src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 149     ],
 150     'Trcrt' => [
 151         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 152         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 153     ],
 154  };
 155
 156 # imported/converted from: /usr/share/shorewall/macro.*
 157 my $pve_fw_macros = {
 158     'Amanda' => [
 159         "Amanda Backup",
 160         { action => 'PARAM', proto => 'udp', dport => '10080' },
 161         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 162     ],
 163     'Auth' => [
 164         "Auth (identd) traffic",
 165         { action => 'PARAM', proto => 'tcp', dport => '113' },
 166     ],
 167     'BGP' => [
 168         "Border Gateway Protocol traffic",
 169         { action => 'PARAM', proto => 'tcp', dport => '179' },
 170     ],
 171     'BitTorrent' => [
 172         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 173         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 174         { action => 'PARAM', proto => 'udp', dport => '6881' },
 175     ],
 176     'BitTorrent32' => [
 177         "BitTorrent traffic for BitTorrent 3.2 and later",
 178         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 179         { action => 'PARAM', proto => 'udp', dport => '6881' },
 180     ],
 181     'CVS' => [
 182         "Concurrent Versions System pserver traffic",
 183         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 184     ],
 185     'Citrix' => [
 186         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 187         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 188         { action => 'PARAM', proto => 'udp', dport => '1604' },
 189         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 190     ],
 191     'DAAP' => [
 192         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 193         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 194         { action => 'PARAM', proto => 'udp', dport => '3689' },
 195     ],
 196     'DCC' => [
 197         "Distributed Checksum Clearinghouse spam filtering mechanism",
 198         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 199     ],
 200     'DHCPfwd' => [
 201         "Forwarded DHCP traffic",
 202         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 203     ],
 204     'DNS' => [
 205         "Domain Name System traffic (upd and tcp)",
 206         { action => 'PARAM', proto => 'udp', dport => '53' },
 207         { action => 'PARAM', proto => 'tcp', dport => '53' },
 208     ],
 209     'Distcc' => [
 210         "Distributed Compiler service",
 211         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 212     ],
 213     'FTP' => [
 214         "File Transfer Protocol",
 215         { action => 'PARAM', proto => 'tcp', dport => '21' },
 216     ],
 217     'Finger' => [
 218         "Finger protocol (RFC 742)",
 219         { action => 'PARAM', proto => 'tcp', dport => '79' },
 220     ],
 221     'GNUnet' => [
 222         "GNUnet secure peer-to-peer networking traffic",
 223         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 224         { action => 'PARAM', proto => 'udp', dport => '2086' },
 225         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 226         { action => 'PARAM', proto => 'udp', dport => '1080' },
 227     ],
 228     'GRE' => [
 229         "Generic Routing Encapsulation tunneling protocol",
 230         { action => 'PARAM', proto => '47' },
 231     ],
 232     'Git' => [
 233         "Git distributed revision control traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 235     ],
 236     'HKP' => [
 237         "OpenPGP HTTP keyserver protocol traffic",
 238         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 239     ],
 240     'HTTP' => [
 241         "Hypertext Transfer Protocol (WWW)",
 242         { action => 'PARAM', proto => 'tcp', dport => '80' },
 243     ],
 244     'HTTPS' => [
 245         "Hypertext Transfer Protocol (WWW) over SSL",
 246         { action => 'PARAM', proto => 'tcp', dport => '443' },
 247     ],
 248     'ICPV2' => [
 249         "Internet Cache Protocol V2 (Squid) traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '3130' },
 251     ],
 252     'ICQ' => [
 253         "AOL Instant Messenger traffic",
 254         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 255     ],
 256     'IMAP' => [
 257         "Internet Message Access Protocol",
 258         { action => 'PARAM', proto => 'tcp', dport => '143' },
 259     ],
 260     'IMAPS' => [
 261         "Internet Message Access Protocol over SSL",
 262         { action => 'PARAM', proto => 'tcp', dport => '993' },
 263     ],
 264     'IPIP' => [
 265         "IPIP capsulation traffic",
 266         { action => 'PARAM', proto => '94' },
 267     ],
 268     'IPsec' => [
 269         "IPsec traffic",
 270         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 271         { action => 'PARAM', proto => '50' },
 272     ],
 273     'IPsecah' => [
 274         "IPsec authentication (AH) traffic",
 275         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 276         { action => 'PARAM', proto => '51' },
 277     ],
 278     'IPsecnat' => [
 279         "IPsec traffic and Nat-Traversal",
 280         { action => 'PARAM', proto => 'udp', dport => '500' },
 281         { action => 'PARAM', proto => 'udp', dport => '4500' },
 282         { action => 'PARAM', proto => '50' },
 283     ],
 284     'IRC' => [
 285         "Internet Relay Chat traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 287     ],
 288     'Jetdirect' => [
 289         "HP Jetdirect printing",
 290         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 291     ],
 292     'L2TP' => [
 293         "Layer 2 Tunneling Protocol traffic",
 294         { action => 'PARAM', proto => 'udp', dport => '1701' },
 295     ],
 296     'LDAP' => [
 297         "Lightweight Directory Access Protocol traffic",
 298         { action => 'PARAM', proto => 'tcp', dport => '389' },
 299     ],
 300     'LDAPS' => [
 301         "Secure Lightweight Directory Access Protocol traffic",
 302         { action => 'PARAM', proto => 'tcp', dport => '636' },
 303     ],
 304     'MSNP' => [
 305         "Microsoft Notification Protocol",
 306         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 307     ],
 308     'MSSQL' => [
 309         "Microsoft SQL Server",
 310         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 311     ],
 312     'Mail' => [
 313         "Mail traffic (SMTP, SMTPS, Submission)",
 314         { action => 'PARAM', proto => 'tcp', dport => '25' },
 315         { action => 'PARAM', proto => 'tcp', dport => '465' },
 316         { action => 'PARAM', proto => 'tcp', dport => '587' },
 317     ],
 318     'Munin' => [
 319         "Munin networked resource monitoring traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 321     ],
 322     'MySQL' => [
 323         "MySQL server",
 324         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 325     ],
 326     'NNTP' => [
 327         "NNTP traffic (Usenet).",
 328         { action => 'PARAM', proto => 'tcp', dport => '119' },
 329     ],
 330     'NNTPS' => [
 331         "Encrypted NNTP traffic (Usenet)",
 332         { action => 'PARAM', proto => 'tcp', dport => '563' },
 333     ],
 334     'NTP' => [
 335         "Network Time Protocol (ntpd)",
 336         { action => 'PARAM', proto => 'udp', dport => '123' },
 337     ],
 338     'OSPF' => [
 339         "OSPF multicast traffic",
 340         { action => 'PARAM', proto => '89' },
 341     ],
 342     'OpenVPN' => [
 343         "OpenVPN traffic",
 344         { action => 'PARAM', proto => 'udp', dport => '1194' },
 345     ],
 346     'PCA' => [
 347         "Symantec PCAnywere (tm)",
 348         { action => 'PARAM', proto => 'udp', dport => '5632' },
 349         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 350     ],
 351     'POP3' => [
 352         "POP3 traffic",
 353         { action => 'PARAM', proto => 'tcp', dport => '110' },
 354     ],
 355     'POP3S' => [
 356         "Encrypted POP3 traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '995' },
 358     ],
 359     'PPtP' => [
 360         "Point-to-Point Tunneling Protocol",
 361         { action => 'PARAM', proto => '47' },
 362         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 363     ],
 364     'Ping' => [
 365         "ICMP echo request",
 366         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 367     ],
 368     'PostgreSQL' => [
 369         "PostgreSQL server",
 370         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 371     ],
 372     'Printer' => [
 373         "Line Printer protocol printing",
 374         { action => 'PARAM', proto => 'tcp', dport => '515' },
 375     ],
 376     'RDP' => [
 377         "Microsoft Remote Desktop Protocol traffic",
 378         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 379     ],
 380     'RIP' => [
 381         "Routing Information Protocol (bidirectional)",
 382         { action => 'PARAM', proto => 'udp', dport => '520' },
 383     ],
 384     'RNDC' => [
 385         "BIND remote management protocol",
 386         { action => 'PARAM', proto => 'tcp', dport => '953' },
 387     ],
 388     'Razor' => [
 389         "Razor Antispam System",
 390         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 391     ],
 392     'Rdate' => [
 393         "Remote time retrieval (rdate)",
 394         { action => 'PARAM', proto => 'tcp', dport => '37' },
 395     ],
 396     'Rsync' => [
 397         "Rsync server",
 398         { action => 'PARAM', proto => 'tcp', dport => '873' },
 399     ],
 400     'SANE' => [
 401         "SANE network scanning",
 402         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 403     ],
 404     'SMB' => [
 405         "Microsoft SMB traffic",
 406         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 407         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 408         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 409         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 410     ],
 411     'SMBswat' => [
 412         "Samba Web Administration Tool",
 413         { action => 'PARAM', proto => 'tcp', dport => '901' },
 414     ],
 415     'SMTP' => [
 416         "Simple Mail Transfer Protocol",
 417         { action => 'PARAM', proto => 'tcp', dport => '25' },
 418     ],
 419     'SMTPS' => [
 420         "Encrypted Simple Mail Transfer Protocol",
 421         { action => 'PARAM', proto => 'tcp', dport => '465' },
 422     ],
 423     'SNMP' => [
 424         "Simple Network Management Protocol",
 425         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 426         { action => 'PARAM', proto => 'tcp', dport => '161' },
 427     ],
 428     'SPAMD' => [
 429         "Spam Assassin SPAMD traffic",
 430         { action => 'PARAM', proto => 'tcp', dport => '783' },
 431     ],
 432     'SSH' => [
 433         "Secure shell traffic",
 434         { action => 'PARAM', proto => 'tcp', dport => '22' },
 435     ],
 436     'SVN' => [
 437         "Subversion server (svnserve)",
 438         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 439     ],
 440     'SixXS' => [
 441         "SixXS IPv6 Deployment and Tunnel Broker",
 442         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 443         { action => 'PARAM', proto => 'udp', dport => '3740' },
 444         { action => 'PARAM', proto => '41' },
 445         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 446     ],
 447     'Squid' => [
 448         "Squid web proxy traffic",
 449         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 450     ],
 451     'Submission' => [
 452         "Mail message submission traffic",
 453         { action => 'PARAM', proto => 'tcp', dport => '587' },
 454     ],
 455     'Syslog' => [
 456         "Syslog protocol (RFC 5424) traffic",
 457         { action => 'PARAM', proto => 'udp', dport => '514' },
 458         { action => 'PARAM', proto => 'tcp', dport => '514' },
 459     ],
 460     'TFTP' => [
 461         "Trivial File Transfer Protocol traffic",
 462         { action => 'PARAM', proto => 'udp', dport => '69' },
 463     ],
 464     'Telnet' => [
 465         "Telnet traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '23' },
 467     ],
 468     'Telnets' => [
 469         "Telnet over SSL",
 470         { action => 'PARAM', proto => 'tcp', dport => '992' },
 471     ],
 472     'Time' => [
 473         "RFC 868 Time protocol",
 474         { action => 'PARAM', proto => 'tcp', dport => '37' },
 475     ],
 476     'Trcrt' => [
 477         "Traceroute (for up to 30 hops) traffic",
 478         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 479         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 480     ],
 481     'VNC' => [
 482         "VNC traffic for VNC display's 0 - 99",
 483         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 484     ],
 485     'VNCL' => [
 486         "VNC traffic from Vncservers to Vncviewers in listen mode",
 487         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 488     ],
 489     'Web' => [
 490         "WWW traffic (HTTP and HTTPS)",
 491         { action => 'PARAM', proto => 'tcp', dport => '80' },
 492         { action => 'PARAM', proto => 'tcp', dport => '443' },
 493     ],
 494     'Webcache' => [
 495         "Web Cache/Proxy traffic (port 8080)",
 496         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 497     ],
 498     'Webmin' => [
 499         "Webmin traffic",
 500         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 501     ],
 502     'Whois' => [
 503         "Whois (nicname, RFC 3912) traffic",
 504         { action => 'PARAM', proto => 'tcp', dport => '43' },
 505     ],
 506 };
 507
 508 my $pve_fw_parsed_macros;
 509 my $pve_fw_macro_descr;
 510 my $pve_fw_macro_ipversion = {};
 511 my $pve_fw_preferred_macro_names = {};
 512
 513 my $pve_std_chains = {};
 514 $pve_std_chains->{4} = {
 515     'PVEFW-SET-ACCEPT-MARK' => [
 516         "-j MARK --set-mark 1",
 517     ],
 518     'PVEFW-DropBroadcast' => [
 519         # same as shorewall 'Broadcast'
 520         # simply DROP BROADCAST/MULTICAST/ANYCAST
 521         # we can use this to reduce logging
 522         { action => 'DROP', dsttype => 'BROADCAST' },
 523         { action => 'DROP', dsttype => 'MULTICAST' },
 524         { action => 'DROP', dsttype => 'ANYCAST' },
 525         { action => 'DROP', dest => '224.0.0.0/4' },
 526     ],
 527     'PVEFW-reject' => [
 528         # same as shorewall 'reject'
 529         { action => 'DROP', dsttype => 'BROADCAST' },
 530         { action => 'DROP', source => '224.0.0.0/4' },
 531         { action => 'DROP', proto => 'icmp' },
 532         "-p tcp -j REJECT --reject-with tcp-reset",
 533         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 534         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 535         "-j REJECT --reject-with icmp-host-prohibited",
 536     ],
 537     'PVEFW-Drop' => [
 538         # same as shorewall 'Drop', which is equal to DROP,
 539         # but REJECT/DROP some packages to reduce logging,
 540         # and ACCEPT critical ICMP types
 541         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 542         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 543         { action => 'PVEFW-DropBroadcast' },
 544         # ACCEPT critical ICMP types
 545         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 547         # Drop packets with INVALID state
 548         "-m conntrack --ctstate INVALID -j DROP",
 549         # Drop Microsoft SMB noise
 550         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 551         { action => 'DROP', proto => 'udp', dport => '137:139'},
 552         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 553         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 554         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 555         # Drop new/NotSyn traffic so that it doesn't get logged
 556         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 557         # Drop DNS replies
 558         { action => 'DROP', proto => 'udp', sport => 53 },
 559     ],
 560     'PVEFW-Reject' => [
 561         # same as shorewall 'Reject', which is equal to Reject,
 562         # but REJECT/DROP some packages to reduce logging,
 563         # and ACCEPT critical ICMP types
 564         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 565         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 566         { action => 'PVEFW-DropBroadcast' },
 567         # ACCEPT critical ICMP types
 568         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 569         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 570         # Drop packets with INVALID state
 571         "-m conntrack --ctstate INVALID -j DROP",
 572         # Drop Microsoft SMB noise
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 574         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 575         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 576         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 577         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 578         # Drop new/NotSyn traffic so that it doesn't get logged
 579         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 580         # Drop DNS replies
 581         { action => 'DROP', proto => 'udp', sport => 53 },
 582     ],
 583     'PVEFW-tcpflags' => [
 584         # same as shorewall tcpflags action.
 585         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 586         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 588         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 589         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 590         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 591     ],
 592     'PVEFW-smurfs' => [
 593         # same as shorewall smurfs action
 594         # Filter packets for smurfs (packets with a broadcast address as the source).
 595         "-s 0.0.0.0/32 -j RETURN",
 596         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 597         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 598     ],
 599 };
 600
 601 $pve_std_chains->{6} = {
 602     'PVEFW-SET-ACCEPT-MARK' => [
 603         "-j MARK --set-mark 1",
 604     ],
 605     'PVEFW-DropBroadcast' => [
 606         # same as shorewall 'Broadcast'
 607         # simply DROP BROADCAST/MULTICAST/ANYCAST
 608         # we can use this to reduce logging
 609         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 610         # ipv6 addrtype does not work with kernel 2.6.32
 611         #{ action => 'DROP', dsttype => 'MULTICAST' },
 612         #{ action => 'DROP', dsttype => 'ANYCAST' },
 613         { action => 'DROP', dest => 'ff00::/8' },
 614         #{ action => 'DROP', dest => '224.0.0.0/4' },
 615     ],
 616     'PVEFW-reject' => [
 617         # same as shorewall 'reject'
 618         #{ action => 'DROP', dsttype => 'BROADCAST' },
 619         #{ action => 'DROP', source => '224.0.0.0/4' },
 620         { action => 'DROP', proto => 'icmpv6' },
 621         "-p tcp -j REJECT --reject-with tcp-reset",
 622         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 623         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 624         #"-j REJECT --reject-with icmp-host-prohibited",
 625     ],
 626     'PVEFW-Drop' => [
 627         # same as shorewall 'Drop', which is equal to DROP,
 628         # but REJECT/DROP some packages to reduce logging,
 629         # and ACCEPT critical ICMP types
 630         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 631         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 632         { action => 'PVEFW-DropBroadcast' },
 633         # ACCEPT critical ICMP types
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 635         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 636         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 637
 638         # Drop packets with INVALID state
 639         "-m conntrack --ctstate INVALID -j DROP",
 640         # Drop Microsoft SMB noise
 641         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 642         { action => 'DROP', proto => 'udp', dport => '137:139'},
 643         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 644         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 645         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 646         # Drop new/NotSyn traffic so that it doesn't get logged
 647         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 648         # Drop DNS replies
 649         { action => 'DROP', proto => 'udp', sport => 53 },
 650     ],
 651     'PVEFW-Reject' => [
 652         # same as shorewall 'Reject', which is equal to Reject,
 653         # but REJECT/DROP some packages to reduce logging,
 654         # and ACCEPT critical ICMP types
 655         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 656         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 657         { action => 'PVEFW-DropBroadcast' },
 658         # ACCEPT critical ICMP types
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 660         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 661         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 662
 663         # Drop packets with INVALID state
 664         "-m conntrack --ctstate INVALID -j DROP",
 665         # Drop Microsoft SMB noise
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 667         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 668         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 669         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 670         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 671         # Drop new/NotSyn traffic so that it doesn't get logged
 672         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 673         # Drop DNS replies
 674         { action => 'DROP', proto => 'udp', sport => 53 },
 675     ],
 676     'PVEFW-tcpflags' => [
 677         # same as shorewall tcpflags action.
 678         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 679         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 681         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 682         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 683         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 684     ],
 685 };
 686
 687 # iptables -p icmp -h
 688 my $icmp_type_names = {
 689     any => 1,
 690     'echo-reply' => 1,
 691     'destination-unreachable' => 1,
 692     'network-unreachable' => 1,
 693     'host-unreachable' => 1,
 694     'protocol-unreachable' => 1,
 695     'port-unreachable' => 1,
 696     'fragmentation-needed' => 1,
 697     'source-route-failed' => 1,
 698     'network-unknown' => 1,
 699     'host-unknown' => 1,
 700     'network-prohibited' => 1,
 701     'host-prohibited' => 1,
 702     'TOS-network-unreachable' => 1,
 703     'TOS-host-unreachable' => 1,
 704     'communication-prohibited' => 1,
 705     'host-precedence-violation' => 1,
 706     'precedence-cutoff' => 1,
 707     'source-quench' => 1,
 708     'redirect' => 1,
 709     'network-redirect' => 1,
 710     'host-redirect' => 1,
 711     'TOS-network-redirect' => 1,
 712     'TOS-host-redirect' => 1,
 713     'echo-request' => 1,
 714     'router-advertisement' => 1,
 715     'router-solicitation' => 1,
 716     'time-exceeded' => 1,
 717     'ttl-zero-during-transit' => 1,
 718     'ttl-zero-during-reassembly' => 1,
 719     'parameter-problem' => 1,
 720     'ip-header-bad' => 1,
 721     'required-option-missing' => 1,
 722     'timestamp-request' => 1,
 723     'timestamp-reply' => 1,
 724     'address-mask-request' => 1,
 725     'address-mask-reply' => 1,
 726 };
 727
 728 # ip6tables -p icmpv6 -h
 729
 730 my $icmpv6_type_names = {
 731     'any' => 1,
 732     'destination-unreachable' => 1,
 733     'no-route' => 1,
 734     'communication-prohibited' => 1,
 735     'address-unreachable' => 1,
 736     'port-unreachable' => 1,
 737     'packet-too-big' => 1,
 738     'time-exceeded' => 1,
 739     'ttl-zero-during-transit' => 1,
 740     'ttl-zero-during-reassembly' => 1,
 741     'parameter-problem' => 1,
 742     'bad-header' => 1,
 743     'unknown-header-type' => 1,
 744     'unknown-option' => 1,
 745     'echo-request' => 1,
 746     'echo-reply' => 1,
 747     'router-solicitation' => 1,
 748     'router-advertisement' => 1,
 749     'neighbor-solicitation' => 1,
 750     'neighbour-solicitation' => 1,
 751     'neighbor-advertisement' => 1,
 752     'neighbour-advertisement' => 1,
 753     'redirect' => 1,
 754 };
 755
 756 sub init_firewall_macros {
 757
 758     $pve_fw_parsed_macros = {};
 759
 760     my $parse = sub {
 761         my ($k, $macro) = @_;
 762         my $lc_name = lc($k);
 763         $pve_fw_macro_ipversion->{$k} = 0;
 764         while (!ref($macro->[0])) {
 765             my $desc = shift @$macro;
 766             if ($desc eq 'ipv4only') {
 767                 $pve_fw_macro_ipversion->{$k} = 4;
 768             } elsif ($desc eq 'ipv6only') {
 769                 $pve_fw_macro_ipversion->{$k} = 6;
 770             } else {
 771                 $pve_fw_macro_descr->{$k} = $desc;
 772             }
 773         }
 774         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 775         $pve_fw_parsed_macros->{$k} = $macro;
 776     };
 777
 778     foreach my $k (keys %$pve_fw_macros) {
 779         &$parse($k, $pve_fw_macros->{$k});
 780     }
 781
 782     foreach my $k (keys %$pve_ipv6fw_macros) {
 783         next if $pve_fw_parsed_macros->{$k};
 784         &$parse($k, $pve_ipv6fw_macros->{$k});
 785         $pve_fw_macro_ipversion->{$k} = 6;
 786     }
 787 }
 788
 789 init_firewall_macros();
 790
 791 sub get_macros {
 792     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 793 }
 794
 795 my $etc_services;
 796
 797 sub get_etc_services {
 798
 799     return $etc_services if $etc_services;
 800
 801     my $filename = "/etc/services";
 802
 803     my $fh = IO::File->new($filename, O_RDONLY);
 804     if (!$fh) {
 805         warn "unable to read '$filename' - $!\n";
 806         return {};
 807     }
 808
 809     my $services = {};
 810
 811     while (my $line = <$fh>) {
 812         chomp ($line);
 813         next if $line =~m/^#/;
 814         next if ($line =~m/^\s*$/);
 815
 816         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 817             $services->{byid}->{$2}->{name} = $1;
 818             $services->{byid}->{$2}->{port} = $2;
 819             $services->{byid}->{$2}->{$3} = 1;
 820             $services->{byname}->{$1} = $services->{byid}->{$2};
 821         }
 822     }
 823
 824     close($fh);
 825
 826     $etc_services = $services;
 827
 828
 829     return $etc_services;
 830 }
 831
 832 my $etc_protocols;
 833
 834 sub get_etc_protocols {
 835     return $etc_protocols if $etc_protocols;
 836
 837     my $filename = "/etc/protocols";
 838
 839     my $fh = IO::File->new($filename, O_RDONLY);
 840     if (!$fh) {
 841         warn "unable to read '$filename' - $!\n";
 842         return {};
 843     }
 844
 845     my $protocols = {};
 846
 847     while (my $line = <$fh>) {
 848         chomp ($line);
 849         next if $line =~m/^#/;
 850         next if ($line =~m/^\s*$/);
 851
 852         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 853             $protocols->{byid}->{$2}->{name} = $1;
 854             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 855         }
 856     }
 857
 858     close($fh);
 859
 860     # add special case for ICMP v6
 861     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 862     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 863
 864     $etc_protocols = $protocols;
 865
 866     return $etc_protocols;
 867 }
 868
 869 my $ipv4_mask_hash_localnet = {
 870     '255.255.0.0' => 16,
 871     '255.255.128.0' => 17,
 872     '255.255.192.0' => 18,
 873     '255.255.224.0' => 19,
 874     '255.255.240.0' => 20,
 875     '255.255.248.0' => 21,
 876     '255.255.252.0' => 22,
 877     '255.255.254.0' => 23,
 878     '255.255.255.0' => 24,
 879     '255.255.255.128' => 25,
 880     '255.255.255.192' => 26,
 881     '255.255.255.224' => 27,
 882     '255.255.255.240' => 28,
 883     '255.255.255.248' => 29,
 884     '255.255.255.252' => 30,
 885 };
 886
 887 my $__local_network;
 888
 889 sub local_network {
 890     my ($new_value) = @_;
 891
 892     $__local_network = $new_value if defined($new_value);
 893
 894     return $__local_network if defined($__local_network);
 895
 896     eval {
 897         my $nodename = PVE::INotify::nodename();
 898
 899         my $ip = PVE::Cluster::remote_node_ip($nodename);
 900
 901         my $testip = Net::IP->new($ip);
 902
 903         my $routes = PVE::ProcFSTools::read_proc_net_route();
 904         foreach my $entry (@$routes) {
 905             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 906             next if !defined($mask);
 907             return if $mask eq '0.0.0.0';
 908             my $cidr = "$entry->{dest}/$mask";
 909             my $testnet = Net::IP->new($cidr);
 910             if ($testnet->overlaps($testip)) {
 911                 $__local_network = $cidr;
 912                 return;
 913             }
 914         }
 915     };
 916     warn $@ if $@;
 917
 918     return $__local_network;
 919 }
 920
 921 # ipset names are limited to 31 characters,
 922 # and we use '-v4' or '-v6' to indicate IP versions,
 923 # and we use '_swap' suffix for atomic update,
 924 # for example PVEFW-${VMID}-${ipset_name}_swap
 925
 926 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 927
 928 sub compute_ipset_chain_name {
 929     my ($vmid, $ipset_name, $ipversion) = @_;
 930
 931     $vmid = 0 if !defined($vmid);
 932
 933     my $id = "$vmid-${ipset_name}-v$ipversion";
 934
 935     if (length($id) > $max_iptables_ipset_name_length) {
 936         $id = PVE::Tools::fnv31a_hex($id);
 937     }
 938
 939     return "PVEFW-$id";
 940 }
 941
 942 sub compute_ipfilter_ipset_name {
 943     my ($iface) = @_;
 944
 945     return "ipfilter-$iface";
 946 }
 947
 948 sub parse_address_list {
 949     my ($str) = @_;
 950
 951     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 952         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 953         return;
 954     }
 955
 956     if ($str =~ m/^${ip_alias_pattern}$/) {
 957         die "alias name too long\n" if length($str) > $max_alias_name_length;
 958         return;
 959     }
 960
 961     my $count = 0;
 962     my $iprange = 0;
 963     my $ipversion;
 964
 965     foreach my $elem (split(/,/, $str)) {
 966         $count++;
 967         my $ip = Net::IP->new($elem);
 968         if (!$ip) {
 969             my $err = Net::IP::Error();
 970             die "invalid IP address: $err\n";
 971         }
 972         $iprange = 1 if $elem =~ m/-/;
 973
 974         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 975
 976         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 977             if $ipversion && ($new_ipversion != $ipversion);
 978
 979         $ipversion = $new_ipversion;
 980     }
 981
 982     die "you can't use a range in a list\n" if $iprange && $count > 1;
 983
 984     return $ipversion;
 985 }
 986
 987 sub parse_port_name_number_or_range {
 988     my ($str) = @_;
 989
 990     my $services = PVE::Firewall::get_etc_services();
 991     my $count = 0;
 992     my $icmp_port = 0;
 993
 994     foreach my $item (split(/,/, $str)) {
 995         $count++;
 996         if ($item =~ m/^(\d+):(\d+)$/) {
 997             my ($port1, $port2) = ($1, $2);
 998             die "invalid port '$port1'\n" if $port1 > 65535;
 999             die "invalid port '$port2'\n" if $port2 > 65535;
1000         } elsif ($item =~ m/^(\d+)$/) {
1001             my $port = $1;
1002             die "invalid port '$port'\n" if $port > 65535;
1003         } else {
1004             if ($icmp_type_names->{$item}) {
1005                 $icmp_port = 1;
1006             } elsif ($icmpv6_type_names->{$item}) {
1007                 $icmp_port = 1;
1008             } else {
1009                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1010             }
1011         }
1012     }
1013
1014     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1015
1016     return $count;
1017 }
1018
1019 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
1020 sub pve_fw_verify_port_spec {
1021    my ($portstr) = @_;
1022
1023    parse_port_name_number_or_range($portstr);
1024
1025    return $portstr;
1026 }
1027
1028 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1029 sub pve_fw_verify_addr_spec {
1030    my ($list) = @_;
1031
1032    parse_address_list($list);
1033
1034    return $list;
1035 }
1036
1037 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1038 sub pve_fw_verify_protocol_spec {
1039    my ($proto) = @_;
1040
1041    my $protocols = get_etc_protocols();
1042
1043    die "unknown protocol '$proto'\n" if $proto &&
1044        !(defined($protocols->{byname}->{$proto}) ||
1045          defined($protocols->{byid}->{$proto}));
1046
1047    return $proto;
1048 }
1049
1050
1051 # helper function for API
1052
1053 sub copy_opject_with_digest {
1054     my ($object) = @_;
1055
1056     my $sha = Digest::SHA->new('sha1');
1057
1058     my $res = {};
1059     foreach my $k (sort keys %$object) {
1060         my $v = $object->{$k};
1061         next if !defined($v);
1062         $res->{$k} = $v;
1063         $sha->add($k, ':', $v, "\n");
1064     }
1065
1066     my $digest = $sha->hexdigest;
1067
1068     $res->{digest} = $digest;
1069
1070     return wantarray ? ($res, $digest) : $res;
1071 }
1072
1073 sub copy_list_with_digest {
1074     my ($list) = @_;
1075
1076     my $sha = Digest::SHA->new('sha1');
1077
1078     my $res = [];
1079     foreach my $entry (@$list) {
1080         my $data = {};
1081         foreach my $k (sort keys %$entry) {
1082             my $v = $entry->{$k};
1083             next if !defined($v);
1084             $data->{$k} = $v;
1085             # Note: digest ignores refs ($rule->{errors})
1086             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1087         }
1088         push @$res, $data;
1089     }
1090
1091     my $digest = $sha->hexdigest;
1092
1093     foreach my $entry (@$res) {
1094         $entry->{digest} = $digest;
1095     }
1096
1097     return wantarray ? ($res, $digest) : $res;
1098 }
1099
1100 my $rule_properties = {
1101     pos => {
1102         description => "Update rule at position <pos>.",
1103         type => 'integer',
1104         minimum => 0,
1105         optional => 1,
1106     },
1107     digest => get_standard_option('pve-config-digest'),
1108     type => {
1109         type => 'string',
1110         optional => 1,
1111         enum => ['in', 'out', 'group'],
1112     },
1113     action => {
1114         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1115         type => 'string',
1116         optional => 1,
1117         pattern => $security_group_name_pattern,
1118         maxLength => 20,
1119         minLength => 2,
1120     },
1121     macro => {
1122         type => 'string',
1123         optional => 1,
1124         maxLength => 128,
1125     },
1126     iface => get_standard_option('pve-iface', { optional => 1 }),
1127     source => {
1128         type => 'string', format => 'pve-fw-addr-spec',
1129         optional => 1,
1130     },
1131     dest => {
1132         type => 'string', format => 'pve-fw-addr-spec',
1133         optional => 1,
1134     },
1135     proto => {
1136         type => 'string', format => 'pve-fw-protocol-spec',
1137         optional => 1,
1138     },
1139     enable => {
1140         type => 'boolean',
1141         optional => 1,
1142     },
1143     sport => {
1144         type => 'string', format => 'pve-fw-port-spec',
1145         optional => 1,
1146     },
1147     dport => {
1148         type => 'string', format => 'pve-fw-port-spec',
1149         optional => 1,
1150     },
1151     comment => {
1152         type => 'string',
1153         optional => 1,
1154     },
1155 };
1156
1157 sub add_rule_properties {
1158     my ($properties) = @_;
1159
1160     foreach my $k (keys %$rule_properties) {
1161         my $h = $rule_properties->{$k};
1162         # copy data, so that we can modify later without side effects
1163         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1164     }
1165
1166     return $properties;
1167 }
1168
1169 sub delete_rule_properties {
1170     my ($rule, $delete_str) = @_;
1171
1172     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1173         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1174             if !defined($rule_properties->{$opt});
1175         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1176             if $opt eq 'type' || $opt eq 'action';
1177         delete $rule->{$opt};
1178     }
1179
1180     return $rule;
1181 }
1182
1183 my $apply_macro = sub {
1184     my ($macro_name, $param, $verify, $ipversion) = @_;
1185
1186     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1187     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1188
1189     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1190         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1191     }
1192
1193     # skip macros which are specific to another ipversion
1194     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1195         return if $ipversion != $required;
1196     }
1197
1198     my $rules = [];
1199
1200     foreach my $templ (@$macro_rules) {
1201         my $rule = {};
1202         my $param_used = {};
1203         foreach my $k (keys %$templ) {
1204             my $v = $templ->{$k};
1205             if ($v eq 'PARAM') {
1206                 $v = $param->{$k};
1207                 $param_used->{$k} = 1;
1208             } elsif ($v eq 'DEST') {
1209                 $v = $param->{dest};
1210                 $param_used->{dest} = 1;
1211             } elsif ($v eq 'SOURCE') {
1212                 $v = $param->{source};
1213                 $param_used->{source} = 1;
1214             }
1215
1216             if (!defined($v)) {
1217                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1218                 raise_param_exc({ macro => $msg }) if $verify;
1219                 die "$msg\n";
1220             }
1221             $rule->{$k} = $v;
1222         }
1223         foreach my $k (keys %$param) {
1224             next if $k eq 'macro';
1225             next if !defined($param->{$k});
1226             next if $param_used->{$k};
1227             if (defined($rule->{$k})) {
1228                 if ($rule->{$k} ne $param->{$k}) {
1229                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1230                     raise_param_exc({ $k => $msg }) if $verify;
1231                     die "$msg\n";
1232                 }
1233             } else {
1234                 $rule->{$k} = $param->{$k};
1235             }
1236         }
1237         push @$rules, $rule;
1238     }
1239
1240     return $rules;
1241 };
1242
1243 my $rule_env_iface_lookup = {
1244     'ct' => 1,
1245     'vm' => 1,
1246     'group' => 0,
1247     'cluster' => 1,
1248     'host' => 1,
1249 };
1250
1251 sub verify_rule {
1252     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1253
1254     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1255
1256     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1257     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1258
1259     my $errors = $rule->{errors} || {};
1260
1261     my $error_count = 0;
1262
1263     my $add_error = sub {
1264         my ($param, $msg)  = @_;
1265         chomp $msg;
1266         raise_param_exc({ $param => $msg }) if !$noerr;
1267         $error_count++;
1268         $errors->{$param} = $msg if !$errors->{$param};
1269     };
1270
1271     my $ipversion;
1272     my $set_ip_version = sub {
1273         my $vers = shift;
1274         if ($vers) {
1275             die "detected mixed ipv4/ipv6 adresses in rule\n"
1276                 if $ipversion && ($vers != $ipversion);
1277             $ipversion = $vers;
1278         }
1279     };
1280
1281     my $check_ipset_or_alias_property = sub {
1282         my ($name, $expected_ipversion) = @_;
1283
1284         if (my $value = $rule->{$name}) {
1285             if ($value =~ m/^\+/) {
1286                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1287                     &$add_error($name, "no such ipset '$1'")
1288                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1289
1290                 } else {
1291                     &$add_error($name, "invalid ipset name '$value'");
1292                 }
1293             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1294                 my $alias = lc($value);
1295                 &$add_error($name, "no such alias '$value'")
1296                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1297                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1298                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1299
1300                 &$set_ip_version($e->{ipversion});
1301             }
1302         }
1303     };
1304
1305     my $type = $rule->{type};
1306     my $action = $rule->{action};
1307
1308     &$add_error('type', "missing property") if !$type;
1309     &$add_error('action', "missing property") if !$action;
1310
1311     if ($type) {
1312         if ($type eq  'in' || $type eq 'out') {
1313             &$add_error('action', "unknown action '$action'")
1314                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1315         } elsif ($type eq 'group') {
1316             &$add_error('type', "security groups not allowed")
1317                 if !$allow_groups;
1318             &$add_error('action', "invalid characters in security group name")
1319                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1320         } else {
1321             &$add_error('type', "unknown rule type '$type'");
1322         }
1323     }
1324
1325     if ($rule->{iface}) {
1326         &$add_error('type', "parameter -i not allowed for this rule type")
1327             if !$allow_iface;
1328         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1329         &$add_error('iface', $@) if $@;
1330         if ($rule_env eq 'vm') {
1331             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1332                 if $rule->{iface} !~  m/^net(\d+)$/;
1333         } elsif ($rule_env eq 'ct') {
1334             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1335                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1336         }
1337     }
1338
1339     if ($rule->{macro}) {
1340         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1341             $rule->{macro} = $preferred_name;
1342         } else {
1343             &$add_error('macro', "unknown macro '$rule->{macro}'");
1344         }
1345     }
1346
1347     if ($rule->{proto}) {
1348         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1349         &$add_error('proto', $@) if $@;
1350         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1351         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1352     }
1353
1354     if ($rule->{dport}) {
1355         eval { parse_port_name_number_or_range($rule->{dport}); };
1356         &$add_error('dport', $@) if $@;
1357         &$add_error('proto', "missing property - 'dport' requires this property")
1358             if !$rule->{proto};
1359     }
1360
1361     if ($rule->{sport}) {
1362         eval { parse_port_name_number_or_range($rule->{sport}); };
1363         &$add_error('sport', $@) if $@;
1364         &$add_error('proto', "missing property - 'sport' requires this property")
1365             if !$rule->{proto};
1366     }
1367
1368     if ($rule->{source}) {
1369         eval {
1370             my $source_ipversion = parse_address_list($rule->{source});
1371             &$set_ip_version($source_ipversion);
1372         };
1373         &$add_error('source', $@) if $@;
1374         &$check_ipset_or_alias_property('source', $ipversion);
1375     }
1376
1377     if ($rule->{dest}) {
1378         eval {
1379             my $dest_ipversion = parse_address_list($rule->{dest});
1380             &$set_ip_version($dest_ipversion);
1381         };
1382         &$add_error('dest', $@) if $@;
1383         &$check_ipset_or_alias_property('dest', $ipversion);
1384     }
1385
1386     $rule->{ipversion} = $ipversion if $ipversion;
1387
1388     if ($rule->{macro} && !$error_count) {
1389         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1390         if (my $err = $@) {
1391             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1392                 my $eh = $err->{errors};
1393                 foreach my $p (keys %$eh) {
1394                     &$add_error($p, $eh->{$p});
1395                 }
1396             } else {
1397                 &$add_error('macro', "$err");
1398             }
1399         }
1400     }
1401
1402     $rule->{errors} = $errors if $error_count;
1403
1404     return $rule;
1405 }
1406
1407 sub copy_rule_data {
1408     my ($rule, $param) = @_;
1409
1410     foreach my $k (keys %$rule_properties) {
1411         if (defined(my $v = $param->{$k})) {
1412             if ($v eq '' || $v eq '-') {
1413                 delete $rule->{$k};
1414             } else {
1415                 $rule->{$k} = $v;
1416             }
1417         }
1418     }
1419
1420     return $rule;
1421 }
1422
1423 sub rules_modify_permissions {
1424     my ($rule_env) = @_;
1425
1426     if ($rule_env eq 'host') {
1427         return {
1428             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1429         };
1430     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1431         return {
1432             check => ['perm', '/', [ 'Sys.Modify' ]],
1433         };
1434     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1435         return {
1436             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1437         }
1438     }
1439
1440     return undef;
1441 }
1442
1443 sub rules_audit_permissions {
1444     my ($rule_env) = @_;
1445
1446     if ($rule_env eq 'host') {
1447         return {
1448             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1449         };
1450     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1451         return {
1452             check => ['perm', '/', [ 'Sys.Audit' ]],
1453         };
1454     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1455         return {
1456             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1457         }
1458     }
1459
1460     return undef;
1461 }
1462
1463 # core functions
1464 my $bridge_firewall_enabled = 0;
1465
1466 sub enable_bridge_firewall {
1467
1468     return if $bridge_firewall_enabled; # only once
1469
1470     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1471     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1472
1473     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1474     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1475
1476     $bridge_firewall_enabled = 1;
1477 }
1478
1479 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1480
1481 sub iptables_restore_cmdlist {
1482     my ($cmdlist) = @_;
1483
1484     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1485 }
1486
1487 sub ip6tables_restore_cmdlist {
1488     my ($cmdlist) = @_;
1489
1490     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1491 }
1492
1493 sub ipset_restore_cmdlist {
1494     my ($cmdlist) = @_;
1495
1496     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1497 }
1498
1499 sub iptables_get_chains {
1500     my ($iptablescmd) = @_;
1501
1502     $iptablescmd = "iptables" if !$iptablescmd;
1503
1504     my $res = {};
1505
1506     # check what chains we want to track
1507     my $is_pvefw_chain = sub {
1508         my $name = shift;
1509
1510         return 1 if $name =~ m/^PVEFW-\S+$/;
1511
1512         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1513
1514         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1515
1516         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1517
1518         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1519         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1520
1521         return undef;
1522     };
1523
1524     my $table = '';
1525
1526     my $hooks = {};
1527
1528     my $parser = sub {
1529         my $line = shift;
1530
1531         return if $line =~ m/^#/;
1532         return if $line =~ m/^\s*$/;
1533
1534         if ($line =~ m/^\*(\S+)$/) {
1535             $table = $1;
1536             return;
1537         }
1538
1539         return if $table ne 'filter';
1540
1541         if ($line =~ m/^:(\S+)\s/) {
1542             my $chain = $1;
1543             return if !&$is_pvefw_chain($chain);
1544             $res->{$chain} = "unknown";
1545         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1546             my ($chain, $sig) = ($1, $2);
1547             return if !&$is_pvefw_chain($chain);
1548             $res->{$chain} = $sig;
1549         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1550             $hooks->{$1} = 1;
1551         } else {
1552             # simply ignore the rest
1553             return;
1554         }
1555     };
1556
1557     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1558
1559     return wantarray ? ($res, $hooks) : $res;
1560 }
1561
1562 sub iptables_chain_digest {
1563     my ($rules) = @_;
1564     my $digest = Digest::SHA->new('sha1');
1565     foreach my $rule (@$rules) { # order is important
1566         $digest->add($rule);
1567     }
1568     return $digest->b64digest;
1569 }
1570
1571 sub ipset_chain_digest {
1572     my ($rules) = @_;
1573
1574     my $digest = Digest::SHA->new('sha1');
1575     foreach my $rule (sort @$rules) { # note: sorted
1576         $digest->add($rule);
1577     }
1578     return $digest->b64digest;
1579 }
1580
1581 sub ipset_get_chains {
1582
1583     my $res = {};
1584     my $chains = {};
1585
1586     my $parser = sub {
1587         my $line = shift;
1588
1589         return if $line =~ m/^#/;
1590         return if $line =~ m/^\s*$/;
1591         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1592             my $chain = $1;
1593             $line =~ s/\s+$//; # delete trailing white space
1594             push @{$chains->{$chain}}, $line;
1595         } else {
1596             # simply ignore the rest
1597             return;
1598         }
1599     };
1600
1601     run_command("/usr/sbin/ipset save", outfunc => $parser);
1602
1603     # compute digest for each chain
1604     foreach my $chain (keys %$chains) {
1605         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1606     }
1607
1608     return $res;
1609 }
1610
1611 sub ruleset_generate_cmdstr {
1612     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1613
1614     return if defined($rule->{enable}) && !$rule->{enable};
1615     return if $rule->{errors};
1616
1617     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1618
1619     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1620     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1621
1622     my @cmd = ();
1623
1624     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1625     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1626
1627     my $source = $rule->{source};
1628     my $dest = $rule->{dest};
1629
1630     if ($source) {
1631         if ($source =~ m/^\+/) {
1632             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1633                 my $name = $1;
1634                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1635                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1636                     push @cmd, "-m set --match-set ${ipset_chain} src";
1637                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1638                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1639                     push @cmd, "-m set --match-set ${ipset_chain} src";
1640                 } else {
1641                     die "no such ipset '$name'\n";
1642                 }
1643             } else {
1644                 die "invalid security group name '$source'\n";
1645             }
1646         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1647             my $alias = lc($source);
1648             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1649             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1650             die "no such alias '$source'\n" if !$e;
1651             push @cmd, "-s $e->{cidr}";
1652         } elsif ($source =~ m/\-/){
1653             push @cmd, "-m iprange --src-range $source";
1654         } else {
1655             push @cmd, "-s $source";
1656         }
1657     }
1658
1659     if ($dest) {
1660         if ($dest =~ m/^\+/) {
1661             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1662                 my $name = $1;
1663                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1664                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1665                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1666                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1667                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1668                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1669                 } else {
1670                     die "no such ipset '$name'\n";
1671                 }
1672             } else {
1673                 die "invalid security group name '$dest'\n";
1674             }
1675         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1676             my $alias = lc($dest);
1677             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1678             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1679             die "no such alias '$dest'\n" if !$e;
1680             push @cmd, "-d $e->{cidr}";
1681         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1682             push @cmd, "-m iprange --dst-range $dest";
1683         } else {
1684             push @cmd, "-d $dest";
1685         }
1686     }
1687
1688     if ($rule->{proto}) {
1689         push @cmd, "-p $rule->{proto}";
1690
1691         my $multiport = 0;
1692         $multiport++ if $nbdport > 1;
1693         $multiport++ if $nbsport > 1;
1694
1695         push @cmd, "--match multiport" if $multiport;
1696
1697         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1698             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1699
1700         if ($rule->{dport}) {
1701             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1702                 # Note: we use dport to store --icmp-type
1703                 die "unknown icmp-type '$rule->{dport}'\n"
1704                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1705                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1706             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1707                 # Note: we use dport to store --icmpv6-type
1708                 die "unknown icmpv6-type '$rule->{dport}'\n"
1709                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1710                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1711             } else {
1712                 if ($nbdport > 1) {
1713                     if ($multiport == 2) {
1714                         push @cmd,  "--ports $rule->{dport}";
1715                     } else {
1716                         push @cmd, "--dports $rule->{dport}";
1717                     }
1718                 } else {
1719                     push @cmd, "--dport $rule->{dport}";
1720                 }
1721             }
1722         }
1723
1724         if ($rule->{sport}) {
1725             if ($nbsport > 1) {
1726                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1727             } else {
1728                 push @cmd, "--sport $rule->{sport}";
1729             }
1730         }
1731     } elsif ($rule->{dport} || $rule->{sport}) {
1732         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1733         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1734     }
1735
1736     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1737
1738     if (my $action = $rule->{action}) {
1739         $action = $actions->{$action} if defined($actions->{$action});
1740         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1741         push @cmd, $goto ? "-g $action" : "-j $action";
1742     }
1743
1744     return scalar(@cmd) ? join(' ', @cmd) : undef;
1745 }
1746
1747 sub ruleset_generate_rule {
1748     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1749
1750     my $rules;
1751
1752     if ($rule->{macro}) {
1753         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1754     } else {
1755         $rules = [ $rule ];
1756     }
1757
1758     # update all or nothing
1759
1760     my @cmds = ();
1761     foreach my $tmp (@$rules) {
1762         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1763             push @cmds, $cmdstr;
1764         }
1765     }
1766
1767     foreach my $cmdstr (@cmds) {
1768         ruleset_addrule($ruleset, $chain, $cmdstr);
1769     }
1770 }
1771
1772 sub ruleset_generate_rule_insert {
1773     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1774
1775     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1776
1777     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1778         ruleset_insertrule($ruleset, $chain, $cmdstr);
1779     }
1780 }
1781
1782 sub ruleset_create_chain {
1783     my ($ruleset, $chain) = @_;
1784
1785     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1786     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1787
1788     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1789
1790     $ruleset->{$chain} = [];
1791 }
1792
1793 sub ruleset_chain_exist {
1794     my ($ruleset, $chain) = @_;
1795
1796     return $ruleset->{$chain} ? 1 : undef;
1797 }
1798
1799 sub ruleset_addrule {
1800    my ($ruleset, $chain, $rule) = @_;
1801
1802    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1803
1804    push @{$ruleset->{$chain}}, "-A $chain $rule";
1805 }
1806
1807 sub ruleset_insertrule {
1808    my ($ruleset, $chain, $rule) = @_;
1809
1810    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1811
1812    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1813 }
1814
1815 sub get_log_rule_base {
1816     my ($chain, $vmid, $msg, $loglevel) = @_;
1817
1818     die "internal error - no log level" if !defined($loglevel);
1819
1820     $vmid = 0 if !defined($vmid);
1821
1822     # Note: we use special format for prefix to pass further
1823     # info to log daemon (VMID, LOGVELEL and CHAIN)
1824
1825     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1826 }
1827
1828 sub ruleset_addlog {
1829     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1830
1831     return if !defined($loglevel);
1832
1833     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1834
1835     $logrule = "$rule $logrule" if defined($rule);
1836
1837     ruleset_addrule($ruleset, $chain, $logrule);
1838 }
1839
1840 sub ruleset_add_chain_policy {
1841     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1842
1843     if ($policy eq 'ACCEPT') {
1844
1845         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1846                               { ACCEPT =>  $accept_action});
1847
1848     } elsif ($policy eq 'DROP') {
1849
1850         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1851
1852         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1853
1854         ruleset_addrule($ruleset, $chain, "-j DROP");
1855     } elsif ($policy eq 'REJECT') {
1856         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1857
1858         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1859
1860         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1861     } else {
1862         # should not happen
1863         die "internal error: unknown policy '$policy'";
1864     }
1865 }
1866
1867 sub ruleset_chain_add_ndp {
1868     my ($ruleset, $chain, $ipversion, $options) = @_;
1869     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1870
1871     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation -j ACCEPT");
1872     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement -j ACCEPT");
1873     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT");
1874     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT");
1875 }
1876
1877 sub ruleset_chain_add_conn_filters {
1878     my ($ruleset, $chain, $accept) = @_;
1879
1880     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1881     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1882 }
1883
1884 sub ruleset_chain_add_input_filters {
1885     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1886
1887     if ($cluster_conf->{ipset}->{blacklist}){
1888         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1889             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1890             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1891             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1892         }
1893         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1894         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1895     }
1896
1897     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1898         if ($ipversion == 4) {
1899             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1900         }
1901     }
1902
1903     if ($options->{tcpflags}) {
1904         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1905     }
1906 }
1907
1908 sub ruleset_create_vm_chain {
1909     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1910
1911     ruleset_create_chain($ruleset, $chain);
1912     my $accept = generate_nfqueue($options);
1913
1914     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1915         if ($direction eq 'OUT') {
1916             ruleset_generate_rule($ruleset, $chain, $ipversion,
1917                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1918                                     proto => 'udp', sport => 68, dport => 67 });
1919         } else {
1920             ruleset_generate_rule($ruleset, $chain, $ipversion,
1921                                   { action => 'ACCEPT',
1922                                     proto => 'udp', sport => 67, dport => 68 });
1923         }
1924     }
1925
1926     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
1927
1928     if ($direction eq 'OUT') {
1929         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1930             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1931         }
1932         if ($ipfilter_ipset) {
1933             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1934         }
1935         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1936     }
1937 }
1938
1939 sub ruleset_add_group_rule {
1940     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1941
1942     my $group = $rule->{action};
1943     my $group_chain = "GROUP-$group-$direction";
1944     if(!ruleset_chain_exist($ruleset, $group_chain)){
1945         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1946     }
1947
1948     if ($direction eq 'OUT' && $rule->{iface_out}) {
1949         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1950     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1951         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1952     } else {
1953         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1954     }
1955
1956     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1957 }
1958
1959 sub ruleset_generate_vm_rules {
1960     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1961
1962     my $lc_direction = lc($direction);
1963
1964     my $in_accept = generate_nfqueue($options);
1965
1966     foreach my $rule (@$rules) {
1967         next if $rule->{iface} && $rule->{iface} ne $netid;
1968         next if !$rule->{enable} || $rule->{errors};
1969         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1970
1971         if ($rule->{type} eq 'group') {
1972             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1973                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1974         } else {
1975             next if $rule->{type} ne $lc_direction;
1976             eval {
1977                 if ($direction eq 'OUT') {
1978                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1979                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1980                                           undef, $cluster_conf, $vmfw_conf);
1981                 } else {
1982                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1983                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1984                                           undef, $cluster_conf, $vmfw_conf);
1985                 }
1986             };
1987             warn $@ if $@;
1988         }
1989     }
1990 }
1991
1992 sub generate_nfqueue {
1993     my ($options) = @_;
1994
1995     if ($options->{ips}) {
1996         my $action = "NFQUEUE";
1997         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1998             if (defined($3) && defined($1)) {
1999                 $action .= " --queue-balance $1:$3";
2000             } elsif (defined($1)) {
2001                 $action .= " --queue-num $1";
2002             }
2003         }
2004         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2005         return $action;
2006     } else {
2007         return "ACCEPT";
2008     }
2009 }
2010
2011 sub ruleset_generate_vm_ipsrules {
2012     my ($ruleset, $options, $direction, $iface) = @_;
2013
2014     if ($options->{ips} && $direction eq 'IN') {
2015         my $nfqueue = generate_nfqueue($options);
2016
2017         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2018             ruleset_create_chain($ruleset, "PVEFW-IPS");
2019         }
2020
2021         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2022     }
2023 }
2024
2025 sub generate_venet_rules_direction {
2026     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
2027
2028     my $lc_direction = lc($direction);
2029
2030     my $rules = $vmfw_conf->{rules};
2031
2032     my $options = $vmfw_conf->{options};
2033     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2034
2035     my $chain = "venet0-$vmid-$direction";
2036
2037     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2038
2039     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2040
2041     # implement policy
2042     my $policy;
2043
2044     if ($direction eq 'OUT') {
2045         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2046     } else {
2047         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2048     }
2049
2050     my $accept = generate_nfqueue($options);
2051     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2052     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2053
2054     if ($direction eq 'OUT') {
2055         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2056             action => $chain,
2057             source => $ip,
2058             iface_in => 'venet0'});
2059     } else {
2060         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2061             action => $chain,
2062             dest => $ip,
2063             iface_out => 'venet0'});
2064     }
2065 }
2066
2067 sub generate_tap_rules_direction {
2068     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2069
2070     my $lc_direction = lc($direction);
2071
2072     my $rules = $vmfw_conf->{rules};
2073
2074     my $options = $vmfw_conf->{options};
2075     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2076
2077     my $tapchain = "$iface-$direction";
2078
2079     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2080     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2081         if $vmfw_conf->{ipset}->{$ipfilter_name};
2082
2083     # create chain with mac and ip filter
2084     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2085
2086     if ($options->{enable}) {
2087         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2088
2089         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2090
2091         # implement policy
2092         my $policy;
2093
2094         if ($direction eq 'OUT') {
2095             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2096         } else {
2097         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2098         }
2099
2100         my $accept = generate_nfqueue($options);
2101         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2102         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2103     } else {
2104         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2105         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2106     }
2107
2108     # plug the tap chain to bridge chain
2109     if ($direction eq 'IN') {
2110         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2111                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2112     } else {
2113         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2114                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2115     }
2116 }
2117
2118 sub enable_host_firewall {
2119     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2120
2121     my $options = $hostfw_conf->{options};
2122     my $cluster_options = $cluster_conf->{options};
2123     my $rules = $hostfw_conf->{rules};
2124     my $cluster_rules = $cluster_conf->{rules};
2125
2126     # host inbound firewall
2127     my $chain = "PVEFW-HOST-IN";
2128     ruleset_create_chain($ruleset, $chain);
2129
2130     my $loglevel = get_option_log_level($options, "log_level_in");
2131
2132     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2133
2134     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2135     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2136     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2137
2138     # we use RETURN because we need to check also tap rules
2139     my $accept_action = 'RETURN';
2140
2141     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2142
2143     # add host rules first, so that cluster wide rules can be overwritten
2144     foreach my $rule (@$rules, @$cluster_rules) {
2145         next if !$rule->{enable} || $rule->{errors};
2146         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2147
2148         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2149
2150         eval {
2151             if ($rule->{type} eq 'group') {
2152                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2153             } elsif ($rule->{type} eq 'in') {
2154                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2155                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2156                                       undef, $cluster_conf, $hostfw_conf);
2157             }
2158         };
2159         warn $@ if $@;
2160         delete $rule->{iface_in};
2161     }
2162
2163     # allow standard traffic for management ipset (includes cluster network)
2164     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2165     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2166     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2167     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2168     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2169     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2170
2171     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2172     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2173
2174     # corosync
2175     if ($localnet && ($ipversion == $localnet_ver)) {
2176         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2177         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2178         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2179     }
2180
2181     # implement input policy
2182     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2183     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2184
2185     # host outbound firewall
2186     $chain = "PVEFW-HOST-OUT";
2187     ruleset_create_chain($ruleset, $chain);
2188
2189     $loglevel = get_option_log_level($options, "log_level_out");
2190
2191     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2192
2193     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2194     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2195
2196     # we use RETURN because we may want to check other thigs later
2197     $accept_action = 'RETURN';
2198
2199     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2200
2201     # add host rules first, so that cluster wide rules can be overwritten
2202     foreach my $rule (@$rules, @$cluster_rules) {
2203         next if !$rule->{enable} || $rule->{errors};
2204         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2205
2206         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2207         eval {
2208             if ($rule->{type} eq 'group') {
2209                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2210             } elsif ($rule->{type} eq 'out') {
2211                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2212                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2213                                       undef, $cluster_conf, $hostfw_conf);
2214             }
2215         };
2216         warn $@ if $@;
2217         delete $rule->{iface_out};
2218     }
2219
2220     # allow standard traffic on cluster network
2221     if ($localnet && ($ipversion == $localnet_ver)) {
2222         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2223         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2224         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2225         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2226
2227         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2228         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2229         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2230     }
2231
2232     # implement output policy
2233     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2234     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2235
2236     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2237     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2238 }
2239
2240 sub generate_group_rules {
2241     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2242
2243     my $rules = $cluster_conf->{groups}->{$group};
2244
2245     if (!$rules) {
2246         warn "no such security group '$group'\n";
2247         $rules = []; # create empty chain
2248     }
2249
2250     my $chain = "GROUP-${group}-IN";
2251
2252     ruleset_create_chain($ruleset, $chain);
2253     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2254
2255     foreach my $rule (@$rules) {
2256         next if $rule->{type} ne 'in';
2257         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2258         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2259                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2260                               undef, $cluster_conf);
2261     }
2262
2263     $chain = "GROUP-${group}-OUT";
2264
2265     ruleset_create_chain($ruleset, $chain);
2266     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2267
2268     foreach my $rule (@$rules) {
2269         next if $rule->{type} ne 'out';
2270         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2271         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2272         # check also other tap rules later
2273         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2274                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2275                               undef, $cluster_conf);
2276     }
2277 }
2278
2279 my $MAX_NETS = 32;
2280 my $valid_netdev_names = {};
2281 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2282     $valid_netdev_names->{"net$i"} = 1;
2283 }
2284
2285 sub parse_fw_rule {
2286     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2287
2288     my $orig_line = $line;
2289
2290     my $rule = {};
2291
2292     # we can add single line comments to the end of the rule
2293     if ($line =~ s/#\s*(.*?)\s*$//) {
2294         $rule->{comment} = decode('utf8', $1);
2295     }
2296
2297     # we can disable a rule when prefixed with '|'
2298
2299     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2300
2301     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2302         die "unable to parse rule: $line\n";
2303
2304     $rule->{type} = lc($1);
2305     $rule->{action} = $2;
2306
2307     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2308         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2309             $rule->{macro} = $1;
2310             $rule->{action} = $2;
2311         }
2312     }
2313
2314     while (length($line)) {
2315         if ($line =~ s/^-i (\S+)\s*//) {
2316             $rule->{iface} = $1;
2317             next;
2318         }
2319
2320         last if $rule->{type} eq 'group';
2321
2322         if ($line =~ s/^-p (\S+)\s*//) {
2323             $rule->{proto} = $1;
2324             next;
2325         }
2326
2327         if ($line =~ s/^-dport (\S+)\s*//) {
2328             $rule->{dport} = $1;
2329             next;
2330         }
2331
2332         if ($line =~ s/^-sport (\S+)\s*//) {
2333             $rule->{sport} = $1;
2334             next;
2335         }
2336         if ($line =~ s/^-source (\S+)\s*//) {
2337             $rule->{source} = $1;
2338             next;
2339         }
2340         if ($line =~ s/^-dest (\S+)\s*//) {
2341             $rule->{dest} = $1;
2342             next;
2343         }
2344
2345         last;
2346     }
2347
2348     die "unable to parse rule parameters: $line\n" if length($line);
2349
2350     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2351     if ($verbose && $rule->{errors}) {
2352         warn "$prefix - errors in rule parameters: $orig_line\n";
2353         foreach my $p (keys %{$rule->{errors}}) {
2354             warn "  $p: $rule->{errors}->{$p}\n";
2355         }
2356     }
2357
2358     return $rule;
2359 }
2360
2361 sub parse_vmfw_option {
2362     my ($line) = @_;
2363
2364     my ($opt, $value);
2365
2366     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2367
2368     if ($line =~ m/^(enable|dhcp|ndp|macfilter|ips):\s*(0|1)\s*$/i) {
2369         $opt = lc($1);
2370         $value = int($2);
2371     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2372         $opt = lc($1);
2373         $value = $2 ? lc($3) : '';
2374     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2375         $opt = lc($1);
2376         $value = uc($3);
2377     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2378         $opt = lc($1);
2379         $value = $2;
2380     } else {
2381         die "can't parse option '$line'\n"
2382     }
2383
2384     return ($opt, $value);
2385 }
2386
2387 sub parse_hostfw_option {
2388     my ($line) = @_;
2389
2390     my ($opt, $value);
2391
2392     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2393
2394     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2395         $opt = lc($1);
2396         $value = int($2);
2397     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2398         $opt = lc($1);
2399         $value = $2 ? lc($3) : '';
2400     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2401         $opt = lc($1);
2402         $value = int($2);
2403     } else {
2404         die "can't parse option '$line'\n"
2405     }
2406
2407     return ($opt, $value);
2408 }
2409
2410 sub parse_clusterfw_option {
2411     my ($line) = @_;
2412
2413     my ($opt, $value);
2414
2415     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2416         $opt = lc($1);
2417         $value = int($2);
2418     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2419         $opt = lc($1);
2420         $value = uc($3);
2421     } else {
2422         die "can't parse option '$line'\n"
2423     }
2424
2425     return ($opt, $value);
2426 }
2427
2428 sub resolve_alias {
2429     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2430
2431     my $alias = lc($cidr);
2432     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2433     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2434
2435     die "no such alias '$cidr'\n" if !$e;;
2436
2437     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2438 }
2439
2440 sub parse_ip_or_cidr {
2441     my ($cidr) = @_;
2442
2443     my $ipversion;
2444
2445     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2446         $cidr =~ s|/128$||;
2447         $ipversion = 6;
2448     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2449         $cidr =~ s|/32$||;
2450         $ipversion = 4;
2451     } else {
2452         die "value does not look like a valid IP address or CIDR network\n";
2453     }
2454
2455     return wantarray ? ($cidr, $ipversion) : $cidr;
2456 }
2457
2458 sub parse_alias {
2459     my ($line) = @_;
2460
2461     # we can add single line comments to the end of the line
2462     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2463
2464     if ($line =~ m/^(\S+)\s(\S+)$/) {
2465         my ($name, $cidr) = ($1, $2);
2466         my $ipversion;
2467
2468         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2469
2470         my $data = {
2471             name => $name,
2472             cidr => $cidr,
2473             ipversion => $ipversion,
2474         };
2475         $data->{comment} = $comment  if $comment;
2476         return $data;
2477     }
2478
2479     return undef;
2480 }
2481
2482 sub generic_fw_config_parser {
2483     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2484
2485     my $section;
2486     my $group;
2487
2488     my $res = $empty_conf;
2489
2490     while (defined(my $line = <$fh>)) {
2491         next if $line =~ m/^#/;
2492         next if $line =~ m/^\s*$/;
2493
2494         chomp $line;
2495
2496         my $linenr = $fh->input_line_number();
2497         my $prefix = "$filename (line $linenr)";
2498
2499         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2500             $section = 'options';
2501             next;
2502         }
2503
2504         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2505             $section = 'aliases';
2506             next;
2507         }
2508
2509         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2510             $section = 'groups';
2511             $group = lc($1);
2512             my $comment = $2;
2513             eval {
2514                 die "security group name too long\n" if length($group) > $max_group_name_length;
2515                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2516             };
2517             if (my $err = $@) {
2518                 ($section, $group, $comment) = undef;
2519                 warn "$prefix: $err";
2520                 next;
2521             }
2522
2523             $res->{$section}->{$group} = [];
2524             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2525                 if $comment;
2526             next;
2527         }
2528
2529         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2530             $section = 'rules';
2531             next;
2532         }
2533
2534         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2535             $section = 'ipset';
2536             $group = lc($1);
2537             my $comment = $2;
2538             eval {
2539                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2540                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2541             };
2542             if (my $err = $@) {
2543                 ($section, $group, $comment) = undef;
2544                 warn "$prefix: $err";
2545                 next;
2546             }
2547
2548             $res->{$section}->{$group} = [];
2549             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2550                 if $comment;
2551             next;
2552         }
2553
2554         if (!$section) {
2555             warn "$prefix: skip line - no section\n";
2556             next;
2557         }
2558
2559         if ($section eq 'options') {
2560             eval {
2561                 my ($opt, $value);
2562                 if ($rule_env eq 'cluster') {
2563                     ($opt, $value) = parse_clusterfw_option($line);
2564                 } elsif ($rule_env eq 'host') {
2565                     ($opt, $value) = parse_hostfw_option($line);
2566                 } else {
2567                     ($opt, $value) = parse_vmfw_option($line);
2568                 }
2569                 $res->{options}->{$opt} = $value;
2570             };
2571             warn "$prefix: $@" if $@;
2572         } elsif ($section eq 'aliases') {
2573             eval {
2574                 my $data = parse_alias($line);
2575                 $res->{aliases}->{lc($data->{name})} = $data;
2576             };
2577             warn "$prefix: $@" if $@;
2578         } elsif ($section eq 'rules') {
2579             my $rule;
2580             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2581             if (my $err = $@) {
2582                 warn "$prefix: $err";
2583                 next;
2584             }
2585             push @{$res->{$section}}, $rule;
2586         } elsif ($section eq 'groups') {
2587             my $rule;
2588             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2589             if (my $err = $@) {
2590                 warn "$prefix: $err";
2591                 next;
2592             }
2593             push @{$res->{$section}->{$group}}, $rule;
2594         } elsif ($section eq 'ipset') {
2595             # we can add single line comments to the end of the rule
2596             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2597
2598             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2599             my $nomatch = $1;
2600             my $cidr = $2;
2601             my $errors;
2602
2603             if ($nomatch && !$feature_ipset_nomatch) {
2604                 $errors->{nomatch} = "nomatch not supported by kernel";
2605             }
2606
2607             eval {
2608                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2609                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2610                 } else {
2611                     $cidr = parse_ip_or_cidr($cidr);
2612                 }
2613             };
2614             if (my $err = $@) {
2615                 chomp $err;
2616                 $errors->{cidr} = $err;
2617             }
2618
2619             my $entry = { cidr => $cidr };
2620             $entry->{nomatch} = 1 if $nomatch;
2621             $entry->{comment} = $comment if $comment;
2622             $entry->{errors} =  $errors if $errors;
2623
2624             if ($verbose && $errors) {
2625                 warn "$prefix - errors in ipset '$group': $line\n";
2626                 foreach my $p (keys %{$errors}) {
2627                     warn "  $p: $errors->{$p}\n";
2628                 }
2629             }
2630
2631             push @{$res->{$section}->{$group}}, $entry;
2632         } else {
2633             warn "$prefix: skip line - unknown section\n";
2634             next;
2635         }
2636     }
2637
2638     return $res;
2639 }
2640
2641 sub parse_hostfw_config {
2642     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2643
2644     my $empty_conf = { rules => [], options => {}};
2645
2646     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2647 }
2648
2649 sub parse_vmfw_config {
2650     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2651
2652     my $empty_conf = {
2653         rules => [],
2654         options => {},
2655         aliases => {},
2656         ipset => {} ,
2657         ipset_comments => {},
2658     };
2659
2660     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2661 }
2662
2663 sub parse_clusterfw_config {
2664     my ($filename, $fh, $verbose) = @_;
2665
2666     my $section;
2667     my $group;
2668
2669     my $empty_conf = {
2670         rules => [],
2671         options => {},
2672         aliases => {},
2673         groups => {},
2674         group_comments => {},
2675         ipset => {} ,
2676         ipset_comments => {},
2677     };
2678
2679     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2680 }
2681
2682 sub run_locked {
2683     my ($code, @param) = @_;
2684
2685     my $timeout = 10;
2686
2687     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2688
2689     die $@ if $@;
2690
2691     return $res;
2692 }
2693
2694 sub read_local_vm_config {
2695
2696     my $openvz = {};
2697     my $qemu = {};
2698
2699     my $vmdata = { openvz => $openvz, qemu => $qemu };
2700
2701     my $vmlist = PVE::Cluster::get_vmlist();
2702     return $vmdata if !$vmlist || !$vmlist->{ids};
2703     my $ids = $vmlist->{ids};
2704
2705     foreach my $vmid (keys %$ids) {
2706         next if !$vmid; # skip VE0
2707         my $d = $ids->{$vmid};
2708         next if !$d->{node} || $d->{node} ne $nodename;
2709         next if !$d->{type};
2710         if ($d->{type} eq 'openvz') {
2711             if ($have_pve_manager) {
2712                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2713                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2714                     $openvz->{$vmid} = $conf;
2715                 }
2716             }
2717         } elsif ($d->{type} eq 'qemu') {
2718             if ($have_qemu_server) {
2719                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2720                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2721                     $qemu->{$vmid} = $conf;
2722                 }
2723             }
2724         }
2725     }
2726
2727     return $vmdata;
2728 };
2729
2730 sub load_vmfw_conf {
2731     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2732
2733     my $vmfw_conf = {};
2734
2735     $dir = $pvefw_conf_dir if !defined($dir);
2736
2737     my $filename = "$dir/$vmid.fw";
2738     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2739         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2740         $vmfw_conf->{vmid} = $vmid;
2741     }
2742
2743     return $vmfw_conf;
2744 }
2745
2746 my $format_rules = sub {
2747     my ($rules, $allow_iface) = @_;
2748
2749     my $raw = '';
2750
2751     foreach my $rule (@$rules) {
2752         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2753             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2754             $raw .= uc($rule->{type});
2755             if ($rule->{macro}) {
2756                 $raw .= " $rule->{macro}($rule->{action})";
2757             } else {
2758                 $raw .= " " . $rule->{action};
2759             }
2760             if ($allow_iface && $rule->{iface}) {
2761                 $raw .= " -i $rule->{iface}";
2762             }
2763
2764             if ($rule->{type} ne  'group')  {
2765                 $raw .= " -source $rule->{source}" if $rule->{source};
2766                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2767                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2768                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2769                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2770             }
2771
2772             $raw .= " # " . encode('utf8', $rule->{comment})
2773                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2774             $raw .= "\n";
2775         } else {
2776             die "unknown rule type '$rule->{type}'";
2777         }
2778     }
2779
2780     return $raw;
2781 };
2782
2783 my $format_options = sub {
2784     my ($options) = @_;
2785
2786     my $raw = '';
2787
2788     $raw .= "[OPTIONS]\n\n";
2789     foreach my $opt (keys %$options) {
2790         $raw .= "$opt: $options->{$opt}\n";
2791     }
2792     $raw .= "\n";
2793
2794     return $raw;
2795 };
2796
2797 my $format_aliases = sub {
2798     my ($aliases) = @_;
2799
2800     my $raw = '';
2801
2802     $raw .= "[ALIASES]\n\n";
2803     foreach my $k (keys %$aliases) {
2804         my $e = $aliases->{$k};
2805         $raw .= "$e->{name} $e->{cidr}";
2806         $raw .= " # " . encode('utf8', $e->{comment})
2807             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2808         $raw .= "\n";
2809     }
2810     $raw .= "\n";
2811
2812     return $raw;
2813 };
2814
2815 my $format_ipsets = sub {
2816     my ($fw_conf) = @_;
2817
2818     my $raw = '';
2819
2820     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2821         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2822             my $utf8comment = encode('utf8', $comment);
2823             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2824         } else {
2825             $raw .= "[IPSET $ipset]\n\n";
2826         }
2827         my $options = $fw_conf->{ipset}->{$ipset};
2828
2829         my $nethash = {};
2830         foreach my $entry (@$options) {
2831             $nethash->{$entry->{cidr}} = $entry;
2832         }
2833
2834         foreach my $cidr (sort keys %$nethash) {
2835             my $entry = $nethash->{$cidr};
2836             my $line = $entry->{nomatch} ? '!' : '';
2837             $line .= $entry->{cidr};
2838             $line .= " # " . encode('utf8', $entry->{comment})
2839                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2840             $raw .= "$line\n";
2841         }
2842
2843         $raw .= "\n";
2844     }
2845
2846     return $raw;
2847 };
2848
2849 sub save_vmfw_conf {
2850     my ($vmid, $vmfw_conf) = @_;
2851
2852     my $raw = '';
2853
2854     my $options = $vmfw_conf->{options};
2855     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2856
2857     my $aliases = $vmfw_conf->{aliases};
2858     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2859
2860     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2861
2862     my $rules = $vmfw_conf->{rules} || [];
2863     if ($rules && scalar(@$rules)) {
2864         $raw .= "[RULES]\n\n";
2865         $raw .= &$format_rules($rules, 1);
2866         $raw .= "\n";
2867     }
2868
2869     mkdir $pvefw_conf_dir;
2870
2871     my $filename = "$pvefw_conf_dir/$vmid.fw";
2872     PVE::Tools::file_set_contents($filename, $raw);
2873 }
2874
2875 sub read_vm_firewall_configs {
2876     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2877
2878     my $vmfw_configs = {};
2879
2880     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2881         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2882         next if !$vmfw_conf->{options}; # skip if file does not exists
2883         $vmfw_configs->{$vmid} = $vmfw_conf;
2884     }
2885     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2886         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2887         next if !$vmfw_conf->{options}; # skip if file does not exists
2888         $vmfw_configs->{$vmid} = $vmfw_conf;
2889     }
2890
2891     return $vmfw_configs;
2892 }
2893
2894 sub get_option_log_level {
2895     my ($options, $k) = @_;
2896
2897     my $v = $options->{$k};
2898     $v = $default_log_level if !defined($v);
2899
2900     return undef if $v eq '' || $v eq 'nolog';
2901
2902     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2903
2904     return $v if ($v >= 0) && ($v <= 7);
2905
2906     warn "unknown log level ($k = '$v')\n";
2907
2908     return undef;
2909 }
2910
2911 sub generate_std_chains {
2912     my ($ruleset, $options, $ipversion) = @_;
2913
2914     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2915
2916     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2917
2918     my $chain;
2919
2920     if ($ipversion == 4) {
2921         # same as shorewall smurflog.
2922         $chain = 'PVEFW-smurflog';
2923         $std_chains->{$chain} = [];
2924
2925         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2926         push @{$std_chains->{$chain}}, "-j DROP";
2927     }
2928
2929     # same as shorewall logflags action.
2930     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2931     $chain = 'PVEFW-logflags';
2932     $std_chains->{$chain} = [];
2933
2934     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2935     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2936     push @{$std_chains->{$chain}}, "-j DROP";
2937
2938     foreach my $chain (keys %$std_chains) {
2939         ruleset_create_chain($ruleset, $chain);
2940         foreach my $rule (@{$std_chains->{$chain}}) {
2941             if (ref($rule)) {
2942                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2943             } else {
2944                 ruleset_addrule($ruleset, $chain, $rule);
2945             }
2946         }
2947     }
2948 }
2949
2950 sub generate_ipset_chains {
2951     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2952
2953     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2954
2955         my $options = $fw_conf->{ipset}->{$ipset};
2956
2957         # remove duplicates
2958         my $nethash = {};
2959         foreach my $entry (@$options) {
2960             next if $entry->{errors}; # skip entries with errors
2961             eval {
2962                 my ($cidr, $ver);
2963                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2964                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2965                 } else {
2966                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2967                 }
2968                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2969                 if ($ver == 6) {
2970                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2971                     $cidr = inet_ntop(AF_INET6, $ipv6);
2972                     $cidr =~ s|/128$||;
2973                 } else {
2974                     $cidr =~ s|/32$||;
2975                 }
2976
2977                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2978             };
2979             warn $@ if $@;
2980         }
2981
2982         foreach my $ipversion (4, 6) {
2983             my $data = $nethash->{$ipversion};
2984
2985             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2986
2987             my $hashsize = scalar(@$options);
2988             if ($hashsize <= 64) {
2989                 $hashsize = 64;
2990             } else {
2991                 $hashsize = round_powerof2($hashsize);
2992             }
2993
2994             my $family = $ipversion == "6" ? "inet6" : "inet";
2995
2996             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2997
2998             foreach my $cidr (sort keys %$data) {
2999                 my $entry = $data->{$cidr};
3000
3001                 my $cmd = "add $name $cidr";
3002                 if ($entry->{nomatch}) {
3003                     if ($feature_ipset_nomatch) {
3004                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3005                     } else {
3006                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3007                     }
3008                 } else {
3009                     push @{$ipset_ruleset->{$name}}, $cmd;
3010                 }
3011             }
3012         }
3013     }
3014 }
3015
3016 sub round_powerof2 {
3017     my ($int) = @_;
3018
3019     $int--;
3020     $int |= $int >> $_ foreach (1,2,4,8,16);
3021     return ++$int;
3022 }
3023
3024 sub load_clusterfw_conf {
3025     my ($filename, $verbose) = @_;
3026
3027     $filename = $clusterfw_conf_filename if !defined($filename);
3028
3029     my $cluster_conf = {};
3030     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3031         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3032     }
3033
3034     return $cluster_conf;
3035 }
3036
3037 sub save_clusterfw_conf {
3038     my ($cluster_conf) = @_;
3039
3040     my $raw = '';
3041
3042     my $options = $cluster_conf->{options};
3043     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3044
3045     my $aliases = $cluster_conf->{aliases};
3046     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3047
3048     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3049
3050     my $rules = $cluster_conf->{rules};
3051     if ($rules && scalar(@$rules)) {
3052         $raw .= "[RULES]\n\n";
3053         $raw .= &$format_rules($rules, 1);
3054         $raw .= "\n";
3055     }
3056
3057     if ($cluster_conf->{groups}) {
3058         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3059             my $rules = $cluster_conf->{groups}->{$group};
3060             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3061                 my $utf8comment = encode('utf8', $comment);
3062                 $raw .= "[group $group] # $utf8comment\n\n";
3063             } else {
3064                 $raw .= "[group $group]\n\n";
3065             }
3066
3067             $raw .= &$format_rules($rules, 0);
3068             $raw .= "\n";
3069         }
3070     }
3071
3072     mkdir $pvefw_conf_dir;
3073     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3074 }
3075
3076 sub load_hostfw_conf {
3077     my ($cluster_conf, $filename, $verbose) = @_;
3078
3079     $filename = $hostfw_conf_filename if !defined($filename);
3080
3081     my $hostfw_conf = {};
3082     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3083         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3084     }
3085     return $hostfw_conf;
3086 }
3087
3088 sub save_hostfw_conf {
3089     my ($hostfw_conf) = @_;
3090
3091     my $raw = '';
3092
3093     my $options = $hostfw_conf->{options};
3094     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3095
3096     my $rules = $hostfw_conf->{rules};
3097     if ($rules && scalar(@$rules)) {
3098         $raw .= "[RULES]\n\n";
3099         $raw .= &$format_rules($rules, 1);
3100         $raw .= "\n";
3101     }
3102
3103     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3104 }
3105
3106 sub compile {
3107     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3108
3109     my $vmfw_configs;
3110
3111     if ($vmdata) { # test mode
3112         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3113         my $filename = "$testdir/cluster.fw";
3114         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3115
3116         $filename = "$testdir/host.fw";
3117         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3118
3119         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3120     } else { # normal operation
3121         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3122
3123         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3124
3125         $vmdata = read_local_vm_config();
3126         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3127     }
3128
3129     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3130     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3131
3132     return ($ruleset, $ipset_ruleset, $rulesetv6);
3133 }
3134
3135 sub compile_iptables_filter {
3136     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3137
3138     $cluster_conf->{ipset}->{venet0} = [];
3139     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3140
3141     my $localnet;
3142     if ($cluster_conf->{aliases}->{local_network}) {
3143         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3144     } else {
3145         my $localnet_ver;
3146         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3147
3148         $cluster_conf->{aliases}->{local_network} = {
3149             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3150     }
3151
3152     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3153
3154     return ({}, {}) if !$cluster_conf->{options}->{enable};
3155
3156     my $ruleset = {};
3157
3158     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3159     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3160
3161     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3162
3163     my $hostfw_options = $hostfw_conf->{options} || {};
3164
3165     # fixme: what log level should we use here?
3166     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3167
3168     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3169
3170
3171     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3172     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3173     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3174
3175     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3176     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3177
3178     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3179
3180     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3181     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3182
3183     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3184     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3185
3186     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3187
3188     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3189
3190     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3191
3192     my $ipset_ruleset = {};
3193
3194     if ($hostfw_enable) {
3195         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3196         warn $@ if $@; # just to be sure - should not happen
3197     }
3198
3199     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3200
3201     # generate firewall rules for QEMU VMs
3202     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3203         eval {
3204             my $conf = $vmdata->{qemu}->{$vmid};
3205             my $vmfw_conf = $vmfw_configs->{$vmid};
3206             return if !$vmfw_conf;
3207
3208             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3209
3210             foreach my $netid (keys %$conf) {
3211                 next if $netid !~ m/^net(\d+)$/;
3212                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3213                 next if !$net->{firewall};
3214                 my $iface = "tap${vmid}i$1";
3215
3216                 my $macaddr = $net->{macaddr};
3217                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3218                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3219                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3220                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3221             }
3222         };
3223         warn $@ if $@; # just to be sure - should not happen
3224     }
3225
3226     # generate firewall rules for OpenVZ containers
3227     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3228         eval {
3229             my $conf = $vmdata->{openvz}->{$vmid};
3230
3231             my $vmfw_conf = $vmfw_configs->{$vmid};
3232             return if !$vmfw_conf;
3233
3234             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3235
3236             if ($vmfw_conf->{options}->{enable}) {
3237                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3238                     my $ip = $conf->{ip_address}->{value};
3239                     $ip =~ s/\s+/,/g;
3240
3241                     my @ips = ();
3242
3243                     foreach my $singleip (split(',', $ip)) {
3244                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3245                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3246                         push @ips, $singleip if $singleip_ver == $ipversion;
3247                     }
3248
3249                     if (scalar(@ips)) {
3250                         my $ip_list = join(',', @ips);
3251                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3252                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3253                     }
3254                 }
3255             }
3256
3257             if ($conf->{netif} && $conf->{netif}->{value}) {
3258                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3259                 foreach my $netid (keys %$netif) {
3260                     my $d = $netif->{$netid};
3261                     my $bridge = $d->{bridge};
3262                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3263                     my $macaddr = $d->{mac};
3264                     my $iface = $d->{host_ifname};
3265                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3266                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3267                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3268                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3269                 }
3270             }
3271         };
3272         warn $@ if $@; # just to be sure - should not happen
3273     }
3274
3275     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3276         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3277     }
3278
3279     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3280
3281     return ($ruleset, $ipset_ruleset);
3282 }
3283
3284 sub get_ruleset_status {
3285     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3286
3287     my $statushash = {};
3288
3289     foreach my $chain (sort keys %$ruleset) {
3290         my $sig = &$digest_fn($ruleset->{$chain});
3291
3292         $statushash->{$chain}->{sig} = $sig;
3293
3294         my $oldsig = $active_chains->{$chain};
3295         if (!defined($oldsig)) {
3296             $statushash->{$chain}->{action} = 'create';
3297         } else {
3298             if ($oldsig eq $sig) {
3299                 $statushash->{$chain}->{action} = 'exists';
3300             } else {
3301                 $statushash->{$chain}->{action} = 'update';
3302             }
3303         }
3304         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3305         foreach my $cmd (@{$ruleset->{$chain}}) {
3306             print "\t$cmd\n" if $verbose;
3307         }
3308     }
3309
3310     foreach my $chain (sort keys %$active_chains) {
3311         if (!defined($ruleset->{$chain})) {
3312             my $sig = $active_chains->{$chain};
3313             $statushash->{$chain}->{action} = 'delete';
3314             $statushash->{$chain}->{sig} = $sig;
3315             print "delete $chain ($sig)\n" if $verbose;
3316         }
3317     }
3318
3319     return $statushash;
3320 }
3321
3322 sub print_sig_rule {
3323     my ($chain, $sig) = @_;
3324
3325     # We just use this to store a SHA1 checksum used to detect changes
3326     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3327 }
3328
3329 sub get_ruleset_cmdlist {
3330     my ($ruleset, $verbose, $iptablescmd) = @_;
3331
3332     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3333
3334     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3335     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3336
3337     # create missing chains first
3338     foreach my $chain (sort keys %$ruleset) {
3339         my $stat = $statushash->{$chain};
3340         die "internal error" if !$stat;
3341         next if $stat->{action} ne 'create';
3342
3343         $cmdlist .= ":$chain - [0:0]\n";
3344     }
3345
3346     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3347         my $chain = "PVEFW-$h";
3348         if ($ruleset->{$chain} && !$hooks->{$h}) {
3349             $cmdlist .= "-A $h -j $chain\n";
3350         }
3351     }
3352
3353     foreach my $chain (sort keys %$ruleset) {
3354         my $stat = $statushash->{$chain};
3355         die "internal error" if !$stat;
3356
3357         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3358             $cmdlist .= "-F $chain\n";
3359             foreach my $cmd (@{$ruleset->{$chain}}) {
3360                 $cmdlist .= "$cmd\n";
3361             }
3362             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3363         } elsif ($stat->{action} eq 'delete') {
3364             die "internal error"; # this should not happen
3365         } elsif ($stat->{action} eq 'exists') {
3366             # do nothing
3367         } else {
3368             die "internal error - unknown status '$stat->{action}'";
3369         }
3370     }
3371
3372     foreach my $chain (keys %$statushash) {
3373         next if $statushash->{$chain}->{action} ne 'delete';
3374         $cmdlist .= "-F $chain\n";
3375     }
3376     foreach my $chain (keys %$statushash) {
3377         next if $statushash->{$chain}->{action} ne 'delete';
3378         next if $chain eq 'PVEFW-INPUT';
3379         next if $chain eq 'PVEFW-OUTPUT';
3380         next if $chain eq 'PVEFW-FORWARD';
3381         $cmdlist .= "-X $chain\n";
3382     }
3383
3384     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3385
3386     $cmdlist .= "COMMIT\n";
3387
3388     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3389 }
3390
3391 sub get_ipset_cmdlist {
3392     my ($ruleset, $verbose) = @_;
3393
3394     my $cmdlist = "";
3395
3396     my $delete_cmdlist = "";
3397
3398     my $active_chains = ipset_get_chains();
3399     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3400
3401     # remove stale _swap chains
3402     foreach my $chain (keys %$active_chains) {
3403         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3404             $cmdlist .= "destroy $chain\n";
3405         }
3406     }
3407
3408     foreach my $chain (keys %$ruleset) {
3409         my $stat = $statushash->{$chain};
3410         die "internal error" if !$stat;
3411
3412         if ($stat->{action} eq 'create') {
3413             foreach my $cmd (@{$ruleset->{$chain}}) {
3414                 $cmdlist .= "$cmd\n";
3415             }
3416         }
3417     }
3418
3419     foreach my $chain (keys %$ruleset) {
3420         my $stat = $statushash->{$chain};
3421         die "internal error" if !$stat;
3422
3423         if ($stat->{action} eq 'update') {
3424             my $chain_swap = $chain."_swap";
3425
3426             foreach my $cmd (@{$ruleset->{$chain}}) {
3427                 $cmd =~ s/$chain/$chain_swap/;
3428                 $cmdlist .= "$cmd\n";
3429             }
3430             $cmdlist .= "swap $chain_swap $chain\n";
3431             $cmdlist .= "flush $chain_swap\n";
3432             $cmdlist .= "destroy $chain_swap\n";
3433         }
3434     }
3435
3436      # the remove unused chains
3437     foreach my $chain (keys %$statushash) {
3438         next if $statushash->{$chain}->{action} ne 'delete';
3439
3440         $delete_cmdlist .= "flush $chain\n";
3441         $delete_cmdlist .= "destroy $chain\n";
3442     }
3443
3444     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3445
3446     return ($cmdlist, $delete_cmdlist, $changes);
3447 }
3448
3449 sub apply_ruleset {
3450     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3451
3452     enable_bridge_firewall();
3453
3454     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3455         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3456
3457     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3458     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3459
3460     if ($verbose) {
3461         if ($ipset_changes) {
3462             print "ipset changes:\n";
3463             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3464             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3465         }
3466
3467         if ($changes) {
3468             print "iptables changes:\n";
3469             print $cmdlist;
3470         }
3471
3472         if ($changesv6) {
3473             print "ip6tables changes:\n";
3474             print $cmdlistv6;
3475         }
3476     }
3477
3478     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3479     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3480
3481     ipset_restore_cmdlist($ipset_create_cmdlist);
3482
3483     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3484     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3485
3486     iptables_restore_cmdlist($cmdlist);
3487
3488     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3489     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3490
3491     ip6tables_restore_cmdlist($cmdlistv6);
3492
3493     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3494     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3495
3496     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3497
3498     # test: re-read status and check if everything is up to date
3499     my $active_chains = iptables_get_chains();
3500     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3501
3502     my $errors;
3503     foreach my $chain (sort keys %$ruleset) {
3504         my $stat = $statushash->{$chain};
3505         if ($stat->{action} ne 'exists') {
3506             warn "unable to update chain '$chain'\n";
3507             $errors = 1;
3508         }
3509     }
3510
3511     my $active_chainsv6 = iptables_get_chains("ip6tables");
3512     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3513
3514     foreach my $chain (sort keys %$rulesetv6) {
3515         my $stat = $statushashv6->{$chain};
3516         if ($stat->{action} ne 'exists') {
3517             warn "unable to update chain '$chain'\n";
3518             $errors = 1;
3519         }
3520     }
3521
3522     die "unable to apply firewall changes\n" if $errors;
3523
3524     update_nf_conntrack_max($hostfw_conf);
3525
3526     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3527
3528 }
3529
3530 sub update_nf_conntrack_max {
3531     my ($hostfw_conf) = @_;
3532
3533     my $max = 65536; # reasonable default
3534
3535     my $options = $hostfw_conf->{options} || {};
3536
3537     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3538         $max = $options->{nf_conntrack_max};
3539         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3540     }
3541
3542     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3543     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3544
3545     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3546
3547     if ($current != $max) {
3548         my $hashsize = int($max/4);
3549         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3550         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3551     }
3552 }
3553
3554 sub update_nf_conntrack_tcp_timeout_established {
3555     my ($hostfw_conf) = @_;
3556
3557     my $options = $hostfw_conf->{options} || {};
3558
3559     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3560
3561     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3562 }
3563
3564 sub remove_pvefw_chains {
3565
3566     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3567     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3568     PVE::Firewall::remove_pvefw_chains_ipset();
3569
3570 }
3571
3572 sub remove_pvefw_chains_iptables {
3573     my ($iptablescmd) = @_;
3574
3575     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3576     my $cmdlist = "*filter\n";
3577
3578     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3579         if ($hooks->{$h}) {
3580             $cmdlist .= "-D $h -j PVEFW-$h\n";
3581         }
3582     }
3583
3584     foreach my $chain (keys %$chash) {
3585         $cmdlist .= "-F $chain\n";
3586     }
3587
3588     foreach my $chain (keys %$chash) {
3589         $cmdlist .= "-X $chain\n";
3590     }
3591     $cmdlist .= "COMMIT\n";
3592
3593     if($iptablescmd eq "ip6tables") {
3594         ip6tables_restore_cmdlist($cmdlist);
3595     } else {
3596         iptables_restore_cmdlist($cmdlist);
3597     }
3598 }
3599
3600 sub remove_pvefw_chains_ipset {
3601
3602     my $ipset_chains = ipset_get_chains();
3603
3604     my $cmdlist = "";
3605
3606     foreach my $chain (keys %$ipset_chains) {
3607         $cmdlist .= "flush $chain\n";
3608         $cmdlist .= "destroy $chain\n";
3609     }
3610
3611     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3612 }
3613
3614 sub init {
3615     my $cluster_conf = load_clusterfw_conf();
3616     my $cluster_options = $cluster_conf->{options};
3617     my $enable = $cluster_options->{enable};
3618
3619     return if !$enable;
3620
3621     # load required modules here
3622 }
3623
3624 sub update {
3625     my $code = sub {
3626
3627         my $cluster_conf = load_clusterfw_conf();
3628         my $cluster_options = $cluster_conf->{options};
3629
3630         if (!$cluster_options->{enable}) {
3631             PVE::Firewall::remove_pvefw_chains();
3632             return;
3633         }
3634
3635         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3636
3637         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3638
3639         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3640     };
3641
3642     run_locked($code);
3643 }
3644
3645 1;