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