src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 149     ],
 150     'Trcrt' => [
 151         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 152         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 153     ],
 154  };
 155
 156 # imported/converted from: /usr/share/shorewall/macro.*
 157 my $pve_fw_macros = {
 158     'Amanda' => [
 159         "Amanda Backup",
 160         { action => 'PARAM', proto => 'udp', dport => '10080' },
 161         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 162     ],
 163     'Auth' => [
 164         "Auth (identd) traffic",
 165         { action => 'PARAM', proto => 'tcp', dport => '113' },
 166     ],
 167     'BGP' => [
 168         "Border Gateway Protocol traffic",
 169         { action => 'PARAM', proto => 'tcp', dport => '179' },
 170     ],
 171     'BitTorrent' => [
 172         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 173         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 174         { action => 'PARAM', proto => 'udp', dport => '6881' },
 175     ],
 176     'BitTorrent32' => [
 177         "BitTorrent traffic for BitTorrent 3.2 and later",
 178         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 179         { action => 'PARAM', proto => 'udp', dport => '6881' },
 180     ],
 181     'CVS' => [
 182         "Concurrent Versions System pserver traffic",
 183         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 184     ],
 185     'Citrix' => [
 186         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 187         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 188         { action => 'PARAM', proto => 'udp', dport => '1604' },
 189         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 190     ],
 191     'DAAP' => [
 192         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 193         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 194         { action => 'PARAM', proto => 'udp', dport => '3689' },
 195     ],
 196     'DCC' => [
 197         "Distributed Checksum Clearinghouse spam filtering mechanism",
 198         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 199     ],
 200     'DHCPfwd' => [
 201         "Forwarded DHCP traffic",
 202         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 203     ],
 204     'DNS' => [
 205         "Domain Name System traffic (upd and tcp)",
 206         { action => 'PARAM', proto => 'udp', dport => '53' },
 207         { action => 'PARAM', proto => 'tcp', dport => '53' },
 208     ],
 209     'Distcc' => [
 210         "Distributed Compiler service",
 211         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 212     ],
 213     'FTP' => [
 214         "File Transfer Protocol",
 215         { action => 'PARAM', proto => 'tcp', dport => '21' },
 216     ],
 217     'Finger' => [
 218         "Finger protocol (RFC 742)",
 219         { action => 'PARAM', proto => 'tcp', dport => '79' },
 220     ],
 221     'GNUnet' => [
 222         "GNUnet secure peer-to-peer networking traffic",
 223         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 224         { action => 'PARAM', proto => 'udp', dport => '2086' },
 225         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 226         { action => 'PARAM', proto => 'udp', dport => '1080' },
 227     ],
 228     'GRE' => [
 229         "Generic Routing Encapsulation tunneling protocol",
 230         { action => 'PARAM', proto => '47' },
 231     ],
 232     'Git' => [
 233         "Git distributed revision control traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 235     ],
 236     'HKP' => [
 237         "OpenPGP HTTP keyserver protocol traffic",
 238         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 239     ],
 240     'HTTP' => [
 241         "Hypertext Transfer Protocol (WWW)",
 242         { action => 'PARAM', proto => 'tcp', dport => '80' },
 243     ],
 244     'HTTPS' => [
 245         "Hypertext Transfer Protocol (WWW) over SSL",
 246         { action => 'PARAM', proto => 'tcp', dport => '443' },
 247     ],
 248     'ICPV2' => [
 249         "Internet Cache Protocol V2 (Squid) traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '3130' },
 251     ],
 252     'ICQ' => [
 253         "AOL Instant Messenger traffic",
 254         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 255     ],
 256     'IMAP' => [
 257         "Internet Message Access Protocol",
 258         { action => 'PARAM', proto => 'tcp', dport => '143' },
 259     ],
 260     'IMAPS' => [
 261         "Internet Message Access Protocol over SSL",
 262         { action => 'PARAM', proto => 'tcp', dport => '993' },
 263     ],
 264     'IPIP' => [
 265         "IPIP capsulation traffic",
 266         { action => 'PARAM', proto => '94' },
 267     ],
 268     'IPsec' => [
 269         "IPsec traffic",
 270         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 271         { action => 'PARAM', proto => '50' },
 272     ],
 273     'IPsecah' => [
 274         "IPsec authentication (AH) traffic",
 275         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 276         { action => 'PARAM', proto => '51' },
 277     ],
 278     'IPsecnat' => [
 279         "IPsec traffic and Nat-Traversal",
 280         { action => 'PARAM', proto => 'udp', dport => '500' },
 281         { action => 'PARAM', proto => 'udp', dport => '4500' },
 282         { action => 'PARAM', proto => '50' },
 283     ],
 284     'IRC' => [
 285         "Internet Relay Chat traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 287     ],
 288     'Jetdirect' => [
 289         "HP Jetdirect printing",
 290         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 291     ],
 292     'L2TP' => [
 293         "Layer 2 Tunneling Protocol traffic",
 294         { action => 'PARAM', proto => 'udp', dport => '1701' },
 295     ],
 296     'LDAP' => [
 297         "Lightweight Directory Access Protocol traffic",
 298         { action => 'PARAM', proto => 'tcp', dport => '389' },
 299     ],
 300     'LDAPS' => [
 301         "Secure Lightweight Directory Access Protocol traffic",
 302         { action => 'PARAM', proto => 'tcp', dport => '636' },
 303     ],
 304     'MSNP' => [
 305         "Microsoft Notification Protocol",
 306         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 307     ],
 308     'MSSQL' => [
 309         "Microsoft SQL Server",
 310         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 311     ],
 312     'Mail' => [
 313         "Mail traffic (SMTP, SMTPS, Submission)",
 314         { action => 'PARAM', proto => 'tcp', dport => '25' },
 315         { action => 'PARAM', proto => 'tcp', dport => '465' },
 316         { action => 'PARAM', proto => 'tcp', dport => '587' },
 317     ],
 318     'Munin' => [
 319         "Munin networked resource monitoring traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 321     ],
 322     'MySQL' => [
 323         "MySQL server",
 324         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 325     ],
 326     'NNTP' => [
 327         "NNTP traffic (Usenet).",
 328         { action => 'PARAM', proto => 'tcp', dport => '119' },
 329     ],
 330     'NNTPS' => [
 331         "Encrypted NNTP traffic (Usenet)",
 332         { action => 'PARAM', proto => 'tcp', dport => '563' },
 333     ],
 334     'NTP' => [
 335         "Network Time Protocol (ntpd)",
 336         { action => 'PARAM', proto => 'udp', dport => '123' },
 337     ],
 338     'OSPF' => [
 339         "OSPF multicast traffic",
 340         { action => 'PARAM', proto => '89' },
 341     ],
 342     'OpenVPN' => [
 343         "OpenVPN traffic",
 344         { action => 'PARAM', proto => 'udp', dport => '1194' },
 345     ],
 346     'PCA' => [
 347         "Symantec PCAnywere (tm)",
 348         { action => 'PARAM', proto => 'udp', dport => '5632' },
 349         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 350     ],
 351     'POP3' => [
 352         "POP3 traffic",
 353         { action => 'PARAM', proto => 'tcp', dport => '110' },
 354     ],
 355     'POP3S' => [
 356         "Encrypted POP3 traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '995' },
 358     ],
 359     'PPtP' => [
 360         "Point-to-Point Tunneling Protocol",
 361         { action => 'PARAM', proto => '47' },
 362         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 363     ],
 364     'Ping' => [
 365         "ICMP echo request",
 366         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 367     ],
 368     'PostgreSQL' => [
 369         "PostgreSQL server",
 370         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 371     ],
 372     'Printer' => [
 373         "Line Printer protocol printing",
 374         { action => 'PARAM', proto => 'tcp', dport => '515' },
 375     ],
 376     'RDP' => [
 377         "Microsoft Remote Desktop Protocol traffic",
 378         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 379     ],
 380     'RIP' => [
 381         "Routing Information Protocol (bidirectional)",
 382         { action => 'PARAM', proto => 'udp', dport => '520' },
 383     ],
 384     'RNDC' => [
 385         "BIND remote management protocol",
 386         { action => 'PARAM', proto => 'tcp', dport => '953' },
 387     ],
 388     'Razor' => [
 389         "Razor Antispam System",
 390         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 391     ],
 392     'Rdate' => [
 393         "Remote time retrieval (rdate)",
 394         { action => 'PARAM', proto => 'tcp', dport => '37' },
 395     ],
 396     'Rsync' => [
 397         "Rsync server",
 398         { action => 'PARAM', proto => 'tcp', dport => '873' },
 399     ],
 400     'SANE' => [
 401         "SANE network scanning",
 402         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 403     ],
 404     'SMB' => [
 405         "Microsoft SMB traffic",
 406         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 407         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 408         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 409         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 410     ],
 411     'SMBswat' => [
 412         "Samba Web Administration Tool",
 413         { action => 'PARAM', proto => 'tcp', dport => '901' },
 414     ],
 415     'SMTP' => [
 416         "Simple Mail Transfer Protocol",
 417         { action => 'PARAM', proto => 'tcp', dport => '25' },
 418     ],
 419     'SMTPS' => [
 420         "Encrypted Simple Mail Transfer Protocol",
 421         { action => 'PARAM', proto => 'tcp', dport => '465' },
 422     ],
 423     'SNMP' => [
 424         "Simple Network Management Protocol",
 425         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 426         { action => 'PARAM', proto => 'tcp', dport => '161' },
 427     ],
 428     'SPAMD' => [
 429         "Spam Assassin SPAMD traffic",
 430         { action => 'PARAM', proto => 'tcp', dport => '783' },
 431     ],
 432     'SSH' => [
 433         "Secure shell traffic",
 434         { action => 'PARAM', proto => 'tcp', dport => '22' },
 435     ],
 436     'SVN' => [
 437         "Subversion server (svnserve)",
 438         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 439     ],
 440     'SixXS' => [
 441         "SixXS IPv6 Deployment and Tunnel Broker",
 442         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 443         { action => 'PARAM', proto => 'udp', dport => '3740' },
 444         { action => 'PARAM', proto => '41' },
 445         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 446     ],
 447     'Squid' => [
 448         "Squid web proxy traffic",
 449         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 450     ],
 451     'Submission' => [
 452         "Mail message submission traffic",
 453         { action => 'PARAM', proto => 'tcp', dport => '587' },
 454     ],
 455     'Syslog' => [
 456         "Syslog protocol (RFC 5424) traffic",
 457         { action => 'PARAM', proto => 'udp', dport => '514' },
 458         { action => 'PARAM', proto => 'tcp', dport => '514' },
 459     ],
 460     'TFTP' => [
 461         "Trivial File Transfer Protocol traffic",
 462         { action => 'PARAM', proto => 'udp', dport => '69' },
 463     ],
 464     'Telnet' => [
 465         "Telnet traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '23' },
 467     ],
 468     'Telnets' => [
 469         "Telnet over SSL",
 470         { action => 'PARAM', proto => 'tcp', dport => '992' },
 471     ],
 472     'Time' => [
 473         "RFC 868 Time protocol",
 474         { action => 'PARAM', proto => 'tcp', dport => '37' },
 475     ],
 476     'Trcrt' => [
 477         "Traceroute (for up to 30 hops) traffic",
 478         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 479         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 480     ],
 481     'VNC' => [
 482         "VNC traffic for VNC display's 0 - 99",
 483         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 484     ],
 485     'VNCL' => [
 486         "VNC traffic from Vncservers to Vncviewers in listen mode",
 487         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 488     ],
 489     'Web' => [
 490         "WWW traffic (HTTP and HTTPS)",
 491         { action => 'PARAM', proto => 'tcp', dport => '80' },
 492         { action => 'PARAM', proto => 'tcp', dport => '443' },
 493     ],
 494     'Webcache' => [
 495         "Web Cache/Proxy traffic (port 8080)",
 496         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 497     ],
 498     'Webmin' => [
 499         "Webmin traffic",
 500         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 501     ],
 502     'Whois' => [
 503         "Whois (nicname, RFC 3912) traffic",
 504         { action => 'PARAM', proto => 'tcp', dport => '43' },
 505     ],
 506 };
 507
 508 my $pve_fw_parsed_macros;
 509 my $pve_fw_macro_descr;
 510 my $pve_fw_macro_ipversion = {};
 511 my $pve_fw_preferred_macro_names = {};
 512
 513 my $pve_std_chains = {};
 514 $pve_std_chains->{4} = {
 515     'PVEFW-SET-ACCEPT-MARK' => [
 516         "-j MARK --set-mark 1",
 517     ],
 518     'PVEFW-DropBroadcast' => [
 519         # same as shorewall 'Broadcast'
 520         # simply DROP BROADCAST/MULTICAST/ANYCAST
 521         # we can use this to reduce logging
 522         { action => 'DROP', dsttype => 'BROADCAST' },
 523         { action => 'DROP', dsttype => 'MULTICAST' },
 524         { action => 'DROP', dsttype => 'ANYCAST' },
 525         { action => 'DROP', dest => '224.0.0.0/4' },
 526     ],
 527     'PVEFW-reject' => [
 528         # same as shorewall 'reject'
 529         { action => 'DROP', dsttype => 'BROADCAST' },
 530         { action => 'DROP', source => '224.0.0.0/4' },
 531         { action => 'DROP', proto => 'icmp' },
 532         "-p tcp -j REJECT --reject-with tcp-reset",
 533         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 534         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 535         "-j REJECT --reject-with icmp-host-prohibited",
 536     ],
 537     'PVEFW-Drop' => [
 538         # same as shorewall 'Drop', which is equal to DROP,
 539         # but REJECT/DROP some packages to reduce logging,
 540         # and ACCEPT critical ICMP types
 541         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 542         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 543         { action => 'PVEFW-DropBroadcast' },
 544         # ACCEPT critical ICMP types
 545         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 547         # Drop packets with INVALID state
 548         "-m conntrack --ctstate INVALID -j DROP",
 549         # Drop Microsoft SMB noise
 550         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 551         { action => 'DROP', proto => 'udp', dport => '137:139'},
 552         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 553         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 554         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 555         # Drop new/NotSyn traffic so that it doesn't get logged
 556         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 557         # Drop DNS replies
 558         { action => 'DROP', proto => 'udp', sport => 53 },
 559     ],
 560     'PVEFW-Reject' => [
 561         # same as shorewall 'Reject', which is equal to Reject,
 562         # but REJECT/DROP some packages to reduce logging,
 563         # and ACCEPT critical ICMP types
 564         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 565         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 566         { action => 'PVEFW-DropBroadcast' },
 567         # ACCEPT critical ICMP types
 568         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 569         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 570         # Drop packets with INVALID state
 571         "-m conntrack --ctstate INVALID -j DROP",
 572         # Drop Microsoft SMB noise
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 574         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 575         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 576         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 577         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 578         # Drop new/NotSyn traffic so that it doesn't get logged
 579         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 580         # Drop DNS replies
 581         { action => 'DROP', proto => 'udp', sport => 53 },
 582     ],
 583     'PVEFW-tcpflags' => [
 584         # same as shorewall tcpflags action.
 585         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 586         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 588         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 589         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 590         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 591     ],
 592     'PVEFW-smurfs' => [
 593         # same as shorewall smurfs action
 594         # Filter packets for smurfs (packets with a broadcast address as the source).
 595         "-s 0.0.0.0/32 -j RETURN",
 596         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 597         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 598     ],
 599 };
 600
 601 $pve_std_chains->{6} = {
 602     'PVEFW-SET-ACCEPT-MARK' => [
 603         "-j MARK --set-mark 1",
 604     ],
 605     'PVEFW-DropBroadcast' => [
 606         # same as shorewall 'Broadcast'
 607         # simply DROP BROADCAST/MULTICAST/ANYCAST
 608         # we can use this to reduce logging
 609         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 610         # ipv6 addrtype does not work with kernel 2.6.32
 611         #{ action => 'DROP', dsttype => 'MULTICAST' },
 612         #{ action => 'DROP', dsttype => 'ANYCAST' },
 613         { action => 'DROP', dest => 'ff00::/8' },
 614         #{ action => 'DROP', dest => '224.0.0.0/4' },
 615     ],
 616     'PVEFW-reject' => [
 617         # same as shorewall 'reject'
 618         #{ action => 'DROP', dsttype => 'BROADCAST' },
 619         #{ action => 'DROP', source => '224.0.0.0/4' },
 620         { action => 'DROP', proto => 'icmpv6' },
 621         "-p tcp -j REJECT --reject-with tcp-reset",
 622         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 623         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 624         #"-j REJECT --reject-with icmp-host-prohibited",
 625     ],
 626     'PVEFW-Drop' => [
 627         # same as shorewall 'Drop', which is equal to DROP,
 628         # but REJECT/DROP some packages to reduce logging,
 629         # and ACCEPT critical ICMP types
 630         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 631         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 632         { action => 'PVEFW-DropBroadcast' },
 633         # ACCEPT critical ICMP types
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 635         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 636         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 637
 638         # Drop packets with INVALID state
 639         "-m conntrack --ctstate INVALID -j DROP",
 640         # Drop Microsoft SMB noise
 641         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 642         { action => 'DROP', proto => 'udp', dport => '137:139'},
 643         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 644         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 645         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 646         # Drop new/NotSyn traffic so that it doesn't get logged
 647         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 648         # Drop DNS replies
 649         { action => 'DROP', proto => 'udp', sport => 53 },
 650     ],
 651     'PVEFW-Reject' => [
 652         # same as shorewall 'Reject', which is equal to Reject,
 653         # but REJECT/DROP some packages to reduce logging,
 654         # and ACCEPT critical ICMP types
 655         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 656         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 657         { action => 'PVEFW-DropBroadcast' },
 658         # ACCEPT critical ICMP types
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 660         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 661         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 662
 663         # Drop packets with INVALID state
 664         "-m conntrack --ctstate INVALID -j DROP",
 665         # Drop Microsoft SMB noise
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 667         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 668         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 669         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 670         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 671         # Drop new/NotSyn traffic so that it doesn't get logged
 672         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 673         # Drop DNS replies
 674         { action => 'DROP', proto => 'udp', sport => 53 },
 675     ],
 676     'PVEFW-tcpflags' => [
 677         # same as shorewall tcpflags action.
 678         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 679         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 681         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 682         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 683         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 684     ],
 685 };
 686
 687 # iptables -p icmp -h
 688 my $icmp_type_names = {
 689     any => 1,
 690     'echo-reply' => 1,
 691     'destination-unreachable' => 1,
 692     'network-unreachable' => 1,
 693     'host-unreachable' => 1,
 694     'protocol-unreachable' => 1,
 695     'port-unreachable' => 1,
 696     'fragmentation-needed' => 1,
 697     'source-route-failed' => 1,
 698     'network-unknown' => 1,
 699     'host-unknown' => 1,
 700     'network-prohibited' => 1,
 701     'host-prohibited' => 1,
 702     'TOS-network-unreachable' => 1,
 703     'TOS-host-unreachable' => 1,
 704     'communication-prohibited' => 1,
 705     'host-precedence-violation' => 1,
 706     'precedence-cutoff' => 1,
 707     'source-quench' => 1,
 708     'redirect' => 1,
 709     'network-redirect' => 1,
 710     'host-redirect' => 1,
 711     'TOS-network-redirect' => 1,
 712     'TOS-host-redirect' => 1,
 713     'echo-request' => 1,
 714     'router-advertisement' => 1,
 715     'router-solicitation' => 1,
 716     'time-exceeded' => 1,
 717     'ttl-zero-during-transit' => 1,
 718     'ttl-zero-during-reassembly' => 1,
 719     'parameter-problem' => 1,
 720     'ip-header-bad' => 1,
 721     'required-option-missing' => 1,
 722     'timestamp-request' => 1,
 723     'timestamp-reply' => 1,
 724     'address-mask-request' => 1,
 725     'address-mask-reply' => 1,
 726 };
 727
 728 # ip6tables -p icmpv6 -h
 729
 730 my $icmpv6_type_names = {
 731     'any' => 1,
 732     'destination-unreachable' => 1,
 733     'no-route' => 1,
 734     'communication-prohibited' => 1,
 735     'address-unreachable' => 1,
 736     'port-unreachable' => 1,
 737     'packet-too-big' => 1,
 738     'time-exceeded' => 1,
 739     'ttl-zero-during-transit' => 1,
 740     'ttl-zero-during-reassembly' => 1,
 741     'parameter-problem' => 1,
 742     'bad-header' => 1,
 743     'unknown-header-type' => 1,
 744     'unknown-option' => 1,
 745     'echo-request' => 1,
 746     'echo-reply' => 1,
 747     'router-solicitation' => 1,
 748     'router-advertisement' => 1,
 749     'neighbor-solicitation' => 1,
 750     'neighbour-solicitation' => 1,
 751     'neighbor-advertisement' => 1,
 752     'neighbour-advertisement' => 1,
 753     'redirect' => 1,
 754 };
 755
 756 sub init_firewall_macros {
 757
 758     $pve_fw_parsed_macros = {};
 759
 760     my $parse = sub {
 761         my ($k, $macro) = @_;
 762         my $lc_name = lc($k);
 763         $pve_fw_macro_ipversion->{$k} = 0;
 764         while (!ref($macro->[0])) {
 765             my $desc = shift @$macro;
 766             if ($desc eq 'ipv4only') {
 767                 $pve_fw_macro_ipversion->{$k} = 4;
 768             } elsif ($desc eq 'ipv6only') {
 769                 $pve_fw_macro_ipversion->{$k} = 6;
 770             } else {
 771                 $pve_fw_macro_descr->{$k} = $desc;
 772             }
 773         }
 774         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 775         $pve_fw_parsed_macros->{$k} = $macro;
 776     };
 777
 778     foreach my $k (keys %$pve_fw_macros) {
 779         &$parse($k, $pve_fw_macros->{$k});
 780     }
 781
 782     foreach my $k (keys %$pve_ipv6fw_macros) {
 783         next if $pve_fw_parsed_macros->{$k};
 784         &$parse($k, $pve_ipv6fw_macros->{$k});
 785         $pve_fw_macro_ipversion->{$k} = 6;
 786     }
 787 }
 788
 789 init_firewall_macros();
 790
 791 sub get_macros {
 792     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 793 }
 794
 795 my $etc_services;
 796
 797 sub get_etc_services {
 798
 799     return $etc_services if $etc_services;
 800
 801     my $filename = "/etc/services";
 802
 803     my $fh = IO::File->new($filename, O_RDONLY);
 804     if (!$fh) {
 805         warn "unable to read '$filename' - $!\n";
 806         return {};
 807     }
 808
 809     my $services = {};
 810
 811     while (my $line = <$fh>) {
 812         chomp ($line);
 813         next if $line =~m/^#/;
 814         next if ($line =~m/^\s*$/);
 815
 816         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 817             $services->{byid}->{$2}->{name} = $1;
 818             $services->{byid}->{$2}->{port} = $2;
 819             $services->{byid}->{$2}->{$3} = 1;
 820             $services->{byname}->{$1} = $services->{byid}->{$2};
 821         }
 822     }
 823
 824     close($fh);
 825
 826     $etc_services = $services;
 827
 828
 829     return $etc_services;
 830 }
 831
 832 my $etc_protocols;
 833
 834 sub get_etc_protocols {
 835     return $etc_protocols if $etc_protocols;
 836
 837     my $filename = "/etc/protocols";
 838
 839     my $fh = IO::File->new($filename, O_RDONLY);
 840     if (!$fh) {
 841         warn "unable to read '$filename' - $!\n";
 842         return {};
 843     }
 844
 845     my $protocols = {};
 846
 847     while (my $line = <$fh>) {
 848         chomp ($line);
 849         next if $line =~m/^#/;
 850         next if ($line =~m/^\s*$/);
 851
 852         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 853             $protocols->{byid}->{$2}->{name} = $1;
 854             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 855         }
 856     }
 857
 858     close($fh);
 859
 860     # add special case for ICMP v6
 861     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 862     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 863
 864     $etc_protocols = $protocols;
 865
 866     return $etc_protocols;
 867 }
 868
 869 my $ipv4_mask_hash_localnet = {
 870     '255.255.0.0' => 16,
 871     '255.255.128.0' => 17,
 872     '255.255.192.0' => 18,
 873     '255.255.224.0' => 19,
 874     '255.255.240.0' => 20,
 875     '255.255.248.0' => 21,
 876     '255.255.252.0' => 22,
 877     '255.255.254.0' => 23,
 878     '255.255.255.0' => 24,
 879     '255.255.255.128' => 25,
 880     '255.255.255.192' => 26,
 881     '255.255.255.224' => 27,
 882     '255.255.255.240' => 28,
 883     '255.255.255.248' => 29,
 884     '255.255.255.252' => 30,
 885 };
 886
 887 my $__local_network;
 888
 889 sub local_network {
 890     my ($new_value) = @_;
 891
 892     $__local_network = $new_value if defined($new_value);
 893
 894     return $__local_network if defined($__local_network);
 895
 896     eval {
 897         my $nodename = PVE::INotify::nodename();
 898
 899         my $ip = PVE::Cluster::remote_node_ip($nodename);
 900
 901         my $testip = Net::IP->new($ip);
 902
 903         my $routes = PVE::ProcFSTools::read_proc_net_route();
 904         foreach my $entry (@$routes) {
 905             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 906             next if !defined($mask);
 907             return if $mask eq '0.0.0.0';
 908             my $cidr = "$entry->{dest}/$mask";
 909             my $testnet = Net::IP->new($cidr);
 910             if ($testnet->overlaps($testip)) {
 911                 $__local_network = $cidr;
 912                 return;
 913             }
 914         }
 915     };
 916     warn $@ if $@;
 917
 918     return $__local_network;
 919 }
 920
 921 # ipset names are limited to 31 characters,
 922 # and we use '-v4' or '-v6' to indicate IP versions,
 923 # and we use '_swap' suffix for atomic update,
 924 # for example PVEFW-${VMID}-${ipset_name}_swap
 925
 926 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 927
 928 sub compute_ipset_chain_name {
 929     my ($vmid, $ipset_name, $ipversion) = @_;
 930
 931     $vmid = 0 if !defined($vmid);
 932
 933     my $id = "$vmid-${ipset_name}-v$ipversion";
 934
 935     if (length($id) > $max_iptables_ipset_name_length) {
 936         $id = PVE::Tools::fnv31a_hex($id);
 937     }
 938
 939     return "PVEFW-$id";
 940 }
 941
 942 sub compute_ipfilter_ipset_name {
 943     my ($iface) = @_;
 944
 945     return "ipfilter-$iface";
 946 }
 947
 948 sub parse_address_list {
 949     my ($str) = @_;
 950
 951     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 952         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 953         return;
 954     }
 955
 956     if ($str =~ m/^${ip_alias_pattern}$/) {
 957         die "alias name too long\n" if length($str) > $max_alias_name_length;
 958         return;
 959     }
 960
 961     my $count = 0;
 962     my $iprange = 0;
 963     my $ipversion;
 964
 965     foreach my $elem (split(/,/, $str)) {
 966         $count++;
 967         my $ip = Net::IP->new($elem);
 968         if (!$ip) {
 969             my $err = Net::IP::Error();
 970             die "invalid IP address: $err\n";
 971         }
 972         $iprange = 1 if $elem =~ m/-/;
 973
 974         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 975
 976         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 977             if $ipversion && ($new_ipversion != $ipversion);
 978
 979         $ipversion = $new_ipversion;
 980     }
 981
 982     die "you can't use a range in a list\n" if $iprange && $count > 1;
 983
 984     return $ipversion;
 985 }
 986
 987 sub parse_port_name_number_or_range {
 988     my ($str) = @_;
 989
 990     my $services = PVE::Firewall::get_etc_services();
 991     my $count = 0;
 992     my $icmp_port = 0;
 993
 994     foreach my $item (split(/,/, $str)) {
 995         $count++;
 996         if ($item =~ m/^(\d+):(\d+)$/) {
 997             my ($port1, $port2) = ($1, $2);
 998             die "invalid port '$port1'\n" if $port1 > 65535;
 999             die "invalid port '$port2'\n" if $port2 > 65535;
1000         } elsif ($item =~ m/^(\d+)$/) {
1001             my $port = $1;
1002             die "invalid port '$port'\n" if $port > 65535;
1003         } else {
1004             if ($icmp_type_names->{$item}) {
1005                 $icmp_port = 1;
1006             } elsif ($icmpv6_type_names->{$item}) {
1007                 $icmp_port = 1;
1008             } else {
1009                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1010             }
1011         }
1012     }
1013
1014     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1015
1016     return $count;
1017 }
1018
1019 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
1020 sub pve_fw_verify_port_spec {
1021    my ($portstr) = @_;
1022
1023    parse_port_name_number_or_range($portstr);
1024
1025    return $portstr;
1026 }
1027
1028 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1029 sub pve_fw_verify_addr_spec {
1030    my ($list) = @_;
1031
1032    parse_address_list($list);
1033
1034    return $list;
1035 }
1036
1037 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1038 sub pve_fw_verify_protocol_spec {
1039    my ($proto) = @_;
1040
1041    my $protocols = get_etc_protocols();
1042
1043    die "unknown protocol '$proto'\n" if $proto &&
1044        !(defined($protocols->{byname}->{$proto}) ||
1045          defined($protocols->{byid}->{$proto}));
1046
1047    return $proto;
1048 }
1049
1050
1051 # helper function for API
1052
1053 sub copy_opject_with_digest {
1054     my ($object) = @_;
1055
1056     my $sha = Digest::SHA->new('sha1');
1057
1058     my $res = {};
1059     foreach my $k (sort keys %$object) {
1060         my $v = $object->{$k};
1061         next if !defined($v);
1062         $res->{$k} = $v;
1063         $sha->add($k, ':', $v, "\n");
1064     }
1065
1066     my $digest = $sha->hexdigest;
1067
1068     $res->{digest} = $digest;
1069
1070     return wantarray ? ($res, $digest) : $res;
1071 }
1072
1073 sub copy_list_with_digest {
1074     my ($list) = @_;
1075
1076     my $sha = Digest::SHA->new('sha1');
1077
1078     my $res = [];
1079     foreach my $entry (@$list) {
1080         my $data = {};
1081         foreach my $k (sort keys %$entry) {
1082             my $v = $entry->{$k};
1083             next if !defined($v);
1084             $data->{$k} = $v;
1085             # Note: digest ignores refs ($rule->{errors})
1086             # since Digest::SHA expects a series of bytes,
1087             #  we have to encode the value here to prevent errors when
1088             #  using utf8 characters (eg. in comments)
1089             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1090         }
1091         push @$res, $data;
1092     }
1093
1094     my $digest = $sha->hexdigest;
1095
1096     foreach my $entry (@$res) {
1097         $entry->{digest} = $digest;
1098     }
1099
1100     return wantarray ? ($res, $digest) : $res;
1101 }
1102
1103 my $rule_properties = {
1104     pos => {
1105         description => "Update rule at position <pos>.",
1106         type => 'integer',
1107         minimum => 0,
1108         optional => 1,
1109     },
1110     digest => get_standard_option('pve-config-digest'),
1111     type => {
1112         type => 'string',
1113         optional => 1,
1114         enum => ['in', 'out', 'group'],
1115     },
1116     action => {
1117         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1118         type => 'string',
1119         optional => 1,
1120         pattern => $security_group_name_pattern,
1121         maxLength => 20,
1122         minLength => 2,
1123     },
1124     macro => {
1125         type => 'string',
1126         optional => 1,
1127         maxLength => 128,
1128     },
1129     iface => get_standard_option('pve-iface', { optional => 1 }),
1130     source => {
1131         type => 'string', format => 'pve-fw-addr-spec',
1132         optional => 1,
1133     },
1134     dest => {
1135         type => 'string', format => 'pve-fw-addr-spec',
1136         optional => 1,
1137     },
1138     proto => {
1139         type => 'string', format => 'pve-fw-protocol-spec',
1140         optional => 1,
1141     },
1142     enable => {
1143         type => 'boolean',
1144         optional => 1,
1145     },
1146     sport => {
1147         type => 'string', format => 'pve-fw-port-spec',
1148         optional => 1,
1149     },
1150     dport => {
1151         type => 'string', format => 'pve-fw-port-spec',
1152         optional => 1,
1153     },
1154     comment => {
1155         type => 'string',
1156         optional => 1,
1157     },
1158 };
1159
1160 sub add_rule_properties {
1161     my ($properties) = @_;
1162
1163     foreach my $k (keys %$rule_properties) {
1164         my $h = $rule_properties->{$k};
1165         # copy data, so that we can modify later without side effects
1166         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1167     }
1168
1169     return $properties;
1170 }
1171
1172 sub delete_rule_properties {
1173     my ($rule, $delete_str) = @_;
1174
1175     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1176         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1177             if !defined($rule_properties->{$opt});
1178         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1179             if $opt eq 'type' || $opt eq 'action';
1180         delete $rule->{$opt};
1181     }
1182
1183     return $rule;
1184 }
1185
1186 my $apply_macro = sub {
1187     my ($macro_name, $param, $verify, $ipversion) = @_;
1188
1189     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1190     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1191
1192     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1193         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1194     }
1195
1196     # skip macros which are specific to another ipversion
1197     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1198         return if $ipversion != $required;
1199     }
1200
1201     my $rules = [];
1202
1203     foreach my $templ (@$macro_rules) {
1204         my $rule = {};
1205         my $param_used = {};
1206         foreach my $k (keys %$templ) {
1207             my $v = $templ->{$k};
1208             if ($v eq 'PARAM') {
1209                 $v = $param->{$k};
1210                 $param_used->{$k} = 1;
1211             } elsif ($v eq 'DEST') {
1212                 $v = $param->{dest};
1213                 $param_used->{dest} = 1;
1214             } elsif ($v eq 'SOURCE') {
1215                 $v = $param->{source};
1216                 $param_used->{source} = 1;
1217             }
1218
1219             if (!defined($v)) {
1220                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1221                 raise_param_exc({ macro => $msg }) if $verify;
1222                 die "$msg\n";
1223             }
1224             $rule->{$k} = $v;
1225         }
1226         foreach my $k (keys %$param) {
1227             next if $k eq 'macro';
1228             next if !defined($param->{$k});
1229             next if $param_used->{$k};
1230             if (defined($rule->{$k})) {
1231                 if ($rule->{$k} ne $param->{$k}) {
1232                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1233                     raise_param_exc({ $k => $msg }) if $verify;
1234                     die "$msg\n";
1235                 }
1236             } else {
1237                 $rule->{$k} = $param->{$k};
1238             }
1239         }
1240         push @$rules, $rule;
1241     }
1242
1243     return $rules;
1244 };
1245
1246 my $rule_env_iface_lookup = {
1247     'ct' => 1,
1248     'vm' => 1,
1249     'group' => 0,
1250     'cluster' => 1,
1251     'host' => 1,
1252 };
1253
1254 sub verify_rule {
1255     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1256
1257     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1258
1259     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1260     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1261
1262     my $errors = $rule->{errors} || {};
1263
1264     my $error_count = 0;
1265
1266     my $add_error = sub {
1267         my ($param, $msg)  = @_;
1268         chomp $msg;
1269         raise_param_exc({ $param => $msg }) if !$noerr;
1270         $error_count++;
1271         $errors->{$param} = $msg if !$errors->{$param};
1272     };
1273
1274     my $ipversion;
1275     my $set_ip_version = sub {
1276         my $vers = shift;
1277         if ($vers) {
1278             die "detected mixed ipv4/ipv6 adresses in rule\n"
1279                 if $ipversion && ($vers != $ipversion);
1280             $ipversion = $vers;
1281         }
1282     };
1283
1284     my $check_ipset_or_alias_property = sub {
1285         my ($name, $expected_ipversion) = @_;
1286
1287         if (my $value = $rule->{$name}) {
1288             if ($value =~ m/^\+/) {
1289                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1290                     &$add_error($name, "no such ipset '$1'")
1291                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1292
1293                 } else {
1294                     &$add_error($name, "invalid ipset name '$value'");
1295                 }
1296             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1297                 my $alias = lc($value);
1298                 &$add_error($name, "no such alias '$value'")
1299                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1300                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1301                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1302
1303                 &$set_ip_version($e->{ipversion});
1304             }
1305         }
1306     };
1307
1308     my $type = $rule->{type};
1309     my $action = $rule->{action};
1310
1311     &$add_error('type', "missing property") if !$type;
1312     &$add_error('action', "missing property") if !$action;
1313
1314     if ($type) {
1315         if ($type eq  'in' || $type eq 'out') {
1316             &$add_error('action', "unknown action '$action'")
1317                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1318         } elsif ($type eq 'group') {
1319             &$add_error('type', "security groups not allowed")
1320                 if !$allow_groups;
1321             &$add_error('action', "invalid characters in security group name")
1322                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1323         } else {
1324             &$add_error('type', "unknown rule type '$type'");
1325         }
1326     }
1327
1328     if ($rule->{iface}) {
1329         &$add_error('type', "parameter -i not allowed for this rule type")
1330             if !$allow_iface;
1331         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1332         &$add_error('iface', $@) if $@;
1333         if ($rule_env eq 'vm') {
1334             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1335                 if $rule->{iface} !~  m/^net(\d+)$/;
1336         } elsif ($rule_env eq 'ct') {
1337             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1338                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1339         }
1340     }
1341
1342     if ($rule->{macro}) {
1343         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1344             $rule->{macro} = $preferred_name;
1345         } else {
1346             &$add_error('macro', "unknown macro '$rule->{macro}'");
1347         }
1348     }
1349
1350     if ($rule->{proto}) {
1351         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1352         &$add_error('proto', $@) if $@;
1353         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1354         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1355     }
1356
1357     if ($rule->{dport}) {
1358         eval { parse_port_name_number_or_range($rule->{dport}); };
1359         &$add_error('dport', $@) if $@;
1360         &$add_error('proto', "missing property - 'dport' requires this property")
1361             if !$rule->{proto};
1362     }
1363
1364     if ($rule->{sport}) {
1365         eval { parse_port_name_number_or_range($rule->{sport}); };
1366         &$add_error('sport', $@) if $@;
1367         &$add_error('proto', "missing property - 'sport' requires this property")
1368             if !$rule->{proto};
1369     }
1370
1371     if ($rule->{source}) {
1372         eval {
1373             my $source_ipversion = parse_address_list($rule->{source});
1374             &$set_ip_version($source_ipversion);
1375         };
1376         &$add_error('source', $@) if $@;
1377         &$check_ipset_or_alias_property('source', $ipversion);
1378     }
1379
1380     if ($rule->{dest}) {
1381         eval {
1382             my $dest_ipversion = parse_address_list($rule->{dest});
1383             &$set_ip_version($dest_ipversion);
1384         };
1385         &$add_error('dest', $@) if $@;
1386         &$check_ipset_or_alias_property('dest', $ipversion);
1387     }
1388
1389     $rule->{ipversion} = $ipversion if $ipversion;
1390
1391     if ($rule->{macro} && !$error_count) {
1392         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1393         if (my $err = $@) {
1394             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1395                 my $eh = $err->{errors};
1396                 foreach my $p (keys %$eh) {
1397                     &$add_error($p, $eh->{$p});
1398                 }
1399             } else {
1400                 &$add_error('macro', "$err");
1401             }
1402         }
1403     }
1404
1405     $rule->{errors} = $errors if $error_count;
1406
1407     return $rule;
1408 }
1409
1410 sub copy_rule_data {
1411     my ($rule, $param) = @_;
1412
1413     foreach my $k (keys %$rule_properties) {
1414         if (defined(my $v = $param->{$k})) {
1415             if ($v eq '' || $v eq '-') {
1416                 delete $rule->{$k};
1417             } else {
1418                 $rule->{$k} = $v;
1419             }
1420         }
1421     }
1422
1423     return $rule;
1424 }
1425
1426 sub rules_modify_permissions {
1427     my ($rule_env) = @_;
1428
1429     if ($rule_env eq 'host') {
1430         return {
1431             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1432         };
1433     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1434         return {
1435             check => ['perm', '/', [ 'Sys.Modify' ]],
1436         };
1437     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1438         return {
1439             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1440         }
1441     }
1442
1443     return undef;
1444 }
1445
1446 sub rules_audit_permissions {
1447     my ($rule_env) = @_;
1448
1449     if ($rule_env eq 'host') {
1450         return {
1451             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1452         };
1453     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1454         return {
1455             check => ['perm', '/', [ 'Sys.Audit' ]],
1456         };
1457     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1458         return {
1459             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1460         }
1461     }
1462
1463     return undef;
1464 }
1465
1466 # core functions
1467 my $bridge_firewall_enabled = 0;
1468
1469 sub enable_bridge_firewall {
1470
1471     return if $bridge_firewall_enabled; # only once
1472
1473     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1474     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1475
1476     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1477     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1478
1479     $bridge_firewall_enabled = 1;
1480 }
1481
1482 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1483
1484 sub iptables_restore_cmdlist {
1485     my ($cmdlist) = @_;
1486
1487     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1488 }
1489
1490 sub ip6tables_restore_cmdlist {
1491     my ($cmdlist) = @_;
1492
1493     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1494 }
1495
1496 sub ipset_restore_cmdlist {
1497     my ($cmdlist) = @_;
1498
1499     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1500 }
1501
1502 sub iptables_get_chains {
1503     my ($iptablescmd) = @_;
1504
1505     $iptablescmd = "iptables" if !$iptablescmd;
1506
1507     my $res = {};
1508
1509     # check what chains we want to track
1510     my $is_pvefw_chain = sub {
1511         my $name = shift;
1512
1513         return 1 if $name =~ m/^PVEFW-\S+$/;
1514
1515         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1516
1517         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1518
1519         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1520
1521         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1522         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1523
1524         return undef;
1525     };
1526
1527     my $table = '';
1528
1529     my $hooks = {};
1530
1531     my $parser = sub {
1532         my $line = shift;
1533
1534         return if $line =~ m/^#/;
1535         return if $line =~ m/^\s*$/;
1536
1537         if ($line =~ m/^\*(\S+)$/) {
1538             $table = $1;
1539             return;
1540         }
1541
1542         return if $table ne 'filter';
1543
1544         if ($line =~ m/^:(\S+)\s/) {
1545             my $chain = $1;
1546             return if !&$is_pvefw_chain($chain);
1547             $res->{$chain} = "unknown";
1548         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1549             my ($chain, $sig) = ($1, $2);
1550             return if !&$is_pvefw_chain($chain);
1551             $res->{$chain} = $sig;
1552         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1553             $hooks->{$1} = 1;
1554         } else {
1555             # simply ignore the rest
1556             return;
1557         }
1558     };
1559
1560     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1561
1562     return wantarray ? ($res, $hooks) : $res;
1563 }
1564
1565 sub iptables_chain_digest {
1566     my ($rules) = @_;
1567     my $digest = Digest::SHA->new('sha1');
1568     foreach my $rule (@$rules) { # order is important
1569         $digest->add($rule);
1570     }
1571     return $digest->b64digest;
1572 }
1573
1574 sub ipset_chain_digest {
1575     my ($rules) = @_;
1576
1577     my $digest = Digest::SHA->new('sha1');
1578     foreach my $rule (sort @$rules) { # note: sorted
1579         $digest->add($rule);
1580     }
1581     return $digest->b64digest;
1582 }
1583
1584 sub ipset_get_chains {
1585
1586     my $res = {};
1587     my $chains = {};
1588
1589     my $parser = sub {
1590         my $line = shift;
1591
1592         return if $line =~ m/^#/;
1593         return if $line =~ m/^\s*$/;
1594         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1595             my $chain = $1;
1596             $line =~ s/\s+$//; # delete trailing white space
1597             push @{$chains->{$chain}}, $line;
1598         } else {
1599             # simply ignore the rest
1600             return;
1601         }
1602     };
1603
1604     run_command("/usr/sbin/ipset save", outfunc => $parser);
1605
1606     # compute digest for each chain
1607     foreach my $chain (keys %$chains) {
1608         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1609     }
1610
1611     return $res;
1612 }
1613
1614 sub ruleset_generate_cmdstr {
1615     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1616
1617     return if defined($rule->{enable}) && !$rule->{enable};
1618     return if $rule->{errors};
1619
1620     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1621
1622     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1623     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1624
1625     my @cmd = ();
1626
1627     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1628     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1629
1630     my $source = $rule->{source};
1631     my $dest = $rule->{dest};
1632
1633     if ($source) {
1634         if ($source =~ m/^\+/) {
1635             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1636                 my $name = $1;
1637                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1638                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1639                     push @cmd, "-m set --match-set ${ipset_chain} src";
1640                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1641                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1642                     push @cmd, "-m set --match-set ${ipset_chain} src";
1643                 } else {
1644                     die "no such ipset '$name'\n";
1645                 }
1646             } else {
1647                 die "invalid security group name '$source'\n";
1648             }
1649         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1650             my $alias = lc($source);
1651             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1652             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1653             die "no such alias '$source'\n" if !$e;
1654             push @cmd, "-s $e->{cidr}";
1655         } elsif ($source =~ m/\-/){
1656             push @cmd, "-m iprange --src-range $source";
1657         } else {
1658             push @cmd, "-s $source";
1659         }
1660     }
1661
1662     if ($dest) {
1663         if ($dest =~ m/^\+/) {
1664             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1665                 my $name = $1;
1666                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1667                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1668                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1669                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1670                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1671                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1672                 } else {
1673                     die "no such ipset '$name'\n";
1674                 }
1675             } else {
1676                 die "invalid security group name '$dest'\n";
1677             }
1678         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1679             my $alias = lc($dest);
1680             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1681             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1682             die "no such alias '$dest'\n" if !$e;
1683             push @cmd, "-d $e->{cidr}";
1684         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1685             push @cmd, "-m iprange --dst-range $dest";
1686         } else {
1687             push @cmd, "-d $dest";
1688         }
1689     }
1690
1691     if ($rule->{proto}) {
1692         push @cmd, "-p $rule->{proto}";
1693
1694         my $multiport = 0;
1695         $multiport++ if $nbdport > 1;
1696         $multiport++ if $nbsport > 1;
1697
1698         push @cmd, "--match multiport" if $multiport;
1699
1700         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1701             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1702
1703         if ($rule->{dport}) {
1704             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1705                 # Note: we use dport to store --icmp-type
1706                 die "unknown icmp-type '$rule->{dport}'\n"
1707                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1708                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1709             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1710                 # Note: we use dport to store --icmpv6-type
1711                 die "unknown icmpv6-type '$rule->{dport}'\n"
1712                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1713                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1714             } else {
1715                 if ($nbdport > 1) {
1716                     if ($multiport == 2) {
1717                         push @cmd,  "--ports $rule->{dport}";
1718                     } else {
1719                         push @cmd, "--dports $rule->{dport}";
1720                     }
1721                 } else {
1722                     push @cmd, "--dport $rule->{dport}";
1723                 }
1724             }
1725         }
1726
1727         if ($rule->{sport}) {
1728             if ($nbsport > 1) {
1729                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1730             } else {
1731                 push @cmd, "--sport $rule->{sport}";
1732             }
1733         }
1734     } elsif ($rule->{dport} || $rule->{sport}) {
1735         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1736         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1737     }
1738
1739     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1740
1741     if (my $action = $rule->{action}) {
1742         $action = $actions->{$action} if defined($actions->{$action});
1743         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1744         push @cmd, $goto ? "-g $action" : "-j $action";
1745     }
1746
1747     return scalar(@cmd) ? join(' ', @cmd) : undef;
1748 }
1749
1750 sub ruleset_generate_rule {
1751     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1752
1753     my $rules;
1754
1755     if ($rule->{macro}) {
1756         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1757     } else {
1758         $rules = [ $rule ];
1759     }
1760
1761     # update all or nothing
1762
1763     my @cmds = ();
1764     foreach my $tmp (@$rules) {
1765         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1766             push @cmds, $cmdstr;
1767         }
1768     }
1769
1770     foreach my $cmdstr (@cmds) {
1771         ruleset_addrule($ruleset, $chain, $cmdstr);
1772     }
1773 }
1774
1775 sub ruleset_generate_rule_insert {
1776     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1777
1778     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1779
1780     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1781         ruleset_insertrule($ruleset, $chain, $cmdstr);
1782     }
1783 }
1784
1785 sub ruleset_create_chain {
1786     my ($ruleset, $chain) = @_;
1787
1788     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1789     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1790
1791     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1792
1793     $ruleset->{$chain} = [];
1794 }
1795
1796 sub ruleset_chain_exist {
1797     my ($ruleset, $chain) = @_;
1798
1799     return $ruleset->{$chain} ? 1 : undef;
1800 }
1801
1802 sub ruleset_addrule {
1803    my ($ruleset, $chain, $rule) = @_;
1804
1805    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1806
1807    push @{$ruleset->{$chain}}, "-A $chain $rule";
1808 }
1809
1810 sub ruleset_insertrule {
1811    my ($ruleset, $chain, $rule) = @_;
1812
1813    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1814
1815    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1816 }
1817
1818 sub get_log_rule_base {
1819     my ($chain, $vmid, $msg, $loglevel) = @_;
1820
1821     die "internal error - no log level" if !defined($loglevel);
1822
1823     $vmid = 0 if !defined($vmid);
1824
1825     # Note: we use special format for prefix to pass further
1826     # info to log daemon (VMID, LOGVELEL and CHAIN)
1827
1828     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1829 }
1830
1831 sub ruleset_addlog {
1832     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1833
1834     return if !defined($loglevel);
1835
1836     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1837
1838     $logrule = "$rule $logrule" if defined($rule);
1839
1840     ruleset_addrule($ruleset, $chain, $logrule);
1841 }
1842
1843 sub ruleset_add_chain_policy {
1844     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1845
1846     if ($policy eq 'ACCEPT') {
1847
1848         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1849                               { ACCEPT =>  $accept_action});
1850
1851     } elsif ($policy eq 'DROP') {
1852
1853         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1854
1855         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1856
1857         ruleset_addrule($ruleset, $chain, "-j DROP");
1858     } elsif ($policy eq 'REJECT') {
1859         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1860
1861         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1862
1863         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1864     } else {
1865         # should not happen
1866         die "internal error: unknown policy '$policy'";
1867     }
1868 }
1869
1870 sub ruleset_chain_add_ndp {
1871     my ($ruleset, $chain, $ipversion, $options) = @_;
1872     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1873
1874     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation -j ACCEPT");
1875     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement -j ACCEPT");
1876     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT");
1877     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT");
1878 }
1879
1880 sub ruleset_chain_add_conn_filters {
1881     my ($ruleset, $chain, $accept) = @_;
1882
1883     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1884     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1885 }
1886
1887 sub ruleset_chain_add_input_filters {
1888     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1889
1890     if ($cluster_conf->{ipset}->{blacklist}){
1891         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1892             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1893             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1894             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1895         }
1896         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1897         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1898     }
1899
1900     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1901         if ($ipversion == 4) {
1902             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1903         }
1904     }
1905
1906     if ($options->{tcpflags}) {
1907         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1908     }
1909 }
1910
1911 sub ruleset_create_vm_chain {
1912     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1913
1914     ruleset_create_chain($ruleset, $chain);
1915     my $accept = generate_nfqueue($options);
1916
1917     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1918         if ($direction eq 'OUT') {
1919             ruleset_generate_rule($ruleset, $chain, $ipversion,
1920                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1921                                     proto => 'udp', sport => 68, dport => 67 });
1922         } else {
1923             ruleset_generate_rule($ruleset, $chain, $ipversion,
1924                                   { action => 'ACCEPT',
1925                                     proto => 'udp', sport => 67, dport => 68 });
1926         }
1927     }
1928
1929     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
1930
1931     if ($direction eq 'OUT') {
1932         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1933             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1934         }
1935         if ($ipfilter_ipset) {
1936             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1937         }
1938         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1939     }
1940 }
1941
1942 sub ruleset_add_group_rule {
1943     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1944
1945     my $group = $rule->{action};
1946     my $group_chain = "GROUP-$group-$direction";
1947     if(!ruleset_chain_exist($ruleset, $group_chain)){
1948         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1949     }
1950
1951     if ($direction eq 'OUT' && $rule->{iface_out}) {
1952         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1953     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1954         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1955     } else {
1956         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1957     }
1958
1959     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1960 }
1961
1962 sub ruleset_generate_vm_rules {
1963     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1964
1965     my $lc_direction = lc($direction);
1966
1967     my $in_accept = generate_nfqueue($options);
1968
1969     foreach my $rule (@$rules) {
1970         next if $rule->{iface} && $rule->{iface} ne $netid;
1971         next if !$rule->{enable} || $rule->{errors};
1972         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1973
1974         if ($rule->{type} eq 'group') {
1975             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1976                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1977         } else {
1978             next if $rule->{type} ne $lc_direction;
1979             eval {
1980                 if ($direction eq 'OUT') {
1981                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1982                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1983                                           undef, $cluster_conf, $vmfw_conf);
1984                 } else {
1985                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1986                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1987                                           undef, $cluster_conf, $vmfw_conf);
1988                 }
1989             };
1990             warn $@ if $@;
1991         }
1992     }
1993 }
1994
1995 sub generate_nfqueue {
1996     my ($options) = @_;
1997
1998     if ($options->{ips}) {
1999         my $action = "NFQUEUE";
2000         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2001             if (defined($3) && defined($1)) {
2002                 $action .= " --queue-balance $1:$3";
2003             } elsif (defined($1)) {
2004                 $action .= " --queue-num $1";
2005             }
2006         }
2007         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2008         return $action;
2009     } else {
2010         return "ACCEPT";
2011     }
2012 }
2013
2014 sub ruleset_generate_vm_ipsrules {
2015     my ($ruleset, $options, $direction, $iface) = @_;
2016
2017     if ($options->{ips} && $direction eq 'IN') {
2018         my $nfqueue = generate_nfqueue($options);
2019
2020         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2021             ruleset_create_chain($ruleset, "PVEFW-IPS");
2022         }
2023
2024         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2025     }
2026 }
2027
2028 sub generate_venet_rules_direction {
2029     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
2030
2031     my $lc_direction = lc($direction);
2032
2033     my $rules = $vmfw_conf->{rules};
2034
2035     my $options = $vmfw_conf->{options};
2036     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2037
2038     my $chain = "venet0-$vmid-$direction";
2039
2040     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2041
2042     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2043
2044     # implement policy
2045     my $policy;
2046
2047     if ($direction eq 'OUT') {
2048         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2049     } else {
2050         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2051     }
2052
2053     my $accept = generate_nfqueue($options);
2054     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2055     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2056
2057     if ($direction eq 'OUT') {
2058         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2059             action => $chain,
2060             source => $ip,
2061             iface_in => 'venet0'});
2062     } else {
2063         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2064             action => $chain,
2065             dest => $ip,
2066             iface_out => 'venet0'});
2067     }
2068 }
2069
2070 sub generate_tap_rules_direction {
2071     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2072
2073     my $lc_direction = lc($direction);
2074
2075     my $rules = $vmfw_conf->{rules};
2076
2077     my $options = $vmfw_conf->{options};
2078     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2079
2080     my $tapchain = "$iface-$direction";
2081
2082     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2083     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2084         if $vmfw_conf->{ipset}->{$ipfilter_name};
2085
2086     # create chain with mac and ip filter
2087     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2088
2089     if ($options->{enable}) {
2090         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2091
2092         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2093
2094         # implement policy
2095         my $policy;
2096
2097         if ($direction eq 'OUT') {
2098             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2099         } else {
2100         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2101         }
2102
2103         my $accept = generate_nfqueue($options);
2104         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2105         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2106     } else {
2107         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2108         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2109     }
2110
2111     # plug the tap chain to bridge chain
2112     if ($direction eq 'IN') {
2113         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2114                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2115     } else {
2116         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2117                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2118     }
2119 }
2120
2121 sub enable_host_firewall {
2122     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2123
2124     my $options = $hostfw_conf->{options};
2125     my $cluster_options = $cluster_conf->{options};
2126     my $rules = $hostfw_conf->{rules};
2127     my $cluster_rules = $cluster_conf->{rules};
2128
2129     # host inbound firewall
2130     my $chain = "PVEFW-HOST-IN";
2131     ruleset_create_chain($ruleset, $chain);
2132
2133     my $loglevel = get_option_log_level($options, "log_level_in");
2134
2135     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2136
2137     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2138     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2139     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2140
2141     # we use RETURN because we need to check also tap rules
2142     my $accept_action = 'RETURN';
2143
2144     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2145
2146     # add host rules first, so that cluster wide rules can be overwritten
2147     foreach my $rule (@$rules, @$cluster_rules) {
2148         next if !$rule->{enable} || $rule->{errors};
2149         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2150
2151         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2152
2153         eval {
2154             if ($rule->{type} eq 'group') {
2155                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2156             } elsif ($rule->{type} eq 'in') {
2157                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2158                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2159                                       undef, $cluster_conf, $hostfw_conf);
2160             }
2161         };
2162         warn $@ if $@;
2163         delete $rule->{iface_in};
2164     }
2165
2166     # allow standard traffic for management ipset (includes cluster network)
2167     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2168     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2169     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2170     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2171     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2172     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2173
2174     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2175     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2176
2177     # corosync
2178     if ($localnet && ($ipversion == $localnet_ver)) {
2179         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2180         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2181         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2182     }
2183
2184     # implement input policy
2185     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2186     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2187
2188     # host outbound firewall
2189     $chain = "PVEFW-HOST-OUT";
2190     ruleset_create_chain($ruleset, $chain);
2191
2192     $loglevel = get_option_log_level($options, "log_level_out");
2193
2194     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2195
2196     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2197     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2198
2199     # we use RETURN because we may want to check other thigs later
2200     $accept_action = 'RETURN';
2201
2202     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2203
2204     # add host rules first, so that cluster wide rules can be overwritten
2205     foreach my $rule (@$rules, @$cluster_rules) {
2206         next if !$rule->{enable} || $rule->{errors};
2207         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2208
2209         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2210         eval {
2211             if ($rule->{type} eq 'group') {
2212                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2213             } elsif ($rule->{type} eq 'out') {
2214                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2215                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2216                                       undef, $cluster_conf, $hostfw_conf);
2217             }
2218         };
2219         warn $@ if $@;
2220         delete $rule->{iface_out};
2221     }
2222
2223     # allow standard traffic on cluster network
2224     if ($localnet && ($ipversion == $localnet_ver)) {
2225         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2226         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2227         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2228         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2229
2230         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2231         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2232         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2233     }
2234
2235     # implement output policy
2236     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2237     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2238
2239     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2240     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2241 }
2242
2243 sub generate_group_rules {
2244     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2245
2246     my $rules = $cluster_conf->{groups}->{$group};
2247
2248     if (!$rules) {
2249         warn "no such security group '$group'\n";
2250         $rules = []; # create empty chain
2251     }
2252
2253     my $chain = "GROUP-${group}-IN";
2254
2255     ruleset_create_chain($ruleset, $chain);
2256     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2257
2258     foreach my $rule (@$rules) {
2259         next if $rule->{type} ne 'in';
2260         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2261         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2262                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2263                               undef, $cluster_conf);
2264     }
2265
2266     $chain = "GROUP-${group}-OUT";
2267
2268     ruleset_create_chain($ruleset, $chain);
2269     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2270
2271     foreach my $rule (@$rules) {
2272         next if $rule->{type} ne 'out';
2273         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2274         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2275         # check also other tap rules later
2276         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2277                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2278                               undef, $cluster_conf);
2279     }
2280 }
2281
2282 my $MAX_NETS = 32;
2283 my $valid_netdev_names = {};
2284 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2285     $valid_netdev_names->{"net$i"} = 1;
2286 }
2287
2288 sub parse_fw_rule {
2289     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2290
2291     my $orig_line = $line;
2292
2293     my $rule = {};
2294
2295     # we can add single line comments to the end of the rule
2296     if ($line =~ s/#\s*(.*?)\s*$//) {
2297         $rule->{comment} = decode('utf8', $1);
2298     }
2299
2300     # we can disable a rule when prefixed with '|'
2301
2302     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2303
2304     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2305         die "unable to parse rule: $line\n";
2306
2307     $rule->{type} = lc($1);
2308     $rule->{action} = $2;
2309
2310     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2311         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2312             $rule->{macro} = $1;
2313             $rule->{action} = $2;
2314         }
2315     }
2316
2317     while (length($line)) {
2318         if ($line =~ s/^-i (\S+)\s*//) {
2319             $rule->{iface} = $1;
2320             next;
2321         }
2322
2323         last if $rule->{type} eq 'group';
2324
2325         if ($line =~ s/^-p (\S+)\s*//) {
2326             $rule->{proto} = $1;
2327             next;
2328         }
2329
2330         if ($line =~ s/^-dport (\S+)\s*//) {
2331             $rule->{dport} = $1;
2332             next;
2333         }
2334
2335         if ($line =~ s/^-sport (\S+)\s*//) {
2336             $rule->{sport} = $1;
2337             next;
2338         }
2339         if ($line =~ s/^-source (\S+)\s*//) {
2340             $rule->{source} = $1;
2341             next;
2342         }
2343         if ($line =~ s/^-dest (\S+)\s*//) {
2344             $rule->{dest} = $1;
2345             next;
2346         }
2347
2348         last;
2349     }
2350
2351     die "unable to parse rule parameters: $line\n" if length($line);
2352
2353     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2354     if ($verbose && $rule->{errors}) {
2355         warn "$prefix - errors in rule parameters: $orig_line\n";
2356         foreach my $p (keys %{$rule->{errors}}) {
2357             warn "  $p: $rule->{errors}->{$p}\n";
2358         }
2359     }
2360
2361     return $rule;
2362 }
2363
2364 sub parse_vmfw_option {
2365     my ($line) = @_;
2366
2367     my ($opt, $value);
2368
2369     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2370
2371     if ($line =~ m/^(enable|dhcp|ndp|macfilter|ips):\s*(0|1)\s*$/i) {
2372         $opt = lc($1);
2373         $value = int($2);
2374     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2375         $opt = lc($1);
2376         $value = $2 ? lc($3) : '';
2377     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2378         $opt = lc($1);
2379         $value = uc($3);
2380     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2381         $opt = lc($1);
2382         $value = $2;
2383     } else {
2384         die "can't parse option '$line'\n"
2385     }
2386
2387     return ($opt, $value);
2388 }
2389
2390 sub parse_hostfw_option {
2391     my ($line) = @_;
2392
2393     my ($opt, $value);
2394
2395     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2396
2397     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2398         $opt = lc($1);
2399         $value = int($2);
2400     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2401         $opt = lc($1);
2402         $value = $2 ? lc($3) : '';
2403     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2404         $opt = lc($1);
2405         $value = int($2);
2406     } else {
2407         die "can't parse option '$line'\n"
2408     }
2409
2410     return ($opt, $value);
2411 }
2412
2413 sub parse_clusterfw_option {
2414     my ($line) = @_;
2415
2416     my ($opt, $value);
2417
2418     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2419         $opt = lc($1);
2420         $value = int($2);
2421     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2422         $opt = lc($1);
2423         $value = uc($3);
2424     } else {
2425         die "can't parse option '$line'\n"
2426     }
2427
2428     return ($opt, $value);
2429 }
2430
2431 sub resolve_alias {
2432     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2433
2434     my $alias = lc($cidr);
2435     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2436     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2437
2438     die "no such alias '$cidr'\n" if !$e;;
2439
2440     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2441 }
2442
2443 sub parse_ip_or_cidr {
2444     my ($cidr) = @_;
2445
2446     my $ipversion;
2447
2448     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2449         $cidr =~ s|/128$||;
2450         $ipversion = 6;
2451     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2452         $cidr =~ s|/32$||;
2453         $ipversion = 4;
2454     } else {
2455         die "value does not look like a valid IP address or CIDR network\n";
2456     }
2457
2458     return wantarray ? ($cidr, $ipversion) : $cidr;
2459 }
2460
2461 sub parse_alias {
2462     my ($line) = @_;
2463
2464     # we can add single line comments to the end of the line
2465     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2466
2467     if ($line =~ m/^(\S+)\s(\S+)$/) {
2468         my ($name, $cidr) = ($1, $2);
2469         my $ipversion;
2470
2471         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2472
2473         my $data = {
2474             name => $name,
2475             cidr => $cidr,
2476             ipversion => $ipversion,
2477         };
2478         $data->{comment} = $comment  if $comment;
2479         return $data;
2480     }
2481
2482     return undef;
2483 }
2484
2485 sub generic_fw_config_parser {
2486     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2487
2488     my $section;
2489     my $group;
2490
2491     my $res = $empty_conf;
2492
2493     while (defined(my $line = <$fh>)) {
2494         next if $line =~ m/^#/;
2495         next if $line =~ m/^\s*$/;
2496
2497         chomp $line;
2498
2499         my $linenr = $fh->input_line_number();
2500         my $prefix = "$filename (line $linenr)";
2501
2502         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2503             $section = 'options';
2504             next;
2505         }
2506
2507         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2508             $section = 'aliases';
2509             next;
2510         }
2511
2512         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2513             $section = 'groups';
2514             $group = lc($1);
2515             my $comment = $2;
2516             eval {
2517                 die "security group name too long\n" if length($group) > $max_group_name_length;
2518                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2519             };
2520             if (my $err = $@) {
2521                 ($section, $group, $comment) = undef;
2522                 warn "$prefix: $err";
2523                 next;
2524             }
2525
2526             $res->{$section}->{$group} = [];
2527             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2528                 if $comment;
2529             next;
2530         }
2531
2532         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2533             $section = 'rules';
2534             next;
2535         }
2536
2537         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2538             $section = 'ipset';
2539             $group = lc($1);
2540             my $comment = $2;
2541             eval {
2542                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2543                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2544             };
2545             if (my $err = $@) {
2546                 ($section, $group, $comment) = undef;
2547                 warn "$prefix: $err";
2548                 next;
2549             }
2550
2551             $res->{$section}->{$group} = [];
2552             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2553                 if $comment;
2554             next;
2555         }
2556
2557         if (!$section) {
2558             warn "$prefix: skip line - no section\n";
2559             next;
2560         }
2561
2562         if ($section eq 'options') {
2563             eval {
2564                 my ($opt, $value);
2565                 if ($rule_env eq 'cluster') {
2566                     ($opt, $value) = parse_clusterfw_option($line);
2567                 } elsif ($rule_env eq 'host') {
2568                     ($opt, $value) = parse_hostfw_option($line);
2569                 } else {
2570                     ($opt, $value) = parse_vmfw_option($line);
2571                 }
2572                 $res->{options}->{$opt} = $value;
2573             };
2574             warn "$prefix: $@" if $@;
2575         } elsif ($section eq 'aliases') {
2576             eval {
2577                 my $data = parse_alias($line);
2578                 $res->{aliases}->{lc($data->{name})} = $data;
2579             };
2580             warn "$prefix: $@" if $@;
2581         } elsif ($section eq 'rules') {
2582             my $rule;
2583             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2584             if (my $err = $@) {
2585                 warn "$prefix: $err";
2586                 next;
2587             }
2588             push @{$res->{$section}}, $rule;
2589         } elsif ($section eq 'groups') {
2590             my $rule;
2591             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2592             if (my $err = $@) {
2593                 warn "$prefix: $err";
2594                 next;
2595             }
2596             push @{$res->{$section}->{$group}}, $rule;
2597         } elsif ($section eq 'ipset') {
2598             # we can add single line comments to the end of the rule
2599             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2600
2601             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2602             my $nomatch = $1;
2603             my $cidr = $2;
2604             my $errors;
2605
2606             if ($nomatch && !$feature_ipset_nomatch) {
2607                 $errors->{nomatch} = "nomatch not supported by kernel";
2608             }
2609
2610             eval {
2611                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2612                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2613                 } else {
2614                     $cidr = parse_ip_or_cidr($cidr);
2615                 }
2616             };
2617             if (my $err = $@) {
2618                 chomp $err;
2619                 $errors->{cidr} = $err;
2620             }
2621
2622             my $entry = { cidr => $cidr };
2623             $entry->{nomatch} = 1 if $nomatch;
2624             $entry->{comment} = $comment if $comment;
2625             $entry->{errors} =  $errors if $errors;
2626
2627             if ($verbose && $errors) {
2628                 warn "$prefix - errors in ipset '$group': $line\n";
2629                 foreach my $p (keys %{$errors}) {
2630                     warn "  $p: $errors->{$p}\n";
2631                 }
2632             }
2633
2634             push @{$res->{$section}->{$group}}, $entry;
2635         } else {
2636             warn "$prefix: skip line - unknown section\n";
2637             next;
2638         }
2639     }
2640
2641     return $res;
2642 }
2643
2644 sub parse_hostfw_config {
2645     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2646
2647     my $empty_conf = { rules => [], options => {}};
2648
2649     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2650 }
2651
2652 sub parse_vmfw_config {
2653     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2654
2655     my $empty_conf = {
2656         rules => [],
2657         options => {},
2658         aliases => {},
2659         ipset => {} ,
2660         ipset_comments => {},
2661     };
2662
2663     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2664 }
2665
2666 sub parse_clusterfw_config {
2667     my ($filename, $fh, $verbose) = @_;
2668
2669     my $section;
2670     my $group;
2671
2672     my $empty_conf = {
2673         rules => [],
2674         options => {},
2675         aliases => {},
2676         groups => {},
2677         group_comments => {},
2678         ipset => {} ,
2679         ipset_comments => {},
2680     };
2681
2682     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2683 }
2684
2685 sub run_locked {
2686     my ($code, @param) = @_;
2687
2688     my $timeout = 10;
2689
2690     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2691
2692     die $@ if $@;
2693
2694     return $res;
2695 }
2696
2697 sub read_local_vm_config {
2698
2699     my $openvz = {};
2700     my $qemu = {};
2701
2702     my $vmdata = { openvz => $openvz, qemu => $qemu };
2703
2704     my $vmlist = PVE::Cluster::get_vmlist();
2705     return $vmdata if !$vmlist || !$vmlist->{ids};
2706     my $ids = $vmlist->{ids};
2707
2708     foreach my $vmid (keys %$ids) {
2709         next if !$vmid; # skip VE0
2710         my $d = $ids->{$vmid};
2711         next if !$d->{node} || $d->{node} ne $nodename;
2712         next if !$d->{type};
2713         if ($d->{type} eq 'openvz') {
2714             if ($have_pve_manager) {
2715                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2716                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2717                     $openvz->{$vmid} = $conf;
2718                 }
2719             }
2720         } elsif ($d->{type} eq 'qemu') {
2721             if ($have_qemu_server) {
2722                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2723                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2724                     $qemu->{$vmid} = $conf;
2725                 }
2726             }
2727         }
2728     }
2729
2730     return $vmdata;
2731 };
2732
2733 sub load_vmfw_conf {
2734     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2735
2736     my $vmfw_conf = {};
2737
2738     $dir = $pvefw_conf_dir if !defined($dir);
2739
2740     my $filename = "$dir/$vmid.fw";
2741     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2742         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2743         $vmfw_conf->{vmid} = $vmid;
2744     }
2745
2746     return $vmfw_conf;
2747 }
2748
2749 my $format_rules = sub {
2750     my ($rules, $allow_iface) = @_;
2751
2752     my $raw = '';
2753
2754     foreach my $rule (@$rules) {
2755         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2756             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2757             $raw .= uc($rule->{type});
2758             if ($rule->{macro}) {
2759                 $raw .= " $rule->{macro}($rule->{action})";
2760             } else {
2761                 $raw .= " " . $rule->{action};
2762             }
2763             if ($allow_iface && $rule->{iface}) {
2764                 $raw .= " -i $rule->{iface}";
2765             }
2766
2767             if ($rule->{type} ne  'group')  {
2768                 $raw .= " -source $rule->{source}" if $rule->{source};
2769                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2770                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2771                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2772                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2773             }
2774
2775             $raw .= " # " . encode('utf8', $rule->{comment})
2776                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2777             $raw .= "\n";
2778         } else {
2779             die "unknown rule type '$rule->{type}'";
2780         }
2781     }
2782
2783     return $raw;
2784 };
2785
2786 my $format_options = sub {
2787     my ($options) = @_;
2788
2789     my $raw = '';
2790
2791     $raw .= "[OPTIONS]\n\n";
2792     foreach my $opt (keys %$options) {
2793         $raw .= "$opt: $options->{$opt}\n";
2794     }
2795     $raw .= "\n";
2796
2797     return $raw;
2798 };
2799
2800 my $format_aliases = sub {
2801     my ($aliases) = @_;
2802
2803     my $raw = '';
2804
2805     $raw .= "[ALIASES]\n\n";
2806     foreach my $k (keys %$aliases) {
2807         my $e = $aliases->{$k};
2808         $raw .= "$e->{name} $e->{cidr}";
2809         $raw .= " # " . encode('utf8', $e->{comment})
2810             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2811         $raw .= "\n";
2812     }
2813     $raw .= "\n";
2814
2815     return $raw;
2816 };
2817
2818 my $format_ipsets = sub {
2819     my ($fw_conf) = @_;
2820
2821     my $raw = '';
2822
2823     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2824         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2825             my $utf8comment = encode('utf8', $comment);
2826             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2827         } else {
2828             $raw .= "[IPSET $ipset]\n\n";
2829         }
2830         my $options = $fw_conf->{ipset}->{$ipset};
2831
2832         my $nethash = {};
2833         foreach my $entry (@$options) {
2834             $nethash->{$entry->{cidr}} = $entry;
2835         }
2836
2837         foreach my $cidr (sort keys %$nethash) {
2838             my $entry = $nethash->{$cidr};
2839             my $line = $entry->{nomatch} ? '!' : '';
2840             $line .= $entry->{cidr};
2841             $line .= " # " . encode('utf8', $entry->{comment})
2842                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2843             $raw .= "$line\n";
2844         }
2845
2846         $raw .= "\n";
2847     }
2848
2849     return $raw;
2850 };
2851
2852 sub save_vmfw_conf {
2853     my ($vmid, $vmfw_conf) = @_;
2854
2855     my $raw = '';
2856
2857     my $options = $vmfw_conf->{options};
2858     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2859
2860     my $aliases = $vmfw_conf->{aliases};
2861     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2862
2863     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2864
2865     my $rules = $vmfw_conf->{rules} || [];
2866     if ($rules && scalar(@$rules)) {
2867         $raw .= "[RULES]\n\n";
2868         $raw .= &$format_rules($rules, 1);
2869         $raw .= "\n";
2870     }
2871
2872     mkdir $pvefw_conf_dir;
2873
2874     my $filename = "$pvefw_conf_dir/$vmid.fw";
2875     PVE::Tools::file_set_contents($filename, $raw);
2876 }
2877
2878 sub read_vm_firewall_configs {
2879     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2880
2881     my $vmfw_configs = {};
2882
2883     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2884         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2885         next if !$vmfw_conf->{options}; # skip if file does not exists
2886         $vmfw_configs->{$vmid} = $vmfw_conf;
2887     }
2888     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2889         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2890         next if !$vmfw_conf->{options}; # skip if file does not exists
2891         $vmfw_configs->{$vmid} = $vmfw_conf;
2892     }
2893
2894     return $vmfw_configs;
2895 }
2896
2897 sub get_option_log_level {
2898     my ($options, $k) = @_;
2899
2900     my $v = $options->{$k};
2901     $v = $default_log_level if !defined($v);
2902
2903     return undef if $v eq '' || $v eq 'nolog';
2904
2905     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2906
2907     return $v if ($v >= 0) && ($v <= 7);
2908
2909     warn "unknown log level ($k = '$v')\n";
2910
2911     return undef;
2912 }
2913
2914 sub generate_std_chains {
2915     my ($ruleset, $options, $ipversion) = @_;
2916
2917     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2918
2919     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2920
2921     my $chain;
2922
2923     if ($ipversion == 4) {
2924         # same as shorewall smurflog.
2925         $chain = 'PVEFW-smurflog';
2926         $std_chains->{$chain} = [];
2927
2928         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2929         push @{$std_chains->{$chain}}, "-j DROP";
2930     }
2931
2932     # same as shorewall logflags action.
2933     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2934     $chain = 'PVEFW-logflags';
2935     $std_chains->{$chain} = [];
2936
2937     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2938     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2939     push @{$std_chains->{$chain}}, "-j DROP";
2940
2941     foreach my $chain (keys %$std_chains) {
2942         ruleset_create_chain($ruleset, $chain);
2943         foreach my $rule (@{$std_chains->{$chain}}) {
2944             if (ref($rule)) {
2945                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2946             } else {
2947                 ruleset_addrule($ruleset, $chain, $rule);
2948             }
2949         }
2950     }
2951 }
2952
2953 sub generate_ipset_chains {
2954     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2955
2956     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2957
2958         my $options = $fw_conf->{ipset}->{$ipset};
2959
2960         # remove duplicates
2961         my $nethash = {};
2962         foreach my $entry (@$options) {
2963             next if $entry->{errors}; # skip entries with errors
2964             eval {
2965                 my ($cidr, $ver);
2966                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2967                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2968                 } else {
2969                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2970                 }
2971                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2972                 if ($ver == 6) {
2973                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2974                     $cidr = inet_ntop(AF_INET6, $ipv6);
2975                     $cidr =~ s|/128$||;
2976                 } else {
2977                     $cidr =~ s|/32$||;
2978                 }
2979
2980                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2981             };
2982             warn $@ if $@;
2983         }
2984
2985         foreach my $ipversion (4, 6) {
2986             my $data = $nethash->{$ipversion};
2987
2988             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2989
2990             my $hashsize = scalar(@$options);
2991             if ($hashsize <= 64) {
2992                 $hashsize = 64;
2993             } else {
2994                 $hashsize = round_powerof2($hashsize);
2995             }
2996
2997             my $family = $ipversion == "6" ? "inet6" : "inet";
2998
2999             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3000
3001             foreach my $cidr (sort keys %$data) {
3002                 my $entry = $data->{$cidr};
3003
3004                 my $cmd = "add $name $cidr";
3005                 if ($entry->{nomatch}) {
3006                     if ($feature_ipset_nomatch) {
3007                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3008                     } else {
3009                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3010                     }
3011                 } else {
3012                     push @{$ipset_ruleset->{$name}}, $cmd;
3013                 }
3014             }
3015         }
3016     }
3017 }
3018
3019 sub round_powerof2 {
3020     my ($int) = @_;
3021
3022     $int--;
3023     $int |= $int >> $_ foreach (1,2,4,8,16);
3024     return ++$int;
3025 }
3026
3027 sub load_clusterfw_conf {
3028     my ($filename, $verbose) = @_;
3029
3030     $filename = $clusterfw_conf_filename if !defined($filename);
3031
3032     my $cluster_conf = {};
3033     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3034         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3035     }
3036
3037     return $cluster_conf;
3038 }
3039
3040 sub save_clusterfw_conf {
3041     my ($cluster_conf) = @_;
3042
3043     my $raw = '';
3044
3045     my $options = $cluster_conf->{options};
3046     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3047
3048     my $aliases = $cluster_conf->{aliases};
3049     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3050
3051     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3052
3053     my $rules = $cluster_conf->{rules};
3054     if ($rules && scalar(@$rules)) {
3055         $raw .= "[RULES]\n\n";
3056         $raw .= &$format_rules($rules, 1);
3057         $raw .= "\n";
3058     }
3059
3060     if ($cluster_conf->{groups}) {
3061         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3062             my $rules = $cluster_conf->{groups}->{$group};
3063             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3064                 my $utf8comment = encode('utf8', $comment);
3065                 $raw .= "[group $group] # $utf8comment\n\n";
3066             } else {
3067                 $raw .= "[group $group]\n\n";
3068             }
3069
3070             $raw .= &$format_rules($rules, 0);
3071             $raw .= "\n";
3072         }
3073     }
3074
3075     mkdir $pvefw_conf_dir;
3076     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3077 }
3078
3079 sub load_hostfw_conf {
3080     my ($cluster_conf, $filename, $verbose) = @_;
3081
3082     $filename = $hostfw_conf_filename if !defined($filename);
3083
3084     my $hostfw_conf = {};
3085     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3086         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3087     }
3088     return $hostfw_conf;
3089 }
3090
3091 sub save_hostfw_conf {
3092     my ($hostfw_conf) = @_;
3093
3094     my $raw = '';
3095
3096     my $options = $hostfw_conf->{options};
3097     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3098
3099     my $rules = $hostfw_conf->{rules};
3100     if ($rules && scalar(@$rules)) {
3101         $raw .= "[RULES]\n\n";
3102         $raw .= &$format_rules($rules, 1);
3103         $raw .= "\n";
3104     }
3105
3106     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3107 }
3108
3109 sub compile {
3110     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3111
3112     my $vmfw_configs;
3113
3114     if ($vmdata) { # test mode
3115         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3116         my $filename = "$testdir/cluster.fw";
3117         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3118
3119         $filename = "$testdir/host.fw";
3120         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3121
3122         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3123     } else { # normal operation
3124         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3125
3126         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3127
3128         $vmdata = read_local_vm_config();
3129         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3130     }
3131
3132     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3133     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3134
3135     return ($ruleset, $ipset_ruleset, $rulesetv6);
3136 }
3137
3138 sub compile_iptables_filter {
3139     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3140
3141     $cluster_conf->{ipset}->{venet0} = [];
3142     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3143
3144     my $localnet;
3145     if ($cluster_conf->{aliases}->{local_network}) {
3146         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3147     } else {
3148         my $localnet_ver;
3149         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3150
3151         $cluster_conf->{aliases}->{local_network} = {
3152             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3153     }
3154
3155     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3156
3157     return ({}, {}) if !$cluster_conf->{options}->{enable};
3158
3159     my $ruleset = {};
3160
3161     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3162     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3163
3164     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3165
3166     my $hostfw_options = $hostfw_conf->{options} || {};
3167
3168     # fixme: what log level should we use here?
3169     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3170
3171     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3172
3173
3174     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3175     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3176     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3177
3178     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3179     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3180
3181     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3182
3183     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3184     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3185
3186     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3187     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3188
3189     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3190
3191     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3192
3193     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3194
3195     my $ipset_ruleset = {};
3196
3197     if ($hostfw_enable) {
3198         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3199         warn $@ if $@; # just to be sure - should not happen
3200     }
3201
3202     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3203
3204     # generate firewall rules for QEMU VMs
3205     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3206         eval {
3207             my $conf = $vmdata->{qemu}->{$vmid};
3208             my $vmfw_conf = $vmfw_configs->{$vmid};
3209             return if !$vmfw_conf;
3210
3211             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3212
3213             foreach my $netid (keys %$conf) {
3214                 next if $netid !~ m/^net(\d+)$/;
3215                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3216                 next if !$net->{firewall};
3217                 my $iface = "tap${vmid}i$1";
3218
3219                 my $macaddr = $net->{macaddr};
3220                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3221                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3222                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3223                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3224             }
3225         };
3226         warn $@ if $@; # just to be sure - should not happen
3227     }
3228
3229     # generate firewall rules for OpenVZ containers
3230     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3231         eval {
3232             my $conf = $vmdata->{openvz}->{$vmid};
3233
3234             my $vmfw_conf = $vmfw_configs->{$vmid};
3235             return if !$vmfw_conf;
3236
3237             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3238
3239             if ($vmfw_conf->{options}->{enable}) {
3240                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3241                     my $ip = $conf->{ip_address}->{value};
3242                     $ip =~ s/\s+/,/g;
3243
3244                     my @ips = ();
3245
3246                     foreach my $singleip (split(',', $ip)) {
3247                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3248                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3249                         push @ips, $singleip if $singleip_ver == $ipversion;
3250                     }
3251
3252                     if (scalar(@ips)) {
3253                         my $ip_list = join(',', @ips);
3254                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3255                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3256                     }
3257                 }
3258             }
3259
3260             if ($conf->{netif} && $conf->{netif}->{value}) {
3261                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3262                 foreach my $netid (keys %$netif) {
3263                     my $d = $netif->{$netid};
3264                     my $bridge = $d->{bridge};
3265                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3266                     my $macaddr = $d->{mac};
3267                     my $iface = $d->{host_ifname};
3268                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3269                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3270                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3271                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3272                 }
3273             }
3274         };
3275         warn $@ if $@; # just to be sure - should not happen
3276     }
3277
3278     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3279         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3280     }
3281
3282     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3283
3284     return ($ruleset, $ipset_ruleset);
3285 }
3286
3287 sub get_ruleset_status {
3288     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3289
3290     my $statushash = {};
3291
3292     foreach my $chain (sort keys %$ruleset) {
3293         my $sig = &$digest_fn($ruleset->{$chain});
3294
3295         $statushash->{$chain}->{sig} = $sig;
3296
3297         my $oldsig = $active_chains->{$chain};
3298         if (!defined($oldsig)) {
3299             $statushash->{$chain}->{action} = 'create';
3300         } else {
3301             if ($oldsig eq $sig) {
3302                 $statushash->{$chain}->{action} = 'exists';
3303             } else {
3304                 $statushash->{$chain}->{action} = 'update';
3305             }
3306         }
3307         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3308         foreach my $cmd (@{$ruleset->{$chain}}) {
3309             print "\t$cmd\n" if $verbose;
3310         }
3311     }
3312
3313     foreach my $chain (sort keys %$active_chains) {
3314         if (!defined($ruleset->{$chain})) {
3315             my $sig = $active_chains->{$chain};
3316             $statushash->{$chain}->{action} = 'delete';
3317             $statushash->{$chain}->{sig} = $sig;
3318             print "delete $chain ($sig)\n" if $verbose;
3319         }
3320     }
3321
3322     return $statushash;
3323 }
3324
3325 sub print_sig_rule {
3326     my ($chain, $sig) = @_;
3327
3328     # We just use this to store a SHA1 checksum used to detect changes
3329     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3330 }
3331
3332 sub get_ruleset_cmdlist {
3333     my ($ruleset, $verbose, $iptablescmd) = @_;
3334
3335     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3336
3337     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3338     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3339
3340     # create missing chains first
3341     foreach my $chain (sort keys %$ruleset) {
3342         my $stat = $statushash->{$chain};
3343         die "internal error" if !$stat;
3344         next if $stat->{action} ne 'create';
3345
3346         $cmdlist .= ":$chain - [0:0]\n";
3347     }
3348
3349     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3350         my $chain = "PVEFW-$h";
3351         if ($ruleset->{$chain} && !$hooks->{$h}) {
3352             $cmdlist .= "-A $h -j $chain\n";
3353         }
3354     }
3355
3356     foreach my $chain (sort keys %$ruleset) {
3357         my $stat = $statushash->{$chain};
3358         die "internal error" if !$stat;
3359
3360         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3361             $cmdlist .= "-F $chain\n";
3362             foreach my $cmd (@{$ruleset->{$chain}}) {
3363                 $cmdlist .= "$cmd\n";
3364             }
3365             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3366         } elsif ($stat->{action} eq 'delete') {
3367             die "internal error"; # this should not happen
3368         } elsif ($stat->{action} eq 'exists') {
3369             # do nothing
3370         } else {
3371             die "internal error - unknown status '$stat->{action}'";
3372         }
3373     }
3374
3375     foreach my $chain (keys %$statushash) {
3376         next if $statushash->{$chain}->{action} ne 'delete';
3377         $cmdlist .= "-F $chain\n";
3378     }
3379     foreach my $chain (keys %$statushash) {
3380         next if $statushash->{$chain}->{action} ne 'delete';
3381         next if $chain eq 'PVEFW-INPUT';
3382         next if $chain eq 'PVEFW-OUTPUT';
3383         next if $chain eq 'PVEFW-FORWARD';
3384         $cmdlist .= "-X $chain\n";
3385     }
3386
3387     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3388
3389     $cmdlist .= "COMMIT\n";
3390
3391     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3392 }
3393
3394 sub get_ipset_cmdlist {
3395     my ($ruleset, $verbose) = @_;
3396
3397     my $cmdlist = "";
3398
3399     my $delete_cmdlist = "";
3400
3401     my $active_chains = ipset_get_chains();
3402     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3403
3404     # remove stale _swap chains
3405     foreach my $chain (keys %$active_chains) {
3406         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3407             $cmdlist .= "destroy $chain\n";
3408         }
3409     }
3410
3411     foreach my $chain (keys %$ruleset) {
3412         my $stat = $statushash->{$chain};
3413         die "internal error" if !$stat;
3414
3415         if ($stat->{action} eq 'create') {
3416             foreach my $cmd (@{$ruleset->{$chain}}) {
3417                 $cmdlist .= "$cmd\n";
3418             }
3419         }
3420     }
3421
3422     foreach my $chain (keys %$ruleset) {
3423         my $stat = $statushash->{$chain};
3424         die "internal error" if !$stat;
3425
3426         if ($stat->{action} eq 'update') {
3427             my $chain_swap = $chain."_swap";
3428
3429             foreach my $cmd (@{$ruleset->{$chain}}) {
3430                 $cmd =~ s/$chain/$chain_swap/;
3431                 $cmdlist .= "$cmd\n";
3432             }
3433             $cmdlist .= "swap $chain_swap $chain\n";
3434             $cmdlist .= "flush $chain_swap\n";
3435             $cmdlist .= "destroy $chain_swap\n";
3436         }
3437     }
3438
3439      # the remove unused chains
3440     foreach my $chain (keys %$statushash) {
3441         next if $statushash->{$chain}->{action} ne 'delete';
3442
3443         $delete_cmdlist .= "flush $chain\n";
3444         $delete_cmdlist .= "destroy $chain\n";
3445     }
3446
3447     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3448
3449     return ($cmdlist, $delete_cmdlist, $changes);
3450 }
3451
3452 sub apply_ruleset {
3453     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3454
3455     enable_bridge_firewall();
3456
3457     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3458         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3459
3460     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3461     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3462
3463     if ($verbose) {
3464         if ($ipset_changes) {
3465             print "ipset changes:\n";
3466             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3467             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3468         }
3469
3470         if ($changes) {
3471             print "iptables changes:\n";
3472             print $cmdlist;
3473         }
3474
3475         if ($changesv6) {
3476             print "ip6tables changes:\n";
3477             print $cmdlistv6;
3478         }
3479     }
3480
3481     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3482     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3483
3484     ipset_restore_cmdlist($ipset_create_cmdlist);
3485
3486     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3487     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3488
3489     iptables_restore_cmdlist($cmdlist);
3490
3491     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3492     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3493
3494     ip6tables_restore_cmdlist($cmdlistv6);
3495
3496     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3497     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3498
3499     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3500
3501     # test: re-read status and check if everything is up to date
3502     my $active_chains = iptables_get_chains();
3503     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3504
3505     my $errors;
3506     foreach my $chain (sort keys %$ruleset) {
3507         my $stat = $statushash->{$chain};
3508         if ($stat->{action} ne 'exists') {
3509             warn "unable to update chain '$chain'\n";
3510             $errors = 1;
3511         }
3512     }
3513
3514     my $active_chainsv6 = iptables_get_chains("ip6tables");
3515     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3516
3517     foreach my $chain (sort keys %$rulesetv6) {
3518         my $stat = $statushashv6->{$chain};
3519         if ($stat->{action} ne 'exists') {
3520             warn "unable to update chain '$chain'\n";
3521             $errors = 1;
3522         }
3523     }
3524
3525     die "unable to apply firewall changes\n" if $errors;
3526
3527     update_nf_conntrack_max($hostfw_conf);
3528
3529     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3530
3531 }
3532
3533 sub update_nf_conntrack_max {
3534     my ($hostfw_conf) = @_;
3535
3536     my $max = 65536; # reasonable default
3537
3538     my $options = $hostfw_conf->{options} || {};
3539
3540     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3541         $max = $options->{nf_conntrack_max};
3542         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3543     }
3544
3545     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3546     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3547
3548     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3549
3550     if ($current != $max) {
3551         my $hashsize = int($max/4);
3552         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3553         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3554     }
3555 }
3556
3557 sub update_nf_conntrack_tcp_timeout_established {
3558     my ($hostfw_conf) = @_;
3559
3560     my $options = $hostfw_conf->{options} || {};
3561
3562     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3563
3564     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3565 }
3566
3567 sub remove_pvefw_chains {
3568
3569     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3570     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3571     PVE::Firewall::remove_pvefw_chains_ipset();
3572
3573 }
3574
3575 sub remove_pvefw_chains_iptables {
3576     my ($iptablescmd) = @_;
3577
3578     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3579     my $cmdlist = "*filter\n";
3580
3581     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3582         if ($hooks->{$h}) {
3583             $cmdlist .= "-D $h -j PVEFW-$h\n";
3584         }
3585     }
3586
3587     foreach my $chain (keys %$chash) {
3588         $cmdlist .= "-F $chain\n";
3589     }
3590
3591     foreach my $chain (keys %$chash) {
3592         $cmdlist .= "-X $chain\n";
3593     }
3594     $cmdlist .= "COMMIT\n";
3595
3596     if($iptablescmd eq "ip6tables") {
3597         ip6tables_restore_cmdlist($cmdlist);
3598     } else {
3599         iptables_restore_cmdlist($cmdlist);
3600     }
3601 }
3602
3603 sub remove_pvefw_chains_ipset {
3604
3605     my $ipset_chains = ipset_get_chains();
3606
3607     my $cmdlist = "";
3608
3609     foreach my $chain (keys %$ipset_chains) {
3610         $cmdlist .= "flush $chain\n";
3611         $cmdlist .= "destroy $chain\n";
3612     }
3613
3614     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3615 }
3616
3617 sub init {
3618     my $cluster_conf = load_clusterfw_conf();
3619     my $cluster_options = $cluster_conf->{options};
3620     my $enable = $cluster_options->{enable};
3621
3622     return if !$enable;
3623
3624     # load required modules here
3625 }
3626
3627 sub update {
3628     my $code = sub {
3629
3630         my $cluster_conf = load_clusterfw_conf();
3631         my $cluster_options = $cluster_conf->{options};
3632
3633         if (!$cluster_options->{enable}) {
3634             PVE::Firewall::remove_pvefw_chains();
3635             return;
3636         }
3637
3638         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3639
3640         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3641
3642         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3643     };
3644
3645     run_locked($code);
3646 }
3647
3648 1;