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