src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 149     ],
 150     'Trcrt' => [
 151         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 152         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 153     ],
 154  };
 155
 156 # imported/converted from: /usr/share/shorewall/macro.*
 157 my $pve_fw_macros = {
 158     'Amanda' => [
 159         "Amanda Backup",
 160         { action => 'PARAM', proto => 'udp', dport => '10080' },
 161         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 162     ],
 163     'Auth' => [
 164         "Auth (identd) traffic",
 165         { action => 'PARAM', proto => 'tcp', dport => '113' },
 166     ],
 167     'BGP' => [
 168         "Border Gateway Protocol traffic",
 169         { action => 'PARAM', proto => 'tcp', dport => '179' },
 170     ],
 171     'BitTorrent' => [
 172         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 173         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 174         { action => 'PARAM', proto => 'udp', dport => '6881' },
 175     ],
 176     'BitTorrent32' => [
 177         "BitTorrent traffic for BitTorrent 3.2 and later",
 178         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 179         { action => 'PARAM', proto => 'udp', dport => '6881' },
 180     ],
 181     'CVS' => [
 182         "Concurrent Versions System pserver traffic",
 183         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 184     ],
 185     'Citrix' => [
 186         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 187         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 188         { action => 'PARAM', proto => 'udp', dport => '1604' },
 189         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 190     ],
 191     'DAAP' => [
 192         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 193         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 194         { action => 'PARAM', proto => 'udp', dport => '3689' },
 195     ],
 196     'DCC' => [
 197         "Distributed Checksum Clearinghouse spam filtering mechanism",
 198         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 199     ],
 200     'DHCPfwd' => [
 201         "Forwarded DHCP traffic",
 202         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 203     ],
 204     'DNS' => [
 205         "Domain Name System traffic (upd and tcp)",
 206         { action => 'PARAM', proto => 'udp', dport => '53' },
 207         { action => 'PARAM', proto => 'tcp', dport => '53' },
 208     ],
 209     'Distcc' => [
 210         "Distributed Compiler service",
 211         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 212     ],
 213     'FTP' => [
 214         "File Transfer Protocol",
 215         { action => 'PARAM', proto => 'tcp', dport => '21' },
 216     ],
 217     'Finger' => [
 218         "Finger protocol (RFC 742)",
 219         { action => 'PARAM', proto => 'tcp', dport => '79' },
 220     ],
 221     'GNUnet' => [
 222         "GNUnet secure peer-to-peer networking traffic",
 223         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 224         { action => 'PARAM', proto => 'udp', dport => '2086' },
 225         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 226         { action => 'PARAM', proto => 'udp', dport => '1080' },
 227     ],
 228     'GRE' => [
 229         "Generic Routing Encapsulation tunneling protocol",
 230         { action => 'PARAM', proto => '47' },
 231     ],
 232     'Git' => [
 233         "Git distributed revision control traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 235     ],
 236     'HKP' => [
 237         "OpenPGP HTTP keyserver protocol traffic",
 238         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 239     ],
 240     'HTTP' => [
 241         "Hypertext Transfer Protocol (WWW)",
 242         { action => 'PARAM', proto => 'tcp', dport => '80' },
 243     ],
 244     'HTTPS' => [
 245         "Hypertext Transfer Protocol (WWW) over SSL",
 246         { action => 'PARAM', proto => 'tcp', dport => '443' },
 247     ],
 248     'ICPV2' => [
 249         "Internet Cache Protocol V2 (Squid) traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '3130' },
 251     ],
 252     'ICQ' => [
 253         "AOL Instant Messenger traffic",
 254         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 255     ],
 256     'IMAP' => [
 257         "Internet Message Access Protocol",
 258         { action => 'PARAM', proto => 'tcp', dport => '143' },
 259     ],
 260     'IMAPS' => [
 261         "Internet Message Access Protocol over SSL",
 262         { action => 'PARAM', proto => 'tcp', dport => '993' },
 263     ],
 264     'IPIP' => [
 265         "IPIP capsulation traffic",
 266         { action => 'PARAM', proto => '94' },
 267     ],
 268     'IPsec' => [
 269         "IPsec traffic",
 270         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 271         { action => 'PARAM', proto => '50' },
 272     ],
 273     'IPsecah' => [
 274         "IPsec authentication (AH) traffic",
 275         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 276         { action => 'PARAM', proto => '51' },
 277     ],
 278     'IPsecnat' => [
 279         "IPsec traffic and Nat-Traversal",
 280         { action => 'PARAM', proto => 'udp', dport => '500' },
 281         { action => 'PARAM', proto => 'udp', dport => '4500' },
 282         { action => 'PARAM', proto => '50' },
 283     ],
 284     'IRC' => [
 285         "Internet Relay Chat traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 287     ],
 288     'Jetdirect' => [
 289         "HP Jetdirect printing",
 290         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 291     ],
 292     'L2TP' => [
 293         "Layer 2 Tunneling Protocol traffic",
 294         { action => 'PARAM', proto => 'udp', dport => '1701' },
 295     ],
 296     'LDAP' => [
 297         "Lightweight Directory Access Protocol traffic",
 298         { action => 'PARAM', proto => 'tcp', dport => '389' },
 299     ],
 300     'LDAPS' => [
 301         "Secure Lightweight Directory Access Protocol traffic",
 302         { action => 'PARAM', proto => 'tcp', dport => '636' },
 303     ],
 304     'MSNP' => [
 305         "Microsoft Notification Protocol",
 306         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 307     ],
 308     'MSSQL' => [
 309         "Microsoft SQL Server",
 310         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 311     ],
 312     'Mail' => [
 313         "Mail traffic (SMTP, SMTPS, Submission)",
 314         { action => 'PARAM', proto => 'tcp', dport => '25' },
 315         { action => 'PARAM', proto => 'tcp', dport => '465' },
 316         { action => 'PARAM', proto => 'tcp', dport => '587' },
 317     ],
 318     'Munin' => [
 319         "Munin networked resource monitoring traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 321     ],
 322     'MySQL' => [
 323         "MySQL server",
 324         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 325     ],
 326     'NNTP' => [
 327         "NNTP traffic (Usenet).",
 328         { action => 'PARAM', proto => 'tcp', dport => '119' },
 329     ],
 330     'NNTPS' => [
 331         "Encrypted NNTP traffic (Usenet)",
 332         { action => 'PARAM', proto => 'tcp', dport => '563' },
 333     ],
 334     'NTP' => [
 335         "Network Time Protocol (ntpd)",
 336         { action => 'PARAM', proto => 'udp', dport => '123' },
 337     ],
 338     'OSPF' => [
 339         "OSPF multicast traffic",
 340         { action => 'PARAM', proto => '89' },
 341     ],
 342     'OpenVPN' => [
 343         "OpenVPN traffic",
 344         { action => 'PARAM', proto => 'udp', dport => '1194' },
 345     ],
 346     'PCA' => [
 347         "Symantec PCAnywere (tm)",
 348         { action => 'PARAM', proto => 'udp', dport => '5632' },
 349         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 350     ],
 351     'POP3' => [
 352         "POP3 traffic",
 353         { action => 'PARAM', proto => 'tcp', dport => '110' },
 354     ],
 355     'POP3S' => [
 356         "Encrypted POP3 traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '995' },
 358     ],
 359     'PPtP' => [
 360         "Point-to-Point Tunneling Protocol",
 361         { action => 'PARAM', proto => '47' },
 362         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 363     ],
 364     'Ping' => [
 365         "ICMP echo request",
 366         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 367     ],
 368     'PostgreSQL' => [
 369         "PostgreSQL server",
 370         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 371     ],
 372     'Printer' => [
 373         "Line Printer protocol printing",
 374         { action => 'PARAM', proto => 'tcp', dport => '515' },
 375     ],
 376     'RDP' => [
 377         "Microsoft Remote Desktop Protocol traffic",
 378         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 379     ],
 380     'RIP' => [
 381         "Routing Information Protocol (bidirectional)",
 382         { action => 'PARAM', proto => 'udp', dport => '520' },
 383     ],
 384     'RNDC' => [
 385         "BIND remote management protocol",
 386         { action => 'PARAM', proto => 'tcp', dport => '953' },
 387     ],
 388     'Razor' => [
 389         "Razor Antispam System",
 390         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 391     ],
 392     'Rdate' => [
 393         "Remote time retrieval (rdate)",
 394         { action => 'PARAM', proto => 'tcp', dport => '37' },
 395     ],
 396     'Rsync' => [
 397         "Rsync server",
 398         { action => 'PARAM', proto => 'tcp', dport => '873' },
 399     ],
 400     'SANE' => [
 401         "SANE network scanning",
 402         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 403     ],
 404     'SMB' => [
 405         "Microsoft SMB traffic",
 406         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 407         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 408         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 409         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 410     ],
 411     'SMBswat' => [
 412         "Samba Web Administration Tool",
 413         { action => 'PARAM', proto => 'tcp', dport => '901' },
 414     ],
 415     'SMTP' => [
 416         "Simple Mail Transfer Protocol",
 417         { action => 'PARAM', proto => 'tcp', dport => '25' },
 418     ],
 419     'SMTPS' => [
 420         "Encrypted Simple Mail Transfer Protocol",
 421         { action => 'PARAM', proto => 'tcp', dport => '465' },
 422     ],
 423     'SNMP' => [
 424         "Simple Network Management Protocol",
 425         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 426         { action => 'PARAM', proto => 'tcp', dport => '161' },
 427     ],
 428     'SPAMD' => [
 429         "Spam Assassin SPAMD traffic",
 430         { action => 'PARAM', proto => 'tcp', dport => '783' },
 431     ],
 432     'SSH' => [
 433         "Secure shell traffic",
 434         { action => 'PARAM', proto => 'tcp', dport => '22' },
 435     ],
 436     'SVN' => [
 437         "Subversion server (svnserve)",
 438         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 439     ],
 440     'SixXS' => [
 441         "SixXS IPv6 Deployment and Tunnel Broker",
 442         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 443         { action => 'PARAM', proto => 'udp', dport => '3740' },
 444         { action => 'PARAM', proto => '41' },
 445         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 446     ],
 447     'Squid' => [
 448         "Squid web proxy traffic",
 449         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 450     ],
 451     'Submission' => [
 452         "Mail message submission traffic",
 453         { action => 'PARAM', proto => 'tcp', dport => '587' },
 454     ],
 455     'Syslog' => [
 456         "Syslog protocol (RFC 5424) traffic",
 457         { action => 'PARAM', proto => 'udp', dport => '514' },
 458         { action => 'PARAM', proto => 'tcp', dport => '514' },
 459     ],
 460     'TFTP' => [
 461         "Trivial File Transfer Protocol traffic",
 462         { action => 'PARAM', proto => 'udp', dport => '69' },
 463     ],
 464     'Telnet' => [
 465         "Telnet traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '23' },
 467     ],
 468     'Telnets' => [
 469         "Telnet over SSL",
 470         { action => 'PARAM', proto => 'tcp', dport => '992' },
 471     ],
 472     'Time' => [
 473         "RFC 868 Time protocol",
 474         { action => 'PARAM', proto => 'tcp', dport => '37' },
 475     ],
 476     'Trcrt' => [
 477         "Traceroute (for up to 30 hops) traffic",
 478         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 479         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 480     ],
 481     'VNC' => [
 482         "VNC traffic for VNC display's 0 - 99",
 483         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 484     ],
 485     'VNCL' => [
 486         "VNC traffic from Vncservers to Vncviewers in listen mode",
 487         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 488     ],
 489     'Web' => [
 490         "WWW traffic (HTTP and HTTPS)",
 491         { action => 'PARAM', proto => 'tcp', dport => '80' },
 492         { action => 'PARAM', proto => 'tcp', dport => '443' },
 493     ],
 494     'Webcache' => [
 495         "Web Cache/Proxy traffic (port 8080)",
 496         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 497     ],
 498     'Webmin' => [
 499         "Webmin traffic",
 500         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 501     ],
 502     'Whois' => [
 503         "Whois (nicname, RFC 3912) traffic",
 504         { action => 'PARAM', proto => 'tcp', dport => '43' },
 505     ],
 506 };
 507
 508 my $pve_fw_parsed_macros;
 509 my $pve_fw_macro_descr;
 510 my $pve_fw_macro_ipversion = {};
 511 my $pve_fw_preferred_macro_names = {};
 512
 513 my $pve_std_chains = {};
 514 $pve_std_chains->{4} = {
 515     'PVEFW-SET-ACCEPT-MARK' => [
 516         "-j MARK --set-mark 1",
 517     ],
 518     'PVEFW-DropBroadcast' => [
 519         # same as shorewall 'Broadcast'
 520         # simply DROP BROADCAST/MULTICAST/ANYCAST
 521         # we can use this to reduce logging
 522         { action => 'DROP', dsttype => 'BROADCAST' },
 523         { action => 'DROP', dsttype => 'MULTICAST' },
 524         { action => 'DROP', dsttype => 'ANYCAST' },
 525         { action => 'DROP', dest => '224.0.0.0/4' },
 526     ],
 527     'PVEFW-reject' => [
 528         # same as shorewall 'reject'
 529         { action => 'DROP', dsttype => 'BROADCAST' },
 530         { action => 'DROP', source => '224.0.0.0/4' },
 531         { action => 'DROP', proto => 'icmp' },
 532         "-p tcp -j REJECT --reject-with tcp-reset",
 533         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 534         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 535         "-j REJECT --reject-with icmp-host-prohibited",
 536     ],
 537     'PVEFW-Drop' => [
 538         # same as shorewall 'Drop', which is equal to DROP,
 539         # but REJECT/DROP some packages to reduce logging,
 540         # and ACCEPT critical ICMP types
 541         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 542         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 543         { action => 'PVEFW-DropBroadcast' },
 544         # ACCEPT critical ICMP types
 545         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 547         # Drop packets with INVALID state
 548         "-m conntrack --ctstate INVALID -j DROP",
 549         # Drop Microsoft SMB noise
 550         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 551         { action => 'DROP', proto => 'udp', dport => '137:139'},
 552         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 553         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 554         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 555         # Drop new/NotSyn traffic so that it doesn't get logged
 556         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 557         # Drop DNS replies
 558         { action => 'DROP', proto => 'udp', sport => 53 },
 559     ],
 560     'PVEFW-Reject' => [
 561         # same as shorewall 'Reject', which is equal to Reject,
 562         # but REJECT/DROP some packages to reduce logging,
 563         # and ACCEPT critical ICMP types
 564         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 565         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 566         { action => 'PVEFW-DropBroadcast' },
 567         # ACCEPT critical ICMP types
 568         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 569         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 570         # Drop packets with INVALID state
 571         "-m conntrack --ctstate INVALID -j DROP",
 572         # Drop Microsoft SMB noise
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 574         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 575         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 576         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 577         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 578         # Drop new/NotSyn traffic so that it doesn't get logged
 579         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 580         # Drop DNS replies
 581         { action => 'DROP', proto => 'udp', sport => 53 },
 582     ],
 583     'PVEFW-tcpflags' => [
 584         # same as shorewall tcpflags action.
 585         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 586         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 588         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 589         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 590         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 591     ],
 592     'PVEFW-smurfs' => [
 593         # same as shorewall smurfs action
 594         # Filter packets for smurfs (packets with a broadcast address as the source).
 595         "-s 0.0.0.0/32 -j RETURN",
 596         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 597         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 598     ],
 599 };
 600
 601 $pve_std_chains->{6} = {
 602     'PVEFW-SET-ACCEPT-MARK' => [
 603         "-j MARK --set-mark 1",
 604     ],
 605     'PVEFW-DropBroadcast' => [
 606         # same as shorewall 'Broadcast'
 607         # simply DROP BROADCAST/MULTICAST/ANYCAST
 608         # we can use this to reduce logging
 609         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 610         # ipv6 addrtype does not work with kernel 2.6.32
 611         #{ action => 'DROP', dsttype => 'MULTICAST' },
 612         #{ action => 'DROP', dsttype => 'ANYCAST' },
 613         { action => 'DROP', dest => 'ff00::/8' },
 614         #{ action => 'DROP', dest => '224.0.0.0/4' },
 615     ],
 616     'PVEFW-reject' => [
 617         # same as shorewall 'reject'
 618         #{ action => 'DROP', dsttype => 'BROADCAST' },
 619         #{ action => 'DROP', source => '224.0.0.0/4' },
 620         { action => 'DROP', proto => 'icmpv6' },
 621         "-p tcp -j REJECT --reject-with tcp-reset",
 622         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 623         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 624         #"-j REJECT --reject-with icmp-host-prohibited",
 625     ],
 626     'PVEFW-Drop' => [
 627         # same as shorewall 'Drop', which is equal to DROP,
 628         # but REJECT/DROP some packages to reduce logging,
 629         # and ACCEPT critical ICMP types
 630         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 631         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 632         { action => 'PVEFW-DropBroadcast' },
 633         # ACCEPT critical ICMP types
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 635         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 636         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 637
 638         # Drop packets with INVALID state
 639         "-m conntrack --ctstate INVALID -j DROP",
 640         # Drop Microsoft SMB noise
 641         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 642         { action => 'DROP', proto => 'udp', dport => '137:139'},
 643         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 644         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 645         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 646         # Drop new/NotSyn traffic so that it doesn't get logged
 647         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 648         # Drop DNS replies
 649         { action => 'DROP', proto => 'udp', sport => 53 },
 650     ],
 651     'PVEFW-Reject' => [
 652         # same as shorewall 'Reject', which is equal to Reject,
 653         # but REJECT/DROP some packages to reduce logging,
 654         # and ACCEPT critical ICMP types
 655         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 656         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 657         { action => 'PVEFW-DropBroadcast' },
 658         # ACCEPT critical ICMP types
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 660         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 661         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 662
 663         # Drop packets with INVALID state
 664         "-m conntrack --ctstate INVALID -j DROP",
 665         # Drop Microsoft SMB noise
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 667         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 668         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 669         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 670         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 671         # Drop new/NotSyn traffic so that it doesn't get logged
 672         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 673         # Drop DNS replies
 674         { action => 'DROP', proto => 'udp', sport => 53 },
 675     ],
 676     'PVEFW-tcpflags' => [
 677         # same as shorewall tcpflags action.
 678         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 679         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 681         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 682         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 683         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 684     ],
 685 };
 686
 687 # iptables -p icmp -h
 688 my $icmp_type_names = {
 689     any => 1,
 690     'echo-reply' => 1,
 691     'destination-unreachable' => 1,
 692     'network-unreachable' => 1,
 693     'host-unreachable' => 1,
 694     'protocol-unreachable' => 1,
 695     'port-unreachable' => 1,
 696     'fragmentation-needed' => 1,
 697     'source-route-failed' => 1,
 698     'network-unknown' => 1,
 699     'host-unknown' => 1,
 700     'network-prohibited' => 1,
 701     'host-prohibited' => 1,
 702     'TOS-network-unreachable' => 1,
 703     'TOS-host-unreachable' => 1,
 704     'communication-prohibited' => 1,
 705     'host-precedence-violation' => 1,
 706     'precedence-cutoff' => 1,
 707     'source-quench' => 1,
 708     'redirect' => 1,
 709     'network-redirect' => 1,
 710     'host-redirect' => 1,
 711     'TOS-network-redirect' => 1,
 712     'TOS-host-redirect' => 1,
 713     'echo-request' => 1,
 714     'router-advertisement' => 1,
 715     'router-solicitation' => 1,
 716     'time-exceeded' => 1,
 717     'ttl-zero-during-transit' => 1,
 718     'ttl-zero-during-reassembly' => 1,
 719     'parameter-problem' => 1,
 720     'ip-header-bad' => 1,
 721     'required-option-missing' => 1,
 722     'timestamp-request' => 1,
 723     'timestamp-reply' => 1,
 724     'address-mask-request' => 1,
 725     'address-mask-reply' => 1,
 726 };
 727
 728 # ip6tables -p icmpv6 -h
 729
 730 my $icmpv6_type_names = {
 731     'any' => 1,
 732     'destination-unreachable' => 1,
 733     'no-route' => 1,
 734     'communication-prohibited' => 1,
 735     'address-unreachable' => 1,
 736     'port-unreachable' => 1,
 737     'packet-too-big' => 1,
 738     'time-exceeded' => 1,
 739     'ttl-zero-during-transit' => 1,
 740     'ttl-zero-during-reassembly' => 1,
 741     'parameter-problem' => 1,
 742     'bad-header' => 1,
 743     'unknown-header-type' => 1,
 744     'unknown-option' => 1,
 745     'echo-request' => 1,
 746     'echo-reply' => 1,
 747     'router-solicitation' => 1,
 748     'router-advertisement' => 1,
 749     'neighbor-solicitation' => 1,
 750     'neighbour-solicitation' => 1,
 751     'neighbor-advertisement' => 1,
 752     'neighbour-advertisement' => 1,
 753     'redirect' => 1,
 754 };
 755
 756 sub init_firewall_macros {
 757
 758     $pve_fw_parsed_macros = {};
 759
 760     my $parse = sub {
 761         my ($k, $macro) = @_;
 762         my $lc_name = lc($k);
 763         $pve_fw_macro_ipversion->{$k} = 0;
 764         while (!ref($macro->[0])) {
 765             my $desc = shift @$macro;
 766             if ($desc eq 'ipv4only') {
 767                 $pve_fw_macro_ipversion->{$k} = 4;
 768             } elsif ($desc eq 'ipv6only') {
 769                 $pve_fw_macro_ipversion->{$k} = 6;
 770             } else {
 771                 $pve_fw_macro_descr->{$k} = $desc;
 772             }
 773         }
 774         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 775         $pve_fw_parsed_macros->{$k} = $macro;
 776     };
 777
 778     foreach my $k (keys %$pve_fw_macros) {
 779         &$parse($k, $pve_fw_macros->{$k});
 780     }
 781
 782     foreach my $k (keys %$pve_ipv6fw_macros) {
 783         next if $pve_fw_parsed_macros->{$k};
 784         &$parse($k, $pve_ipv6fw_macros->{$k});
 785         $pve_fw_macro_ipversion->{$k} = 6;
 786     }
 787 }
 788
 789 init_firewall_macros();
 790
 791 sub get_macros {
 792     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 793 }
 794
 795 my $etc_services;
 796
 797 sub get_etc_services {
 798
 799     return $etc_services if $etc_services;
 800
 801     my $filename = "/etc/services";
 802
 803     my $fh = IO::File->new($filename, O_RDONLY);
 804     if (!$fh) {
 805         warn "unable to read '$filename' - $!\n";
 806         return {};
 807     }
 808
 809     my $services = {};
 810
 811     while (my $line = <$fh>) {
 812         chomp ($line);
 813         next if $line =~m/^#/;
 814         next if ($line =~m/^\s*$/);
 815
 816         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 817             $services->{byid}->{$2}->{name} = $1;
 818             $services->{byid}->{$2}->{port} = $2;
 819             $services->{byid}->{$2}->{$3} = 1;
 820             $services->{byname}->{$1} = $services->{byid}->{$2};
 821         }
 822     }
 823
 824     close($fh);
 825
 826     $etc_services = $services;
 827
 828
 829     return $etc_services;
 830 }
 831
 832 my $etc_protocols;
 833
 834 sub get_etc_protocols {
 835     return $etc_protocols if $etc_protocols;
 836
 837     my $filename = "/etc/protocols";
 838
 839     my $fh = IO::File->new($filename, O_RDONLY);
 840     if (!$fh) {
 841         warn "unable to read '$filename' - $!\n";
 842         return {};
 843     }
 844
 845     my $protocols = {};
 846
 847     while (my $line = <$fh>) {
 848         chomp ($line);
 849         next if $line =~m/^#/;
 850         next if ($line =~m/^\s*$/);
 851
 852         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 853             $protocols->{byid}->{$2}->{name} = $1;
 854             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 855         }
 856     }
 857
 858     close($fh);
 859
 860     # add special case for ICMP v6
 861     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 862     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 863
 864     $etc_protocols = $protocols;
 865
 866     return $etc_protocols;
 867 }
 868
 869 my $ipv4_mask_hash_localnet = {
 870     '255.255.0.0' => 16,
 871     '255.255.128.0' => 17,
 872     '255.255.192.0' => 18,
 873     '255.255.224.0' => 19,
 874     '255.255.240.0' => 20,
 875     '255.255.248.0' => 21,
 876     '255.255.252.0' => 22,
 877     '255.255.254.0' => 23,
 878     '255.255.255.0' => 24,
 879     '255.255.255.128' => 25,
 880     '255.255.255.192' => 26,
 881     '255.255.255.224' => 27,
 882     '255.255.255.240' => 28,
 883     '255.255.255.248' => 29,
 884     '255.255.255.252' => 30,
 885 };
 886
 887 my $__local_network;
 888
 889 sub local_network {
 890     my ($new_value) = @_;
 891
 892     $__local_network = $new_value if defined($new_value);
 893
 894     return $__local_network if defined($__local_network);
 895
 896     eval {
 897         my $nodename = PVE::INotify::nodename();
 898
 899         my $ip = PVE::Cluster::remote_node_ip($nodename);
 900
 901         my $testip = Net::IP->new($ip);
 902
 903         my $routes = PVE::ProcFSTools::read_proc_net_route();
 904         foreach my $entry (@$routes) {
 905             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 906             next if !defined($mask);
 907             return if $mask eq '0.0.0.0';
 908             my $cidr = "$entry->{dest}/$mask";
 909             my $testnet = Net::IP->new($cidr);
 910             if ($testnet->overlaps($testip)) {
 911                 $__local_network = $cidr;
 912                 return;
 913             }
 914         }
 915     };
 916     warn $@ if $@;
 917
 918     return $__local_network;
 919 }
 920
 921 # ipset names are limited to 31 characters,
 922 # and we use '-v4' or '-v6' to indicate IP versions,
 923 # and we use '_swap' suffix for atomic update,
 924 # for example PVEFW-${VMID}-${ipset_name}_swap
 925
 926 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 927
 928 sub compute_ipset_chain_name {
 929     my ($vmid, $ipset_name, $ipversion) = @_;
 930
 931     $vmid = 0 if !defined($vmid);
 932
 933     my $id = "$vmid-${ipset_name}-v$ipversion";
 934
 935     if (length($id) > $max_iptables_ipset_name_length) {
 936         $id = PVE::Tools::fnv31a_hex($id);
 937     }
 938
 939     return "PVEFW-$id";
 940 }
 941
 942 sub compute_ipfilter_ipset_name {
 943     my ($iface) = @_;
 944
 945     return "ipfilter-$iface";
 946 }
 947
 948 sub parse_address_list {
 949     my ($str) = @_;
 950
 951     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 952         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 953         return;
 954     }
 955
 956     if ($str =~ m/^${ip_alias_pattern}$/) {
 957         die "alias name too long\n" if length($str) > $max_alias_name_length;
 958         return;
 959     }
 960
 961     my $count = 0;
 962     my $iprange = 0;
 963     my $ipversion;
 964
 965     foreach my $elem (split(/,/, $str)) {
 966         $count++;
 967         my $ip = Net::IP->new($elem);
 968         if (!$ip) {
 969             my $err = Net::IP::Error();
 970             die "invalid IP address: $err\n";
 971         }
 972         $iprange = 1 if $elem =~ m/-/;
 973
 974         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 975
 976         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 977             if $ipversion && ($new_ipversion != $ipversion);
 978
 979         $ipversion = $new_ipversion;
 980     }
 981
 982     die "you can't use a range in a list\n" if $iprange && $count > 1;
 983
 984     return $ipversion;
 985 }
 986
 987 sub parse_port_name_number_or_range {
 988     my ($str, $dport) = @_;
 989
 990     my $services = PVE::Firewall::get_etc_services();
 991     my $count = 0;
 992     my $icmp_port = 0;
 993
 994     foreach my $item (split(/,/, $str)) {
 995         $count++;
 996         if ($item =~ m/^(\d+):(\d+)$/) {
 997             my ($port1, $port2) = ($1, $2);
 998             die "invalid port '$port1'\n" if $port1 > 65535;
 999             die "invalid port '$port2'\n" if $port2 > 65535;
1000         } elsif ($item =~ m/^(\d+)$/) {
1001             my $port = $1;
1002             die "invalid port '$port'\n" if $port > 65535;
1003         } else {
1004             if ($dport && $icmp_type_names->{$item}) {
1005                 $icmp_port = 1;
1006             } elsif ($dport && $icmpv6_type_names->{$item}) {
1007                 $icmp_port = 1;
1008             } else {
1009                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1010             }
1011         }
1012     }
1013
1014     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1015
1016     return $count;
1017 }
1018
1019 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1020 sub pve_fw_verify_sport_spec {
1021    my ($portstr) = @_;
1022
1023    parse_port_name_number_or_range($portstr, 0);
1024
1025    return $portstr;
1026 }
1027
1028 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1029 sub pve_fw_verify_dport_spec {
1030    my ($portstr) = @_;
1031
1032    parse_port_name_number_or_range($portstr, 1);
1033
1034    return $portstr;
1035 }
1036
1037 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1038 sub pve_fw_verify_addr_spec {
1039    my ($list) = @_;
1040
1041    parse_address_list($list);
1042
1043    return $list;
1044 }
1045
1046 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1047 sub pve_fw_verify_protocol_spec {
1048    my ($proto) = @_;
1049
1050    my $protocols = get_etc_protocols();
1051
1052    die "unknown protocol '$proto'\n" if $proto &&
1053        !(defined($protocols->{byname}->{$proto}) ||
1054          defined($protocols->{byid}->{$proto}));
1055
1056    return $proto;
1057 }
1058
1059
1060 # helper function for API
1061
1062 sub copy_opject_with_digest {
1063     my ($object) = @_;
1064
1065     my $sha = Digest::SHA->new('sha1');
1066
1067     my $res = {};
1068     foreach my $k (sort keys %$object) {
1069         my $v = $object->{$k};
1070         next if !defined($v);
1071         $res->{$k} = $v;
1072         $sha->add($k, ':', $v, "\n");
1073     }
1074
1075     my $digest = $sha->hexdigest;
1076
1077     $res->{digest} = $digest;
1078
1079     return wantarray ? ($res, $digest) : $res;
1080 }
1081
1082 sub copy_list_with_digest {
1083     my ($list) = @_;
1084
1085     my $sha = Digest::SHA->new('sha1');
1086
1087     my $res = [];
1088     foreach my $entry (@$list) {
1089         my $data = {};
1090         foreach my $k (sort keys %$entry) {
1091             my $v = $entry->{$k};
1092             next if !defined($v);
1093             $data->{$k} = $v;
1094             # Note: digest ignores refs ($rule->{errors})
1095             # since Digest::SHA expects a series of bytes,
1096             #  we have to encode the value here to prevent errors when
1097             #  using utf8 characters (eg. in comments)
1098             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1099         }
1100         push @$res, $data;
1101     }
1102
1103     my $digest = $sha->hexdigest;
1104
1105     foreach my $entry (@$res) {
1106         $entry->{digest} = $digest;
1107     }
1108
1109     return wantarray ? ($res, $digest) : $res;
1110 }
1111
1112 my $rule_properties = {
1113     pos => {
1114         description => "Update rule at position <pos>.",
1115         type => 'integer',
1116         minimum => 0,
1117         optional => 1,
1118     },
1119     digest => get_standard_option('pve-config-digest'),
1120     type => {
1121         type => 'string',
1122         optional => 1,
1123         enum => ['in', 'out', 'group'],
1124     },
1125     action => {
1126         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1127         type => 'string',
1128         optional => 1,
1129         pattern => $security_group_name_pattern,
1130         maxLength => 20,
1131         minLength => 2,
1132     },
1133     macro => {
1134         type => 'string',
1135         optional => 1,
1136         maxLength => 128,
1137     },
1138     iface => get_standard_option('pve-iface', { optional => 1 }),
1139     source => {
1140         type => 'string', format => 'pve-fw-addr-spec',
1141         optional => 1,
1142     },
1143     dest => {
1144         type => 'string', format => 'pve-fw-addr-spec',
1145         optional => 1,
1146     },
1147     proto => {
1148         type => 'string', format => 'pve-fw-protocol-spec',
1149         optional => 1,
1150     },
1151     enable => {
1152         type => 'boolean',
1153         optional => 1,
1154     },
1155     sport => {
1156         type => 'string', format => 'pve-fw-sport-spec',
1157         optional => 1,
1158     },
1159     dport => {
1160         type => 'string', format => 'pve-fw-dport-spec',
1161         optional => 1,
1162     },
1163     comment => {
1164         type => 'string',
1165         optional => 1,
1166     },
1167 };
1168
1169 sub add_rule_properties {
1170     my ($properties) = @_;
1171
1172     foreach my $k (keys %$rule_properties) {
1173         my $h = $rule_properties->{$k};
1174         # copy data, so that we can modify later without side effects
1175         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1176     }
1177
1178     return $properties;
1179 }
1180
1181 sub delete_rule_properties {
1182     my ($rule, $delete_str) = @_;
1183
1184     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1185         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1186             if !defined($rule_properties->{$opt});
1187         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1188             if $opt eq 'type' || $opt eq 'action';
1189         delete $rule->{$opt};
1190     }
1191
1192     return $rule;
1193 }
1194
1195 my $apply_macro = sub {
1196     my ($macro_name, $param, $verify, $ipversion) = @_;
1197
1198     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1199     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1200
1201     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1202         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1203     }
1204
1205     # skip macros which are specific to another ipversion
1206     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1207         return if $ipversion != $required;
1208     }
1209
1210     my $rules = [];
1211
1212     foreach my $templ (@$macro_rules) {
1213         my $rule = {};
1214         my $param_used = {};
1215         foreach my $k (keys %$templ) {
1216             my $v = $templ->{$k};
1217             if ($v eq 'PARAM') {
1218                 $v = $param->{$k};
1219                 $param_used->{$k} = 1;
1220             } elsif ($v eq 'DEST') {
1221                 $v = $param->{dest};
1222                 $param_used->{dest} = 1;
1223             } elsif ($v eq 'SOURCE') {
1224                 $v = $param->{source};
1225                 $param_used->{source} = 1;
1226             }
1227
1228             if (!defined($v)) {
1229                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1230                 raise_param_exc({ macro => $msg }) if $verify;
1231                 die "$msg\n";
1232             }
1233             $rule->{$k} = $v;
1234         }
1235         foreach my $k (keys %$param) {
1236             next if $k eq 'macro';
1237             next if !defined($param->{$k});
1238             next if $param_used->{$k};
1239             if (defined($rule->{$k})) {
1240                 if ($rule->{$k} ne $param->{$k}) {
1241                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1242                     raise_param_exc({ $k => $msg }) if $verify;
1243                     die "$msg\n";
1244                 }
1245             } else {
1246                 $rule->{$k} = $param->{$k};
1247             }
1248         }
1249         push @$rules, $rule;
1250     }
1251
1252     return $rules;
1253 };
1254
1255 my $rule_env_iface_lookup = {
1256     'ct' => 1,
1257     'vm' => 1,
1258     'group' => 0,
1259     'cluster' => 1,
1260     'host' => 1,
1261 };
1262
1263 sub verify_rule {
1264     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1265
1266     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1267
1268     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1269     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1270
1271     my $errors = $rule->{errors} || {};
1272
1273     my $error_count = 0;
1274
1275     my $add_error = sub {
1276         my ($param, $msg)  = @_;
1277         chomp $msg;
1278         raise_param_exc({ $param => $msg }) if !$noerr;
1279         $error_count++;
1280         $errors->{$param} = $msg if !$errors->{$param};
1281     };
1282
1283     my $ipversion;
1284     my $set_ip_version = sub {
1285         my $vers = shift;
1286         if ($vers) {
1287             die "detected mixed ipv4/ipv6 adresses in rule\n"
1288                 if $ipversion && ($vers != $ipversion);
1289             $ipversion = $vers;
1290         }
1291     };
1292
1293     my $check_ipset_or_alias_property = sub {
1294         my ($name, $expected_ipversion) = @_;
1295
1296         if (my $value = $rule->{$name}) {
1297             if ($value =~ m/^\+/) {
1298                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1299                     &$add_error($name, "no such ipset '$1'")
1300                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1301
1302                 } else {
1303                     &$add_error($name, "invalid ipset name '$value'");
1304                 }
1305             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1306                 my $alias = lc($value);
1307                 &$add_error($name, "no such alias '$value'")
1308                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1309                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1310                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1311
1312                 &$set_ip_version($e->{ipversion});
1313             }
1314         }
1315     };
1316
1317     my $type = $rule->{type};
1318     my $action = $rule->{action};
1319
1320     &$add_error('type', "missing property") if !$type;
1321     &$add_error('action', "missing property") if !$action;
1322
1323     if ($type) {
1324         if ($type eq  'in' || $type eq 'out') {
1325             &$add_error('action', "unknown action '$action'")
1326                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1327         } elsif ($type eq 'group') {
1328             &$add_error('type', "security groups not allowed")
1329                 if !$allow_groups;
1330             &$add_error('action', "invalid characters in security group name")
1331                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1332         } else {
1333             &$add_error('type', "unknown rule type '$type'");
1334         }
1335     }
1336
1337     if ($rule->{iface}) {
1338         &$add_error('type', "parameter -i not allowed for this rule type")
1339             if !$allow_iface;
1340         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1341         &$add_error('iface', $@) if $@;
1342         if ($rule_env eq 'vm') {
1343             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1344                 if $rule->{iface} !~  m/^net(\d+)$/;
1345         } elsif ($rule_env eq 'ct') {
1346             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1347                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1348         }
1349     }
1350
1351     if ($rule->{macro}) {
1352         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1353             $rule->{macro} = $preferred_name;
1354         } else {
1355             &$add_error('macro', "unknown macro '$rule->{macro}'");
1356         }
1357     }
1358
1359     if ($rule->{proto}) {
1360         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1361         &$add_error('proto', $@) if $@;
1362         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1363         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1364     }
1365
1366     if ($rule->{dport}) {
1367         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1368         &$add_error('dport', $@) if $@;
1369         &$add_error('proto', "missing property - 'dport' requires this property")
1370             if !$rule->{proto};
1371     }
1372
1373     if ($rule->{sport}) {
1374         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1375         &$add_error('sport', $@) if $@;
1376         &$add_error('proto', "missing property - 'sport' requires this property")
1377             if !$rule->{proto};
1378     }
1379
1380     if ($rule->{source}) {
1381         eval {
1382             my $source_ipversion = parse_address_list($rule->{source});
1383             &$set_ip_version($source_ipversion);
1384         };
1385         &$add_error('source', $@) if $@;
1386         &$check_ipset_or_alias_property('source', $ipversion);
1387     }
1388
1389     if ($rule->{dest}) {
1390         eval {
1391             my $dest_ipversion = parse_address_list($rule->{dest});
1392             &$set_ip_version($dest_ipversion);
1393         };
1394         &$add_error('dest', $@) if $@;
1395         &$check_ipset_or_alias_property('dest', $ipversion);
1396     }
1397
1398     $rule->{ipversion} = $ipversion if $ipversion;
1399
1400     if ($rule->{macro} && !$error_count) {
1401         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1402         if (my $err = $@) {
1403             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1404                 my $eh = $err->{errors};
1405                 foreach my $p (keys %$eh) {
1406                     &$add_error($p, $eh->{$p});
1407                 }
1408             } else {
1409                 &$add_error('macro', "$err");
1410             }
1411         }
1412     }
1413
1414     $rule->{errors} = $errors if $error_count;
1415
1416     return $rule;
1417 }
1418
1419 sub copy_rule_data {
1420     my ($rule, $param) = @_;
1421
1422     foreach my $k (keys %$rule_properties) {
1423         if (defined(my $v = $param->{$k})) {
1424             if ($v eq '' || $v eq '-') {
1425                 delete $rule->{$k};
1426             } else {
1427                 $rule->{$k} = $v;
1428             }
1429         }
1430     }
1431
1432     return $rule;
1433 }
1434
1435 sub rules_modify_permissions {
1436     my ($rule_env) = @_;
1437
1438     if ($rule_env eq 'host') {
1439         return {
1440             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1441         };
1442     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1443         return {
1444             check => ['perm', '/', [ 'Sys.Modify' ]],
1445         };
1446     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1447         return {
1448             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1449         }
1450     }
1451
1452     return undef;
1453 }
1454
1455 sub rules_audit_permissions {
1456     my ($rule_env) = @_;
1457
1458     if ($rule_env eq 'host') {
1459         return {
1460             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1461         };
1462     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1463         return {
1464             check => ['perm', '/', [ 'Sys.Audit' ]],
1465         };
1466     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1467         return {
1468             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1469         }
1470     }
1471
1472     return undef;
1473 }
1474
1475 # core functions
1476 my $bridge_firewall_enabled = 0;
1477
1478 sub enable_bridge_firewall {
1479
1480     return if $bridge_firewall_enabled; # only once
1481
1482     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1483     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1484
1485     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1486     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1487
1488     $bridge_firewall_enabled = 1;
1489 }
1490
1491 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1492
1493 sub iptables_restore_cmdlist {
1494     my ($cmdlist) = @_;
1495
1496     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1497 }
1498
1499 sub ip6tables_restore_cmdlist {
1500     my ($cmdlist) = @_;
1501
1502     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1503 }
1504
1505 sub ipset_restore_cmdlist {
1506     my ($cmdlist) = @_;
1507
1508     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1509 }
1510
1511 sub iptables_get_chains {
1512     my ($iptablescmd) = @_;
1513
1514     $iptablescmd = "iptables" if !$iptablescmd;
1515
1516     my $res = {};
1517
1518     # check what chains we want to track
1519     my $is_pvefw_chain = sub {
1520         my $name = shift;
1521
1522         return 1 if $name =~ m/^PVEFW-\S+$/;
1523
1524         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1525
1526         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1527
1528         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1529
1530         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1531         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1532
1533         return undef;
1534     };
1535
1536     my $table = '';
1537
1538     my $hooks = {};
1539
1540     my $parser = sub {
1541         my $line = shift;
1542
1543         return if $line =~ m/^#/;
1544         return if $line =~ m/^\s*$/;
1545
1546         if ($line =~ m/^\*(\S+)$/) {
1547             $table = $1;
1548             return;
1549         }
1550
1551         return if $table ne 'filter';
1552
1553         if ($line =~ m/^:(\S+)\s/) {
1554             my $chain = $1;
1555             return if !&$is_pvefw_chain($chain);
1556             $res->{$chain} = "unknown";
1557         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1558             my ($chain, $sig) = ($1, $2);
1559             return if !&$is_pvefw_chain($chain);
1560             $res->{$chain} = $sig;
1561         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1562             $hooks->{$1} = 1;
1563         } else {
1564             # simply ignore the rest
1565             return;
1566         }
1567     };
1568
1569     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1570
1571     return wantarray ? ($res, $hooks) : $res;
1572 }
1573
1574 sub iptables_chain_digest {
1575     my ($rules) = @_;
1576     my $digest = Digest::SHA->new('sha1');
1577     foreach my $rule (@$rules) { # order is important
1578         $digest->add($rule);
1579     }
1580     return $digest->b64digest;
1581 }
1582
1583 sub ipset_chain_digest {
1584     my ($rules) = @_;
1585
1586     my $digest = Digest::SHA->new('sha1');
1587     foreach my $rule (sort @$rules) { # note: sorted
1588         $digest->add($rule);
1589     }
1590     return $digest->b64digest;
1591 }
1592
1593 sub ipset_get_chains {
1594
1595     my $res = {};
1596     my $chains = {};
1597
1598     my $parser = sub {
1599         my $line = shift;
1600
1601         return if $line =~ m/^#/;
1602         return if $line =~ m/^\s*$/;
1603         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1604             my $chain = $1;
1605             $line =~ s/\s+$//; # delete trailing white space
1606             push @{$chains->{$chain}}, $line;
1607         } else {
1608             # simply ignore the rest
1609             return;
1610         }
1611     };
1612
1613     run_command("/usr/sbin/ipset save", outfunc => $parser);
1614
1615     # compute digest for each chain
1616     foreach my $chain (keys %$chains) {
1617         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1618     }
1619
1620     return $res;
1621 }
1622
1623 sub ruleset_generate_cmdstr {
1624     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1625
1626     return if defined($rule->{enable}) && !$rule->{enable};
1627     return if $rule->{errors};
1628
1629     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1630
1631     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1632     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1633
1634     my @cmd = ();
1635
1636     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1637     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1638
1639     my $source = $rule->{source};
1640     my $dest = $rule->{dest};
1641
1642     if ($source) {
1643         if ($source =~ m/^\+/) {
1644             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1645                 my $name = $1;
1646                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1647                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1648                     push @cmd, "-m set --match-set ${ipset_chain} src";
1649                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1650                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1651                     push @cmd, "-m set --match-set ${ipset_chain} src";
1652                 } else {
1653                     die "no such ipset '$name'\n";
1654                 }
1655             } else {
1656                 die "invalid security group name '$source'\n";
1657             }
1658         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1659             my $alias = lc($source);
1660             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1661             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1662             die "no such alias '$source'\n" if !$e;
1663             push @cmd, "-s $e->{cidr}";
1664         } elsif ($source =~ m/\-/){
1665             push @cmd, "-m iprange --src-range $source";
1666         } else {
1667             push @cmd, "-s $source";
1668         }
1669     }
1670
1671     if ($dest) {
1672         if ($dest =~ m/^\+/) {
1673             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1674                 my $name = $1;
1675                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1676                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1677                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1678                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1679                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1680                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1681                 } else {
1682                     die "no such ipset '$name'\n";
1683                 }
1684             } else {
1685                 die "invalid security group name '$dest'\n";
1686             }
1687         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1688             my $alias = lc($dest);
1689             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1690             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1691             die "no such alias '$dest'\n" if !$e;
1692             push @cmd, "-d $e->{cidr}";
1693         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1694             push @cmd, "-m iprange --dst-range $dest";
1695         } else {
1696             push @cmd, "-d $dest";
1697         }
1698     }
1699
1700     if ($rule->{proto}) {
1701         push @cmd, "-p $rule->{proto}";
1702
1703         my $multiport = 0;
1704         $multiport++ if $nbdport > 1;
1705         $multiport++ if $nbsport > 1;
1706
1707         push @cmd, "--match multiport" if $multiport;
1708
1709         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1710             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1711
1712         if ($rule->{dport}) {
1713             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1714                 # Note: we use dport to store --icmp-type
1715                 die "unknown icmp-type '$rule->{dport}'\n"
1716                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1717                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1718             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1719                 # Note: we use dport to store --icmpv6-type
1720                 die "unknown icmpv6-type '$rule->{dport}'\n"
1721                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1722                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1723             } else {
1724                 if ($nbdport > 1) {
1725                     if ($multiport == 2) {
1726                         push @cmd,  "--ports $rule->{dport}";
1727                     } else {
1728                         push @cmd, "--dports $rule->{dport}";
1729                     }
1730                 } else {
1731                     push @cmd, "--dport $rule->{dport}";
1732                 }
1733             }
1734         }
1735
1736         if ($rule->{sport}) {
1737             if ($nbsport > 1) {
1738                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1739             } else {
1740                 push @cmd, "--sport $rule->{sport}";
1741             }
1742         }
1743     } elsif ($rule->{dport} || $rule->{sport}) {
1744         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1745         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1746     }
1747
1748     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1749
1750     if (my $action = $rule->{action}) {
1751         $action = $actions->{$action} if defined($actions->{$action});
1752         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1753         push @cmd, $goto ? "-g $action" : "-j $action";
1754     }
1755
1756     return scalar(@cmd) ? join(' ', @cmd) : undef;
1757 }
1758
1759 sub ruleset_generate_rule {
1760     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1761
1762     my $rules;
1763
1764     if ($rule->{macro}) {
1765         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1766     } else {
1767         $rules = [ $rule ];
1768     }
1769
1770     # update all or nothing
1771
1772     my @cmds = ();
1773     foreach my $tmp (@$rules) {
1774         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1775             push @cmds, $cmdstr;
1776         }
1777     }
1778
1779     foreach my $cmdstr (@cmds) {
1780         ruleset_addrule($ruleset, $chain, $cmdstr);
1781     }
1782 }
1783
1784 sub ruleset_generate_rule_insert {
1785     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1786
1787     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1788
1789     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1790         ruleset_insertrule($ruleset, $chain, $cmdstr);
1791     }
1792 }
1793
1794 sub ruleset_create_chain {
1795     my ($ruleset, $chain) = @_;
1796
1797     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1798     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1799
1800     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1801
1802     $ruleset->{$chain} = [];
1803 }
1804
1805 sub ruleset_chain_exist {
1806     my ($ruleset, $chain) = @_;
1807
1808     return $ruleset->{$chain} ? 1 : undef;
1809 }
1810
1811 sub ruleset_addrule {
1812    my ($ruleset, $chain, $rule) = @_;
1813
1814    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1815
1816    push @{$ruleset->{$chain}}, "-A $chain $rule";
1817 }
1818
1819 sub ruleset_insertrule {
1820    my ($ruleset, $chain, $rule) = @_;
1821
1822    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1823
1824    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1825 }
1826
1827 sub get_log_rule_base {
1828     my ($chain, $vmid, $msg, $loglevel) = @_;
1829
1830     die "internal error - no log level" if !defined($loglevel);
1831
1832     $vmid = 0 if !defined($vmid);
1833
1834     # Note: we use special format for prefix to pass further
1835     # info to log daemon (VMID, LOGVELEL and CHAIN)
1836
1837     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1838 }
1839
1840 sub ruleset_addlog {
1841     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1842
1843     return if !defined($loglevel);
1844
1845     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1846
1847     $logrule = "$rule $logrule" if defined($rule);
1848
1849     ruleset_addrule($ruleset, $chain, $logrule);
1850 }
1851
1852 sub ruleset_add_chain_policy {
1853     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1854
1855     if ($policy eq 'ACCEPT') {
1856
1857         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1858                               { ACCEPT =>  $accept_action});
1859
1860     } elsif ($policy eq 'DROP') {
1861
1862         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1863
1864         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1865
1866         ruleset_addrule($ruleset, $chain, "-j DROP");
1867     } elsif ($policy eq 'REJECT') {
1868         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1869
1870         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1871
1872         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1873     } else {
1874         # should not happen
1875         die "internal error: unknown policy '$policy'";
1876     }
1877 }
1878
1879 sub ruleset_chain_add_ndp {
1880     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
1881     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1882
1883     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
1884     if ($direction ne 'OUT' || $options->{radv}) {
1885         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
1886     }
1887     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
1888     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
1889 }
1890
1891 sub ruleset_chain_add_conn_filters {
1892     my ($ruleset, $chain, $accept) = @_;
1893
1894     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1895     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1896 }
1897
1898 sub ruleset_chain_add_input_filters {
1899     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1900
1901     if ($cluster_conf->{ipset}->{blacklist}){
1902         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1903             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1904             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1905             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1906         }
1907         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1908         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1909     }
1910
1911     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1912         if ($ipversion == 4) {
1913             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1914         }
1915     }
1916
1917     if ($options->{tcpflags}) {
1918         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1919     }
1920 }
1921
1922 sub ruleset_create_vm_chain {
1923     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1924
1925     ruleset_create_chain($ruleset, $chain);
1926     my $accept = generate_nfqueue($options);
1927
1928     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1929         if ($direction eq 'OUT') {
1930             ruleset_generate_rule($ruleset, $chain, $ipversion,
1931                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1932                                     proto => 'udp', sport => 68, dport => 67 });
1933         } else {
1934             ruleset_generate_rule($ruleset, $chain, $ipversion,
1935                                   { action => 'ACCEPT',
1936                                     proto => 'udp', sport => 67, dport => 68 });
1937         }
1938     }
1939
1940     if ($direction eq 'OUT') {
1941         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1942             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1943         }
1944         if ($ipversion == 6 && !$options->{radv}) {
1945             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
1946         }
1947         if ($ipfilter_ipset) {
1948             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1949         }
1950         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1951     }
1952
1953     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
1954     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
1955 }
1956
1957 sub ruleset_add_group_rule {
1958     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1959
1960     my $group = $rule->{action};
1961     my $group_chain = "GROUP-$group-$direction";
1962     if(!ruleset_chain_exist($ruleset, $group_chain)){
1963         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1964     }
1965
1966     if ($direction eq 'OUT' && $rule->{iface_out}) {
1967         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1968     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1969         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1970     } else {
1971         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1972     }
1973
1974     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1975 }
1976
1977 sub ruleset_generate_vm_rules {
1978     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1979
1980     my $lc_direction = lc($direction);
1981
1982     my $in_accept = generate_nfqueue($options);
1983
1984     foreach my $rule (@$rules) {
1985         next if $rule->{iface} && $rule->{iface} ne $netid;
1986         next if !$rule->{enable} || $rule->{errors};
1987         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1988
1989         if ($rule->{type} eq 'group') {
1990             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1991                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1992         } else {
1993             next if $rule->{type} ne $lc_direction;
1994             eval {
1995                 if ($direction eq 'OUT') {
1996                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1997                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1998                                           undef, $cluster_conf, $vmfw_conf);
1999                 } else {
2000                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2001                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2002                                           undef, $cluster_conf, $vmfw_conf);
2003                 }
2004             };
2005             warn $@ if $@;
2006         }
2007     }
2008 }
2009
2010 sub generate_nfqueue {
2011     my ($options) = @_;
2012
2013     if ($options->{ips}) {
2014         my $action = "NFQUEUE";
2015         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2016             if (defined($3) && defined($1)) {
2017                 $action .= " --queue-balance $1:$3";
2018             } elsif (defined($1)) {
2019                 $action .= " --queue-num $1";
2020             }
2021         }
2022         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2023         return $action;
2024     } else {
2025         return "ACCEPT";
2026     }
2027 }
2028
2029 sub ruleset_generate_vm_ipsrules {
2030     my ($ruleset, $options, $direction, $iface) = @_;
2031
2032     if ($options->{ips} && $direction eq 'IN') {
2033         my $nfqueue = generate_nfqueue($options);
2034
2035         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2036             ruleset_create_chain($ruleset, "PVEFW-IPS");
2037         }
2038
2039         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2040     }
2041 }
2042
2043 sub generate_venet_rules_direction {
2044     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
2045
2046     my $lc_direction = lc($direction);
2047
2048     my $rules = $vmfw_conf->{rules};
2049
2050     my $options = $vmfw_conf->{options};
2051     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2052
2053     my $chain = "venet0-$vmid-$direction";
2054
2055     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2056
2057     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2058
2059     # implement policy
2060     my $policy;
2061
2062     if ($direction eq 'OUT') {
2063         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2064     } else {
2065         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2066     }
2067
2068     my $accept = generate_nfqueue($options);
2069     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2070     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2071
2072     if ($direction eq 'OUT') {
2073         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2074             action => $chain,
2075             source => $ip,
2076             iface_in => 'venet0'});
2077     } else {
2078         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2079             action => $chain,
2080             dest => $ip,
2081             iface_out => 'venet0'});
2082     }
2083 }
2084
2085 sub generate_tap_rules_direction {
2086     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2087
2088     my $lc_direction = lc($direction);
2089
2090     my $rules = $vmfw_conf->{rules};
2091
2092     my $options = $vmfw_conf->{options};
2093     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2094
2095     my $tapchain = "$iface-$direction";
2096
2097     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2098     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2099         if $vmfw_conf->{ipset}->{$ipfilter_name};
2100
2101     # create chain with mac and ip filter
2102     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2103
2104     if ($options->{enable}) {
2105         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2106
2107         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2108
2109         # implement policy
2110         my $policy;
2111
2112         if ($direction eq 'OUT') {
2113             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2114         } else {
2115         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2116         }
2117
2118         my $accept = generate_nfqueue($options);
2119         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2120         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2121     } else {
2122         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2123         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2124     }
2125
2126     # plug the tap chain to bridge chain
2127     if ($direction eq 'IN') {
2128         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2129                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2130     } else {
2131         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2132                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2133     }
2134 }
2135
2136 sub enable_host_firewall {
2137     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2138
2139     my $options = $hostfw_conf->{options};
2140     my $cluster_options = $cluster_conf->{options};
2141     my $rules = $hostfw_conf->{rules};
2142     my $cluster_rules = $cluster_conf->{rules};
2143
2144     # host inbound firewall
2145     my $chain = "PVEFW-HOST-IN";
2146     ruleset_create_chain($ruleset, $chain);
2147
2148     my $loglevel = get_option_log_level($options, "log_level_in");
2149
2150     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2151
2152     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2153     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2154     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2155
2156     # we use RETURN because we need to check also tap rules
2157     my $accept_action = 'RETURN';
2158
2159     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2160
2161     # add host rules first, so that cluster wide rules can be overwritten
2162     foreach my $rule (@$rules, @$cluster_rules) {
2163         next if !$rule->{enable} || $rule->{errors};
2164         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2165
2166         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2167
2168         eval {
2169             if ($rule->{type} eq 'group') {
2170                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2171             } elsif ($rule->{type} eq 'in') {
2172                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2173                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2174                                       undef, $cluster_conf, $hostfw_conf);
2175             }
2176         };
2177         warn $@ if $@;
2178         delete $rule->{iface_in};
2179     }
2180
2181     # allow standard traffic for management ipset (includes cluster network)
2182     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2183     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2184     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2185     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2186     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2187     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2188
2189     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2190     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2191
2192     # corosync
2193     if ($localnet && ($ipversion == $localnet_ver)) {
2194         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2195         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2196         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2197     }
2198
2199     # implement input policy
2200     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2201     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2202
2203     # host outbound firewall
2204     $chain = "PVEFW-HOST-OUT";
2205     ruleset_create_chain($ruleset, $chain);
2206
2207     $loglevel = get_option_log_level($options, "log_level_out");
2208
2209     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2210
2211     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2212
2213     # we use RETURN because we may want to check other thigs later
2214     $accept_action = 'RETURN';
2215     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2216
2217     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2218
2219     # add host rules first, so that cluster wide rules can be overwritten
2220     foreach my $rule (@$rules, @$cluster_rules) {
2221         next if !$rule->{enable} || $rule->{errors};
2222         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2223
2224         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2225         eval {
2226             if ($rule->{type} eq 'group') {
2227                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2228             } elsif ($rule->{type} eq 'out') {
2229                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2230                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2231                                       undef, $cluster_conf, $hostfw_conf);
2232             }
2233         };
2234         warn $@ if $@;
2235         delete $rule->{iface_out};
2236     }
2237
2238     # allow standard traffic on cluster network
2239     if ($localnet && ($ipversion == $localnet_ver)) {
2240         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2241         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2242         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2243         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2244
2245         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2246         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2247         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2248     }
2249
2250     # implement output policy
2251     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2252     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2253
2254     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2255     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2256 }
2257
2258 sub generate_group_rules {
2259     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2260
2261     my $rules = $cluster_conf->{groups}->{$group};
2262
2263     if (!$rules) {
2264         warn "no such security group '$group'\n";
2265         $rules = []; # create empty chain
2266     }
2267
2268     my $chain = "GROUP-${group}-IN";
2269
2270     ruleset_create_chain($ruleset, $chain);
2271     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2272
2273     foreach my $rule (@$rules) {
2274         next if $rule->{type} ne 'in';
2275         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2276         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2277                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2278                               undef, $cluster_conf);
2279     }
2280
2281     $chain = "GROUP-${group}-OUT";
2282
2283     ruleset_create_chain($ruleset, $chain);
2284     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2285
2286     foreach my $rule (@$rules) {
2287         next if $rule->{type} ne 'out';
2288         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2289         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2290         # check also other tap rules later
2291         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2292                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2293                               undef, $cluster_conf);
2294     }
2295 }
2296
2297 my $MAX_NETS = 32;
2298 my $valid_netdev_names = {};
2299 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2300     $valid_netdev_names->{"net$i"} = 1;
2301 }
2302
2303 sub parse_fw_rule {
2304     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2305
2306     my $orig_line = $line;
2307
2308     my $rule = {};
2309
2310     # we can add single line comments to the end of the rule
2311     if ($line =~ s/#\s*(.*?)\s*$//) {
2312         $rule->{comment} = decode('utf8', $1);
2313     }
2314
2315     # we can disable a rule when prefixed with '|'
2316
2317     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2318
2319     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2320         die "unable to parse rule: $line\n";
2321
2322     $rule->{type} = lc($1);
2323     $rule->{action} = $2;
2324
2325     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2326         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2327             $rule->{macro} = $1;
2328             $rule->{action} = $2;
2329         }
2330     }
2331
2332     while (length($line)) {
2333         if ($line =~ s/^-i (\S+)\s*//) {
2334             $rule->{iface} = $1;
2335             next;
2336         }
2337
2338         last if $rule->{type} eq 'group';
2339
2340         if ($line =~ s/^-p (\S+)\s*//) {
2341             $rule->{proto} = $1;
2342             next;
2343         }
2344
2345         if ($line =~ s/^-dport (\S+)\s*//) {
2346             $rule->{dport} = $1;
2347             next;
2348         }
2349
2350         if ($line =~ s/^-sport (\S+)\s*//) {
2351             $rule->{sport} = $1;
2352             next;
2353         }
2354         if ($line =~ s/^-source (\S+)\s*//) {
2355             $rule->{source} = $1;
2356             next;
2357         }
2358         if ($line =~ s/^-dest (\S+)\s*//) {
2359             $rule->{dest} = $1;
2360             next;
2361         }
2362
2363         last;
2364     }
2365
2366     die "unable to parse rule parameters: $line\n" if length($line);
2367
2368     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2369     if ($verbose && $rule->{errors}) {
2370         warn "$prefix - errors in rule parameters: $orig_line\n";
2371         foreach my $p (keys %{$rule->{errors}}) {
2372             warn "  $p: $rule->{errors}->{$p}\n";
2373         }
2374     }
2375
2376     return $rule;
2377 }
2378
2379 sub parse_vmfw_option {
2380     my ($line) = @_;
2381
2382     my ($opt, $value);
2383
2384     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2385
2386     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ips):\s*(0|1)\s*$/i) {
2387         $opt = lc($1);
2388         $value = int($2);
2389     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2390         $opt = lc($1);
2391         $value = $2 ? lc($3) : '';
2392     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2393         $opt = lc($1);
2394         $value = uc($3);
2395     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2396         $opt = lc($1);
2397         $value = $2;
2398     } else {
2399         die "can't parse option '$line'\n"
2400     }
2401
2402     return ($opt, $value);
2403 }
2404
2405 sub parse_hostfw_option {
2406     my ($line) = @_;
2407
2408     my ($opt, $value);
2409
2410     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2411
2412     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2413         $opt = lc($1);
2414         $value = int($2);
2415     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2416         $opt = lc($1);
2417         $value = $2 ? lc($3) : '';
2418     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2419         $opt = lc($1);
2420         $value = int($2);
2421     } else {
2422         die "can't parse option '$line'\n"
2423     }
2424
2425     return ($opt, $value);
2426 }
2427
2428 sub parse_clusterfw_option {
2429     my ($line) = @_;
2430
2431     my ($opt, $value);
2432
2433     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2434         $opt = lc($1);
2435         $value = int($2);
2436     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2437         $opt = lc($1);
2438         $value = uc($3);
2439     } else {
2440         die "can't parse option '$line'\n"
2441     }
2442
2443     return ($opt, $value);
2444 }
2445
2446 sub resolve_alias {
2447     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2448
2449     my $alias = lc($cidr);
2450     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2451     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2452
2453     die "no such alias '$cidr'\n" if !$e;;
2454
2455     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2456 }
2457
2458 sub parse_ip_or_cidr {
2459     my ($cidr) = @_;
2460
2461     my $ipversion;
2462
2463     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2464         $cidr =~ s|/128$||;
2465         $ipversion = 6;
2466     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2467         $cidr =~ s|/32$||;
2468         $ipversion = 4;
2469     } else {
2470         die "value does not look like a valid IP address or CIDR network\n";
2471     }
2472
2473     return wantarray ? ($cidr, $ipversion) : $cidr;
2474 }
2475
2476 sub parse_alias {
2477     my ($line) = @_;
2478
2479     # we can add single line comments to the end of the line
2480     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2481
2482     if ($line =~ m/^(\S+)\s(\S+)$/) {
2483         my ($name, $cidr) = ($1, $2);
2484         my $ipversion;
2485
2486         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2487
2488         my $data = {
2489             name => $name,
2490             cidr => $cidr,
2491             ipversion => $ipversion,
2492         };
2493         $data->{comment} = $comment  if $comment;
2494         return $data;
2495     }
2496
2497     return undef;
2498 }
2499
2500 sub generic_fw_config_parser {
2501     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2502
2503     my $section;
2504     my $group;
2505
2506     my $res = $empty_conf;
2507
2508     while (defined(my $line = <$fh>)) {
2509         next if $line =~ m/^#/;
2510         next if $line =~ m/^\s*$/;
2511
2512         chomp $line;
2513
2514         my $linenr = $fh->input_line_number();
2515         my $prefix = "$filename (line $linenr)";
2516
2517         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2518             $section = 'options';
2519             next;
2520         }
2521
2522         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2523             $section = 'aliases';
2524             next;
2525         }
2526
2527         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2528             $section = 'groups';
2529             $group = lc($1);
2530             my $comment = $2;
2531             eval {
2532                 die "security group name too long\n" if length($group) > $max_group_name_length;
2533                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2534             };
2535             if (my $err = $@) {
2536                 ($section, $group, $comment) = undef;
2537                 warn "$prefix: $err";
2538                 next;
2539             }
2540
2541             $res->{$section}->{$group} = [];
2542             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2543                 if $comment;
2544             next;
2545         }
2546
2547         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2548             $section = 'rules';
2549             next;
2550         }
2551
2552         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2553             $section = 'ipset';
2554             $group = lc($1);
2555             my $comment = $2;
2556             eval {
2557                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2558                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2559             };
2560             if (my $err = $@) {
2561                 ($section, $group, $comment) = undef;
2562                 warn "$prefix: $err";
2563                 next;
2564             }
2565
2566             $res->{$section}->{$group} = [];
2567             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2568                 if $comment;
2569             next;
2570         }
2571
2572         if (!$section) {
2573             warn "$prefix: skip line - no section\n";
2574             next;
2575         }
2576
2577         if ($section eq 'options') {
2578             eval {
2579                 my ($opt, $value);
2580                 if ($rule_env eq 'cluster') {
2581                     ($opt, $value) = parse_clusterfw_option($line);
2582                 } elsif ($rule_env eq 'host') {
2583                     ($opt, $value) = parse_hostfw_option($line);
2584                 } else {
2585                     ($opt, $value) = parse_vmfw_option($line);
2586                 }
2587                 $res->{options}->{$opt} = $value;
2588             };
2589             warn "$prefix: $@" if $@;
2590         } elsif ($section eq 'aliases') {
2591             eval {
2592                 my $data = parse_alias($line);
2593                 $res->{aliases}->{lc($data->{name})} = $data;
2594             };
2595             warn "$prefix: $@" if $@;
2596         } elsif ($section eq 'rules') {
2597             my $rule;
2598             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2599             if (my $err = $@) {
2600                 warn "$prefix: $err";
2601                 next;
2602             }
2603             push @{$res->{$section}}, $rule;
2604         } elsif ($section eq 'groups') {
2605             my $rule;
2606             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2607             if (my $err = $@) {
2608                 warn "$prefix: $err";
2609                 next;
2610             }
2611             push @{$res->{$section}->{$group}}, $rule;
2612         } elsif ($section eq 'ipset') {
2613             # we can add single line comments to the end of the rule
2614             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2615
2616             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2617             my $nomatch = $1;
2618             my $cidr = $2;
2619             my $errors;
2620
2621             if ($nomatch && !$feature_ipset_nomatch) {
2622                 $errors->{nomatch} = "nomatch not supported by kernel";
2623             }
2624
2625             eval {
2626                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2627                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2628                 } else {
2629                     $cidr = parse_ip_or_cidr($cidr);
2630                 }
2631             };
2632             if (my $err = $@) {
2633                 chomp $err;
2634                 $errors->{cidr} = $err;
2635             }
2636
2637             my $entry = { cidr => $cidr };
2638             $entry->{nomatch} = 1 if $nomatch;
2639             $entry->{comment} = $comment if $comment;
2640             $entry->{errors} =  $errors if $errors;
2641
2642             if ($verbose && $errors) {
2643                 warn "$prefix - errors in ipset '$group': $line\n";
2644                 foreach my $p (keys %{$errors}) {
2645                     warn "  $p: $errors->{$p}\n";
2646                 }
2647             }
2648
2649             push @{$res->{$section}->{$group}}, $entry;
2650         } else {
2651             warn "$prefix: skip line - unknown section\n";
2652             next;
2653         }
2654     }
2655
2656     return $res;
2657 }
2658
2659 sub parse_hostfw_config {
2660     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2661
2662     my $empty_conf = { rules => [], options => {}};
2663
2664     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2665 }
2666
2667 sub parse_vmfw_config {
2668     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2669
2670     my $empty_conf = {
2671         rules => [],
2672         options => {},
2673         aliases => {},
2674         ipset => {} ,
2675         ipset_comments => {},
2676     };
2677
2678     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2679 }
2680
2681 sub parse_clusterfw_config {
2682     my ($filename, $fh, $verbose) = @_;
2683
2684     my $section;
2685     my $group;
2686
2687     my $empty_conf = {
2688         rules => [],
2689         options => {},
2690         aliases => {},
2691         groups => {},
2692         group_comments => {},
2693         ipset => {} ,
2694         ipset_comments => {},
2695     };
2696
2697     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2698 }
2699
2700 sub run_locked {
2701     my ($code, @param) = @_;
2702
2703     my $timeout = 10;
2704
2705     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2706
2707     die $@ if $@;
2708
2709     return $res;
2710 }
2711
2712 sub read_local_vm_config {
2713
2714     my $openvz = {};
2715     my $qemu = {};
2716
2717     my $vmdata = { openvz => $openvz, qemu => $qemu };
2718
2719     my $vmlist = PVE::Cluster::get_vmlist();
2720     return $vmdata if !$vmlist || !$vmlist->{ids};
2721     my $ids = $vmlist->{ids};
2722
2723     foreach my $vmid (keys %$ids) {
2724         next if !$vmid; # skip VE0
2725         my $d = $ids->{$vmid};
2726         next if !$d->{node} || $d->{node} ne $nodename;
2727         next if !$d->{type};
2728         if ($d->{type} eq 'openvz') {
2729             if ($have_pve_manager) {
2730                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2731                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2732                     $openvz->{$vmid} = $conf;
2733                 }
2734             }
2735         } elsif ($d->{type} eq 'qemu') {
2736             if ($have_qemu_server) {
2737                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2738                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2739                     $qemu->{$vmid} = $conf;
2740                 }
2741             }
2742         }
2743     }
2744
2745     return $vmdata;
2746 };
2747
2748 sub load_vmfw_conf {
2749     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2750
2751     my $vmfw_conf = {};
2752
2753     $dir = $pvefw_conf_dir if !defined($dir);
2754
2755     my $filename = "$dir/$vmid.fw";
2756     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2757         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2758         $vmfw_conf->{vmid} = $vmid;
2759     }
2760
2761     return $vmfw_conf;
2762 }
2763
2764 my $format_rules = sub {
2765     my ($rules, $allow_iface) = @_;
2766
2767     my $raw = '';
2768
2769     foreach my $rule (@$rules) {
2770         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2771             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2772             $raw .= uc($rule->{type});
2773             if ($rule->{macro}) {
2774                 $raw .= " $rule->{macro}($rule->{action})";
2775             } else {
2776                 $raw .= " " . $rule->{action};
2777             }
2778             if ($allow_iface && $rule->{iface}) {
2779                 $raw .= " -i $rule->{iface}";
2780             }
2781
2782             if ($rule->{type} ne  'group')  {
2783                 $raw .= " -source $rule->{source}" if $rule->{source};
2784                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2785                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2786                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2787                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2788             }
2789
2790             $raw .= " # " . encode('utf8', $rule->{comment})
2791                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2792             $raw .= "\n";
2793         } else {
2794             die "unknown rule type '$rule->{type}'";
2795         }
2796     }
2797
2798     return $raw;
2799 };
2800
2801 my $format_options = sub {
2802     my ($options) = @_;
2803
2804     my $raw = '';
2805
2806     $raw .= "[OPTIONS]\n\n";
2807     foreach my $opt (keys %$options) {
2808         $raw .= "$opt: $options->{$opt}\n";
2809     }
2810     $raw .= "\n";
2811
2812     return $raw;
2813 };
2814
2815 my $format_aliases = sub {
2816     my ($aliases) = @_;
2817
2818     my $raw = '';
2819
2820     $raw .= "[ALIASES]\n\n";
2821     foreach my $k (keys %$aliases) {
2822         my $e = $aliases->{$k};
2823         $raw .= "$e->{name} $e->{cidr}";
2824         $raw .= " # " . encode('utf8', $e->{comment})
2825             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2826         $raw .= "\n";
2827     }
2828     $raw .= "\n";
2829
2830     return $raw;
2831 };
2832
2833 my $format_ipsets = sub {
2834     my ($fw_conf) = @_;
2835
2836     my $raw = '';
2837
2838     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2839         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2840             my $utf8comment = encode('utf8', $comment);
2841             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2842         } else {
2843             $raw .= "[IPSET $ipset]\n\n";
2844         }
2845         my $options = $fw_conf->{ipset}->{$ipset};
2846
2847         my $nethash = {};
2848         foreach my $entry (@$options) {
2849             $nethash->{$entry->{cidr}} = $entry;
2850         }
2851
2852         foreach my $cidr (sort keys %$nethash) {
2853             my $entry = $nethash->{$cidr};
2854             my $line = $entry->{nomatch} ? '!' : '';
2855             $line .= $entry->{cidr};
2856             $line .= " # " . encode('utf8', $entry->{comment})
2857                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2858             $raw .= "$line\n";
2859         }
2860
2861         $raw .= "\n";
2862     }
2863
2864     return $raw;
2865 };
2866
2867 sub save_vmfw_conf {
2868     my ($vmid, $vmfw_conf) = @_;
2869
2870     my $raw = '';
2871
2872     my $options = $vmfw_conf->{options};
2873     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2874
2875     my $aliases = $vmfw_conf->{aliases};
2876     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2877
2878     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2879
2880     my $rules = $vmfw_conf->{rules} || [];
2881     if ($rules && scalar(@$rules)) {
2882         $raw .= "[RULES]\n\n";
2883         $raw .= &$format_rules($rules, 1);
2884         $raw .= "\n";
2885     }
2886
2887     mkdir $pvefw_conf_dir;
2888
2889     my $filename = "$pvefw_conf_dir/$vmid.fw";
2890     PVE::Tools::file_set_contents($filename, $raw);
2891 }
2892
2893 sub read_vm_firewall_configs {
2894     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2895
2896     my $vmfw_configs = {};
2897
2898     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2899         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2900         next if !$vmfw_conf->{options}; # skip if file does not exists
2901         $vmfw_configs->{$vmid} = $vmfw_conf;
2902     }
2903     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2904         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2905         next if !$vmfw_conf->{options}; # skip if file does not exists
2906         $vmfw_configs->{$vmid} = $vmfw_conf;
2907     }
2908
2909     return $vmfw_configs;
2910 }
2911
2912 sub get_option_log_level {
2913     my ($options, $k) = @_;
2914
2915     my $v = $options->{$k};
2916     $v = $default_log_level if !defined($v);
2917
2918     return undef if $v eq '' || $v eq 'nolog';
2919
2920     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2921
2922     return $v if ($v >= 0) && ($v <= 7);
2923
2924     warn "unknown log level ($k = '$v')\n";
2925
2926     return undef;
2927 }
2928
2929 sub generate_std_chains {
2930     my ($ruleset, $options, $ipversion) = @_;
2931
2932     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2933
2934     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2935
2936     my $chain;
2937
2938     if ($ipversion == 4) {
2939         # same as shorewall smurflog.
2940         $chain = 'PVEFW-smurflog';
2941         $std_chains->{$chain} = [];
2942
2943         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2944         push @{$std_chains->{$chain}}, "-j DROP";
2945     }
2946
2947     # same as shorewall logflags action.
2948     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2949     $chain = 'PVEFW-logflags';
2950     $std_chains->{$chain} = [];
2951
2952     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2953     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2954     push @{$std_chains->{$chain}}, "-j DROP";
2955
2956     foreach my $chain (keys %$std_chains) {
2957         ruleset_create_chain($ruleset, $chain);
2958         foreach my $rule (@{$std_chains->{$chain}}) {
2959             if (ref($rule)) {
2960                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2961             } else {
2962                 ruleset_addrule($ruleset, $chain, $rule);
2963             }
2964         }
2965     }
2966 }
2967
2968 sub generate_ipset_chains {
2969     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2970
2971     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2972
2973         my $options = $fw_conf->{ipset}->{$ipset};
2974
2975         # remove duplicates
2976         my $nethash = {};
2977         foreach my $entry (@$options) {
2978             next if $entry->{errors}; # skip entries with errors
2979             eval {
2980                 my ($cidr, $ver);
2981                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2982                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2983                 } else {
2984                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2985                 }
2986                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2987                 if ($ver == 6) {
2988                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2989                     $cidr = inet_ntop(AF_INET6, $ipv6);
2990                     $cidr =~ s|/128$||;
2991                 } else {
2992                     $cidr =~ s|/32$||;
2993                 }
2994
2995                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2996             };
2997             warn $@ if $@;
2998         }
2999
3000         foreach my $ipversion (4, 6) {
3001             my $data = $nethash->{$ipversion};
3002
3003             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3004
3005             my $hashsize = scalar(@$options);
3006             if ($hashsize <= 64) {
3007                 $hashsize = 64;
3008             } else {
3009                 $hashsize = round_powerof2($hashsize);
3010             }
3011
3012             my $family = $ipversion == "6" ? "inet6" : "inet";
3013
3014             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3015
3016             foreach my $cidr (sort keys %$data) {
3017                 my $entry = $data->{$cidr};
3018
3019                 my $cmd = "add $name $cidr";
3020                 if ($entry->{nomatch}) {
3021                     if ($feature_ipset_nomatch) {
3022                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3023                     } else {
3024                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3025                     }
3026                 } else {
3027                     push @{$ipset_ruleset->{$name}}, $cmd;
3028                 }
3029             }
3030         }
3031     }
3032 }
3033
3034 sub round_powerof2 {
3035     my ($int) = @_;
3036
3037     $int--;
3038     $int |= $int >> $_ foreach (1,2,4,8,16);
3039     return ++$int;
3040 }
3041
3042 sub load_clusterfw_conf {
3043     my ($filename, $verbose) = @_;
3044
3045     $filename = $clusterfw_conf_filename if !defined($filename);
3046
3047     my $cluster_conf = {};
3048     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3049         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3050     }
3051
3052     return $cluster_conf;
3053 }
3054
3055 sub save_clusterfw_conf {
3056     my ($cluster_conf) = @_;
3057
3058     my $raw = '';
3059
3060     my $options = $cluster_conf->{options};
3061     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3062
3063     my $aliases = $cluster_conf->{aliases};
3064     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3065
3066     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3067
3068     my $rules = $cluster_conf->{rules};
3069     if ($rules && scalar(@$rules)) {
3070         $raw .= "[RULES]\n\n";
3071         $raw .= &$format_rules($rules, 1);
3072         $raw .= "\n";
3073     }
3074
3075     if ($cluster_conf->{groups}) {
3076         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3077             my $rules = $cluster_conf->{groups}->{$group};
3078             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3079                 my $utf8comment = encode('utf8', $comment);
3080                 $raw .= "[group $group] # $utf8comment\n\n";
3081             } else {
3082                 $raw .= "[group $group]\n\n";
3083             }
3084
3085             $raw .= &$format_rules($rules, 0);
3086             $raw .= "\n";
3087         }
3088     }
3089
3090     mkdir $pvefw_conf_dir;
3091     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3092 }
3093
3094 sub load_hostfw_conf {
3095     my ($cluster_conf, $filename, $verbose) = @_;
3096
3097     $filename = $hostfw_conf_filename if !defined($filename);
3098
3099     my $hostfw_conf = {};
3100     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3101         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3102     }
3103     return $hostfw_conf;
3104 }
3105
3106 sub save_hostfw_conf {
3107     my ($hostfw_conf) = @_;
3108
3109     my $raw = '';
3110
3111     my $options = $hostfw_conf->{options};
3112     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3113
3114     my $rules = $hostfw_conf->{rules};
3115     if ($rules && scalar(@$rules)) {
3116         $raw .= "[RULES]\n\n";
3117         $raw .= &$format_rules($rules, 1);
3118         $raw .= "\n";
3119     }
3120
3121     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3122 }
3123
3124 sub compile {
3125     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3126
3127     my $vmfw_configs;
3128
3129     if ($vmdata) { # test mode
3130         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3131         my $filename = "$testdir/cluster.fw";
3132         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3133
3134         $filename = "$testdir/host.fw";
3135         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3136
3137         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3138     } else { # normal operation
3139         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3140
3141         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3142
3143         $vmdata = read_local_vm_config();
3144         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3145     }
3146
3147     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3148     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3149
3150     return ($ruleset, $ipset_ruleset, $rulesetv6);
3151 }
3152
3153 sub compile_iptables_filter {
3154     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3155
3156     $cluster_conf->{ipset}->{venet0} = [];
3157     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3158
3159     my $localnet;
3160     if ($cluster_conf->{aliases}->{local_network}) {
3161         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3162     } else {
3163         my $localnet_ver;
3164         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3165
3166         $cluster_conf->{aliases}->{local_network} = {
3167             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3168     }
3169
3170     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3171
3172     return ({}, {}) if !$cluster_conf->{options}->{enable};
3173
3174     my $ruleset = {};
3175
3176     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3177     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3178
3179     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3180
3181     my $hostfw_options = $hostfw_conf->{options} || {};
3182
3183     # fixme: what log level should we use here?
3184     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3185
3186     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3187
3188
3189     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3190     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3191     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3192
3193     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3194     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3195
3196     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3197
3198     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3199     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3200
3201     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3202     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3203
3204     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3205
3206     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3207
3208     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3209
3210     my $ipset_ruleset = {};
3211
3212     if ($hostfw_enable) {
3213         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3214         warn $@ if $@; # just to be sure - should not happen
3215     }
3216
3217     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3218
3219     # generate firewall rules for QEMU VMs
3220     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3221         eval {
3222             my $conf = $vmdata->{qemu}->{$vmid};
3223             my $vmfw_conf = $vmfw_configs->{$vmid};
3224             return if !$vmfw_conf;
3225
3226             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3227
3228             foreach my $netid (keys %$conf) {
3229                 next if $netid !~ m/^net(\d+)$/;
3230                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3231                 next if !$net->{firewall};
3232                 my $iface = "tap${vmid}i$1";
3233
3234                 my $macaddr = $net->{macaddr};
3235                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3236                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3237                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3238                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3239             }
3240         };
3241         warn $@ if $@; # just to be sure - should not happen
3242     }
3243
3244     # generate firewall rules for OpenVZ containers
3245     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3246         eval {
3247             my $conf = $vmdata->{openvz}->{$vmid};
3248
3249             my $vmfw_conf = $vmfw_configs->{$vmid};
3250             return if !$vmfw_conf;
3251
3252             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3253
3254             if ($vmfw_conf->{options}->{enable}) {
3255                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3256                     my $ip = $conf->{ip_address}->{value};
3257                     $ip =~ s/\s+/,/g;
3258
3259                     my @ips = ();
3260
3261                     foreach my $singleip (split(',', $ip)) {
3262                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3263                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3264                         push @ips, $singleip if $singleip_ver == $ipversion;
3265                     }
3266
3267                     if (scalar(@ips)) {
3268                         my $ip_list = join(',', @ips);
3269                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3270                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3271                     }
3272                 }
3273             }
3274
3275             if ($conf->{netif} && $conf->{netif}->{value}) {
3276                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3277                 foreach my $netid (keys %$netif) {
3278                     my $d = $netif->{$netid};
3279                     my $bridge = $d->{bridge};
3280                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3281                     my $macaddr = $d->{mac};
3282                     my $iface = $d->{host_ifname};
3283                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3284                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3285                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3286                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3287                 }
3288             }
3289         };
3290         warn $@ if $@; # just to be sure - should not happen
3291     }
3292
3293     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3294         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3295     }
3296
3297     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3298
3299     return ($ruleset, $ipset_ruleset);
3300 }
3301
3302 sub get_ruleset_status {
3303     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3304
3305     my $statushash = {};
3306
3307     foreach my $chain (sort keys %$ruleset) {
3308         my $sig = &$digest_fn($ruleset->{$chain});
3309
3310         $statushash->{$chain}->{sig} = $sig;
3311
3312         my $oldsig = $active_chains->{$chain};
3313         if (!defined($oldsig)) {
3314             $statushash->{$chain}->{action} = 'create';
3315         } else {
3316             if ($oldsig eq $sig) {
3317                 $statushash->{$chain}->{action} = 'exists';
3318             } else {
3319                 $statushash->{$chain}->{action} = 'update';
3320             }
3321         }
3322         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3323         foreach my $cmd (@{$ruleset->{$chain}}) {
3324             print "\t$cmd\n" if $verbose;
3325         }
3326     }
3327
3328     foreach my $chain (sort keys %$active_chains) {
3329         if (!defined($ruleset->{$chain})) {
3330             my $sig = $active_chains->{$chain};
3331             $statushash->{$chain}->{action} = 'delete';
3332             $statushash->{$chain}->{sig} = $sig;
3333             print "delete $chain ($sig)\n" if $verbose;
3334         }
3335     }
3336
3337     return $statushash;
3338 }
3339
3340 sub print_sig_rule {
3341     my ($chain, $sig) = @_;
3342
3343     # We just use this to store a SHA1 checksum used to detect changes
3344     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3345 }
3346
3347 sub get_ruleset_cmdlist {
3348     my ($ruleset, $verbose, $iptablescmd) = @_;
3349
3350     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3351
3352     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3353     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3354
3355     # create missing chains first
3356     foreach my $chain (sort keys %$ruleset) {
3357         my $stat = $statushash->{$chain};
3358         die "internal error" if !$stat;
3359         next if $stat->{action} ne 'create';
3360
3361         $cmdlist .= ":$chain - [0:0]\n";
3362     }
3363
3364     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3365         my $chain = "PVEFW-$h";
3366         if ($ruleset->{$chain} && !$hooks->{$h}) {
3367             $cmdlist .= "-A $h -j $chain\n";
3368         }
3369     }
3370
3371     foreach my $chain (sort keys %$ruleset) {
3372         my $stat = $statushash->{$chain};
3373         die "internal error" if !$stat;
3374
3375         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3376             $cmdlist .= "-F $chain\n";
3377             foreach my $cmd (@{$ruleset->{$chain}}) {
3378                 $cmdlist .= "$cmd\n";
3379             }
3380             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3381         } elsif ($stat->{action} eq 'delete') {
3382             die "internal error"; # this should not happen
3383         } elsif ($stat->{action} eq 'exists') {
3384             # do nothing
3385         } else {
3386             die "internal error - unknown status '$stat->{action}'";
3387         }
3388     }
3389
3390     foreach my $chain (keys %$statushash) {
3391         next if $statushash->{$chain}->{action} ne 'delete';
3392         $cmdlist .= "-F $chain\n";
3393     }
3394     foreach my $chain (keys %$statushash) {
3395         next if $statushash->{$chain}->{action} ne 'delete';
3396         next if $chain eq 'PVEFW-INPUT';
3397         next if $chain eq 'PVEFW-OUTPUT';
3398         next if $chain eq 'PVEFW-FORWARD';
3399         $cmdlist .= "-X $chain\n";
3400     }
3401
3402     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3403
3404     $cmdlist .= "COMMIT\n";
3405
3406     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3407 }
3408
3409 sub get_ipset_cmdlist {
3410     my ($ruleset, $verbose) = @_;
3411
3412     my $cmdlist = "";
3413
3414     my $delete_cmdlist = "";
3415
3416     my $active_chains = ipset_get_chains();
3417     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3418
3419     # remove stale _swap chains
3420     foreach my $chain (keys %$active_chains) {
3421         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3422             $cmdlist .= "destroy $chain\n";
3423         }
3424     }
3425
3426     foreach my $chain (keys %$ruleset) {
3427         my $stat = $statushash->{$chain};
3428         die "internal error" if !$stat;
3429
3430         if ($stat->{action} eq 'create') {
3431             foreach my $cmd (@{$ruleset->{$chain}}) {
3432                 $cmdlist .= "$cmd\n";
3433             }
3434         }
3435     }
3436
3437     foreach my $chain (keys %$ruleset) {
3438         my $stat = $statushash->{$chain};
3439         die "internal error" if !$stat;
3440
3441         if ($stat->{action} eq 'update') {
3442             my $chain_swap = $chain."_swap";
3443
3444             foreach my $cmd (@{$ruleset->{$chain}}) {
3445                 $cmd =~ s/$chain/$chain_swap/;
3446                 $cmdlist .= "$cmd\n";
3447             }
3448             $cmdlist .= "swap $chain_swap $chain\n";
3449             $cmdlist .= "flush $chain_swap\n";
3450             $cmdlist .= "destroy $chain_swap\n";
3451         }
3452     }
3453
3454      # the remove unused chains
3455     foreach my $chain (keys %$statushash) {
3456         next if $statushash->{$chain}->{action} ne 'delete';
3457
3458         $delete_cmdlist .= "flush $chain\n";
3459         $delete_cmdlist .= "destroy $chain\n";
3460     }
3461
3462     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3463
3464     return ($cmdlist, $delete_cmdlist, $changes);
3465 }
3466
3467 sub apply_ruleset {
3468     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3469
3470     enable_bridge_firewall();
3471
3472     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3473         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3474
3475     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3476     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3477
3478     if ($verbose) {
3479         if ($ipset_changes) {
3480             print "ipset changes:\n";
3481             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3482             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3483         }
3484
3485         if ($changes) {
3486             print "iptables changes:\n";
3487             print $cmdlist;
3488         }
3489
3490         if ($changesv6) {
3491             print "ip6tables changes:\n";
3492             print $cmdlistv6;
3493         }
3494     }
3495
3496     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3497     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3498
3499     ipset_restore_cmdlist($ipset_create_cmdlist);
3500
3501     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3502     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3503
3504     iptables_restore_cmdlist($cmdlist);
3505
3506     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3507     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3508
3509     ip6tables_restore_cmdlist($cmdlistv6);
3510
3511     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3512     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3513
3514     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3515
3516     # test: re-read status and check if everything is up to date
3517     my $active_chains = iptables_get_chains();
3518     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3519
3520     my $errors;
3521     foreach my $chain (sort keys %$ruleset) {
3522         my $stat = $statushash->{$chain};
3523         if ($stat->{action} ne 'exists') {
3524             warn "unable to update chain '$chain'\n";
3525             $errors = 1;
3526         }
3527     }
3528
3529     my $active_chainsv6 = iptables_get_chains("ip6tables");
3530     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3531
3532     foreach my $chain (sort keys %$rulesetv6) {
3533         my $stat = $statushashv6->{$chain};
3534         if ($stat->{action} ne 'exists') {
3535             warn "unable to update chain '$chain'\n";
3536             $errors = 1;
3537         }
3538     }
3539
3540     die "unable to apply firewall changes\n" if $errors;
3541
3542     update_nf_conntrack_max($hostfw_conf);
3543
3544     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3545
3546 }
3547
3548 sub update_nf_conntrack_max {
3549     my ($hostfw_conf) = @_;
3550
3551     my $max = 65536; # reasonable default
3552
3553     my $options = $hostfw_conf->{options} || {};
3554
3555     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3556         $max = $options->{nf_conntrack_max};
3557         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3558     }
3559
3560     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3561     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3562
3563     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3564
3565     if ($current != $max) {
3566         my $hashsize = int($max/4);
3567         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3568         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3569     }
3570 }
3571
3572 sub update_nf_conntrack_tcp_timeout_established {
3573     my ($hostfw_conf) = @_;
3574
3575     my $options = $hostfw_conf->{options} || {};
3576
3577     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3578
3579     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3580 }
3581
3582 sub remove_pvefw_chains {
3583
3584     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3585     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3586     PVE::Firewall::remove_pvefw_chains_ipset();
3587
3588 }
3589
3590 sub remove_pvefw_chains_iptables {
3591     my ($iptablescmd) = @_;
3592
3593     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3594     my $cmdlist = "*filter\n";
3595
3596     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3597         if ($hooks->{$h}) {
3598             $cmdlist .= "-D $h -j PVEFW-$h\n";
3599         }
3600     }
3601
3602     foreach my $chain (keys %$chash) {
3603         $cmdlist .= "-F $chain\n";
3604     }
3605
3606     foreach my $chain (keys %$chash) {
3607         $cmdlist .= "-X $chain\n";
3608     }
3609     $cmdlist .= "COMMIT\n";
3610
3611     if($iptablescmd eq "ip6tables") {
3612         ip6tables_restore_cmdlist($cmdlist);
3613     } else {
3614         iptables_restore_cmdlist($cmdlist);
3615     }
3616 }
3617
3618 sub remove_pvefw_chains_ipset {
3619
3620     my $ipset_chains = ipset_get_chains();
3621
3622     my $cmdlist = "";
3623
3624     foreach my $chain (keys %$ipset_chains) {
3625         $cmdlist .= "flush $chain\n";
3626         $cmdlist .= "destroy $chain\n";
3627     }
3628
3629     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3630 }
3631
3632 sub init {
3633     my $cluster_conf = load_clusterfw_conf();
3634     my $cluster_options = $cluster_conf->{options};
3635     my $enable = $cluster_options->{enable};
3636
3637     return if !$enable;
3638
3639     # load required modules here
3640 }
3641
3642 sub update {
3643     my $code = sub {
3644
3645         my $cluster_conf = load_clusterfw_conf();
3646         my $cluster_options = $cluster_conf->{options};
3647
3648         if (!$cluster_options->{enable}) {
3649             PVE::Firewall::remove_pvefw_chains();
3650             return;
3651         }
3652
3653         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3654
3655         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3656
3657         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3658     };
3659
3660     run_locked($code);
3661 }
3662
3663 1;