversion;
3174                     }
3175
3176                     if (scalar(@ips)) {
3177                         my $ip_list = join(',', @ips);
3178                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3179                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3180                     }
3181                 }
3182             }
3183
3184             if ($conf->{netif} && $conf->{netif}->{value}) {
3185                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3186                 foreach my $netid (keys %$netif) {
3187                     my $d = $netif->{$netid};
3188                     my $bridge = $d->{bridge};
3189                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3190                     my $macaddr = $d->{mac};
3191                     my $iface = $d->{host_ifname};
3192                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3193                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3194                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3195                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3196                 }
3197             }
3198         };
3199         warn $@ if $@; # just to be sure - should not happen
3200     }
3201
3202     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3203         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3204     }
3205
3206     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3207
3208     return ($ruleset, $ipset_ruleset);
3209 }
3210
3211 sub get_ruleset_status {
3212     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3213
3214     my $statushash = {};
3215
3216     foreach my $chain (sort keys %$ruleset) {
3217         my $sig = &$digest_fn($ruleset->{$chain});
3218
3219         $statushash->{$chain}->{sig} = $sig;
3220
3221         my $oldsig = $active_chains->{$chain};
3222         if (!defined($oldsig)) {
3223             $statushash->{$chain}->{action} = 'create';
3224         } else {
3225             if ($oldsig eq $sig) {
3226                 $statushash->{$chain}->{action} = 'exists';
3227             } else {
3228                 $statushash->{$chain}->{action} = 'update';
3229             }
3230         }
3231         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3232         foreach my $cmd (@{$ruleset->{$chain}}) {
3233             print "\t$cmd\n" if $verbose;
3234         }
3235     }
3236
3237     foreach my $chain (sort keys %$active_chains) {
3238         if (!defined($ruleset->{$chain})) {
3239             my $sig = $active_chains->{$chain};
3240             $statushash->{$chain}->{action} = 'delete';
3241             $statushash->{$chain}->{sig} = $sig;
3242             print "delete $chain ($sig)\n" if $verbose;
3243         }
3244     }
3245
3246     return $statushash;
3247 }
3248
3249 sub print_sig_rule {
3250     my ($chain, $sig) = @_;
3251
3252     # We just use this to store a SHA1 checksum used to detect changes
3253     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3254 }
3255
3256 sub get_ruleset_cmdlist {
3257     my ($ruleset, $verbose, $iptablescmd) = @_;
3258
3259     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3260
3261     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3262     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3263
3264     # create missing chains first
3265     foreach my $chain (sort keys %$ruleset) {
3266         my $stat = $statushash->{$chain};
3267         die "internal error" if !$stat;
3268         next if $stat->{action} ne 'create';
3269
3270         $cmdlist .= ":$chain - [0:0]\n";
3271     }
3272
3273     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3274         my $chain = "PVEFW-$h";
3275         if ($ruleset->{$chain} && !$hooks->{$h}) {
3276             $cmdlist .= "-A $h -j $chain\n";
3277         }
3278     }
3279
3280     foreach my $chain (sort keys %$ruleset) {
3281         my $stat = $statushash->{$chain};
3282         die "internal error" if !$stat;
3283
3284         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3285             $cmdlist .= "-F $chain\n";
3286             foreach my $cmd (@{$ruleset->{$chain}}) {
3287                 $cmdlist .= "$cmd\n";
3288             }
3289             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3290         } elsif ($stat->{action} eq 'delete') {
3291             die "internal error"; # this should not happen
3292         } elsif ($stat->{action} eq 'exists') {
3293             # do nothing
3294         } else {
3295             die "internal error - unknown status '$stat->{action}'";
3296         }
3297     }
3298
3299     foreach my $chain (keys %$statushash) {
3300         next if $statushash->{$chain}->{action} ne 'delete';
3301         $cmdlist .= "-F $chain\n";
3302     }
3303     foreach my $chain (keys %$statushash) {
3304         next if $statushash->{$chain}->{action} ne 'delete';
3305         next if $chain eq 'PVEFW-INPUT';
3306         next if $chain eq 'PVEFW-OUTPUT';
3307         next if $chain eq 'PVEFW-FORWARD';
3308         $cmdlist .= "-X $chain\n";
3309     }
3310
3311     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3312
3313     $cmdlist .= "COMMIT\n";
3314
3315     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3316 }
3317
3318 sub get_ipset_cmdlist {
3319     my ($ruleset, $verbose) = @_;
3320
3321     my $cmdlist = "";
3322
3323     my $delete_cmdlist = "";
3324
3325     my $active_chains = ipset_get_chains();
3326     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3327
3328     # remove stale _swap chains
3329     foreach my $chain (keys %$active_chains) {
3330         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3331             $cmdlist .= "destroy $chain\n";
3332         }
3333     }
3334
3335     foreach my $chain (keys %$ruleset) {
3336         my $stat = $statushash->{$chain};
3337         die "internal error" if !$stat;
3338
3339         if ($stat->{action} eq 'create') {
3340             foreach my $cmd (@{$ruleset->{$chain}}) {
3341                 $cmdlist .= "$cmd\n";
3342             }
3343         }
3344     }
3345
3346     foreach my $chain (keys %$ruleset) {
3347         my $stat = $statushash->{$chain};
3348         die "internal error" if !$stat;
3349
3350         if ($stat->{action} eq 'update') {
3351             my $chain_swap = $chain."_swap";
3352
3353             foreach my $cmd (@{$ruleset->{$chain}}) {
3354                 $cmd =~ s/$chain/$chain_swap/;
3355                 $cmdlist .= "$cmd\n";
3356             }
3357             $cmdlist .= "swap $chain_swap $chain\n";
3358             $cmdlist .= "flush $chain_swap\n";
3359             $cmdlist .= "destroy $chain_swap\n";
3360         }
3361     }
3362
3363      # the remove unused chains
3364     foreach my $chain (keys %$statushash) {
3365         next if $statushash->{$chain}->{action} ne 'delete';
3366
3367         $delete_cmdlist .= "flush $chain\n";
3368         $delete_cmdlist .= "destroy $chain\n";
3369     }
3370
3371     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3372
3373     return ($cmdlist, $delete_cmdlist, $changes);
3374 }
3375
3376 sub apply_ruleset {
3377     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3378
3379     enable_bridge_firewall();
3380
3381     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3382         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3383
3384     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3385     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3386
3387     if ($verbose) {
3388         if ($ipset_changes) {
3389             print "ipset changes:\n";
3390             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3391             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3392         }
3393
3394         if ($changes) {
3395             print "iptables changes:\n";
3396             print $cmdlist;
3397         }
3398
3399         if ($changesv6) {
3400             print "ip6tables changes:\n";
3401             print $cmdlistv6;
3402         }
3403     }
3404
3405     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3406     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3407
3408     ipset_restore_cmdlist($ipset_create_cmdlist);
3409
3410     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3411     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3412
3413     iptables_restore_cmdlist($cmdlist);
3414
3415     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3416     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3417
3418     ip6tables_restore_cmdlist($cmdlistv6);
3419
3420     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3421     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3422
3423     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3424
3425     # test: re-read status and check if everything is up to date
3426     my $active_chains = iptables_get_chains();
3427     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3428
3429     my $errors;
3430     foreach my $chain (sort keys %$ruleset) {
3431         my $stat = $statushash->{$chain};
3432         if ($stat->{action} ne 'exists') {
3433             warn "unable to update chain '$chain'\n";
3434             $errors = 1;
3435         }
3436     }
3437
3438     my $active_chainsv6 = iptables_get_chains("ip6tables");
3439     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3440
3441     foreach my $chain (sort keys %$rulesetv6) {
3442         my $stat = $statushashv6->{$chain};
3443         if ($stat->{action} ne 'exists') {
3444             warn "unable to update chain '$chain'\n";
3445             $errors = 1;
3446         }
3447     }
3448
3449     die "unable to apply firewall changes\n" if $errors;
3450
3451     update_nf_conntrack_max($hostfw_conf);
3452
3453     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3454
3455 }
3456
3457 sub update_nf_conntrack_max {
3458     my ($hostfw_conf) = @_;
3459
3460     my $max = 65536; # reasonable default
3461
3462     my $options = $hostfw_conf->{options} || {};
3463
3464     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3465         $max = $options->{nf_conntrack_max};
3466         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3467     }
3468
3469     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3470     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3471
3472     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3473
3474     if ($current != $max) {
3475         my $hashsize = int($max/4);
3476         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3477         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3478     }
3479 }
3480
3481 sub update_nf_conntrack_tcp_timeout_established {
3482     my ($hostfw_conf) = @_;
3483
3484     my $options = $hostfw_conf->{options} || {};
3485
3486     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3487
3488     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3489 }
3490
3491 sub remove_pvefw_chains {
3492
3493     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3494     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3495     PVE::Firewall::remove_pvefw_chains_ipset();
3496
3497 }
3498
3499 sub remove_pvefw_chains_iptables {
3500     my ($iptablescmd) = @_;
3501
3502     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3503     my $cmdlist = "*filter\n";
3504
3505     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3506         if ($hooks->{$h}) {
3507             $cmdlist .= "-D $h -j PVEFW-$h\n";
3508         }
3509     }
3510
3511     foreach my $chain (keys %$chash) {
3512         $cmdlist .= "-F $chain\n";
3513     }
3514
3515     foreach my $chain (keys %$chash) {
3516         $cmdlist .= "-X $chain\n";
3517     }
3518     $cmdlist .= "COMMIT\n";
3519
3520     if($iptablescmd eq "ip6tables") {
3521         ip6tables_restore_cmdlist($cmdlist);
3522     } else {
3523         iptables_restore_cmdlist($cmdlist);
3524     }
3525 }
3526
3527 sub remove_pvefw_chains_ipset {
3528
3529     my $ipset_chains = ipset_get_chains();
3530
3531     my $cmdlist = "";
3532
3533     foreach my $chain (keys %$ipset_chains) {
3534         $cmdlist .= "flush $chain\n";
3535         $cmdlist .= "destroy $chain\n";
3536     }
3537
3538     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3539 }
3540
3541 sub init {
3542     my $cluster_conf = load_clusterfw_conf();
3543     my $cluster_options = $cluster_conf->{options};
3544     my $enable = $cluster_options->{enable};
3545
3546     return if !$enable;
3547
3548     # load required modules here
3549 }
3550
3551 sub update {
3552     my $code = sub {
3553
3554         my $cluster_conf = load_clusterfw_conf();
3555         my $cluster_options = $cluster_conf->{options};
3556
3557         if (!$cluster_options->{enable}) {
3558             PVE::Firewall::remove_pvefw_chains();
3559             return;
3560         }
3561
3562         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3563
3564         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3565
3566         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3567     };
3568
3569     run_locked($code);
3570 }
3571
3572 1;