src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 149     ],
 150     'Trcrt' => [
 151         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 152         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 153     ],
 154  };
 155
 156 # imported/converted from: /usr/share/shorewall/macro.*
 157 my $pve_fw_macros = {
 158     'Amanda' => [
 159         "Amanda Backup",
 160         { action => 'PARAM', proto => 'udp', dport => '10080' },
 161         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 162     ],
 163     'Auth' => [
 164         "Auth (identd) traffic",
 165         { action => 'PARAM', proto => 'tcp', dport => '113' },
 166     ],
 167     'BGP' => [
 168         "Border Gateway Protocol traffic",
 169         { action => 'PARAM', proto => 'tcp', dport => '179' },
 170     ],
 171     'BitTorrent' => [
 172         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 173         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 174         { action => 'PARAM', proto => 'udp', dport => '6881' },
 175     ],
 176     'BitTorrent32' => [
 177         "BitTorrent traffic for BitTorrent 3.2 and later",
 178         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 179         { action => 'PARAM', proto => 'udp', dport => '6881' },
 180     ],
 181     'CVS' => [
 182         "Concurrent Versions System pserver traffic",
 183         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 184     ],
 185     'Citrix' => [
 186         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 187         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 188         { action => 'PARAM', proto => 'udp', dport => '1604' },
 189         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 190     ],
 191     'DAAP' => [
 192         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 193         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 194         { action => 'PARAM', proto => 'udp', dport => '3689' },
 195     ],
 196     'DCC' => [
 197         "Distributed Checksum Clearinghouse spam filtering mechanism",
 198         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 199     ],
 200     'DHCPfwd' => [
 201         "Forwarded DHCP traffic",
 202         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 203     ],
 204     'DNS' => [
 205         "Domain Name System traffic (upd and tcp)",
 206         { action => 'PARAM', proto => 'udp', dport => '53' },
 207         { action => 'PARAM', proto => 'tcp', dport => '53' },
 208     ],
 209     'Distcc' => [
 210         "Distributed Compiler service",
 211         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 212     ],
 213     'FTP' => [
 214         "File Transfer Protocol",
 215         { action => 'PARAM', proto => 'tcp', dport => '21' },
 216     ],
 217     'Finger' => [
 218         "Finger protocol (RFC 742)",
 219         { action => 'PARAM', proto => 'tcp', dport => '79' },
 220     ],
 221     'GNUnet' => [
 222         "GNUnet secure peer-to-peer networking traffic",
 223         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 224         { action => 'PARAM', proto => 'udp', dport => '2086' },
 225         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 226         { action => 'PARAM', proto => 'udp', dport => '1080' },
 227     ],
 228     'GRE' => [
 229         "Generic Routing Encapsulation tunneling protocol",
 230         { action => 'PARAM', proto => '47' },
 231     ],
 232     'Git' => [
 233         "Git distributed revision control traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 235     ],
 236     'HKP' => [
 237         "OpenPGP HTTP keyserver protocol traffic",
 238         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 239     ],
 240     'HTTP' => [
 241         "Hypertext Transfer Protocol (WWW)",
 242         { action => 'PARAM', proto => 'tcp', dport => '80' },
 243     ],
 244     'HTTPS' => [
 245         "Hypertext Transfer Protocol (WWW) over SSL",
 246         { action => 'PARAM', proto => 'tcp', dport => '443' },
 247     ],
 248     'ICPV2' => [
 249         "Internet Cache Protocol V2 (Squid) traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '3130' },
 251     ],
 252     'ICQ' => [
 253         "AOL Instant Messenger traffic",
 254         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 255     ],
 256     'IMAP' => [
 257         "Internet Message Access Protocol",
 258         { action => 'PARAM', proto => 'tcp', dport => '143' },
 259     ],
 260     'IMAPS' => [
 261         "Internet Message Access Protocol over SSL",
 262         { action => 'PARAM', proto => 'tcp', dport => '993' },
 263     ],
 264     'IPIP' => [
 265         "IPIP capsulation traffic",
 266         { action => 'PARAM', proto => '94' },
 267     ],
 268     'IPsec' => [
 269         "IPsec traffic",
 270         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 271         { action => 'PARAM', proto => '50' },
 272     ],
 273     'IPsecah' => [
 274         "IPsec authentication (AH) traffic",
 275         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 276         { action => 'PARAM', proto => '51' },
 277     ],
 278     'IPsecnat' => [
 279         "IPsec traffic and Nat-Traversal",
 280         { action => 'PARAM', proto => 'udp', dport => '500' },
 281         { action => 'PARAM', proto => 'udp', dport => '4500' },
 282         { action => 'PARAM', proto => '50' },
 283     ],
 284     'IRC' => [
 285         "Internet Relay Chat traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 287     ],
 288     'Jetdirect' => [
 289         "HP Jetdirect printing",
 290         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 291     ],
 292     'L2TP' => [
 293         "Layer 2 Tunneling Protocol traffic",
 294         { action => 'PARAM', proto => 'udp', dport => '1701' },
 295     ],
 296     'LDAP' => [
 297         "Lightweight Directory Access Protocol traffic",
 298         { action => 'PARAM', proto => 'tcp', dport => '389' },
 299     ],
 300     'LDAPS' => [
 301         "Secure Lightweight Directory Access Protocol traffic",
 302         { action => 'PARAM', proto => 'tcp', dport => '636' },
 303     ],
 304     'MSNP' => [
 305         "Microsoft Notification Protocol",
 306         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 307     ],
 308     'MSSQL' => [
 309         "Microsoft SQL Server",
 310         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 311     ],
 312     'Mail' => [
 313         "Mail traffic (SMTP, SMTPS, Submission)",
 314         { action => 'PARAM', proto => 'tcp', dport => '25' },
 315         { action => 'PARAM', proto => 'tcp', dport => '465' },
 316         { action => 'PARAM', proto => 'tcp', dport => '587' },
 317     ],
 318     'Munin' => [
 319         "Munin networked resource monitoring traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 321     ],
 322     'MySQL' => [
 323         "MySQL server",
 324         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 325     ],
 326     'NNTP' => [
 327         "NNTP traffic (Usenet).",
 328         { action => 'PARAM', proto => 'tcp', dport => '119' },
 329     ],
 330     'NNTPS' => [
 331         "Encrypted NNTP traffic (Usenet)",
 332         { action => 'PARAM', proto => 'tcp', dport => '563' },
 333     ],
 334     'NTP' => [
 335         "Network Time Protocol (ntpd)",
 336         { action => 'PARAM', proto => 'udp', dport => '123' },
 337     ],
 338     'OSPF' => [
 339         "OSPF multicast traffic",
 340         { action => 'PARAM', proto => '89' },
 341     ],
 342     'OpenVPN' => [
 343         "OpenVPN traffic",
 344         { action => 'PARAM', proto => 'udp', dport => '1194' },
 345     ],
 346     'PCA' => [
 347         "Symantec PCAnywere (tm)",
 348         { action => 'PARAM', proto => 'udp', dport => '5632' },
 349         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 350     ],
 351     'POP3' => [
 352         "POP3 traffic",
 353         { action => 'PARAM', proto => 'tcp', dport => '110' },
 354     ],
 355     'POP3S' => [
 356         "Encrypted POP3 traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '995' },
 358     ],
 359     'PPtP' => [
 360         "Point-to-Point Tunneling Protocol",
 361         { action => 'PARAM', proto => '47' },
 362         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 363     ],
 364     'Ping' => [
 365         "ICMP echo request",
 366         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 367     ],
 368     'PostgreSQL' => [
 369         "PostgreSQL server",
 370         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 371     ],
 372     'Printer' => [
 373         "Line Printer protocol printing",
 374         { action => 'PARAM', proto => 'tcp', dport => '515' },
 375     ],
 376     'RDP' => [
 377         "Microsoft Remote Desktop Protocol traffic",
 378         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 379     ],
 380     'RIP' => [
 381         "Routing Information Protocol (bidirectional)",
 382         { action => 'PARAM', proto => 'udp', dport => '520' },
 383     ],
 384     'RNDC' => [
 385         "BIND remote management protocol",
 386         { action => 'PARAM', proto => 'tcp', dport => '953' },
 387     ],
 388     'Razor' => [
 389         "Razor Antispam System",
 390         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 391     ],
 392     'Rdate' => [
 393         "Remote time retrieval (rdate)",
 394         { action => 'PARAM', proto => 'tcp', dport => '37' },
 395     ],
 396     'Rsync' => [
 397         "Rsync server",
 398         { action => 'PARAM', proto => 'tcp', dport => '873' },
 399     ],
 400     'SANE' => [
 401         "SANE network scanning",
 402         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 403     ],
 404     'SMB' => [
 405         "Microsoft SMB traffic",
 406         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 407         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 408         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 409         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 410     ],
 411     'SMBswat' => [
 412         "Samba Web Administration Tool",
 413         { action => 'PARAM', proto => 'tcp', dport => '901' },
 414     ],
 415     'SMTP' => [
 416         "Simple Mail Transfer Protocol",
 417         { action => 'PARAM', proto => 'tcp', dport => '25' },
 418     ],
 419     'SMTPS' => [
 420         "Encrypted Simple Mail Transfer Protocol",
 421         { action => 'PARAM', proto => 'tcp', dport => '465' },
 422     ],
 423     'SNMP' => [
 424         "Simple Network Management Protocol",
 425         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 426         { action => 'PARAM', proto => 'tcp', dport => '161' },
 427     ],
 428     'SPAMD' => [
 429         "Spam Assassin SPAMD traffic",
 430         { action => 'PARAM', proto => 'tcp', dport => '783' },
 431     ],
 432     'SSH' => [
 433         "Secure shell traffic",
 434         { action => 'PARAM', proto => 'tcp', dport => '22' },
 435     ],
 436     'SVN' => [
 437         "Subversion server (svnserve)",
 438         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 439     ],
 440     'SixXS' => [
 441         "SixXS IPv6 Deployment and Tunnel Broker",
 442         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 443         { action => 'PARAM', proto => 'udp', dport => '3740' },
 444         { action => 'PARAM', proto => '41' },
 445         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 446     ],
 447     'Squid' => [
 448         "Squid web proxy traffic",
 449         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 450     ],
 451     'Submission' => [
 452         "Mail message submission traffic",
 453         { action => 'PARAM', proto => 'tcp', dport => '587' },
 454     ],
 455     'Syslog' => [
 456         "Syslog protocol (RFC 5424) traffic",
 457         { action => 'PARAM', proto => 'udp', dport => '514' },
 458         { action => 'PARAM', proto => 'tcp', dport => '514' },
 459     ],
 460     'TFTP' => [
 461         "Trivial File Transfer Protocol traffic",
 462         { action => 'PARAM', proto => 'udp', dport => '69' },
 463     ],
 464     'Telnet' => [
 465         "Telnet traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '23' },
 467     ],
 468     'Telnets' => [
 469         "Telnet over SSL",
 470         { action => 'PARAM', proto => 'tcp', dport => '992' },
 471     ],
 472     'Time' => [
 473         "RFC 868 Time protocol",
 474         { action => 'PARAM', proto => 'tcp', dport => '37' },
 475     ],
 476     'Trcrt' => [
 477         "Traceroute (for up to 30 hops) traffic",
 478         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 479         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 480     ],
 481     'VNC' => [
 482         "VNC traffic for VNC display's 0 - 99",
 483         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 484     ],
 485     'VNCL' => [
 486         "VNC traffic from Vncservers to Vncviewers in listen mode",
 487         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 488     ],
 489     'Web' => [
 490         "WWW traffic (HTTP and HTTPS)",
 491         { action => 'PARAM', proto => 'tcp', dport => '80' },
 492         { action => 'PARAM', proto => 'tcp', dport => '443' },
 493     ],
 494     'Webcache' => [
 495         "Web Cache/Proxy traffic (port 8080)",
 496         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 497     ],
 498     'Webmin' => [
 499         "Webmin traffic",
 500         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 501     ],
 502     'Whois' => [
 503         "Whois (nicname, RFC 3912) traffic",
 504         { action => 'PARAM', proto => 'tcp', dport => '43' },
 505     ],
 506 };
 507
 508 my $pve_fw_parsed_macros;
 509 my $pve_fw_macro_descr;
 510 my $pve_fw_macro_ipversion = {};
 511 my $pve_fw_preferred_macro_names = {};
 512
 513 my $pve_std_chains = {};
 514 $pve_std_chains->{4} = {
 515     'PVEFW-SET-ACCEPT-MARK' => [
 516         "-j MARK --set-mark 1",
 517     ],
 518     'PVEFW-DropBroadcast' => [
 519         # same as shorewall 'Broadcast'
 520         # simply DROP BROADCAST/MULTICAST/ANYCAST
 521         # we can use this to reduce logging
 522         { action => 'DROP', dsttype => 'BROADCAST' },
 523         { action => 'DROP', dsttype => 'MULTICAST' },
 524         { action => 'DROP', dsttype => 'ANYCAST' },
 525         { action => 'DROP', dest => '224.0.0.0/4' },
 526     ],
 527     'PVEFW-reject' => [
 528         # same as shorewall 'reject'
 529         { action => 'DROP', dsttype => 'BROADCAST' },
 530         { action => 'DROP', source => '224.0.0.0/4' },
 531         { action => 'DROP', proto => 'icmp' },
 532         "-p tcp -j REJECT --reject-with tcp-reset",
 533         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 534         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 535         "-j REJECT --reject-with icmp-host-prohibited",
 536     ],
 537     'PVEFW-Drop' => [
 538         # same as shorewall 'Drop', which is equal to DROP,
 539         # but REJECT/DROP some packages to reduce logging,
 540         # and ACCEPT critical ICMP types
 541         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 542         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 543         { action => 'PVEFW-DropBroadcast' },
 544         # ACCEPT critical ICMP types
 545         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 547         # Drop packets with INVALID state
 548         "-m conntrack --ctstate INVALID -j DROP",
 549         # Drop Microsoft SMB noise
 550         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 551         { action => 'DROP', proto => 'udp', dport => '137:139'},
 552         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 553         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 554         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 555         # Drop new/NotSyn traffic so that it doesn't get logged
 556         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 557         # Drop DNS replies
 558         { action => 'DROP', proto => 'udp', sport => 53 },
 559     ],
 560     'PVEFW-Reject' => [
 561         # same as shorewall 'Reject', which is equal to Reject,
 562         # but REJECT/DROP some packages to reduce logging,
 563         # and ACCEPT critical ICMP types
 564         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 565         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 566         { action => 'PVEFW-DropBroadcast' },
 567         # ACCEPT critical ICMP types
 568         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 569         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 570         # Drop packets with INVALID state
 571         "-m conntrack --ctstate INVALID -j DROP",
 572         # Drop Microsoft SMB noise
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 574         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 575         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 576         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 577         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 578         # Drop new/NotSyn traffic so that it doesn't get logged
 579         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 580         # Drop DNS replies
 581         { action => 'DROP', proto => 'udp', sport => 53 },
 582     ],
 583     'PVEFW-tcpflags' => [
 584         # same as shorewall tcpflags action.
 585         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 586         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 588         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 589         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 590         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 591     ],
 592     'PVEFW-smurfs' => [
 593         # same as shorewall smurfs action
 594         # Filter packets for smurfs (packets with a broadcast address as the source).
 595         "-s 0.0.0.0/32 -j RETURN",
 596         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 597         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 598     ],
 599 };
 600
 601 $pve_std_chains->{6} = {
 602     'PVEFW-SET-ACCEPT-MARK' => [
 603         "-j MARK --set-mark 1",
 604     ],
 605     'PVEFW-DropBroadcast' => [
 606         # same as shorewall 'Broadcast'
 607         # simply DROP BROADCAST/MULTICAST/ANYCAST
 608         # we can use this to reduce logging
 609         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 610         # ipv6 addrtype does not work with kernel 2.6.32
 611         #{ action => 'DROP', dsttype => 'MULTICAST' },
 612         #{ action => 'DROP', dsttype => 'ANYCAST' },
 613         { action => 'DROP', dest => 'ff00::/8' },
 614         #{ action => 'DROP', dest => '224.0.0.0/4' },
 615     ],
 616     'PVEFW-reject' => [
 617         # same as shorewall 'reject'
 618         #{ action => 'DROP', dsttype => 'BROADCAST' },
 619         #{ action => 'DROP', source => '224.0.0.0/4' },
 620         { action => 'DROP', proto => 'icmpv6' },
 621         "-p tcp -j REJECT --reject-with tcp-reset",
 622         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 623         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 624         #"-j REJECT --reject-with icmp-host-prohibited",
 625     ],
 626     'PVEFW-Drop' => [
 627         # same as shorewall 'Drop', which is equal to DROP,
 628         # but REJECT/DROP some packages to reduce logging,
 629         # and ACCEPT critical ICMP types
 630         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 631         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 632         { action => 'PVEFW-DropBroadcast' },
 633         # ACCEPT critical ICMP types
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 635         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 636         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 637
 638         # Drop packets with INVALID state
 639         "-m conntrack --ctstate INVALID -j DROP",
 640         # Drop Microsoft SMB noise
 641         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 642         { action => 'DROP', proto => 'udp', dport => '137:139'},
 643         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 644         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 645         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 646         # Drop new/NotSyn traffic so that it doesn't get logged
 647         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 648         # Drop DNS replies
 649         { action => 'DROP', proto => 'udp', sport => 53 },
 650     ],
 651     'PVEFW-Reject' => [
 652         # same as shorewall 'Reject', which is equal to Reject,
 653         # but REJECT/DROP some packages to reduce logging,
 654         # and ACCEPT critical ICMP types
 655         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 656         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 657         { action => 'PVEFW-DropBroadcast' },
 658         # ACCEPT critical ICMP types
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 660         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 661         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 662
 663         # Drop packets with INVALID state
 664         "-m conntrack --ctstate INVALID -j DROP",
 665         # Drop Microsoft SMB noise
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 667         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 668         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 669         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 670         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 671         # Drop new/NotSyn traffic so that it doesn't get logged
 672         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 673         # Drop DNS replies
 674         { action => 'DROP', proto => 'udp', sport => 53 },
 675     ],
 676     'PVEFW-tcpflags' => [
 677         # same as shorewall tcpflags action.
 678         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 679         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 681         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 682         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 683         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 684     ],
 685 };
 686
 687 # iptables -p icmp -h
 688 my $icmp_type_names = {
 689     any => 1,
 690     'echo-reply' => 1,
 691     'destination-unreachable' => 1,
 692     'network-unreachable' => 1,
 693     'host-unreachable' => 1,
 694     'protocol-unreachable' => 1,
 695     'port-unreachable' => 1,
 696     'fragmentation-needed' => 1,
 697     'source-route-failed' => 1,
 698     'network-unknown' => 1,
 699     'host-unknown' => 1,
 700     'network-prohibited' => 1,
 701     'host-prohibited' => 1,
 702     'TOS-network-unreachable' => 1,
 703     'TOS-host-unreachable' => 1,
 704     'communication-prohibited' => 1,
 705     'host-precedence-violation' => 1,
 706     'precedence-cutoff' => 1,
 707     'source-quench' => 1,
 708     'redirect' => 1,
 709     'network-redirect' => 1,
 710     'host-redirect' => 1,
 711     'TOS-network-redirect' => 1,
 712     'TOS-host-redirect' => 1,
 713     'echo-request' => 1,
 714     'router-advertisement' => 1,
 715     'router-solicitation' => 1,
 716     'time-exceeded' => 1,
 717     'ttl-zero-during-transit' => 1,
 718     'ttl-zero-during-reassembly' => 1,
 719     'parameter-problem' => 1,
 720     'ip-header-bad' => 1,
 721     'required-option-missing' => 1,
 722     'timestamp-request' => 1,
 723     'timestamp-reply' => 1,
 724     'address-mask-request' => 1,
 725     'address-mask-reply' => 1,
 726 };
 727
 728 # ip6tables -p icmpv6 -h
 729
 730 my $icmpv6_type_names = {
 731     'any' => 1,
 732     'destination-unreachable' => 1,
 733     'no-route' => 1,
 734     'communication-prohibited' => 1,
 735     'address-unreachable' => 1,
 736     'port-unreachable' => 1,
 737     'packet-too-big' => 1,
 738     'time-exceeded' => 1,
 739     'ttl-zero-during-transit' => 1,
 740     'ttl-zero-during-reassembly' => 1,
 741     'parameter-problem' => 1,
 742     'bad-header' => 1,
 743     'unknown-header-type' => 1,
 744     'unknown-option' => 1,
 745     'echo-request' => 1,
 746     'echo-reply' => 1,
 747     'router-solicitation' => 1,
 748     'router-advertisement' => 1,
 749     'neighbor-solicitation' => 1,
 750     'neighbour-solicitation' => 1,
 751     'neighbor-advertisement' => 1,
 752     'neighbour-advertisement' => 1,
 753     'redirect' => 1,
 754 };
 755
 756 sub init_firewall_macros {
 757
 758     $pve_fw_parsed_macros = {};
 759
 760     my $parse = sub {
 761         my ($k, $macro) = @_;
 762         my $lc_name = lc($k);
 763         $pve_fw_macro_ipversion->{$k} = 0;
 764         while (!ref($macro->[0])) {
 765             my $desc = shift @$macro;
 766             if ($desc eq 'ipv4only') {
 767                 $pve_fw_macro_ipversion->{$k} = 4;
 768             } elsif ($desc eq 'ipv6only') {
 769                 $pve_fw_macro_ipversion->{$k} = 6;
 770             } else {
 771                 $pve_fw_macro_descr->{$k} = $desc;
 772             }
 773         }
 774         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 775         $pve_fw_parsed_macros->{$k} = $macro;
 776     };
 777
 778     foreach my $k (keys %$pve_fw_macros) {
 779         &$parse($k, $pve_fw_macros->{$k});
 780     }
 781
 782     foreach my $k (keys %$pve_ipv6fw_macros) {
 783         next if $pve_fw_parsed_macros->{$k};
 784         &$parse($k, $pve_ipv6fw_macros->{$k});
 785         $pve_fw_macro_ipversion->{$k} = 6;
 786     }
 787 }
 788
 789 init_firewall_macros();
 790
 791 sub get_macros {
 792     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 793 }
 794
 795 my $etc_services;
 796
 797 sub get_etc_services {
 798
 799     return $etc_services if $etc_services;
 800
 801     my $filename = "/etc/services";
 802
 803     my $fh = IO::File->new($filename, O_RDONLY);
 804     if (!$fh) {
 805         warn "unable to read '$filename' - $!\n";
 806         return {};
 807     }
 808
 809     my $services = {};
 810
 811     while (my $line = <$fh>) {
 812         chomp ($line);
 813         next if $line =~m/^#/;
 814         next if ($line =~m/^\s*$/);
 815
 816         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 817             $services->{byid}->{$2}->{name} = $1;
 818             $services->{byid}->{$2}->{port} = $2;
 819             $services->{byid}->{$2}->{$3} = 1;
 820             $services->{byname}->{$1} = $services->{byid}->{$2};
 821         }
 822     }
 823
 824     close($fh);
 825
 826     $etc_services = $services;
 827
 828
 829     return $etc_services;
 830 }
 831
 832 my $etc_protocols;
 833
 834 sub get_etc_protocols {
 835     return $etc_protocols if $etc_protocols;
 836
 837     my $filename = "/etc/protocols";
 838
 839     my $fh = IO::File->new($filename, O_RDONLY);
 840     if (!$fh) {
 841         warn "unable to read '$filename' - $!\n";
 842         return {};
 843     }
 844
 845     my $protocols = {};
 846
 847     while (my $line = <$fh>) {
 848         chomp ($line);
 849         next if $line =~m/^#/;
 850         next if ($line =~m/^\s*$/);
 851
 852         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 853             $protocols->{byid}->{$2}->{name} = $1;
 854             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 855         }
 856     }
 857
 858     close($fh);
 859
 860     # add special case for ICMP v6
 861     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 862     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 863
 864     $etc_protocols = $protocols;
 865
 866     return $etc_protocols;
 867 }
 868
 869 my $ipv4_mask_hash_localnet = {
 870     '255.255.0.0' => 16,
 871     '255.255.128.0' => 17,
 872     '255.255.192.0' => 18,
 873     '255.255.224.0' => 19,
 874     '255.255.240.0' => 20,
 875     '255.255.248.0' => 21,
 876     '255.255.252.0' => 22,
 877     '255.255.254.0' => 23,
 878     '255.255.255.0' => 24,
 879     '255.255.255.128' => 25,
 880     '255.255.255.192' => 26,
 881     '255.255.255.224' => 27,
 882     '255.255.255.240' => 28,
 883     '255.255.255.248' => 29,
 884     '255.255.255.252' => 30,
 885 };
 886
 887 my $__local_network;
 888
 889 sub local_network {
 890     my ($new_value) = @_;
 891
 892     $__local_network = $new_value if defined($new_value);
 893
 894     return $__local_network if defined($__local_network);
 895
 896     eval {
 897         my $nodename = PVE::INotify::nodename();
 898
 899         my $ip = PVE::Cluster::remote_node_ip($nodename);
 900
 901         my $testip = Net::IP->new($ip);
 902
 903         my $routes = PVE::ProcFSTools::read_proc_net_route();
 904         foreach my $entry (@$routes) {
 905             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 906             next if !defined($mask);
 907             return if $mask eq '0.0.0.0';
 908             my $cidr = "$entry->{dest}/$mask";
 909             my $testnet = Net::IP->new($cidr);
 910             if ($testnet->overlaps($testip)) {
 911                 $__local_network = $cidr;
 912                 return;
 913             }
 914         }
 915     };
 916     warn $@ if $@;
 917
 918     return $__local_network;
 919 }
 920
 921 # ipset names are limited to 31 characters,
 922 # and we use '-v4' or '-v6' to indicate IP versions,
 923 # and we use '_swap' suffix for atomic update,
 924 # for example PVEFW-${VMID}-${ipset_name}_swap
 925
 926 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 927
 928 sub compute_ipset_chain_name {
 929     my ($vmid, $ipset_name, $ipversion) = @_;
 930
 931     $vmid = 0 if !defined($vmid);
 932
 933     my $id = "$vmid-${ipset_name}-v$ipversion";
 934
 935     if (length($id) > $max_iptables_ipset_name_length) {
 936         $id = PVE::Tools::fnv31a_hex($id);
 937     }
 938
 939     return "PVEFW-$id";
 940 }
 941
 942 sub compute_ipfilter_ipset_name {
 943     my ($iface) = @_;
 944
 945     return "ipfilter-$iface";
 946 }
 947
 948 sub parse_address_list {
 949     my ($str) = @_;
 950
 951     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 952         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 953         return;
 954     }
 955
 956     if ($str =~ m/^${ip_alias_pattern}$/) {
 957         die "alias name too long\n" if length($str) > $max_alias_name_length;
 958         return;
 959     }
 960
 961     my $count = 0;
 962     my $iprange = 0;
 963     my $ipversion;
 964
 965     foreach my $elem (split(/,/, $str)) {
 966         $count++;
 967         my $ip = Net::IP->new($elem);
 968         if (!$ip) {
 969             my $err = Net::IP::Error();
 970             die "invalid IP address: $err\n";
 971         }
 972         $iprange = 1 if $elem =~ m/-/;
 973
 974         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 975
 976         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 977             if $ipversion && ($new_ipversion != $ipversion);
 978
 979         $ipversion = $new_ipversion;
 980     }
 981
 982     die "you can't use a range in a list\n" if $iprange && $count > 1;
 983
 984     return $ipversion;
 985 }
 986
 987 sub parse_port_name_number_or_range {
 988     my ($str, $dport) = @_;
 989
 990     my $services = PVE::Firewall::get_etc_services();
 991     my $count = 0;
 992     my $icmp_port = 0;
 993
 994     foreach my $item (split(/,/, $str)) {
 995         $count++;
 996         if ($item =~ m/^(\d+):(\d+)$/) {
 997             my ($port1, $port2) = ($1, $2);
 998             die "invalid port '$port1'\n" if $port1 > 65535;
 999             die "invalid port '$port2'\n" if $port2 > 65535;
1000         } elsif ($item =~ m/^(\d+)$/) {
1001             my $port = $1;
1002             die "invalid port '$port'\n" if $port > 65535;
1003         } else {
1004             if ($dport && $icmp_type_names->{$item}) {
1005                 $icmp_port = 1;
1006             } elsif ($dport && $icmpv6_type_names->{$item}) {
1007                 $icmp_port = 1;
1008             } else {
1009                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1010             }
1011         }
1012     }
1013
1014     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1015
1016     return $count;
1017 }
1018
1019 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1020 sub pve_fw_verify_sport_spec {
1021    my ($portstr) = @_;
1022
1023    parse_port_name_number_or_range($portstr, 0);
1024
1025    return $portstr;
1026 }
1027
1028 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1029 sub pve_fw_verify_dport_spec {
1030    my ($portstr) = @_;
1031
1032    parse_port_name_number_or_range($portstr, 1);
1033
1034    return $portstr;
1035 }
1036
1037 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1038 sub pve_fw_verify_addr_spec {
1039    my ($list) = @_;
1040
1041    parse_address_list($list);
1042
1043    return $list;
1044 }
1045
1046 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1047 sub pve_fw_verify_protocol_spec {
1048    my ($proto) = @_;
1049
1050    my $protocols = get_etc_protocols();
1051
1052    die "unknown protocol '$proto'\n" if $proto &&
1053        !(defined($protocols->{byname}->{$proto}) ||
1054          defined($protocols->{byid}->{$proto}));
1055
1056    return $proto;
1057 }
1058
1059
1060 # helper function for API
1061
1062 sub copy_opject_with_digest {
1063     my ($object) = @_;
1064
1065     my $sha = Digest::SHA->new('sha1');
1066
1067     my $res = {};
1068     foreach my $k (sort keys %$object) {
1069         my $v = $object->{$k};
1070         next if !defined($v);
1071         $res->{$k} = $v;
1072         $sha->add($k, ':', $v, "\n");
1073     }
1074
1075     my $digest = $sha->hexdigest;
1076
1077     $res->{digest} = $digest;
1078
1079     return wantarray ? ($res, $digest) : $res;
1080 }
1081
1082 sub copy_list_with_digest {
1083     my ($list) = @_;
1084
1085     my $sha = Digest::SHA->new('sha1');
1086
1087     my $res = [];
1088     foreach my $entry (@$list) {
1089         my $data = {};
1090         foreach my $k (sort keys %$entry) {
1091             my $v = $entry->{$k};
1092             next if !defined($v);
1093             $data->{$k} = $v;
1094             # Note: digest ignores refs ($rule->{errors})
1095             # since Digest::SHA expects a series of bytes,
1096             #  we have to encode the value here to prevent errors when
1097             #  using utf8 characters (eg. in comments)
1098             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1099         }
1100         push @$res, $data;
1101     }
1102
1103     my $digest = $sha->hexdigest;
1104
1105     foreach my $entry (@$res) {
1106         $entry->{digest} = $digest;
1107     }
1108
1109     return wantarray ? ($res, $digest) : $res;
1110 }
1111
1112 my $rule_properties = {
1113     pos => {
1114         description => "Update rule at position <pos>.",
1115         type => 'integer',
1116         minimum => 0,
1117         optional => 1,
1118     },
1119     digest => get_standard_option('pve-config-digest'),
1120     type => {
1121         type => 'string',
1122         optional => 1,
1123         enum => ['in', 'out', 'group'],
1124     },
1125     action => {
1126         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1127         type => 'string',
1128         optional => 1,
1129         pattern => $security_group_name_pattern,
1130         maxLength => 20,
1131         minLength => 2,
1132     },
1133     macro => {
1134         type => 'string',
1135         optional => 1,
1136         maxLength => 128,
1137     },
1138     iface => get_standard_option('pve-iface', { optional => 1 }),
1139     source => {
1140         type => 'string', format => 'pve-fw-addr-spec',
1141         optional => 1,
1142     },
1143     dest => {
1144         type => 'string', format => 'pve-fw-addr-spec',
1145         optional => 1,
1146     },
1147     proto => {
1148         type => 'string', format => 'pve-fw-protocol-spec',
1149         optional => 1,
1150     },
1151     enable => {
1152         type => 'boolean',
1153         optional => 1,
1154     },
1155     sport => {
1156         type => 'string', format => 'pve-fw-sport-spec',
1157         optional => 1,
1158     },
1159     dport => {
1160         type => 'string', format => 'pve-fw-dport-spec',
1161         optional => 1,
1162     },
1163     comment => {
1164         type => 'string',
1165         optional => 1,
1166     },
1167 };
1168
1169 sub add_rule_properties {
1170     my ($properties) = @_;
1171
1172     foreach my $k (keys %$rule_properties) {
1173         my $h = $rule_properties->{$k};
1174         # copy data, so that we can modify later without side effects
1175         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1176     }
1177
1178     return $properties;
1179 }
1180
1181 sub delete_rule_properties {
1182     my ($rule, $delete_str) = @_;
1183
1184     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1185         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1186             if !defined($rule_properties->{$opt});
1187         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1188             if $opt eq 'type' || $opt eq 'action';
1189         delete $rule->{$opt};
1190     }
1191
1192     return $rule;
1193 }
1194
1195 my $apply_macro = sub {
1196     my ($macro_name, $param, $verify, $ipversion) = @_;
1197
1198     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1199     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1200
1201     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1202         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1203     }
1204
1205     # skip macros which are specific to another ipversion
1206     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1207         return if $ipversion != $required;
1208     }
1209
1210     my $rules = [];
1211
1212     foreach my $templ (@$macro_rules) {
1213         my $rule = {};
1214         my $param_used = {};
1215         foreach my $k (keys %$templ) {
1216             my $v = $templ->{$k};
1217             if ($v eq 'PARAM') {
1218                 $v = $param->{$k};
1219                 $param_used->{$k} = 1;
1220             } elsif ($v eq 'DEST') {
1221                 $v = $param->{dest};
1222                 $param_used->{dest} = 1;
1223             } elsif ($v eq 'SOURCE') {
1224                 $v = $param->{source};
1225                 $param_used->{source} = 1;
1226             }
1227
1228             if (!defined($v)) {
1229                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1230                 raise_param_exc({ macro => $msg }) if $verify;
1231                 die "$msg\n";
1232             }
1233             $rule->{$k} = $v;
1234         }
1235         foreach my $k (keys %$param) {
1236             next if $k eq 'macro';
1237             next if !defined($param->{$k});
1238             next if $param_used->{$k};
1239             if (defined($rule->{$k})) {
1240                 if ($rule->{$k} ne $param->{$k}) {
1241                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1242                     raise_param_exc({ $k => $msg }) if $verify;
1243                     die "$msg\n";
1244                 }
1245             } else {
1246                 $rule->{$k} = $param->{$k};
1247             }
1248         }
1249         push @$rules, $rule;
1250     }
1251
1252     return $rules;
1253 };
1254
1255 my $rule_env_iface_lookup = {
1256     'ct' => 1,
1257     'vm' => 1,
1258     'group' => 0,
1259     'cluster' => 1,
1260     'host' => 1,
1261 };
1262
1263 sub verify_rule {
1264     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1265
1266     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1267
1268     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1269     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1270
1271     my $errors = $rule->{errors} || {};
1272
1273     my $error_count = 0;
1274
1275     my $add_error = sub {
1276         my ($param, $msg)  = @_;
1277         chomp $msg;
1278         raise_param_exc({ $param => $msg }) if !$noerr;
1279         $error_count++;
1280         $errors->{$param} = $msg if !$errors->{$param};
1281     };
1282
1283     my $ipversion;
1284     my $set_ip_version = sub {
1285         my $vers = shift;
1286         if ($vers) {
1287             die "detected mixed ipv4/ipv6 adresses in rule\n"
1288                 if $ipversion && ($vers != $ipversion);
1289             $ipversion = $vers;
1290         }
1291     };
1292
1293     my $check_ipset_or_alias_property = sub {
1294         my ($name, $expected_ipversion) = @_;
1295
1296         if (my $value = $rule->{$name}) {
1297             if ($value =~ m/^\+/) {
1298                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1299                     &$add_error($name, "no such ipset '$1'")
1300                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1301
1302                 } else {
1303                     &$add_error($name, "invalid ipset name '$value'");
1304                 }
1305             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1306                 my $alias = lc($value);
1307                 &$add_error($name, "no such alias '$value'")
1308                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1309                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1310                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1311
1312                 &$set_ip_version($e->{ipversion});
1313             }
1314         }
1315     };
1316
1317     my $type = $rule->{type};
1318     my $action = $rule->{action};
1319
1320     &$add_error('type', "missing property") if !$type;
1321     &$add_error('action', "missing property") if !$action;
1322
1323     if ($type) {
1324         if ($type eq  'in' || $type eq 'out') {
1325             &$add_error('action', "unknown action '$action'")
1326                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1327         } elsif ($type eq 'group') {
1328             &$add_error('type', "security groups not allowed")
1329                 if !$allow_groups;
1330             &$add_error('action', "invalid characters in security group name")
1331                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1332         } else {
1333             &$add_error('type', "unknown rule type '$type'");
1334         }
1335     }
1336
1337     if ($rule->{iface}) {
1338         &$add_error('type', "parameter -i not allowed for this rule type")
1339             if !$allow_iface;
1340         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1341         &$add_error('iface', $@) if $@;
1342         if ($rule_env eq 'vm') {
1343             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1344                 if $rule->{iface} !~  m/^net(\d+)$/;
1345         } elsif ($rule_env eq 'ct') {
1346             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1347                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1348         }
1349     }
1350
1351     if ($rule->{macro}) {
1352         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1353             $rule->{macro} = $preferred_name;
1354         } else {
1355             &$add_error('macro', "unknown macro '$rule->{macro}'");
1356         }
1357     }
1358
1359     if ($rule->{proto}) {
1360         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1361         &$add_error('proto', $@) if $@;
1362         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1363         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1364     }
1365
1366     if ($rule->{dport}) {
1367         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1368         &$add_error('dport', $@) if $@;
1369         &$add_error('proto', "missing property - 'dport' requires this property")
1370             if !$rule->{proto};
1371     }
1372
1373     if ($rule->{sport}) {
1374         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1375         &$add_error('sport', $@) if $@;
1376         &$add_error('proto', "missing property - 'sport' requires this property")
1377             if !$rule->{proto};
1378     }
1379
1380     if ($rule->{source}) {
1381         eval {
1382             my $source_ipversion = parse_address_list($rule->{source});
1383             &$set_ip_version($source_ipversion);
1384         };
1385         &$add_error('source', $@) if $@;
1386         &$check_ipset_or_alias_property('source', $ipversion);
1387     }
1388
1389     if ($rule->{dest}) {
1390         eval {
1391             my $dest_ipversion = parse_address_list($rule->{dest});
1392             &$set_ip_version($dest_ipversion);
1393         };
1394         &$add_error('dest', $@) if $@;
1395         &$check_ipset_or_alias_property('dest', $ipversion);
1396     }
1397
1398     $rule->{ipversion} = $ipversion if $ipversion;
1399
1400     if ($rule->{macro} && !$error_count) {
1401         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1402         if (my $err = $@) {
1403             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1404                 my $eh = $err->{errors};
1405                 foreach my $p (keys %$eh) {
1406                     &$add_error($p, $eh->{$p});
1407                 }
1408             } else {
1409                 &$add_error('macro', "$err");
1410             }
1411         }
1412     }
1413
1414     $rule->{errors} = $errors if $error_count;
1415
1416     return $rule;
1417 }
1418
1419 sub copy_rule_data {
1420     my ($rule, $param) = @_;
1421
1422     foreach my $k (keys %$rule_properties) {
1423         if (defined(my $v = $param->{$k})) {
1424             if ($v eq '' || $v eq '-') {
1425                 delete $rule->{$k};
1426             } else {
1427                 $rule->{$k} = $v;
1428             }
1429         }
1430     }
1431
1432     return $rule;
1433 }
1434
1435 sub rules_modify_permissions {
1436     my ($rule_env) = @_;
1437
1438     if ($rule_env eq 'host') {
1439         return {
1440             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1441         };
1442     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1443         return {
1444             check => ['perm', '/', [ 'Sys.Modify' ]],
1445         };
1446     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1447         return {
1448             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1449         }
1450     }
1451
1452     return undef;
1453 }
1454
1455 sub rules_audit_permissions {
1456     my ($rule_env) = @_;
1457
1458     if ($rule_env eq 'host') {
1459         return {
1460             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1461         };
1462     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1463         return {
1464             check => ['perm', '/', [ 'Sys.Audit' ]],
1465         };
1466     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1467         return {
1468             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1469         }
1470     }
1471
1472     return undef;
1473 }
1474
1475 # core functions
1476 my $bridge_firewall_enabled = 0;
1477
1478 sub enable_bridge_firewall {
1479
1480     return if $bridge_firewall_enabled; # only once
1481
1482     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1483     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1484
1485     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1486     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1487
1488     $bridge_firewall_enabled = 1;
1489 }
1490
1491 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1492
1493 sub iptables_restore_cmdlist {
1494     my ($cmdlist) = @_;
1495
1496     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1497 }
1498
1499 sub ip6tables_restore_cmdlist {
1500     my ($cmdlist) = @_;
1501
1502     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1503 }
1504
1505 sub ipset_restore_cmdlist {
1506     my ($cmdlist) = @_;
1507
1508     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1509 }
1510
1511 sub iptables_get_chains {
1512     my ($iptablescmd) = @_;
1513
1514     $iptablescmd = "iptables" if !$iptablescmd;
1515
1516     my $res = {};
1517
1518     # check what chains we want to track
1519     my $is_pvefw_chain = sub {
1520         my $name = shift;
1521
1522         return 1 if $name =~ m/^PVEFW-\S+$/;
1523
1524         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1525
1526         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1527
1528         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1529
1530         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1531         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1532
1533         return undef;
1534     };
1535
1536     my $table = '';
1537
1538     my $hooks = {};
1539
1540     my $parser = sub {
1541         my $line = shift;
1542
1543         return if $line =~ m/^#/;
1544         return if $line =~ m/^\s*$/;
1545
1546         if ($line =~ m/^\*(\S+)$/) {
1547             $table = $1;
1548             return;
1549         }
1550
1551         return if $table ne 'filter';
1552
1553         if ($line =~ m/^:(\S+)\s/) {
1554             my $chain = $1;
1555             return if !&$is_pvefw_chain($chain);
1556             $res->{$chain} = "unknown";
1557         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1558             my ($chain, $sig) = ($1, $2);
1559             return if !&$is_pvefw_chain($chain);
1560             $res->{$chain} = $sig;
1561         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1562             $hooks->{$1} = 1;
1563         } else {
1564             # simply ignore the rest
1565             return;
1566         }
1567     };
1568
1569     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1570
1571     return wantarray ? ($res, $hooks) : $res;
1572 }
1573
1574 sub iptables_chain_digest {
1575     my ($rules) = @_;
1576     my $digest = Digest::SHA->new('sha1');
1577     foreach my $rule (@$rules) { # order is important
1578         $digest->add($rule);
1579     }
1580     return $digest->b64digest;
1581 }
1582
1583 sub ipset_chain_digest {
1584     my ($rules) = @_;
1585
1586     my $digest = Digest::SHA->new('sha1');
1587     foreach my $rule (sort @$rules) { # note: sorted
1588         $digest->add($rule);
1589     }
1590     return $digest->b64digest;
1591 }
1592
1593 sub ipset_get_chains {
1594
1595     my $res = {};
1596     my $chains = {};
1597
1598     my $parser = sub {
1599         my $line = shift;
1600
1601         return if $line =~ m/^#/;
1602         return if $line =~ m/^\s*$/;
1603         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1604             my $chain = $1;
1605             $line =~ s/\s+$//; # delete trailing white space
1606             push @{$chains->{$chain}}, $line;
1607         } else {
1608             # simply ignore the rest
1609             return;
1610         }
1611     };
1612
1613     run_command("/usr/sbin/ipset save", outfunc => $parser);
1614
1615     # compute digest for each chain
1616     foreach my $chain (keys %$chains) {
1617         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1618     }
1619
1620     return $res;
1621 }
1622
1623 sub ruleset_generate_cmdstr {
1624     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1625
1626     return if defined($rule->{enable}) && !$rule->{enable};
1627     return if $rule->{errors};
1628
1629     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1630
1631     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1632     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1633
1634     my @cmd = ();
1635
1636     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1637     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1638
1639     my $source = $rule->{source};
1640     my $dest = $rule->{dest};
1641
1642     if ($source) {
1643         if ($source =~ m/^\+/) {
1644             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1645                 my $name = $1;
1646                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1647                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1648                     push @cmd, "-m set --match-set ${ipset_chain} src";
1649                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1650                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1651                     push @cmd, "-m set --match-set ${ipset_chain} src";
1652                 } else {
1653                     die "no such ipset '$name'\n";
1654                 }
1655             } else {
1656                 die "invalid security group name '$source'\n";
1657             }
1658         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1659             my $alias = lc($source);
1660             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1661             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1662             die "no such alias '$source'\n" if !$e;
1663             push @cmd, "-s $e->{cidr}";
1664         } elsif ($source =~ m/\-/){
1665             push @cmd, "-m iprange --src-range $source";
1666         } else {
1667             push @cmd, "-s $source";
1668         }
1669     }
1670
1671     if ($dest) {
1672         if ($dest =~ m/^\+/) {
1673             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1674                 my $name = $1;
1675                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1676                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1677                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1678                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1679                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1680                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1681                 } else {
1682                     die "no such ipset '$name'\n";
1683                 }
1684             } else {
1685                 die "invalid security group name '$dest'\n";
1686             }
1687         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1688             my $alias = lc($dest);
1689             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1690             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1691             die "no such alias '$dest'\n" if !$e;
1692             push @cmd, "-d $e->{cidr}";
1693         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1694             push @cmd, "-m iprange --dst-range $dest";
1695         } else {
1696             push @cmd, "-d $dest";
1697         }
1698     }
1699
1700     if ($rule->{proto}) {
1701         push @cmd, "-p $rule->{proto}";
1702
1703         my $multiport = 0;
1704         $multiport++ if $nbdport > 1;
1705         $multiport++ if $nbsport > 1;
1706
1707         push @cmd, "--match multiport" if $multiport;
1708
1709         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1710             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1711
1712         if ($rule->{dport}) {
1713             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1714                 # Note: we use dport to store --icmp-type
1715                 die "unknown icmp-type '$rule->{dport}'\n"
1716                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1717                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1718             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1719                 # Note: we use dport to store --icmpv6-type
1720                 die "unknown icmpv6-type '$rule->{dport}'\n"
1721                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1722                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1723             } else {
1724                 if ($nbdport > 1) {
1725                     if ($multiport == 2) {
1726                         push @cmd,  "--ports $rule->{dport}";
1727                     } else {
1728                         push @cmd, "--dports $rule->{dport}";
1729                     }
1730                 } else {
1731                     push @cmd, "--dport $rule->{dport}";
1732                 }
1733             }
1734         }
1735
1736         if ($rule->{sport}) {
1737             if ($nbsport > 1) {
1738                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1739             } else {
1740                 push @cmd, "--sport $rule->{sport}";
1741             }
1742         }
1743     } elsif ($rule->{dport} || $rule->{sport}) {
1744         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1745         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1746     }
1747
1748     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1749
1750     if (my $action = $rule->{action}) {
1751         $action = $actions->{$action} if defined($actions->{$action});
1752         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1753         push @cmd, $goto ? "-g $action" : "-j $action";
1754     }
1755
1756     return scalar(@cmd) ? join(' ', @cmd) : undef;
1757 }
1758
1759 sub ruleset_generate_rule {
1760     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1761
1762     my $rules;
1763
1764     if ($rule->{macro}) {
1765         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1766     } else {
1767         $rules = [ $rule ];
1768     }
1769
1770     # update all or nothing
1771
1772     my @cmds = ();
1773     foreach my $tmp (@$rules) {
1774         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1775             push @cmds, $cmdstr;
1776         }
1777     }
1778
1779     foreach my $cmdstr (@cmds) {
1780         ruleset_addrule($ruleset, $chain, $cmdstr);
1781     }
1782 }
1783
1784 sub ruleset_generate_rule_insert {
1785     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1786
1787     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1788
1789     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1790         ruleset_insertrule($ruleset, $chain, $cmdstr);
1791     }
1792 }
1793
1794 sub ruleset_create_chain {
1795     my ($ruleset, $chain) = @_;
1796
1797     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1798     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1799
1800     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1801
1802     $ruleset->{$chain} = [];
1803 }
1804
1805 sub ruleset_chain_exist {
1806     my ($ruleset, $chain) = @_;
1807
1808     return $ruleset->{$chain} ? 1 : undef;
1809 }
1810
1811 sub ruleset_addrule {
1812    my ($ruleset, $chain, $rule) = @_;
1813
1814    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1815
1816    push @{$ruleset->{$chain}}, "-A $chain $rule";
1817 }
1818
1819 sub ruleset_insertrule {
1820    my ($ruleset, $chain, $rule) = @_;
1821
1822    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1823
1824    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1825 }
1826
1827 sub get_log_rule_base {
1828     my ($chain, $vmid, $msg, $loglevel) = @_;
1829
1830     die "internal error - no log level" if !defined($loglevel);
1831
1832     $vmid = 0 if !defined($vmid);
1833
1834     # Note: we use special format for prefix to pass further
1835     # info to log daemon (VMID, LOGVELEL and CHAIN)
1836
1837     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1838 }
1839
1840 sub ruleset_addlog {
1841     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1842
1843     return if !defined($loglevel);
1844
1845     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1846
1847     $logrule = "$rule $logrule" if defined($rule);
1848
1849     ruleset_addrule($ruleset, $chain, $logrule);
1850 }
1851
1852 sub ruleset_add_chain_policy {
1853     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1854
1855     if ($policy eq 'ACCEPT') {
1856
1857         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1858                               { ACCEPT =>  $accept_action});
1859
1860     } elsif ($policy eq 'DROP') {
1861
1862         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1863
1864         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1865
1866         ruleset_addrule($ruleset, $chain, "-j DROP");
1867     } elsif ($policy eq 'REJECT') {
1868         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1869
1870         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1871
1872         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1873     } else {
1874         # should not happen
1875         die "internal error: unknown policy '$policy'";
1876     }
1877 }
1878
1879 sub ruleset_chain_add_ndp {
1880     my ($ruleset, $chain, $ipversion, $options) = @_;
1881     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1882
1883     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation -j ACCEPT");
1884     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement -j ACCEPT");
1885     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT");
1886     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT");
1887 }
1888
1889 sub ruleset_chain_add_conn_filters {
1890     my ($ruleset, $chain, $accept) = @_;
1891
1892     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1893     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1894 }
1895
1896 sub ruleset_chain_add_input_filters {
1897     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1898
1899     if ($cluster_conf->{ipset}->{blacklist}){
1900         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1901             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1902             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1903             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1904         }
1905         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1906         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1907     }
1908
1909     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1910         if ($ipversion == 4) {
1911             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1912         }
1913     }
1914
1915     if ($options->{tcpflags}) {
1916         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1917     }
1918 }
1919
1920 sub ruleset_create_vm_chain {
1921     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1922
1923     ruleset_create_chain($ruleset, $chain);
1924     my $accept = generate_nfqueue($options);
1925
1926     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1927         if ($direction eq 'OUT') {
1928             ruleset_generate_rule($ruleset, $chain, $ipversion,
1929                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1930                                     proto => 'udp', sport => 68, dport => 67 });
1931         } else {
1932             ruleset_generate_rule($ruleset, $chain, $ipversion,
1933                                   { action => 'ACCEPT',
1934                                     proto => 'udp', sport => 67, dport => 68 });
1935         }
1936     }
1937
1938     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
1939
1940     if ($direction eq 'OUT') {
1941         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1942             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1943         }
1944         if ($ipfilter_ipset) {
1945             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1946         }
1947         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1948     }
1949 }
1950
1951 sub ruleset_add_group_rule {
1952     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1953
1954     my $group = $rule->{action};
1955     my $group_chain = "GROUP-$group-$direction";
1956     if(!ruleset_chain_exist($ruleset, $group_chain)){
1957         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1958     }
1959
1960     if ($direction eq 'OUT' && $rule->{iface_out}) {
1961         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1962     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1963         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1964     } else {
1965         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1966     }
1967
1968     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1969 }
1970
1971 sub ruleset_generate_vm_rules {
1972     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1973
1974     my $lc_direction = lc($direction);
1975
1976     my $in_accept = generate_nfqueue($options);
1977
1978     foreach my $rule (@$rules) {
1979         next if $rule->{iface} && $rule->{iface} ne $netid;
1980         next if !$rule->{enable} || $rule->{errors};
1981         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1982
1983         if ($rule->{type} eq 'group') {
1984             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1985                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1986         } else {
1987             next if $rule->{type} ne $lc_direction;
1988             eval {
1989                 if ($direction eq 'OUT') {
1990                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1991                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1992                                           undef, $cluster_conf, $vmfw_conf);
1993                 } else {
1994                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1995                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1996                                           undef, $cluster_conf, $vmfw_conf);
1997                 }
1998             };
1999             warn $@ if $@;
2000         }
2001     }
2002 }
2003
2004 sub generate_nfqueue {
2005     my ($options) = @_;
2006
2007     if ($options->{ips}) {
2008         my $action = "NFQUEUE";
2009         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2010             if (defined($3) && defined($1)) {
2011                 $action .= " --queue-balance $1:$3";
2012             } elsif (defined($1)) {
2013                 $action .= " --queue-num $1";
2014             }
2015         }
2016         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2017         return $action;
2018     } else {
2019         return "ACCEPT";
2020     }
2021 }
2022
2023 sub ruleset_generate_vm_ipsrules {
2024     my ($ruleset, $options, $direction, $iface) = @_;
2025
2026     if ($options->{ips} && $direction eq 'IN') {
2027         my $nfqueue = generate_nfqueue($options);
2028
2029         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2030             ruleset_create_chain($ruleset, "PVEFW-IPS");
2031         }
2032
2033         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2034     }
2035 }
2036
2037 sub generate_venet_rules_direction {
2038     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
2039
2040     my $lc_direction = lc($direction);
2041
2042     my $rules = $vmfw_conf->{rules};
2043
2044     my $options = $vmfw_conf->{options};
2045     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2046
2047     my $chain = "venet0-$vmid-$direction";
2048
2049     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2050
2051     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2052
2053     # implement policy
2054     my $policy;
2055
2056     if ($direction eq 'OUT') {
2057         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2058     } else {
2059         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2060     }
2061
2062     my $accept = generate_nfqueue($options);
2063     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2064     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2065
2066     if ($direction eq 'OUT') {
2067         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2068             action => $chain,
2069             source => $ip,
2070             iface_in => 'venet0'});
2071     } else {
2072         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2073             action => $chain,
2074             dest => $ip,
2075             iface_out => 'venet0'});
2076     }
2077 }
2078
2079 sub generate_tap_rules_direction {
2080     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2081
2082     my $lc_direction = lc($direction);
2083
2084     my $rules = $vmfw_conf->{rules};
2085
2086     my $options = $vmfw_conf->{options};
2087     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2088
2089     my $tapchain = "$iface-$direction";
2090
2091     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2092     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2093         if $vmfw_conf->{ipset}->{$ipfilter_name};
2094
2095     # create chain with mac and ip filter
2096     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2097
2098     if ($options->{enable}) {
2099         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2100
2101         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2102
2103         # implement policy
2104         my $policy;
2105
2106         if ($direction eq 'OUT') {
2107             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2108         } else {
2109         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2110         }
2111
2112         my $accept = generate_nfqueue($options);
2113         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2114         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2115     } else {
2116         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2117         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2118     }
2119
2120     # plug the tap chain to bridge chain
2121     if ($direction eq 'IN') {
2122         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2123                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2124     } else {
2125         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2126                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2127     }
2128 }
2129
2130 sub enable_host_firewall {
2131     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2132
2133     my $options = $hostfw_conf->{options};
2134     my $cluster_options = $cluster_conf->{options};
2135     my $rules = $hostfw_conf->{rules};
2136     my $cluster_rules = $cluster_conf->{rules};
2137
2138     # host inbound firewall
2139     my $chain = "PVEFW-HOST-IN";
2140     ruleset_create_chain($ruleset, $chain);
2141
2142     my $loglevel = get_option_log_level($options, "log_level_in");
2143
2144     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2145
2146     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2147     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2148     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2149
2150     # we use RETURN because we need to check also tap rules
2151     my $accept_action = 'RETURN';
2152
2153     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2154
2155     # add host rules first, so that cluster wide rules can be overwritten
2156     foreach my $rule (@$rules, @$cluster_rules) {
2157         next if !$rule->{enable} || $rule->{errors};
2158         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2159
2160         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2161
2162         eval {
2163             if ($rule->{type} eq 'group') {
2164                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2165             } elsif ($rule->{type} eq 'in') {
2166                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2167                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2168                                       undef, $cluster_conf, $hostfw_conf);
2169             }
2170         };
2171         warn $@ if $@;
2172         delete $rule->{iface_in};
2173     }
2174
2175     # allow standard traffic for management ipset (includes cluster network)
2176     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2177     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2178     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2179     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2180     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2181     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2182
2183     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2184     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2185
2186     # corosync
2187     if ($localnet && ($ipversion == $localnet_ver)) {
2188         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2189         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2190         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2191     }
2192
2193     # implement input policy
2194     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2195     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2196
2197     # host outbound firewall
2198     $chain = "PVEFW-HOST-OUT";
2199     ruleset_create_chain($ruleset, $chain);
2200
2201     $loglevel = get_option_log_level($options, "log_level_out");
2202
2203     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2204
2205     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2206     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2207
2208     # we use RETURN because we may want to check other thigs later
2209     $accept_action = 'RETURN';
2210
2211     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2212
2213     # add host rules first, so that cluster wide rules can be overwritten
2214     foreach my $rule (@$rules, @$cluster_rules) {
2215         next if !$rule->{enable} || $rule->{errors};
2216         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2217
2218         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2219         eval {
2220             if ($rule->{type} eq 'group') {
2221                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2222             } elsif ($rule->{type} eq 'out') {
2223                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2224                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2225                                       undef, $cluster_conf, $hostfw_conf);
2226             }
2227         };
2228         warn $@ if $@;
2229         delete $rule->{iface_out};
2230     }
2231
2232     # allow standard traffic on cluster network
2233     if ($localnet && ($ipversion == $localnet_ver)) {
2234         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2235         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2236         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2237         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2238
2239         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2240         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2241         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2242     }
2243
2244     # implement output policy
2245     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2246     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2247
2248     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2249     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2250 }
2251
2252 sub generate_group_rules {
2253     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2254
2255     my $rules = $cluster_conf->{groups}->{$group};
2256
2257     if (!$rules) {
2258         warn "no such security group '$group'\n";
2259         $rules = []; # create empty chain
2260     }
2261
2262     my $chain = "GROUP-${group}-IN";
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 'in';
2269         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2270         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2271                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2272                               undef, $cluster_conf);
2273     }
2274
2275     $chain = "GROUP-${group}-OUT";
2276
2277     ruleset_create_chain($ruleset, $chain);
2278     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2279
2280     foreach my $rule (@$rules) {
2281         next if $rule->{type} ne 'out';
2282         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2283         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2284         # check also other tap rules later
2285         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2286                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2287                               undef, $cluster_conf);
2288     }
2289 }
2290
2291 my $MAX_NETS = 32;
2292 my $valid_netdev_names = {};
2293 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2294     $valid_netdev_names->{"net$i"} = 1;
2295 }
2296
2297 sub parse_fw_rule {
2298     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2299
2300     my $orig_line = $line;
2301
2302     my $rule = {};
2303
2304     # we can add single line comments to the end of the rule
2305     if ($line =~ s/#\s*(.*?)\s*$//) {
2306         $rule->{comment} = decode('utf8', $1);
2307     }
2308
2309     # we can disable a rule when prefixed with '|'
2310
2311     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2312
2313     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2314         die "unable to parse rule: $line\n";
2315
2316     $rule->{type} = lc($1);
2317     $rule->{action} = $2;
2318
2319     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2320         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2321             $rule->{macro} = $1;
2322             $rule->{action} = $2;
2323         }
2324     }
2325
2326     while (length($line)) {
2327         if ($line =~ s/^-i (\S+)\s*//) {
2328             $rule->{iface} = $1;
2329             next;
2330         }
2331
2332         last if $rule->{type} eq 'group';
2333
2334         if ($line =~ s/^-p (\S+)\s*//) {
2335             $rule->{proto} = $1;
2336             next;
2337         }
2338
2339         if ($line =~ s/^-dport (\S+)\s*//) {
2340             $rule->{dport} = $1;
2341             next;
2342         }
2343
2344         if ($line =~ s/^-sport (\S+)\s*//) {
2345             $rule->{sport} = $1;
2346             next;
2347         }
2348         if ($line =~ s/^-source (\S+)\s*//) {
2349             $rule->{source} = $1;
2350             next;
2351         }
2352         if ($line =~ s/^-dest (\S+)\s*//) {
2353             $rule->{dest} = $1;
2354             next;
2355         }
2356
2357         last;
2358     }
2359
2360     die "unable to parse rule parameters: $line\n" if length($line);
2361
2362     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2363     if ($verbose && $rule->{errors}) {
2364         warn "$prefix - errors in rule parameters: $orig_line\n";
2365         foreach my $p (keys %{$rule->{errors}}) {
2366             warn "  $p: $rule->{errors}->{$p}\n";
2367         }
2368     }
2369
2370     return $rule;
2371 }
2372
2373 sub parse_vmfw_option {
2374     my ($line) = @_;
2375
2376     my ($opt, $value);
2377
2378     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2379
2380     if ($line =~ m/^(enable|dhcp|ndp|macfilter|ips):\s*(0|1)\s*$/i) {
2381         $opt = lc($1);
2382         $value = int($2);
2383     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2384         $opt = lc($1);
2385         $value = $2 ? lc($3) : '';
2386     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2387         $opt = lc($1);
2388         $value = uc($3);
2389     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2390         $opt = lc($1);
2391         $value = $2;
2392     } else {
2393         die "can't parse option '$line'\n"
2394     }
2395
2396     return ($opt, $value);
2397 }
2398
2399 sub parse_hostfw_option {
2400     my ($line) = @_;
2401
2402     my ($opt, $value);
2403
2404     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2405
2406     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2407         $opt = lc($1);
2408         $value = int($2);
2409     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2410         $opt = lc($1);
2411         $value = $2 ? lc($3) : '';
2412     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2413         $opt = lc($1);
2414         $value = int($2);
2415     } else {
2416         die "can't parse option '$line'\n"
2417     }
2418
2419     return ($opt, $value);
2420 }
2421
2422 sub parse_clusterfw_option {
2423     my ($line) = @_;
2424
2425     my ($opt, $value);
2426
2427     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2428         $opt = lc($1);
2429         $value = int($2);
2430     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2431         $opt = lc($1);
2432         $value = uc($3);
2433     } else {
2434         die "can't parse option '$line'\n"
2435     }
2436
2437     return ($opt, $value);
2438 }
2439
2440 sub resolve_alias {
2441     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2442
2443     my $alias = lc($cidr);
2444     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2445     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2446
2447     die "no such alias '$cidr'\n" if !$e;;
2448
2449     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2450 }
2451
2452 sub parse_ip_or_cidr {
2453     my ($cidr) = @_;
2454
2455     my $ipversion;
2456
2457     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2458         $cidr =~ s|/128$||;
2459         $ipversion = 6;
2460     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2461         $cidr =~ s|/32$||;
2462         $ipversion = 4;
2463     } else {
2464         die "value does not look like a valid IP address or CIDR network\n";
2465     }
2466
2467     return wantarray ? ($cidr, $ipversion) : $cidr;
2468 }
2469
2470 sub parse_alias {
2471     my ($line) = @_;
2472
2473     # we can add single line comments to the end of the line
2474     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2475
2476     if ($line =~ m/^(\S+)\s(\S+)$/) {
2477         my ($name, $cidr) = ($1, $2);
2478         my $ipversion;
2479
2480         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2481
2482         my $data = {
2483             name => $name,
2484             cidr => $cidr,
2485             ipversion => $ipversion,
2486         };
2487         $data->{comment} = $comment  if $comment;
2488         return $data;
2489     }
2490
2491     return undef;
2492 }
2493
2494 sub generic_fw_config_parser {
2495     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2496
2497     my $section;
2498     my $group;
2499
2500     my $res = $empty_conf;
2501
2502     while (defined(my $line = <$fh>)) {
2503         next if $line =~ m/^#/;
2504         next if $line =~ m/^\s*$/;
2505
2506         chomp $line;
2507
2508         my $linenr = $fh->input_line_number();
2509         my $prefix = "$filename (line $linenr)";
2510
2511         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2512             $section = 'options';
2513             next;
2514         }
2515
2516         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2517             $section = 'aliases';
2518             next;
2519         }
2520
2521         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2522             $section = 'groups';
2523             $group = lc($1);
2524             my $comment = $2;
2525             eval {
2526                 die "security group name too long\n" if length($group) > $max_group_name_length;
2527                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2528             };
2529             if (my $err = $@) {
2530                 ($section, $group, $comment) = undef;
2531                 warn "$prefix: $err";
2532                 next;
2533             }
2534
2535             $res->{$section}->{$group} = [];
2536             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2537                 if $comment;
2538             next;
2539         }
2540
2541         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2542             $section = 'rules';
2543             next;
2544         }
2545
2546         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2547             $section = 'ipset';
2548             $group = lc($1);
2549             my $comment = $2;
2550             eval {
2551                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2552                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2553             };
2554             if (my $err = $@) {
2555                 ($section, $group, $comment) = undef;
2556                 warn "$prefix: $err";
2557                 next;
2558             }
2559
2560             $res->{$section}->{$group} = [];
2561             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2562                 if $comment;
2563             next;
2564         }
2565
2566         if (!$section) {
2567             warn "$prefix: skip line - no section\n";
2568             next;
2569         }
2570
2571         if ($section eq 'options') {
2572             eval {
2573                 my ($opt, $value);
2574                 if ($rule_env eq 'cluster') {
2575                     ($opt, $value) = parse_clusterfw_option($line);
2576                 } elsif ($rule_env eq 'host') {
2577                     ($opt, $value) = parse_hostfw_option($line);
2578                 } else {
2579                     ($opt, $value) = parse_vmfw_option($line);
2580                 }
2581                 $res->{options}->{$opt} = $value;
2582             };
2583             warn "$prefix: $@" if $@;
2584         } elsif ($section eq 'aliases') {
2585             eval {
2586                 my $data = parse_alias($line);
2587                 $res->{aliases}->{lc($data->{name})} = $data;
2588             };
2589             warn "$prefix: $@" if $@;
2590         } elsif ($section eq 'rules') {
2591             my $rule;
2592             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2593             if (my $err = $@) {
2594                 warn "$prefix: $err";
2595                 next;
2596             }
2597             push @{$res->{$section}}, $rule;
2598         } elsif ($section eq 'groups') {
2599             my $rule;
2600             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2601             if (my $err = $@) {
2602                 warn "$prefix: $err";
2603                 next;
2604             }
2605             push @{$res->{$section}->{$group}}, $rule;
2606         } elsif ($section eq 'ipset') {
2607             # we can add single line comments to the end of the rule
2608             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2609
2610             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2611             my $nomatch = $1;
2612             my $cidr = $2;
2613             my $errors;
2614
2615             if ($nomatch && !$feature_ipset_nomatch) {
2616                 $errors->{nomatch} = "nomatch not supported by kernel";
2617             }
2618
2619             eval {
2620                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2621                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2622                 } else {
2623                     $cidr = parse_ip_or_cidr($cidr);
2624                 }
2625             };
2626             if (my $err = $@) {
2627                 chomp $err;
2628                 $errors->{cidr} = $err;
2629             }
2630
2631             my $entry = { cidr => $cidr };
2632             $entry->{nomatch} = 1 if $nomatch;
2633             $entry->{comment} = $comment if $comment;
2634             $entry->{errors} =  $errors if $errors;
2635
2636             if ($verbose && $errors) {
2637                 warn "$prefix - errors in ipset '$group': $line\n";
2638                 foreach my $p (keys %{$errors}) {
2639                     warn "  $p: $errors->{$p}\n";
2640                 }
2641             }
2642
2643             push @{$res->{$section}->{$group}}, $entry;
2644         } else {
2645             warn "$prefix: skip line - unknown section\n";
2646             next;
2647         }
2648     }
2649
2650     return $res;
2651 }
2652
2653 sub parse_hostfw_config {
2654     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2655
2656     my $empty_conf = { rules => [], options => {}};
2657
2658     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2659 }
2660
2661 sub parse_vmfw_config {
2662     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2663
2664     my $empty_conf = {
2665         rules => [],
2666         options => {},
2667         aliases => {},
2668         ipset => {} ,
2669         ipset_comments => {},
2670     };
2671
2672     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2673 }
2674
2675 sub parse_clusterfw_config {
2676     my ($filename, $fh, $verbose) = @_;
2677
2678     my $section;
2679     my $group;
2680
2681     my $empty_conf = {
2682         rules => [],
2683         options => {},
2684         aliases => {},
2685         groups => {},
2686         group_comments => {},
2687         ipset => {} ,
2688         ipset_comments => {},
2689     };
2690
2691     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2692 }
2693
2694 sub run_locked {
2695     my ($code, @param) = @_;
2696
2697     my $timeout = 10;
2698
2699     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2700
2701     die $@ if $@;
2702
2703     return $res;
2704 }
2705
2706 sub read_local_vm_config {
2707
2708     my $openvz = {};
2709     my $qemu = {};
2710
2711     my $vmdata = { openvz => $openvz, qemu => $qemu };
2712
2713     my $vmlist = PVE::Cluster::get_vmlist();
2714     return $vmdata if !$vmlist || !$vmlist->{ids};
2715     my $ids = $vmlist->{ids};
2716
2717     foreach my $vmid (keys %$ids) {
2718         next if !$vmid; # skip VE0
2719         my $d = $ids->{$vmid};
2720         next if !$d->{node} || $d->{node} ne $nodename;
2721         next if !$d->{type};
2722         if ($d->{type} eq 'openvz') {
2723             if ($have_pve_manager) {
2724                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2725                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2726                     $openvz->{$vmid} = $conf;
2727                 }
2728             }
2729         } elsif ($d->{type} eq 'qemu') {
2730             if ($have_qemu_server) {
2731                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2732                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2733                     $qemu->{$vmid} = $conf;
2734                 }
2735             }
2736         }
2737     }
2738
2739     return $vmdata;
2740 };
2741
2742 sub load_vmfw_conf {
2743     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2744
2745     my $vmfw_conf = {};
2746
2747     $dir = $pvefw_conf_dir if !defined($dir);
2748
2749     my $filename = "$dir/$vmid.fw";
2750     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2751         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2752         $vmfw_conf->{vmid} = $vmid;
2753     }
2754
2755     return $vmfw_conf;
2756 }
2757
2758 my $format_rules = sub {
2759     my ($rules, $allow_iface) = @_;
2760
2761     my $raw = '';
2762
2763     foreach my $rule (@$rules) {
2764         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2765             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2766             $raw .= uc($rule->{type});
2767             if ($rule->{macro}) {
2768                 $raw .= " $rule->{macro}($rule->{action})";
2769             } else {
2770                 $raw .= " " . $rule->{action};
2771             }
2772             if ($allow_iface && $rule->{iface}) {
2773                 $raw .= " -i $rule->{iface}";
2774             }
2775
2776             if ($rule->{type} ne  'group')  {
2777                 $raw .= " -source $rule->{source}" if $rule->{source};
2778                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2779                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2780                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2781                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2782             }
2783
2784             $raw .= " # " . encode('utf8', $rule->{comment})
2785                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2786             $raw .= "\n";
2787         } else {
2788             die "unknown rule type '$rule->{type}'";
2789         }
2790     }
2791
2792     return $raw;
2793 };
2794
2795 my $format_options = sub {
2796     my ($options) = @_;
2797
2798     my $raw = '';
2799
2800     $raw .= "[OPTIONS]\n\n";
2801     foreach my $opt (keys %$options) {
2802         $raw .= "$opt: $options->{$opt}\n";
2803     }
2804     $raw .= "\n";
2805
2806     return $raw;
2807 };
2808
2809 my $format_aliases = sub {
2810     my ($aliases) = @_;
2811
2812     my $raw = '';
2813
2814     $raw .= "[ALIASES]\n\n";
2815     foreach my $k (keys %$aliases) {
2816         my $e = $aliases->{$k};
2817         $raw .= "$e->{name} $e->{cidr}";
2818         $raw .= " # " . encode('utf8', $e->{comment})
2819             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2820         $raw .= "\n";
2821     }
2822     $raw .= "\n";
2823
2824     return $raw;
2825 };
2826
2827 my $format_ipsets = sub {
2828     my ($fw_conf) = @_;
2829
2830     my $raw = '';
2831
2832     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2833         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2834             my $utf8comment = encode('utf8', $comment);
2835             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2836         } else {
2837             $raw .= "[IPSET $ipset]\n\n";
2838         }
2839         my $options = $fw_conf->{ipset}->{$ipset};
2840
2841         my $nethash = {};
2842         foreach my $entry (@$options) {
2843             $nethash->{$entry->{cidr}} = $entry;
2844         }
2845
2846         foreach my $cidr (sort keys %$nethash) {
2847             my $entry = $nethash->{$cidr};
2848             my $line = $entry->{nomatch} ? '!' : '';
2849             $line .= $entry->{cidr};
2850             $line .= " # " . encode('utf8', $entry->{comment})
2851                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2852             $raw .= "$line\n";
2853         }
2854
2855         $raw .= "\n";
2856     }
2857
2858     return $raw;
2859 };
2860
2861 sub save_vmfw_conf {
2862     my ($vmid, $vmfw_conf) = @_;
2863
2864     my $raw = '';
2865
2866     my $options = $vmfw_conf->{options};
2867     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2868
2869     my $aliases = $vmfw_conf->{aliases};
2870     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2871
2872     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2873
2874     my $rules = $vmfw_conf->{rules} || [];
2875     if ($rules && scalar(@$rules)) {
2876         $raw .= "[RULES]\n\n";
2877         $raw .= &$format_rules($rules, 1);
2878         $raw .= "\n";
2879     }
2880
2881     mkdir $pvefw_conf_dir;
2882
2883     my $filename = "$pvefw_conf_dir/$vmid.fw";
2884     PVE::Tools::file_set_contents($filename, $raw);
2885 }
2886
2887 sub read_vm_firewall_configs {
2888     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2889
2890     my $vmfw_configs = {};
2891
2892     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2893         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2894         next if !$vmfw_conf->{options}; # skip if file does not exists
2895         $vmfw_configs->{$vmid} = $vmfw_conf;
2896     }
2897     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2898         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2899         next if !$vmfw_conf->{options}; # skip if file does not exists
2900         $vmfw_configs->{$vmid} = $vmfw_conf;
2901     }
2902
2903     return $vmfw_configs;
2904 }
2905
2906 sub get_option_log_level {
2907     my ($options, $k) = @_;
2908
2909     my $v = $options->{$k};
2910     $v = $default_log_level if !defined($v);
2911
2912     return undef if $v eq '' || $v eq 'nolog';
2913
2914     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2915
2916     return $v if ($v >= 0) && ($v <= 7);
2917
2918     warn "unknown log level ($k = '$v')\n";
2919
2920     return undef;
2921 }
2922
2923 sub generate_std_chains {
2924     my ($ruleset, $options, $ipversion) = @_;
2925
2926     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2927
2928     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2929
2930     my $chain;
2931
2932     if ($ipversion == 4) {
2933         # same as shorewall smurflog.
2934         $chain = 'PVEFW-smurflog';
2935         $std_chains->{$chain} = [];
2936
2937         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2938         push @{$std_chains->{$chain}}, "-j DROP";
2939     }
2940
2941     # same as shorewall logflags action.
2942     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2943     $chain = 'PVEFW-logflags';
2944     $std_chains->{$chain} = [];
2945
2946     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2947     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2948     push @{$std_chains->{$chain}}, "-j DROP";
2949
2950     foreach my $chain (keys %$std_chains) {
2951         ruleset_create_chain($ruleset, $chain);
2952         foreach my $rule (@{$std_chains->{$chain}}) {
2953             if (ref($rule)) {
2954                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2955             } else {
2956                 ruleset_addrule($ruleset, $chain, $rule);
2957             }
2958         }
2959     }
2960 }
2961
2962 sub generate_ipset_chains {
2963     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2964
2965     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2966
2967         my $options = $fw_conf->{ipset}->{$ipset};
2968
2969         # remove duplicates
2970         my $nethash = {};
2971         foreach my $entry (@$options) {
2972             next if $entry->{errors}; # skip entries with errors
2973             eval {
2974                 my ($cidr, $ver);
2975                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2976                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2977                 } else {
2978                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2979                 }
2980                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2981                 if ($ver == 6) {
2982                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2983                     $cidr = inet_ntop(AF_INET6, $ipv6);
2984                     $cidr =~ s|/128$||;
2985                 } else {
2986                     $cidr =~ s|/32$||;
2987                 }
2988
2989                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2990             };
2991             warn $@ if $@;
2992         }
2993
2994         foreach my $ipversion (4, 6) {
2995             my $data = $nethash->{$ipversion};
2996
2997             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2998
2999             my $hashsize = scalar(@$options);
3000             if ($hashsize <= 64) {
3001                 $hashsize = 64;
3002             } else {
3003                 $hashsize = round_powerof2($hashsize);
3004             }
3005
3006             my $family = $ipversion == "6" ? "inet6" : "inet";
3007
3008             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3009
3010             foreach my $cidr (sort keys %$data) {
3011                 my $entry = $data->{$cidr};
3012
3013                 my $cmd = "add $name $cidr";
3014                 if ($entry->{nomatch}) {
3015                     if ($feature_ipset_nomatch) {
3016                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3017                     } else {
3018                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3019                     }
3020                 } else {
3021                     push @{$ipset_ruleset->{$name}}, $cmd;
3022                 }
3023             }
3024         }
3025     }
3026 }
3027
3028 sub round_powerof2 {
3029     my ($int) = @_;
3030
3031     $int--;
3032     $int |= $int >> $_ foreach (1,2,4,8,16);
3033     return ++$int;
3034 }
3035
3036 sub load_clusterfw_conf {
3037     my ($filename, $verbose) = @_;
3038
3039     $filename = $clusterfw_conf_filename if !defined($filename);
3040
3041     my $cluster_conf = {};
3042     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3043         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3044     }
3045
3046     return $cluster_conf;
3047 }
3048
3049 sub save_clusterfw_conf {
3050     my ($cluster_conf) = @_;
3051
3052     my $raw = '';
3053
3054     my $options = $cluster_conf->{options};
3055     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3056
3057     my $aliases = $cluster_conf->{aliases};
3058     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3059
3060     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3061
3062     my $rules = $cluster_conf->{rules};
3063     if ($rules && scalar(@$rules)) {
3064         $raw .= "[RULES]\n\n";
3065         $raw .= &$format_rules($rules, 1);
3066         $raw .= "\n";
3067     }
3068
3069     if ($cluster_conf->{groups}) {
3070         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3071             my $rules = $cluster_conf->{groups}->{$group};
3072             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3073                 my $utf8comment = encode('utf8', $comment);
3074                 $raw .= "[group $group] # $utf8comment\n\n";
3075             } else {
3076                 $raw .= "[group $group]\n\n";
3077             }
3078
3079             $raw .= &$format_rules($rules, 0);
3080             $raw .= "\n";
3081         }
3082     }
3083
3084     mkdir $pvefw_conf_dir;
3085     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3086 }
3087
3088 sub load_hostfw_conf {
3089     my ($cluster_conf, $filename, $verbose) = @_;
3090
3091     $filename = $hostfw_conf_filename if !defined($filename);
3092
3093     my $hostfw_conf = {};
3094     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3095         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3096     }
3097     return $hostfw_conf;
3098 }
3099
3100 sub save_hostfw_conf {
3101     my ($hostfw_conf) = @_;
3102
3103     my $raw = '';
3104
3105     my $options = $hostfw_conf->{options};
3106     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3107
3108     my $rules = $hostfw_conf->{rules};
3109     if ($rules && scalar(@$rules)) {
3110         $raw .= "[RULES]\n\n";
3111         $raw .= &$format_rules($rules, 1);
3112         $raw .= "\n";
3113     }
3114
3115     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3116 }
3117
3118 sub compile {
3119     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3120
3121     my $vmfw_configs;
3122
3123     if ($vmdata) { # test mode
3124         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3125         my $filename = "$testdir/cluster.fw";
3126         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3127
3128         $filename = "$testdir/host.fw";
3129         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3130
3131         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3132     } else { # normal operation
3133         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3134
3135         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3136
3137         $vmdata = read_local_vm_config();
3138         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3139     }
3140
3141     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3142     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3143
3144     return ($ruleset, $ipset_ruleset, $rulesetv6);
3145 }
3146
3147 sub compile_iptables_filter {
3148     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3149
3150     $cluster_conf->{ipset}->{venet0} = [];
3151     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3152
3153     my $localnet;
3154     if ($cluster_conf->{aliases}->{local_network}) {
3155         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3156     } else {
3157         my $localnet_ver;
3158         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3159
3160         $cluster_conf->{aliases}->{local_network} = {
3161             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3162     }
3163
3164     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3165
3166     return ({}, {}) if !$cluster_conf->{options}->{enable};
3167
3168     my $ruleset = {};
3169
3170     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3171     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3172
3173     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3174
3175     my $hostfw_options = $hostfw_conf->{options} || {};
3176
3177     # fixme: what log level should we use here?
3178     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3179
3180     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3181
3182
3183     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3184     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3185     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3186
3187     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3188     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3189
3190     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3191
3192     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3193     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3194
3195     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3196     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3197
3198     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3199
3200     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3201
3202     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3203
3204     my $ipset_ruleset = {};
3205
3206     if ($hostfw_enable) {
3207         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3208         warn $@ if $@; # just to be sure - should not happen
3209     }
3210
3211     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3212
3213     # generate firewall rules for QEMU VMs
3214     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3215         eval {
3216             my $conf = $vmdata->{qemu}->{$vmid};
3217             my $vmfw_conf = $vmfw_configs->{$vmid};
3218             return if !$vmfw_conf;
3219
3220             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3221
3222             foreach my $netid (keys %$conf) {
3223                 next if $netid !~ m/^net(\d+)$/;
3224                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3225                 next if !$net->{firewall};
3226                 my $iface = "tap${vmid}i$1";
3227
3228                 my $macaddr = $net->{macaddr};
3229                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3230                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3231                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3232                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3233             }
3234         };
3235         warn $@ if $@; # just to be sure - should not happen
3236     }
3237
3238     # generate firewall rules for OpenVZ containers
3239     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3240         eval {
3241             my $conf = $vmdata->{openvz}->{$vmid};
3242
3243             my $vmfw_conf = $vmfw_configs->{$vmid};
3244             return if !$vmfw_conf;
3245
3246             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3247
3248             if ($vmfw_conf->{options}->{enable}) {
3249                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3250                     my $ip = $conf->{ip_address}->{value};
3251                     $ip =~ s/\s+/,/g;
3252
3253                     my @ips = ();
3254
3255                     foreach my $singleip (split(',', $ip)) {
3256                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3257                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3258                         push @ips, $singleip if $singleip_ver == $ipversion;
3259                     }
3260
3261                     if (scalar(@ips)) {
3262                         my $ip_list = join(',', @ips);
3263                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3264                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3265                     }
3266                 }
3267             }
3268
3269             if ($conf->{netif} && $conf->{netif}->{value}) {
3270                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3271                 foreach my $netid (keys %$netif) {
3272                     my $d = $netif->{$netid};
3273                     my $bridge = $d->{bridge};
3274                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3275                     my $macaddr = $d->{mac};
3276                     my $iface = $d->{host_ifname};
3277                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3278                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3279                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3280                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3281                 }
3282             }
3283         };
3284         warn $@ if $@; # just to be sure - should not happen
3285     }
3286
3287     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3288         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3289     }
3290
3291     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3292
3293     return ($ruleset, $ipset_ruleset);
3294 }
3295
3296 sub get_ruleset_status {
3297     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3298
3299     my $statushash = {};
3300
3301     foreach my $chain (sort keys %$ruleset) {
3302         my $sig = &$digest_fn($ruleset->{$chain});
3303
3304         $statushash->{$chain}->{sig} = $sig;
3305
3306         my $oldsig = $active_chains->{$chain};
3307         if (!defined($oldsig)) {
3308             $statushash->{$chain}->{action} = 'create';
3309         } else {
3310             if ($oldsig eq $sig) {
3311                 $statushash->{$chain}->{action} = 'exists';
3312             } else {
3313                 $statushash->{$chain}->{action} = 'update';
3314             }
3315         }
3316         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3317         foreach my $cmd (@{$ruleset->{$chain}}) {
3318             print "\t$cmd\n" if $verbose;
3319         }
3320     }
3321
3322     foreach my $chain (sort keys %$active_chains) {
3323         if (!defined($ruleset->{$chain})) {
3324             my $sig = $active_chains->{$chain};
3325             $statushash->{$chain}->{action} = 'delete';
3326             $statushash->{$chain}->{sig} = $sig;
3327             print "delete $chain ($sig)\n" if $verbose;
3328         }
3329     }
3330
3331     return $statushash;
3332 }
3333
3334 sub print_sig_rule {
3335     my ($chain, $sig) = @_;
3336
3337     # We just use this to store a SHA1 checksum used to detect changes
3338     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3339 }
3340
3341 sub get_ruleset_cmdlist {
3342     my ($ruleset, $verbose, $iptablescmd) = @_;
3343
3344     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3345
3346     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3347     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3348
3349     # create missing chains first
3350     foreach my $chain (sort keys %$ruleset) {
3351         my $stat = $statushash->{$chain};
3352         die "internal error" if !$stat;
3353         next if $stat->{action} ne 'create';
3354
3355         $cmdlist .= ":$chain - [0:0]\n";
3356     }
3357
3358     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3359         my $chain = "PVEFW-$h";
3360         if ($ruleset->{$chain} && !$hooks->{$h}) {
3361             $cmdlist .= "-A $h -j $chain\n";
3362         }
3363     }
3364
3365     foreach my $chain (sort keys %$ruleset) {
3366         my $stat = $statushash->{$chain};
3367         die "internal error" if !$stat;
3368
3369         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3370             $cmdlist .= "-F $chain\n";
3371             foreach my $cmd (@{$ruleset->{$chain}}) {
3372                 $cmdlist .= "$cmd\n";
3373             }
3374             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3375         } elsif ($stat->{action} eq 'delete') {
3376             die "internal error"; # this should not happen
3377         } elsif ($stat->{action} eq 'exists') {
3378             # do nothing
3379         } else {
3380             die "internal error - unknown status '$stat->{action}'";
3381         }
3382     }
3383
3384     foreach my $chain (keys %$statushash) {
3385         next if $statushash->{$chain}->{action} ne 'delete';
3386         $cmdlist .= "-F $chain\n";
3387     }
3388     foreach my $chain (keys %$statushash) {
3389         next if $statushash->{$chain}->{action} ne 'delete';
3390         next if $chain eq 'PVEFW-INPUT';
3391         next if $chain eq 'PVEFW-OUTPUT';
3392         next if $chain eq 'PVEFW-FORWARD';
3393         $cmdlist .= "-X $chain\n";
3394     }
3395
3396     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3397
3398     $cmdlist .= "COMMIT\n";
3399
3400     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3401 }
3402
3403 sub get_ipset_cmdlist {
3404     my ($ruleset, $verbose) = @_;
3405
3406     my $cmdlist = "";
3407
3408     my $delete_cmdlist = "";
3409
3410     my $active_chains = ipset_get_chains();
3411     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3412
3413     # remove stale _swap chains
3414     foreach my $chain (keys %$active_chains) {
3415         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3416             $cmdlist .= "destroy $chain\n";
3417         }
3418     }
3419
3420     foreach my $chain (keys %$ruleset) {
3421         my $stat = $statushash->{$chain};
3422         die "internal error" if !$stat;
3423
3424         if ($stat->{action} eq 'create') {
3425             foreach my $cmd (@{$ruleset->{$chain}}) {
3426                 $cmdlist .= "$cmd\n";
3427             }
3428         }
3429     }
3430
3431     foreach my $chain (keys %$ruleset) {
3432         my $stat = $statushash->{$chain};
3433         die "internal error" if !$stat;
3434
3435         if ($stat->{action} eq 'update') {
3436             my $chain_swap = $chain."_swap";
3437
3438             foreach my $cmd (@{$ruleset->{$chain}}) {
3439                 $cmd =~ s/$chain/$chain_swap/;
3440                 $cmdlist .= "$cmd\n";
3441             }
3442             $cmdlist .= "swap $chain_swap $chain\n";
3443             $cmdlist .= "flush $chain_swap\n";
3444             $cmdlist .= "destroy $chain_swap\n";
3445         }
3446     }
3447
3448      # the remove unused chains
3449     foreach my $chain (keys %$statushash) {
3450         next if $statushash->{$chain}->{action} ne 'delete';
3451
3452         $delete_cmdlist .= "flush $chain\n";
3453         $delete_cmdlist .= "destroy $chain\n";
3454     }
3455
3456     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3457
3458     return ($cmdlist, $delete_cmdlist, $changes);
3459 }
3460
3461 sub apply_ruleset {
3462     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3463
3464     enable_bridge_firewall();
3465
3466     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3467         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3468
3469     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3470     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3471
3472     if ($verbose) {
3473         if ($ipset_changes) {
3474             print "ipset changes:\n";
3475             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3476             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3477         }
3478
3479         if ($changes) {
3480             print "iptables changes:\n";
3481             print $cmdlist;
3482         }
3483
3484         if ($changesv6) {
3485             print "ip6tables changes:\n";
3486             print $cmdlistv6;
3487         }
3488     }
3489
3490     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3491     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3492
3493     ipset_restore_cmdlist($ipset_create_cmdlist);
3494
3495     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3496     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3497
3498     iptables_restore_cmdlist($cmdlist);
3499
3500     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3501     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3502
3503     ip6tables_restore_cmdlist($cmdlistv6);
3504
3505     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3506     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3507
3508     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3509
3510     # test: re-read status and check if everything is up to date
3511     my $active_chains = iptables_get_chains();
3512     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3513
3514     my $errors;
3515     foreach my $chain (sort keys %$ruleset) {
3516         my $stat = $statushash->{$chain};
3517         if ($stat->{action} ne 'exists') {
3518             warn "unable to update chain '$chain'\n";
3519             $errors = 1;
3520         }
3521     }
3522
3523     my $active_chainsv6 = iptables_get_chains("ip6tables");
3524     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3525
3526     foreach my $chain (sort keys %$rulesetv6) {
3527         my $stat = $statushashv6->{$chain};
3528         if ($stat->{action} ne 'exists') {
3529             warn "unable to update chain '$chain'\n";
3530             $errors = 1;
3531         }
3532     }
3533
3534     die "unable to apply firewall changes\n" if $errors;
3535
3536     update_nf_conntrack_max($hostfw_conf);
3537
3538     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3539
3540 }
3541
3542 sub update_nf_conntrack_max {
3543     my ($hostfw_conf) = @_;
3544
3545     my $max = 65536; # reasonable default
3546
3547     my $options = $hostfw_conf->{options} || {};
3548
3549     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3550         $max = $options->{nf_conntrack_max};
3551         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3552     }
3553
3554     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3555     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3556
3557     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3558
3559     if ($current != $max) {
3560         my $hashsize = int($max/4);
3561         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3562         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3563     }
3564 }
3565
3566 sub update_nf_conntrack_tcp_timeout_established {
3567     my ($hostfw_conf) = @_;
3568
3569     my $options = $hostfw_conf->{options} || {};
3570
3571     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3572
3573     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3574 }
3575
3576 sub remove_pvefw_chains {
3577
3578     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3579     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3580     PVE::Firewall::remove_pvefw_chains_ipset();
3581
3582 }
3583
3584 sub remove_pvefw_chains_iptables {
3585     my ($iptablescmd) = @_;
3586
3587     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3588     my $cmdlist = "*filter\n";
3589
3590     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3591         if ($hooks->{$h}) {
3592             $cmdlist .= "-D $h -j PVEFW-$h\n";
3593         }
3594     }
3595
3596     foreach my $chain (keys %$chash) {
3597         $cmdlist .= "-F $chain\n";
3598     }
3599
3600     foreach my $chain (keys %$chash) {
3601         $cmdlist .= "-X $chain\n";
3602     }
3603     $cmdlist .= "COMMIT\n";
3604
3605     if($iptablescmd eq "ip6tables") {
3606         ip6tables_restore_cmdlist($cmdlist);
3607     } else {
3608         iptables_restore_cmdlist($cmdlist);
3609     }
3610 }
3611
3612 sub remove_pvefw_chains_ipset {
3613
3614     my $ipset_chains = ipset_get_chains();
3615
3616     my $cmdlist = "";
3617
3618     foreach my $chain (keys %$ipset_chains) {
3619         $cmdlist .= "flush $chain\n";
3620         $cmdlist .= "destroy $chain\n";
3621     }
3622
3623     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3624 }
3625
3626 sub init {
3627     my $cluster_conf = load_clusterfw_conf();
3628     my $cluster_options = $cluster_conf->{options};
3629     my $enable = $cluster_options->{enable};
3630
3631     return if !$enable;
3632
3633     # load required modules here
3634 }
3635
3636 sub update {
3637     my $code = sub {
3638
3639         my $cluster_conf = load_clusterfw_conf();
3640         my $cluster_options = $cluster_conf->{options};
3641
3642         if (!$cluster_options->{enable}) {
3643             PVE::Firewall::remove_pvefw_chains();
3644             return;
3645         }
3646
3647         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3648
3649         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3650
3651         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3652     };
3653
3654     run_locked($code);
3655 }
3656
3657 1;