src/PVE/Firewall.pm

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