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